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ActiveMQ example source code file (RedeliveryPolicyTest.java)

This example ActiveMQ source code file (RedeliveryPolicyTest.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

activemqqueue, activemqqueue, exception, jmstestsupport, messageconsumer, messageconsumer, messageproducer, messageproducer, redeliverypolicy, redeliverypolicytest, session, test, textmessage, textmessage

The ActiveMQ RedeliveryPolicyTest.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;

import javax.jms.MessageConsumer;
import javax.jms.MessageProducer;
import javax.jms.Session;
import javax.jms.TextMessage;

import junit.framework.Test;

import org.apache.activemq.command.ActiveMQQueue;

/**
 * Test cases used to test the JMS message exclusive consumers.
 *
 *
 */
public class RedeliveryPolicyTest extends JmsTestSupport {

    public static Test suite() {
        return suite(RedeliveryPolicyTest.class);
    }

    public static void main(String[] args) {
        junit.textui.TestRunner.run(suite());
    }

    /**
     * @throws Exception
     */
    public void testExponentialRedeliveryPolicyDelaysDeliveryOnRollback() throws Exception {

        // Receive a message with the JMS API
        RedeliveryPolicy policy = connection.getRedeliveryPolicy();
        policy.setInitialRedeliveryDelay(0);
        policy.setRedeliveryDelay(500);
        policy.setBackOffMultiplier((short) 2);
        policy.setUseExponentialBackOff(true);

        connection.start();
        Session session = connection.createSession(true, Session.AUTO_ACKNOWLEDGE);
        ActiveMQQueue destination = new ActiveMQQueue(getName());
        MessageProducer producer = session.createProducer(destination);

        MessageConsumer consumer = session.createConsumer(destination);

        // Send the messages
        producer.send(session.createTextMessage("1st"));
        producer.send(session.createTextMessage("2nd"));
        session.commit();

        TextMessage m;
        m = (TextMessage)consumer.receive(1000);
        assertNotNull(m);
        assertEquals("1st", m.getText());
        session.rollback();

        // No delay on first rollback..
        m = (TextMessage)consumer.receive(100);
        assertNotNull(m);
        session.rollback();

        // Show subsequent re-delivery delay is incrementing.
        m = (TextMessage)consumer.receive(100);
        assertNull(m);

        m = (TextMessage)consumer.receive(700);
        assertNotNull(m);
        assertEquals("1st", m.getText());
        session.rollback();

        // Show re-delivery delay is incrementing exponentially
        m = (TextMessage)consumer.receive(100);
        assertNull(m);
        m = (TextMessage)consumer.receive(500);
        assertNull(m);
        m = (TextMessage)consumer.receive(700);
        assertNotNull(m);
        assertEquals("1st", m.getText());

    }


    /**
     * @throws Exception
     */
    public void testNornalRedeliveryPolicyDelaysDeliveryOnRollback() throws Exception {

        // Receive a message with the JMS API
        RedeliveryPolicy policy = connection.getRedeliveryPolicy();
        policy.setInitialRedeliveryDelay(0);
        policy.setRedeliveryDelay(500);

        connection.start();
        Session session = connection.createSession(true, Session.AUTO_ACKNOWLEDGE);
        ActiveMQQueue destination = new ActiveMQQueue(getName());
        MessageProducer producer = session.createProducer(destination);

        MessageConsumer consumer = session.createConsumer(destination);

        // Send the messages
        producer.send(session.createTextMessage("1st"));
        producer.send(session.createTextMessage("2nd"));
        session.commit();

        TextMessage m;
        m = (TextMessage)consumer.receive(1000);
        assertNotNull(m);
        assertEquals("1st", m.getText());
        session.rollback();

        // No delay on first rollback..
        m = (TextMessage)consumer.receive(100);
        assertNotNull(m);
        session.rollback();

        // Show subsequent re-delivery delay is incrementing.
        m = (TextMessage)consumer.receive(100);
        assertNull(m);
        m = (TextMessage)consumer.receive(700);
        assertNotNull(m);
        assertEquals("1st", m.getText());
        session.rollback();

        // The message gets redelivered after 500 ms every time since
        // we are not using exponential backoff.
        m = (TextMessage)consumer.receive(100);
        assertNull(m);
        m = (TextMessage)consumer.receive(700);
        assertNotNull(m);
        assertEquals("1st", m.getText());

    }

    /**
     * @throws Exception
     */
    public void testDLQHandling() throws Exception {

        // Receive a message with the JMS API
        RedeliveryPolicy policy = connection.getRedeliveryPolicy();
        policy.setInitialRedeliveryDelay(100);
        policy.setUseExponentialBackOff(false);
        policy.setMaximumRedeliveries(2);

        connection.start();
        Session session = connection.createSession(true, Session.AUTO_ACKNOWLEDGE);
        ActiveMQQueue destination = new ActiveMQQueue("TEST");
        MessageProducer producer = session.createProducer(destination);

