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Oracle GlassFish Server 3.1 Application Development Guide
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Document Information


Part I Development Tasks and Tools

1.  Setting Up a Development Environment

2.  Class Loaders

3.  Debugging Applications

Part II Developing Applications and Application Components

4.  Securing Applications

5.  Developing Web Services

6.  Using the Java Persistence API

7.  Developing Web Applications

8.  Using Enterprise JavaBeans Technology

9.  Using Container-Managed Persistence

10.  Developing Java Clients

11.  Developing Connectors

Connector Support in the GlassFish Server

Connector Architecture for JMS and JDBC

Connector Configuration

Advanced Connector Configuration Options

Thread Associations

Security Maps

Work Security Maps

Overriding Configuration Properties

Testing a Connector Connection Pool

Flushing a Connector Connection Pool

Handling Invalid Connections

Setting the Shutdown Timeout

Specifying the Class Loading Policy

Using Last Agent Optimization of Transactions

Disabling Pooling for a Connection

Using Application-Scoped Connectors

Inbound Communication Support

Outbound Communication Support

Configuring a Message Driven Bean to Use a Resource Adapter

12.  Developing Lifecycle Listeners

13.  Developing OSGi-enabled Java EE Applications

Part III Using Services and APIs

14.  Using the JDBC API for Database Access

15.  Using the Transaction Service

16.  Using the Java Naming and Directory Interface

17.  Using the Java Message Service

18.  Using the JavaMail API


Configuring a Message Driven Bean to Use a Resource Adapter

The Connectors specification’s message inflow contract provides a generic mechanism to plug in a wide-range of message providers, including JMS, into a Java-EE-compatible application server. Message providers use a resource adapter and dispatch messages to message endpoints, which are implemented as message-driven beans.

The message-driven bean developer provides activation configuration information in the message-driven bean’s ejb-jar.xml file. Configuration information includes messaging-style-specific configuration details, and possibly message-provider-specific details as well. The message-driven bean deployer uses this configuration information to set up the activation specification JavaBean. The activation configuration properties specified in ejb-jar.xml override configuration properties in the activation specification definition in the ra.xml file.

According to the EJB specification, the messaging-style-specific descriptor elements contained within the activation configuration element are not specified because they are specific to a messaging provider. In the following sample message-driven bean ejb-jar.xml, a message-driven bean has the following activation configuration property names: destinationType, SubscriptionDurability, and MessageSelector.

<!--  A sample MDB that listens to a JMS Topic -->
<!-- message-driven bean deployment descriptor -->
       JMSType = 'car' AND color = 'blue'

When the message-driven bean is deployed, the value for the resource-adapter-mid element in the glassfish-ejb-jar.xml file is set to the resource adapter module name that delivers messages to the message endpoint (to the message-driven bean). In the following example, the jmsra JMS resource adapter, which is the bundled resource adapter for the Message Queue message provider, is specified as the resource adapter module identifier for the SampleMDB bean.

    <!-- JNDI name of the destination from which messages would be 
         delivered from MDB needs to listen to -->
       <!-- Resource Adapter Module Id that would deliver messages to 
            this message endpoint -->

When the message-driven bean is deployed, the GlassFish Server uses the resourceadapter-mid setting to associate the resource adapter with a message endpoint through the message inflow contract. This message inflow contract with the GlassFish Server gives the resource adapter a handle to the MessageEndpointFactory and the ActivationSpec JavaBean, and the adapter uses this handle to deliver messages to the message endpoint instances (which are created by the MessageEndpointFactory).

When a message-driven bean first created for use on the GlassFish Server 7 is deployed, the Connector runtime transparently transforms the previous deployment style to the current connector-based deployment style. If the deployer specifies neither a resource-adapter-mid element nor the Message Queue resource adapter’s activation configuration properties, the Connector runtime maps the message-driven bean to the jmsra system resource adapter and converts the JMS-specific configuration to the Message Queue resource adapter’s activation configuration properties.