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This commit is contained in:
tschiman
2017-05-31 16:31:17 -06:00
parent ea302a5f33 0b108e387d
commit 73b3c09dd0
66 changed files with 2010 additions and 166 deletions
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core-java-9/src/test/java/com/baeldung/java9/Java9OptionalTest.java
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@@ -0,0 +1,85 @@
package com.baeldung.java9;
public class Java9OptionalTest {
@Test
public void givenOptionalOfSome_whenToStream_thenShouldTreatItAsOneElementStream() {
//given
Optional<String> value = Optional.of("a");
//when
List<String> collect = value.stream().map(String::toUpperCase).collect(Collectors.toList());
//then
assertThat(collect).hasSameElementsAs(List.of("A"));
}
@Test
public void givenOptionalOfNone_whenToStream_thenShouldTreatItAsZeroElementStream() {
//given
Optional<String> value = Optional.empty();
//when
List<String> collect = value.stream().map(String::toUpperCase).collect(Collectors.toList());
//then
assertThat(collect).isEmpty();
}
@Test
public void givenOptional_whenPresent_thenShouldExecuteProperCallback() {
//given
Optional<String> value = Optional.of("properValue");
AtomicInteger successCounter = new AtomicInteger(0);
AtomicInteger onEmptyOptionalCounter = new AtomicInteger(0);
//when
value.ifPresentOrElse((v) -> successCounter.incrementAndGet(), onEmptyOptionalCounter::incrementAndGet);
//then
assertThat(successCounter.get()).isEqualTo(1);
assertThat(onEmptyOptionalCounter.get()).isEqualTo(0);
}
@Test
public void givenOptional_whenNotPresent_thenShouldExecuteProperCallback() {
//given
Optional<String> value = Optional.empty();
AtomicInteger successCounter = new AtomicInteger(0);
AtomicInteger onEmptyOptionalCounter = new AtomicInteger(0);
//when
value.ifPresentOrElse((v) -> successCounter.incrementAndGet(), onEmptyOptionalCounter::incrementAndGet);
//then
assertThat(successCounter.get()).isEqualTo(0);
assertThat(onEmptyOptionalCounter.get()).isEqualTo(1);
}
@Test
public void givenOptional_whenPresent_thenShouldTakeAValueFromIt() {
//given
String expected = "properValue";
Optional<String> value = Optional.of(expected);
Optional<String> defaultValue = Optional.of("default");
//when
Optional<String> result = value.or(() -> defaultValue);
//then
assertThat(result.get()).isEqualTo(expected);
}
@Test
public void givenOptional_whenEmpty_thenShouldTakeAValueFromOr() {
//given
String defaultString = "default";
Optional<String> value = Optional.empty();
Optional<String> defaultValue = Optional.of(defaultString);
//when
Optional<String> result = value.or(() -> defaultValue);
//then
assertThat(result.get()).isEqualTo(defaultString);
}
}
core-java/README.md
+2
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@@ -102,8 +102,10 @@
- [How to Perform a Simple HTTP Request in Java](http://www.baeldung.com/java-http-request)
- [Call Methods at Runtime Using Java Reflection](http://www.baeldung.com/java-method-reflection)
- [Guide to DelayQueue](http://www.baeldung.com/java-delay-queue)
- [Guide to UUID in JAVA] (http://www.baeldung.com/guide-to-uuid-in-java)
- [Comparing getPath(), getAbsolutePath(), and getCanonicalPath() in Java](http://www.baeldung.com/java-path)
- [How to Add a Single Element to a Stream](http://www.baeldung.com/java-stream-append-prepend)
- [Iterating Over Enum Values in Java](http://www.baeldung.com/java-enum-iteration)
- [A Guide to Java SynchronousQueue](http://www.baeldung.com/java-synchronous-queue)
- [Guide to the Java TransferQueue](http://www.baeldung.com/java-transfer-queue)
- [Kotlin Java Interoperability](http://www.baeldung.com/kotlin-java-interoperability)
core-java/src/main/java/com/baeldung/concurrent/diningphilosophers/DiningPhilosophers.java
+29
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@@ -0,0 +1,29 @@
package com.baeldung.concurrent.diningphilosophers;
public class DiningPhilosophers {
public static void main(String[] args) throws Exception {
Philosopher[] philosophers = new Philosopher[5];
Object[] forks = new Object[philosophers.length];
for (int i = 0; i < forks.length; i++) {
forks[i] = new Object();
}
for (int i = 0; i < philosophers.length; i++) {
Object leftFork = forks[i];
Object rightFork = forks[(i + 1) % forks.length];
if (i == philosophers.length - 1) {
philosophers[i] = new Philosopher(rightFork, leftFork); // The last philosopher picks up the right fork first
} else {
philosophers[i] = new Philosopher(leftFork, rightFork);
}
Thread t = new Thread(philosophers[i], "Philosopher " + (i + 1));
t.start();
}
}
}
core-java/src/main/java/com/baeldung/concurrent/diningphilosophers/Philosopher.java
+36
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@@ -0,0 +1,36 @@
package com.baeldung.concurrent.diningphilosophers;
