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Merge branch 'master' into sla-pr/1159-tim-doha 

Conflicts:
	spring-cloud/spring-cloud-bootstrap/svc-book/pom.xml
	spring-cloud/spring-cloud-bootstrap/svc-book/src/main/java/com/baeldung/spring/cloud/bootstrap/svcbook/BookServiceApplication.java
	spring-cloud/spring-cloud-bootstrap/svc-rating/pom.xml
	spring-cloud/spring-cloud-bootstrap/svc-rating/src/main/java/com/baeldung/spring/cloud/bootstrap/svcrating/RatingServiceApplication.java
This commit is contained in:
slavisa-baeldung 2017-03-02 05:43:19 +01:00
parent 0d31cab067 41bf9ddd6d
commit 3b91bb63d1
356 changed files with 12094 additions and 1275 deletions
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3
JGit/README.md Normal file
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## Relevant articles:
- [A Guide to JGit](http://www.baeldung.com/jgit)

4
algorithms/README.md Normal file
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## Relevant articles:
- [Dijkstra Algorithm in Java](http://www.baeldung.com/java-dijkstra)
- [Introduction to Cobertura](http://www.baeldung.com/cobertura)

21
algorithms/pom.xml
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</plugins>
</pluginManagement>
</build>
</project>
<reporting>
<plugins>
<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>cobertura-maven-plugin</artifactId>
<version>2.7</version>
<configuration>
<instrumentation>
<ignores>
<ignore>com/baeldung/algorithms/dijkstra/*</ignore>
</ignores>
<excludes>
<exclude>com/baeldung/algorithms/dijkstra/*</exclude>
</excludes>
</instrumentation>
</configuration>
</plugin>
</plugins>
</reporting>
</project>

2
apache-bval/README.md Normal file
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### Relevant Articles:
- [Intro to Apache BVal](http://www.baeldung.com/apache-bval)

51
apache-bval/pom.xml Normal file
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<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>apache-bval</groupId>
<artifactId>apache-bval</artifactId>
<version>0.0.1-SNAPSHOT</version>
<dependencies>
<dependency>
<groupId>org.apache.bval</groupId>
<artifactId>bval-jsr</artifactId>
<version>${bval.version}</version>
</dependency>
<dependency>
<groupId>javax.validation</groupId>
<artifactId>validation-api</artifactId>
<version>1.1.0.Final</version>
</dependency>
<dependency>
<groupId>org.apache.bval</groupId>
<artifactId>bval-extras</artifactId>
<version>${bval.version}</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>${junit.version}</version>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>${maven-compiler-plugin.version}</version>
<configuration>
<source>1.8</source>
<target>1.8</target>
</configuration>
</plugin>
</plugins>
</build>
<properties>
<maven-compiler-plugin.version>3.6.0</maven-compiler-plugin.version>
<junit.version>4.12</junit.version>
<bval.version>1.1.2</bval.version>
</properties>
</project>

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apache-bval/src/main/java/com/baeldung/model/User.java Normal file
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package com.baeldung.model;
import java.io.File;
import javax.validation.constraints.Min;
import javax.validation.constraints.NotNull;
import javax.validation.constraints.Size;
import org.apache.bval.constraints.Email;
import org.apache.bval.constraints.NotEmpty;
import org.apache.bval.extras.constraints.checkdigit.IBAN;
import org.apache.bval.extras.constraints.creditcard.Visa;
import org.apache.bval.extras.constraints.file.Directory;
import org.apache.bval.extras.constraints.net.InetAddress;
import com.baeldung.validation.Password;
public class User {
@NotNull
@Email
private String email;
@NotEmpty
@Password
private String password;
@Size(min = 1, max = 20)
private String name;
@Min(18)
private int age;
@Visa
private String cardNumber = "";
@IBAN
private String iban = "";
@InetAddress
private String website = "";
@Directory
private File mainDirectory=new File(".");
public User() {
}
public User(String email, String password, String name, int age) {
super();
this.email = email;
this.password = password;
this.name = name;
this.age = age;
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
public String getCardNumber() {
return cardNumber;
}
public void setCardNumber(String cardNumber) {
this.cardNumber = cardNumber;
}
public String getIban() {
return iban;
}
public void setIban(String iban) {
this.iban = iban;
}
public String getWebsite() {
return website;
}
public void setWebsite(String website) {
this.website = website;
}
public File getMainDirectory() {
return mainDirectory;
}
public void setMainDirectory(File mainDirectory) {
this.mainDirectory = mainDirectory;
}
}

25
apache-bval/src/main/java/com/baeldung/validation/Password.java Normal file
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package com.baeldung.validation;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import javax.validation.Constraint;
import javax.validation.Payload;
import static java.lang.annotation.ElementType.*;
@Constraint(validatedBy = { PasswordValidator.class })
@Target({ METHOD, FIELD, ANNOTATION_TYPE, CONSTRUCTOR, PARAMETER })
@Retention(RetentionPolicy.RUNTIME)
public @interface Password {
String message() default "Invalid password";
Class<?>[] groups() default {};
Class<? extends Payload>[] payload() default {};
int length() default 6;
int nonAlpha() default 1;
}

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apache-bval/src/main/java/com/baeldung/validation/PasswordValidator.java Normal file
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package com.baeldung.validation;
import javax.validation.ConstraintValidator;
import javax.validation.ConstraintValidatorContext;
public class PasswordValidator implements ConstraintValidator<Password, String> {
private int length;
private int nonAlpha;
@Override
public void initialize(Password password) {
this.length = password.length();
this.nonAlpha = password.nonAlpha();
}
@Override
public boolean isValid(String value, ConstraintValidatorContext context) {
if (value.length() < length) {
return false;
}
int nonAlphaNr = 0;
for (int i = 0; i < value.length(); i++) {
if (!Character.isLetterOrDigit(value.charAt(i))) {
nonAlphaNr++;
}
}
if (nonAlphaNr < nonAlpha) {
return false;
}
return true;
}
}

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apache-bval/src/test/java/com/baeldung/validation/ValidationTest.java Normal file
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package com.baeldung.validation;
import java.io.File;
import java.util.Set;
import javax.validation.ConstraintViolation;
import javax.validation.Validation;
import javax.validation.Validator;
import javax.validation.ValidatorFactory;
import org.apache.bval.jsr.ApacheValidationProvider;
import org.junit.AfterClass;
import org.junit.BeforeClass;
import org.junit.Test;
import static org.junit.Assert.*;
import com.baeldung.model.User;
public class ValidationTest {
private static ValidatorFactory validatorFactory;
private static Validator validator;
@BeforeClass
public static void setup() {
validatorFactory = Validation.byProvider(ApacheValidationProvider.class)
.configure()
.buildValidatorFactory();
validator = validatorFactory.getValidator();
}
@Test
public void givenUser_whenValidate_thenValidationViolations() {
User user = new User("ana@yahoo.com", "pass", "nameTooLong_______________", 15);
Set<ConstraintViolation<User>> violations = validator.validate(user);
assertTrue("no violations", violations.size() > 0);
}
@Test
public void givenInvalidAge_whenValidateProperty_thenConstraintViolation() {
User user = new User("ana@yahoo.com", "pass", "Ana", 12);
Set<ConstraintViolation<User>> propertyViolations = validator.validateProperty(user, "age");
assertEquals("size is not 1", 1, propertyViolations.size());
}
@Test
public void givenValidAge_whenValidateValue_thenNoConstraintViolation() {
User user = new User("ana@yahoo.com", "pass", "Ana", 18);
Set<ConstraintViolation<User>> valueViolations = validator.validateValue(User.class, "age", 20);
assertEquals("size is not 0", 0, valueViolations.size());
}
@Test
public void whenValidateNonJSR_thenCorrect() {
User user = new User("ana@yahoo.com", "pass", "Ana", 20);
user.setCardNumber("1234");
user.setIban("1234");
user.setWebsite("10.0.2.50");
user.setMainDirectory(new File("."));
Set<ConstraintViolation<User>> violations = validator.validateProperty(user, "iban");
assertEquals("size is not 1", 1, violations.size());
violations = validator.validateProperty(user, "website");
assertEquals("size is not 0", 0, violations.size());
violations = validator.validateProperty(user, "mainDirectory");
assertEquals("size is not 0", 0, violations.size());
}
@Test
public void givenInvalidPassword_whenValidatePassword_thenConstraintViolation() {
User user = new User("ana@yahoo.com", "password", "Ana", 20);
Set<ConstraintViolation<User>> violations = validator.validateProperty(user, "password");
assertEquals("message incorrect", "Invalid password", violations.iterator()
.next()
.getMessage());
}
@Test
public void givenValidPassword_whenValidatePassword_thenNoConstraintViolation() {
User user = new User("ana@yahoo.com", "password#", "Ana", 20);
Set<ConstraintViolation<User>> violations = validator.validateProperty(user, "password");
assertEquals("size is not 0", 0, violations.size());
}
@AfterClass
public static void close() {
if (validatorFactory != null) {
validatorFactory.close();
}
}
}

50
apache-solrj/pom.xml Normal file
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<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.baeldung</groupId>
<artifactId>apache-solrj</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>apache-solrj</name>
<properties>
<junit.version>4.12</junit.version>
<maven-surefire-plugin.version>2.19.1</maven-surefire-plugin.version>
</properties>
<dependencies>
<dependency>
<groupId>org.apache.solr</groupId>
<artifactId>solr-solrj</artifactId>
<version>6.4.0</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>${junit.version}</version>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<version>2.3.2</version>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin</artifactId>
<version>${maven-surefire-plugin.version}</version>
<configuration>
<source>1.8</source>
<target>1.8</target>
<excludes>
<exclude>**/*IntegrationTest.java</exclude>
<exclude>**/*LiveTest.java</exclude>
</excludes>
</configuration>
</plugin>
</plugins>
</build>
</project>

44
apache-solrj/src/main/java/com/baeldung/solrjava/ProductBean.java Normal file
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package com.baeldung.solrjava;
import org.apache.solr.client.solrj.beans.Field;
public class ProductBean {
String id;
String name;
String price;
public ProductBean(String id, String name, String price) {
super();
this.id = id;
this.name = name;
this.price = price;
}
public String getId() {
return id;
}
@Field("id")
protected void setId(String id) {
this.id = id;
}
public String getName() {
return name;
}
@Field("name")
protected void setName(String name) {
this.name = name;
}
public String getPrice() {
return price;
}
@Field("price")
protected void setPrice(String price) {
this.price = price;
}
}

56
apache-solrj/src/main/java/com/baeldung/solrjava/SolrJavaIntegration.java Normal file
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package com.baeldung.solrjava;
import java.io.IOException;
import org.apache.solr.client.solrj.SolrServerException;
import org.apache.solr.client.solrj.impl.HttpSolrClient;
import org.apache.solr.client.solrj.impl.XMLResponseParser;
import org.apache.solr.common.SolrInputDocument;
public class SolrJavaIntegration {
private HttpSolrClient solrClient;
public SolrJavaIntegration(String clientUrl) {
solrClient = new HttpSolrClient.Builder(clientUrl).build();
solrClient.setParser(new XMLResponseParser());
}
public void addProductBean(ProductBean pBean) throws IOException, SolrServerException {
solrClient.addBean(pBean);
solrClient.commit();
}
public void addSolrDocument(String documentId, String itemName, String itemPrice) throws SolrServerException, IOException {
SolrInputDocument document = new SolrInputDocument();
document.addField("id", documentId);
document.addField("name", itemName);
document.addField("price", itemPrice);
solrClient.add(document);
solrClient.commit();
}
public void deleteSolrDocumentById(String documentId) throws SolrServerException, IOException {
solrClient.deleteById(documentId);
solrClient.commit();
}
public void deleteSolrDocumentByQuery(String query) throws SolrServerException, IOException {
solrClient.deleteByQuery(query);
solrClient.commit();
}
protected HttpSolrClient getSolrClient() {
return solrClient;
}
protected void setSolrClient(HttpSolrClient solrClient) {
this.solrClient = solrClient;
}
}

