Package org.springframework.amqp.rabbit.listener

Class AbstractMessageListenerContainer

    • Field Detail

      • DEFAULT_DEBATCHING_ENABLED

        public static final boolean DEFAULT_DEBATCHING_ENABLED
        See Also:
        Constant Field Values

      • DEFAULT_RECOVERY_INTERVAL

        public static final long DEFAULT_RECOVERY_INTERVAL
        The default recovery interval: 5000 ms = 5 seconds.
        See Also:
        Constant Field Values

      • DEFAULT_SHUTDOWN_TIMEOUT

        public static final long DEFAULT_SHUTDOWN_TIMEOUT
        See Also:
        Constant Field Values

      • consumersMonitor

        protected final Object consumersMonitor

    • Constructor Detail

      • AbstractMessageListenerContainer

        public AbstractMessageListenerContainer()

    • Method Detail

      • setAcknowledgeMode

        public final void setAcknowledgeMode​(AcknowledgeMode acknowledgeMode)

        Flag controlling the behaviour of the container with respect to message acknowledgement. The most common usage is to let the container handle the acknowledgements (so the listener doesn't need to know about the channel or the message).

        Set to AcknowledgeMode.MANUAL if the listener will send the acknowledgements itself using Channel.basicAck(long, boolean). Manual acks are consistent with either a transactional or non-transactional channel, but if you are doing no other work on the channel at the same other than receiving a single message then the transaction is probably unnecessary.

        Set to AcknowledgeMode.NONE to tell the broker not to expect any acknowledgements, and it will assume all messages are acknowledged as soon as they are sent (this is "autoack" in native Rabbit broker terms). If AcknowledgeMode.NONE then the channel cannot be transactional (so the container will fail on start up if that flag is accidentally set).

        Parameters:
        acknowledgeMode - the acknowledge mode to set. Defaults to AcknowledgeMode.AUTO
        See Also:
        AcknowledgeMode

      • getAcknowledgeMode

        public AcknowledgeMode getAcknowledgeMode()
        Returns:
        the acknowledgeMode

      • setQueueNames

        public void setQueueNames​(String... queueName)
        Set the name of the queue(s) to receive messages from.
        Specified by:
        setQueueNames in interface MessageListenerContainer
        Parameters:
        queueName - the desired queueName(s) (can not be null)

      • setQueues

        public final void setQueues​(Queue... queues)
        Set the name of the queue(s) to receive messages from.
        Parameters:
        queues - the desired queue(s) (can not be null)

      • getQueueNames

        public String[] getQueueNames()
        Returns:
        the name of the queues to receive messages from.

      • getQueueNamesAsSet

        protected Set<String> getQueueNamesAsSet()

      • getQueueNamesToQueues

        protected Map<String,​Queue> getQueueNamesToQueues()
        Returns a map of current queue names to the Queue object; allows the determination of a changed broker-named queue.
        Returns:
        the map.
        Since:
        2.1

      • addQueueNames

        public void addQueueNames​(String... queueNames)
        Add queue(s) to this container's list of queues.
        Parameters:
        queueNames - The queue(s) to add.

      • addQueues

        public void addQueues​(Queue... queues)
        Add queue(s) to this container's list of queues.
        Parameters:
        queues - The queue(s) to add.

      • removeQueueNames

        public boolean removeQueueNames​(String... queueNames)
        Remove queue(s) from this container's list of queues.
        Parameters:
        queueNames - The queue(s) to remove.
        Returns:
        the boolean result of removal on the target queueNames List.

      • removeQueues

        public boolean removeQueues​(Queue... queues)
        Remove queue(s) from this container's list of queues.
        Parameters:
        queues - The queue(s) to remove.
        Returns:
        the boolean result of removal on the target queueNames List.

      • isExposeListenerChannel

        public boolean isExposeListenerChannel()
        Returns:
        whether to expose the listener Channel to a registered ChannelAwareMessageListener.

      • setExposeListenerChannel

        public void setExposeListenerChannel​(boolean exposeListenerChannel)
        Set whether to expose the listener Rabbit Channel to a registered ChannelAwareMessageListener as well as to RabbitTemplate calls.

        Default is "true", reusing the listener's Channel. Turn this off to expose a fresh Rabbit Channel fetched from the same underlying Rabbit Connection instead.

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

        Parameters:
        exposeListenerChannel - true to expose the channel.
        See Also:
        ChannelAwareMessageListener

      • setMessageListener

        public void setMessageListener​(MessageListener messageListener)
        Set the MessageListener.
        Parameters:
        messageListener - the listener.
        Since:
        2.0

      • checkMessageListener

        protected void checkMessageListener​(Object listener)
        Check the given message listener, throwing an exception if it does not correspond to a supported listener type.

        Only a Spring MessageListener object will be accepted.

