The Spring Framework

## org.springframework.jca.endpoint
Class GenericMessageEndpointManager

    java.lang.Object
      org.springframework.jca.endpoint.GenericMessageEndpointManager

All Implemented Interfaces:
  DisposableBean, InitializingBean, Lifecycle

Direct Known Subclasses:
  JmsMessageEndpointManager

    public class GenericMessageEndpointManager

extends Object
implements InitializingBean, Lifecycle, DisposableBean

Generic bean that manages JCA 1.5 message endpoints within a Spring application context, activating and deactivating the endpoint as part of the application context's lifecycle.

This class is completely generic in that it may work with any ResourceAdapter, any MessageEndpointFactory, and any ActivationSpec. It can be configured in standard bean style, for example through Spring's XML bean definition format, as follows:

     <bean class="org.springframework.jca.endpoint.GenericMessageEndpointManager">
             <property name="resourceAdapter" ref="resourceAdapter"/>
             <property name="messageEndpointFactory">
         <bean class="org.springframework.jca.endpoint.GenericMessageEndpointFactory">
           <property name="messageListener" ref="messageListener"/>
         </bean>
             </property>
             <property name="activationSpec">
         <bean class="org.apache.activemq.ra.ActiveMQActivationSpec">
           <property name="destination" value="myQueue"/>
           <property name="destinationType" value="javax.jms.Queue"/>
         </bean>
       </property>
     </bean>

In this example, Spring's own `GenericMessageEndpointFactory` is used to point to a standard message listener object that happens to be supported by the specified target ResourceAdapter: in this case, a JMS `MessageListener` object as supported by the ActiveMQ message broker, defined as a Spring bean:

     <bean id="messageListener" class="com.myorg.messaging.myMessageListener">
       ...
     </bean>

The target ResourceAdapter may be configured as a local Spring bean as well (the typical case) or obtained from JNDI (e.g. on WebLogic). For the example above, a local ResourceAdapter bean could be defined as follows (matching the "resourceAdapter" bean reference above):

     <bean id="resourceAdapter" class="org.springframework.jca.support.ResourceAdapterFactoryBean">
       <property name="resourceAdapter">
         <bean class="org.apache.activemq.ra.ActiveMQResourceAdapter">
           <property name="serverUrl" value="tcp://localhost:61616"/>
         </bean>
       </property>
       <property name="workManager">
         <bean class="org.springframework.jca.work.SimpleTaskWorkManager"/>
       </property>
     </bean>

For a different target resource, the configuration would simply point to a different ResourceAdapter and a different ActivationSpec object (which are both specific to the resource provider), and possibly a different message listener (e.g. a CCI `MessageListener` for a resource adapter which is based on the JCA Common Client Interface).

The asynchronous execution strategy can be customized through the "workManager" property on the ResourceAdapterFactoryBean (as shown above). Check out `SimpleTaskWorkManager`'s javadoc for its configuration options; alternatively, any other JCA-compliant WorkManager can be used (e.g. Geronimo's).

Transactional execution is a responsibility of the concrete message endpoint, as built by the specified MessageEndpointFactory. `GenericMessageEndpointFactory` supports XA transaction participation through its "transactionManager" property, typically with a Spring `JtaTransactionManager` or a plain `TransactionManager` implementation specified there.

     <bean class="org.springframework.jca.endpoint.GenericMessageEndpointManager">
             <property name="resourceAdapter" ref="resourceAdapter"/>
             <property name="messageEndpointFactory">
         <bean class="org.springframework.jca.endpoint.GenericMessageEndpointFactory">
           <property name="messageListener" ref="messageListener"/>
           <property name="transactionManager" ref="transactionManager"/>
         </bean>
             </property>
             <property name="activationSpec">
         <bean class="org.apache.activemq.ra.ActiveMQActivationSpec">
           <property name="destination" value="myQueue"/>
           <property name="destinationType" value="javax.jms.Queue"/>
         </bean>
       </property>
     </bean>

     <bean id="transactionManager" class="org.springframework.transaction.jta.JtaTransactionManager"/>

Alternatively, check out your resource provider's ActivationSpec object, which should support local transactions through a provider-specific config flag, e.g. ActiveMQActivationSpec's "useRAManagedTransaction" bean property.