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apache-solrj/src/test/java/com/baeldung/solrjava/SolrJavaIntegrationTest.java Normal file
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package com.baeldung.solrjava;
import static org.junit.Assert.assertEquals;
import java.io.IOException;
import org.apache.solr.client.solrj.SolrQuery;
import org.apache.solr.client.solrj.SolrServerException;
import org.apache.solr.client.solrj.response.QueryResponse;
import org.apache.solr.common.SolrDocument;
import org.apache.solr.common.SolrDocumentList;
import org.junit.Before;
import org.junit.Test;
public class SolrJavaIntegrationTest {
private SolrJavaIntegration solrJavaIntegration;
@Before
public void setUp() throws Exception {
solrJavaIntegration = new SolrJavaIntegration("http://localhost:8983/solr/bigboxstore");
solrJavaIntegration.addSolrDocument("123456", "Kenmore Dishwasher", "599.99");
}
@Test
public void whenAdd_thenVerifyAddedByQueryOnId() throws SolrServerException, IOException {
SolrQuery query = new SolrQuery();
query.set("q", "id:123456");
QueryResponse response = null;
response = solrJavaIntegration.getSolrClient().query(query);
SolrDocumentList docList = response.getResults();
assertEquals(1, docList.getNumFound());
for (SolrDocument doc : docList) {
assertEquals("Kenmore Dishwasher", (String) doc.getFieldValue("name"));
assertEquals((Double) 599.99, (Double) doc.getFieldValue("price"));
}
}
@Test
public void whenAdd_thenVerifyAddedByQueryOnPrice() throws SolrServerException, IOException {
SolrQuery query = new SolrQuery();
query.set("q", "price:599.99");
QueryResponse response = null;
response = solrJavaIntegration.getSolrClient().query(query);
SolrDocumentList docList = response.getResults();
assertEquals(1, docList.getNumFound());
for (SolrDocument doc : docList) {
assertEquals("123456", (String) doc.getFieldValue("id"));
assertEquals((Double) 599.99, (Double) doc.getFieldValue("price"));
}
}
@Test
public void whenAdd_thenVerifyAddedByQuery() throws SolrServerException, IOException {
SolrDocument doc = solrJavaIntegration.getSolrClient().getById("123456");
assertEquals("Kenmore Dishwasher", (String) doc.getFieldValue("name"));
assertEquals((Double) 599.99, (Double) doc.getFieldValue("price"));
}
@Test
public void whenAddBean_thenVerifyAddedByQuery() throws SolrServerException, IOException {
ProductBean pBean = new ProductBean("888", "Apple iPhone 6s", "299.99");
solrJavaIntegration.addProductBean(pBean);
SolrDocument doc = solrJavaIntegration.getSolrClient().getById("888");
assertEquals("Apple iPhone 6s", (String) doc.getFieldValue("name"));
assertEquals((Double) 299.99, (Double) doc.getFieldValue("price"));
}
@Test
public void whenDeleteById_thenVerifyDeleted() throws SolrServerException, IOException {
solrJavaIntegration.deleteSolrDocumentById("123456");
SolrQuery query = new SolrQuery();
query.set("q", "id:123456");
QueryResponse response = solrJavaIntegration.getSolrClient().query(query);
SolrDocumentList docList = response.getResults();
assertEquals(0, docList.getNumFound());
}
@Test
public void whenDeleteByQuery_thenVerifyDeleted() throws SolrServerException, IOException {
solrJavaIntegration.deleteSolrDocumentByQuery("name:Kenmore Dishwasher");
SolrQuery query = new SolrQuery();
query.set("q", "id:123456");
QueryResponse response = null;
response = solrJavaIntegration.getSolrClient().query(query);
SolrDocumentList docList = response.getResults();
assertEquals(0, docList.getNumFound());
}
}

3
apache-thrift/README.md Normal file
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## Relevant articles:
- [Working with Apache Thrift](http://www.baeldung.com/apache-thrift)

3
apache-velocity/README.md Normal file
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@ -0,0 +1,3 @@
## Relevant articles:
- [Introduction to Apache Velocity](http://www.baeldung.com/apache-velocity)

25
aws/pom.xml
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@ -7,17 +7,36 @@
<packaging>jar</packaging>
<name>aws</name>
<properties>
<commons-io.version>2.5</commons-io.version>
<aws-lambda-java-events.version>1.3.0</aws-lambda-java-events.version>
<aws-lambda-java-core.version>1.1.0</aws-lambda-java-core.version>
<gson.version>2.8.0</gson.version>
</properties>
<dependencies>
<dependency>
<groupId>com.amazonaws</groupId>
<artifactId>aws-lambda-java-core</artifactId>
<version>1.1.0</version>
<version>${aws-lambda-java-core.version}</version>
</dependency>
<dependency>
<groupId>com.amazonaws</groupId>
<artifactId>aws-lambda-java-events</artifactId>
<version>${aws-lambda-java-events.version}</version>
</dependency>
<dependency>
<groupId>commons-io</groupId>
<artifactId>commons-io</artifactId>
<version>2.5</version>
<version>${commons-io.version}</version>
</dependency>
<dependency>
<groupId>com.google.code.gson</groupId>
<artifactId>gson</artifactId>
<version>${gson.version}</version>
</dependency>
</dependencies>
@ -26,7 +45,7 @@
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-shade-plugin</artifactId>
<version>2.3</version>
<version>3.0.0</version>
<configuration>
<createDependencyReducedPom>false</createDependencyReducedPom>
</configuration>

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aws/src/main/java/com/baeldung/lambda/dynamodb/SavePersonHandler.java Normal file
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package com.baeldung.lambda.dynamodb;
import com.amazonaws.regions.Region;
import com.amazonaws.regions.Regions;
import com.amazonaws.services.dynamodbv2.AmazonDynamoDBClient;
import com.amazonaws.services.dynamodbv2.document.DynamoDB;
import com.amazonaws.services.dynamodbv2.document.Item;
import com.amazonaws.services.dynamodbv2.document.PutItemOutcome;
import com.amazonaws.services.dynamodbv2.document.spec.PutItemSpec;
import com.amazonaws.services.dynamodbv2.model.ConditionalCheckFailedException;
import com.amazonaws.services.lambda.runtime.Context;
import com.amazonaws.services.lambda.runtime.RequestHandler;
import com.baeldung.lambda.dynamodb.bean.PersonRequest;
import com.baeldung.lambda.dynamodb.bean.PersonResponse;
public class SavePersonHandler implements RequestHandler<PersonRequest, PersonResponse> {
private DynamoDB dynamoDb;
private String DYNAMODB_TABLE_NAME = "Person";
private Regions REGION = Regions.US_WEST_2;
public PersonResponse handleRequest(PersonRequest personRequest, Context context) {
this.initDynamoDbClient();
persistData(personRequest);
PersonResponse personResponse = new PersonResponse();
personResponse.setMessage("Saved Successfully!!!");
return personResponse;
}
private PutItemOutcome persistData(PersonRequest personRequest) throws ConditionalCheckFailedException {
return this.dynamoDb.getTable(DYNAMODB_TABLE_NAME)
.putItem(
new PutItemSpec().withItem(new Item()
.withNumber("id", personRequest.getId())
.withString("firstName", personRequest.getFirstName())
.withString("lastName", personRequest.getLastName())
.withNumber("age", personRequest.getAge())
.withString("address", personRequest.getAddress())));
}
private void initDynamoDbClient() {
AmazonDynamoDBClient client = new AmazonDynamoDBClient();
client.setRegion(Region.getRegion(REGION));
this.dynamoDb = new DynamoDB(client);
}
}

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aws/src/main/java/com/baeldung/lambda/dynamodb/bean/PersonRequest.java Normal file
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package com.baeldung.lambda.dynamodb.bean;
import com.google.gson.Gson;
import com.google.gson.GsonBuilder;
public class PersonRequest {
private int id;
private String firstName;
private String lastName;
private int age;
private String address;
public static void main(String[] args) {
PersonRequest personRequest = new PersonRequest();
personRequest.setId(1);
personRequest.setFirstName("John");
personRequest.setLastName("Doe");
personRequest.setAge(30);
personRequest.setAddress("United States");
System.out.println(personRequest);
}
public String toString() {
final Gson gson = new GsonBuilder().setPrettyPrinting().create();
return gson.toJson(this);
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getFirstName() {
return firstName;
}
public void setFirstName(String firstName) {
this.firstName = firstName;
}
public String getLastName() {
return lastName;
}
public void setLastName(String lastName) {
this.lastName = lastName;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
public String getAddress() {
return address;
}
public void setAddress(String address) {
this.address = address;
}
}

20
aws/src/main/java/com/baeldung/lambda/dynamodb/bean/PersonResponse.java Normal file
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package com.baeldung.lambda.dynamodb.bean;
import com.google.gson.Gson;
public class PersonResponse {
private String message;
public String toString() {
final Gson gson = new Gson();
return gson.toJson(this);
}
public String getMessage() {
return message;
}
public void setMessage(String message) {
this.message = message;
}
}

2
core-java-9/README.md
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@ -6,3 +6,5 @@
### Relevant Articles:
- [Java 9 Stream API Improvements](http://www.baeldung.com/java-9-stream-api)
- [Java 9 Convenience Factory Methods for Collections](http://www.baeldung.com/java-9-collections-factory-methods)
- [New Stream Collectors in Java 9](http://www.baeldung.com/java9-stream-collectors)

9
core-java-9/pom.xml
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@ -21,6 +21,11 @@
<artifactId>slf4j-api</artifactId>
<version>${org.slf4j.version}</version>
</dependency>
<dependency>
<groupId>ch.qos.logback</groupId>
<artifactId>logback-classic</artifactId>
<version>${ch.qos.logback.version}</version>
</dependency>
<dependency>
<groupId>org.hamcrest</groupId>
@ -76,9 +81,9 @@
<!-- logging -->
<org.slf4j.version>1.7.21</org.slf4j.version>
<ch.qos.logback.version>1.2.1</ch.qos.logback.version>
<!-- maven plugins -->
<maven-compiler-plugin.version>3.6-jigsaw-SNAPSHOT</maven-compiler-plugin.version>
<maven-compiler-plugin.version>3.6.0</maven-compiler-plugin.version>
<maven-surefire-plugin.version>2.19.1</maven-surefire-plugin.version>
<!-- testing -->

133
core-java-9/src/test/java/com/baeldung/java9/process/ProcessAPIEnhancementsTest.java Normal file
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@ -0,0 +1,133 @@
package com.baeldung.java9.process;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.assertTrue;
import java.io.IOException;
import java.util.concurrent.CompletableFuture;
import java.util.stream.Stream;
import org.junit.Test;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Created by sanaulla on 2/23/2017.
*/
public class ProcessAPIEnhancementsTest {
Logger log = LoggerFactory.getLogger(ProcessAPIEnhancementsTest.class);
@Test
public void givenCurrentProcess_whenInvokeGetInfo_thenSuccess() throws IOException {
ProcessHandle processHandle = ProcessHandle.current();
ProcessHandle.Info processInfo = processHandle.info();
assertNotNull(processHandle.getPid());
assertEquals(false, processInfo.arguments()
.isPresent());
assertEquals(true, processInfo.command()
.isPresent());
assertTrue(processInfo.command()
.get()
.contains("java"));
assertEquals(true, processInfo.startInstant()
.isPresent());
assertEquals(true, processInfo.totalCpuDuration()
.isPresent());
assertEquals(true, processInfo.user()
.isPresent());
}
@Test
public void givenSpawnProcess_whenInvokeGetInfo_thenSuccess() throws IOException {
String javaCmd = ProcessUtils.getJavaCmd()
.getAbsolutePath();
ProcessBuilder processBuilder = new ProcessBuilder(javaCmd, "-version");
Process process = processBuilder.inheritIO()
.start();
ProcessHandle processHandle = process.toHandle();
ProcessHandle.Info processInfo = processHandle.info();
assertNotNull(processHandle.getPid());
assertEquals(false, processInfo.arguments()
.isPresent());
assertEquals(true, processInfo.command()
.isPresent());
assertTrue(processInfo.command()
.get()
.contains("java"));
assertEquals(true, processInfo.startInstant()
.isPresent());
assertEquals(true, processInfo.totalCpuDuration()
.isPresent());
assertEquals(true, processInfo.user()
.isPresent());
}
@Test
public void givenLiveProcesses_whenInvokeGetInfo_thenSuccess() {
Stream<ProcessHandle> liveProcesses = ProcessHandle.allProcesses();
liveProcesses.filter(ProcessHandle::isAlive)
.forEach(ph -> {
assertNotNull(ph.getPid());
assertEquals(true, ph.info()
.command()
.isPresent());
assertEquals(true, ph.info()
.startInstant()
.isPresent());
assertEquals(true, ph.info()
.totalCpuDuration()
.isPresent());
assertEquals(true, ph.info()
.user()
.isPresent());
});
}
@Test
public void givenProcess_whenGetChildProcess_thenSuccess() throws IOException {
int childProcessCount = 5;
for (int i = 0; i < childProcessCount; i++) {
String javaCmd = ProcessUtils.getJavaCmd()
.getAbsolutePath();
ProcessBuilder processBuilder
= new ProcessBuilder(javaCmd, "-version");
processBuilder.inheritIO().start();
}
Stream<ProcessHandle> children = ProcessHandle.current()
.children();
children.filter(ProcessHandle::isAlive)
.forEach(ph -> log.info("PID: {}, Cmd: {}", ph.getPid(), ph.info()
.command()));
Stream<ProcessHandle> descendants = ProcessHandle.current()
.descendants();
descendants.filter(ProcessHandle::isAlive)
.forEach(ph -> log.info("PID: {}, Cmd: {}", ph.getPid(), ph.info()
.command()));
}
@Test
public void givenProcess_whenAddExitCallback_thenSuccess() throws Exception {
String javaCmd = ProcessUtils.getJavaCmd()
.getAbsolutePath();
ProcessBuilder processBuilder
= new ProcessBuilder(javaCmd, "-version");
Process process = processBuilder.inheritIO()
.start();
ProcessHandle processHandle = process.toHandle();
log.info("PID: {} has started", processHandle.getPid());
CompletableFuture<ProcessHandle> onProcessExit = processHandle.onExit();
onProcessExit.get();
assertEquals(false, processHandle.isAlive());
onProcessExit.thenAccept(ph -> {
log.info("PID: {} has stopped", ph.getPid());
});
}
}

