Merge remote-tracking branch 'upstream/master'

This commit is contained in:
Jose Carvajal 2017-12-04 08:54:40 +01:00
commit 1f1630ae3b
43 changed files with 2722 additions and 735 deletions

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@ -1,258 +1,276 @@
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<profiles>
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<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
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<executions>
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<collections-generic.version>4.01</collections-generic.version>
<commons-codec.version>1.10</commons-codec.version>
<lombok.version>1.16.12</lombok.version>
<!-- testing -->
<assertj.version>3.6.1</assertj.version>
<avaitility.version>1.7.0</avaitility.version>
</properties>
<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>core-java-8</artifactId>
<version>0.1.0-SNAPSHOT</version>
<packaging>jar</packaging>
<name>core-java-8</name>
<parent>
<groupId>com.baeldung</groupId>
<artifactId>parent-modules</artifactId>
<version>1.0.0-SNAPSHOT</version>
</parent>
<dependencies>
<!-- utils -->
<dependency>
<groupId>com.google.guava</groupId>
<artifactId>guava</artifactId>
<version>${guava.version}</version>
</dependency>
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-collections4</artifactId>
<version>${commons-collections4.version}</version>
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<dependency>
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<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-math3</artifactId>
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<groupId>log4j</groupId>
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<dependency>
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<version>${commons-codec.version}</version>
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<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>${lombok.version}</version>
<scope>provided</scope>
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<dependency>
<groupId>org.assertj</groupId>
<artifactId>assertj-core</artifactId>
<version>${assertj.version}</version>
<scope>test</scope>
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<dependency>
<groupId>com.jayway.awaitility</groupId>
<artifactId>awaitility</artifactId>
<version>${avaitility.version}</version>
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implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
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<groupId>com.jolira</groupId>
<artifactId>onejar-maven-plugin</artifactId>
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<configuration>
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<attachToBuild>true</attachToBuild>
<filename>${project.build.finalName}-onejar.${project.packaging}</filename>
</configuration>
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<goal>one-jar</goal>
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<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
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<id>integration</id>
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<artifactId>maven-surefire-plugin</artifactId>
<executions>
<execution>
<phase>integration-test</phase>
<goals>
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<include>**/*IntegrationTest.java</include>
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<test.mime>json</test.mime>
</systemPropertyVariables>
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<guava.version>21.0</guava.version>
<commons-lang3.version>3.5</commons-lang3.version>
<commons-math3.version>3.6.1</commons-math3.version>
<commons-io.version>2.5</commons-io.version>
<commons-collections4.version>4.1</commons-collections4.version>
<collections-generic.version>4.01</collections-generic.version>
<commons-codec.version>1.10</commons-codec.version>
<lombok.version>1.16.12</lombok.version>
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<assertj.version>3.6.1</assertj.version>
<avaitility.version>1.7.0</avaitility.version>
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@ -0,0 +1,45 @@
package com.baeldung.counter;
import java.util.HashMap;
import java.util.Map;
import org.openjdk.jmh.annotations.Benchmark;
import org.openjdk.jmh.annotations.BenchmarkMode;
import org.openjdk.jmh.annotations.Fork;
import org.openjdk.jmh.annotations.Mode;
import com.baeldung.counter.CounterUtil.MutableInteger;
@Fork(value = 1, warmups = 3)
@BenchmarkMode(Mode.All)
public class CounterStatistics {
private static final Map<String, Integer> counterMap = new HashMap<>();
private static final Map<String, MutableInteger> counterWithMutableIntMap = new HashMap<>();
private static final Map<String, int[]> counterWithIntArrayMap = new HashMap<>();
private static final Map<String, Long> counterWithLongWrapperMap = new HashMap<>();
@Benchmark
public void wrapperAsCounter() {
CounterUtil.counterWithWrapperObject(counterMap);
}
@Benchmark
public void lambdaExpressionWithWrapper() {
CounterUtil.counterWithLambdaAndWrapper(counterWithLongWrapperMap);
}
@Benchmark
public void mutableIntegerAsCounter() {
CounterUtil.counterWithMutableInteger(counterWithMutableIntMap);
}
@Benchmark
public void primitiveArrayAsCounter() {
CounterUtil.counterWithPrimitiveArray(counterWithIntArrayMap);
}
public static void main(String[] args) throws Exception {
org.openjdk.jmh.Main.main(args);
}
}

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@ -0,0 +1,53 @@
package com.baeldung.counter;
import java.util.HashMap;
import java.util.Map;
import static org.junit.Assert.*;
import org.junit.Test;
import com.baeldung.counter.CounterUtil.MutableInteger;
public class CounterTest {
@Test
public void whenMapWithWrapperAsCounter_runsSuccessfully() {
Map<String, Integer> counterMap = new HashMap<>();
CounterUtil.counterWithWrapperObject(counterMap);
assertEquals(3, counterMap.get("China")
.intValue());
assertEquals(2, counterMap.get("India")
.intValue());
}
@Test
public void whenMapWithLambdaAndWrapperCounter_runsSuccessfully() {
Map<String, Long> counterMap = new HashMap<>();
CounterUtil.counterWithLambdaAndWrapper(counterMap);
assertEquals(3l, counterMap.get("China")
.longValue());
assertEquals(2l, counterMap.get("India")
.longValue());
}
@Test
public void whenMapWithMutableIntegerCounter_runsSuccessfully() {
Map<String, MutableInteger> counterMap = new HashMap<>();
CounterUtil.counterWithMutableInteger(counterMap);
assertEquals(3, counterMap.get("China")
.getCount());
assertEquals(2, counterMap.get("India")
.getCount());
}
@Test
public void whenMapWithPrimitiveArray_runsSuccessfully() {
Map<String, int[]> counterMap = new HashMap<>();
CounterUtil.counterWithPrimitiveArray(counterMap);
assertEquals(3, counterMap.get("China")[0]);
assertEquals(2, counterMap.get("India")[0]);
}
}

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@ -0,0 +1,61 @@
package com.baeldung.counter;
import java.util.Map;
import java.util.stream.Collectors;
import java.util.stream.Stream;
public class CounterUtil {
private final static String[] COUNTRY_NAMES = { "China", "Australia", "India", "USA", "USSR", "UK", "China", "France", "Poland", "Austria", "India", "USA", "Egypt", "China" };
public static void counterWithWrapperObject(Map<String, Integer> counterMap) {
for (String country : COUNTRY_NAMES) {
counterMap.compute(country, (k, v) -> v == null ? 1 : v + 1);
}
}
public static void counterWithLambdaAndWrapper(Map<String, Long> counterMap) {
counterMap.putAll(Stream.of(COUNTRY_NAMES)
.parallel()
.collect(Collectors.groupingBy(k -> k, Collectors.counting())));
}
public static class MutableInteger {
int count;
public MutableInteger(int count) {
this.count = count;
}
public void increment() {
this.count++;
}
public int getCount() {
return this.count;
}
}
public static void counterWithMutableInteger(Map<String, MutableInteger> counterMap) {
for (String country : COUNTRY_NAMES) {
MutableInteger oldValue = counterMap.get(country);
if (oldValue != null) {
oldValue.increment();
} else {
counterMap.put(country, new MutableInteger(1));
}
}
}
public static void counterWithPrimitiveArray(Map<String, int[]> counterMap) {
for (String country : COUNTRY_NAMES) {
int[] oldCounter = counterMap.get(country);
if (oldCounter != null) {
oldCounter[0] += 1;
} else {
counterMap.put(country, new int[] { 1 });
}
}
}
}

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@ -120,4 +120,5 @@
- [Guide to Java String Pool](http://www.baeldung.com/java-string-pool)
- [Copy a File with Java](http://www.baeldung.com/java-copy-file)
- [Introduction to Creational Design Patterns](http://www.baeldung.com/creational-design-patterns)
- [Quick Example - Comparator vs Comparable in Java](http://www.baeldung.com/java-comparator-comparable)

95
core-java/customers.xml Normal file
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@ -0,0 +1,95 @@
<?xml version="1.0"?>
<webRowSet xmlns="http://java.sun.com/xml/ns/jdbc" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/jdbc http://java.sun.com/xml/ns/jdbc/webrowset.xsd">
<properties>
<command>SELECT * FROM customers</command>
<concurrency>1008</concurrency>
<datasource><null/></datasource>
<escape-processing>true</escape-processing>
<fetch-direction>1000</fetch-direction>
<fetch-size>0</fetch-size>
<isolation-level>2</isolation-level>
<key-columns>
</key-columns>
<map>
</map>
<max-field-size>0</max-field-size>
<max-rows>0</max-rows>
<query-timeout>0</query-timeout>
<read-only>true</read-only>
<rowset-type>ResultSet.TYPE_SCROLL_INSENSITIVE</rowset-type>
<show-deleted>false</show-deleted>
<table-name>customers</table-name>
<url>jdbc:h2:mem:testdb</url>
<sync-provider>
<sync-provider-name>com.sun.rowset.providers.RIOptimisticProvider</sync-provider-name>
<sync-provider-vendor>Oracle Corporation</sync-provider-vendor>
<sync-provider-version>1.0</sync-provider-version>
<sync-provider-grade>2</sync-provider-grade>
<data-source-lock>1</data-source-lock>
</sync-provider>
</properties>
<metadata>
<column-count>2</column-count>
<column-definition>
<column-index>1</column-index>
<auto-increment>false</auto-increment>
<case-sensitive>true</case-sensitive>
<currency>false</currency>
<nullable>0</nullable>
<signed>true</signed>
<searchable>true</searchable>
<column-display-size>11</column-display-size>
<column-label>ID</column-label>
<column-name>ID</column-name>
<schema-name>PUBLIC</schema-name>
<column-precision>10</column-precision>
<column-scale>0</column-scale>
<table-name>CUSTOMERS</table-name>
<catalog-name>TESTDB</catalog-name>
<column-type>4</column-type>
<column-type-name>INTEGER</column-type-name>
</column-definition>
<column-definition>
<column-index>2</column-index>
<auto-increment>false</auto-increment>
<case-sensitive>true</case-sensitive>
<currency>false</currency>
<nullable>0</nullable>
<signed>true</signed>
<searchable>true</searchable>
<column-display-size>50</column-display-size>
<column-label>NAME</column-label>
<column-name>NAME</column-name>
<schema-name>PUBLIC</schema-name>
<column-precision>50</column-precision>
<column-scale>0</column-scale>
<table-name>CUSTOMERS</table-name>
<catalog-name>TESTDB</catalog-name>
<column-type>12</column-type>
<column-type-name>VARCHAR</column-type-name>
</column-definition>
</metadata>
<data>
<currentRow>
<columnValue>1</columnValue>
<columnValue>Customer1</columnValue>
</currentRow>
<currentRow>
<columnValue>2</columnValue>
<columnValue>Customer2</columnValue>
</currentRow>
<currentRow>
<columnValue>3</columnValue>
<columnValue>Customer3</columnValue>
</currentRow>
<currentRow>
<columnValue>4</columnValue>
<columnValue>Customer4</columnValue>
</currentRow>
<currentRow>
<columnValue>5</columnValue>
<columnValue>Customer5</columnValue>
</currentRow>
</data>
</webRowSet>

