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gschambial 2017-11-10 17:48:56 +05:30
commit 90c9744746
52 changed files with 1736 additions and 186 deletions
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59
algorithms/src/main/java/com/baeldung/algorithms/prime/PrimeGenerator.java Normal file
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@ -0,0 +1,59 @@
package com.baeldung.algorithms.prime;
import java.util.Arrays;
import java.util.LinkedList;
import java.util.List;
import java.util.stream.Collectors;
import java.util.stream.IntStream;
public class PrimeGenerator {
public static List<Integer> sieveOfEratosthenes(int n) {
final boolean prime[] = new boolean[n + 1];
Arrays.fill(prime, true);
for (int p = 2; p * p <= n; p++) {
if (prime[p]) {
for (int i = p * 2; i <= n; i += p)
prime[i] = false;
}
}
final List<Integer> primes = new LinkedList<>();
for (int i = 2; i <= n; i++) {
if (prime[i])
primes.add(i);
}
return primes;
}
public static List<Integer> primeNumbersBruteForce(int max) {
final List<Integer> primeNumbers = new LinkedList<Integer>();
for (int i = 2; i <= max; i++) {
if (isPrimeBruteForce(i)) {
primeNumbers.add(i);
}
}
return primeNumbers;
}
private static boolean isPrimeBruteForce(int x) {
for (int i = 2; i < x; i++) {
if (x % i == 0) {
return false;
}
}
return true;
}
public static List<Integer> primeNumbersTill(int max) {
return IntStream.rangeClosed(2, max)
.filter(x -> isPrime(x))
.boxed()
.collect(Collectors.toList());
}
private static boolean isPrime(int x) {
return IntStream.rangeClosed(2, (int) (Math.sqrt(x)))
.allMatch(n -> x % n != 0);
}
}

28
algorithms/src/test/java/com/baeldung/algorithms/prime/PrimeGeneratorTest.java Normal file
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@ -0,0 +1,28 @@
package com.baeldung.algorithms.prime;
import static com.baeldung.algorithms.prime.PrimeGenerator.*;
import java.util.Arrays;
import java.util.List;
import org.junit.Test;
import static org.junit.Assert.*;
public class PrimeGeneratorTest {
@Test
public void whenBruteForced_returnsSuccessfully() {
final List<Integer> primeNumbers = primeNumbersBruteForce(20);
assertEquals(Arrays.asList(new Integer[] { 2, 3, 5, 7, 11, 13, 17, 19 }), primeNumbers);
}
@Test
public void whenOptimized_returnsSuccessfully() {
final List<Integer> primeNumbers = primeNumbersTill(20);
assertEquals(Arrays.asList(new Integer[] { 2, 3, 5, 7, 11, 13, 17, 19 }), primeNumbers);
}
@Test
public void whenSieveOfEratosthenes_returnsSuccessfully() {
final List<Integer> primeNumbers = sieveOfEratosthenes(20);
assertEquals(Arrays.asList(new Integer[] { 2, 3, 5, 7, 11, 13, 17, 19 }), primeNumbers);
}
}

59
core-java-8/src/main/java/com/baeldung/prime/PrimeGenerator.java Normal file
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@ -0,0 +1,59 @@
package com.baeldung.prime;
import java.util.Arrays;
import java.util.LinkedList;
import java.util.List;
import java.util.stream.Collectors;
import java.util.stream.IntStream;
public class PrimeGenerator {
public static List<Integer> sieveOfEratosthenes(int n) {
final boolean prime[] = new boolean[n + 1];
Arrays.fill(prime, true);
for (int p = 2; p * p <= n; p++) {
if (prime[p]) {
for (int i = p * 2; i <= n; i += p)
prime[i] = false;
}
}
final List<Integer> primes = new LinkedList<>();
for (int i = 2; i <= n; i++) {
if (prime[i])
primes.add(i);
}
return primes;
}
public static List<Integer> primeNumbersBruteForce(int max) {
final List<Integer> primeNumbers = new LinkedList<Integer>();
for (int i = 2; i <= max; i++) {
if (isPrimeBruteForce(i)) {
primeNumbers.add(i);
}
}
return primeNumbers;
}
private static boolean isPrimeBruteForce(int x) {
for (int i = 2; i < x; i++) {
if (x % i == 0) {
return false;
}
}
return true;
}
public static List<Integer> primeNumbersTill(int max) {
return IntStream.rangeClosed(2, max)
.filter(x -> isPrime(x))
.boxed()
.collect(Collectors.toList());
}
private static boolean isPrime(int x) {
return IntStream.rangeClosed(2, (int) (Math.sqrt(x)))
.allMatch(n -> x % n != 0);
}
}

28
core-java-8/src/test/java/com/baeldung/prime/PrimeGeneratorTest.java Normal file
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@ -0,0 +1,28 @@
package com.baeldung.prime;
import static com.baeldung.prime.PrimeGenerator.*;
import java.util.Arrays;
import java.util.List;
import org.junit.Test;
import static org.junit.Assert.*;
public class PrimeGeneratorTest {
@Test
public void whenBruteForced_returnsSuccessfully() {
final List<Integer> primeNumbers = primeNumbersBruteForce(20);
assertEquals(Arrays.asList(new Integer[] { 2, 3, 5, 7, 11, 13, 17, 19 }), primeNumbers);
}
@Test
public void whenOptimized_returnsSuccessfully() {
final List<Integer> primeNumbers = primeNumbersTill(20);
assertEquals(Arrays.asList(new Integer[] { 2, 3, 5, 7, 11, 13, 17, 19 }), primeNumbers);
}
@Test
public void whenSieveOfEratosthenes_returnsSuccessfully() {
final List<Integer> primeNumbers = sieveOfEratosthenes(20);
assertEquals(Arrays.asList(new Integer[] { 2, 3, 5, 7, 11, 13, 17, 19 }), primeNumbers);
}
}