0
core-java/0.004102810554955205 Normal file
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core-java/0.04832801936270381 Normal file
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0
core-java/0.5633433244738808 Normal file
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0
core-java/0.6256429734439612 Normal file
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0
core-java/0.9799201796740292 Normal file
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21
core-java/README.md
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@ -58,3 +58,24 @@
- [Guide to java.util.concurrent.BlockingQueue](http://www.baeldung.com/java-blocking-queue)
- [Guide to CountDownLatch in Java](http://www.baeldung.com/java-countdown-latch)
- [How to Design a Genetic Algorithm in Java](http://www.baeldung.com/java-genetic-algorithm)
- [A Guide to ConcurrentMap](http://www.baeldung.com/java-concurrent-map)
- [Guide to PriorityBlockingQueue in Java](http://www.baeldung.com/java-priority-blocking-queue)
- [Guide to Java 8 groupingBy Collector](http://www.baeldung.com/java-groupingby-collector)
- [Avoiding the ConcurrentModificationException in Java](http://www.baeldung.com/java-concurrentmodificationexception)
- [Guide to WeakHashMap in Java](http://www.baeldung.com/java-weakhashmap)
- [Strategy Design Pattern in Java 8](http://www.baeldung.com/java-strategy-pattern)
- [Java 8 and Infinite Streams](http://www.baeldung.com/java-inifinite-streams)
- [Custom Thread Pools In Java 8 Parallel Streams](http://www.baeldung.com/java-8-parallel-streams-custom-threadpool)
- [String Operations with Java Streams](http://www.baeldung.com/java-stream-operations-on-strings)
- [Spring Security – Cache Control Headers](http://www.baeldung.com/spring-security-cache-control-headers)
- [Basic Introduction to JMX](http://www.baeldung.com/java-management-extensions)
- [AWS Lambda With Java](http://www.baeldung.com/java-aws-lambda)
- [Introduction to Nashorn](http://www.baeldung.com/java-nashorn)
- [Exceptions in Java 8 Lambda Expressions](http://www.baeldung.com/java-lambda-exceptions)
- [Guide to the Guava BiMap](http://www.baeldung.com/guava-bimap)
- [Iterable to Stream in Java](http://www.baeldung.com/java-iterable-to-stream)
- [Java 8 Stream findFirst() vs. findAny()](http://www.baeldung.com/java-stream-findfirst-vs-findany)
- [Chained Exceptions in Java](http://www.baeldung.com/java-chained-exceptions)
- [The Java HashMap Under the Hood](http://www.baeldung.com/java-hashmap)
- [A Guide to LinkedHashMap in Java](http://www.baeldung.com/java-linked-hashmap)
- [A Guide to TreeMap in Java](http://www.baeldung.com/java-treemap)

8
core-java/src/main/java/com/baeldung/algorithms/RunAlgorithm.java
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@ -2,7 +2,8 @@ package com.baeldung.algorithms;
import java.util.Scanner;
import com.baeldung.algorithms.annealing.SimulatedAnnealing;
import com.baeldung.algorithms.ga.annealing.SimulatedAnnealing;
import com.baeldung.algorithms.ga.ant_colony.AntColonyOptimization;
import com.baeldung.algorithms.ga.binary.SimpleGeneticAlgorithm;
import com.baeldung.algorithms.slope_one.SlopeOne;
@ -14,6 +15,7 @@ public class RunAlgorithm {
System.out.println("1 - Simulated Annealing");
System.out.println("2 - Slope One");
System.out.println("3 - Simple Genetic Algorithm");
System.out.println("4 - Ant Colony");
int decision = in.nextInt();
switch (decision) {
case 1:
@ -27,6 +29,10 @@ public class RunAlgorithm {
SimpleGeneticAlgorithm ga = new SimpleGeneticAlgorithm();
ga.runAlgorithm(50, "1011000100000100010000100000100111001000000100000100000000001111");
break;
case 4:
AntColonyOptimization antColony = new AntColonyOptimization(21);
antColony.startAntOptimization();
break;
default:
System.out.println("Unknown option");
break;

2
core-java/src/main/java/com/baeldung/algorithms/annealing/City.java → core-java/src/main/java/com/baeldung/algorithms/ga/annealing/City.java
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@ -1,4 +1,4 @@
package com.baeldung.algorithms.annealing;
package com.baeldung.algorithms.ga.annealing;
import lombok.Data;

2
core-java/src/main/java/com/baeldung/algorithms/annealing/SimulatedAnnealing.java → core-java/src/main/java/com/baeldung/algorithms/ga/annealing/SimulatedAnnealing.java
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@ -1,4 +1,4 @@
package com.baeldung.algorithms.annealing;
package com.baeldung.algorithms.ga.annealing;
public class SimulatedAnnealing {

2
core-java/src/main/java/com/baeldung/algorithms/annealing/Travel.java → core-java/src/main/java/com/baeldung/algorithms/ga/annealing/Travel.java
View File

@ -1,4 +1,4 @@
package com.baeldung.algorithms.annealing;
package com.baeldung.algorithms.ga.annealing;
import java.util.ArrayList;
import java.util.Collections;

37
core-java/src/main/java/com/baeldung/algorithms/ga/ant_colony/Ant.java Normal file
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@ -0,0 +1,37 @@
package com.baeldung.algorithms.ga.ant_colony;
public class Ant {
protected int trailSize;
protected int trail[];
protected boolean visited[];
public Ant(int tourSize) {
this.trailSize = tourSize;
this.trail = new int[tourSize];
this.visited = new boolean[tourSize];
}
protected void visitCity(int currentIndex, int city) {
trail[currentIndex + 1] = city;
visited[city] = true;
}
protected boolean visited(int i) {
return visited[i];
}
protected double trailLength(double graph[][]) {
double length = graph[trail[trailSize - 1]][trail[0]];
for (int i = 0; i < trailSize - 1; i++) {
length += graph[trail[i]][trail[i + 1]];
}
return length;
}
protected void clear() {
for (int i = 0; i < trailSize; i++)
visited[i] = false;
}
}

212
core-java/src/main/java/com/baeldung/algorithms/ga/ant_colony/AntColonyOptimization.java Normal file
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@ -0,0 +1,212 @@
package com.baeldung.algorithms.ga.ant_colony;
import java.util.Arrays;
import java.util.Random;
public class AntColonyOptimization {
private double c = 1.0;
private double alpha = 1;
private double beta = 5;
private double evaporation = 0.5;
private double Q = 500;
private double antFactor = 0.8;
private double randomFactor = 0.01;
private int maxIterations = 1000;
public int numberOfCities;
public int numberOfAnts;
private double graph[][];
private double trails[][];
private Ant ants[];
private Random random = new Random();
private double probabilities[];
private int currentIndex;
public int[] bestTourOrder;
public double bestTourLength;
public AntColonyOptimization(int noOfCities) {
graph = generateRandomMatrix(noOfCities);
numberOfCities = graph.length;
numberOfAnts = (int) (numberOfCities * antFactor);
trails = new double[numberOfCities][numberOfCities];
probabilities = new double[numberOfCities];
ants = new Ant[numberOfAnts];
for (int j = 0; j < numberOfAnts; j++) {
ants[j] = new Ant(numberOfCities);
}
}
/**
* Generate initial solution
* @param n
* @return
*/
public double[][] generateRandomMatrix(int n) {
double[][] randomMatrix = new double[n][n];
random.setSeed(System.currentTimeMillis());
for (int i = 0; i < n; i++) {
for (int j = 0; j < n; j++) {
Integer r = random.nextInt(100) + 1;
randomMatrix[i][j] = Math.abs(r);
}
}
return randomMatrix;
}
/**
* Perform ant optimization
* @return
*/
public int[] startAntOptimization() {
int[] finalResult = null;
for (int i = 1; i <= 3; i++) {
System.out.println("Attempt #" + i);
finalResult = solve();
}
return finalResult;
}
/**
* Use this method to run the main logic
* @return
*/
private int[] solve() {
setupAnts();
clearTrails();
int iteration = 0;
while (iteration < maxIterations) {
moveAnts();
updateTrails();
updateBest();
iteration++;
}
System.out.println("Best tour length: " + (bestTourLength - numberOfCities));
System.out.println("Best tour order: " + Arrays.toString(bestTourOrder));
return bestTourOrder.clone();
}
/**
* Prepare ants for the simulation
*/
private void setupAnts() {
currentIndex = -1;
for (int i = 0; i < numberOfAnts; i++) {
ants[i].clear();
ants[i].visitCity(currentIndex, random.nextInt(numberOfCities));
}
currentIndex++;
}
/**
* At each iteration, move ants
*/
private void moveAnts() {
while (currentIndex < numberOfCities - 1) {
for (Ant a : ants)
a.visitCity(currentIndex, selectNextCity(a));
currentIndex++;
}
}
/**
* Select next city for each ant
* @param ant
* @return
*/
private int selectNextCity(Ant ant) {
if (random.nextDouble() < randomFactor) {
int t = random.nextInt(numberOfCities - currentIndex);
int j = -1;
for (int i = 0; i < numberOfCities; i++) {
if (!ant.visited(i)) {
j++;
}
if (j == t) {
return i;
}
}
}
calculateProbabilities(ant);
double r = random.nextDouble();
double total = 0;
for (int i = 0; i < numberOfCities; i++) {
total += probabilities[i];
if (total >= r) {
return i;
}
}
throw new RuntimeException("There are no other cities");
}
/**
* Calculate the next city picks probabilites
* @param ant
*/
private void calculateProbabilities(Ant ant) {
int i = ant.trail[currentIndex];
double pheromone = 0.0;
for (int l = 0; l < numberOfCities; l++) {
if (!ant.visited(l)) {
pheromone += Math.pow(trails[i][l], alpha) * Math.pow(1.0 / graph[i][l], beta);
}
}
for (int j = 0; j < numberOfCities; j++) {
if (ant.visited(j)) {
probabilities[j] = 0.0;
} else {
double numerator = Math.pow(trails[i][j], alpha) * Math.pow(1.0 / graph[i][j], beta);
probabilities[j] = numerator / pheromone;
}
}
}
/**
* Update trails that ants used
*/
private void updateTrails() {
for (int i = 0; i < numberOfCities; i++) {
for (int j = 0; j < numberOfCities; j++) {
trails[i][j] *= evaporation;
}
}
for (Ant a : ants) {
double contribution = Q / a.trailLength(graph);
for (int i = 0; i < numberOfCities - 1; i++) {
trails[a.trail[i]][a.trail[i + 1]] += contribution;
}
trails[a.trail[numberOfCities - 1]][a.trail[0]] += contribution;
}
}
/**
* Update the best solution
*/
private void updateBest() {
if (bestTourOrder == null) {
bestTourOrder = ants[0].trail;
bestTourLength = ants[0].trailLength(graph);
}
for (Ant a : ants) {
if (a.trailLength(graph) < bestTourLength) {
bestTourLength = a.trailLength(graph);
bestTourOrder = a.trail.clone();
}
}
}
/**
* Clear trails after simulation
*/
private void clearTrails() {
for (int i = 0; i < numberOfCities; i++)
for (int j = 0; j < numberOfCities; j++)
trails[i][j] = c;
}
}

83
core-java/src/main/java/com/baeldung/concurrent/locks/ReentrantLockWithCondition.java Normal file
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@ -0,0 +1,83 @@
package com.baeldung.concurrent.locks;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.util.Stack;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.locks.Condition;
import java.util.concurrent.locks.ReentrantLock;
import static java.lang.Thread.sleep;
public class ReentrantLockWithCondition {
static Logger logger = LoggerFactory.getLogger(ReentrantLockWithCondition.class);
Stack<String> stack = new Stack<>();
int CAPACITY = 5;
ReentrantLock lock = new ReentrantLock();
Condition stackEmptyCondition = lock.newCondition();
Condition stackFullCondition = lock.newCondition();
public void pushToStack(String item) throws InterruptedException {
try {
lock.lock();
if (stack.size() == CAPACITY) {
logger.info(Thread.currentThread().getName() + " wait on stack full");
stackFullCondition.await();
}
logger.info("Pushing the item " + item);
stack.push(item);
stackEmptyCondition.signalAll();
} finally {
lock.unlock();
}
}
public String popFromStack() throws InterruptedException {
try {
lock.lock();
if (stack.size() == 0) {
logger.info(Thread.currentThread().getName() + " wait on stack empty");
stackEmptyCondition.await();
}
return stack.pop();
} finally {
stackFullCondition.signalAll();
lock.unlock();
}
}
public static void main(String[] args) {
final int threadCount = 2;
ReentrantLockWithCondition object = new ReentrantLockWithCondition();
final ExecutorService service = Executors.newFixedThreadPool(threadCount);
service.execute(() -> {
for (int i = 0; i < 10; i++) {
try {
object.pushToStack("Item " + i);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
});
service.execute(() -> {
for (int i = 0; i < 10; i++) {
try {
logger.info("Item popped " + object.popFromStack());
} catch (InterruptedException e) {
e.printStackTrace();
}
}
});
service.shutdown();
}
}