public class Philosopher implements Runnable {
private final Object leftFork;
private final Object rightFork;
public Philosopher(Object left, Object right) {
this.leftFork = left;
this.rightFork = right;
}
private void doAction(String action) throws InterruptedException {
System.out.println(Thread.currentThread().getName() + " " + action);
Thread.sleep(((int) (Math.random() * 100)));
}
@Override public void run() {
try {
while (true) {
doAction(System.nanoTime() + ": Thinking"); // thinking
synchronized (leftFork) {
doAction(System.nanoTime() + ": Picked up left fork");
synchronized (rightFork) {
doAction(System.nanoTime() + ": Picked up right fork - eating"); // eating
doAction(System.nanoTime() + ": Put down right fork");
}
doAction(System.nanoTime() + ": Put down left fork. Returning to thinking");
}
}
} catch (InterruptedException e) {
Thread.currentThread().interrupt();
return;
}
}
}
core-java/src/main/java/com/baeldung/regexp/EscapingChars.java
-25
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@@ -1,25 +0,0 @@
package com.baeldung.regexp;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class EscapingChars {
public boolean isMatching(String input, String pattern) {
return input.matches(pattern);
}
public int splitAndCountWords(String input, String pattern) {
return input.split(pattern).length;
}
public int splitAndCountWordsUsingQuoteMethod(String input, String pattern) {
return input.split(Pattern.quote(pattern)).length;
}
public String changeCurrencySymbol(String input, String pattern,
String correctStr) {
Pattern p = Pattern.compile(pattern);
Matcher m = p.matcher(input);
return m.replaceAll(correctStr);
}
}
core-java/src/main/java/com/baeldung/stream/StreamApi.java
+24
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@@ -0,0 +1,24 @@
package com.baeldung.stream;
import java.util.List;
import java.util.stream.Stream;
public class StreamApi {
public String getLastElementUsingReduce(List<String> valueList) {
Stream<String> stream = valueList.stream();
return stream.reduce((first, second) -> second).orElse(null);
}
public Integer getInfiniteStreamLastElementUsingReduce() {
Stream<Integer> stream = Stream.iterate(0, i -> i + 1);
return stream.limit(20).reduce((first, second) -> second).orElse(null);
}
public String getLastElementUsingSkip(List<String> valueList) {
long count = valueList.stream().count();
Stream<String> stream = valueList.stream();
return stream.skip(count - 1).findFirst().orElse(null);
}
}
core-java/src/main/java/com/baeldung/string/StringHelper.java
+5 -5
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@@ -2,23 +2,23 @@ package com.baeldung.string;
import java.util.Optional;
public class StringHelper {
public static String removeLastChar(String s) {
class StringHelper {
static String removeLastChar(String s) {
return (s == null || s.length() == 0) ? s : (s.substring(0, s.length() - 1));
}
public static String removeLastCharRegex(String s) {
static String removeLastCharRegex(String s) {
return (s == null) ? s : s.replaceAll(".$", "");
}
public static String removeLastCharOptional(String s) {
static String removeLastCharOptional(String s) {
return Optional.ofNullable(s)
.filter(str -> str.length() != 0)
.map(str -> str.substring(0, str.length() - 1))
.orElse(s);
}
public static String removeLastCharRegexOptional(String s) {
static String removeLastCharRegexOptional(String s) {
return Optional.ofNullable(s)
.map(str -> str.replaceAll(".$", ""))
.orElse(s);
core-java/src/main/java/com/baeldung/uuid/UUIDGenerator.java
+118
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@@ -0,0 +1,118 @@
package com.baeldung.uuid;
import java.io.UnsupportedEncodingException;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.util.UUID;
public class UUIDGenerator {
/**
* These are predefined UUID for name spaces
*/
private static final String NAMESPACE_DNS = "6ba7b810-9dad-11d1-80b4-00c04fd430c8";
private static final String NAMESPACE_URL = "6ba7b811-9dad-11d1-80b4-00c04fd430c8";
private static final String NAMESPACE_OID = "6ba7b812-9dad-11d1-80b4-00c04fd430c8";
private static final String NAMESPACE_X500 = "6ba7b814-9dad-11d1-80b4-00c04fd430c8";
private static final char[] hexArray = "0123456789ABCDEF".toCharArray();
public static void main(String[] args) {
try {
System.out.println("Type 3 : " + generateType3UUID(NAMESPACE_DNS, "google.com"));
System.out.println("Type 4 : " + generateType4UUID());
System.out.println("Type 5 : " + generateType5UUID(NAMESPACE_URL, "google.com"));
System.out.println("Unique key : " + generateUniqueKeysWithUUIDAndMessageDigest());
} catch (NoSuchAlgorithmException | UnsupportedEncodingException e) {
e.printStackTrace();
}
}
/**
* Type 4 UUID Generation
*/
public static UUID generateType4UUID() {
