org.springframework.jms.listener
Class AbstractMessageListenerContainer

java.lang.Object
  org.springframework.jms.support.JmsAccessor
      org.springframework.jms.support.destination.JmsDestinationAccessor
          org.springframework.jms.listener.AbstractJmsListeningContainer
              org.springframework.jms.listener.AbstractMessageListenerContainer

All Implemented Interfaces:

Aware, BeanNameAware, DisposableBean, InitializingBean, Lifecycle, Phased, SmartLifecycle

Direct Known Subclasses:

AbstractPollingMessageListenerContainer, SimpleMessageListenerContainer

public abstract class AbstractMessageListenerContainer
extends AbstractJmsListeningContainer

Abstract base class for message listener containers. Can either host a standard JMS MessageListener or a Spring-specific SessionAwareMessageListener.

Usually holds a single JMS Connection that all listeners are supposed to be registered on, which is the standard JMS way of managing listeners. Can alternatively also be used with a fresh Connection per listener, for J2EE-style XA-aware JMS messaging. The actual registration process is up to concrete subclasses.

NOTE: The default behavior of this message listener container is to never propagate an exception thrown by a message listener up to the JMS provider. Instead, it will log any such exception at the error level. This means that from the perspective of the attendant JMS provider no such listener will ever fail. However, if error handling is necessary, then any implementation of the ErrorHandler strategy may be provided to the setErrorHandler(ErrorHandler) method. Note that JMSExceptions will be passed to the ErrorHandler in addition to (but after) being passed to an ExceptionListener, if one has been provided.

The listener container offers the following message acknowledgment options:

• "sessionAcknowledgeMode" set to "AUTO_ACKNOWLEDGE" (default): Automatic message acknowledgment before listener execution; no redelivery in case of exception thrown.
• "sessionAcknowledgeMode" set to "CLIENT_ACKNOWLEDGE": Automatic message acknowledgment after successful listener execution; no redelivery in case of exception thrown.
• "sessionAcknowledgeMode" set to "DUPS_OK_ACKNOWLEDGE": Lazy message acknowledgment during or after listener execution; potential redelivery in case of exception thrown.
• "sessionTransacted" set to "true": Transactional acknowledgment after successful listener execution; guaranteed redelivery in case of exception thrown.

The exact behavior might vary according to the concrete listener container and JMS provider used.

There are two solutions to the duplicate processing problem:

• Either add duplicate message detection to your listener, in the form of a business entity existence check or a protocol table check. This usually just needs to be done in case of the JMSRedelivered flag being set on the incoming message (else just process straightforwardly).
• Or wrap the entire processing with an XA transaction, covering the reception of the message as well as the execution of the message listener. This is only supported by DefaultMessageListenerContainer, through specifying a "transactionManager" (typically a JtaTransactionManager, with a corresponding XA-aware JMS ConnectionFactory passed in as "connectionFactory").

Note that XA transaction coordination adds significant runtime overhead, so it might be feasible to avoid it unless absolutely necessary.

Recommendations:

• The general recommendation is to set "sessionTransacted" to "true", typically in combination with local database transactions triggered by the listener implementation, through Spring's standard transaction facilities. This will work nicely in Tomcat or in a standalone environment, often combined with custom duplicate message detection (if it is unacceptable to ever process the same message twice).
• Alternatively, specify a JtaTransactionManager as "transactionManager" for a fully XA-aware JMS provider - typically when running on a J2EE server, but also for other environments with a JTA transaction manager present. This will give full "exactly-once" guarantees without custom duplicate message checks, at the price of additional runtime processing overhead.

Note that it is also possible to specify a JmsTransactionManager as external "transactionManager", providing fully synchronized Spring transactions based on local JMS transactions. The effect is similar to "sessionTransacted" set to "true", the difference being that this external transaction management will also affect independent JMS access code within the service layer (e.g. based on JmsTemplate or TransactionAwareConnectionFactoryProxy), not just direct JMS Session usage in a SessionAwareMessageListener.