92
core-java/src/main/java/com/baeldung/concurrent/locks/SharedObjectWithLock.java Normal file
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@ -0,0 +1,92 @@
package com.baeldung.concurrent.locks;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.locks.ReentrantLock;
import static java.lang.Thread.sleep;
public class SharedObjectWithLock {
Logger logger = LoggerFactory.getLogger(SharedObjectWithLock.class);
ReentrantLock lock = new ReentrantLock(true);
int counter = 0;
public void perform() {
lock.lock();
logger.info("Thread - " + Thread.currentThread().getName() + " acquired the lock");
try {
logger.info("Thread - " + Thread.currentThread().getName() + " processing");
counter++;
} catch (Exception exception) {
logger.error(" Interrupted Exception ", exception);
} finally {
lock.unlock();
logger.info("Thread - " + Thread.currentThread().getName() + " released the lock");
}
}
public void performTryLock() {
logger.info("Thread - " + Thread.currentThread().getName() + " attempting to acquire the lock");
try {
boolean isLockAcquired = lock.tryLock(2, TimeUnit.SECONDS);
if (isLockAcquired) {
try {
logger.info("Thread - " + Thread.currentThread().getName() + " acquired the lock");
logger.info("Thread - " + Thread.currentThread().getName() + " processing");
sleep(1000);
} finally {
lock.unlock();
logger.info("Thread - " + Thread.currentThread().getName() + " released the lock");
}
}
} catch (InterruptedException exception) {
logger.error(" Interrupted Exception ", exception);
}
logger.info("Thread - " + Thread.currentThread().getName() + " could not acquire the lock");
}
public ReentrantLock getLock() {
return lock;
}
boolean isLocked() {
return lock.isLocked();
}
boolean hasQueuedThreads() {
return lock.hasQueuedThreads();
}
int getCounter() {
return counter;
}
public static void main(String[] args) {
final int threadCount = 2;
final ExecutorService service = Executors.newFixedThreadPool(threadCount);
final SharedObjectWithLock object = new SharedObjectWithLock();
service.execute(() -> {
object.perform();
});
service.execute(() -> {
object.performTryLock();
});
service.shutdown();
}
}

104
core-java/src/main/java/com/baeldung/concurrent/locks/StampedLockDemo.java Normal file
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@ -0,0 +1,104 @@
package com.baeldung.concurrent.locks;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.locks.StampedLock;
import static java.lang.Thread.sleep;
public class StampedLockDemo {
Map<String, String> map = new HashMap<>();
Logger logger = LoggerFactory.getLogger(StampedLockDemo.class);
private final StampedLock lock = new StampedLock();
public void put(String key, String value) throws InterruptedException {
long stamp = lock.writeLock();
try {
logger.info(Thread.currentThread().getName() + " acquired the write lock with stamp " + stamp);
map.put(key, value);
} finally {
lock.unlockWrite(stamp);
logger.info(Thread.currentThread().getName() + " unlocked the write lock with stamp " + stamp);
}
}
public String get(String key) throws InterruptedException {
long stamp = lock.readLock();
logger.info(Thread.currentThread().getName() + " acquired the read lock with stamp " + stamp);
try {
sleep(5000);
return map.get(key);
} finally {
lock.unlockRead(stamp);
logger.info(Thread.currentThread().getName() + " unlocked the read lock with stamp " + stamp);
}
}
public String readWithOptimisticLock(String key) throws InterruptedException {
long stamp = lock.tryOptimisticRead();
String value = map.get(key);
if (!lock.validate(stamp)) {
stamp = lock.readLock();
try {
sleep(5000);
return map.get(key);
} finally {
lock.unlock(stamp);
logger.info(Thread.currentThread().getName() + " unlocked the read lock with stamp " + stamp);
}
}
return value;
}
public static void main(String[] args) {
final int threadCount = 4;
final ExecutorService service = Executors.newFixedThreadPool(threadCount);
StampedLockDemo object = new StampedLockDemo();
Runnable writeTask = () -> {
try {
object.put("key1", "value1");
} catch (InterruptedException e) {
e.printStackTrace();
}
};
Runnable readTask = () -> {
try {
object.get("key1");
} catch (InterruptedException e) {
e.printStackTrace();
}
};
Runnable readOptimisticTask = () -> {
try {
object.readWithOptimisticLock("key1");
} catch (InterruptedException e) {
e.printStackTrace();
}
};
service.submit(writeTask);
service.submit(writeTask);
service.submit(readTask);
service.submit(readOptimisticTask);
service.shutdown();
}
}

120
core-java/src/main/java/com/baeldung/concurrent/locks/SynchronizedHashMapWithRWLock.java Normal file
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@ -0,0 +1,120 @@
package com.baeldung.concurrent.locks;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReadWriteLock;
import java.util.concurrent.locks.ReentrantReadWriteLock;
import static java.lang.Thread.sleep;
public class SynchronizedHashMapWithRWLock {
static Map<String, String> syncHashMap = new HashMap<>();
Logger logger = LoggerFactory.getLogger(SynchronizedHashMapWithRWLock.class);
private final ReadWriteLock lock = new ReentrantReadWriteLock();
private final Lock readLock = lock.readLock();
private final Lock writeLock = lock.writeLock();
public void put(String key, String value) throws InterruptedException {
try {
writeLock.lock();
logger.info(Thread.currentThread().getName() + " writing");
syncHashMap.put(key, value);
sleep(1000);
} finally {
writeLock.unlock();
}
}
public String get(String key) {
try {
readLock.lock();
logger.info(Thread.currentThread().getName() + " reading");
return syncHashMap.get(key);
} finally {
readLock.unlock();
}
}
public String remove(String key) {
try {
writeLock.lock();
return syncHashMap.remove(key);
} finally {
writeLock.unlock();
}
}
public boolean containsKey(String key) {
try {
readLock.lock();
return syncHashMap.containsKey(key);
} finally {
readLock.unlock();
}
}
boolean isReadLockAvailable() {
return readLock.tryLock();
}
public static void main(String[] args) throws InterruptedException {
final int threadCount = 3;
final ExecutorService service = Executors.newFixedThreadPool(threadCount);
SynchronizedHashMapWithRWLock object = new SynchronizedHashMapWithRWLock();
service.execute(new Thread(new Writer(object), "Writer"));
service.execute(new Thread(new Reader(object), "Reader1"));
service.execute(new Thread(new Reader(object), "Reader2"));
service.shutdown();
}
private static class Reader implements Runnable {
SynchronizedHashMapWithRWLock object;
public Reader(SynchronizedHashMapWithRWLock object) {
this.object = object;
}
@Override
public void run() {
for (int i = 0; i < 10; i++) {
object.get("key" + i);
}
}
}
private static class Writer implements Runnable {
SynchronizedHashMapWithRWLock object;
public Writer(SynchronizedHashMapWithRWLock object) {
this.object = object;
}
@Override
public void run() {
for (int i = 0; i < 10; i++) {
try {
object.put("key" + i, "value" + i);
sleep(1000);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
}
}

18
core-java/src/main/java/com/baeldung/list/listoflist/Pen.java Normal file
View File

@ -0,0 +1,18 @@
package com.baeldung.list.listoflist;
public class Pen implements Stationery {
public String name;
public Pen(String name) {
this.name = name;
}
public void setName(String name) {
this.name = name;
}
public String getName() {
return this.name;
}
}

18
core-java/src/main/java/com/baeldung/list/listoflist/Pencil.java Normal file
View File

@ -0,0 +1,18 @@
package com.baeldung.list.listoflist;
public class Pencil implements Stationery{
public String name;
public Pencil(String name) {
this.name = name;
}
public void setName(String name) {
this.name = name;
}
public String getName() {
return this.name;
}
}

18
core-java/src/main/java/com/baeldung/list/listoflist/Rubber.java Normal file
View File

@ -0,0 +1,18 @@
package com.baeldung.list.listoflist;
public class Rubber implements Stationery {
public String name;
public Rubber(String name) {
this.name = name;
}
public void setName(String name) {
this.name = name;
}
public String getName() {
return this.name;
}
}

5
core-java/src/main/java/com/baeldung/list/listoflist/Stationery.java Normal file
View File

@ -0,0 +1,5 @@
package com.baeldung.list.listoflist;
public interface Stationery {
}

22
core-java/src/test/java/com/baeldung/algorithms/AntColonyOptimizationTest.java Normal file
View File

@ -0,0 +1,22 @@
package com.baeldung.algorithms;
import org.junit.Assert;
import org.junit.Test;
import com.baeldung.algorithms.ga.ant_colony.AntColonyOptimization;
public class AntColonyOptimizationTest {
@Test
public void testGenerateRandomMatrix() {
AntColonyOptimization antTSP = new AntColonyOptimization(5);
Assert.assertNotNull(antTSP.generateRandomMatrix(5));
}
@Test
public void testStartAntOptimization() {
AntColonyOptimization antTSP = new AntColonyOptimization(5);
Assert.assertNotNull(antTSP.startAntOptimization());
}
}

2
core-java/src/test/java/com/baeldung/algorithms/SimulatedAnnealingTest.java
View File

@ -3,7 +3,7 @@ package com.baeldung.algorithms;
import org.junit.Assert;
import org.junit.Test;
import com.baeldung.algorithms.annealing.SimulatedAnnealing;
import com.baeldung.algorithms.ga.annealing.SimulatedAnnealing;
public class SimulatedAnnealingTest {

75
core-java/src/test/java/com/baeldung/concurrent/locks/SharedObjectWithLockManualTest.java Normal file
View File

@ -0,0 +1,75 @@
package com.baeldung.concurrent.locks;
import org.junit.Test;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import static junit.framework.TestCase.assertEquals;
public class SharedObjectWithLockManualTest {
@Test
public void whenLockAcquired_ThenLockedIsTrue() {
final SharedObjectWithLock object = new SharedObjectWithLock();
final int threadCount = 2;
final ExecutorService service = Executors.newFixedThreadPool(threadCount);
executeThreads(object, threadCount, service);
assertEquals(true, object.isLocked());
service.shutdown();
}
@Test
public void whenLocked_ThenQueuedThread() {
final int threadCount = 4;
final ExecutorService service = Executors.newFixedThreadPool(threadCount);
final SharedObjectWithLock object = new SharedObjectWithLock();
executeThreads(object, threadCount, service);
assertEquals(object.hasQueuedThreads(), true);
service.shutdown();
}
public void whenTryLock_ThenQueuedThread() {
final SharedObjectWithLock object = new SharedObjectWithLock();
final int threadCount = 2;
final ExecutorService service = Executors.newFixedThreadPool(threadCount);
executeThreads(object, threadCount, service);
assertEquals(true, object.isLocked());
service.shutdown();
}
@Test
public void whenGetCount_ThenCorrectCount() throws InterruptedException {
final int threadCount = 4;
final ExecutorService service = Executors.newFixedThreadPool(threadCount);
final SharedObjectWithLock object = new SharedObjectWithLock();
executeThreads(object, threadCount, service);
Thread.sleep(1000);
assertEquals(object.getCounter(), 4);
service.shutdown();
}
private void executeThreads(SharedObjectWithLock object, int threadCount, ExecutorService service) {
for (int i = 0; i < threadCount; i++) {
service.execute(() -> {
object.perform();
});
}
}
}

58
core-java/src/test/java/com/baeldung/concurrent/locks/SynchronizedHashMapWithRWLockManualTest.java Normal file
View File

@ -0,0 +1,58 @@
package com.baeldung.concurrent.locks;
import jdk.nashorn.internal.ir.annotations.Ignore;
import org.junit.Test;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import static junit.framework.TestCase.assertEquals;
public class SynchronizedHashMapWithRWLockManualTest {
@Test
public void whenWriting_ThenNoReading() {
SynchronizedHashMapWithRWLock object = new SynchronizedHashMapWithRWLock();
final int threadCount = 3;
final ExecutorService service = Executors.newFixedThreadPool(threadCount);
executeWriterThreads(object, threadCount, service);
assertEquals(object.isReadLockAvailable(), false);
service.shutdown();
}
@Test
public void whenReading_ThenMultipleReadingAllowed() {
SynchronizedHashMapWithRWLock object = new SynchronizedHashMapWithRWLock();
final int threadCount = 5;
final ExecutorService service = Executors.newFixedThreadPool(threadCount);
executeReaderThreads(object, threadCount, service);
assertEquals(object.isReadLockAvailable(), true);
service.shutdown();
}
private void executeWriterThreads(SynchronizedHashMapWithRWLock object, int threadCount, ExecutorService service) {
for (int i = 0; i < threadCount; i++) {
service.execute(() -> {
try {
object.put("key" + threadCount, "value" + threadCount);
} catch (InterruptedException e) {
e.printStackTrace();
}
});
}
}
private void executeReaderThreads(SynchronizedHashMapWithRWLock object, int threadCount, ExecutorService service) {
for (int i = 0; i < threadCount; i++)
service.execute(() -> {
object.get("key" + threadCount);
});
}
}

