org.springframework.jca.endpoint

Class GenericMessageEndpointManager

java.lang.Object

org.springframework.jca.endpoint.GenericMessageEndpointManager

All Implemented Interfaces:

DisposableBean, InitializingBean, Lifecycle, Phased, SmartLifecycle

Direct Known Subclasses:

JmsMessageEndpointManager

public class GenericMessageEndpointManager
extends Object
implements SmartLifecycle, InitializingBean, 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

Constructors

Constructor and Description
GenericMessageEndpointManager()

Method Summary

Modifier and Type	Method and Description
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.
int	getPhase() Return the phase in which this endpoint manager will be started and stopped.
ResourceAdapter	getResourceAdapter() Return the JCA ResourceAdapter to manage endpoints for.
boolean	isAutoStartup() Return the value for the 'autoStartup' property.
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 after this endpoint manager has been initialized and the context has been refreshed.
void	setMessageEndpointFactory(MessageEndpointFactory messageEndpointFactory) Set the JCA MessageEndpointFactory to activate, pointing to a MessageListener object that the endpoints will delegate to.
void	setPhase(int phase) Specify the phase in which this endpoint manager should be started and stopped.
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.
void	stop(Runnable callback) Indicates that a Lifecycle component must stop if it is currently running.

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 after this endpoint manager has been initialized and the context has been refreshed.

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

isAutoStartup

public boolean isAutoStartup()

Return the value for the 'autoStartup' property. If "true", this endpoint manager will start upon a ContextRefreshedEvent.

Specified by:

isAutoStartup in interface SmartLifecycle

See Also:

Lifecycle.start(), Phased.getPhase(), LifecycleProcessor.onRefresh(), ConfigurableApplicationContext.refresh()

setPhase

public void setPhase(int phase)

Specify the phase in which this endpoint manager should be started and stopped. The startup order proceeds from lowest to highest, and the shutdown order is the reverse of that. By default this value is Integer.MAX_VALUE meaning that this endpoint manager starts as late as possible and stops as soon as possible.

getPhase

public int getPhase()

Return the phase in which this endpoint manager will be started and stopped.

Specified by:

getPhase in interface Phased

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

See Also:

SmartLifecycle.isAutoStartup()

stop

public void stop()

Deactivates the configured message endpoint.

Specified by:

stop in interface Lifecycle

See Also:

SmartLifecycle.stop(Runnable), DisposableBean.destroy()

stop

public void stop(Runnable callback)

Description copied from interface: SmartLifecycle

Indicates that a Lifecycle component must stop if it is currently running.

The provided callback is used by the LifecycleProcessor to support an ordered, and potentially concurrent, shutdown of all components having a common shutdown order value. The callback must be executed after the SmartLifecycle component does indeed stop.

The LifecycleProcessor will call only this variant of the stop method; i.e. Lifecycle.stop() will not be called for SmartLifecycle implementations unless explicitly delegated to within the implementation of this method.

Specified by:

stop in interface SmartLifecycle

See Also:

Lifecycle.stop(), Phased.getPhase()

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