137
core-java/src/test/java/com/baeldung/stack/StackUnitTest.java Normal file
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@ -0,0 +1,137 @@
package com.baeldung.stack;
import static org.hamcrest.CoreMatchers.equalTo;
import static org.junit.Assert.*;
import java.util.Arrays;
import java.util.List;
import java.util.ListIterator;
import java.util.Stack;
import org.junit.Test;
public class StackUnitTest {
@Test
public void whenStackIsCreated_thenItHasSize0() {
Stack intStack = new Stack();
assertEquals(0, intStack.size());
}
@Test
public void givenEmptyStack_whenElementIsPushed_thenStackSizeisIncreased() {
Stack intStack = new Stack();
intStack.push(1);
assertEquals(1, intStack.size());
}
@Test
public void givenEmptyStack_whenMultipleElementsArePushed_thenStackSizeisIncreased() {
Stack intStack = new Stack();
List<Integer> intList = Arrays.asList(1, 2, 3, 4, 5, 6, 7);
boolean result = intStack.addAll(intList);
assertTrue(result);
assertEquals(7, intList.size());
}
@Test
public void whenElementIsPoppedFromStack_thenElementIsRemovedAndSizeChanges() {
Stack<Integer> intStack = new Stack();
intStack.push(5);
intStack.pop();
assertTrue(intStack.isEmpty());
}
@Test
public void whenElementIsPeeked_thenElementIsNotRemovedAndSizeDoesNotChange() {
Stack<Integer> intStack = new Stack();
intStack.push(5);
intStack.peek();
assertEquals(1, intStack.search(5));
assertEquals(1, intStack.size());
}
@Test
public void whenElementIsOnStack_thenSearchReturnsItsDistanceFromTheTop() {
Stack<Integer> intStack = new Stack();
intStack.push(5);
assertEquals(1, intStack.search(5));
}
@Test
public void whenElementIsOnStack_thenIndexOfReturnsItsIndex() {
Stack<Integer> intStack = new Stack();
intStack.push(5);
int indexOf = intStack.indexOf(5);
assertEquals(0, indexOf);
}
@Test
public void whenMultipleElementsAreOnStack_thenIndexOfReturnsLastElementIndex() {
Stack<Integer> intStack = new Stack();
intStack.push(5);
intStack.push(5);
intStack.push(5);
int lastIndexOf = intStack.lastIndexOf(5);
assertEquals(2, lastIndexOf);
}
@Test
public void givenElementOnStack_whenRemoveElementIsInvoked_thenElementIsRemoved() {
Stack<Integer> intStack = new Stack();
intStack.push(5);
intStack.push(5);
intStack.removeElement(5);
assertEquals(1, intStack.size());
}
@Test
public void givenElementOnStack_whenRemoveElementAtIsInvoked_thenElementIsRemoved() {
Stack<Integer> intStack = new Stack();
intStack.push(5);
intStack.push(7);
intStack.removeElementAt(1);
assertEquals(-1, intStack.search(7));
}
@Test
public void givenElementsOnStack_whenRemoveAllElementsIsInvoked_thenAllElementsAreRemoved() {
Stack<Integer> intStack = new Stack();
intStack.push(5);
intStack.push(7);
intStack.removeAllElements();
assertTrue(intStack.isEmpty());
}
@Test
public void givenElementsOnStack_whenRemoveAllIsInvoked_thenAllElementsFromCollectionAreRemoved() {
Stack<Integer> intStack = new Stack();
List<Integer> intList = Arrays.asList(1, 2, 3, 4, 5, 6, 7);
intStack.addAll(intList);
intStack.add(500);
intStack.removeAll(intList);
assertEquals(1, intStack.size());
}
@Test
public void givenElementsOnStack_whenRemoveIfIsInvoked_thenAllElementsSatysfyingConditionAreRemoved() {
Stack<Integer> intStack = new Stack();
List<Integer> intList = Arrays.asList(1, 2, 3, 4, 5, 6, 7);
intStack.addAll(intList);
intStack.removeIf(element -> element < 6);
assertEquals(2, intStack.size());
}
@Test
public void whenAnotherStackCreatedWhileTraversingStack_thenStacksAreEqual() {
Stack<Integer> intStack = new Stack<>();
List<Integer> intList = Arrays.asList(1, 2, 3, 4, 5, 6, 7);
intStack.addAll(intList);
ListIterator<Integer> it = intStack.listIterator();
Stack<Integer> result = new Stack();
while(it.hasNext()) {
result.push(it.next());
}
assertThat(result, equalTo(intStack));
}
}

43
core-java/src/test/java/com/baeldung/stringpool/StringPoolUnitTest.java Normal file
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@ -0,0 +1,43 @@
package com.baeldung.stringpool;
import org.junit.Test;
import static org.assertj.core.api.Assertions.*;
public class StringPoolUnitTest {
@Test
public void whenCreatingConstantStrings_thenTheirAddressesAreEqual() {
String constantString1 = "Baeldung";
String constantString2 = "Baeldung";
assertThat(constantString1).isSameAs(constantString2);
}
@Test
public void whenCreatingStringsWithTheNewOperator_thenTheirAddressesAreDifferent() {
String newString1 = new String("Baeldung");
String newString2 = new String("Baeldung");
assertThat(newString1).isNotSameAs(newString2);
}
@Test
public void whenComparingConstantAndNewStrings_thenTheirAddressesAreDifferent() {
String constantString = "Baeldung";
String newString = new String("Baeldung");
assertThat(constantString).isNotSameAs(newString);
}
@Test
public void whenInterningAStringWithIdenticalValueToAnother_thenTheirAddressesAreEqual() {
String constantString = "interned Baeldung";
String newString = new String("interned Baeldung");
assertThat(constantString).isNotSameAs(newString);
String internedString = newString.intern();
assertThat(constantString).isSameAs(internedString);
}
}

5
drools/backward-chaining/pom.xml
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@ -1,7 +1,6 @@
<?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>
<artifactId>drools-backward-chaining</artifactId>
@ -17,7 +16,6 @@
<properties>
<runtime.version>6.4.0.Final</runtime.version>
</properties>
<dependencies>
<dependency>
<groupId>org.kie</groupId>
@ -26,7 +24,6 @@
</dependency>
<dependency>
<groupId>org.drools</groupId>
<artifactId>drools-core</artifactId>
<version>${runtime.version}</version>
</dependency>
<dependency>
@ -35,4 +32,4 @@
<version>${runtime.version}</version>
</dependency>
</dependencies>
</project>
</project>

4
drools/backward-chaining/src/main/java/com/baeldung/drools/BackwardChaining.java
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@ -21,13 +21,11 @@ public class BackwardChaining {
KieSession ksession = kContainer.newKieSession("ksession-backward-chaining");
ksession.setGlobal("result", result);
ksession.insert(new Fact("Asia", "Planet Earth"));
// ksession.insert(new Fact("China", "Asia"));
// ksession.insert(new Fact("China", "Asia"));
ksession.insert(new Fact("Great Wall of China", "China"));
ksession.fireAllRules();
return result;
}
}

27
drools/backward-chaining/src/main/resources/com/baeldung/drools/backward_chaining/rules.drl Normal file
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@ -0,0 +1,27 @@
package com.baeldung
import com.baeldung.drools.model.Fact;
global com.baeldung.drools.model.Result result;
dialect "mvel"
query belongsTo(String x, String y)
Fact(x, y;)
or
(Fact(z, y;) and belongsTo(x, z;))
end
rule "Great Wall of China BELONGS TO Planet Earth"
when
belongsTo("Great Wall of China", "Planet Earth";)
then
result.setValue("Decision one taken: Great Wall of China BELONGS TO Planet Earth");
end
rule "print all facts"
when
belongsTo(element, place;)
then
result.addFact(element + " IS ELEMENT OF " + place);
end

3
drools/backward-chaining/src/test/java/com/baeldung/test/BackwardChainingTest.java
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@ -2,8 +2,6 @@ package com.baeldung.test;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;
import org.kie.api.KieServices;
import org.kie.api.runtime.KieContainer;
import org.kie.api.runtime.KieSession;
@ -13,7 +11,6 @@ import com.baeldung.drools.model.Result;
import static junit.framework.TestCase.assertEquals;
@RunWith(value = JUnit4.class)
public class BackwardChainingTest {
private Result result;
private KieServices ks;

2
drools/pom.xml
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@ -7,6 +7,8 @@
<groupId>com.baeldung</groupId>
<artifactId>drools</artifactId>
<version>1.0.0-SNAPSHOT</version>
<packaging>pom</packaging>
<parent>
<groupId>com.baeldung</groupId>

17
guest/spring-security/README.md Normal file
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@ -0,0 +1,17 @@
## Building
To build the module, use Maven's `package` goal:
```
mvn clean package
```
## Running
To run the application, use Spring Boot's `run` goal:
```
mvn spring-boot:run
```
The application will be accessible at [http://localhost:8080/](http://localhost:8080/)

77
guest/spring-security/pom.xml Normal file
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@ -0,0 +1,77 @@
<?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>
<groupId>com.stackify.guest</groupId>
<artifactId>spring-security</artifactId>
<version>1.0-SNAPSHOT</version>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.0.0.M6</version>
<relativePath/>
</parent>
<name>spring-security</name>
<description>Spring Security Sample Project</description>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-thymeleaf</artifactId>
</dependency>
<dependency>
<groupId>org.thymeleaf</groupId>
<artifactId>thymeleaf-spring5</artifactId>
<version>3.0.8.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-security</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-jdbc</artifactId>
</dependency>
<dependency>
<groupId>com.h2database</groupId>
<artifactId>h2</artifactId>
<scope>runtime</scope>
</dependency>
</dependencies>
<repositories>
<repository>
<id>spring-milestones</id>
<name>Spring Milestones</name>
<url>https://repo.spring.io/milestone</url>
<snapshots>
<enabled>false</enabled>
</snapshots>
</repository>
</repositories>
<pluginRepositories>
<pluginRepository>
<id>spring-milestones</id>
<name>Spring Milestones</name>
<url>https://repo.spring.io/milestone</url>
<snapshots>
<enabled>false</enabled>
</snapshots>
</pluginRepository>
</pluginRepositories>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<java.version>1.8</java.version>
</properties>
</project>