2
core-java/src/test/java/com/baeldung/java/map/README.md
View File

@ -1,2 +0,0 @@
### Relevant Articles:
- [The Java HashMap Under the Hood](http://www.baeldung.com/java-hashmap)

4
core-java/src/test/java/com/baeldung/test/comparison/DivisibilityTest.java → core-java/src/test/java/com/baeldung/junit4vstestng/DivisibilityTest.java
View File

@ -1,4 +1,4 @@
package com.baeldung.test.comparison;
package com.baeldung.junit4vstestng;
import static org.junit.Assert.assertEquals;
@ -15,7 +15,7 @@ public class DivisibilityTest {
}
@Test
public void givenNumber_whenDivisiblebyTwo_thenCorrect() {
public void givenNumber_whenDivisibleByTwo_thenCorrect() {
assertEquals(number % 2, 0);
}
}

34
core-java/src/test/java/com/baeldung/junit4vstestng/ParametrizedTests.java Normal file
View File

@ -0,0 +1,34 @@
package com.baeldung.junit4vstestng;
import org.junit.Assert;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.Parameterized;
import org.junit.runners.Parameterized.Parameters;
import java.util.Arrays;
import java.util.Collection;
@RunWith(value = Parameterized.class)
public class ParametrizedTests {
private int value;
private boolean isEven;
public ParametrizedTests(int value, boolean isEven) {
this.value = value;
this.isEven = isEven;
}
@Parameters
public static Collection<Object[]> data() {
Object[][] data = new Object[][]{{1, false}, {2, true}, {4, true}};
return Arrays.asList(data);
}
@Test
public void givenParametrizedNumber_ifEvenCheckOK_thenCorrect() {
Assert.assertEquals(isEven, value % 2 == 0);
}
}

15
core-java/src/test/java/com/baeldung/junit4vstestng/RegistrationTest.java Normal file
View File

@ -0,0 +1,15 @@
package com.baeldung.junit4vstestng;
import org.junit.Test;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class RegistrationTest {
private static final Logger LOGGER = LoggerFactory.getLogger(RegistrationTest.class);
@Test
public void whenCalledFromSuite_thanOK() {
LOGGER.info("Registration successful");
}
}

14
core-java/src/test/java/com/baeldung/junit4vstestng/SignInTest.java Normal file
View File

@ -0,0 +1,14 @@
package com.baeldung.junit4vstestng;
import org.junit.Test;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class SignInTest {
private static final Logger LOGGER = LoggerFactory.getLogger(SignInTest.class);
@Test
public void whenCalledFromSuite_thanOK() {
LOGGER.info("SignIn successful");
}
}

2
core-java/src/test/java/com/baeldung/test/comparison/StringCaseTest.java → core-java/src/test/java/com/baeldung/junit4vstestng/StringCaseTest.java
View File

@ -1,4 +1,4 @@
package com.baeldung.test.comparison;
package com.baeldung.junit4vstestng;
import static org.junit.Assert.assertEquals;

4
core-java/src/test/java/com/baeldung/test/comparison/SuiteTest.java → core-java/src/test/java/com/baeldung/junit4vstestng/SuiteTest.java
View File

@ -1,10 +1,10 @@
package com.baeldung.test.comparison;
package com.baeldung.junit4vstestng;
import org.junit.runner.RunWith;
import org.junit.runners.Suite;
@RunWith(Suite.class)
@Suite.SuiteClasses({ StringCaseTest.class, DivisibilityTest.class })
@Suite.SuiteClasses({ RegistrationTest.class, SignInTest.class })
public class SuiteTest {
}

9
core-java/src/test/java/com/baeldung/test/comparison/SummationServiceTest.java → core-java/src/test/java/com/baeldung/junit4vstestng/SummationServiceTest.java
View File

@ -1,8 +1,4 @@
package com.baeldung.test.comparison;
import java.security.Security;
import java.util.ArrayList;
import java.util.List;
package com.baeldung.junit4vstestng;
import org.junit.After;
import org.junit.AfterClass;
@ -12,6 +8,9 @@ import org.junit.BeforeClass;
import org.junit.Ignore;
import org.junit.Test;
import java.util.ArrayList;
import java.util.List;
public class SummationServiceTest {
private static List<Integer> numbers;

76
core-java/src/test/java/com/baeldung/list/listoflist/ListOfListsTest.java Normal file
View File

@ -0,0 +1,76 @@
package com.baeldung.list.listoflist;
import java.util.ArrayList;
import java.util.List;
import static org.junit.Assert.assertEquals;
import org.junit.Before;
import org.junit.Test;
public class ListOfListsTest {
private List<ArrayList<? extends Stationery>> listOfLists = new ArrayList<ArrayList<? extends Stationery>>();
private ArrayList<Pen> penList = new ArrayList<>();
private ArrayList<Pencil> pencilList = new ArrayList<>();
private ArrayList<Rubber> rubberList = new ArrayList<>();
@SuppressWarnings("unchecked")
@Before
public void init() {
listOfLists.add(penList);
listOfLists.add(pencilList);
listOfLists.add(rubberList);
((ArrayList<Pen>) listOfLists.get(0)).add(new Pen("Pen 1"));
((ArrayList<Pencil>) listOfLists.get(1)).add(new Pencil("Pencil 1"));
((ArrayList<Rubber>) listOfLists.get(2)).add(new Rubber("Rubber 1"));
}
@Test
public void givenListOfLists_thenCheckNames() {
assertEquals("Pen 1", ((Pen) listOfLists.get(0)
.get(0)).getName());
assertEquals("Pencil 1", ((Pencil) listOfLists.get(1)
.get(0)).getName());
assertEquals("Rubber 1", ((Rubber) listOfLists.get(2)
.get(0)).getName());
}
@SuppressWarnings("unchecked")
@Test
public void givenListOfLists_whenRemovingElements_thenCheckNames() {
((ArrayList<Pencil>) listOfLists.get(1)).remove(0);
listOfLists.remove(1);
assertEquals("Rubber 1", ((Rubber) listOfLists.get(1)
.get(0)).getName());
listOfLists.remove(0);
assertEquals("Rubber 1", ((Rubber) listOfLists.get(0)
.get(0)).getName());
}
@Test
public void givenThreeList_whenCombineIntoOneList_thenCheckList() {
ArrayList<Pen> pens = new ArrayList<>();
pens.add(new Pen("Pen 1"));
pens.add(new Pen("Pen 2"));
ArrayList<Pencil> pencils = new ArrayList<>();
pencils.add(new Pencil("Pencil 1"));
pencils.add(new Pencil("Pencil 2"));
ArrayList<Rubber> rubbers = new ArrayList<>();
rubbers.add(new Rubber("Rubber 1"));
rubbers.add(new Rubber("Rubber 2"));
List<ArrayList<? extends Stationery>> list = new ArrayList<ArrayList<? extends Stationery>>();
list.add(pens);
list.add(pencils);
list.add(rubbers);
assertEquals("Pen 1", ((Pen) list.get(0)
.get(0)).getName());
assertEquals("Pencil 1", ((Pencil) list.get(1)
.get(0)).getName());
assertEquals("Rubber 1", ((Rubber) list.get(2)
.get(0)).getName());
}
}

5
core-java/src/test/java/com/baeldung/string/JoinerSplitterTest.java
View File

@ -12,7 +12,7 @@ import com.baeldung.string.JoinerSplitter;
public class JoinerSplitterTest {
@Test
public void givenArray_transformedToStream_convertToString() {
public void provided_array_convert_to_stream_and_convert_to_string() {
String[] programming_languages = {"java", "python", "nodejs", "ruby"};
@ -24,6 +24,7 @@ public class JoinerSplitterTest {
@Test
public void givenArray_transformedToStream_convertToPrefixPostfixString() {
String[] programming_languages = {"java", "python",
"nodejs", "ruby"};
String expectation = "[java,python,nodejs,ruby]";
@ -34,6 +35,7 @@ public class JoinerSplitterTest {
@Test
public void givenString_transformedToStream_convertToList() {
String programming_languages = "java,python,nodejs,ruby";
List<String> expectation = new ArrayList<String>();
@ -49,6 +51,7 @@ public class JoinerSplitterTest {
@Test
public void givenString_transformedToStream_convertToListOfChar() {
String programming_languages = "java,python,nodejs,ruby";
List<Character> expectation = new ArrayList<Character>();

46
core-java/src/test/java/com/baeldung/test/comparison/DependentTests.java
View File

@ -1,46 +0,0 @@
package com.baeldung.test.comparison;
import org.testng.Assert;
import org.testng.annotations.BeforeClass;
import org.testng.annotations.Test;
public class DependentTests {
private EmailValidator emailValidator;
private LoginValidator loginValidator;
private String validEmail = "abc@qwe.com";
@BeforeClass
public void setup() {
emailValidator = new EmailValidator();
loginValidator = new LoginValidator();
}
@Test
public void givenEmail_ifValid_thenTrue() {
boolean valid = emailValidator.validate(validEmail);
Assert.assertEquals(valid, true);
}
@Test(dependsOnMethods = { "givenEmail_ifValid_thenTrue" })
public void givenValidEmail_whenLoggedin_thenTrue() {
boolean valid = loginValidator.validate();
Assert.assertEquals(valid, true);
}
}
class EmailValidator {
public boolean validate(String validEmail) {
return true;
}
}
class LoginValidator {
public boolean validate() {
return true;
}
}

49
core-java/src/test/java/com/baeldung/test/comparison/MyParameterisedUnitTest.java
View File

@ -1,49 +0,0 @@
package com.baeldung.test.comparison;
import java.util.Arrays;
import java.util.Collection;
import org.junit.Assert;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.Parameterized;
import org.junit.runners.Parameterized.Parameters;
@RunWith(value = Parameterized.class)
public class MyParameterisedUnitTest {
private String name;
private NameCheck nameCheck;
@Before
public void initialSetup() {
nameCheck = new NameCheck();
}
public MyParameterisedUnitTest(String myName) {
this.name = myName;
}
@Parameters
public static Collection<Object[]> data() {
Object[][] data = new Object[][] { { "Peter" }, { "Sam" }, { "Tim" }, { "Lucy" } };
return Arrays.asList(data);
}
@Test
public void givenName_whenValidLength_thenTrue() {
boolean valid = nameCheck.nameCheck(name);
Assert.assertEquals(valid, true);
}
}
class NameCheck {
public boolean nameCheck(String name) {
if (name.length() > 0)
return true;
return false;
}
}

81
core-java/src/test/java/com/baeldung/test/comparison/MyParameterisedUnitTestNg.java
View File

@ -1,81 +0,0 @@
package com.baeldung.test.comparison;
import org.testng.Assert;
import org.testng.annotations.BeforeClass;
import org.testng.annotations.DataProvider;
import org.testng.annotations.Parameters;
import org.testng.annotations.Test;
public class MyParameterisedUnitTestNg {
private PrimeNumberCheck primeNumberChecker;
@BeforeClass
public void intialSetup() {
primeNumberChecker = new PrimeNumberCheck();
}
@Test(enabled = false)
@Parameters({ "num", "expectedResult" })
public void givenNumber_ifPrime_thenCorrect(int number, boolean expectedResult) {
Assert.assertEquals(expectedResult, primeNumberChecker.validate(number));
}
@DataProvider(name = "test1")
public static Object[][] primeNumbers() {
return new Object[][] { { 2, true }, { 6, false }, { 19, true }, { 22, false }, { 23, true } };
}
@Test(dataProvider = "test1")
public void givenNumber_whenPrime_thenCorrect(Integer inputNumber, Boolean expectedResult) {
Assert.assertEquals(expectedResult, primeNumberChecker.validate(inputNumber));
}
@Test(dataProvider = "myDataProvider")
public void parameterCheckTest(User user) {
Assert.assertEquals("sam", user.getName());
Assert.assertEquals(12, user.getAge());
}
@DataProvider(name = "myDataProvider")
public Object[][] parameterProvider() {
User usr = new User();
usr.setName("sam");
usr.setAge(12);
return new Object[][] { { usr } };
}
}
class PrimeNumberCheck {
public Object validate(int number) {
for (int i = 2; i < number; i++) {
if (number % i == 0)
return false;
}
return true;
}
}
class User {
private String name;
private int age;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
}

11
core-java/src/test/java/com/baeldung/test/comparison/RegistrationTest.java
View File

