Qpid JMS Event Receiver

Qpid JMS event receiver is an internal event receiver that comes with WSO2 products by default. You can configure it with map, XML, JSON, and text input mapping types.

Prerequisites

Follow the steps below to set up the prerequisites before starting the event receiver configurations.

Install JMS-Qpid Broker and JMS-Qpid Client.
Configure WSO2 CEP by adding relevant libraries to support JMS transport.
Open the <CEP_HOME>/repository/conf/jndi.properties file and register a connection factory by entering relevant details in the register some connection factories section. Below is a sample for a connection factory named TopicConnectionFactory( the "default" is the name of the virtually hosted node in Qpid).
connectionfactory.TopicConnectionFactory=amqp://admin:admin@clientid/default?brokerlist='tcp://localhost:5672'
Start the Qpid JMS server.

Creating a Qpid JMS event receiver

For instructions on creating a Qpid JMS event receiver, see Receiving Events .

Configuring adapter properties

Specify the Adapter Properties, when creating a Qpid JMS event receiver using the management console as shown below.

After entering the above adapter properties, select the Event Stream to which you want to map the incoming events, and the Message Format which you want to apply on the receiving events . Also, click Advanced to define custom input mappings based on the Message Format you selected. For more information on custom input mapping types, see Input Mapping Types .

You can also d efine the respective adapter properties of the event receiver based on the transport type within the <from> element of the event receiver configuration in the <PRODUCT_HOME>/repository/deployment/server/eventreceivers/ directory as follows.

<eventReceiver name="QpidJMSInputEventAdapter" statistics="disable" trace="disable" xmlns="http://wso2.org/carbon/eventreceiver">
    <from eventAdapterType="jms">
        <property name="java.naming.factory.initial">org.apache.qpid.jndi.PropertiesFileInitialContextFactory</property>
        <property name="java.naming.provider.url">repository/conf/jndi.properties</property>
        <property name="transport.jms.DestinationType">topic</property>
        <property name="transport.jms.SubscriptionDurable">false</property>
        <property name="transport.jms.Destination">test-topic</property>
        <property name="transport.jms.ConnectionFactoryJNDIName">TopicConnectionFactory</property>
        <property encrypted="true" name="transport.jms.Password">P2ve4G8+qF7JXkiGnP9/Ew5GXALEWTu7znEwxZGYa/MQMaQBRfsXiP094fn9U+0rntdBMitXU9o7h5uV3m5h97Po8WTJRpnFBV5YCGZEO+ELSg6twY3386MipwFhFMrbUMKamI2sXksDRcogojWKtoHNmODnt8Ud1dh0LK5zqec=        </property>
        <property name="transport.jms.UserName">jms-user</property>
        <property name="transport.jms.DurableSubscriberName">subscriber</property>
        <property name="jms.properties">SessionTransacted:false</property>
    </from>
    ...........................
</eventReceiver>

The above adapter properties are described below.

Adapter Property	Description	Configuration file property	Example
Topic/Queue Name	Valid name for the JMS topic. WSO2 CEP/DAS sends and receives messages by subscribing to a topic or using named queues.	transport.jms.Destination	test-topic
JNDI Initial Context Factory Class	JNDI initial context factory class. The class must implement the `java.naming.spi.InitialContextFactory` interface.	java.naming.factory.initial	org.apache.qpid.jndi.PropertiesFileInitialContextFactory
JNDI Provider URL	URL of the JNDI provider.	java.naming.provider.url	repository/conf/jndi.properties
The JMS connection password	A valid password for the JMS connection	transport.jms.Password	jms-password
The JMS connection username	A valid username for the JMS connection	transport.jms.UserName	jms-user
Connection Factory JNDI Name	The JNDI name of the connection factory.	transport.jms.ConnectionFactoryJNDIName	TopicConnectionFactory
Destination Type	Define the sort order for messages that arrive on a specific destination.	transport.jms.DestinationType	topic/queue
Enable Durable Subscription	Whether the subscription is durable or not.	transport.jms.SubscriptionDurable	true/false
Durable Subscriber Name	A valid name of a durable subscriber (Durable subscription gets enabled if you add a value here.)	transport.jms.DurableSubscriberName	subscriber
JMS Properties	A valid "property:value" pair of Axis2 JMS properties. (E.g. "property1: value1, property2: value2") For more information on Axis2 JMS properties, go to Apache AXIS2 Transports Documentation .	jms.properties	SessionTransacted:false