Since:

2.0

Author:

Juergen Hoeller

See Also:

setMessageListener(java.lang.Object), MessageListener, SessionAwareMessageListener, handleListenerException(java.lang.Throwable), DefaultMessageListenerContainer, SimpleMessageListenerContainer, JmsMessageEndpointManager

Nested Class Summary

Nested classes/interfaces inherited from class org.springframework.jms.listener.AbstractJmsListeningContainer

AbstractJmsListeningContainer.SharedConnectionNotInitializedException

Field Summary

Fields inherited from class org.springframework.jms.listener.AbstractJmsListeningContainer

lifecycleMonitor, sharedConnectionMonitor

Fields inherited from class org.springframework.jms.support.JmsAccessor

logger

Constructor Summary

AbstractMessageListenerContainer()

Method Summary

protected void	checkMessageListener(Object messageListener) Check the given message listener, throwing an exception if it does not correspond to a supported listener type.
protected void	commitIfNecessary(Session session, Message message) Perform a commit or message acknowledgement, as appropriate.
protected void	doExecuteListener(Session session, Message message) Execute the specified listener, committing or rolling back the transaction afterwards (if necessary).
protected void	doInvokeListener(MessageListener listener, Message message) Invoke the specified listener as standard JMS MessageListener.
protected void	doInvokeListener(SessionAwareMessageListener listener, Session session, Message message) Invoke the specified listener as Spring SessionAwareMessageListener, exposing a new JMS Session (potentially with its own transaction) to the listener if demanded.
protected void	executeListener(Session session, Message message) Execute the specified listener, committing or rolling back the transaction afterwards (if necessary).
protected String	getDefaultSubscriptionName(Object messageListener) Determine the default subscription name for the given message listener.
Destination	getDestination() Return the destination to receive messages from.
protected String	getDestinationDescription() Return a descriptive String for this container's JMS destination (never null).
String	getDestinationName() Return the name of the destination to receive messages from.
String	getDurableSubscriptionName() Return the name of a durable subscription to create, if any.
ExceptionListener	getExceptionListener() Return the JMS ExceptionListener to notify in case of a JMSException thrown by the registered message listener or the invocation infrastructure, if any.
Object	getMessageListener() Return the message listener object to register.
String	getMessageSelector() Return the JMS message selector expression (or null if none).
protected void	handleListenerException(Throwable ex) Handle the given exception that arose during listener execution.
protected void	invokeErrorHandler(Throwable ex) Invoke the registered ErrorHandler, if any.
protected void	invokeExceptionListener(JMSException ex) Invoke the registered JMS ExceptionListener, if any.
protected void	invokeListener(Session session, Message message) Invoke the specified listener: either as standard JMS MessageListener or (preferably) as Spring SessionAwareMessageListener.
boolean	isAcceptMessagesWhileStopping() Return whether to accept received messages while the listener container in the process of stopping.
boolean	isExposeListenerSession() Return whether to expose the listener JMS Session to a registered SessionAwareMessageListener.
protected boolean	isSessionLocallyTransacted(Session session) Check whether the given Session is locally transacted, that is, whether its transaction is managed by this listener container's Session handling and not by an external transaction coordinator.
boolean	isSubscriptionDurable() Return whether to make the subscription durable.
protected void	rollbackIfNecessary(Session session) Perform a rollback, if appropriate.
protected void	rollbackOnExceptionIfNecessary(Session session, Throwable ex) Perform a rollback, handling rollback exceptions properly.
void	setAcceptMessagesWhileStopping(boolean acceptMessagesWhileStopping) Set whether to accept received messages while the listener container in the process of stopping.
void	setDestination(Destination destination) Set the destination to receive messages from.
void	setDestinationName(String destinationName) Set the name of the destination to receive messages from.
void	setDurableSubscriptionName(String durableSubscriptionName) Set the name of a durable subscription to create.
void	setErrorHandler(ErrorHandler errorHandler) Set an ErrorHandler to be invoked in case of any uncaught exceptions thrown while processing a Message.
void	setExceptionListener(ExceptionListener exceptionListener) Set the JMS ExceptionListener to notify in case of a JMSException thrown by the registered message listener or the invocation infrastructure.
void	setExposeListenerSession(boolean exposeListenerSession) Set whether to expose the listener JMS Session to a registered SessionAwareMessageListener as well as to JmsTemplate calls.
void	setMessageListener(Object messageListener) Set the message listener implementation to register.
void	setMessageSelector(String messageSelector) Set the JMS message selector expression (or null if none).
void	setSubscriptionDurable(boolean subscriptionDurable) Set whether to make the subscription durable.
protected void	validateConfiguration() Validate the configuration of this container.