UUID uuid = UUID.randomUUID();
return uuid;
}
/**
* Type 3 UUID Generation
*
* @throws UnsupportedEncodingException
*/
public static UUID generateType3UUID(String namespace, String name) throws UnsupportedEncodingException {
String source = namespace + name;
byte[] bytes = source.getBytes("UTF-8");
UUID uuid = UUID.nameUUIDFromBytes(bytes);
return uuid;
}
/**
* Type 5 UUID Generation
*
* @throws UnsupportedEncodingException
*/
public static UUID generateType5UUID(String namespace, String name) throws UnsupportedEncodingException {
String source = namespace + name;
byte[] bytes = source.getBytes("UTF-8");
UUID uuid = type5UUIDFromBytes(bytes);
return uuid;
}
public static UUID type5UUIDFromBytes(byte[] name) {
MessageDigest md;
try {
md = MessageDigest.getInstance("SHA-1");
} catch (NoSuchAlgorithmException nsae) {
throw new InternalError("MD5 not supported", nsae);
}
byte[] bytes = md.digest(name);
bytes[6] &= 0x0f; /* clear version */
bytes[6] |= 0x50; /* set to version 5 */
bytes[8] &= 0x3f; /* clear variant */
bytes[8] |= 0x80; /* set to IETF variant */
return constructType5UUID(bytes);
}
private static UUID constructType5UUID(byte[] data) {
long msb = 0;
long lsb = 0;
assert data.length == 16 : "data must be 16 bytes in length";
for (int i=0; i<8; i++)
msb = (msb << 8) | (data[i] & 0xff);
for (int i=8; i<16; i++)
lsb = (lsb << 8) | (data[i] & 0xff);
return new UUID(msb, lsb);
}
/**
* Unique Keys Generation Using Message Digest and Type 4 UUID
*
* @throws NoSuchAlgorithmException
* @throws UnsupportedEncodingException
*/
public static String generateUniqueKeysWithUUIDAndMessageDigest() throws NoSuchAlgorithmException, UnsupportedEncodingException {
MessageDigest salt = MessageDigest.getInstance("SHA-256");
salt.update(UUID.randomUUID()
.toString()
.getBytes("UTF-8"));
String digest = bytesToHex(salt.digest());
return digest;
}
public static String bytesToHex(byte[] bytes) {
char[] hexChars = new char[bytes.length * 2];
for (int j = 0; j < bytes.length; j++) {
int v = bytes[j] & 0xFF;
hexChars[j * 2] = hexArray[v >>> 4];
hexChars[j * 2 + 1] = hexArray[v & 0x0F];
}
return new String(hexChars);
}
}
core-java/src/test/java/com/baeldung/regexp/EscapingCharsTest.java
+33 -29
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@@ -3,6 +3,8 @@ package com.baeldung.regexp;
import static junit.framework.TestCase.assertEquals;
import static org.junit.Assert.assertThat;
import static org.hamcrest.CoreMatchers.*;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import org.junit.Test;
@@ -11,57 +13,59 @@ public class EscapingCharsTest {
public void givenRegexWithDot_whenMatchingStr_thenMatches() {
String strInput = "foof";
String strRegex = "foo.";
EscapingChars e = new EscapingChars();
assertEquals(true, e.isMatching(strInput, strRegex));
assertEquals(true, strInput.matches(strRegex));
}
@Test
public void givenRegexWithDotEsc_whenMatchingStr_thenNotMatching() {
String strInput = "foof";
String strRegex = "foo\\.";
EscapingChars e = new EscapingChars();
assertEquals(false, e.isMatching(strInput, strRegex));
assertEquals(false, strInput.matches(strRegex));
}
@Test
public void givenRegexWithPipeEscaped_whenSplitStr_thenSplits() {
String strInput = "foo|bar|hello|world";
String strRegex = "\\Q|\\E";
EscapingChars e = new EscapingChars();
assertEquals(4, e.splitAndCountWords(strInput, strRegex));
assertEquals(4, strInput.split(strRegex).length);
}
@Test
public void givenRegexWithPipeEscQuoteMeth_whenSplitStr_thenSplits() {
String strInput = "foo|bar|hello|world";
String strRegex = "|";
EscapingChars e = new EscapingChars();
assertEquals(4, e.splitAndCountWordsUsingQuoteMethod(strInput, strRegex));
assertEquals(4,strInput.split(Pattern.quote(strRegex)).length);
}
@Test
public void givenRegexWithDollar_whenReplacing_thenNotReplace() {
String strInput = "I gave $50 to my brother.He bought candy for $35. Now he has $15 left.";
String strInput = "I gave $50 to my brother."
+ "He bought candy for $35. Now he has $15 left.";
String strRegex = "$";
String strReplacement = "�";
String output = "I gave �50 to my brother.He bought candy for �35. Now he has �15 left.";
EscapingChars e = new EscapingChars();
assertThat(output, not(equalTo(e.changeCurrencySymbol(strInput, strRegex, strReplacement))));
String strReplacement = "£";
String output = "I gave £50 to my brother."
+ "He bought candy for £35. Now he has £15 left.";
Pattern p = Pattern.compile(strRegex);
Matcher m = p.matcher(strInput);
assertThat(output, not(equalTo(m.replaceAll(strReplacement))));
}
@Test
public void givenRegexWithDollarEsc_whenReplacing_thenReplace() {
String strInput = "I gave $50 to my brother. He bought candy for $35. Now he has $15 left.";
String strInput = "I gave $50 to my brother."
