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ActiveMQ example source code file (RawRollbackTests.java)

This example ActiveMQ source code file (RawRollbackTests.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - ActiveMQ tags/keywords

activemqconnectionfactory, activemqqueue, brokerservice, connection, connection, exception, exception, list, list, messageconsumer, messageproducer, session, string, string, util

The ActiveMQ RawRollbackTests.java source code

/**
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.activemq.bugs;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;

import java.util.ArrayList;
import java.util.List;

import javax.jms.Connection;
import javax.jms.ConnectionFactory;
import javax.jms.Destination;
import javax.jms.Message;
import javax.jms.MessageConsumer;
import javax.jms.MessageProducer;
import javax.jms.Session;
import javax.jms.TextMessage;

import org.apache.activemq.ActiveMQConnectionFactory;
import org.apache.activemq.broker.BrokerService;
import org.apache.activemq.command.ActiveMQQueue;
import org.junit.After;
import org.junit.AfterClass;
import org.junit.Before;
import org.junit.BeforeClass;
import org.junit.Test;

public class RawRollbackTests {
	
	private static ConnectionFactory connectionFactory;
	private static Destination queue;
	private static BrokerService broker;

	@BeforeClass
	public static void clean() throws Exception {
		broker = new BrokerService();
		broker.setDeleteAllMessagesOnStartup(true);
		broker.setUseJmx(true);
		broker.start();
		ActiveMQConnectionFactory connectionFactory = new ActiveMQConnectionFactory();
		connectionFactory.setBrokerURL("vm://localhost?async=false&waitForStart=5000&jms.prefetchPolicy.all=0");
		RawRollbackTests.connectionFactory = connectionFactory;
		queue = new ActiveMQQueue("queue");
	}

	@AfterClass
	public static void close() throws Exception {
		broker.stop();
	}

	@Before
	public void clearData() throws Exception {
		getMessages(false); // drain queue
		convertAndSend("foo");
		convertAndSend("bar");
	}


	@After
	public void checkPostConditions() throws Exception {

		Thread.sleep(1000L);
		List<String> list = getMessages(false);
		assertEquals(2, list.size());

	}

	@Test
	public void testReceiveMessages() throws Exception {

		List<String> list = getMessages(true);
		assertEquals(2, list.size());
		assertTrue(list.contains("foo"));

	}
	
	private void convertAndSend(String msg) throws Exception {
		Connection connection = connectionFactory.createConnection();
		connection.start();
		Session session = connection.createSession(true, Session.AUTO_ACKNOWLEDGE);
		MessageProducer producer = session.createProducer(queue);
		producer.send(session.createTextMessage(msg));
		producer.close();
		session.commit();
		session.close();
		connection.close();
	}

	private List<String> getMessages(boolean rollback) throws Exception {
		Connection connection = connectionFactory.createConnection();
		connection.start();
		Session session = connection.createSession(true, Session.AUTO_ACKNOWLEDGE);
		String next = "";
		List<String> msgs = new ArrayList();
		while (next != null) {
			next = (String) receiveAndConvert(session);
			if (next != null)
				msgs.add(next);
		}
		if (rollback) {
			session.rollback();
		} else {
			session.commit();
		}
		session.close();
		connection.close();
		return msgs;
	}

	private String receiveAndConvert(Session session) throws Exception {
		MessageConsumer consumer = session.createConsumer(queue);
		Message message = consumer.receive(100L);
		consumer.close();
		if (message==null) {
			return null;
		}
		return ((TextMessage)message).getText();
	}
}

Other ActiveMQ examples (source code examples)

Here is a short list of links related to this ActiveMQ RawRollbackTests.java source code file:

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