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BAEL-3592: Comparison of Spring Beans and Java Enterprise Beans (#8750)

This commit is contained in:
Sampada 2020-02-19 03:12:50 +05:30 committed by GitHub
parent a223680945
commit 0ae112cf3e
15 changed files with 564 additions and 0 deletions
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40
spring-ejb/ejb-beans/pom.xml
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@ -37,6 +37,42 @@
<artifactId>tomee-embedded</artifactId>
<version>${tomee-embedded.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>${springframework.version}</version>
</dependency>
<!-- Dependency for EJB javax -->
<dependency>
<groupId>javax.ejb</groupId>
<artifactId>javax.ejb-api</artifactId>
<version>${javax.ejb-api.version}</version>
<scope>provided</scope>
</dependency>
<!-- Spring JMS -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jms</artifactId>
<version>${springframework.version}</version>
<exclusions>
<exclusion>
<artifactId>commons-logging</artifactId>
<groupId>commons-logging</groupId>
</exclusion>
</exclusions>
</dependency>
<!-- ActiveMQ -->
<dependency>
<groupId>org.apache.activemq</groupId>
<artifactId>activemq-broker</artifactId>
<version>${activemq.broker.version}</version>
</dependency>
<dependency>
<groupId>org.apache.activemq.tooling</groupId>
<artifactId>activemq-junit</artifactId>
<version>${activemq.junit.version}</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.jboss.arquillian.junit</groupId>
<artifactId>arquillian-junit-container</artifactId>
@ -81,6 +117,10 @@
<tomee-embedded.version>1.7.5</tomee-embedded.version>
<glassfish-embedded-all.version>3.1.2</glassfish-embedded-all.version>
<arquillian-glassfish-embedded-3.1.version>1.0.0.CR4</arquillian-glassfish-embedded-3.1.version>
<javax.ejb-api.version>3.2</javax.ejb-api.version>
<springframework.version>5.2.3.RELEASE</springframework.version>
<activemq.broker.version>5.10.2</activemq.broker.version>
<activemq.junit.version>5.13.1</activemq.junit.version>
</properties>
</project>

63
spring-ejb/ejb-beans/src/main/java/com/baeldung/ejb/spring/comparison/ejb/messagedriven/RecieverMDB.java Normal file
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@ -0,0 +1,63 @@
package com.baeldung.ejb.spring.comparison.ejb.messagedriven;
import javax.annotation.Resource;
import javax.ejb.ActivationConfigProperty;
import javax.ejb.MessageDriven;
import javax.jms.Connection;
import javax.jms.ConnectionFactory;
import javax.jms.DeliveryMode;
import javax.jms.JMSException;
import javax.jms.Message;
import javax.jms.MessageListener;
import javax.jms.MessageProducer;
import javax.jms.Queue;
import javax.jms.Session;
import javax.jms.TextMessage;
@MessageDriven(activationConfig = { @ActivationConfigProperty(propertyName = "destination", propertyValue = "myQueue"), @ActivationConfigProperty(propertyName = "destinationType", propertyValue = "javax.jms.Queue") })
public class RecieverMDB implements MessageListener {
@Resource
private ConnectionFactory connectionFactory;
@Resource(name = "ackQueue")
private Queue ackQueue;
public void onMessage(Message message) {
try {
TextMessage textMessage = (TextMessage) message;
String producerPing = textMessage.getText();
if (producerPing.equals("marco")) {
acknowledge("polo");
}
} catch (JMSException e) {
throw new IllegalStateException(e);
}
}
private void acknowledge(String text) throws JMSException {
Connection connection = null;
Session session = null;
try {
connection = connectionFactory.createConnection();
connection.start();
session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
MessageProducer ackSender = session.createProducer(ackQueue);
ackSender.setDeliveryMode(DeliveryMode.NON_PERSISTENT);
TextMessage message = session.createTextMessage(text);
ackSender.send(message);
} finally {
session.close();
connection.close();
}
}
}

14
spring-ejb/ejb-beans/src/main/java/com/baeldung/ejb/spring/comparison/ejb/singleton/CounterEJB.java Normal file
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@ -0,0 +1,14 @@
package com.baeldung.ejb.spring.comparison.ejb.singleton;
import javax.ejb.Singleton;
@Singleton
public class CounterEJB implements CounterEJBRemote {
private int count = 1;
public int count() {
return count++;
}
}

8
spring-ejb/ejb-beans/src/main/java/com/baeldung/ejb/spring/comparison/ejb/singleton/CounterEJBRemote.java Normal file
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@ -0,0 +1,8 @@
package com.baeldung.ejb.spring.comparison.ejb.singleton;
import javax.ejb.Remote;
@Remote
public interface CounterEJBRemote {
int count();
}