     <bean class="org.springframework.jca.endpoint.GenericMessageEndpointManager">
             <property name="resourceAdapter" ref="resourceAdapter"/>
             <property name="messageEndpointFactory">
         <bean class="org.springframework.jca.endpoint.GenericMessageEndpointFactory">
           <property name="messageListener" ref="messageListener"/>
         </bean>
             </property>
             <property name="activationSpec">
         <bean class="org.apache.activemq.ra.ActiveMQActivationSpec">
           <property name="destination" value="myQueue"/>
           <property name="destinationType" value="javax.jms.Queue"/>
           <property name="useRAManagedTransaction" value="true"/>
         </bean>
       </property>
     </bean>

Since:
  2.5
Author:
  Juergen Hoeller
See Also:
  `ResourceAdapter.endpointActivation(javax.resource.spi.endpoint.MessageEndpointFactory, javax.resource.spi.ActivationSpec)`, `ResourceAdapter.endpointDeactivation(javax.resource.spi.endpoint.MessageEndpointFactory, javax.resource.spi.ActivationSpec)`, `MessageEndpointFactory`, `ActivationSpec`

Constructor Summary
`GenericMessageEndpointManager()`

Method Summary
`void` `afterPropertiesSet()` Prepares the message endpoint, and automatically activates it if the "autoStartup" flag is set to "true".
`void` `destroy()` Deactivates the message endpoint, preparing it for shutdown.
`ActivationSpec` `getActivationSpec()` Return the JCA ActivationSpec to use for activating the endpoint.
`MessageEndpointFactory` `getMessageEndpointFactory()` Return the JCA MessageEndpointFactory to activate.
`ResourceAdapter` `getResourceAdapter()` Return the JCA ResourceAdapter to manage endpoints for.
`boolean` `isRunning()` Return whether the configured message endpoint is currently active.
`void` `setActivationSpec(ActivationSpec activationSpec)` Set the JCA ActivationSpec to use for activating the endpoint.
`void` `setAutoStartup(boolean autoStartup)` Set whether to auto-start the endpoint activation along with this endpoint manager's initialization.
`void` `setMessageEndpointFactory(MessageEndpointFactory messageEndpointFactory)` Set the JCA MessageEndpointFactory to activate, pointing to a MessageListener object that the endpoints will delegate to.
`void` `setResourceAdapter(ResourceAdapter resourceAdapter)` Set the JCA ResourceAdapter to manage endpoints for.
`void` `start()` Activates the configured message endpoint.
`void` `stop()` Deactivates the configured message endpoint.

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Constructor Detail

### GenericMessageEndpointManager

    public GenericMessageEndpointManager()

Method Detail

### setResourceAdapter

    public void setResourceAdapter(ResourceAdapter resourceAdapter)

  Set the JCA ResourceAdapter to manage endpoints for.

### getResourceAdapter

    public ResourceAdapter getResourceAdapter()

  Return the JCA ResourceAdapter to manage endpoints for.

### setMessageEndpointFactory

    public void setMessageEndpointFactory(MessageEndpointFactory messageEndpointFactory)

  Set the JCA MessageEndpointFactory to activate, pointing to a MessageListener object that the endpoints will delegate to.

  A MessageEndpointFactory instance may be shared across multiple endpoints (i.e. multiple GenericMessageEndpointManager instances), with different `ActivationSpec` objects applied.

  See Also:
    `GenericMessageEndpointFactory.setMessageListener(java.lang.Object)`

### getMessageEndpointFactory

    public MessageEndpointFactory getMessageEndpointFactory()

  Return the JCA MessageEndpointFactory to activate.

### setActivationSpec

    public void setActivationSpec(ActivationSpec activationSpec)

  Set the JCA ActivationSpec to use for activating the endpoint.

  Note that this ActivationSpec instance should not be shared across multiple ResourceAdapter instances.

### getActivationSpec

    public ActivationSpec getActivationSpec()

  Return the JCA ActivationSpec to use for activating the endpoint.

### setAutoStartup

    public void setAutoStartup(boolean autoStartup)

  Set whether to auto-start the endpoint activation along with this endpoint manager's initialization.

  Default is "true". Turn this flag off to defer the endpoint activation until an explicit {#start()} call.

### afterPropertiesSet

    public void afterPropertiesSet()
                            throws ResourceException

  Prepares the message endpoint, and automatically activates it if the "autoStartup" flag is set to "true".

  Specified by:
    `afterPropertiesSet` in interface `InitializingBean`
  Throws:
    `ResourceException`

### start

    public void start()

  Activates the configured message endpoint.

  Specified by:
    `start` in interface `Lifecycle`

### stop

    public void stop()

  Deactivates the configured message endpoint.

  Specified by:
    `stop` in interface `Lifecycle`

### isRunning

    public boolean isRunning()

  Return whether the configured message endpoint is currently active.

  Specified by:
    `isRunning` in interface `Lifecycle`
  Returns:
    whether the component is currently running

### destroy

    public void destroy()

  Deactivates the message endpoint, preparing it for shutdown.

  Specified by:
    `destroy` in interface `DisposableBean`

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