@ -1,11 +0,0 @@
package com.baeldung.test.comparison;
import org.testng.annotations.Test;
public class RegistrationTest {
@Test
public void givenEmail_ifValid_thenCorrect() {
}
}

12
core-java/src/test/java/com/baeldung/test/comparison/SignInTest.java
View File

@ -1,12 +0,0 @@
package com.baeldung.test.comparison;
import org.testng.annotations.Test;
public class SignInTest {
@Test
public void givenUsername_ifValid_thenCorrect() {
}
}

10
core-java/src/test/resources/parameterised_test.xml
View File

@ -1,10 +0,0 @@
<!DOCTYPE suite SYSTEM "http://testng.org/testng-1.0.dtd" >
<suite name="My test suite">
<test name="testing">
<parameter name="num" value="2"/>
<parameter name="expectedResult" value="true"/>
<classes>
<class name="com.baeldung.test.comparison.MyParameterisedUnitTestNg"/>
</classes>
</test>
</suite>

13
core-java/src/test/resources/test_group.xml
View File

@ -1,13 +0,0 @@
<!DOCTYPE suite SYSTEM "http://testng.org/testng-1.0.dtd" >
<suite name="regression_test">
<test name="testing">
<groups>
<run>
<include name="sanity" />
</run>
</groups>
<classes>
<class name="com.baeldung.test.comparison.SummationServiceTestTestNg" />
</classes>
</test>
</suite>

9
core-java/src/test/resources/test_suite.xml
View File

@ -1,9 +0,0 @@
<!DOCTYPE suite SYSTEM "http://testng.org/testng-1.0.dtd" >
<suite name="Evaluation_Suite">
<test name="Sanity">
<classes>
<class name="com.baeldung.test.comparison.RegistrationTest" />
<class name="com.baeldung.test.comparison.SignInTest" />
</classes>
</test>
</suite>

1
couchbase-sdk/README.md
View File

@ -4,6 +4,7 @@
- [Introduction to Couchbase SDK for Java](http://www.baeldung.com/java-couchbase-sdk)
- [Using Couchbase in a Spring Application](http://www.baeldung.com/couchbase-sdk-spring)
- [Asynchronous Batch Opereations in Couchbase](http://www.baeldung.com/async-batch-operations-in-couchbase)
- [Querying Couchbase with MapReduce Views](http://www.baeldung.com/couchbase-query-mapreduce-view)
### Overview
This Maven project contains the Java code for the Couchbase entities and Spring services

3
disruptor/README.md
View File

@ -0,0 +1,3 @@
## Relevant articles:
- [Concurrency with LMAX Disruptor – An Introduction](http://www.baeldung.com/lmax-disruptor-concurrency)

3
ejb/README.md Normal file
View File

@ -0,0 +1,3 @@
## Relevant articles:
- [Guide to EJB Set-up](http://www.baeldung.com/ejb-intro)

8
guava/README.md
View File

@ -16,3 +16,11 @@
- [Guava – Sets](http://www.baeldung.com/guava-sets)
- [Guava – Maps](http://www.baeldung.com/guava-maps)
- [Guava Set + Function = Map](http://www.baeldung.com/guava-set-function-map-tutorial)
- [Guide to Guava’s Ordering](http://www.baeldung.com/guava-ordering)
- [Guide to Guava’s PreConditions](http://www.baeldung.com/guava-preconditions)
- [Introduction to Guava CacheLoader](http://www.baeldung.com/guava-cacheloader)
- [Guide to Guava’s EventBus](http://www.baeldung.com/guava-eventbus)
- [Guide to Guava Multimap](http://www.baeldung.com/guava-multimap)
- [Guide to Guava RangeSet](http://www.baeldung.com/guava-rangeset)
- [Guide to Guava RangeMap](http://www.baeldung.com/guava-rangemap)
- [Guide to Guava Table](http://www.baeldung.com/guava-table)

1
httpclient/README.md
View File

@ -19,3 +19,4 @@ The "REST With Spring" Classes: http://bit.ly/restwithspring
- [Multipart Upload with HttpClient 4](http://www.baeldung.com/httpclient-multipart-upload)
- [HttpAsyncClient Tutorial](http://www.baeldung.com/httpasyncclient-tutorial)
- [HttpClient 4 Tutorial](http://www.baeldung.com/httpclient-guide)
- [Advanced HttpClient Configuration](http://www.baeldung.com/httpclient-advanced-config)

1
jackson/README.md
View File

@ -25,3 +25,4 @@ The "REST With Spring" Classes: http://bit.ly/restwithspring
- [More Jackson Annotations](http://www.baeldung.com/jackson-advanced-annotations)
- [Inheritance with Jackson](http://www.baeldung.com/jackson-inheritance)
- [Guide to @JsonFormat in Jackson](http://www.baeldung.com/jackson-jsonformat)
- [A Guide to Optional with Jackson](http://www.baeldung.com/jackson-optional)

3
java-mongodb/README.md Normal file
View File

@ -0,0 +1,3 @@
## Relevant articles:
- [A Guide to MongoDB with Java](http://www.baeldung.com/java-mongodb)

2
javaslang/README.md
View File

@ -1,2 +1,4 @@
### Relevant Articles:
- [Introduction to Javaslang](http://www.baeldung.com/javaslang)
- [Guide to Try in Javaslang](http://www.baeldung.com/javaslang-try)
- [Guide to Pattern Matching in Javaslang](http://www.baeldung.com/javaslang-pattern-matching)

1
jee7/README.md
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### Relevant Articles:
- [Scheduling in Java EE](http://www.baeldung.com/scheduling-in-java-enterprise-edition)
- [JSON Processing in Java EE 7](http://www.baeldung.com/jee7-json)

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jee7/src/main/java/com/baeldung/javaeeannotations/AccountServlet.java Normal file
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package com.baeldung.javaeeannotations;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletConfig;
import javax.servlet.ServletException;
import javax.servlet.annotation.HttpConstraint;
import javax.servlet.annotation.HttpMethodConstraint;
import javax.servlet.annotation.ServletSecurity;
import javax.servlet.annotation.WebInitParam;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
@WebServlet(
name = "BankAccountServlet",
description = "Represents a Bank Account and it's transactions",
urlPatterns = {"/account", "/bankAccount" },
initParams = { @WebInitParam(name = "type", value = "savings") }
)
@ServletSecurity(
value = @HttpConstraint(rolesAllowed = {"admin"}),
httpMethodConstraints = {@HttpMethodConstraint(value = "POST", rolesAllowed = {"admin"})}
)
public class AccountServlet extends javax.servlet.http.HttpServlet {
String accountType = null;
@Override
public void init(ServletConfig config) throws ServletException {
accountType = config.getInitParameter("type");
}
public void doGet(HttpServletRequest request, HttpServletResponse response) throws IOException {
PrintWriter writer = response.getWriter();
writer.println("<html>Hello, I am an AccountServlet!</html>");
writer.flush();
}
public void doPost(HttpServletRequest request, HttpServletResponse response) throws IOException {
double accountBalance = 1000d;
double interestRate = Double.parseDouble(request.getAttribute("interest").toString());
String paramDepositAmt = request.getParameter("dep");
double depositAmt = Double.parseDouble(paramDepositAmt);
accountBalance = accountBalance + depositAmt;
PrintWriter writer = response.getWriter();
writer.println("<html> Balance of " + accountType + " account is: " +
accountBalance + "<br> This account bares an interest rate of " + interestRate +
" % </html>");
writer.flush();
}
}

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jee7/src/main/java/com/baeldung/javaeeannotations/BankAppServletContextListener.java Normal file
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package com.baeldung.javaeeannotations;
import javax.servlet.ServletContextEvent;
import javax.servlet.ServletContextListener;
import javax.servlet.annotation.WebListener;
@WebListener
public class BankAppServletContextListener implements ServletContextListener {
public void contextInitialized(ServletContextEvent sce) {
sce.getServletContext().setAttribute("ATTR_DEFAULT_LANGUAGE", "english");
}
public void contextDestroyed(ServletContextEvent sce) {
System.out.println("CONTEXT DESTROYED");
}
}

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jee7/src/main/java/com/baeldung/javaeeannotations/LoggingFilter.java Normal file
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package com.baeldung.javaeeannotations;
import java.io.IOException;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
@WebFilter(
urlPatterns = "/bankAccount/*",
filterName = "LoggingFilter",
description = "Filter all account transaction URLs"
)
public class LoggingFilter implements javax.servlet.Filter {
@Override
public void init(FilterConfig filterConfig) throws ServletException {
}
public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
HttpServletRequest req = (HttpServletRequest) request;
HttpServletResponse res = (HttpServletResponse) response;
res.sendRedirect(req.getContextPath() + "/login.jsp");
chain.doFilter(request, response);
}
@Override
public void destroy() {
}
}

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jee7/src/main/java/com/baeldung/javaeeannotations/UploadCustomerDocumentsServlet.java Normal file
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package com.baeldung.javaeeannotations;
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.annotation.MultipartConfig;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.Part;
@WebServlet(urlPatterns = { "/uploadCustDocs" })
@MultipartConfig(
fileSizeThreshold = 1024 * 1024 * 20,
maxFileSize = 1024 * 1024 * 20,
maxRequestSize = 1024 * 1024 * 25,
location = "D:/custDocs"
)
public class UploadCustomerDocumentsServlet extends HttpServlet {
protected void doPost(
HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
for (Part part : request.getParts()) {
part.write("myFile");
}
}
}

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<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee
http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" version="3.1">
<login-config>
<auth-method>BASIC</auth-method>
<realm-name>default</realm-name>
</login-config>
</web-app>

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<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>My Account</title>
</head>
<body>
<form action="account" method="post">
Width: <input type="text" size="5" name="dep"/>
&nbsp;&nbsp;
<input type="submit" value="Deposit" />
</form>
</body>
</html>

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<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Login</title>
</head>
<body>
Login Here...
</body>
</html>

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<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Insert title here</title>
</head>
<body>
<form action="uploadCustDocs" method="post" enctype="multipart/form-data">
<input type="file" name="file" size="50" />
<br />
<input type="submit" value="Upload File" />
</form>
</body>
</html>

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<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<parent>
<artifactId>parent-modules</artifactId>
<groupId>com.baeldung</groupId>
<version>1.0.0-SNAPSHOT</version>
</parent>
<modelVersion>4.0.0</modelVersion>
<artifactId>jooq</artifactId>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<configuration>
<source>1.8</source>
<target>1.8</target>
</configuration>
</plugin>
</plugins>
</build>
<dependencies>
<dependency>
<groupId>org.jooq</groupId>
<artifactId>jool</artifactId>
<version>${jool.version}</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>${junit.version}</version>
<scope>test</scope>
</dependency>
</dependencies>
<properties>
<jool.version>0.9.12</jool.version>
<junit.version>4.12</junit.version>
</properties>
</project>