Methods inherited from class org.springframework.jms.listener.AbstractJmsListeningContainer

afterPropertiesSet, createSharedConnection, destroy, doInitialize, doRescheduleTask, doShutdown, doStart, doStop, establishSharedConnection, getBeanName, getClientId, getPausedTaskCount, getPhase, getSharedConnection, initialize, isActive, isAutoStartup, isRunning, logRejectedTask, prepareSharedConnection, refreshSharedConnection, rescheduleTaskIfNecessary, resumePausedTasks, runningAllowed, setAutoStartup, setBeanName, setClientId, setPhase, sharedConnectionEnabled, shutdown, start, startSharedConnection, stop, stop, stopSharedConnection

Methods inherited from class org.springframework.jms.support.destination.JmsDestinationAccessor

getDestinationResolver, isPubSubDomain, resolveDestinationName, setDestinationResolver, setPubSubDomain

Methods inherited from class org.springframework.jms.support.JmsAccessor

convertJmsAccessException, createConnection, createSession, getConnectionFactory, getSessionAcknowledgeMode, isClientAcknowledge, isSessionTransacted, setConnectionFactory, setSessionAcknowledgeMode, setSessionAcknowledgeModeName, setSessionTransacted

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

AbstractMessageListenerContainer

public AbstractMessageListenerContainer()

Method Detail

setDestination

public void setDestination(Destination destination)

Set the destination to receive messages from.

Alternatively, specify a "destinationName", to be dynamically resolved via the DestinationResolver.

Note: The destination may be replaced at runtime, with the listener container picking up the new destination immediately (works e.g. with DefaultMessageListenerContainer, as long as the cache level is less than CACHE_CONSUMER). However, this is considered advanced usage; use it with care!

See Also:

setDestinationName(String)

getDestination

public Destination getDestination()

Return the destination to receive messages from. Will be null if the configured destination is not an actual Destination type; c.f. when the destination is a String.

setDestinationName

public void setDestinationName(String destinationName)

Set the name of the destination to receive messages from.

The specified name will be dynamically resolved via the configured destination resolver.

Alternatively, specify a JMS Destination object as "destination".

Note: The destination may be replaced at runtime, with the listener container picking up the new destination immediately (works e.g. with DefaultMessageListenerContainer, as long as the cache level is less than CACHE_CONSUMER). However, this is considered advanced usage; use it with care!

Parameters:

destinationName - the desired destination (can be null)

See Also:

setDestination(javax.jms.Destination)

getDestinationName

public String getDestinationName()

Return the name of the destination to receive messages from. Will be null if the configured destination is not a String type; c.f. when it is an actual Destination.

getDestinationDescription

protected String getDestinationDescription()

Return a descriptive String for this container's JMS destination (never null).

setMessageSelector

public void setMessageSelector(String messageSelector)

Set the JMS message selector expression (or null if none). Default is none.

See the JMS specification for a detailed definition of selector expressions.

Note: The message selector may be replaced at runtime, with the listener container picking up the new selector value immediately (works e.g. with DefaultMessageListenerContainer, as long as the cache level is less than CACHE_CONSUMER). However, this is considered advanced usage; use it with care!

getMessageSelector

public String getMessageSelector()

Return the JMS message selector expression (or null if none).

setMessageListener

public void setMessageListener(Object messageListener)

Set the message listener implementation to register. This can be either a standard JMS MessageListener object or a Spring SessionAwareMessageListener object.

Note: The message listener may be replaced at runtime, with the listener container picking up the new listener object immediately (works e.g. with DefaultMessageListenerContainer, as long as the cache level is less than CACHE_CONSUMER). However, this is considered advanced usage; use it with care!

Throws:

IllegalArgumentException - if the supplied listener is not a MessageListener or a SessionAwareMessageListener

See Also:

MessageListener, SessionAwareMessageListener

getMessageListener

public Object getMessageListener()

Return the message listener object to register.

checkMessageListener

protected void checkMessageListener(Object messageListener)

Check the given message listener, throwing an exception if it does not correspond to a supported listener type.

By default, only a standard JMS MessageListener object or a Spring SessionAwareMessageListener object will be accepted.

Parameters:

messageListener - the message listener object to check

Throws:

IllegalArgumentException - if the supplied listener is not a MessageListener or a SessionAwareMessageListener

See Also:

MessageListener, SessionAwareMessageListener

getDefaultSubscriptionName

protected String getDefaultSubscriptionName(Object messageListener)

Determine the default subscription name for the given message listener.