+ "He bought candy for $35. Now he has $15 left.";
String strRegex = "\\$";
String strReplacement = "�";
String output = "I gave �50 to my brother. He bought candy for �35. Now he has �15 left.";
EscapingChars e = new EscapingChars();
assertEquals(output, e.changeCurrencySymbol(strInput, strRegex, strReplacement));
String strReplacement = "£";
String output = "I gave £50 to my brother."
+ "He bought candy for £35. Now he has £15 left.";
Pattern p = Pattern.compile(strRegex);
Matcher m = p.matcher(strInput);
assertEquals(output,m.replaceAll(strReplacement));
}
}
core-java/src/test/java/com/baeldung/stream/StreamApiTest.java
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@@ -0,0 +1,43 @@
package com.baeldung.stream;
import static org.junit.Assert.assertEquals;
import java.util.ArrayList;
import java.util.List;
import org.junit.Test;
public class StreamApiTest {
private StreamApi streamApi = new StreamApi();
@Test
public void givenList_whenGetLastElementUsingReduce_thenReturnLastElement() {
List<String> valueList = new ArrayList<String>();
valueList.add("Joe");
valueList.add("John");
valueList.add("Sean");
String last = streamApi.getLastElementUsingReduce(valueList);
assertEquals("Sean", last);
}
@Test
public void givenInfiniteStream_whenGetInfiniteStreamLastElementUsingReduce_thenReturnLastElement() {
Integer last = streamApi.getInfiniteStreamLastElementUsingReduce();
assertEquals(new Integer(19), last);
}
@Test
public void givenListAndCount_whenGetLastElementUsingSkip_thenReturnLastElement() {
List<String> valueList = new ArrayList<String>();
valueList.add("Joe");
valueList.add("John");
valueList.add("Sean");
String last = streamApi.getLastElementUsingSkip(valueList);
assertEquals("Sean", last);
}
}
core-java/src/test/java/org/baeldung/java/JavaRandomUnitTest.java
+3 -1
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@@ -167,9 +167,11 @@ public class JavaRandomUnitTest {
final int leftLimit = 97; // letter 'a'
final int rightLimit = 122; // letter 'z'
final int targetStringLength = 10;
final Random random = new Random();
final StringBuilder buffer = new StringBuilder(targetStringLength);
for (int i = 0; i < targetStringLength; i++) {
final int randomLimitedInt = leftLimit + (int) (new Random().nextFloat() * (rightLimit - leftLimit + 1));
final int randomLimitedInt = leftLimit + (int) (random.nextFloat() * (rightLimit - leftLimit + 1));
buffer.append((char) randomLimitedInt);
}
final String generatedString = buffer.toString();
ejb/ejb-session-beans/pom.xml
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@@ -0,0 +1,106 @@
<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>
<parent>
<groupId>com.baeldung.ejb</groupId>
<artifactId>ejb</artifactId>
<version>1.0-SNAPSHOT</version>
</parent>
<artifactId>ejb-session-beans</artifactId>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<arquillian-bom.version>1.1.12.Final</arquillian-bom.version>
<shrinkwrap-resolver-impl-maven.version>2.2.6</shrinkwrap-resolver-impl-maven.version>
<arquillian-junit-container.version>1.1.12.Final</arquillian-junit-container.version>
<arquillian-glassfish-embedded-3.1.version>1.0.0.Final</arquillian-glassfish-embedded-3.1.version>
<junit.version>4.12</junit.version>
<javaee-api.version>7.0</javaee-api.version>
</properties>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.jboss.arquillian</groupId>
<artifactId>arquillian-bom</artifactId>
<version>1.1.13.Final</version>
<scope>import</scope>
<type>pom</type>
</dependency>
</dependencies>
</dependencyManagement>
<dependencies>
<dependency>
<groupId>javax</groupId>
<artifactId>javaee-api</artifactId>
<version>${javaee-api.version}</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.jboss.arquillian.junit</groupId>
<artifactId>arquillian-junit-container</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<profiles>
<profile>
<id>arquillian-glassfish-embedded</id>
<activation>
<activeByDefault>true</activeByDefault>
</activation>
<dependencies>
<dependency>
<groupId>org.jboss.arquillian.container</groupId>
<artifactId>arquillian-glassfish-embedded-3.1</artifactId>
<version>1.0.0.CR4</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.glassfish.main.extras</groupId>
<artifactId>glassfish-embedded-all</artifactId>
<version>3.1.2</version>
<scope>test</scope>
</dependency>
</dependencies>
</profile>
</profiles>
<build>
<plugins>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.1</version>
<configuration>
<source>1.8</source>
<target>1.8</target>
</configuration>
</plugin>
<plugin>
<artifactId>maven-war-plugin</artifactId>
<version>2.4</version>
<configuration>
<failOnMissingWebXml>false</failOnMissingWebXml>
</configuration>
</plugin>
<plugin>
<artifactId>maven-surefire-plugin</artifactId>
<version>2.17</version>
</plugin>