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jooq/src/test/java/com/baeldung/JOOLTest.java Normal file
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package com.baeldung;
import junit.framework.Assert;
import org.jooq.lambda.Seq;
import org.jooq.lambda.Unchecked;
import org.jooq.lambda.function.Function1;
import org.jooq.lambda.function.Function2;
import org.jooq.lambda.tuple.Tuple;
import org.jooq.lambda.tuple.Tuple2;
import org.jooq.lambda.tuple.Tuple3;
import org.jooq.lambda.tuple.Tuple4;
import org.junit.Test;
import java.util.Arrays;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;
import java.util.stream.Stream;
import static junit.framework.Assert.assertTrue;
import static junit.framework.TestCase.assertEquals;
import static org.jooq.lambda.tuple.Tuple.tuple;
public class JOOLTest {
@Test
public void givenSeq_whenCheckContains_shouldReturnTrue() {
List<Integer> concat = Seq.of(1, 2, 3).concat(Seq.of(4, 5, 6)).toList();
assertEquals(concat, Arrays.asList(1, 2, 3, 4, 5, 6));
assertTrue(Seq.of(1, 2, 3, 4).contains(2));
assertTrue(Seq.of(1, 2, 3, 4).containsAll(2, 3));
assertTrue(Seq.of(1, 2, 3, 4).containsAny(2, 5));
}
@Test
public void givenStreams_whenJoin_shouldHaveElementsFromTwoStreams() {
//given
Stream<Integer> left = Stream.of(1, 2, 4);
Stream<Integer> right = Stream.of(1, 2, 3);
//when
List<Integer> rightCollected = right.collect(Collectors.toList());
List<Integer> collect = left.filter(rightCollected::contains).collect(Collectors.toList());
//then
assertEquals(collect, Arrays.asList(1, 2));
}
@Test
public void givenSeq_whenJoin_shouldHaveElementsFromBothSeq() {
assertEquals(
Seq.of(1, 2, 4).innerJoin(Seq.of(1, 2, 3), (a, b) -> a == b).toList(),
Arrays.asList(tuple(1, 1), tuple(2, 2))
);
assertEquals(
Seq.of(1, 2, 4).leftOuterJoin(Seq.of(1, 2, 3), (a, b) -> a == b).toList(),
Arrays.asList(tuple(1, 1), tuple(2, 2), tuple(4, null))
);
assertEquals(
Seq.of(1, 2, 4).rightOuterJoin(Seq.of(1, 2, 3), (a, b) -> a == b).toList(),
Arrays.asList(tuple(1, 1), tuple(2, 2), tuple(null, 3))
);
assertEquals(
Seq.of(1, 2).crossJoin(Seq.of("A", "B")).toList(),
Arrays.asList(tuple(1, "A"), tuple(1, "B"), tuple(2, "A"), tuple(2, "B"))
);
}
@Test
public void givenSeq_whenManipulateSeq_seqShouldHaveNewElementsInIt() {
assertEquals(
Seq.of(1, 2, 3).cycle().limit(9).toList(),
Arrays.asList(1, 2, 3, 1, 2, 3, 1, 2, 3)
);
assertEquals(
Seq.of(1, 2, 3).duplicate().map((first, second) -> tuple(first.toList(), second.toList())),
tuple(Arrays.asList(1, 2, 3), Arrays.asList(1, 2, 3))
);
assertEquals(
Seq.of(1, 2, 3, 4).intersperse(0).toList(),
Arrays.asList(1, 0, 2, 0, 3, 0, 4)
);
assertEquals(
Seq.of(1, 2, 3, 4, 5).shuffle().toList().size(),
5
);
assertEquals(
Seq.of(1, 2, 3, 4).partition(i -> i > 2).map((first, second) -> tuple(first.toList(), second.toList())),
tuple(Arrays.asList(3, 4), Arrays.asList(1, 2))
);
assertEquals(
Seq.of(1, 2, 3, 4).reverse().toList(),
Arrays.asList(4, 3, 2, 1)
);
}
@Test
public void givenSeq_whenGroupByAndFold_shouldReturnProperSeq() {
Map<Integer, List<Integer>> expectedAfterGroupBy = new HashMap<>();
expectedAfterGroupBy.put(1, Arrays.asList(1, 3));
expectedAfterGroupBy.put(0, Arrays.asList(2, 4));
assertEquals(
Seq.of(1, 2, 3, 4).groupBy(i -> i % 2),
expectedAfterGroupBy
);
assertEquals(
Seq.of("a", "b", "c").foldLeft("!", (u, t) -> u + t),
"!abc"
);
assertEquals(
Seq.of("a", "b", "c").foldRight("!", (t, u) -> t + u),
"abc!"
);
}
@Test
public void givenSeq_whenUsingSeqWhile_shouldBehaveAsWhileLoop() {
assertEquals(
Seq.of(1, 2, 3, 4, 5).skipWhile(i -> i < 3).toList(),
Arrays.asList(3, 4, 5)
);
assertEquals(
Seq.of(1, 2, 3, 4, 5).skipUntil(i -> i == 3).toList(),
Arrays.asList(3, 4, 5)
);
}
@Test
public void givenSeq_whenZip_shouldHaveZippedSeq() {
assertEquals(
Seq.of(1, 2, 3).zip(Seq.of("a", "b", "c")).toList(),
Arrays.asList(tuple(1, "a"), tuple(2, "b"), tuple(3, "c"))
);
assertEquals(
Seq.of(1, 2, 3).zip(Seq.of("a", "b", "c"), (x, y) -> x + ":" + y).toList(),
Arrays.asList("1:a", "2:b", "3:c")
);
assertEquals(
Seq.of("a", "b", "c").zipWithIndex().toList(),
Arrays.asList(tuple("a", 0L), tuple("b", 1L), tuple("c", 2L))
);
}
public Integer methodThatThrowsChecked(String arg) throws Exception {
return arg.length();
}
@Test
public void givenOperationThatThrowsCheckedException_whenExecuteAndNeedToWrapCheckedIntoUnchecked_shouldPass() {
//when
List<Integer> collect = Stream.of("a", "b", "c").map(elem -> {
try {
return methodThatThrowsChecked(elem);
} catch (Exception e) {
e.printStackTrace();
throw new RuntimeException(e);
}
}).collect(Collectors.toList());
//then
assertEquals(
collect,
Arrays.asList(1, 1, 1)
);
}
@Test
public void givenOperationThatThrowsCheckedException_whenExecuteUsingUncheckedFuction_shouldPass() {
//when
List<Integer> collect = Stream.of("a", "b", "c")
.map(Unchecked.function(elem -> methodThatThrowsChecked(elem)))
.collect(Collectors.toList());
//then
assertEquals(
collect,
Arrays.asList(1, 1, 1)
);
}
@Test
public void givenFunction_whenAppliedPartially_shouldAddNumberToPartialArgument() {
//given
Function2<Integer, Integer, Integer> addTwoNumbers = (v1, v2) -> v1 + v2;
addTwoNumbers.toBiFunction();
Function1<Integer, Integer> addToTwo = addTwoNumbers.applyPartially(2);
//when
Integer result = addToTwo.apply(5);
//then
assertEquals(result, (Integer) 7);
}
@Test
public void givenSeqOfTuples_whenTransformToLowerNumberOfTuples_shouldHaveProperResult() {
//given
Seq<Tuple3<String, String, Integer>> personDetails = Seq.of(tuple("michael", "similar", 49), tuple("jodie", "variable", 43));
Tuple2<String, String> tuple = tuple("winter", "summer");
//when
List<Tuple4<String, String, String, String>> result = personDetails.map(t -> t.limit2().concat(tuple)).toList();
//then
assertEquals(
result,
Arrays.asList(tuple("michael", "similar", "winter", "summer"), tuple("jodie", "variable", "winter", "summer"))
);
}
}

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kotlin/README.md Normal file
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## Relevant articles:
- [Introduction to the Kotlin Language](http://www.baeldung.com/kotlin)

48
libraries/pom.xml Normal file
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<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<parent>
<artifactId>parent-modules</artifactId>
<groupId>com.baeldung</groupId>
<version>1.0.0-SNAPSHOT</version>
</parent>
<modelVersion>4.0.0</modelVersion>
<artifactId>libraries</artifactId>
<name>libraries</name>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<configuration>
<source>1.8</source>
<target>1.8</target>
</configuration>
</plugin>
</plugins>
</build>
<dependencies>
<!-- https://mvnrepository.com/artifact/cglib/cglib -->
<dependency>
<groupId>cglib</groupId>
<artifactId>cglib</artifactId>
<version>${cglib.version}</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>${junit.version}</version>
<scope>test</scope>
</dependency>
</dependencies>
<properties>
<cglib.version>3.2.4</cglib.version>
<junit.version>4.12</junit.version>
</properties>
</project>

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libraries/src/main/java/com/baeldung/cglib/mixin/Class1.java Normal file
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package com.baeldung.cglib.mixin;
public class Class1 implements Interface1 {
@Override
public String first() {
return "first behaviour";
}
}

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libraries/src/main/java/com/baeldung/cglib/mixin/Class2.java Normal file
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package com.baeldung.cglib.mixin;
public class Class2 implements Interface2 {
@Override
public String second() {
return "second behaviour";
}
}

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libraries/src/main/java/com/baeldung/cglib/mixin/Interface1.java Normal file
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package com.baeldung.cglib.mixin;
public interface Interface1 {
String first();
}

5
libraries/src/main/java/com/baeldung/cglib/mixin/Interface2.java Normal file
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package com.baeldung.cglib.mixin;
public interface Interface2 {
String second();
}

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libraries/src/main/java/com/baeldung/cglib/mixin/MixinInterface.java Normal file
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package com.baeldung.cglib.mixin;
public interface MixinInterface extends Interface1, Interface2 {
}

11
libraries/src/main/java/com/baeldung/cglib/proxy/PersonService.java Normal file
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package com.baeldung.cglib.proxy;
public class PersonService {
public String sayHello(String name) {
return "Hello " + name;
}
public Integer lengthOfName(String name) {
return name.length();
}
}

32
libraries/src/test/java/com/baeldung/cglib/proxy/BeanGeneratorTest.java Normal file
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package com.baeldung.cglib.proxy;
import net.sf.cglib.beans.BeanGenerator;
import org.junit.Test;
import java.lang.reflect.Method;
import static junit.framework.TestCase.assertEquals;
public class BeanGeneratorTest {
@Test
public void givenBeanCreator_whenAddProperty_thenClassShouldHaveFieldValue() throws Exception {
//given
BeanGenerator beanGenerator = new BeanGenerator();
//when
beanGenerator.addProperty("name", String.class);
Object myBean = beanGenerator.create();
Method setter = myBean
.getClass()
.getMethod("setName", String.class);
setter.invoke(myBean, "some string value set by a cglib");
//then
Method getter = myBean
.getClass()
.getMethod("getName");
assertEquals("some string value set by a cglib", getter.invoke(myBean));
}
}

24
libraries/src/test/java/com/baeldung/cglib/proxy/MixinTest.java Normal file
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package com.baeldung.cglib.proxy;
import com.baeldung.cglib.mixin.*;
import net.sf.cglib.proxy.Mixin;
import org.junit.Test;
import static junit.framework.TestCase.assertEquals;
public class MixinTest {
@Test
public void givenTwoClasses_whenMixedIntoOne_thenMixinShouldHaveMethodsFromBothClasses() throws Exception {
//when
Mixin mixin = Mixin.create(
new Class[]{Interface1.class, Interface2.class, MixinInterface.class},
new Object[]{new Class1(), new Class2()}
);
MixinInterface mixinDelegate = (MixinInterface) mixin;
//then
assertEquals("first behaviour", mixinDelegate.first());
assertEquals("second behaviour", mixinDelegate.second());
}
}

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libraries/src/test/java/com/baeldung/cglib/proxy/ProxyTest.java Normal file
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package com.baeldung.cglib.proxy;
import net.sf.cglib.proxy.Enhancer;
import net.sf.cglib.proxy.FixedValue;
import net.sf.cglib.proxy.MethodInterceptor;
import org.junit.Test;
import static org.junit.Assert.assertEquals;
public class ProxyTest {
@Test
public void givenPersonService_whenSayHello_thenReturnResult() {
//given
PersonService personService = new PersonService();
//when
String res = personService.sayHello("Tom");
//then
assertEquals(res, "Hello Tom");
}
@Test
public void givenEnhancerProxy_whenExtendPersonService_thenInterceptMethod() throws Exception {
//given
Enhancer enhancer = new Enhancer();
enhancer.setSuperclass(PersonService.class);
enhancer.setCallback((FixedValue) () -> "Hello Tom!");
PersonService proxy = (PersonService) enhancer.create();
//when
String res = proxy.sayHello(null);
//then
assertEquals("Hello Tom!", res);
}
@Test
public void givenEnhancer_whenExecuteMethodOnProxy_thenInterceptOnlyStringReturnTypeMethod() throws Exception {
//given
Enhancer enhancer = new Enhancer();
enhancer.setSuperclass(PersonService.class);
enhancer.setCallback((MethodInterceptor) (obj, method, args, proxy) -> {
if (method.getDeclaringClass() != Object.class && method.getReturnType() == String.class) {
return "Hello Tom!";
} else {
return proxy.invokeSuper(obj, args);
}
});
//when
PersonService proxy = (PersonService) enhancer.create();
//then
assertEquals("Hello Tom!", proxy.sayHello(null));
int lengthOfName = proxy.lengthOfName("Mary");
assertEquals(4, lengthOfName);
}
}

