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From "Rajika Kumarasiri (JIRA)" <j...@apache.org>
Subject [jira] Created: (AXIS2-4658) Caching InitialContexts in JMS transport sender
Date Sat, 20 Mar 2010 17:19:27 GMT
Caching InitialContexts in JMS transport sender
-----------------------------------------------

                 Key: AXIS2-4658
                 URL: https://issues.apache.org/jira/browse/AXIS2-4658
             Project: Axis2
          Issue Type: Improvement
          Components: transports
            Reporter: Rajika Kumarasiri


When using the JMS transport sender for sending messages  to external broker it creates InitialContext
per message. This is actually unnecessary since we can cache and use the same intialContext.,
and also some brokers behave strangely when re-creating the initialContext. This patch cache
the InitalContext using the EPR as the key. User can specify to use caching using the property
"transport.jms.CacheInitialContext" set to true. Synchronization has done as required since
creating InitialContext is not thread safe and also JNDI look up. 
User has to define an Initial Context definition in the JMSTransport sender configuration
as follows. 

<transportSender name="jms" class="org.apache.axis2.transport.jms.JMSSender">
        <parameter name="default" locked="false">
        	<parameter name="java.naming.factory.initial" locked="false">org.apache.activemq.jndi.ActiveMQInitialContextFactory</parameter>
        	<parameter name="java.naming.provider.url" locked="false">tcp://localhost:61616</parameter>
        	<parameter name="transport.jms.ConnectionFactoryJNDIName" locked="false">QueueConnectionFactory</parameter>
		<parameter name="transport.jms.ConnectionFactoryType" locked="false">queue</parameter>
		<parameter name="transport.jms.CacheLevel">producer</parameter>
                <parameter name="transport.jms.CacheInitialContext">true</parameter>
        </parameter>
</transportSender> 

A related discusstions also can be found here: http://wso2.org/forum/thread/9281
Some of the improvements in this patch was suggested by Paul Inglis who also submitted the
patch for issue - https://issues.apache.org/jira/browse/AXIS2-4625 

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