</plugins>
</build>
</project>
ejb/ejb-session-beans/src/main/java/com/baeldung/ejb/stateful/EJBClient1.java
+11
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@@ -0,0 +1,11 @@
package com.baeldung.ejb.stateful;
import javax.ejb.EJB;
public class EJBClient1 {
@EJB
public StatefulEJB statefulEJB;
}
ejb/ejb-session-beans/src/main/java/com/baeldung/ejb/stateful/EJBClient2.java
+11
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@@ -0,0 +1,11 @@
package com.baeldung.ejb.stateful;
import javax.ejb.EJB;
public class EJBClient2 {
@EJB
public StatefulEJB statefulEJB;
}
ejb/ejb-session-beans/src/main/java/com/baeldung/ejb/stateful/StatefulEJB.java
+10
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@@ -0,0 +1,10 @@
package com.baeldung.ejb.stateful;
import javax.ejb.Stateful;
@Stateful
public class StatefulEJB {
public String name;
}
ejb/ejb-session-beans/src/main/java/com/baeldung/ejb/stateless/EJBClient1.java
+10
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@@ -0,0 +1,10 @@
package com.baeldung.ejb.stateless;
import javax.ejb.EJB;
public class EJBClient1 {
@EJB
public StatelessEJB statelessEJB;
}
ejb/ejb-session-beans/src/main/java/com/baeldung/ejb/stateless/EJBClient2.java
+11
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@@ -0,0 +1,11 @@
package com.baeldung.ejb.stateless;
import javax.ejb.EJB;
public class EJBClient2 {
@EJB
public StatelessEJB statelessEJB;
}
ejb/ejb-session-beans/src/main/java/com/baeldung/ejb/stateless/StatelessEJB.java
+11
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@@ -0,0 +1,11 @@
package com.baeldung.ejb.stateless;
import javax.ejb.Stateless;
@Stateless
public class StatelessEJB {
public String name;
}
ejb/ejb-session-beans/src/test/java/com/baeldung/ejb/test/stateful/StatefulEJBTest.java
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@@ -0,0 +1,51 @@
package com.baeldung.ejb.test.stateful;
import org.jboss.arquillian.container.test.api.Deployment;
import org.jboss.arquillian.junit.Arquillian;
import org.jboss.shrinkwrap.api.ShrinkWrap;
import org.jboss.shrinkwrap.api.asset.EmptyAsset;
import org.jboss.shrinkwrap.api.spec.JavaArchive;
import org.junit.Assert;
import org.junit.Test;
import org.junit.runner.RunWith;
import com.baeldung.ejb.stateful.EJBClient1;
import com.baeldung.ejb.stateful.EJBClient2;
import com.baeldung.ejb.stateful.StatefulEJB;
import javax.inject.Inject;
@RunWith(Arquillian.class)
public class StatefulEJBTest {
@Inject
private EJBClient1 ejbClient1;
@Inject
private EJBClient2 ejbClient2;
@Test
public void givenOneStatefulBean_whenTwoClientsSetValueOnBean_thenClientStateIsMaintained() {
// act
ejbClient1.statefulEJB.name = "Client 1";
ejbClient2.statefulEJB.name = "Client 2";
// assert
Assert.assertNotEquals(ejbClient1.statefulEJB.name, ejbClient2.statefulEJB.name);
Assert.assertEquals("Client 1", ejbClient1.statefulEJB.name);
Assert.assertEquals("Client 2", ejbClient2.statefulEJB.name);
}
@Deployment
public static JavaArchive createDeployment() {
return ShrinkWrap.create(JavaArchive.class)
.addClass(StatefulEJB.class)
.addClass(EJBClient1.class)
.addClass(EJBClient2.class)
.addAsManifestResource(EmptyAsset.INSTANCE, "beans.xml");
}
}
ejb/ejb-session-beans/src/test/java/com/baeldung/ejb/test/stateless/StatelessEJBTest.java
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@@ -0,0 +1,62 @@
package com.baeldung.ejb.test.stateless;
import org.jboss.arquillian.container.test.api.Deployment;
import org.jboss.arquillian.junit.Arquillian;
import org.jboss.shrinkwrap.api.ShrinkWrap;
import org.jboss.shrinkwrap.api.asset.EmptyAsset;
import org.jboss.shrinkwrap.api.spec.JavaArchive;
import org.junit.Assert;
import org.junit.Test;
import org.junit.runner.RunWith;
import com.baeldung.ejb.stateless.EJBClient1;
import com.baeldung.ejb.stateless.EJBClient2;
import com.baeldung.ejb.stateless.StatelessEJB;
import javax.inject.Inject;
@RunWith(Arquillian.class)
public class StatelessEJBTest {
@Inject
private EJBClient1 ejbClient1;
@Inject
private EJBClient2 ejbClient2;
@Test
public void givenOneStatelessBean_whenStateIsSetInOneBean_secondBeanShouldHaveSameState() {
// act
ejbClient1.statelessEJB.name = "Client 1";
// assert
Assert.assertEquals("Client 1", ejbClient1.statelessEJB.name);
Assert.assertEquals("Client 1", ejbClient2.statelessEJB.name);
}
@Test
public void givenOneStatelessBean_whenStateIsSetInBothBeans_secondBeanShouldHaveSecondBeanState() {
// act
ejbClient1.statelessEJB.name = "Client 1";
ejbClient2.statelessEJB.name = "Client 2";
// assert
Assert.assertEquals("Client 2", ejbClient2.statelessEJB.name);
}
@Deployment
public static JavaArchive createDeployment() {
return ShrinkWrap.create(JavaArchive.class)
.addClass(StatelessEJB.class)
.addClass(EJBClient1.class)
.addClass(EJBClient2.class)