Parameters:

messageListener - the message listener object to check

Returns:

the default subscription name

See Also:

SubscriptionNameProvider

setSubscriptionDurable

public void setSubscriptionDurable(boolean subscriptionDurable)

Set whether to make the subscription durable. The durable subscription name to be used can be specified through the "durableSubscriptionName" property.

Default is "false". Set this to "true" to register a durable subscription, typically in combination with a "durableSubscriptionName" value (unless your message listener class name is good enough as subscription name).

Only makes sense when listening to a topic (pub-sub domain).

See Also:

setDurableSubscriptionName(java.lang.String)

isSubscriptionDurable

public boolean isSubscriptionDurable()

Return whether to make the subscription durable.

setDurableSubscriptionName

public void setDurableSubscriptionName(String durableSubscriptionName)

Set the name of a durable subscription to create. To be applied in case of a topic (pub-sub domain) with subscription durability activated.

The durable subscription name needs to be unique within this client's JMS client id. Default is the class name of the specified message listener.

Note: Only 1 concurrent consumer (which is the default of this message listener container) is allowed for each durable subscription.

See Also:

setSubscriptionDurable(boolean), AbstractJmsListeningContainer.setClientId(java.lang.String), setMessageListener(java.lang.Object)

getDurableSubscriptionName

public String getDurableSubscriptionName()

Return the name of a durable subscription to create, if any.

setExceptionListener

public void setExceptionListener(ExceptionListener exceptionListener)

Set the JMS ExceptionListener to notify in case of a JMSException thrown by the registered message listener or the invocation infrastructure.

getExceptionListener

public ExceptionListener getExceptionListener()

Return the JMS ExceptionListener to notify in case of a JMSException thrown by the registered message listener or the invocation infrastructure, if any.

setErrorHandler

public void setErrorHandler(ErrorHandler errorHandler)

Set an ErrorHandler to be invoked in case of any uncaught exceptions thrown while processing a Message. By default there will be no ErrorHandler so that error-level logging is the only result.

setExposeListenerSession

public void setExposeListenerSession(boolean exposeListenerSession)

Set whether to expose the listener JMS Session to a registered SessionAwareMessageListener as well as to JmsTemplate calls.

Default is "true", reusing the listener's Session. Turn this off to expose a fresh JMS Session fetched from the same underlying JMS Connection instead, which might be necessary on some JMS providers.

Note that Sessions managed by an external transaction manager will always get exposed to JmsTemplate calls. So in terms of JmsTemplate exposure, this setting only affects locally transacted Sessions.

See Also:

SessionAwareMessageListener

isExposeListenerSession

public boolean isExposeListenerSession()

Return whether to expose the listener JMS Session to a registered SessionAwareMessageListener.

setAcceptMessagesWhileStopping

public void setAcceptMessagesWhileStopping(boolean acceptMessagesWhileStopping)

Set whether to accept received messages while the listener container in the process of stopping.

Default is "false", rejecting such messages through aborting the receive attempt. Switch this flag on to fully process such messages even in the stopping phase, with the drawback that even newly sent messages might still get processed (if coming in before all receive timeouts have expired).

NOTE: Aborting receive attempts for such incoming messages might lead to the provider's retry count decreasing for the affected messages. If you have a high number of concurrent consumers, make sure that the number of retries is higher than the number of consumers, to be on the safe side for all potential stopping scenarios.

isAcceptMessagesWhileStopping

public boolean isAcceptMessagesWhileStopping()

Return whether to accept received messages while the listener container in the process of stopping.

validateConfiguration

protected void validateConfiguration()

Description copied from class: AbstractJmsListeningContainer

Validate the configuration of this container.

The default implementation is empty. To be overridden in subclasses.

Overrides:

validateConfiguration in class AbstractJmsListeningContainer

executeListener

protected void executeListener(Session session,
                               Message message)

Execute the specified listener, committing or rolling back the transaction afterwards (if necessary).

Parameters:

session - the JMS Session to operate on

message - the received JMS Message

See Also:

invokeListener(javax.jms.Session, javax.jms.Message), commitIfNecessary(javax.jms.Session, javax.jms.Message), rollbackOnExceptionIfNecessary(javax.jms.Session, java.lang.Throwable), handleListenerException(java.lang.Throwable)

doExecuteListener

protected void doExecuteListener(Session session,
                                 Message message)
                          throws JMSException

Execute the specified listener, committing or rolling back the transaction afterwards (if necessary).