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@ -1,479 +1,496 @@
<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>core-java</artifactId>
<version>0.1.0-SNAPSHOT</version>
<packaging>jar</packaging>
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>core-java</artifactId>
<version>0.1.0-SNAPSHOT</version>
<packaging>jar</packaging>
<name>core-java</name>
<name>core-java</name>
<dependencies>
<dependencies>
<!-- utils -->
<dependency>
<groupId>net.sourceforge.collections</groupId>
<artifactId>collections-generic</artifactId>
<version>${collections-generic.version}</version>
</dependency>
<dependency>
<groupId>com.google.guava</groupId>
<artifactId>guava</artifactId>
<version>${guava.version}</version>
</dependency>
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-collections4</artifactId>
<version>${commons-collections4.version}</version>
</dependency>
<dependency>
<groupId>commons-io</groupId>
<artifactId>commons-io</artifactId>
<version>${commons-io.version}</version>
</dependency>
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-lang3</artifactId>
<version>${commons-lang3.version}</version>
</dependency>
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-math3</artifactId>
<version>${commons-math3.version}</version>
</dependency>
<dependency>
<groupId>org.decimal4j</groupId>
<artifactId>decimal4j</artifactId>
<version>${decimal4j.version}</version>
</dependency>
<dependency>
<groupId>org.bouncycastle</groupId>
<artifactId>bcprov-jdk15on</artifactId>
<version>${bouncycastle.version}</version>
</dependency>
<dependency>
<groupId>org.unix4j</groupId>
<artifactId>unix4j-command</artifactId>
<version>${unix4j.version}</version>
</dependency>
<dependency>
<groupId>com.googlecode.grep4j</groupId>
<artifactId>grep4j</artifactId>
<version>${grep4j.version}</version>
</dependency>
<!-- web -->
<!-- marshalling -->
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>${jackson.version}</version>
</dependency>
<!-- logging -->
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.17</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>${org.slf4j.version}</version>
</dependency>
<dependency>
<groupId>ch.qos.logback</groupId>
<artifactId>logback-classic</artifactId>
<version>${logback.version}</version>
<!-- <scope>runtime</scope> -->
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>jcl-over-slf4j</artifactId>
<version>${org.slf4j.version}</version>
<!-- <scope>runtime</scope> --> <!-- some spring dependencies need to compile against jcl -->
</dependency>
<dependency> <!-- needed to bridge to slf4j for projects that use the log4j APIs directly -->
<groupId>org.slf4j</groupId>
<artifactId>log4j-over-slf4j</artifactId>
<version>${org.slf4j.version}</version>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>${lombok.version}</version>
<scope>provided</scope>
</dependency>
<!-- test scoped -->
<dependency>
<groupId>org.hamcrest</groupId>
<artifactId>hamcrest-all</artifactId>
<version>1.3</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>${junit.version}</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.hamcrest</groupId>
<artifactId>hamcrest-core</artifactId>
<version>${org.hamcrest.version}</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.hamcrest</groupId>
<artifactId>hamcrest-library</artifactId>
<version>${org.hamcrest.version}</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.assertj</groupId>
<artifactId>assertj-core</artifactId>
<version>${assertj.version}</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.mockito</groupId>
<artifactId>mockito-core</artifactId>
<version>${mockito.version}</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>com.jayway.awaitility</groupId>
<artifactId>awaitility</artifactId>
<version>${avaitility.version}</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>commons-codec</groupId>
<artifactId>commons-codec</artifactId>
<version>${commons-codec.version}</version>
</dependency>
<dependency>
<groupId>org.javamoney</groupId>
<artifactId>moneta</artifactId>
<version>1.1</version>
</dependency>
<dependency>
<groupId>org.owasp.esapi</groupId>
<artifactId>esapi</artifactId>
<version>2.1.0.1</version>
</dependency>
<dependency>
<groupId>com.codepoetics</groupId>
<artifactId>protonpack</artifactId>
<version>${protonpack.version}</version>
</dependency>
<dependency>
<groupId>one.util</groupId>
<artifactId>streamex</artifactId>
<version>${streamex.version}</version>
</dependency>
<dependency>
<groupId>io.vavr</groupId>
<artifactId>vavr</artifactId>
<version>${vavr.version}</version>
</dependency>
<dependency>
<groupId>org.openjdk.jmh</groupId>
<artifactId>jmh-core</artifactId>
<version>1.19</version>
</dependency>
<dependency>
<groupId>org.openjdk.jmh</groupId>
<artifactId>jmh-generator-annprocess</artifactId>
<version>1.19</version>
</dependency>
<!-- utils -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>4.3.4.RELEASE</version>
<groupId>net.sourceforge.collections</groupId>
<artifactId>collections-generic</artifactId>
<version>${collections-generic.version}</version>
</dependency>
<dependency>
<groupId>com.google.guava</groupId>
<artifactId>guava</artifactId>
<version>${guava.version}</version>
</dependency>
</dependencies>
<build>
<finalName>core-java</finalName>
<resources>
<resource>
<directory>src/main/resources</directory>
<filtering>true</filtering>
</resource>
</resources>
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-collections4</artifactId>
<version>${commons-collections4.version}</version>
</dependency>
<plugins>
<dependency>
<groupId>commons-io</groupId>
<artifactId>commons-io</artifactId>
<version>${commons-io.version}</version>
</dependency>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>${maven-compiler-plugin.version}</version>
<configuration>
<source>1.8</source>
<target>1.8</target>
</configuration>
</plugin>
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-lang3</artifactId>
<version>${commons-lang3.version}</version>
</dependency>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin</artifactId>
<configuration>
<excludes>
<exclude>**/*LiveTest.java</exclude>
<exclude>**/*IntegrationTest.java</exclude>
<exclude>**/*LongRunningUnitTest.java</exclude>
<exclude>**/*ManualTest.java</exclude>
</excludes>
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-math3</artifactId>
<version>${commons-math3.version}</version>
</dependency>
</configuration>
</plugin>
<dependency>
<groupId>org.decimal4j</groupId>
<artifactId>decimal4j</artifactId>
<version>${decimal4j.version}</version>
</dependency>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-dependency-plugin</artifactId>
<executions>
<execution>
<id>copy-dependencies</id>
<phase>prepare-package</phase>
<goals>
<goal>copy-dependencies</goal>
</goals>
<configuration>
<outputDirectory>${project.build.directory}/libs</outputDirectory>
</configuration>
</execution>
</executions>
</plugin>
<dependency>
<groupId>org.bouncycastle</groupId>
<artifactId>bcprov-jdk15on</artifactId>
<version>${bouncycastle.version}</version>
</dependency>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-jar-plugin</artifactId>
<configuration>
<archive>
<manifest>
<addClasspath>true</addClasspath>
<classpathPrefix>libs/</classpathPrefix>
<mainClass>org.baeldung.executable.ExecutableMavenJar</mainClass>
</manifest>
</archive>
</configuration>
</plugin>
<dependency>
<groupId>org.unix4j</groupId>
<artifactId>unix4j-command</artifactId>
<version>${unix4j.version}</version>
</dependency>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-assembly-plugin</artifactId>
<executions>
<execution>
<phase>package</phase>
<goals>
<goal>single</goal>
</goals>
<configuration>
<archiveBaseDirectory>${project.basedir}</archiveBaseDirectory>
<archive>
<manifest>
<mainClass>org.baeldung.executable.ExecutableMavenJar</mainClass>
</manifest>
</archive>
<descriptorRefs>
<descriptorRef>jar-with-dependencies</descriptorRef>
</descriptorRefs>
</configuration>
</execution>
</executions>
</plugin>
<dependency>
<groupId>com.googlecode.grep4j</groupId>
<artifactId>grep4j</artifactId>
<version>${grep4j.version}</version>
</dependency>
<!-- web -->
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-shade-plugin</artifactId>
<executions>
<execution>
<goals>
<goal>shade</goal>
</goals>
<configuration>
<shadedArtifactAttached>true</shadedArtifactAttached>
<transformers>
<transformer
implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
<mainClass>org.baeldung.executable.ExecutableMavenJar</mainClass>
</transformer>
</transformers>
</configuration>
</execution>
</executions>
</plugin>
<!-- marshalling -->
<plugin>
<groupId>com.jolira</groupId>
<artifactId>onejar-maven-plugin</artifactId>
<executions>
<execution>
<configuration>
<mainClass>org.baeldung.executable.ExecutableMavenJar</mainClass>
<attachToBuild>true</attachToBuild>
<filename>${project.build.finalName}-onejar.${project.packaging}</filename>
</configuration>
<goals>
<goal>one-jar</goal>
</goals>
</execution>
</executions>
</plugin>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>${jackson.version}</version>
</dependency>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<executions>
<execution>
<goals>
<goal>repackage</goal>
</goals>
<configuration>
<classifier>spring-boot</classifier>
<mainClass>org.baeldung.executable.ExecutableMavenJar</mainClass>
</configuration>
</execution>
</executions>
</plugin>
<!-- logging -->
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.17</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>${org.slf4j.version}</version>
</dependency>
<dependency>
<groupId>ch.qos.logback</groupId>
<artifactId>logback-classic</artifactId>
<version>${logback.version}</version>
<!-- <scope>runtime</scope> -->
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>jcl-over-slf4j</artifactId>
<version>${org.slf4j.version}</version>
<!-- <scope>runtime</scope> --> <!-- some spring dependencies need to compile against jcl -->
</dependency>
<dependency> <!-- needed to bridge to slf4j for projects that use the log4j APIs directly -->
<groupId>org.slf4j</groupId>
<artifactId>log4j-over-slf4j</artifactId>
<version>${org.slf4j.version}</version>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>${lombok.version}</version>
<scope>provided</scope>
</dependency>
<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>exec-maven-plugin</artifactId>
<version>1.6.0</version>
<configuration>
<executable>java</executable>
<mainClass>com.baeldung.outofmemoryerror.OutOfMemoryGCLimitExceed</mainClass>
<arguments>
<argument>-Xmx300m</argument>
<argument>-XX:+UseParallelGC</argument>
<argument>-classpath</argument>
<classpath/>
<argument>com.baeldung.outofmemoryerror.OutOfMemoryGCLimitExceed</argument>