.addAsManifestResource(EmptyAsset.INSTANCE, "beans.xml");
}
}
ejb/pom.xml
+8 -1
View File
@@ -40,7 +40,12 @@
<version>1.0-SNAPSHOT</version>
<type>ejb</type>
</dependency>
<dependency>
<groupId>com.baeldung.ejb</groupId>
<artifactId>ejb-session-beans</artifactId>
<version>1.0-SNAPSHOT</version>
<type>ejb</type>
</dependency>
<dependency>
<groupId>javax</groupId>
<artifactId>javaee-api</artifactId>
@@ -75,5 +80,7 @@
<modules>
<module>ejb-remote</module>
<module>ejb-client</module>
<module>ejb-session-beans</module>
<module>ejb-session-beans-client</module>
</modules>
</project>
hibernate5/pom.xml
+33
View File
@@ -15,6 +15,8 @@
<url>http://maven.apache.org</url>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<!-- Maven plugins -->
<maven-compiler-plugin.version>3.6.0</maven-compiler-plugin.version>
</properties>
<dependencies>
<dependency>
@@ -22,6 +24,11 @@
<artifactId>hibernate-core</artifactId>
<version>5.2.9.Final</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
</dependency>
<dependency>
<groupId>com.h2database</groupId>
<artifactId>h2</artifactId>
@@ -37,6 +44,32 @@
</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>
<forkCount>3</forkCount>
<reuseForks>true</reuseForks>
<excludes>
<exclude>**/*IntegrationTest.java</exclude>
<exclude>**/*LiveTest.java</exclude>
</excludes>
</configuration>
</plugin>
</plugins>
</build>
</project>
hibernate5/src/main/java/com/baeldung/hibernate/HibernateMultiTenantUtil.java
+46 -26
View File
@@ -1,5 +1,9 @@
package com.baeldung.hibernate;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.net.URL;
import java.util.HashMap;
import java.util.Map;
import java.util.Properties;
@@ -20,44 +24,56 @@ import com.baeldung.hibernate.pojo.Supplier;
public class HibernateMultiTenantUtil {
private static SessionFactory sessionFactory;
private static Map<String, ConnectionProvider> connectionProviderMap = new HashMap<>();
private static final String[] tenantDBNames = { "mydb1","mydb2"};
private static final String[] tenantDBNames = { "mydb1", "mydb2" };
public static SessionFactory getSessionFactory() throws UnsupportedTenancyException {
public static SessionFactory getSessionFactory() throws UnsupportedTenancyException, IOException {
if (sessionFactory == null) {
Configuration configuration = new Configuration().configure();
ServiceRegistry serviceRegistry = configureServiceRegistry(configuration);
sessionFactory = makeSessionFactory (serviceRegistry);
// sessionFactory = configuration.buildSessionFactory(serviceRegistry);
// Configuration configuration = new Configuration().configure();
ServiceRegistry serviceRegistry = configureServiceRegistry();
sessionFactory = makeSessionFactory(serviceRegistry);
}
return sessionFactory;
}
private static SessionFactory makeSessionFactory(ServiceRegistry serviceRegistry) {
MetadataSources metadataSources = new MetadataSources( serviceRegistry );
for(Class annotatedClasses : getAnnotatedClasses()) {
metadataSources.addAnnotatedClass( annotatedClasses );
MetadataSources metadataSources = new MetadataSources(serviceRegistry);
for (Class annotatedClasses : getAnnotatedClasses()) {
metadataSources.addAnnotatedClass(annotatedClasses);
}
Metadata metadata = metadataSources.buildMetadata();
return metadata.getSessionFactoryBuilder().build();
return metadata.getSessionFactoryBuilder()
.build();
}
private static Class<?>[] getAnnotatedClasses() {
return new Class<?>[] {
Supplier.class
};
return new Class<?>[] { Supplier.class };
}
private static ServiceRegistry configureServiceRegistry(Configuration configuration) throws UnsupportedTenancyException {
Properties properties = configuration.getProperties();
private static ServiceRegistry configureServiceRegistry() throws UnsupportedTenancyException, IOException {
// Properties properties = configuration.getProperties();
Properties properties = getProperties();
connectionProviderMap = setUpConnectionProviders(properties, tenantDBNames);
properties.put(AvailableSettings.MULTI_TENANT_CONNECTION_PROVIDER, new ConfigurableMultiTenantConnectionProvider(connectionProviderMap));
return new StandardServiceRegistryBuilder().applySettings(properties).build();
return new StandardServiceRegistryBuilder().applySettings(properties)
.build();
}
private static Properties getProperties() throws IOException {
Properties properties = new Properties();
URL propertiesURL = Thread.currentThread()
.getContextClassLoader()
.getResource("hibernate.properties");
FileInputStream inputStream = new FileInputStream(propertiesURL.getFile());
properties.load(inputStream);
System.out.println("LOADED PROPERTIES FROM hibernate.properties");
return properties;
}
private static Map<String, ConnectionProvider> setUpConnectionProviders(Properties properties, String[] tenantNames) throws UnsupportedTenancyException {