15
guest/spring-security/src/main/java/com/stackify/guest/springsecurity/Application.java Normal file
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@ -0,0 +1,15 @@
package com.stackify.guest.springsecurity;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.ComponentScan;
@SpringBootApplication
@ComponentScan(basePackages = {"com.stackify.guest.springsecurity"})
public class Application {
public static void main(String[] args) {
SpringApplication.run(Application.class, args);
}
}

16
guest/spring-security/src/main/java/com/stackify/guest/springsecurity/config/WebMvcConfiguration.java Normal file
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@ -0,0 +1,16 @@
package com.stackify.guest.springsecurity.config;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.ViewControllerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
@Configuration
public class WebMvcConfiguration implements WebMvcConfigurer {
@Override
public void addViewControllers(ViewControllerRegistry registry) {
registry.addViewController("/customLogin").setViewName("customLogin");
registry.addViewController("/loginSuccess").setViewName("index");
}
}

40
guest/spring-security/src/main/java/com/stackify/guest/springsecurity/config/WebSecurityConfig.java Normal file
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@ -0,0 +1,40 @@
package com.stackify.guest.springsecurity.config;
import org.springframework.context.annotation.Bean;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;
import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
import org.springframework.security.core.userdetails.UserDetailsService;
import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
import org.springframework.security.crypto.password.PasswordEncoder;
import org.springframework.security.provisioning.JdbcUserDetailsManager;
import javax.sql.DataSource;
@EnableWebSecurity
public class WebSecurityConfig extends WebSecurityConfigurerAdapter {
@Bean
public UserDetailsService jdbcUserDetailsService(DataSource dataSource) {
JdbcUserDetailsManager manager = new JdbcUserDetailsManager();
manager.setDataSource(dataSource);
return manager;
}
@Bean
public PasswordEncoder passwordEncoder() {
return new BCryptPasswordEncoder();
}
@Override
protected void configure(HttpSecurity http) throws Exception {
http.authorizeRequests()
.antMatchers("/css/**").permitAll()
.anyRequest().authenticated()
.and().formLogin()
.loginPage("/customLogin")
.defaultSuccessUrl("/loginSuccess", true)
.permitAll();
}
}

2
guest/spring-security/src/main/resources/data.sql Normal file
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@ -0,0 +1,2 @@
INSERT INTO users VALUES ('jill', '$2a$04$qUlqAEEYF1YvrpJMosodoewgL6aO.qgHytl2k5L7kdXEWnJsFdxvq', TRUE);
INSERT INTO authorities VALUES ('jill', 'USERS');

10
guest/spring-security/src/main/resources/schema.sql Normal file
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@ -0,0 +1,10 @@
CREATE TABLE users (
username VARCHAR(256) PRIMARY KEY,
password VARCHAR(256),
enabled BOOLEAN
);
CREATE TABLE authorities (
username VARCHAR(256) REFERENCES users (username),
authority VARCHAR(256)
);

3
guest/spring-security/src/main/resources/static/css/styles.css Normal file
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@ -0,0 +1,3 @@
.bad-login {
color: red;
}

21
guest/spring-security/src/main/resources/templates/customLogin.html Normal file
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@ -0,0 +1,21 @@
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml"
xmlns:th="http://www.thymeleaf.org">
<head>
<link rel="stylesheet" href="/css/styles.css">
</head>
<body>
<form th:action="@{/customLogin}" method="post">
<fieldset>
<label for="username">Login:</label>
<input id="username" name="username">
<label for="password">Password:</label>
<input id="password" name="password" type="password">
</fieldset>
<input type="hidden" th:name="${_csrf.parameterName}" th:value="${_csrf.token}"/>
<input type="submit" value="Login">
<div th:if="${param.error}" class="bad-login">Bad login or password.</div>
<div th:if="${param.logout}">Log out successful.</div>
</form>
</body>
</html>

11
guest/spring-security/src/main/resources/templates/index.html Normal file
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@ -0,0 +1,11 @@
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml"
xmlns:th="http://www.thymeleaf.org">
<p>Hello, <span th:text="${
T(org.springframework.security.core.context.SecurityContextHolder)
.context.authentication.principal.username}"></span>!</p>
<form action="/logout" method="post">
<input type="hidden" th:name="${_csrf.parameterName}" th:value="${_csrf.token}"/>
<input type="submit" value="Log Out">
</form>
</html>

17
hibernate5/src/main/java/com/baeldung/hibernate/HibernateUtil.java
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@ -2,8 +2,17 @@ package com.baeldung.hibernate;
import com.baeldung.hibernate.pojo.Employee;
import com.baeldung.hibernate.pojo.EntityDescription;
import com.baeldung.hibernate.pojo.OrderEntry;
import com.baeldung.hibernate.pojo.OrderEntryIdClass;
import com.baeldung.hibernate.pojo.OrderEntryPK;
import com.baeldung.hibernate.pojo.Product;
import com.baeldung.hibernate.pojo.Phone;
import com.baeldung.hibernate.pojo.TemporalValues;
import com.baeldung.hibernate.pojo.Course;
import com.baeldung.hibernate.pojo.Student;
import com.baeldung.hibernate.pojo.User;
import com.baeldung.hibernate.pojo.UserProfile;
import org.hibernate.SessionFactory;
import org.hibernate.boot.Metadata;
import org.hibernate.boot.MetadataSources;
@ -33,6 +42,14 @@ public class HibernateUtil {
metadataSources.addAnnotatedClass(Phone.class);
metadataSources.addAnnotatedClass(EntityDescription.class);
metadataSources.addAnnotatedClass(TemporalValues.class);
metadataSources.addAnnotatedClass(User.class);
metadataSources.addAnnotatedClass(Student.class);
metadataSources.addAnnotatedClass(Course.class);
metadataSources.addAnnotatedClass(Product.class);
metadataSources.addAnnotatedClass(OrderEntryPK.class);
metadataSources.addAnnotatedClass(OrderEntry.class);
metadataSources.addAnnotatedClass(OrderEntryIdClass.class);
metadataSources.addAnnotatedClass(UserProfile.class);
Metadata metadata = metadataSources.buildMetadata();
return metadata.getSessionFactoryBuilder()

27
hibernate5/src/main/java/com/baeldung/hibernate/pojo/Course.java Normal file
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@ -0,0 +1,27 @@
package com.baeldung.hibernate.pojo;
import java.util.UUID;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
@Entity
public class Course {
@Id
@GeneratedValue
private UUID courseId;
public UUID getCourseId() {
return courseId;
}
public void setCourseId(UUID courseId) {
this.courseId = courseId;
}
}

25
hibernate5/src/main/java/com/baeldung/hibernate/pojo/Department.java Normal file
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@ -0,0 +1,25 @@
package com.baeldung.hibernate.pojo;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.TableGenerator;
@Entity
public class Department {
@Id
@GeneratedValue(strategy = GenerationType.TABLE, generator="table-generator")
@TableGenerator (name="table-generator", table="dep_ids", pkColumnName="seq_id", valueColumnName="seq_value")
private long depId;
public long getDepId() {
return depId;
}
public void setDepId(long depId) {
this.depId = depId;
}
}

20
hibernate5/src/main/java/com/baeldung/hibernate/pojo/OrderEntry.java Normal file
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package com.baeldung.hibernate.pojo;
import javax.persistence.EmbeddedId;
import javax.persistence.Entity;
@Entity
public class OrderEntry {
@EmbeddedId
private OrderEntryPK entryId;
public OrderEntryPK getEntryId() {
return entryId;
}
public void setEntryId(OrderEntryPK entryId) {
this.entryId = entryId;
}
}

31
hibernate5/src/main/java/com/baeldung/hibernate/pojo/OrderEntryIdClass.java Normal file
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package com.baeldung.hibernate.pojo;
import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.IdClass;
@Entity
@IdClass(OrderEntryPK.class)
public class OrderEntryIdClass {
@Id
private long orderId;
@Id
private long productId;
public long getOrderId() {
return orderId;
}
public void setOrderId(long orderId) {
this.orderId = orderId;
}
public long getProductId() {
return productId;
}
public void setProductId(long productId) {
this.productId = productId;
}
}