Parameters:

session - the JMS Session to operate on

message - the received JMS Message

Throws:

JMSException - if thrown by JMS API methods

See Also:

invokeListener(javax.jms.Session, javax.jms.Message), commitIfNecessary(javax.jms.Session, javax.jms.Message), rollbackOnExceptionIfNecessary(javax.jms.Session, java.lang.Throwable), JmsAccessor.convertJmsAccessException(javax.jms.JMSException)

invokeListener

protected void invokeListener(Session session,
                              Message message)
                       throws JMSException

Invoke the specified listener: either as standard JMS MessageListener or (preferably) as Spring SessionAwareMessageListener.

Parameters:

session - the JMS Session to operate on

message - the received JMS Message

Throws:

JMSException - if thrown by JMS API methods

See Also:

setMessageListener(java.lang.Object)

doInvokeListener

protected void doInvokeListener(SessionAwareMessageListener listener,
                                Session session,
                                Message message)
                         throws JMSException

Invoke the specified listener as Spring SessionAwareMessageListener, exposing a new JMS Session (potentially with its own transaction) to the listener if demanded.

Parameters:

listener - the Spring SessionAwareMessageListener to invoke

session - the JMS Session to operate on

message - the received JMS Message

Throws:

JMSException - if thrown by JMS API methods

See Also:

SessionAwareMessageListener, setExposeListenerSession(boolean)

doInvokeListener

protected void doInvokeListener(MessageListener listener,
                                Message message)
                         throws JMSException

Invoke the specified listener as standard JMS MessageListener.

Default implementation performs a plain invocation of the onMessage method.

Parameters:

listener - the JMS MessageListener to invoke

message - the received JMS Message

Throws:

JMSException - if thrown by JMS API methods

See Also:

MessageListener.onMessage(javax.jms.Message)

commitIfNecessary

protected void commitIfNecessary(Session session,
                                 Message message)
                          throws JMSException

Perform a commit or message acknowledgement, as appropriate.

Parameters:

session - the JMS Session to commit

message - the Message to acknowledge

Throws:

JMSException - in case of commit failure

rollbackIfNecessary

protected void rollbackIfNecessary(Session session)
                            throws JMSException

Perform a rollback, if appropriate.

Parameters:

session - the JMS Session to rollback

Throws:

JMSException - in case of a rollback error

rollbackOnExceptionIfNecessary

protected void rollbackOnExceptionIfNecessary(Session session,
                                              Throwable ex)
                                       throws JMSException

Perform a rollback, handling rollback exceptions properly.

Parameters:

session - the JMS Session to rollback

ex - the thrown application exception or error

Throws:

JMSException - in case of a rollback error

isSessionLocallyTransacted

protected boolean isSessionLocallyTransacted(Session session)

Check whether the given Session is locally transacted, that is, whether its transaction is managed by this listener container's Session handling and not by an external transaction coordinator.

Note: The Session's own transacted flag will already have been checked before. This method is about finding out whether the Session's transaction is local or externally coordinated.

Parameters:

session - the Session to check

Returns:

whether the given Session is locally transacted

See Also:

JmsAccessor.isSessionTransacted(), ConnectionFactoryUtils.isSessionTransactional(javax.jms.Session, javax.jms.ConnectionFactory)

handleListenerException

protected void handleListenerException(Throwable ex)

Handle the given exception that arose during listener execution.

The default implementation logs the exception at warn level, not propagating it to the JMS provider — assuming that all handling of acknowledgement and/or transactions is done by this listener container. This can be overridden in subclasses.

Parameters:

ex - the exception to handle

invokeExceptionListener

protected void invokeExceptionListener(JMSException ex)

Invoke the registered JMS ExceptionListener, if any.

Parameters:

ex - the exception that arose during JMS processing

See Also:

setExceptionListener(javax.jms.ExceptionListener)

invokeErrorHandler

protected void invokeErrorHandler(Throwable ex)

Invoke the registered ErrorHandler, if any. Log at warn level otherwise.

Parameters:

ex - the uncaught error that arose during JMS processing.

See Also:

setErrorHandler(org.springframework.util.ErrorHandler)