@@ -66,23 +82,27 @@ public class HibernateMultiTenantUtil {
DriverManagerConnectionProviderImpl connectionProvider = new DriverManagerConnectionProviderImpl();
String tenantStrategy = properties.getProperty("hibernate.multiTenancy");
System.out.println("Strategy:"+tenantStrategy);
System.out.println("Strategy:" + tenantStrategy);
properties.put(Environment.URL, tenantUrl(properties.getProperty(Environment.URL), tenant, tenantStrategy));
System.out.println("URL:"+properties.getProperty(Environment.URL));
System.out.println("URL:" + properties.getProperty(Environment.URL));
connectionProvider.configure(properties);
System.out.println("Tenant:"+tenant);
System.out.println("Tenant:" + tenant);
providerMap.put(tenant, connectionProvider);
}
System.out.println("Added connections for:");
providerMap.keySet().stream().forEach(System.out::println);
providerMap.keySet()
.stream()
.forEach(System.out::println);
return providerMap;
}
private static Object tenantUrl(String originalUrl, String tenant, String tenantStrategy) throws UnsupportedTenancyException {
if (tenantStrategy.toUpperCase().equals("DATABASE")) {
if (tenantStrategy.toUpperCase()
.equals("DATABASE")) {
return originalUrl.replace(DEFAULT_DB_NAME, tenant);
} else if (tenantStrategy.toUpperCase().equals("SCHEMA")) {
} else if (tenantStrategy.toUpperCase()
.equals("SCHEMA")) {
return originalUrl + String.format(SCHEMA_TOKEN, tenant);
} else {
throw new UnsupportedTenancyException("Not yet supported");
hibernate5/src/main/resources/hibernate.cfg.xml
-14
View File
@@ -1,14 +0,0 @@
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
"http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
<session-factory>
<property name="hibernate.connection.driver_class">org.h2.Driver</property>
<property name="hibernate.connection.url">jdbc:h2:mem:mydb1;DB_CLOSE_DELAY=-1</property>
<property name="hibernate.connection.username">sa</property>
<property name="connection.password"/>
<property name="hibernate.dialect">org.hibernate.dialect.H2Dialect</property>
<property name="hibernate.multiTenancy">DATABASE</property>
</session-factory>
</hibernate-configuration>
hibernate5/src/main/resources/hibernate.properties
+8
View File
@@ -0,0 +1,8 @@
hibernate.connection.driver_class=org.h2.Driver
hibernate.connection.url=jdbc:h2:mem:mydb1;DB_CLOSE_DELAY=-1
hibernate.connection.username=sa
jdbc.password=
hibernate.dialect=org.hibernate.dialect.H2Dialect
hibernate.show_sql=true
hibernate.multiTenancy=DATABASE
hibernate5/src/test/java/com/baeldung/hibernate/MultiTenantHibernateIntegrationTest.java
+46 -40
View File
@@ -1,65 +1,71 @@
package com.baeldung.hibernate;
import com.baeldung.hibernate.pojo.Supplier;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.junit.Test;
import static org.junit.Assert.assertNotEquals;
import java.io.IOException;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.sql.Statement;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.junit.Before;
import org.junit.Test;
import com.baeldung.hibernate.pojo.Supplier;
public class MultiTenantHibernateIntegrationTest {
@Test
public void givenDBMode_whenFetchingSuppliers_thenComparingFromDbs () {
SessionFactory sessionFactory;
try {
sessionFactory = HibernateMultiTenantUtil.getSessionFactory();
Session db1Session = sessionFactory
.withOptions().tenantIdentifier("mydb1").openSession();
initDb1(db1Session);
Transaction transaction = db1Session.getTransaction();
transaction.begin();
Supplier supplierFromDB1 = (Supplier)db1Session.createCriteria(Supplier.class).list().get(0);
transaction.commit();
Session db2Session = sessionFactory
.withOptions().tenantIdentifier("mydb2").openSession();
initDb2(db2Session);
db2Session.getTransaction().begin();
Supplier supplierFromDB2 = (Supplier) db2Session.createCriteria(Supplier.class).list().get(0);
db2Session.getTransaction().commit();
System.out.println(supplierFromDB1);
System.out.println(supplierFromDB2);
assertNotEquals(supplierFromDB1, supplierFromDB2);
} catch (UnsupportedTenancyException e) {
e.printStackTrace();
}
public void givenDBMode_whenFetchingSuppliers_thenComparingFromDbs() throws UnsupportedTenancyException, IOException {
SessionFactory sessionFactory = HibernateMultiTenantUtil.getSessionFactory();
Session db1Session = sessionFactory.withOptions().tenantIdentifier("mydb1").openSession();
initDb1(db1Session);
Transaction transaction = db1Session.getTransaction();
transaction.begin();
Supplier supplierFromDB1 = (Supplier) db1Session.createCriteria(Supplier.class).list().get(0);
transaction.commit();
Session db2Session = sessionFactory.withOptions().tenantIdentifier("mydb2").openSession();
initDb2(db2Session);
db2Session.getTransaction().begin();
Supplier supplierFromDB2 = (Supplier) db2Session.createCriteria(Supplier.class).list().get(0);