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log4j2/pom.xml
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<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<artifactId>log4j2</artifactId>
<artifactId>log4j2</artifactId>
<parent>
<groupId>com.baeldung</groupId>
<artifactId>parent-modules</artifactId>
<version>1.0.0-SNAPSHOT</version>
<relativePath>..</relativePath>
</parent>
<parent>
<groupId>com.baeldung</groupId>
<artifactId>parent-modules</artifactId>
<version>1.0.0-SNAPSHOT</version>
<relativePath>..</relativePath>
</parent>
<dependencies>
<!-- This is the needed core component. -->
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-core</artifactId>
<version>${log4j-core.version}</version>
</dependency>
<dependencies>
<!-- This is the needed core component. -->
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-core</artifactId>
<version>${log4j-core.version}</version>
</dependency>
<!-- This is used by JSONLayout. -->
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>${jackson.version}</version>
</dependency>
<!-- This is used by JSONLayout. -->
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>${jackson.version}</version>
</dependency>
<!-- This is used by XMLLayout. -->
<dependency>
<groupId>com.fasterxml.jackson.dataformat</groupId>
<artifactId>jackson-dataformat-xml</artifactId>
<version>${jackson.version}</version>
</dependency>
<!-- This is used by XMLLayout. -->
<dependency>
<groupId>com.fasterxml.jackson.dataformat</groupId>
<artifactId>jackson-dataformat-xml</artifactId>
<version>${jackson.version}</version>
</dependency>
<!-- This is used by JDBC Appender. -->
<dependency>
<groupId>com.h2database</groupId>
<artifactId>h2</artifactId>
<version>${h2.version}</version>
</dependency>
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-dbcp2</artifactId>
<version>${commons-dbcp2.version}</version>
</dependency>
<!-- This is used by JDBC Appender. -->
<dependency>
<groupId>com.h2database</groupId>
<artifactId>h2</artifactId>
<version>${h2.version}</version>
</dependency>
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-dbcp2</artifactId>
<version>${commons-dbcp2.version}</version>
</dependency>
<!-- This is used for testing only. -->
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-core</artifactId>
<version>${log4j-core.version}</version>
<type>test-jar</type>
<scope>test</scope>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>${junit.version}</version>
<scope>test</scope>
</dependency>
</dependencies>
<!-- This is used for testing only. -->
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-core</artifactId>
<version>${log4j-core.version}</version>
<type>test-jar</type>
<scope>test</scope>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>${junit.version}</version>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>${maven-compiler-plugin.version}</version>
<configuration>
<source>1.8</source>
<target>1.8</target>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin</artifactId>
<version>${maven-surefire-plugin.version}</version>
<configuration>
<excludes>
<exclude>**/*IntegrationTest.java</exclude>
<exclude>**/*LongRunningUnitTest.java</exclude>
<exclude>**/*ManualTest.java</exclude>
</excludes>
<testFailureIgnore>true</testFailureIgnore>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>${maven-compiler-plugin.version}</version>
<configuration>
<source>1.8</source>
<target>1.8</target>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin</artifactId>
<version>${maven-surefire-plugin.version}</version>
<configuration>
<excludes>
<exclude>**/*IntegrationTest.java</exclude>
<exclude>**/*LongRunningUnitTest.java</exclude>
<exclude>**/*ManualTest.java</exclude>
</excludes>
<testFailureIgnore>true</testFailureIgnore>
</configuration>
</plugin>
</plugins>
</build>
</plugins>
</build>
<properties>
<jackson.version>2.8.5</jackson.version>
<h2.version>1.4.193</h2.version>
<commons-dbcp2.version>2.1.1</commons-dbcp2.version>
<log4j-core.version>2.7</log4j-core.version>
<junit.version>4.12</junit.version>
<maven-compiler-plugin.version>3.6.0</maven-compiler-plugin.version>
<maven-surefire-plugin.version>2.19.1</maven-surefire-plugin.version>
</properties>
<properties>
<jackson.version>2.8.5</jackson.version>
<h2.version>1.4.193</h2.version>
<commons-dbcp2.version>2.1.1</commons-dbcp2.version>
<log4j-core.version>2.7</log4j-core.version>
<junit.version>4.12</junit.version>
<maven-compiler-plugin.version>3.6.0</maven-compiler-plugin.version>
<maven-surefire-plugin.version>2.19.1</maven-surefire-plugin.version>
</properties>
</project>

32
log4j2/src/test/java/com/baeldung/logging/log4j2/tests/AsyncFileAppenderUsingJsonLayoutTest.java
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@ -1,32 +0,0 @@
package com.baeldung.logging.log4j2.tests;
import org.apache.logging.log4j.Logger;
import org.apache.logging.log4j.junit.LoggerContextRule;
import org.junit.Rule;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;
import java.nio.file.Files;
import java.nio.file.Paths;
import static org.junit.Assert.assertTrue;
@RunWith(JUnit4.class)
public class AsyncFileAppenderUsingJsonLayoutTest {
@Rule
public LoggerContextRule contextRule =
new LoggerContextRule("log4j2-async-file-appender_json-layout.xml");
@Test
public void givenLoggerWithAsyncConfig_shouldLogToJsonFile()
throws Exception {
Logger logger = contextRule.getLogger(getClass().getSimpleName());
final int count = 88;
for (int i = 0; i < count; i++) {
logger.info("This is async JSON message #{} at INFO level.", count);
}
long logEventsCount = Files.lines(Paths.get("target/logfile.json")).count();
assertTrue(logEventsCount > 0 && logEventsCount <= count);
}
}

21
log4j2/src/test/java/com/baeldung/logging/log4j2/tests/ConsoleAppenderUsingDefaultLayoutTest.java
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@ -1,21 +0,0 @@
package com.baeldung.logging.log4j2.tests;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;
@RunWith(JUnit4.class)
public class ConsoleAppenderUsingDefaultLayoutTest {
@Test
public void givenLoggerWithDefaultConfig_shouldLogToConsole()
throws Exception {
Logger logger = LogManager.getLogger(getClass());
Exception e = new RuntimeException("This is only a test!");
logger.info("This is a simple message at INFO level. " +
"It will be hidden.");
logger.error("This is a simple message at ERROR level. " +
"This is the minimum visible level.", e);
}
}

51
log4j2/src/test/java/com/baeldung/logging/log4j2/tests/ConsoleAppenderUsingPatternLayoutWithColorsTest.java
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@ -1,51 +0,0 @@
package com.baeldung.logging.log4j2.tests;
import org.apache.logging.log4j.Logger;
import org.apache.logging.log4j.Marker;
import org.apache.logging.log4j.MarkerManager;
import org.apache.logging.log4j.ThreadContext;
import org.apache.logging.log4j.junit.LoggerContextRule;
import org.junit.Rule;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;
@RunWith(JUnit4.class)
public class ConsoleAppenderUsingPatternLayoutWithColorsTest {
@Rule
public LoggerContextRule contextRule =
new LoggerContextRule("log4j2-console-appender_pattern-layout.xml");
@Test
public void givenLoggerWithConsoleConfig_shouldLogToConsoleInColors()
throws Exception {
Logger logger = contextRule.getLogger(getClass().getSimpleName());
logger.trace("This is a colored message at TRACE level.");
logger.debug("This is a colored message at DEBUG level. " +
"This is the minimum visible level.");
logger.info("This is a colored message at INFO level.");
logger.warn("This is a colored message at WARN level.");
Exception e = new RuntimeException("This is only a test!");
logger.error("This is a colored message at ERROR level.", e);
logger.fatal("This is a colored message at FATAL level.");
}
@Test
public void givenLoggerWithConsoleConfig_shouldFilterByMarker() throws Exception {
Logger logger = contextRule.getLogger("ConnTrace");
Marker appError = MarkerManager.getMarker("APP_ERROR");
logger.error(appError, "This marker message at ERROR level should be hidden.");
Marker connectionTrace = MarkerManager.getMarker("CONN_TRACE");
logger.trace(connectionTrace, "This is a marker message at TRACE level.");
}
@Test
public void givenLoggerWithConsoleConfig_shouldFilterByThreadContext() throws Exception {
Logger logger = contextRule.getLogger("UserAudit");
ThreadContext.put("userId", "1000");
logger.info("This is a log-visible user login. Maybe from an admin account?");
ThreadContext.put("userId", "1001");
logger.info("This is a log-invisible user login.");
boolean b = true;
}
}

130
log4j2/src/test/java/com/baeldung/logging/log4j2/tests/CustomLoggingTest.java Normal file
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@ -0,0 +1,130 @@
package com.baeldung.logging.log4j2.tests;
import static org.junit.Assert.assertTrue;
import java.nio.file.Files;
import java.nio.file.Paths;
import java.sql.Connection;
import java.sql.ResultSet;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.apache.logging.log4j.Marker;
import org.apache.logging.log4j.MarkerManager;
import org.apache.logging.log4j.ThreadContext;
import org.junit.BeforeClass;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;
import com.baeldung.logging.log4j2.tests.jdbc.ConnectionFactory;
@RunWith(JUnit4.class)
public class CustomLoggingTest {
@BeforeClass
public static void setup() throws Exception {
Connection connection = ConnectionFactory.getConnection();
connection.createStatement()
.execute("CREATE TABLE logs(" + "when TIMESTAMP," + "logger VARCHAR(255)," + "level VARCHAR(255)," + "message VARCHAR(4096)," + "throwable TEXT)");
connection.commit();
}
@Test
public void givenLoggerWithDefaultConfig_whenLogToConsole_thanOK() throws Exception {
Logger logger = LogManager.getLogger(getClass());
Exception e = new RuntimeException("This is only a test!");
logger.info("This is a simple message at INFO level. " + "It will be hidden.");
logger.error("This is a simple message at ERROR level. " + "This is the minimum visible level.", e);
}
@Test
public void givenLoggerWithConsoleConfig_whenLogToConsoleInColors_thanOK() throws Exception {
Logger logger = LogManager.getLogger("CONSOLE_PATTERN_APPENDER_MARKER");
Exception e = new RuntimeException("This is only a test!");
logger.trace("This is a colored message at TRACE level.");
logger.debug("This is a colored message at DEBUG level. " + "This is the minimum visible level.");
logger.info("This is a colored message at INFO level.");
logger.warn("This is a colored message at WARN level.");
logger.error("This is a colored message at ERROR level.", e);
logger.fatal("This is a colored message at FATAL level.");
}
@Test
public void givenLoggerWithConsoleConfig_whenFilterByMarker_thanOK() throws Exception {
Logger logger = LogManager.getLogger("CONSOLE_PATTERN_APPENDER_MARKER");
Marker appError = MarkerManager.getMarker("APP_ERROR");
Marker connectionTrace = MarkerManager.getMarker("CONN_TRACE");
logger.error(appError, "This marker message at ERROR level should be hidden.");
logger.trace(connectionTrace, "This is a marker message at TRACE level.");
}
@Test
public void givenLoggerWithConsoleConfig_whenFilterByThreadContext_thanOK() throws Exception {
Logger logger = LogManager.getLogger("CONSOLE_PATTERN_APPENDER_THREAD_CONTEXT");
ThreadContext.put("userId", "1000");
logger.info("This is a log-visible user login. Maybe from an admin account?");
ThreadContext.put("userId", "1001");
logger.info("This is a log-invisible user login.");
}
@Test
public void givenLoggerWithAsyncConfig_whenLogToJsonFile_thanOK() throws Exception {
Logger logger = LogManager.getLogger("ASYNC_JSON_FILE_APPENDER");
final int count = 88;
for (int i = 0; i < count; i++) {
logger.info("This is async JSON message #{} at INFO level.", count);
}
long logEventsCount = Files.lines(Paths.get("target/logfile.json"))
.count();
assertTrue(logEventsCount > 0 && logEventsCount <= count);
}
@Test
public void givenLoggerWithFailoverConfig_whenLog_thanOK() throws Exception {
Logger logger = LogManager.getLogger("FAIL_OVER_SYSLOG_APPENDER");
Exception e = new RuntimeException("This is only a test!");
logger.trace("This is a syslog message at TRACE level.");
logger.debug("This is a syslog message at DEBUG level.");
logger.info("This is a syslog message at INFO level. This is the minimum visible level.");
logger.warn("This is a syslog message at WARN level.");
logger.error("This is a syslog message at ERROR level.", e);
logger.fatal("This is a syslog message at FATAL level.");
}
@Test
public void givenLoggerWithJdbcConfig_whenLogToDataSource_thanOK() throws Exception {
Logger logger = LogManager.getLogger("JDBC_APPENDER");
final int count = 88;
for (int i = 0; i < count; i++) {
logger.info("This is JDBC message #{} at INFO level.", count);
}
Connection connection = ConnectionFactory.getConnection();
ResultSet resultSet = connection.createStatement()
.executeQuery("SELECT COUNT(*) AS ROW_COUNT FROM logs");
int logCount = 0;
if (resultSet.next()) {
logCount = resultSet.getInt("ROW_COUNT");
}
assertTrue(logCount == count);
}
@Test
public void givenLoggerWithRollingFileConfig_whenLogToXMLFile_thanOK() throws Exception {
Logger logger = LogManager.getLogger("XML_ROLLING_FILE_APPENDER");
final int count = 88;
for (int i = 0; i < count; i++) {
logger.info("This is rolling file XML message #{} at INFO level.", i);
}
}
}

27
log4j2/src/test/java/com/baeldung/logging/log4j2/tests/FailoverSyslogConsoleAppenderTest.java
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@ -1,27 +0,0 @@
package com.baeldung.logging.log4j2.tests;
import org.apache.logging.log4j.Logger;
import org.apache.logging.log4j.junit.LoggerContextRule;
import org.junit.Rule;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;
@RunWith(JUnit4.class)
public class FailoverSyslogConsoleAppenderTest {
@Rule
public LoggerContextRule contextRule =
new LoggerContextRule("log4j2-failover-syslog-console-appender_pattern-layout.xml");
@Test
public void givenLoggerWithFailoverConfig_shouldLog() throws Exception {
Logger logger = contextRule.getLogger(getClass().getSimpleName());
logger.trace("This is a syslog message at TRACE level.");
logger.debug("This is a syslog message at DEBUG level.");
logger.info("This is a syslog message at INFO level. This is the minimum visible level.");
logger.warn("This is a syslog message at WARN level.");
Exception e = new RuntimeException("This is only a test!");
logger.error("This is a syslog message at ERROR level.", e);
logger.fatal("This is a syslog message at FATAL level.");
}
}

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