46
hibernate5/src/main/java/com/baeldung/hibernate/pojo/OrderEntryPK.java Normal file
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package com.baeldung.hibernate.pojo;
import java.io.Serializable;
import java.util.Objects;
import javax.persistence.Embeddable;
@Embeddable
public class OrderEntryPK implements Serializable {
private long orderId;
private long productId;
public long getOrderId() {
return orderId;
}
public void setOrderId(long orderId) {
this.orderId = orderId;
}
public long getProductId() {
return productId;
}
public void setProductId(long productId) {
this.productId = productId;
}
@Override
public boolean equals(Object o) {
if (this == o) {
return true;
}
if (o == null || getClass() != o.getClass()) {
return false;
}
OrderEntryPK pk = (OrderEntryPK) o;
return Objects.equals(orderId, pk.orderId) && Objects.equals(productId, pk.productId);
}
@Override
public int hashCode() {
return Objects.hash(orderId, productId);
}
}

26
hibernate5/src/main/java/com/baeldung/hibernate/pojo/Product.java Normal file
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package com.baeldung.hibernate.pojo;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import org.hibernate.annotations.GenericGenerator;
import org.hibernate.annotations.Parameter;
@Entity
public class Product {
@Id
@GeneratedValue(generator = "prod-generator")
@GenericGenerator(name = "prod-generator", parameters = @Parameter(name = "prefix", value = "prod"), strategy = "com.baeldung.hibernate.pojo.generator.MyGenerator")
private String prodId;
public String getProdId() {
return prodId;
}
public void setProdId(String prodId) {
this.prodId = prodId;
}
}

23
hibernate5/src/main/java/com/baeldung/hibernate/pojo/Student.java Normal file
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package com.baeldung.hibernate.pojo;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
@Entity
public class Student {
@Id
@GeneratedValue (strategy = GenerationType.SEQUENCE)
private long studentId;
public long getStudentId() {
return studentId;
}
public void setStudent_id(long studentId) {
this.studentId = studentId;
}
}

24
hibernate5/src/main/java/com/baeldung/hibernate/pojo/User.java Normal file
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package com.baeldung.hibernate.pojo;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.SequenceGenerator;
@Entity
public class User {
@Id
@GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "sequence-generator")
@SequenceGenerator(name = "sequence-generator", sequenceName = "user_sequence", initialValue = 4)
private long userId;
public long getUserId() {
return userId;
}
public void setUserId(long userId) {
this.userId = userId;
}
}

34
hibernate5/src/main/java/com/baeldung/hibernate/pojo/UserProfile.java Normal file
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package com.baeldung.hibernate.pojo;
import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.MapsId;
import javax.persistence.OneToOne;
@Entity
public class UserProfile {
@Id
private long profileId;
@OneToOne
@MapsId
private User user;
public long getProfileId() {
return profileId;
}
public void setProfileId(long profileId) {
this.profileId = profileId;
}
public User getUser() {
return user;
}
public void setUser(User user) {
this.user = user;
}
}

41
hibernate5/src/main/java/com/baeldung/hibernate/pojo/generator/MyGenerator.java Normal file
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package com.baeldung.hibernate.pojo.generator;
import java.io.Serializable;
import java.util.Properties;
import java.util.stream.Stream;
import org.hibernate.HibernateException;
import org.hibernate.MappingException;
import org.hibernate.engine.spi.SharedSessionContractImplementor;
import org.hibernate.id.Configurable;
import org.hibernate.id.IdentifierGenerator;
import org.hibernate.service.ServiceRegistry;
import org.hibernate.type.Type;
public class MyGenerator implements IdentifierGenerator, Configurable {
private String prefix;
@Override
public Serializable generate(SharedSessionContractImplementor session, Object obj) throws HibernateException {
String query = String.format("select %s from %s",
session.getEntityPersister(obj.getClass().getName(), obj).getIdentifierPropertyName(),
obj.getClass().getSimpleName());
Stream<String> ids = session.createQuery(query).stream();
Long max = ids.map(o -> o.replace(prefix + "-", ""))
.mapToLong(Long::parseLong)
.max()
.orElse(0L);
return prefix + "-" + (max + 1);
}
@Override
public void configure(Type type, Properties properties, ServiceRegistry serviceRegistry) throws MappingException {
prefix = properties.getProperty("prefix");
}
}

100
hibernate5/src/test/java/com/baeldung/hibernate/IdentifiersIntegrationTest.java Normal file
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package com.baeldung.hibernate;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import org.hibernate.Transaction;
import java.io.IOException;
import org.hibernate.Session;
import static org.assertj.core.api.Assertions.assertThat;
import com.baeldung.hibernate.pojo.Product;
import com.baeldung.hibernate.pojo.Course;
import com.baeldung.hibernate.pojo.OrderEntry;
import com.baeldung.hibernate.pojo.OrderEntryIdClass;
import com.baeldung.hibernate.pojo.OrderEntryPK;
import com.baeldung.hibernate.pojo.Student;
import com.baeldung.hibernate.pojo.User;
import com.baeldung.hibernate.pojo.UserProfile;
public class IdentifiersIntegrationTest {
private Session session;
private Transaction transaction;
@Before
public void setUp() throws IOException {
session = HibernateUtil.getSessionFactory()
.openSession();
transaction = session.beginTransaction();
}
@After
public void tearDown() {
transaction.rollback();
session.close();
}
@Test
public void whenSaveSimpleIdEntities_thenOk() {
Student student = new Student();
session.save(student);
User user = new User();
session.save(user);
assertThat(student.getStudentId()).isEqualTo(1L);
assertThat(user.getUserId()).isEqualTo(4L);
Course course = new Course();
session.save(course);
}
@Test
public void whenSaveCustomGeneratedId_thenOk() {
Product product = new Product();
session.save(product);
Product product2 = new Product();
session.save(product2);
assertThat(product2.getProdId()).isEqualTo("prod-2");
}
@Test
public void whenSaveCompositeIdEntity_thenOk() {
OrderEntryPK entryPK = new OrderEntryPK();
entryPK.setOrderId(1L);
entryPK.setProductId(30L);
OrderEntry entry = new OrderEntry();
entry.setEntryId(entryPK);
session.save(entry);
assertThat(entry.getEntryId()
.getOrderId()).isEqualTo(1L);
}
@Test
public void whenSaveIdClassEntity_thenOk() {
OrderEntryIdClass entry = new OrderEntryIdClass();
entry.setOrderId(1L);
entry.setProductId(30L);
session.save(entry);
assertThat(entry.getOrderId()).isEqualTo(1L);
}
@Test
public void whenSaveDerivedIdEntity_thenOk() {
User user = new User();
session.save(user);
UserProfile profile = new UserProfile();
profile.setUser(user);
session.save(profile);
assertThat(profile.getProfileId()).isEqualTo(user.getUserId());
}
}

12
jsonb/.gitignore vendored Normal file
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@ -0,0 +1,12 @@
#folders#
.idea
/target
/neoDb*
/data
/src/main/webapp/WEB-INF/classes
*/META-INF/*
# Packaged files #
*.jar
*.war
*.ear

1
jsonb/README.md Normal file
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@ -0,0 +1 @@
## JSON B