25
spring-ejb/ejb-beans/src/main/java/com/baeldung/ejb/spring/comparison/ejb/stateful/ShoppingCartEJB.java Normal file
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@ -0,0 +1,25 @@
package com.baeldung.ejb.spring.comparison.ejb.stateful;
import java.util.ArrayList;
import java.util.List;
import javax.ejb.Stateful;
@Stateful
public class ShoppingCartEJB implements ShoppingCartEJBRemote {
private List<String> shoppingCart;
public ShoppingCartEJB() {
shoppingCart = new ArrayList<String>();
}
public void addItem(String item) {
shoppingCart.add(item);
}
public List<String> getItems() {
return shoppingCart;
}
}

13
spring-ejb/ejb-beans/src/main/java/com/baeldung/ejb/spring/comparison/ejb/stateful/ShoppingCartEJBRemote.java Normal file
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@ -0,0 +1,13 @@
package com.baeldung.ejb.spring.comparison.ejb.stateful;
import java.util.List;
import javax.ejb.Remote;
@Remote
public interface ShoppingCartEJBRemote {
void addItem(String item);
List<String> getItems();
}

25
spring-ejb/ejb-beans/src/main/java/com/baeldung/ejb/spring/comparison/ejb/stateless/FinderEJB.java Normal file
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@ -0,0 +1,25 @@
package com.baeldung.ejb.spring.comparison.ejb.stateless;
import java.util.HashMap;
import java.util.Map;
import javax.ejb.Stateless;
@Stateless
public class FinderEJB implements FinderEJBRemote {
private Map<String, String> alphabet;
public FinderEJB() {
alphabet = new HashMap<String, String>();
alphabet.put("A", "Apple");
alphabet.put("B", "Ball");
alphabet.put("C", "Cat");
alphabet.put("D", "Dog");
}
public String search(String keyword) {
return alphabet.get(keyword);
}
}

9
spring-ejb/ejb-beans/src/main/java/com/baeldung/ejb/spring/comparison/ejb/stateless/FinderEJBRemote.java Normal file
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@ -0,0 +1,9 @@
package com.baeldung.ejb.spring.comparison.ejb.stateless;
import javax.ejb.Remote;
@Remote
public interface FinderEJBRemote {
String search(String keyword);
}

36
spring-ejb/ejb-beans/src/main/java/com/baeldung/ejb/spring/comparison/spring/config/ApplicationConfig.java Normal file
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@ -0,0 +1,36 @@
package com.baeldung.ejb.spring.comparison.spring.config;
import javax.jms.ConnectionFactory;
import org.apache.activemq.ActiveMQConnectionFactory;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.jms.annotation.EnableJms;
import org.springframework.jms.config.DefaultJmsListenerContainerFactory;
import org.springframework.jms.core.JmsTemplate;
@Configuration
@ComponentScan(basePackages = "com.baeldung.ejb.spring.comparison.spring")
@EnableJms
public class ApplicationConfig {
@Bean
public DefaultJmsListenerContainerFactory jmsListenerContainerFactory() {
DefaultJmsListenerContainerFactory factory = new DefaultJmsListenerContainerFactory();
factory.setConnectionFactory(connectionFactory());
return factory;
}
@Bean
public ConnectionFactory connectionFactory() {
return new ActiveMQConnectionFactory("tcp://localhost:61616");
}
@Bean
public JmsTemplate jmsTemplate() {
JmsTemplate template = new JmsTemplate(connectionFactory());
template.setConnectionFactory(connectionFactory());
return template;
}
}

19
spring-ejb/ejb-beans/src/main/java/com/baeldung/ejb/spring/comparison/spring/messagedriven/Producer.java Normal file
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@ -0,0 +1,19 @@
package com.baeldung.ejb.spring.comparison.spring.messagedriven;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.jms.core.JmsTemplate;
import org.springframework.stereotype.Component;
@Component
public class Producer {
@Autowired
private JmsTemplate jmsTemplate;
public void sendMessageToDefaultDestination(final String message) {
jmsTemplate.convertAndSend("myQueue", message);
}
public String receiveAck() {
return (String) jmsTemplate.receiveAndConvert("ackQueue");
}
}

22
spring-ejb/ejb-beans/src/main/java/com/baeldung/ejb/spring/comparison/spring/messagedriven/Receiver.java Normal file
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@ -0,0 +1,22 @@
package com.baeldung.ejb.spring.comparison.spring.messagedriven;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.jms.annotation.JmsListener;
import org.springframework.jms.core.JmsTemplate;
import org.springframework.stereotype.Component;
@Component
public class Receiver {
@Autowired
private JmsTemplate jmsTemplate;
@JmsListener(destination = "myQueue")
public void receiveMessage(String msg) {
sendAck();
}
private void sendAck() {
jmsTemplate.convertAndSend("ackQueue", "polo");
}
}