</arguments>
</configuration>
</plugin>
<!-- test scoped -->
<dependency>
<groupId>org.hamcrest</groupId>
<artifactId>hamcrest-all</artifactId>
<version>1.3</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>${junit.version}</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.hamcrest</groupId>
<artifactId>hamcrest-core</artifactId>
<version>${org.hamcrest.version}</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.hamcrest</groupId>
<artifactId>hamcrest-library</artifactId>
<version>${org.hamcrest.version}</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.assertj</groupId>
<artifactId>assertj-core</artifactId>
<version>${assertj.version}</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.mockito</groupId>
<artifactId>mockito-core</artifactId>
<version>${mockito.version}</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>com.jayway.awaitility</groupId>
<artifactId>awaitility</artifactId>
<version>${avaitility.version}</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>commons-codec</groupId>
<artifactId>commons-codec</artifactId>
<version>${commons-codec.version}</version>
</dependency>
<dependency>
<groupId>org.javamoney</groupId>
<artifactId>moneta</artifactId>
<version>1.1</version>
</dependency>
<dependency>
<groupId>org.owasp.esapi</groupId>
<artifactId>esapi</artifactId>
<version>2.1.0.1</version>
</dependency>
<dependency>
<groupId>com.h2database</groupId>
<artifactId>h2</artifactId>
<version>1.4.196</version>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>com.sun.messaging.mq</groupId>
<artifactId>fscontext</artifactId>
<version>${fscontext.version}</version>
</dependency>
<dependency>
<groupId>com.codepoetics</groupId>
<artifactId>protonpack</artifactId>
<version>${protonpack.version}</version>
</dependency>
<dependency>
<groupId>one.util</groupId>
<artifactId>streamex</artifactId>
<version>${streamex.version}</version>
</dependency>
<dependency>
<groupId>io.vavr</groupId>
<artifactId>vavr</artifactId>
<version>${vavr.version}</version>
</dependency>
<dependency>
<groupId>org.openjdk.jmh</groupId>
<artifactId>jmh-core</artifactId>
<version>1.19</version>
</dependency>
<dependency>
<groupId>org.openjdk.jmh</groupId>
<artifactId>jmh-generator-annprocess</artifactId>
<version>1.19</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>4.3.4.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
<version>1.5.8.RELEASE</version>
</dependency>
</dependencies>
<build>
<finalName>core-java</finalName>
<resources>
<resource>
<directory>src/main/resources</directory>
<filtering>true</filtering>
</resource>
</resources>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>${maven-compiler-plugin.version}</version>
<configuration>
<source>1.8</source>
<target>1.8</target>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin</artifactId>
<configuration>
<excludes>
<exclude>**/*LiveTest.java</exclude>
<exclude>**/*IntegrationTest.java</exclude>
<exclude>**/*LongRunningUnitTest.java</exclude>
<exclude>**/*ManualTest.java</exclude>
</excludes>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-dependency-plugin</artifactId>
<executions>
<execution>
<id>copy-dependencies</id>
<phase>prepare-package</phase>
<goals>
<goal>copy-dependencies</goal>
</goals>
<configuration>
<outputDirectory>${project.build.directory}/libs</outputDirectory>
</configuration>
</execution>
</executions>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-jar-plugin</artifactId>
<configuration>
<archive>
<manifest>
<addClasspath>true</addClasspath>
<classpathPrefix>libs/</classpathPrefix>
<mainClass>org.baeldung.executable.ExecutableMavenJar</mainClass>
</manifest>
</archive>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-assembly-plugin</artifactId>
<executions>
<execution>
<phase>package</phase>
<goals>
<goal>single</goal>
</goals>
<configuration>
<archiveBaseDirectory>${project.basedir}</archiveBaseDirectory>
<archive>
<manifest>
<mainClass>org.baeldung.executable.ExecutableMavenJar</mainClass>
</manifest>
</archive>
<descriptorRefs>
<descriptorRef>jar-with-dependencies</descriptorRef>
</descriptorRefs>
</configuration>
</execution>
</executions>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-shade-plugin</artifactId>
<executions>
<execution>
<goals>
<goal>shade</goal>
</goals>
<configuration>
<shadedArtifactAttached>true</shadedArtifactAttached>
<transformers>
<transformer
implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
<mainClass>org.baeldung.executable.ExecutableMavenJar</mainClass>
</transformer>
</transformers>
</configuration>
</execution>
</executions>
</plugin>
<plugin>
<groupId>com.jolira</groupId>
<artifactId>onejar-maven-plugin</artifactId>
<executions>
<execution>
<configuration>
<mainClass>org.baeldung.executable.ExecutableMavenJar</mainClass>
<attachToBuild>true</attachToBuild>
<filename>${project.build.finalName}-onejar.${project.packaging}</filename>
</configuration>
<goals>
<goal>one-jar</goal>
</goals>
</execution>
</executions>
</plugin>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<executions>
<execution>
<goals>
<goal>repackage</goal>
</goals>
<configuration>
<classifier>spring-boot</classifier>
<mainClass>org.baeldung.executable.ExecutableMavenJar</mainClass>
</configuration>
</execution>
</executions>
</plugin>
<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>exec-maven-plugin</artifactId>
<version>1.6.0</version>
<configuration>
<executable>java</executable>
<mainClass>com.baeldung.outofmemoryerror.OutOfMemoryGCLimitExceed</mainClass>
<arguments>
<argument>-Xmx300m</argument>
<argument>-XX:+UseParallelGC</argument>
<argument>-classpath</argument>
<classpath />
<argument>com.baeldung.outofmemoryerror.OutOfMemoryGCLimitExceed</argument>
</arguments>
</configuration>
</plugin>
</plugins>
</plugins>
</build>
</build>
<profiles>
<profile>
<id>integration</id>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin</artifactId>
<executions>
<execution>
<phase>integration-test</phase>
<goals>
<goal>test</goal>
</goals>
<configuration>
<excludes>
<exclude>**/*ManualTest.java</exclude>
</excludes>
<includes>
<include>**/*IntegrationTest.java</include>
</includes>
</configuration>
</execution>
</executions>
<configuration>
<systemPropertyVariables>
<test.mime>json</test.mime>
</systemPropertyVariables>
</configuration>
</plugin>
<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>exec-maven-plugin</artifactId>
<profiles>
<profile>
<id>integration</id>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin</artifactId>
<executions>
<execution>
<phase>integration-test</phase>
<goals>
<goal>test</goal>
</goals>
<configuration>
<excludes>
<exclude>**/*ManualTest.java</exclude>
</excludes>
<includes>
<include>**/*IntegrationTest.java</include>
</includes>
</configuration>
</execution>
</executions>
<configuration>
<systemPropertyVariables>
<test.mime>json</test.mime>
</systemPropertyVariables>
</configuration>
</plugin>
<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>exec-maven-plugin</artifactId>
<executions>
<execution>
<id>run-benchmarks</id>
<!-- <phase>integration-test</phase>-->
<phase>none</phase>
<goals>
<goal>exec</goal>
</goals>
<configuration>
<classpathScope>test</classpathScope>
<executable>java</executable>
<arguments>
<argument>-classpath</argument>
<classpath/>
<argument>org.openjdk.jmh.Main</argument>
<argument>.*</argument>
</arguments>
</configuration>
</execution>
</executions>
</plugin>
</plugins>
</build>
</profile>
</profiles>
<executions>
<execution>
<id>run-benchmarks</id>
<!-- <phase>integration-test</phase> -->
<phase>none</phase>
<goals>
<goal>exec</goal>
</goals>
<configuration>
<classpathScope>test</classpathScope>
<executable>java</executable>
<arguments>
<argument>-classpath</argument>
<classpath />
<argument>org.openjdk.jmh.Main</argument>
<argument>.*</argument>
</arguments>
</configuration>
</execution>
</executions>
</plugin>
</plugins>
</build>
</profile>
</profiles>
<properties>
<!-- marshalling -->
<jackson.version>2.8.5</jackson.version>
<properties>
<!-- marshalling -->
<jackson.version>2.8.5</jackson.version>
<!-- logging -->
<org.slf4j.version>1.7.21</org.slf4j.version>
<logback.version>1.1.7</logback.version>
<!-- logging -->
<org.slf4j.version>1.7.21</org.slf4j.version>
<logback.version>1.1.7</logback.version>
<!-- util -->
<guava.version>23.0</guava.version>
<commons-lang3.version>3.5</commons-lang3.version>
<bouncycastle.version>1.55</bouncycastle.version>
<commons-codec.version>1.10</commons-codec.version>
<commons-math3.version>3.6.1</commons-math3.version>
<decimal4j.version>1.0.3</decimal4j.version>
<commons-io.version>2.5</commons-io.version>
<commons-collections4.version>4.1</commons-collections4.version>
<collections-generic.version>4.01</collections-generic.version>
<unix4j.version>0.4</unix4j.version>
<grep4j.version>1.8.7</grep4j.version>
<lombok.version>1.16.12</lombok.version>
<fscontext.version>4.6-b01</fscontext.version>
<protonpack.version>1.13</protonpack.version>
<streamex.version>0.6.5</streamex.version>
<vavr.version>0.9.0</vavr.version>
<!-- testing -->
<org.hamcrest.version>1.3</org.hamcrest.version>
<junit.version>4.12</junit.version>
<mockito.version>2.8.9</mockito.version>
<assertj.version>3.6.1</assertj.version>
<avaitility.version>1.7.0</avaitility.version>
<!-- util -->
<guava.version>22.0</guava.version>
<commons-lang3.version>3.5</commons-lang3.version>
<bouncycastle.version>1.55</bouncycastle.version>
<commons-codec.version>1.10</commons-codec.version>
<commons-math3.version>3.6.1</commons-math3.version>
<decimal4j.version>1.0.3</decimal4j.version>
<commons-io.version>2.5</commons-io.version>
<commons-collections4.version>4.1</commons-collections4.version>
<collections-generic.version>4.01</collections-generic.version>
<unix4j.version>0.4</unix4j.version>
<grep4j.version>1.8.7</grep4j.version>
<lombok.version>1.16.12</lombok.version>
<fscontext.version>4.6-b01</fscontext.version>
<protonpack.version>1.13</protonpack.version>
<streamex.version>0.6.5</streamex.version>
<vavr.version>0.9.0</vavr.version>
<!-- maven plugins -->
<maven-compiler-plugin.version>3.6.0</maven-compiler-plugin.version>
<maven-surefire-plugin.version>2.19.1</maven-surefire-plugin.version>
</properties>
</project>
<!-- testing -->
<org.hamcrest.version>1.3</org.hamcrest.version>
<junit.version>4.12</junit.version>
<mockito.version>2.8.9</mockito.version>
<assertj.version>3.6.1</assertj.version>
<avaitility.version>1.7.0</avaitility.version>
<!-- maven plugins -->
<maven-compiler-plugin.version>3.6.0</maven-compiler-plugin.version>
<maven-surefire-plugin.version>2.19.1</maven-surefire-plugin.version>
</properties>
</project>