        MessageConsumer consumer = session.createConsumer(destination);
        MessageConsumer dlqConsumer = session.createConsumer(new ActiveMQQueue("ActiveMQ.DLQ"));

        // Send the messages
        producer.send(session.createTextMessage("1st"));
        producer.send(session.createTextMessage("2nd"));
        session.commit();

        TextMessage m;
        m = (TextMessage)consumer.receive(1000);
        assertNotNull(m);
        assertEquals("1st", m.getText());
        session.rollback();

        m = (TextMessage)consumer.receive(1000);
        assertNotNull(m);
        assertEquals("1st", m.getText());
        session.rollback();

        m = (TextMessage)consumer.receive(1000);
        assertNotNull(m);
        assertEquals("1st", m.getText());
        session.rollback();

        // The last rollback should cause the 1st message to get sent to the DLQ
        m = (TextMessage)consumer.receive(1000);
        assertNotNull(m);
        assertEquals("2nd", m.getText());
        session.commit();

        // We should be able to get the message off the DLQ now.
        m = (TextMessage)dlqConsumer.receive(1000);
        assertNotNull(m);
        assertEquals("1st", m.getText());
        session.commit();

    }


    /**
     * @throws Exception
     */
    public void testInfiniteMaximumNumberOfRedeliveries() throws Exception {

        // Receive a message with the JMS API
        RedeliveryPolicy policy = connection.getRedeliveryPolicy();
        policy.setInitialRedeliveryDelay(100);
        policy.setUseExponentialBackOff(false);
       //  let's set the maximum redeliveries to no maximum (ie. infinite)
        policy.setMaximumRedeliveries(-1);


        connection.start();
        Session session = connection.createSession(true, Session.AUTO_ACKNOWLEDGE);
        ActiveMQQueue destination = new ActiveMQQueue("TEST");
        MessageProducer producer = session.createProducer(destination);

        MessageConsumer consumer = session.createConsumer(destination);

        // Send the messages
        producer.send(session.createTextMessage("1st"));
        producer.send(session.createTextMessage("2nd"));
        session.commit();

        TextMessage m;

        m = (TextMessage)consumer.receive(1000);
        assertNotNull(m);
        assertEquals("1st", m.getText());
        session.rollback();

        //we should be able to get the 1st message redelivered until a session.commit is called
        m = (TextMessage)consumer.receive(1000);
        assertNotNull(m);
        assertEquals("1st", m.getText());
        session.rollback();

        m = (TextMessage)consumer.receive(1000);
        assertNotNull(m);
        assertEquals("1st", m.getText());
        session.rollback();

        m = (TextMessage)consumer.receive(1000);
        assertNotNull(m);
        assertEquals("1st", m.getText());
        session.rollback();

        m = (TextMessage)consumer.receive(1000);
        assertNotNull(m);
        assertEquals("1st", m.getText());
        session.rollback();

        m = (TextMessage)consumer.receive(1000);
        assertNotNull(m);
        assertEquals("1st", m.getText());
        session.commit();

        m = (TextMessage)consumer.receive(1000);
        assertNotNull(m);
        assertEquals("2nd", m.getText());
        session.commit();

    }

    /**
     * @throws Exception
     */
    public void testMaximumRedeliveryDelay() throws Exception {

        // Receive a message with the JMS API
        RedeliveryPolicy policy = connection.getRedeliveryPolicy();
        policy.setInitialRedeliveryDelay(10);
        policy.setUseExponentialBackOff(true);
        policy.setMaximumRedeliveries(-1);
        policy.setRedeliveryDelay(50);
        policy.setMaximumRedeliveryDelay(1000);
        policy.setBackOffMultiplier((short) 2);
        policy.setUseExponentialBackOff(true);

        connection.start();
        Session session = connection.createSession(true, Session.AUTO_ACKNOWLEDGE);
        ActiveMQQueue destination = new ActiveMQQueue("TEST");
        MessageProducer producer = session.createProducer(destination);

        MessageConsumer consumer = session.createConsumer(destination);

        // Send the messages
        producer.send(session.createTextMessage("1st"));
        producer.send(session.createTextMessage("2nd"));
        session.commit();

        TextMessage m;

        for(int i = 0; i < 10; ++i) {
            // we should be able to get the 1st message redelivered until a session.commit is called
            m = (TextMessage)consumer.receive(2000);
            assertNotNull(m);
            assertEquals("1st", m.getText());
            session.rollback();
        }

        m = (TextMessage)consumer.receive(2000);
        assertNotNull(m);
        assertEquals("1st", m.getText());
        session.commit();

        m = (TextMessage)consumer.receive(2000);
        assertNotNull(m);
        assertEquals("2nd", m.getText());
        session.commit();

        assertTrue(policy.getNextRedeliveryDelay(Long.MAX_VALUE) == 1000 );
    }

    /**
     * @throws Exception
     */
    public void testZeroMaximumNumberOfRedeliveries() throws Exception {