12
spring-ejb/ejb-beans/src/main/java/com/baeldung/ejb/spring/comparison/spring/singleton/CounterBean.java Normal file
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@ -0,0 +1,12 @@
package com.baeldung.ejb.spring.comparison.spring.singleton;
import org.springframework.stereotype.Component;
@Component
public class CounterBean {
private int count = 1;
public int count() {
return count++;
}
}

28
spring-ejb/ejb-beans/src/main/java/com/baeldung/ejb/spring/comparison/spring/stateful/ShoppingCartBean.java Normal file
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@ -0,0 +1,28 @@
package com.baeldung.ejb.spring.comparison.spring.stateful;
import java.util.ArrayList;
import java.util.List;
import org.springframework.beans.factory.config.ConfigurableBeanFactory;
import org.springframework.context.annotation.Scope;
import org.springframework.stereotype.Component;
@Component
@Scope(value = ConfigurableBeanFactory.SCOPE_PROTOTYPE)
public class ShoppingCartBean {
private List<String> shoppingCart;
public ShoppingCartBean() {
shoppingCart = new ArrayList<String>();
}
public void addItem(String item) {
shoppingCart.add(item);
}
public List<String> getItems() {
return shoppingCart;
}
}

142
spring-ejb/ejb-beans/src/test/java/com/baeldung/ejb/spring/comparison/ejb/EJBUnitTest.java Normal file
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@ -0,0 +1,142 @@
package com.baeldung.ejb.spring.comparison.ejb;
import static org.hamcrest.CoreMatchers.is;
import static org.hamcrest.CoreMatchers.not;
import static org.junit.Assert.assertThat;
import static org.junit.jupiter.api.Assertions.assertEquals;
import javax.annotation.Resource;
import javax.ejb.EJB;
import javax.ejb.embeddable.EJBContainer;
import javax.jms.Connection;
import javax.jms.ConnectionFactory;
import javax.jms.JMSException;
import javax.jms.MessageConsumer;
import javax.jms.MessageProducer;
import javax.jms.Queue;
import javax.jms.Session;
import javax.jms.TextMessage;
import javax.naming.Context;
import javax.naming.NamingException;
import org.junit.After;
import org.junit.AfterClass;
import org.junit.Before;
import org.junit.BeforeClass;
import org.junit.Test;
import com.baeldung.ejb.spring.comparison.ejb.singleton.CounterEJBRemote;
import com.baeldung.ejb.spring.comparison.ejb.stateful.ShoppingCartEJBRemote;
import com.baeldung.ejb.spring.comparison.ejb.stateless.FinderEJBRemote;
public class EJBUnitTest {
private static EJBContainer ejbContainer = null;
private static Context context = null;
@Resource
private ConnectionFactory connectionFactory;
@EJB
private FinderEJBRemote alphabetFinder;
@Resource(name = "myQueue")
private Queue myQueue;
@Resource(name = "ackQueue")
private Queue ackQueue;
@BeforeClass
public static void start() throws NamingException {
ejbContainer = EJBContainer.createEJBContainer();
}
@Before
public void initializeContext() throws NamingException {
context = ejbContainer.getContext();
context.bind("inject", this);
}
@Test
public void givenSingletonBean_whenCounterInvoked_thenCountIsIncremented() throws NamingException {
int count = 0;
CounterEJBRemote counterEJB = (CounterEJBRemote) context.lookup("java:global/ejb-beans/CounterEJB");
for (int i = 0; i < 10; i++)
count = counterEJB.count();
assertThat(count, is(not(1)));
}
@Test
public void givenSingletonBean_whenCounterInvokedAgain_thenCountIsIncremented() throws NamingException {
CounterEJBRemote counterEJB = (CounterEJBRemote) context.lookup("java:global/ejb-beans/CounterEJB");
int count = 0;
for (int i = 0; i < 10; i++)
count = counterEJB.count();
assertThat(count, is(not(1)));
}
@Test
public void givenStatefulBean_whenBathingCartWithThreeItemsAdded_thenItemsSizeIsThree() throws NamingException {
ShoppingCartEJBRemote bathingCart = (ShoppingCartEJBRemote) context.lookup("java:global/ejb-beans/ShoppingCartEJB");
bathingCart.addItem("soap");
bathingCart.addItem("shampoo");
bathingCart.addItem("oil");
assertEquals(3, bathingCart.getItems()
.size());
}
@Test
public void givenStatefulBean_whenFruitCartWithTwoItemsAdded_thenItemsSizeIsTwo() throws NamingException {
ShoppingCartEJBRemote fruitCart = (ShoppingCartEJBRemote) context.lookup("java:global/ejb-beans/ShoppingCartEJB");
fruitCart.addItem("apples");
fruitCart.addItem("oranges");
assertEquals(2, fruitCart.getItems()
.size());
}
@Test
public void givenStatelessBean_whenSearchForA_thenApple() throws NamingException {
assertEquals("Apple", alphabetFinder.search("A"));
}
@Test
public void givenMDB_whenMessageSent_thenAcknowledgementReceived() throws InterruptedException, JMSException, NamingException {
Connection connection = connectionFactory.createConnection();
connection.start();
Session session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
MessageProducer producer = session.createProducer(myQueue);
producer.send(session.createTextMessage("marco"));
MessageConsumer response = session.createConsumer(ackQueue);
assertEquals("polo", ((TextMessage) response.receive(1000)).getText());
}
@After
public void reset() throws NamingException {
context.unbind("inject");
}
@AfterClass
public static void checkTotalCountAndcloseContext() throws NamingException {
CounterEJBRemote counterEJB = (CounterEJBRemote) context.lookup("java:global/ejb-beans/CounterEJB");
assertEquals(21, counterEJB.count());
context.close();
ejbContainer.close();
}
}