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@ -0,0 +1,51 @@
package com.baeldung.jdbcrowset;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.sql.Statement;
import javax.sql.rowset.JdbcRowSet;
import javax.sql.rowset.RowSetFactory;
import javax.sql.rowset.RowSetProvider;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.context.annotation.Configuration;
@Configuration
@EnableAutoConfiguration
public class DatabaseConfiguration {
public static Connection geth2Connection() throws Exception {
Class.forName("org.h2.Driver");
System.out.println("Driver Loaded.");
String url = "jdbc:h2:mem:testdb";
return DriverManager.getConnection(url, "sa", "");
}
public static void initDatabase(Statement stmt) throws SQLException{
int iter = 1;
while(iter<=5){
String customer = "Customer"+iter;
String sql ="INSERT INTO customers(id, name) VALUES ("+iter+ ",'"+customer+"');";
System.out.println("here is sql statmeent for execution: " + sql);
stmt.executeUpdate(sql);
iter++;
}
int iterb = 1;
while(iterb<=5){
String associate = "Associate"+iter;
String sql = "INSERT INTO associates(id, name) VALUES("+iterb+",'"+associate+"');";
System.out.println("here is sql statement for associate:"+ sql);
stmt.executeUpdate(sql);
iterb++;
}
}
}

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@ -0,0 +1,24 @@
package com.baeldung.jdbcrowset;
import javax.sql.RowSetEvent;
import javax.sql.RowSetListener;
public class ExampleListener implements RowSetListener {
public void cursorMoved(RowSetEvent event) {
System.out.println("ExampleListener alerted of cursorMoved event");
System.out.println(event.toString());
}
public void rowChanged(RowSetEvent event) {
System.out.println("ExampleListener alerted of rowChanged event");
System.out.println(event.toString());
}
public void rowSetChanged(RowSetEvent event) {
System.out.println("ExampleListener alerted of rowSetChanged event");
System.out.println(event.toString());
}
}

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@ -0,0 +1,46 @@
package com.baeldung.jdbcrowset;
import java.sql.SQLException;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import javax.sql.RowSet;
import javax.sql.rowset.Predicate;
public class FilterExample implements Predicate {
private Pattern pattern;
public FilterExample(String regexQuery) {
if (regexQuery != null && !regexQuery.isEmpty()) {
pattern = Pattern.compile(regexQuery);
}
}
public boolean evaluate(RowSet rs) {
try {
if (!rs.isAfterLast()) {
String name = rs.getString("name");
System.out.println(String.format(
"Searching for pattern '%s' in %s", pattern.toString(),
name));
Matcher matcher = pattern.matcher(name);
return matcher.matches();
} else
return false;
} catch (Exception e) {
e.printStackTrace();
return false;
}
}
public boolean evaluate(Object value, int column) throws SQLException {
throw new UnsupportedOperationException("This operation is unsupported.");
}
public boolean evaluate(Object value, String columnName)
throws SQLException {
throw new UnsupportedOperationException("This operation is unsupported.");
}
}

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@ -0,0 +1,139 @@
package com.baeldung.jdbcrowset;
import java.io.FileOutputStream;
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.ResultSetMetaData;
import java.sql.SQLException;
import java.sql.Statement;
import com.sun.rowset.*;
import javax.sql.rowset.CachedRowSet;
import javax.sql.rowset.FilteredRowSet;
import javax.sql.rowset.JdbcRowSet;
import javax.sql.rowset.JoinRowSet;
import javax.sql.rowset.RowSetFactory;
import javax.sql.rowset.RowSetProvider;
import javax.sql.rowset.WebRowSet;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
public class JdbcRowsetApplication {
public static void main(String[] args) throws Exception {
SpringApplication.run(JdbcRowsetApplication.class, args);
Statement stmt = null;
try {
Connection conn = DatabaseConfiguration.geth2Connection();
String drop = "DROP TABLE IF EXISTS customers, associates;";
String schema = "CREATE TABLE customers (id INT NOT NULL, name VARCHAR(50) NOT NULL, PRIMARY KEY (id)); ";
String schemapartb = "CREATE TABLE associates (id INT NOT NULL, name VARCHAR(50) NOT NULL, PRIMARY KEY (id));";
stmt = conn.createStatement();
stmt.executeUpdate(drop);
stmt.executeUpdate(schema);
stmt.executeUpdate(schemapartb);
// insert data
DatabaseConfiguration.initDatabase(stmt);
// JdbcRowSet Example
String sql = "SELECT * FROM customers";
JdbcRowSet jdbcRS;
jdbcRS = new JdbcRowSetImpl(conn);
jdbcRS.setType(ResultSet.TYPE_SCROLL_INSENSITIVE);
jdbcRS.setCommand(sql);
jdbcRS.execute();
jdbcRS.addRowSetListener(new ExampleListener());
while (jdbcRS.next()) {
// each call to next, generates a cursorMoved event
System.out.println("id=" + jdbcRS.getString(1));
System.out.println("name=" + jdbcRS.getString(2));
}
// CachedRowSet Example
String username = "sa";
String password = "";
String url = "jdbc:h2:mem:testdb";
CachedRowSet crs = new CachedRowSetImpl();
crs.setUsername(username);
crs.setPassword(password);
crs.setUrl(url);
crs.setCommand(sql);
crs.execute();
crs.addRowSetListener(new ExampleListener());
while (crs.next()) {
if (crs.getInt("id") == 1) {
System.out.println("CRS found customer1 and will remove the record.");
crs.deleteRow();
break;
}
}
// WebRowSet example
WebRowSet wrs = new WebRowSetImpl();
wrs.setUsername(username);
wrs.setPassword(password);
wrs.setUrl(url);
wrs.setCommand(sql);
wrs.execute();
FileOutputStream ostream = new FileOutputStream("customers.xml");
wrs.writeXml(ostream);
// JoinRowSet example
CachedRowSetImpl customers = new CachedRowSetImpl();
customers.setUsername(username);
customers.setPassword(password);
customers.setUrl(url);
customers.setCommand(sql);
customers.execute();
CachedRowSetImpl associates = new CachedRowSetImpl();
associates.setUsername(username);
associates.setPassword(password);
associates.setUrl(url);
String associatesSQL = "SELECT * FROM associates";
associates.setCommand(associatesSQL);
associates.execute();
JoinRowSet jrs = new JoinRowSetImpl();
final String ID = "id";
final String NAME = "name";
jrs.addRowSet(customers, ID);
jrs.addRowSet(associates, ID);
jrs.last();
System.out.println("Total rows: " + jrs.getRow());
jrs.beforeFirst();
while (jrs.next()) {
String string1 = jrs.getString(ID);
String string2 = jrs.getString(NAME);
System.out.println("ID: " + string1 + ", NAME: " + string2);
}
// FilteredRowSet example
RowSetFactory rsf = RowSetProvider.newFactory();
FilteredRowSet frs = rsf.createFilteredRowSet();
frs.setCommand("select * from customers");
frs.execute(conn);
frs.setFilter(new FilterExample("^[A-C].*"));
ResultSetMetaData rsmd = frs.getMetaData();
int columncount = rsmd.getColumnCount();
while (frs.next()) {
for (int i = 1; i <= columncount; i++) {
System.out.println(rsmd.getColumnLabel(i) + " = " + frs.getObject(i) + " ");
}
}
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}

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@ -0,0 +1,116 @@
package com.baeldung.array;
import org.junit.Test;
import java.util.*;
public class SearchArrayTest {
@Test
public void searchArrayAllocNewCollections() {
int count = 1000;
String[] strings = seedArray(count);
long startTime = System.nanoTime();
for (int i = 0; i < count; i++) {
searchList(strings, "W");
}
long duration = System.nanoTime() - startTime;
System.out.println("SearchList: " + duration / 10000);
startTime = System.nanoTime();
for (int i = 0; i < count; i++) {
searchSet(strings,"S");
}
duration = System.nanoTime() - startTime;
System.out.println("SearchSet: " + duration / 10000);
startTime = System.nanoTime();
for (int i = 0; i < count; i++) {
searchLoop(strings, "T");
}
duration = System.nanoTime() - startTime;
System.out.println("SearchLoop: " + duration / 10000);
}
@Test
public void searchArrayReuseCollections() {
int count = 10000;
String[] strings = seedArray(count);
List<String> asList = Arrays.asList(strings);
Set<String> asSet = new HashSet<>(Arrays.asList(strings));
long startTime = System.nanoTime();
for (int i = 0; i < count; i++) {
asList.contains("W");
}
long duration = System.nanoTime() - startTime;
System.out.println("List: " + duration / 10000);
startTime = System.nanoTime();
for (int i = 0; i < count; i++) {
asSet.contains("S");
}
duration = System.nanoTime() - startTime;
System.out.println("Set: " + duration / 10000);
startTime = System.nanoTime();
for (int i = 0; i < count; i++) {
searchLoop(strings, "T");
}
duration = System.nanoTime() - startTime;
System.out.println("Loop: " + duration / 10000);
}
@Test
public void searchArrayBinarySearch() {
int count = 10000;
String[] strings = seedArray(count);
Arrays.sort(strings);
long startTime = System.nanoTime();
for (int i = 0; i < count; i++) {
Arrays.binarySearch(strings, "A");
}
long duration = System.nanoTime() - startTime;
System.out.println("Binary search: " + duration / 10000);
}
private boolean searchList(String[] strings, String searchString) {
return Arrays.asList(strings).contains(searchString);
}
private boolean searchSet(String[] strings, String searchString) {
Set<String> set = new HashSet<>(Arrays.asList(strings));
return set.contains(searchString);
}
private boolean searchLoop(String[] strings, String searchString) {
for (String s : strings) {
if (s.equals(searchString))
return true;
}
return false;
}
private String[] seedArray(int length) {
String[] strings = new String[length];
Random random = new Random();
for (int i = 0; i < length; i++)
{
strings[i] = String.valueOf(random.nextInt());
}
return strings;
}
}