106
jsonb/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">
<modelVersion>4.0.0</modelVersion>
<groupId>com.baeldung</groupId>
<artifactId>json-b</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>json-b</name>
<description>json-b sample project</description>
<profiles>
<profile>
<id>yasson</id>
<activation>
<activeByDefault>true</activeByDefault>
</activation>
<dependencies>
<!-- Dependencies for Yasson -->
<dependency>
<groupId>org.eclipse</groupId>
<artifactId>yasson</artifactId>
<version>${yasson.version}</version>
</dependency>
<dependency>
<groupId>org.glassfish</groupId>
<artifactId>javax.json</artifactId>
<version>${javax.json.version}</version>
</dependency>
</dependencies>
</profile>
<profile>
<id>johnzon</id>
<dependencies>
<!-- Dependencies for Johnzon -->
<dependency>
<groupId>org.apache.geronimo.specs</groupId>
<artifactId>geronimo-json_1.1_spec</artifactId>
<version>${geronimo-json_1.1_spec.version}</version>
</dependency>
<dependency>
<groupId>org.apache.johnzon</groupId>
<artifactId>johnzon-jsonb</artifactId>
<version>${johnzon.version}</version>
</dependency>
</dependencies>
</profile>
</profiles>
<dependencies>
<dependency>
<groupId>javax.json.bind</groupId>
<artifactId>javax.json.bind-api</artifactId>
<version>${jsonb-api.version}</version>
</dependency>
<!-- utils -->
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-collections4</artifactId>
<version>${commons-collections4.version}</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.junit.jupiter</groupId>
<artifactId>junit-jupiter-api</artifactId>
<version>${junit.jupiter.version}</version>
</dependency>
<dependency>
<groupId>org.junit.jupiter</groupId>
<artifactId>junit-jupiter-engine</artifactId>
<version>${junit.jupiter.version}</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.junit.platform</groupId>
<artifactId>junit-platform-surefire-provider</artifactId>
<version>${junit.platform.version}</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.junit.platform</groupId>
<artifactId>junit-platform-runner</artifactId>
<version>${junit.platform.version}</version>
<scope>test</scope>
</dependency>
</dependencies>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<maven.compiler.source>1.8</maven.compiler.source>
<maven.compiler.target>1.8</maven.compiler.target>
<junit.platform.version>1.0.0</junit.platform.version>
<junit.jupiter.version>5.0.0</junit.jupiter.version>
<maven-surefire-plugin.version>2.20</maven-surefire-plugin.version>
<jsonb-api.version>1.0</jsonb-api.version>
<johnzon.version>1.1.3</johnzon.version>
<geronimo-json_1.1_spec.version>1.0</geronimo-json_1.1_spec.version>
<yasson.version>1.0</yasson.version>
<javax.json.version>1.1.2</javax.json.version>
<commons-collections4.version>4.1</commons-collections4.version>
</properties>
</project>

127
jsonb/src/main/java/com/baeldung/jsonb/Person.java Normal file
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@ -0,0 +1,127 @@
package com.baeldung.jsonb;
import java.math.BigDecimal;
import java.time.LocalDate;
import javax.json.bind.annotation.JsonbDateFormat;
import javax.json.bind.annotation.JsonbNumberFormat;
import javax.json.bind.annotation.JsonbProperty;
import javax.json.bind.annotation.JsonbTransient;
public class Person {
private int id;
@JsonbProperty("person-name")
private String name;
@JsonbProperty(nillable = true)
private String email;
@JsonbTransient
private int age;
@JsonbDateFormat("dd-MM-yyyy")
private LocalDate registeredDate;
private BigDecimal salary;
public Person() {
}
public Person(int id, String name, String email, int age, LocalDate registeredDate, BigDecimal salary) {
super();
this.id = id;
this.name = name;
this.email = email;
this.age = age;
this.registeredDate = registeredDate;
this.salary = salary;
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
@JsonbNumberFormat(locale = "en_US", value = "#0.0")
public BigDecimal getSalary() {
return salary;
}
public void setSalary(BigDecimal salary) {
this.salary = salary;
}
public LocalDate getRegisteredDate() {
return registeredDate;
}
public void setRegisteredDate(LocalDate registeredDate) {
this.registeredDate = registeredDate;
}
@Override
public String toString() {
StringBuilder builder = new StringBuilder();
builder.append("Person [id=");
builder.append(id);
builder.append(", name=");
builder.append(name);
builder.append(", email=");
builder.append(email);
builder.append(", age=");
builder.append(age);
builder.append(", registeredDate=");
builder.append(registeredDate);
builder.append(", salary=");
builder.append(salary);
builder.append("]");
return builder.toString();
}
@Override
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result + id;
return result;
}
@Override
public boolean equals(Object obj) {
if (this == obj)
return true;
if (obj == null)
return false;
if (getClass() != obj.getClass())
return false;
Person other = (Person) obj;
if (id != other.id)
return false;
return true;
}
}