108
spring-ejb/ejb-beans/src/test/java/com/baeldung/ejb/spring/comparison/spring/SpringUnitTest.java Normal file
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@ -0,0 +1,108 @@
package com.baeldung.ejb.spring.comparison.spring;
import static org.hamcrest.CoreMatchers.is;
import static org.hamcrest.CoreMatchers.not;
import static org.junit.Assert.assertThat;
import static org.junit.jupiter.api.Assertions.assertEquals;
import javax.naming.NamingException;
import org.apache.activemq.junit.EmbeddedActiveMQBroker;
import org.junit.AfterClass;
import org.junit.Assert;
import org.junit.BeforeClass;
import org.junit.ClassRule;
import org.junit.Test;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;
import com.baeldung.ejb.spring.comparison.spring.config.ApplicationConfig;
import com.baeldung.ejb.spring.comparison.spring.messagedriven.Producer;
import com.baeldung.ejb.spring.comparison.spring.singleton.CounterBean;
import com.baeldung.ejb.spring.comparison.spring.stateful.ShoppingCartBean;
public class SpringUnitTest {
private static AnnotationConfigApplicationContext context = null;
@ClassRule
public static EmbeddedActiveMQBroker broker = new EmbeddedActiveMQBroker() {
@Override
protected void configure() {
this.getBrokerService()
.setUseJmx(true);
try {
this.getBrokerService()
.addConnector("tcp://localhost:61616");
} catch (Exception e) {
Assert.fail(e.getMessage());
}
}
};
@BeforeClass
public static void init() {
context = new AnnotationConfigApplicationContext(ApplicationConfig.class);
}
@Test
public void whenCounterInvoked_thenCountIsIncremented() throws NamingException {
CounterBean counterBean = context.getBean(CounterBean.class);
int count = 0;
for (int i = 0; i < 10; i++)
count = counterBean.count();
assertThat(count, is(not(1)));
}
@Test
public void whenCounterInvokedAgain_thenCountIsIncremented() throws NamingException {
CounterBean counterBean = context.getBean(CounterBean.class);
int count = 0;
for (int i = 0; i < 10; i++)
count = counterBean.count();
assertThat(count, is(not(1)));
}
@Test
public void whenBathingCartWithThreeItemsAdded_thenItemsSizeIsThree() throws NamingException {
ShoppingCartBean bathingCart = context.getBean(ShoppingCartBean.class);
bathingCart.addItem("soap");
bathingCart.addItem("shampoo");
bathingCart.addItem("oil");
assertEquals(3, bathingCart.getItems()
.size());
}
@Test
public void whenFruitCartWithTwoItemsAdded_thenItemsSizeIsTwo() throws NamingException {
ShoppingCartBean fruitCart = context.getBean(ShoppingCartBean.class);
fruitCart.addItem("apples");
fruitCart.addItem("oranges");
assertEquals(2, fruitCart.getItems()
.size());
}
@Test
public void givenJMSBean_whenMessageSent_thenAcknowledgementReceived() throws NamingException {
Producer producer = context.getBean(Producer.class);
producer.sendMessageToDefaultDestination("marco");
assertEquals("polo", producer.receiveAck());
}
@AfterClass
public static void checkTotalCountAndcloseContext() throws NamingException {
CounterBean counterBean = context.getBean(CounterBean.class);
int count = counterBean.count();
assertEquals(21, count);
context.close();
}
}