/**
* 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.usecases;
import junit.framework.TestCase;
import org.apache.activemq.ActiveMQConnectionFactory;
import org.apache.activemq.advisory.AdvisorySupport;
import org.apache.activemq.broker.BrokerService;
import org.apache.activemq.broker.region.policy.PolicyEntry;
import org.apache.activemq.broker.region.policy.PolicyMap;
import org.apache.activemq.command.ActiveMQTopic;
import org.junit.Assert;
import javax.jms.Connection;
import javax.jms.Message;
import javax.jms.MessageConsumer;
import javax.jms.MessageProducer;
import javax.jms.Session;
/**
* Checks to see if "slow consumer advisory messages" are generated when
* small number of messages (2) are published to a topic which has a subscriber
* with a prefetch of one set.
*
*/
public class TopicSubscriptionSlowConsumerTest extends TestCase {
private static final String TOPIC_NAME = "slow.consumer";
Connection connection;
private Session session;
private ActiveMQTopic destination;
private MessageProducer producer;
private MessageConsumer consumer;
private BrokerService brokerService;
public void setUp() throws Exception {
brokerService = createBroker();
ActiveMQConnectionFactory activeMQConnectionFactory = new ActiveMQConnectionFactory("vm://localhost");
activeMQConnectionFactory.setWatchTopicAdvisories(true);
connection = activeMQConnectionFactory.createConnection();
session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
destination = new ActiveMQTopic(TOPIC_NAME);
producer = session.createProducer(destination);
connection.start();
}
public void testPrefetchValueOne() throws Exception{
ActiveMQTopic consumerDestination = new ActiveMQTopic(TOPIC_NAME+"?consumer.prefetchSize=1");
consumer = session.createConsumer(consumerDestination);
//add a consumer to the slow consumer advisory topic.
ActiveMQTopic slowConsumerAdvisoryTopic = AdvisorySupport.getSlowConsumerAdvisoryTopic(destination);
MessageConsumer slowConsumerAdvisory = session.createConsumer(slowConsumerAdvisoryTopic);
//publish 2 messages
Message txtMessage = session.createTextMessage("Sample Text Message");
for(int i= 0; i<2; i++){
producer.send(txtMessage);
}
//consume 2 messages
for(int i= 0; i<2; i++){
Message receivedMsg = consumer.receive(100);
Assert.assertNotNull("received msg "+i+" should not be null",receivedMsg);
}
//check for "slow consumer" advisory message
Message slowAdvisoryMessage = slowConsumerAdvisory.receive(100);
Assert.assertNull( "should not have received a slow consumer advisory message",slowAdvisoryMessage);
}
public void tearDown() throws Exception {
consumer.close();
producer.close();
session.close();
connection.close();
brokerService.stop();
}
//helper method to create a broker with slow consumer advisory turned on
private BrokerService createBroker() throws Exception {
BrokerService broker = new BrokerService();
broker.setBrokerName("localhost");
broker.setUseJmx(true);
broker.setDeleteAllMessagesOnStartup(true);
broker.addConnector("vm://localhost");
PolicyMap policyMap = new PolicyMap();
PolicyEntry defaultEntry = new PolicyEntry();
defaultEntry.setAdvisoryForSlowConsumers(true);
policyMap.setDefaultEntry(defaultEntry);
broker.setDestinationPolicy(policyMap);
broker.start();
broker.waitUntilStarted();
return broker;
}
}