158
jsonb/src/test/java/com/baeldung/jsonb/JsonbTest.java Normal file
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@ -0,0 +1,158 @@
package com.baeldung.jsonb;
import static org.junit.Assert.assertTrue;
import java.math.BigDecimal;
import java.time.LocalDate;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import javax.json.bind.Jsonb;
import javax.json.bind.JsonbBuilder;
import javax.json.bind.JsonbConfig;
import javax.json.bind.config.PropertyNamingStrategy;
import javax.json.bind.config.PropertyOrderStrategy;
import org.apache.commons.collections4.ListUtils;
import org.junit.Test;
public class JsonbTest {
@Test
public void givenPersonList_whenSerializeWithJsonb_thenGetPersonJsonArray() {
Jsonb jsonb = JsonbBuilder.create();
// @formatter:off
List<Person> personList = Arrays.asList(
new Person(1, "Jhon", "jhon@test.com", 20, LocalDate.of(2019, 9, 9), BigDecimal.valueOf(1000)),
new Person(2, "Jhon", "jhon1@test.com", 20, LocalDate.of(2019, 9, 9), BigDecimal.valueOf(1500)),
new Person(3, "Jhon", null, 20, LocalDate.of(2019, 9, 9), BigDecimal.valueOf(1000)),
new Person(4, "Tom", "tom@test.com", 21, LocalDate.of(2019, 9, 9), BigDecimal.valueOf(1500)));
// @formatter:on
String jsonArrayPerson = jsonb.toJson(personList);
// @formatter:off
String jsonExpected = "[" +
"{\"email\":\"jhon@test.com\"," +
"\"id\":1,\"person-name\":\"Jhon\"," +
"\"registeredDate\":\"09-09-2019\"," +
"\"salary\":\"1000.0\"}," +
"{\"email\":\"jhon1@test.com\"," +
"\"id\":2,\"person-name\":\"Jhon\"," +
"\"registeredDate\":\"09-09-2019\"," +
"\"salary\":\"1500.0\"},{\"email\":null," +
"\"id\":3,\"person-name\":\"Jhon\"," +
"\"registeredDate\":\"09-09-2019\"," +
"\"salary\":\"1000.0\"}," +
"{\"email\":\"tom@test.com\"," +
"\"id\":4,\"person-name\":\"Tom\"," +
"\"registeredDate\":\"09-09-2019\"," +
"\"salary\":\"1500.0\"}"
+ "]";
// @formatter:on
assertTrue(jsonArrayPerson.equals(jsonExpected));
}
@Test
public void givenPersonJsonArray_whenDeserializeWithJsonb_thenGetPersonList() {
Jsonb jsonb = JsonbBuilder.create();
// @formatter:off
String personJsonArray =
"[" +
"{\"email\":\"jhon@test.com\"," +
"\"id\":1,\"person-name\":\"Jhon\"," +
"\"registeredDate\":\"09-09-2019\"," +
"\"salary\":\"1000.0\"}," +
"{\"email\":\"jhon1@test.com\"," +
"\"id\":2,\"person-name\":\"Jhon\"," +
"\"registeredDate\":\"09-09-2019\"," +
"\"salary\":\"1500.0\"},{\"email\":null," +
"\"id\":3,\"person-name\":\"Jhon\"," +
"\"registeredDate\":\"09-09-2019\"," +
"\"salary\":\"1000.0\"}," +
"{\"email\":\"tom@test.com\"," +
"\"id\":4,\"person-name\":\"Tom\"," +
"\"registeredDate\":\"09-09-2019\"," +
"\"salary\":\"1500.0\"}"
+ "]";
// @formatter:on
@SuppressWarnings("serial")
List<Person> personList = jsonb.fromJson(personJsonArray, new ArrayList<Person>() {
}.getClass()
.getGenericSuperclass());
// @formatter:off
List<Person> personListExpected = Arrays.asList(
new Person(1, "Jhon", "jhon@test.com", 20, LocalDate.of(2019, 9, 9), BigDecimal.valueOf(1000)),
new Person(2, "Jhon", "jhon1@test.com", 20, LocalDate.of(2019, 9, 9), BigDecimal.valueOf(1500)),
new Person(3, "Jhon", null, 20, LocalDate.of(2019, 9, 9), BigDecimal.valueOf(1000)),
new Person(4, "Tom", "tom@test.com", 21, LocalDate.of(2019, 9, 9), BigDecimal.valueOf(1500)));
// @formatter:on
assertTrue(ListUtils.isEqualList(personList, personListExpected));
}
@Test
public void givenPersonObject_whenNamingStrategy_thenGetCustomPersonJson() {
JsonbConfig config = new JsonbConfig().withPropertyNamingStrategy(PropertyNamingStrategy.LOWER_CASE_WITH_UNDERSCORES);
Jsonb jsonb = JsonbBuilder.create(config);
Person person = new Person(1, "Jhon", "jhon@test.com", 20, LocalDate.of(2019, 9, 7), BigDecimal.valueOf(1000));
String jsonPerson = jsonb.toJson(person);
// @formatter:off
String jsonExpected =
"{\"email\":\"jhon@test.com\"," +
"\"id\":1," +
"\"person-name\":\"Jhon\"," +
"\"registered_date\":\"07-09-2019\"," +
"\"salary\":\"1000.0\"}";
// @formatter:on
assertTrue(jsonExpected.equals(jsonPerson));
}
@Test
public void givenPersonObject_whenWithPropertyOrderStrategy_thenGetReversePersonJson() {
JsonbConfig config = new JsonbConfig().withPropertyOrderStrategy(PropertyOrderStrategy.REVERSE);
Jsonb jsonb = JsonbBuilder.create(config);
Person person = new Person(1, "Jhon", "jhon@test.com", 20, LocalDate.of(2019, 9, 7), BigDecimal.valueOf(1000));
String jsonPerson = jsonb.toJson(person);
// @formatter:off
String jsonExpected =
"{\"salary\":\"1000.0\","+
"\"registeredDate\":\"07-09-2019\"," +
"\"person-name\":\"Jhon\"," +
"\"id\":1," +
"\"email\":\"jhon@test.com\"}";
// @formatter:on
assertTrue(jsonExpected.equals(jsonPerson));
}
@Test
public void givenPersonObject_whenSerializeWithJsonb_thenGetPersonJson() {
Jsonb jsonb = JsonbBuilder.create();
Person person = new Person(1, "Jhon", "jhon@test.com", 20, LocalDate.of(2019, 9, 7), BigDecimal.valueOf(1000));
String jsonPerson = jsonb.toJson(person);
// @formatter:off
String jsonExpected =
"{\"email\":\"jhon@test.com\"," +
"\"id\":1," +
"\"person-name\":\"Jhon\"," +
"\"registeredDate\":\"07-09-2019\"," +
"\"salary\":\"1000.0\"}";
// @formatter:on
assertTrue(jsonExpected.equals(jsonPerson));
}
@Test
public void givenPersonJson_whenDeserializeWithJsonb_thenGetPersonObject() {
Jsonb jsonb = JsonbBuilder.create();
Person person = new Person(1, "Jhon", "jhon@test.com", 0, LocalDate.of(2019, 9, 7), BigDecimal.valueOf(1000.0));
// @formatter:off
String jsonPerson =
"{\"email\":\"jhon@test.com\"," +
"\"id\":1," +
"\"person-name\":\"Jhon\"," +
"\"registeredDate\":\"07-09-2019\"," +
"\"salary\":\"1000.0\"}";
// @formatter:on
assertTrue(jsonb.fromJson(jsonPerson, Person.class)
.equals(person));
}
}

25
patterns/template-method/src/main/java/com/baeldung/templatemethodpattern/model/Computer.java
View File

@ -1,33 +1,32 @@
package com.baeldung.templatemethodpattern.model;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.HashMap;
import java.util.Map;
public abstract class Computer {
protected Map<String, String> computerParts = new HashMap<>();
protected List<String> moterboardSetupStatus = new ArrayList<>();
public final void buildComputer() {
addMotherboard();
addMotherboard();
setupMotherboard();
addProcessor();
addMemory();
addHardDrive();
addGraphicCard();
addSoundCard();
}
public abstract void addProcessor();
public abstract void addMotherboard();
public abstract void addMemory();
public abstract void setupMotherboard();
public abstract void addHardDrive();
public abstract void addGraphicCard();
public abstract void addSoundCard();
public abstract void addProcessor();
public List<String> getMotherboardSetupStatus() {
return moterboardSetupStatus;
}
public Map<String, String> getComputerParts() {
return computerParts;
}

38
patterns/template-method/src/main/java/com/baeldung/templatemethodpattern/model/HighEndComputer.java
View File

@ -3,32 +3,24 @@ package com.baeldung.templatemethodpattern.model;
public class HighEndComputer extends Computer {
@Override
public void addProcessor() {
computerParts.put("Processor", "High End Processor");
public void addMotherboard() {
computerParts.put("Motherboard", "High-end Motherboard");
}
@Override
public void setupMotherboard() {
moterboardSetupStatus.add("Screwing the high-end motherboard to the case.");
moterboardSetupStatus.add("Pluging in the power supply connectors.");
moterboardSetupStatus.forEach(step -> System.out.println(step));
}
@Override
public void addProcessor() {
computerParts.put("Processor", "High-end Processor");
}
@Override
public void addMotherboard() {
computerParts.put("Motherboard", "High End Motherboard");
}
@Override
public void addMemory() {
computerParts.put("Memory", "16GB");
}
@Override
public void addHardDrive() {
computerParts.put("Hard Drive", "2TB Hard Drive");
}
@Override
public void addGraphicCard() {
computerParts.put("Graphic Card", "High End Graphic Card");
}
@Override
public void addSoundCard() {
computerParts.put("Sound Card", "High End Sound Card");
}
}

33
patterns/template-method/src/main/java/com/baeldung/templatemethodpattern/model/StandardComputer.java
View File

@ -1,7 +1,18 @@
package com.baeldung.templatemethodpattern.model;
public class StandardComputer extends Computer {
public void addMotherboard() {
computerParts.put("Motherboard", "Standard Motherboard");
}
@Override
public void setupMotherboard() {
moterboardSetupStatus.add("Screwing the standard motherboard to the case.");
moterboardSetupStatus.add("Pluging in the power supply connectors.");
moterboardSetupStatus.forEach(step -> System.out.println(step));
}
@Override
public void addProcessor() {
computerParts.put("Processor", "Standard Processor");
@ -11,24 +22,4 @@ public class StandardComputer extends Computer {
public void addMotherboard() {
computerParts.put("Motherboard", "Standard Motherboard");
}
@Override
public void addMemory() {
computerParts.put("Memory", "8GB");
}
@Override
public void addHardDrive() {
computerParts.put("Hard Drive", "1TB Hard Drive");
}
@Override
public void addGraphicCard() {
computerParts.put("Graphic Card", "Standard Graphic Card");
}
@Override
public void addSoundCard() {
computerParts.put("Sound Card", "Standard Sound Card");
}
}

116
patterns/template-method/src/test/java/com/baeldung/templatemethodpatterntest/TemplateMethodPatternTest.java
View File