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@ -0,0 +1,93 @@
package com.baeldung.collection;
import java.util.ConcurrentModificationException;
import java.util.HashSet;
import java.util.Iterator;
import java.util.Set;
import org.junit.Assert;
import org.junit.Test;
public class WhenUsingHashSet {
@Test
public void whenAddingElement_shouldAddElement() {
Set<String> hashset = new HashSet<>();
Assert.assertTrue(hashset.add("String Added"));
}
@Test
public void whenCheckingForElement_shouldSearchForElement() {
Set<String> hashsetContains = new HashSet<>();
hashsetContains.add("String Added");
Assert.assertTrue(hashsetContains.contains("String Added"));
}
@Test
public void whenCheckingTheSizeOfHashSet_shouldReturnThesize() {
Set<String> hashSetSize = new HashSet<>();
hashSetSize.add("String Added");
Assert.assertEquals(1, hashSetSize.size());
}
@Test
public void whenCheckingForEmptyHashSet_shouldCheckForEmpty() {
Set<String> emptyHashSet = new HashSet<>();
Assert.assertTrue(emptyHashSet.isEmpty());
}
@Test
public void whenRemovingElement_shouldRemoveElement() {
Set<String> removeFromHashSet = new HashSet<>();
removeFromHashSet.add("String Added");
Assert.assertTrue(removeFromHashSet.remove("String Added"));
}
@Test
public void whenClearingHashSet_shouldClearHashSet() {
Set<String> clearHashSet = new HashSet<>();
clearHashSet.add("String Added");
clearHashSet.clear();
Assert.assertTrue(clearHashSet.isEmpty());
}
@Test
public void whenIteratingHashSet_shouldIterateHashSet() {
Set<String> hashset = new HashSet<>();
hashset.add("First");
hashset.add("Second");
hashset.add("Third");
Iterator<String> itr = hashset.iterator();
while (itr.hasNext()) {
System.out.println(itr.next());
}
}
@Test(expected = ConcurrentModificationException.class)
public void whenModifyingHashSetWhileIterating_shouldThrowException() {
Set<String> hashset = new HashSet<>();
hashset.add("First");
hashset.add("Second");
hashset.add("Third");
Iterator<String> itr = hashset.iterator();
while (itr.hasNext()) {
itr.next();
hashset.remove("Second");
}
}
@Test
public void whenRemovingElementUsingIterator_shouldRemoveElement() {
Set<String> hashset = new HashSet<>();
hashset.add("First");
hashset.add("Second");
hashset.add("Third");
Iterator<String> itr = hashset.iterator();
while (itr.hasNext()) {
String element = itr.next();
if (element.equals("Second"))
itr.remove();
}
Assert.assertEquals(2, hashset.size());
}
}

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@ -0,0 +1,157 @@
package com.baeldung.jdbcrowset;
import java.io.FileOutputStream;
import java.io.IOException;
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.ResultSetMetaData;
import java.sql.SQLException;
import java.sql.Statement;
import javax.sql.rowset.CachedRowSet;
import javax.sql.rowset.FilteredRowSet;
import javax.sql.rowset.JdbcRowSet;
import javax.sql.rowset.JoinRowSet;
import javax.sql.rowset.RowSetFactory;
import javax.sql.rowset.RowSetProvider;
import javax.sql.rowset.WebRowSet;
import org.junit.Before;
import org.junit.Test;
import com.sun.rowset.CachedRowSetImpl;
import com.sun.rowset.JdbcRowSetImpl;
import com.sun.rowset.JoinRowSetImpl;
import com.sun.rowset.WebRowSetImpl;
public class JdbcRowSetTest {
Statement stmt = null;
String username = "sa";
String password = "";
String url = "jdbc:h2:mem:testdb";
String sql = "SELECT * FROM customers";
@Before
public void setup() throws Exception {
Connection conn = DatabaseConfiguration.geth2Connection();
String drop = "DROP TABLE IF EXISTS customers, associates;";
String schema = "CREATE TABLE customers (id INT NOT NULL, name VARCHAR(50) NOT NULL, PRIMARY KEY (id)); ";
String schemapartb = "CREATE TABLE associates (id INT NOT NULL, name VARCHAR(50) NOT NULL, PRIMARY KEY (id));";
stmt = conn.createStatement();
stmt.executeUpdate(drop);
stmt.executeUpdate(schema);
stmt.executeUpdate(schemapartb);
DatabaseConfiguration.initDatabase(stmt);
}
// JdbcRowSet Example
@Test
public void createJdbcRowSet_SelectCustomers_ThenCorrect() throws Exception {
String sql = "SELECT * FROM customers";
JdbcRowSet jdbcRS;
Connection conn = DatabaseConfiguration.geth2Connection();
jdbcRS = new JdbcRowSetImpl(conn);
jdbcRS.setType(ResultSet.TYPE_SCROLL_INSENSITIVE);
jdbcRS.setCommand(sql);
jdbcRS.execute();
jdbcRS.addRowSetListener(new ExampleListener());
while (jdbcRS.next()) {
// each call to next, generates a cursorMoved event
System.out.println("id=" + jdbcRS.getString(1));
System.out.println("name=" + jdbcRS.getString(2));
}
}
// CachedRowSet Example
@Test
public void createCachedRowSet_DeleteRecord_ThenCorrect() throws Exception {
CachedRowSet crs = new CachedRowSetImpl();
crs.setUsername(username);
crs.setPassword(password);
crs.setUrl(url);
crs.setCommand(sql);
crs.execute();
crs.addRowSetListener(new ExampleListener());
while (crs.next()) {
if (crs.getInt("id") == 1) {
System.out.println("CRS found customer1 and will remove the record.");
crs.deleteRow();
break;
}
}
}
// WebRowSet example
@Test
public void createWebRowSet_SelectCustomers_WritetoXML_ThenCorrect() throws SQLException, IOException {
WebRowSet wrs = new WebRowSetImpl();
wrs.setUsername(username);
wrs.setPassword(password);
wrs.setUrl(url);
wrs.setCommand(sql);
wrs.execute();
FileOutputStream ostream = new FileOutputStream("customers.xml");
wrs.writeXml(ostream);
}
// JoinRowSet example
@Test
public void createCachedRowSets_DoJoinRowSet_ThenCorrect() throws Exception {
CachedRowSetImpl customers = new CachedRowSetImpl();
customers.setUsername(username);
customers.setPassword(password);
customers.setUrl(url);
customers.setCommand(sql);
customers.execute();
CachedRowSetImpl associates = new CachedRowSetImpl();
associates.setUsername(username);
associates.setPassword(password);
associates.setUrl(url);
String associatesSQL = "SELECT * FROM associates";
associates.setCommand(associatesSQL);
associates.execute();
JoinRowSet jrs = new JoinRowSetImpl();
final String ID = "id";
final String NAME = "name";
jrs.addRowSet(customers, ID);
jrs.addRowSet(associates, ID);
jrs.last();
System.out.println("Total rows: " + jrs.getRow());
jrs.beforeFirst();
while (jrs.next()) {
String string1 = jrs.getString(ID);
String string2 = jrs.getString(NAME);
System.out.println("ID: " + string1 + ", NAME: " + string2);
}
}
// FilteredRowSet example
@Test
public void createFilteredRowSet_filterByRegexExpression_thenCorrect() throws Exception {
RowSetFactory rsf = RowSetProvider.newFactory();
FilteredRowSet frs = rsf.createFilteredRowSet();
frs.setCommand("select * from customers");
Connection conn = DatabaseConfiguration.geth2Connection();
frs.execute(conn);
frs.setFilter(new FilterExample("^[A-C].*"));
ResultSetMetaData rsmd = frs.getMetaData();
int columncount = rsmd.getColumnCount();
while (frs.next()) {
for (int i = 1; i <= columncount; i++) {
System.out.println(rsmd.getColumnLabel(i) + " = " + frs.getObject(i) + " ");
}
}
}
}

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@ -1,11 +1,38 @@
package com.baeldung.loops;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Set;
import org.junit.Assert;
import org.junit.BeforeClass;
import org.junit.Test;
public class WhenUsingLoops {
private LoopsInJava loops = new LoopsInJava();
private static List<String> list = new ArrayList<>();
private static Set<String> set = new HashSet<>();
private static Map<String, Integer> map = new HashMap<>();
@BeforeClass
public static void setUp() {
list.add("One");
list.add("Two");
list.add("Three");
set.add("Four");
set.add("Five");
set.add("Six");
map.put("One", 1);
map.put("Two", 2);
map.put("Three", 3);
}
@Test
public void shouldRunForLoop() {
@ -34,4 +61,47 @@ public class WhenUsingLoops {
int[] actual = loops.do_while_loop();
Assert.assertArrayEquals(expected, actual);
}
@Test
public void whenUsingSimpleFor_shouldIterateList() {
for (int i = 0; i < list.size(); i++) {
System.out.println(list.get(i));
}
}
@Test
public void whenUsingEnhancedFor_shouldIterateList() {
for (String item : list) {
System.out.println(item);
}
}
@Test
public void whenUsingEnhancedFor_shouldIterateSet() {
for (String item : set) {
System.out.println(item);
}
}
@Test
public void whenUsingEnhancedFor_shouldIterateMap() {
for (Entry<String, Integer> entry : map.entrySet()) {
System.out.println("Key: " + entry.getKey() + " - " + "Value: " + entry.getValue());
}
}
@Test
public void whenUsingSimpleFor_shouldRunLabelledLoop() {
aa: for (int i = 1; i <= 3; i++) {
if (i == 1)
continue;
bb: for (int j = 1; j <= 3; j++) {
if (i == 2 && j == 2) {
break aa;
}
System.out.println(i + " " + j);
}
}
}
}

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@ -0,0 +1,51 @@
package com.baeldung.kotlin
import org.junit.Assert
import org.junit.Test
class ExtensionMethods {
@Test
fun simpleExtensionMethod() {
fun String.escapeForXml() : String {
return this
.replace("&", "&amp;")
.replace("<", "&lt;")
.replace(">", "&gt;")
}
Assert.assertEquals("Nothing", "Nothing".escapeForXml())
Assert.assertEquals("&lt;Tag&gt;", "<Tag>".escapeForXml())
Assert.assertEquals("a&amp;b", "a&b".escapeForXml())
}
@Test
fun genericExtensionMethod() {
fun <T> T.concatAsString(b: T) : String {
return this.toString() + b.toString()
}
Assert.assertEquals("12", "1".concatAsString("2"))
Assert.assertEquals("12", 1.concatAsString(2))
// This doesn't compile
// Assert.assertEquals("12", 1.concatAsString(2.0))
}
@Test
fun infixExtensionMethod() {
infix fun Number.toPowerOf(exponent: Number): Double {
return Math.pow(this.toDouble(), exponent.toDouble())
}
Assert.assertEquals(9.0, 3 toPowerOf 2, 0.1)
Assert.assertEquals(3.0, 9 toPowerOf 0.5, 0.1)
}
@Test
fun operatorExtensionMethod() {
operator fun List<Int>.times(by: Int): List<Int> {
return this.map { it * by }
}
Assert.assertEquals(listOf(2, 4, 6), listOf(1, 2, 3) * 2)
}
}