db2Session.getTransaction().commit();
System.out.println(supplierFromDB1);
System.out.println(supplierFromDB2);
assertNotEquals(supplierFromDB1, supplierFromDB2);
}
private void initDb1(Session db1Session) {
System.out.println("Init DB1");
Transaction transaction = db1Session.getTransaction();
transaction.begin();
db1Session.createSQLQuery("DROP ALL OBJECTS").executeUpdate();
db1Session.createSQLQuery("create table Supplier (id integer generated by default as identity, country varchar(255), name varchar(255), primary key (id))").executeUpdate();
db1Session
.createSQLQuery(
"create table Supplier (id integer generated by default as identity, country varchar(255), name varchar(255), primary key (id))")
.executeUpdate();
db1Session.createSQLQuery("insert into Supplier (id, country, name) values (null, 'John', 'USA')").executeUpdate();
transaction.commit();
}
private void initDb2(Session db2Session) {
System.out.println("Init DB2");
Transaction transaction = db2Session.getTransaction();
transaction.begin();
db2Session.createSQLQuery("DROP ALL OBJECTS").executeUpdate();
db2Session.createSQLQuery("create table Supplier (id integer generated by default as identity, country varchar(255), name varchar(255), primary key (id))").executeUpdate();
db2Session
.createSQLQuery(
"create table Supplier (id integer generated by default as identity, country varchar(255), name varchar(255), primary key (id))")
.executeUpdate();
db2Session.createSQLQuery("insert into Supplier (id, country, name) values (null, 'Miller', 'UK')").executeUpdate();
transaction.commit();
}
hibernate5/src/test/java/hibernate.properties
+8
View File
@@ -0,0 +1,8 @@
hibernate.connection.driver_class=org.h2.Driver
hibernate.connection.url=jdbc:h2:mem:mydb1;DB_CLOSE_DELAY=-1
hibernate.connection.username=sa
jdbc.password=
hibernate.dialect=org.hibernate.dialect.H2Dialect
hibernate.show_sql=true
hibernate.multiTenancy=DATABASE
junit5/src/test/java/com/baeldung/DynamicTestsExample.java
+3 -24
View File
@@ -3,7 +3,6 @@ package com.baeldung;
import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertTrue;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.HashMap;
@@ -56,32 +55,12 @@ public class DynamicTestsExample {
// sample input and output
List<String> inputList =
new ArrayList<>(Arrays.asList("www.somedomain.com", "www.anotherdomain.com", "www.yetanotherdomain.com"));
Arrays.asList("www.somedomain.com", "www.anotherdomain.com", "www.yetanotherdomain.com");
List<String> outputList =
new ArrayList<>(Arrays.asList("154.174.10.56", "211.152.104.132", "178.144.120.156"));
Arrays.asList("154.174.10.56", "211.152.104.132", "178.144.120.156");
// input generator that generates inputs using inputList
Iterator<String> inputGenerator = new Iterator<String>() {
String current;
int size = inputList.size();
int index = 0;
@Override
public boolean hasNext() {
if(index == size) {
return false;
}
current = inputList.get(index);
index++;
return true;
}
@Override
public String next() {
return current;
}
};
Iterator<String> inputGenerator = inputList.iterator();
// a display name generator that creates a different name based on the input
Function<String, String> displayNameGenerator = (input) -> "Resolving: " + input;
libraries/pom.xml
+10
View File
@@ -276,6 +276,16 @@
<version>2.3.0</version>
</dependency>
<dependency>
<groupId>one.util</groupId>
<artifactId>streamex</artifactId>
<version>0.6.5</version>
</dependency>
<dependency>
<groupId>org.jooq</groupId>
<artifactId>jool</artifactId>
<version>0.9.12</version>
</dependency>
</dependencies>
<properties>
<multiverse.version>0.7.0</multiverse.version>
libraries/src/test/java/com/baeldung/stream/JoolMergeStreamsTest.java
+35
View File
@@ -0,0 +1,35 @@
package com.baeldung.stream;
import org.jooq.lambda.Seq;
import org.junit.Assert;
import org.junit.Test;
import java.util.Arrays;
import static junit.framework.TestCase.assertEquals;
public class JoolMergeStreamsTest {
@Test
public void givenTwoStreams_whenMergingStreams_thenResultingStreamContainsElementsFromBothStreams() {
Seq<Integer> seq1 = Seq.of(1, 3, 5);
Seq<Integer> seq2 = Seq.of(2, 4, 6);
Seq<Integer> resultingSeq = seq1.append(seq2);
assertEquals(Arrays.asList(1, 3, 5, 2, 4, 6),
resultingSeq.toList());
}
@Test
public void givenThreeStreams_whenAppendingAndPrependingStreams_thenResultingStreamContainsElementsFromAllStreams() {
Seq<String> seq = Seq.of("foo", "bar");
Seq<String> openingBracketSeq = Seq.of("[");
Seq<String> closingBracketSeq = Seq.of("]");
Seq<String> resultingStream = seq.append(closingBracketSeq)
.prepend(openingBracketSeq);
Assert.assertEquals(Arrays.asList("[", "foo", "bar", "]"),
resultingStream.toList());
}
}

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