        // Receive a message with the JMS API
        RedeliveryPolicy policy = connection.getRedeliveryPolicy();
        policy.setInitialRedeliveryDelay(100);
        policy.setUseExponentialBackOff(false);
        //let's set the maximum redeliveries to 0
        policy.setMaximumRedeliveries(0);

        connection.start();
        Session session = connection.createSession(true, Session.AUTO_ACKNOWLEDGE);
        ActiveMQQueue destination = new ActiveMQQueue("TEST");
        MessageProducer producer = session.createProducer(destination);

        MessageConsumer consumer = session.createConsumer(destination);

        // Send the messages
        producer.send(session.createTextMessage("1st"));
        producer.send(session.createTextMessage("2nd"));
        session.commit();

        TextMessage m;
        m = (TextMessage)consumer.receive(1000);
        assertNotNull(m);
        assertEquals("1st", m.getText());
        session.rollback();

        //the 1st  message should not be redelivered since maximumRedeliveries is set to 0
        m = (TextMessage)consumer.receive(1000);
        assertNotNull(m);
        assertEquals("2nd", m.getText());
        session.commit();



    }


    public void testInitialRedeliveryDelayZero() throws Exception {

        // Receive a message with the JMS API
        RedeliveryPolicy policy = connection.getRedeliveryPolicy();
        policy.setInitialRedeliveryDelay(0);
        policy.setUseExponentialBackOff(false);
        policy.setMaximumRedeliveries(1);

        connection.start();
        Session session = connection.createSession(true, Session.AUTO_ACKNOWLEDGE);
        ActiveMQQueue destination = new ActiveMQQueue("TEST");
        MessageProducer producer = session.createProducer(destination);

        MessageConsumer consumer = session.createConsumer(destination);

        // Send the messages
        producer.send(session.createTextMessage("1st"));
        producer.send(session.createTextMessage("2nd"));
        session.commit();

        TextMessage m;
        m = (TextMessage)consumer.receive(100);
        assertNotNull(m);
        assertEquals("1st", m.getText());
        session.rollback();

        m = (TextMessage)consumer.receive(100);
        assertNotNull(m);
        assertEquals("1st", m.getText());

        m = (TextMessage)consumer.receive(100);
        assertNotNull(m);
        assertEquals("2nd", m.getText());
        session.commit();

        session.commit();
    }


    public void testInitialRedeliveryDelayOne() throws Exception {

        // Receive a message with the JMS API
        RedeliveryPolicy policy = connection.getRedeliveryPolicy();
        policy.setInitialRedeliveryDelay(1000);
        policy.setUseExponentialBackOff(false);
        policy.setMaximumRedeliveries(1);

        connection.start();
        Session session = connection.createSession(true, Session.AUTO_ACKNOWLEDGE);
        ActiveMQQueue destination = new ActiveMQQueue("TEST");
        MessageProducer producer = session.createProducer(destination);

        MessageConsumer consumer = session.createConsumer(destination);

        // Send the messages
        producer.send(session.createTextMessage("1st"));
        producer.send(session.createTextMessage("2nd"));
        session.commit();

        TextMessage m;
        m = (TextMessage)consumer.receive(100);
        assertNotNull(m);
        assertEquals("1st", m.getText());
        session.rollback();

        m = (TextMessage)consumer.receive(100);
        assertNull(m);

        m = (TextMessage)consumer.receive(2000);
        assertNotNull(m);
        assertEquals("1st", m.getText());

        m = (TextMessage)consumer.receive(100);
        assertNotNull(m);
        assertEquals("2nd", m.getText());
        session.commit();
    }

    public void testRedeliveryDelayOne() throws Exception {

        // Receive a message with the JMS API
        RedeliveryPolicy policy = connection.getRedeliveryPolicy();
        policy.setInitialRedeliveryDelay(0);
        policy.setRedeliveryDelay(1000);
        policy.setUseExponentialBackOff(false);
        policy.setMaximumRedeliveries(2);

        connection.start();
        Session session = connection.createSession(true, Session.AUTO_ACKNOWLEDGE);
        ActiveMQQueue destination = new ActiveMQQueue("TEST");
        MessageProducer producer = session.createProducer(destination);

        MessageConsumer consumer = session.createConsumer(destination);

        // Send the messages
        producer.send(session.createTextMessage("1st"));
        producer.send(session.createTextMessage("2nd"));
        session.commit();

        TextMessage m;
        m = (TextMessage)consumer.receive(100);
        assertNotNull(m);
        assertEquals("1st", m.getText());
        session.rollback();

        m = (TextMessage)consumer.receive(100);
        assertNotNull("first immediate redelivery", m);
        session.rollback();

        m = (TextMessage)consumer.receive(100);
        assertNull("second delivery delayed: " + m, m);

        m = (TextMessage)consumer.receive(2000);
        assertNotNull(m);
        assertEquals("1st", m.getText());

        m = (TextMessage)consumer.receive(100);
        assertNotNull(m);
        assertEquals("2nd", m.getText());
        session.commit();
    }
}

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