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@ -14,7 +14,9 @@ import org.junit.Test;
import javax.persistence.Query;
import java.io.IOException;
import static org.assertj.core.api.Assertions.assertThat;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;
public class HibernateSpatialTest {
@ -76,10 +78,8 @@ public class HibernateSpatialTest {
Query query = session.createQuery("select p from PointEntity p where within(p.point, :area) = true",
PointEntity.class);
query.setParameter("area", wktToGeometry("POLYGON((0 0, 0 5, 5 5, 5 0, 0 0))"));
assertEquals(3, query.getResultList().size());
assertEquals("POINT (1 1)", ((PointEntity) query.getResultList().get(0)).getPoint().toString());
assertEquals("POINT (1 2)", ((PointEntity) query.getResultList().get(1)).getPoint().toString());
assertEquals("POINT (3 4)", ((PointEntity) query.getResultList().get(2)).getPoint().toString());
assertThat(query.getResultList().stream().map(p -> ((PointEntity) p).getPoint().toString()))
.containsOnly("POINT (1 1)", "POINT (1 2)", "POINT (3 4)");
}
private void insertPoint(String point) throws ParseException {

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@ -0,0 +1,35 @@
<?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>
<name>logback</name>
<artifactId>logback</artifactId>
<version>0.1-SNAPSHOT</version>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<logback.version>1.2.3</logback.version>
</properties>
<parent>
<groupId>com.baeldung</groupId>
<artifactId>parent-modules</artifactId>
<version>1.0.0-SNAPSHOT</version>
<relativePath>../../</relativePath>
</parent>
<dependencies>
<dependency>
<groupId>ch.qos.logback</groupId>
<artifactId>logback-classic</artifactId>
<version>${logback.version}</version>
</dependency>
</dependencies>
</project>

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@ -0,0 +1,14 @@
package com.baeldung.logback;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class Example {
private static final Logger logger = LoggerFactory.getLogger(Example.class);
public static void main(String[] args) {
logger.info("Example log from {}", Example.class.getSimpleName());
}
}

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@ -0,0 +1,37 @@
package com.baeldung.logback;
import ch.qos.logback.classic.spi.ILoggingEvent;
import ch.qos.logback.core.AppenderBase;
import java.util.HashMap;
import java.util.Map;
public class MapAppender extends AppenderBase<ILoggingEvent> {
private final Map<String, ILoggingEvent> eventMap = new HashMap<>();
private String prefix;
@Override
protected void append(final ILoggingEvent event) {
if (prefix == null || "".equals(prefix)) {
addError("Prefix is not set for MapAppender.");
return;
}
eventMap.put(prefix + System.currentTimeMillis(), event);
}
public String getPrefix() {
return prefix;
}
public void setPrefix(final String prefix) {
this.prefix = prefix;
}
public Map<String, ILoggingEvent> getEventMap() {
return eventMap;
}
}

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@ -0,0 +1,18 @@
<configuration>
<appender name="map" class="com.baeldung.logback.MapAppender">
<prefix>test</prefix>
</appender>
<appender name="out" class="ch.qos.logback.core.ConsoleAppender">
<encoder>
<pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n</pattern>
</encoder>
</appender>
<root level="info">
<appender-ref ref="map"/>
<appender-ref ref="out"/>
</root>
</configuration>

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@ -0,0 +1,33 @@
package com.baeldung.logback;
import ch.qos.logback.classic.Logger;
import org.junit.Before;
import org.junit.Test;
import org.slf4j.LoggerFactory;
import static org.junit.Assert.assertEquals;
public class MapAppenderIntegrationTest {
private Logger rootLogger;
@Before
public void setUp() throws Exception {
rootLogger = (Logger) LoggerFactory.getLogger("ROOT");
}
@Test
public void whenLoggerEmitsLoggingEvent_thenAppenderReceivesEvent() throws Exception {
rootLogger.info("Test from {}", this.getClass().getSimpleName());
MapAppender appender = (MapAppender) rootLogger.getAppender("map");
assertEquals(appender.getEventMap().size(), 1);
}
@Test
public void givenNoPrefixSet_whenLoggerEmitsEvent_thenAppenderReceivesNoEvent() throws Exception {
rootLogger.info("Test from {}", this.getClass().getSimpleName());
MapAppender appender = (MapAppender) rootLogger.getAppender("badMap");
assertEquals(appender.getEventMap().size(), 0);
}
}

View File

@ -0,0 +1,60 @@
package com.baeldung.logback;
import ch.qos.logback.classic.Level;
import ch.qos.logback.classic.LoggerContext;
import ch.qos.logback.classic.spi.LoggingEvent;
import ch.qos.logback.core.BasicStatusManager;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;
public class MapAppenderTest {
private LoggerContext ctx;
private MapAppender mapAppender = new MapAppender();
private LoggingEvent event;
@Before
public void setUp() throws Exception {
ctx = new LoggerContext();
ctx.setName("test context");
ctx.setStatusManager(new BasicStatusManager());
mapAppender.setContext(ctx);
mapAppender.setPrefix("prefix");
event = new LoggingEvent("fqcn", ctx.getLogger("logger"), Level.INFO, "Test message for logback appender", null, new Object[0]);
ctx.start();
}
@After
public void tearDown() throws Exception {
ctx.stop();
mapAppender.stop();
}
@Test
public void whenPrefixIsNull_thenMapAppenderDoesNotLog() throws Exception {
mapAppender.setPrefix(null);
mapAppender.append(event);
assertTrue(mapAppender.getEventMap().isEmpty());
}
@Test
public void whenPrefixIsEmpty_thenMapAppenderDoesNotLog() throws Exception {
mapAppender.setPrefix("");
mapAppender.append(event);
assertTrue(mapAppender.getEventMap().isEmpty());
}
@Test
public void whenLogMessageIsEmitted_thenMapAppenderReceivesMessage() throws Exception {
mapAppender.append(event);
assertEquals(mapAppender.getEventMap().size(), 1);
mapAppender.getEventMap().forEach((k, v) -> assertTrue(k.startsWith("prefix")));
}
}

View File

@ -0,0 +1,14 @@
<configuration debug="true">
<appender name="map" class="com.baeldung.logback.MapAppender">
<prefix>test</prefix>
</appender>
<appender name="badMap" class="com.baeldung.logback.MapAppender"/>
<root level="debug">
<appender-ref ref="map"/>
<appender-ref ref="badMap"/>
</root>
</configuration>

View File

@ -57,6 +57,11 @@
<artifactId>jta</artifactId>
<version>${jta.version}</version>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-search-orm</artifactId>
<version>${hibernatesearch.version}</version>
</dependency>
<dependency>
<groupId>org.apache.tomcat</groupId>
@ -184,6 +189,7 @@
<!-- persistence -->
<hibernate.version>5.2.10.Final</hibernate.version>
<hibernatesearch.version>5.8.2.Final</hibernatesearch.version>
<mysql-connector-java.version>8.0.7-dmr</mysql-connector-java.version>
<tomcat-dbcp.version>9.0.0.M26</tomcat-dbcp.version>
<jta.version>1.1</jta.version>

View File

@ -0,0 +1,76 @@
package com.baeldung.hibernatesearch;
import com.google.common.base.Preconditions;
import org.apache.tomcat.dbcp.dbcp2.BasicDataSource;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.PropertySource;
import org.springframework.core.env.Environment;
import org.springframework.dao.annotation.PersistenceExceptionTranslationPostProcessor;
import org.springframework.data.jpa.repository.config.EnableJpaRepositories;
import org.springframework.jdbc.datasource.DriverManagerDataSource;
import org.springframework.orm.jpa.JpaTransactionManager;
import org.springframework.orm.jpa.JpaVendorAdapter;
import org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean;
import org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter;
import org.springframework.transaction.PlatformTransactionManager;
import org.springframework.transaction.annotation.EnableTransactionManagement;
import javax.persistence.EntityManagerFactory;
import javax.sql.DataSource;
import java.util.Properties;
@EnableTransactionManagement
@Configuration
@PropertySource({ "classpath:persistence-h2.properties" })
@EnableJpaRepositories(basePackages = { "com.baeldung.hibernatesearch" })
@ComponentScan({ "com.baeldung.hibernatesearch" })
public class HibernateSearchConfig {
@Autowired
private Environment env;
@Bean
public LocalContainerEntityManagerFactoryBean entityManagerFactory() {
LocalContainerEntityManagerFactoryBean em = new LocalContainerEntityManagerFactoryBean();
em.setDataSource(dataSource());
em.setPackagesToScan(new String[] { "com.baeldung.hibernatesearch.model" });
JpaVendorAdapter vendorAdapter = new HibernateJpaVendorAdapter();
em.setJpaVendorAdapter(vendorAdapter);
em.setJpaProperties(additionalProperties());
return em;
}
@Bean
public DataSource dataSource() {
final BasicDataSource dataSource = new BasicDataSource();
dataSource.setDriverClassName(Preconditions.checkNotNull(env.getProperty("jdbc.driverClassName")));
dataSource.setUrl(Preconditions.checkNotNull(env.getProperty("jdbc.url")));
return dataSource;
}
@Bean
public PlatformTransactionManager transactionManager(EntityManagerFactory emf) {
JpaTransactionManager transactionManager = new JpaTransactionManager();
transactionManager.setEntityManagerFactory(emf);
return transactionManager;
}
@Bean
public PersistenceExceptionTranslationPostProcessor exceptionTranslation() {
return new PersistenceExceptionTranslationPostProcessor();
}
Properties additionalProperties() {
Properties properties = new Properties();
properties.setProperty("hibernate.hbm2ddl.auto", Preconditions.checkNotNull(env.getProperty("hibernate.hbm2ddl.auto")));
properties.setProperty("hibernate.dialect", Preconditions.checkNotNull(env.getProperty("hibernate.dialect")));
return properties;
}
}