@ -3,11 +3,12 @@ package com.baeldung.templatemethodpatterntest;
import com.baeldung.templatemethodpattern.model.HighEndComputer;
import com.baeldung.templatemethodpattern.model.StandardComputer;
import org.junit.Assert;
import static org.junit.Assert.assertEquals;
import org.junit.BeforeClass;
import org.junit.Test;
public class TemplateMethodPatternTest {
private static StandardComputer standardComputer;
private static HighEndComputer highEndComputer;
@ -20,101 +21,54 @@ public class TemplateMethodPatternTest {
public static void setUpHighEndComputerInstance() {
highEndComputer = new HighEndComputer();
}
@Test
public void givenStandardMotherBoard_whenAddingMotherBoard_thenEqualAssertion() {
standardComputer.addMotherboard();
assertEquals("Standard Motherboard", standardComputer.getComputerParts().get("Motherboard"));
}
@Test
public void givenStandardMotheroboard_whenSetup_thenTwoEqualAssertions() {
standardComputer.setupMotherboard();
assertEquals("Screwing the standard motherboard to the case.", standardComputer.getMotherboardSetupStatus().get(0));
assertEquals("Plugin in the power supply connectors.", standardComputer.getMotherboardSetupStatus().get(1));
}
@Test
public void givenStandardProcessor_whenAddingProcessor_thenEqualAssertion() {
standardComputer.addProcessor();
Assert.assertEquals("Standard Processor", standardComputer
.getComputerParts().get("Processor"));
assertEquals("Standard Processor", standardComputer.getComputerParts().get("Processor"));
}
@Test
public void givenStandardMotherBoard_whenAddingMotherBoard_thenEqualAssertion() {
standardComputer.addMotherboard();
Assert.assertEquals("Standard Motherboard", standardComputer
.getComputerParts().get("Motherboard"));
}
@Test
public void givenStandardMemory_whenAddingMemory_thenEqualAssertion() {
standardComputer.addMemory();
Assert.assertEquals("8GB", standardComputer
.getComputerParts().get("Memory"));
}
@Test
public void givenStandardHardDrive_whenAddingHardDrive_thenEqualAssertion() {
standardComputer.addHardDrive();
Assert.assertEquals("1TB Hard Drive", standardComputer
.getComputerParts().get("Hard Drive"));
}
@Test
public void givenStandardGraphicaCard_whenAddingGraphicCard_thenEqualAssertion() {
standardComputer.addGraphicCard();
Assert.assertEquals("Standard Graphic Card", standardComputer
.getComputerParts().get("Graphic Card"));
}
@Test
public void givenStandardSoundCard_whenAddingSoundCard_thenEqualAssertion() {
standardComputer.addSoundCard();
Assert.assertEquals("Standard Sound Card", standardComputer
.getComputerParts().get("Sound Card"));
}
@Test
public void givenAllStandardParts_whenBuildingComputer_thenSixParts() {
public void givenAllStandardParts_whenBuildingComputer_thenTwoParts() {
standardComputer.buildComputer();
Assert.assertEquals(6, standardComputer
.getComputerParts().size());
assertEquals(2, standardComputer.getComputerParts().size());
}
@Test
public void givenHighEnddMotherBoard_whenAddingMotherBoard_thenEqualAssertion() {
highEndComputer.addMotherboard();
Assert.assertEquals("High-end Motherboard", highEndComputer.getComputerParts().get("Motherboard"));
}
@Test
public void givenHighEnddMotheroboard_whenSetup_thenTwoEqualAssertions() {
highEndComputer.setupMotherboard();
assertEquals("Screwing the high-end motherboard to the case.", highEndComputer.getMotherboardSetupStatus().get(0));
assertEquals("Plugin in the power supply connectors.", highEndComputer.getMotherboardSetupStatus().get(1));
}
@Test
public void givenHightEndProcessor_whenAddingProcessor_thenEqualAssertion() {
highEndComputer.addProcessor();
Assert.assertEquals("High End Processor", highEndComputer
.getComputerParts().get("Processor"));
Assert.assertEquals("High-end Processor", highEndComputer.getComputerParts().get("Processor"));
}
@Test
public void givenHighEnddMotherBoard_whenAddingMotherBoard_thenEqualAssertion() {
highEndComputer.addMotherboard();
Assert.assertEquals("High End Motherboard", highEndComputer
.getComputerParts().get("Motherboard"));
}
@Test
public void givenHighEndMemory_whenAddingMemory_thenEqualAssertion() {
highEndComputer.addMemory();
Assert.assertEquals("16GB", highEndComputer
.getComputerParts().get("Memory"));
}
@Test
public void givenHighEndHardDrive_whenAddingHardDrive_thenEqualAssertion() {
highEndComputer.addHardDrive();
Assert.assertEquals("2TB Hard Drive", highEndComputer
.getComputerParts().get("Hard Drive"));
}
@Test
public void givenHighEndGraphicCard_whenAddingGraphicCard_thenEqualAssertion() {
highEndComputer.addGraphicCard();
Assert.assertEquals("High End Graphic Card", highEndComputer
.getComputerParts().get("Graphic Card"));
}
@Test
public void givenHighEndSoundCard_whenAddingSoundCard_thenEqualAssertion() {
highEndComputer.addSoundCard();
Assert.assertEquals("High End Sound Card", highEndComputer
.getComputerParts().get("Sound Card"));
}
@Test
public void givenAllHighEndParts_whenBuildingComputer_thenSixParts() {
public void givenAllHighEnddParts_whenBuildingComputer_thenTwoParts() {
highEndComputer.buildComputer();
Assert.assertEquals(6, highEndComputer.getComputerParts().size());
assertEquals(2, highEndComputer.getComputerParts().size());
}
}

19
spring-5/pom.xml
View File

@ -49,6 +49,18 @@
<artifactId>javax.json.bind-api</artifactId>
<version>${jsonb-api.version}</version>
</dependency>
<!-- Dependencies for Yasson -->
<!-- <dependency> -->
<!-- <groupId>org.eclipse</groupId> -->
<!-- <artifactId>yasson</artifactId> -->
<!-- <version>1.0</version> -->
<!-- </dependency> -->
<!-- <dependency> -->
<!-- <groupId>org.glassfish</groupId> -->
<!-- <artifactId>javax.json</artifactId> -->
<!-- <version>1.1.2</version> -->
<!-- </dependency> -->
<!-- Dependencies for Johnzon -->
<dependency>
<groupId>org.apache.geronimo.specs</groupId>
<artifactId>geronimo-json_1.1_spec</artifactId>
@ -88,6 +100,13 @@
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-collections4</artifactId>
<version>4.1</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.junit.jupiter</groupId>
<artifactId>junit-jupiter-api</artifactId>

38
spring-5/src/test/java/com/baeldung/jsonb/JsonbTest.java
View File

@ -1,38 +0,0 @@
package com.baeldung.jsonb;
import static org.junit.Assert.assertTrue;
import java.math.BigDecimal;
import java.time.LocalDate;
import javax.json.bind.Jsonb;
import javax.json.bind.JsonbBuilder;
import org.junit.Before;
import org.junit.Test;
public class JsonbTest {
private Jsonb jsonb;
@Before
public void setup() {
jsonb = JsonbBuilder.create();
}
@Test
public void givenPersonObject_whenSerializeWithJsonb_thenGetPersonJson() {
Person person = new Person(1, "Jhon", "jhon@test.com", 20, LocalDate.of(2019, 9, 7), BigDecimal.valueOf(1000));
String jsonPerson = jsonb.toJson(person);
assertTrue("{\"email\":\"jhon@test.com\",\"id\":1,\"person-name\":\"Jhon\",\"registeredDate\":\"07-09-2019\",\"salary\":\"1000.0\"}".equals(jsonPerson));
}
@Test
public void givenPersonJson_whenDeserializeWithJsonb_thenGetPersonObject() {
Person person = new Person(1, "Jhon", "jhon@test.com", 0, LocalDate.of(2019, 9, 7), BigDecimal.valueOf(1000.0));
String jsonPerson = "{\"email\":\"jhon@test.com\",\"id\":1,\"person-name\":\"Jhon\",\"registeredDate\":\"07-09-2019\",\"salary\":\"1000.0\"}";
assertTrue(jsonb.fromJson(jsonPerson, Person.class)
.equals(person));
}
}

29
spring-boot/src/main/java/org/baeldung/dsrouting/ClientDao.java Normal file
View File

