activemq-users mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From ncsridhar <...@uc4.com>
Subject Topic messages lost even when they are persistent - help!
Date Thu, 02 Dec 2010 18:00:12 GMT

Hi,

I am a new user trying to use activemq for my ESB. I am trying to use the
sample programs TopicPublisher and TopicLIstener. I am posting messages to
ActiveMQ topics  called "topictest.messages" , "topictest.control". I am
marking them as persistent in the following ways:

>>>>>>>>>>
        ActiveMQConnectionFactory factory = new
ActiveMQConnectionFactory(url);
        connection = factory.createConnection();
        session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
        //session = connection.createSession(false,
Session.SESSION_TRANSACTED);
        topic = session.createTopic("topictest.messages");
        control = session.createTopic("topictest.control");
        
        publisher = session.createProducer(topic);
        publisher.setDeliveryMode(DeliveryMode.PERSISTENT);
>>>>>>>>>> and also when sending the actual message itself >>>>>>>>>
       for (int i = 0; i < messages; i++) {
            publisher.send(msg, DeliveryMode.PERSISTENT, 3, 1);
            if ((i + 1) % 1000 == 0) {
                System.out.println("Sent " + (i + 1) + " messages");
            }
        }
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>

I have created a durable subscriber on the topictest.messages topic. When I
run the publisher program it posts the messages fine and I can verify that,
but they dont survive a restart. I cant see what I am doing wrong. The odd
behavior is that when I put messages on my queues, they survive restarts by
default, but same is not true for the topics. Below is my activemq.xml:

<beans
  xmlns="http://www.springframework.org/schema/beans"
  xmlns:amq="http://activemq.apache.org/schema/core"
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-2.0.xsd
  http://activemq.apache.org/schema/core
http://activemq.apache.org/schema/core/activemq-core.xsd">

    <!-- Allows us to use system properties as variables in this
configuration file -->
    <bean
class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
        <property name="locations">
            <value>file:${activemq.base}/conf/credentials.properties</value>
        </property>      
    </bean>

    <!-- 
        The <broker> element is used to configure the ActiveMQ broker. 
    -->
    <broker xmlns="http://activemq.apache.org/schema/core"
brokerName="localhost" dataDirectory="${activemq.base}/data"
persistent="true" useShutdownHook="false">
 
        <!--
			For better performances use VM cursor and small memory limit.
			For more information, see:
            
            http://activemq.apache.org/message-cursors.html
            
            Also, if your producer is "hanging", it's probably due to
producer flow control.
            For more information, see:
            http://activemq.apache.org/producer-flow-control.html
        -->
              
        <destinationPolicy>
            <policyMap>
              <policyEntries>
                <policyEntry topic=">" producerFlowControl="true"
memoryLimit="1mb">
                  <pendingSubscriberPolicy>
                    <vmCursor />
                  </pendingSubscriberPolicy>
                </policyEntry>
                <policyEntry queue=">" producerFlowControl="true"
memoryLimit="1mb">
                  <!-- Use VM cursor for better latency
                       For more information, see:
                       
                       http://activemq.apache.org/message-cursors.html
                       
                  <pendingQueuePolicy>
                    <vmQueueCursor/>
                  </pendingQueuePolicy>
                  -->
                </policyEntry>
              </policyEntries>
            </policyMap>
        </destinationPolicy> 
 
        
        <!-- 
            The managementContext is used to configure how ActiveMQ is
exposed in 
            JMX. By default, ActiveMQ uses the MBean server that is started
by 
            the JVM. For more information, see: 
            
            http://activemq.apache.org/jmx.html 
        -->
        <managementContext>
            <managementContext createConnector="false"/>
        </managementContext>

        <!-- 
            Configure message persistence for the broker. The default
persistence
            mechanism is the KahaDB store (identified by the kahaDB tag). 
            For more information, see: 
            
            http://activemq.apache.org/persistence.html 
        -->
        <persistenceAdapter>            
            <kahaDB directory="${activemq.base}/data/kahadb"  />
        </persistenceAdapter>
        
        
          <!--
            The systemUsage controls the maximum amount of space the broker
will 
            use before slowing down producers. For more information, see:
            
            http://activemq.apache.org/producer-flow-control.html
             
        <systemUsage>
            <systemUsage>
                <memoryUsage>
                    <memoryUsage limit="20 mb"/>
                </memoryUsage>
                <storeUsage>
                    <storeUsage limit="1 gb"/>
                </storeUsage>
                <tempUsage>
                    <tempUsage limit="100 mb"/>
                </tempUsage>
            </systemUsage>
        </systemUsage>
		-->
		  
        <!-- 
            The transport connectors expose ActiveMQ over a given protocol
to
            clients and other brokers. For more information, see: 
            
            http://activemq.apache.org/configuring-transports.html 
        -->
        <transportConnectors>
            <transportConnector name="openwire" uri="tcp://0.0.0.0:61616"/>
        </transportConnectors>

    </broker>

    <!-- 
        Enable web consoles, REST and Ajax APIs and demos
        It also includes Camel (with its web console), see
${ACTIVEMQ_HOME}/conf/camel.xml for more info
        
        Take a look at ${ACTIVEMQ_HOME}/conf/jetty.xml for more details 
    -->
    <import resource="jetty.xml"/>
    <import resource="camel.xml"/>
    
</beans>


-- 
View this message in context: http://activemq.2283324.n4.nabble.com/Topic-messages-lost-even-when-they-are-persistent-help-tp3069828p3069828.html
Sent from the ActiveMQ - User mailing list archive at Nabble.com.

Mime
View raw message