View File

@ -0,0 +1,195 @@
package com.baeldung.hibernatesearch;
import com.baeldung.hibernatesearch.model.Product;
import org.apache.lucene.search.Query;
import org.hibernate.search.engine.ProjectionConstants;
import org.hibernate.search.jpa.FullTextEntityManager;
import org.hibernate.search.jpa.FullTextQuery;
import org.hibernate.search.jpa.Search;
import org.hibernate.search.query.dsl.QueryBuilder;
import org.springframework.stereotype.Repository;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
import java.util.List;
@Repository
public class ProductSearchDao {
@PersistenceContext
private EntityManager entityManager;
public List<Product> searchProductNameByKeywordQuery(String text) {
Query keywordQuery = getQueryBuilder()
.keyword()
.onField("productName")
.matching(text)
.createQuery();
List<Product> results = getJpaQuery(keywordQuery).getResultList();
return results;
}
public List<Product> searchProductNameByFuzzyQuery(String text) {
Query fuzzyQuery = getQueryBuilder()
.keyword()
.fuzzy()
.withEditDistanceUpTo(2)
.withPrefixLength(0)
.onField("productName")
.matching(text)
.createQuery();
List<Product> results = getJpaQuery(fuzzyQuery).getResultList();
return results;
}
public List<Product> searchProductNameByWildcardQuery(String text) {
Query wildcardQuery = getQueryBuilder()
.keyword()
.wildcard()
.onField("productName")
.matching(text)
.createQuery();
List<Product> results = getJpaQuery(wildcardQuery).getResultList();
return results;
}
public List<Product> searchProductDescriptionByPhraseQuery(String text) {
Query phraseQuery = getQueryBuilder()
.phrase()
.withSlop(1)
.onField("description")
.sentence(text)
.createQuery();
List<Product> results = getJpaQuery(phraseQuery).getResultList();
return results;
}
public List<Product> searchProductNameAndDescriptionBySimpleQueryStringQuery(String text) {
Query simpleQueryStringQuery = getQueryBuilder()
.simpleQueryString()
.onFields("productName", "description")
.matching(text)
.createQuery();
List<Product> results = getJpaQuery(simpleQueryStringQuery).getResultList();
return results;
}
public List<Product> searchProductNameByRangeQuery(int low, int high) {
Query rangeQuery = getQueryBuilder()
.range()
.onField("memory")
.from(low)
.to(high)
.createQuery();
List<Product> results = getJpaQuery(rangeQuery).getResultList();
return results;
}
public List<Object[]> searchProductNameByMoreLikeThisQuery(Product entity) {
Query moreLikeThisQuery = getQueryBuilder()
.moreLikeThis()
.comparingField("productName")
.toEntity(entity)
.createQuery();
List<Object[]> results = getJpaQuery(moreLikeThisQuery).setProjection(ProjectionConstants.THIS, ProjectionConstants.SCORE)
.getResultList();
return results;
}
public List<Product> searchProductNameAndDescriptionByKeywordQuery(String text) {
Query keywordQuery = getQueryBuilder()
.keyword()
.onFields("productName", "description")
.matching(text)
.createQuery();
List<Product> results = getJpaQuery(keywordQuery).getResultList();
return results;
}
public List<Object[]> searchProductNameAndDescriptionByMoreLikeThisQuery(Product entity) {
Query moreLikeThisQuery = getQueryBuilder()
.moreLikeThis()
.comparingField("productName")
.toEntity(entity)
.createQuery();
List<Object[]> results = getJpaQuery(moreLikeThisQuery).setProjection(ProjectionConstants.THIS, ProjectionConstants.SCORE)
.getResultList();
return results;
}
public List<Product> searchProductNameAndDescriptionByCombinedQuery(String manufactorer, int memoryLow, int memoryTop, String extraFeature, String exclude) {
Query combinedQuery = getQueryBuilder()
.bool()
.must(getQueryBuilder().keyword()
.onField("productName")
.matching(manufactorer)
.createQuery())
.must(getQueryBuilder()
.range()
.onField("memory")
.from(memoryLow)
.to(memoryTop)
.createQuery())
.should(getQueryBuilder()
.phrase()
.onField("description")
.sentence(extraFeature)
.createQuery())
.must(getQueryBuilder()
.keyword()
.onField("productName")
.matching(exclude)
.createQuery())
.not()
.createQuery();
List<Product> results = getJpaQuery(combinedQuery).getResultList();
return results;
}
private FullTextQuery getJpaQuery(org.apache.lucene.search.Query luceneQuery) {
FullTextEntityManager fullTextEntityManager = Search.getFullTextEntityManager(entityManager);
return fullTextEntityManager.createFullTextQuery(luceneQuery, Product.class);
}
private QueryBuilder getQueryBuilder() {
FullTextEntityManager fullTextEntityManager = Search.getFullTextEntityManager(entityManager);
return fullTextEntityManager.getSearchFactory()
.buildQueryBuilder()
.forEntity(Product.class)
.get();
}
}

View File

@ -0,0 +1,94 @@
package com.baeldung.hibernatesearch.model;
import org.hibernate.search.annotations.*;
import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.Table;
@Entity
@Indexed
@Table(name = "product")
public class Product {
@Id
private int id;
@Field(termVector = TermVector.YES)
private String productName;
@Field(termVector = TermVector.YES)
private String description;
@Field
private int memory;
public Product(int id, String productName, int memory, String description) {
this.id = id;
this.productName = productName;
this.memory = memory;
this.description = description;
}
public Product() {
}
@Override
public boolean equals(Object o) {
if (this == o)
return true;
if (!(o instanceof Product))
return false;
Product product = (Product) o;
if (id != product.id)
return false;
if (memory != product.memory)
return false;
if (!productName.equals(product.productName))
return false;
return description.equals(product.description);
}
@Override
public int hashCode() {
int result = id;
result = 31 * result + productName.hashCode();
result = 31 * result + memory;
result = 31 * result + description.hashCode();
return result;
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getProductName() {
return productName;
}
public void setProductName(String productName) {
this.productName = productName;
}
public int getMemory() {
return memory;
}
public void setMemory(int memory) {
this.memory = memory;
}
public String getDescription() {
return description;
}
public void setDescription(String description) {
this.description = description;
}
}

View File

@ -21,7 +21,7 @@ import java.util.Properties;
@Configuration
@EnableTransactionManagement
@PropertySource({ "classpath:persistence-h2.properties" })
@PropertySource({ "classpath:persistence-mysql.properties" })
@ComponentScan({ "com.baeldung.persistence" })
public class PersistenceConfig {

View File

@ -4,24 +4,12 @@
"http://hibernate.org/dtd/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
<session-factory>
<property name="hibernate.connection.driver_class">
com.mysql.jdbc.Driver
</property>
<property name="hibernate.connection.password">
buddhinisam123
</property>
<property name="hibernate.connection.url">
jdbc:mysql://localhost:3306/spring_hibernate_many_to_many
</property>
<property name="hibernate.connection.username">
root
</property>
<property name="hibernate.dialect">
org.hibernate.dialect.MySQLDialect
</property>
<property name="hibernate.current_session_context_class">
thread
</property>
<property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>
<property name="hibernate.connection.password">tutorialmy5ql</property>
<property name="hibernate.connection.url">jdbc:mysql://localhost:3306/spring_hibernate_many_to_many</property>
<property name="hibernate.connection.username">tutorialuser</property>
<property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property>
<property name="hibernate.current_session_context_class">thread</property>
<property name="hibernate.show_sql">true</property>
</session-factory>
</hibernate-configuration>

View File

@ -9,5 +9,9 @@ hibernate.dialect=org.hibernate.dialect.H2Dialect
hibernate.show_sql=false
hibernate.hbm2ddl.auto=create-drop
# hibernate.search.X
hibernate.search.default.directory_provider = filesystem
hibernate.search.default.indexBase = /data/index/default
# envers.X
envers.audit_table_suffix=_audit_log

View File

@ -4,7 +4,6 @@ import com.baeldung.hibernate.immutable.entities.Event;
import com.baeldung.hibernate.immutable.entities.EventGeneratedId;
import com.baeldung.hibernate.immutable.util.HibernateUtil;
import com.google.common.collect.Sets;
import org.hibernate.CacheMode;
import org.hibernate.Session;
import org.junit.*;
import org.junit.rules.ExpectedException;
@ -14,6 +13,9 @@ import javax.persistence.PersistenceException;
import static org.hamcrest.MatcherAssert.assertThat;
import static org.hamcrest.core.IsEqual.equalTo;
/**
* Configured in: immutable.cfg.xml
*/
public class HibernateImmutableIntegrationTest {
private static Session session;
@ -98,6 +100,7 @@ public class HibernateImmutableIntegrationTest {
public void updateEventGenerated() {
createEventGenerated();
EventGeneratedId eventGeneratedId = (EventGeneratedId) session.createQuery("FROM EventGeneratedId WHERE name LIKE '%John%'").list().get(0);
eventGeneratedId.setName("Mike");
session.update(eventGeneratedId);
session.flush();
@ -115,7 +118,6 @@ public class HibernateImmutableIntegrationTest {
private static void createEventGenerated() {
EventGeneratedId eventGeneratedId = new EventGeneratedId("John", "Doe");
eventGeneratedId.setId(4L);
session.save(eventGeneratedId);
}

View File

@ -17,6 +17,9 @@ import com.baeldung.hibernate.manytomany.util.HibernateUtil;
import com.baeldung.hibernate.manytomany.model.Employee;
import com.baeldung.hibernate.manytomany.model.Project;
/**
* Configured in: manytomany.cfg.xml
*/
public class HibernateManyToManyAnnotationMainIntegrationTest {
private static SessionFactory sessionFactory;