@ -0,0 +1,29 @@
package org.baeldung.dsrouting;
import javax.sql.DataSource;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.jdbc.core.RowMapper;
/**
* Database access code for datasource routing example.
*/
public class ClientDao {
private static final String SQL_GET_CLIENT_NAME = "select name from client";
private final JdbcTemplate jdbcTemplate;
public ClientDao(DataSource datasource) {
this.jdbcTemplate = new JdbcTemplate(datasource);
}
public String getClientName() {
return this.jdbcTemplate.query(SQL_GET_CLIENT_NAME, rowMapper)
.get(0);
}
private static RowMapper<String> rowMapper = (rs, rowNum) -> {
return rs.getString("name");
};
}

14
spring-boot/src/main/java/org/baeldung/dsrouting/ClientDataSourceRouter.java Normal file
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@ -0,0 +1,14 @@
package org.baeldung.dsrouting;
import org.springframework.jdbc.datasource.lookup.AbstractRoutingDataSource;
/**
* Returns thread bound client lookup key for current context.
*/
public class ClientDataSourceRouter extends AbstractRoutingDataSource {
@Override
protected Object determineCurrentLookupKey() {
return ClientDatabaseContextHolder.getClientDatabase();
}
}

7
spring-boot/src/main/java/org/baeldung/dsrouting/ClientDatabase.java Normal file
View File

@ -0,0 +1,7 @@
package org.baeldung.dsrouting;
public enum ClientDatabase {
ACME_WIDGETS, WIDGETS_ARE_US, WIDGET_DEPOT
}

26
spring-boot/src/main/java/org/baeldung/dsrouting/ClientDatabaseContextHolder.java Normal file
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@ -0,0 +1,26 @@
package org.baeldung.dsrouting;
import org.springframework.util.Assert;
/**
* Thread shared context to point to the datasource which should be used. This
* enables context switches between different clients.
*/
public class ClientDatabaseContextHolder {
private static final ThreadLocal<ClientDatabase> CONTEXT = new ThreadLocal<>();
public static void set(ClientDatabase clientDatabase) {
Assert.notNull(clientDatabase, "clientDatabase cannot be null");
CONTEXT.set(clientDatabase);
}
public static ClientDatabase getClientDatabase() {
return CONTEXT.get();
}
public static void clear() {
CONTEXT.remove();
}
}

21
spring-boot/src/main/java/org/baeldung/dsrouting/ClientService.java Normal file
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@ -0,0 +1,21 @@
package org.baeldung.dsrouting;
/**
* Service layer code for datasource routing example. Here, the service methods are responsible
* for setting and clearing the context.
*/
public class ClientService {
private final ClientDao clientDao;
public ClientService(ClientDao clientDao) {
this.clientDao = clientDao;
}
public String getClientName(ClientDatabase clientDb) {
ClientDatabaseContextHolder.set(clientDb);
String clientName = this.clientDao.getClientName();
ClientDatabaseContextHolder.clear();
return clientName;
}
}

64
spring-boot/src/test/java/org/baeldung/dsrouting/DataSourceRoutingTestConfiguration.java Normal file
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@ -0,0 +1,64 @@
package org.baeldung.dsrouting;
import java.util.HashMap;
import java.util.Map;
import javax.sql.DataSource;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.jdbc.datasource.embedded.EmbeddedDatabase;
import org.springframework.jdbc.datasource.embedded.EmbeddedDatabaseBuilder;
import org.springframework.jdbc.datasource.embedded.EmbeddedDatabaseType;
@Configuration
public class DataSourceRoutingTestConfiguration {
@Bean
public ClientService clientService() {
return new ClientService(new ClientDao(clientDatasource()));
}
@Bean
public DataSource clientDatasource() {
Map<Object, Object> targetDataSources = new HashMap<>();
DataSource acmeWidgetsDatasource = acmeWidgetsDatasource();
DataSource widgetsAreUsDatasource = widgetsAreUsDatasource();
DataSource widgetsDepotDatasource = widgetsDepotDatasource();
targetDataSources.put(ClientDatabase.ACME_WIDGETS, acmeWidgetsDatasource);
targetDataSources.put(ClientDatabase.WIDGETS_ARE_US, widgetsAreUsDatasource);
targetDataSources.put(ClientDatabase.WIDGET_DEPOT, widgetsDepotDatasource);
ClientDataSourceRouter clientRoutingDatasource = new ClientDataSourceRouter();
clientRoutingDatasource.setTargetDataSources(targetDataSources);
clientRoutingDatasource.setDefaultTargetDataSource(acmeWidgetsDatasource);
return clientRoutingDatasource;
}
private DataSource acmeWidgetsDatasource() {
EmbeddedDatabaseBuilder dbBuilder = new EmbeddedDatabaseBuilder();
EmbeddedDatabase embeddedDb = dbBuilder.setType(EmbeddedDatabaseType.H2)
.setName("ACMEWIDGETS")
.addScript("classpath:dsrouting-db.sql")
.build();
return embeddedDb;
}
private DataSource widgetsAreUsDatasource() {
EmbeddedDatabaseBuilder dbBuilder = new EmbeddedDatabaseBuilder();
EmbeddedDatabase embeddedDb = dbBuilder.setType(EmbeddedDatabaseType.H2)
.setName("WIDGETSAREUS")
.addScript("classpath:dsrouting-db.sql")
.build();
return embeddedDb;
}
private DataSource widgetsDepotDatasource() {
EmbeddedDatabaseBuilder dbBuilder = new EmbeddedDatabaseBuilder();
EmbeddedDatabase embeddedDb = dbBuilder.setType(EmbeddedDatabaseType.H2)
.setName("WIDGETDEPOT")
.addScript("classpath:dsrouting-db.sql")
.build();
return embeddedDb;
}
}

62
spring-boot/src/test/java/org/baeldung/dsrouting/DataSourceRoutingTests.java Normal file
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@ -0,0 +1,62 @@
package org.baeldung.dsrouting;
import static org.junit.Assert.assertEquals;
import javax.sql.DataSource;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringRunner;
@RunWith(SpringRunner.class)
@ContextConfiguration(classes = DataSourceRoutingTestConfiguration.class)
public class DataSourceRoutingTests {
@Autowired
DataSource routingDatasource;
@Autowired
ClientService clientService;
@Before
public void setup() {
final String SQL_ACME_WIDGETS = "insert into client (id, name) values (1, 'ACME WIDGETS')";
final String SQL_WIDGETS_ARE_US = "insert into client (id, name) values (2, 'WIDGETS ARE US')";
final String SQL_WIDGET_DEPOT = "insert into client (id, name) values (3, 'WIDGET DEPOT')";
JdbcTemplate jdbcTemplate = new JdbcTemplate();
jdbcTemplate.setDataSource(routingDatasource);
ClientDatabaseContextHolder.set(ClientDatabase.ACME_WIDGETS);
jdbcTemplate.execute(SQL_ACME_WIDGETS);
ClientDatabaseContextHolder.clear();
ClientDatabaseContextHolder.set(ClientDatabase.WIDGETS_ARE_US);
jdbcTemplate.execute(SQL_WIDGETS_ARE_US);
ClientDatabaseContextHolder.clear();
ClientDatabaseContextHolder.set(ClientDatabase.WIDGET_DEPOT);
jdbcTemplate.execute(SQL_WIDGET_DEPOT);
ClientDatabaseContextHolder.clear();
}
@Test
public void givenClientDbs_whenContextsSwitch_thenRouteToCorrectDatabase() throws Exception {
// test ACME WIDGETS
String clientName = clientService.getClientName(ClientDatabase.ACME_WIDGETS);
assertEquals(clientName, "ACME WIDGETS");
// test WIDGETS_ARE_US
clientName = clientService.getClientName(ClientDatabase.WIDGETS_ARE_US);
assertEquals(clientName, "WIDGETS ARE US");
// test WIDGET_DEPOT
clientName = clientService.getClientName(ClientDatabase.WIDGET_DEPOT);
assertEquals(clientName, "WIDGET DEPOT");
}
}

5
spring-boot/src/test/resources/dsrouting-db.sql Normal file
View File

@ -0,0 +1,5 @@
create table client (
id numeric,
name varchar(50),
constraint pk_client primary key (id)
);