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ActiveMQ message broker can be embedded in another product and Geronimo uses this feature to bundle ActiveMQ. Geronimo uses GBean architecture to manage the lifecycle of ActiveMQ. The properties of ActiveMQ are exposed as GBean properties and the life cycle methods start and stop are managed by the kernel.

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ActiveMQ is accessed in Geronimo by means of a JCA 1.5 Resource Adapter (RA). Resource Adapter provides connection, transaction, security and work management. By means of Outbound connections of ActiveMQ RA J2EE components in Geronimo can send messages to Queue or Topic in ActiveMQ. Inbound connections of Resource Adapter provide activation of Message Beans.

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Integrating JMS Provider with Geronimo

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geronimo-ra.xml can be used to configure instances of resource adapters for different JMS providers. The example covered in this article shows two configurations, one for OpenJMS and one for WebsphereMQ. The connection definition properties are changed for different JMS providers. The outbound communication of Resource Adapter uses these properties to get a connection factory and create connections to Queue or Topic.

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Deploying JMS Resource Adapter

This section shows how to deploy a JMS Resource Adapter and configure a J2EE application to use OpenJMS and WebSphereMQ as JMS providers. RA can be deployed in the server scope and instances can be used within scope of application.

The following steps show how to deploy the JMS Resource Adapter and configure OpenJMS and WebSphereMQ providers for Geronimo.

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Configuring OpenJMS

OpenJMS starts RMI naming server on port 1019. This will conflict with the default RMI naming port in Geronimo. You will have to change the configuration for OpenJMS to use a different port and then start the OpenJMS server. Create QueueConnectionFactory and TopicConnectionFactory objects for OpenJMS. Define Queue's and Topics in openjms.xml. The following example shows relevant sections of the configuration file.

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