View File

@ -0,0 +1,187 @@
package com.baeldung.hibernatesearch;
import com.baeldung.hibernatesearch.model.Product;
import static org.hamcrest.collection.IsIterableContainingInOrder.contains;
import static org.junit.Assert.*;
import org.hibernate.search.jpa.FullTextEntityManager;
import org.hibernate.search.jpa.Search;
import org.junit.Before;
import org.junit.FixMethodOrder;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.MethodSorters;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.test.annotation.Commit;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
import org.springframework.test.context.support.AnnotationConfigContextLoader;
import org.springframework.transaction.annotation.Transactional;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
import java.util.Arrays;
import java.util.LinkedList;
import java.util.List;
import static org.hamcrest.collection.IsIterableContainingInAnyOrder.containsInAnyOrder;
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(classes = { HibernateSearchConfig.class }, loader = AnnotationConfigContextLoader.class)
@Transactional
@FixMethodOrder(MethodSorters.NAME_ASCENDING)
public class HibernateSearchIntegrationTest {
@Autowired
ProductSearchDao dao;
@PersistenceContext
private EntityManager entityManager;
private List<Product> products;
@Before
public void setupTestData() {
products = Arrays.asList(new Product(1, "Apple iPhone X 256 GB", 256, "The current high-end smartphone from Apple, with lots of memory and also Face ID"),
new Product(2, "Apple iPhone X 128 GB", 128, "The current high-end smartphone from Apple, with Face ID"), new Product(3, "Apple iPhone 8 128 GB", 128, "The latest smartphone from Apple within the regular iPhone line, supporting wireless charging"),
new Product(4, "Samsung Galaxy S7 128 GB", 64, "A great Android smartphone"), new Product(5, "Microsoft Lumia 650 32 GB", 32, "A cheaper smartphone, coming with Windows Mobile"),
new Product(6, "Microsoft Lumia 640 32 GB", 32, "A cheaper smartphone, coming with Windows Mobile"), new Product(7, "Microsoft Lumia 630 16 GB", 16, "A cheaper smartphone, coming with Windows Mobile"));
}
@Commit
@Test
public void testA_whenInitialTestDataInserted_thenSuccess() {
for (int i = 0; i < products.size() - 1; i++) {
entityManager.persist(products.get(i));
}
}
@Test
public void testB_whenIndexInitialized_thenCorrectIndexSize() throws InterruptedException {
FullTextEntityManager fullTextEntityManager = Search.getFullTextEntityManager(entityManager);
fullTextEntityManager.createIndexer()
.startAndWait();
int indexSize = fullTextEntityManager.getSearchFactory()
.getStatistics()
.getNumberOfIndexedEntities(Product.class.getName());
assertEquals(products.size() - 1, indexSize);
}
@Commit
@Test
public void testC_whenAdditionalTestDataInserted_thenSuccess() {
entityManager.persist(products.get(products.size() - 1));
}
@Test
public void testD_whenAdditionalTestDataInserted_thenIndexUpdatedAutomatically() {
FullTextEntityManager fullTextEntityManager = Search.getFullTextEntityManager(entityManager);
int indexSize = fullTextEntityManager.getSearchFactory()
.getStatistics()
.getNumberOfIndexedEntities(Product.class.getName());
assertEquals(products.size(), indexSize);
}
@Test
public void testE_whenKeywordSearchOnName_thenCorrectMatches() {
List<Product> expected = Arrays.asList(products.get(0), products.get(1), products.get(2));
List<Product> results = dao.searchProductNameByKeywordQuery("iphone");
assertThat(results, containsInAnyOrder(expected.toArray()));
}
@Test
public void testF_whenFuzzySearch_thenCorrectMatches() {
List<Product> expected = Arrays.asList(products.get(0), products.get(1), products.get(2));
List<Product> results = dao.searchProductNameByFuzzyQuery("iPhaen");
assertThat(results, containsInAnyOrder(expected.toArray()));
}
@Test
public void testG_whenWildcardSearch_thenCorrectMatches() {
List<Product> expected = Arrays.asList(products.get(4), products.get(5), products.get(6));
List<Product> results = dao.searchProductNameByWildcardQuery("6*");
assertThat(results, containsInAnyOrder(expected.toArray()));
}
@Test
public void testH_whenPhraseSearch_thenCorrectMatches() {
List<Product> expected = Arrays.asList(products.get(2));
List<Product> results = dao.searchProductDescriptionByPhraseQuery("with wireless charging");
assertThat(results, containsInAnyOrder(expected.toArray()));
}
@Test
public void testI_whenSimpleQueryStringSearch_thenCorrectMatches() {
List<Product> expected = Arrays.asList(products.get(0), products.get(1));
List<Product> results = dao.searchProductNameAndDescriptionBySimpleQueryStringQuery("Aple~2 + \"iPhone X\" + (256 | 128)");
assertThat(results, containsInAnyOrder(expected.toArray()));
}
@Test
public void testJ_whenRangeSearch_thenCorrectMatches() {
List<Product> expected = Arrays.asList(products.get(0), products.get(1), products.get(2), products.get(3));
List<Product> results = dao.searchProductNameByRangeQuery(64, 256);
assertThat(results, containsInAnyOrder(expected.toArray()));
}
@Test
public void testK_whenMoreLikeThisSearch_thenCorrectMatchesInOrder() {
List<Product> expected = products;
List<Object[]> resultsWithScore = dao.searchProductNameByMoreLikeThisQuery(products.get(0));
List<Product> results = new LinkedList<Product>();
for (Object[] resultWithScore : resultsWithScore) {
results.add((Product) resultWithScore[0]);
}
assertThat(results, contains(expected.toArray()));
}
@Test
public void testL_whenKeywordSearchOnNameAndDescription_thenCorrectMatches() {
List<Product> expected = Arrays.asList(products.get(0), products.get(1), products.get(2));
List<Product> results = dao.searchProductNameAndDescriptionByKeywordQuery("iphone");
assertThat(results, containsInAnyOrder(expected.toArray()));
}
@Test
public void testM_whenMoreLikeThisSearchOnProductNameAndDescription_thenCorrectMatchesInOrder() {
List<Product> expected = products;
List<Object[]> resultsWithScore = dao.searchProductNameAndDescriptionByMoreLikeThisQuery(products.get(0));
List<Product> results = new LinkedList<Product>();
for (Object[] resultWithScore : resultsWithScore) {
results.add((Product) resultWithScore[0]);
}
assertThat(results, contains(expected.toArray()));
}
@Test
public void testN_whenCombinedSearch_thenCorrectMatches() {
List<Product> expected = Arrays.asList(products.get(1), products.get(2));
List<Product> results = dao.searchProductNameAndDescriptionByCombinedQuery("apple", 64, 128, "face id", "samsung");
assertThat(results, containsInAnyOrder(expected.toArray()));
}
}

View File

@ -107,6 +107,7 @@
<module>logging-modules/log-mdc</module>
<module>logging-modules/log4j</module>
<module>logging-modules/log4j2</module>
<module>logging-modules/logback</module>
<module>lombok</module>
<!-- <module>kotlin</module>-->
<module>mapstruct</module>

View File

@ -10,4 +10,4 @@ The "REST With Spring" Classes: http://bit.ly/restwithspring
- [Exploring the Spring 5 MVC URL Matching Improvements](http://www.baeldung.com/spring-5-mvc-url-matching)
- [Spring 5 WebClient](http://www.baeldung.com/spring-5-webclient)
- [Spring 5 Functional Bean Registration](http://www.baeldung.com/spring-5-functional-beans)
- [The SpringJUnitConfig and SpringJUnitWebConfig Annotations in Spring 5](http://www.baeldung.com/spring-5-junit-config)

View File

@ -0,0 +1,104 @@
package org.baeldung.bddmockito;
import static org.junit.Assert.fail;
import static org.mockito.BDDMockito.*;
import org.junit.Assert;
import org.junit.Before;
import org.junit.Test;
import org.mockito.Mockito;
import org.mockito.invocation.InvocationOnMock;
public class BDDMockitoTest {
PhoneBookService phoneBookService;
PhoneBookRepository phoneBookRepository;
String momContactName = "Mom";
String momPhoneNumber = "01234";
String xContactName = "x";
String tooLongPhoneNumber = "01111111111111";
@Before
public void init() {
phoneBookRepository = Mockito.mock(PhoneBookRepository.class);
phoneBookService = new PhoneBookService(phoneBookRepository);
}
@Test
public void givenValidContactName_whenSearchInPhoneBook_thenRetunPhoneNumber() {
given(phoneBookRepository.contains(momContactName)).willReturn(true);
given(phoneBookRepository.getPhoneNumberByContactName(momContactName))
.will((InvocationOnMock invocation) -> {
if(invocation.getArgument(0).equals(momContactName)) {
return momPhoneNumber;
} else {
return null;
}
});
String phoneNumber = phoneBookService.search(momContactName);
then(phoneBookRepository).should().contains(momContactName);
then(phoneBookRepository).should().getPhoneNumberByContactName(momContactName);
Assert.assertEquals(phoneNumber, momPhoneNumber);
}
@Test
public void givenInvalidContactName_whenSearch_thenRetunNull() {
given(phoneBookRepository.contains(xContactName)).willReturn(false);
String phoneNumber = phoneBookService.search(xContactName);
then(phoneBookRepository).should().contains(xContactName);
then(phoneBookRepository).should(never()).getPhoneNumberByContactName(xContactName);
Assert.assertEquals(phoneNumber, null);
}
@Test
public void givenValidContactNameAndPhoneNumber_whenRegister_thenSucceed() {
given(phoneBookRepository.contains(momContactName)).willReturn(false);
phoneBookService.register(momContactName, momPhoneNumber);
verify(phoneBookRepository).insert(momContactName, momPhoneNumber);
}
@Test
public void givenEmptyPhoneNumber_whenRegister_thenFail() {
given(phoneBookRepository.contains(momContactName)).willReturn(false);
phoneBookService.register(xContactName, "");
then(phoneBookRepository).should(never()).insert(momContactName, momPhoneNumber);
}
@Test
public void givenLongPhoneNumber_whenRegister_thenFail() {
given(phoneBookRepository.contains(xContactName)).willReturn(false);
willThrow(new RuntimeException())
.given(phoneBookRepository).insert(any(String.class), eq(tooLongPhoneNumber));
try {
phoneBookService.register(xContactName, tooLongPhoneNumber);
fail("Should throw exception");
} catch (RuntimeException ex) { }
then(phoneBookRepository).should(never()).insert(momContactName, tooLongPhoneNumber);
}
@Test
public void givenExistentContactName_whenRegister_thenFail() {
given(phoneBookRepository.contains(momContactName))
.willThrow(new RuntimeException("Name already exist"));
try {
phoneBookService.register(momContactName, momPhoneNumber);
fail("Should throw exception");
} catch(Exception ex) { }
then(phoneBookRepository).should(never()).insert(momContactName, momPhoneNumber);
}
}

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@ -0,0 +1,26 @@
package org.baeldung.bddmockito;
public interface PhoneBookRepository {
/**
* Insert phone record
* @param name Contact name
* @param phone Phone number
*/
void insert(String name, String phone);
/**
* Search for contact phone number
* @param name Contact name
* @return phone number
*/
String getPhoneNumberByContactName(String name);
/**
* Check if the phonebook contains this contact
* @param name Contact name
* @return true if this contact name exists
*/
boolean contains(String name);
}

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package org.baeldung.bddmockito;
public class PhoneBookService {
private PhoneBookRepository phoneBookRepository;
public PhoneBookService(PhoneBookRepository phoneBookRepository) {
this.phoneBookRepository = phoneBookRepository;
}
/**
* Register a contact
* @param name Contact name
* @param phone Phone number
*/
public void register(String name, String phone) {
if(!name.isEmpty() && !phone.isEmpty() && !phoneBookRepository.contains(name)) {
phoneBookRepository.insert(name, phone);
}
}
/**
* Search for a phone number by contact name
* @param name Contact name
* @return Phone number
*/
public String search(String name) {
if(!name.isEmpty() && phoneBookRepository.contains(name)) {
return phoneBookRepository.getPhoneNumberByContactName(name);
}
return null;
}
}

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<?xml version="1.0" encoding="UTF-8"?>
<XMLTutorials>
<tutorial tutId="01" type="xml">
<title>XML with Dom4J</title>
<description>XML handling with Dom4J</description>
<date>14/06/2016</date>
<author>Dom4J tech writer</author>
</tutorial>
</XMLTutorials>

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<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<tutorials>
<tutorial tutId="01" type="XML">
<author>Jaxb author</author>
<date>04/02/2015</date>
<description>XML Binding with Jaxb</description>
<title>XML with Jaxb</title>
</tutorial>
</tutorials>