        Parameters:
        listener - the message listener object to check
        Throws:
        IllegalArgumentException - if the supplied listener is not a MessageListener
        See Also:
        MessageListener

      • 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 a ConditionalRejectingErrorHandler with its default list of fatal exceptions will be used.
        Parameters:
        errorHandler - The error handler.

      • setDeBatchingEnabled

        public void setDeBatchingEnabled​(boolean deBatchingEnabled)
        Determine whether or not the container should de-batch batched messages (true) or call the listener with the batch (false). Default: true.
        Parameters:
        deBatchingEnabled - the deBatchingEnabled to set.
        See Also:
        setBatchingStrategy(BatchingStrategy)

      • isDeBatchingEnabled

        protected boolean isDeBatchingEnabled()

      • setAdviceChain

        public void setAdviceChain​(Advice... adviceChain)
        Public setter for the Advice to apply to listener executions.

        If a {code #setTransactionManager(PlatformTransactionManager) transactionManager} is provided as well, then separate advice is created for the transaction and applied first in the chain. In that case the advice chain provided here should not contain a transaction interceptor (otherwise two transactions would be be applied).

        Parameters:
        adviceChain - the advice chain to set

      • getAdviceChain

        protected Advice[] getAdviceChain()

      • addAfterReceivePostProcessors

        public void addAfterReceivePostProcessors​(MessagePostProcessor... postprocessors)
        Add MessagePostProcessors that will be applied after message reception, before invoking the MessageListener. Often used to decompress data. Processors are invoked in order, depending on PriorityOrder, Order and finally unordered.

        In contrast to setAfterReceivePostProcessors(MessagePostProcessor...), this method does not override the previously added afterReceivePostProcessors.

        Parameters:
        postprocessors - the post processor.
        Since:
        2.1.4

      • setAutoStartup

        public void setAutoStartup​(boolean autoStartup)
        Set whether to automatically start the container after initialization.

        Default is "true"; set this to "false" to allow for manual startup through the start() method.

        Specified by:
        setAutoStartup in interface MessageListenerContainer
        Parameters:
        autoStartup - true for auto startup.

      • setPhase

        public void setPhase​(int phase)
        Specify the phase in which this container 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 container starts as late as possible and stops as soon as possible.
        Parameters:
        phase - The phase.

      • getPhase

        public int getPhase()
        Specified by:
        getPhase in interface Phased
        Specified by:
        getPhase in interface SmartLifecycle
        Returns:
        The phase in which this container will be started and stopped.

      • getBeanName

        @Nullable
protected final String getBeanName()
        Returns:
        The bean name that this listener container has been assigned in its containing bean factory, if any.

      • setLookupKeyQualifier

        public void setLookupKeyQualifier​(String lookupKeyQualifier)
        Set a qualifier that will prefix the connection factory lookup key; default none.
        Parameters:
        lookupKeyQualifier - the qualifier
        Since:
        1.6.9
        See Also:
        getRoutingLookupKey()

      • isForceCloseChannel

        protected boolean isForceCloseChannel()
        Force close the channel if the consumer threads don't respond to a shutdown.
        Returns:
        true to force close.
        Since:
        1.7.4

      • setForceCloseChannel

        public void setForceCloseChannel​(boolean forceCloseChannel)
        Set to true to force close the channel if the consumer threads don't respond to a shutdown. Default: true (since 2.0).
        Parameters:
        forceCloseChannel - true to force close.
        Since:
        1.7.4

      • getRoutingLookupKey

        @Nullable
protected String getRoutingLookupKey()
        Return the lookup key if the connection factory is a RoutingConnectionFactory; null otherwise. The routing key is the comma-delimited list of queue names with all spaces removed and bracketed by [...], optionally prefixed by a qualifier, e.g. "foo[...]".
        Returns:
        the key or null.
        Since:
        1.6.9
        See Also:
        setLookupKeyQualifier(String)

      • getListenerId

        @Nullable
public String getListenerId()
        The 'id' attribute of the listener.
        Returns:
        the id (or the container bean name if no id set).

      • setConsumerTagStrategy

        public void setConsumerTagStrategy​(ConsumerTagStrategy consumerTagStrategy)
        Set the implementation of ConsumerTagStrategy to generate consumer tags. By default, the RabbitMQ server generates consumer tags.
        Parameters:
        consumerTagStrategy - the consumerTagStrategy to set.
        Since:
        1.4.5

      • getConsumerTagStrategy

        @Nullable
protected ConsumerTagStrategy getConsumerTagStrategy()
        Return the consumer tag strategy to use.
        Returns:
        the strategy.
        Since:
        2.0

      • setConsumerArguments

        public void setConsumerArguments​(Map<String,​Object> args)
        Set consumer arguments.
        Parameters:
        args - the arguments.
        Since:
        1.3

      • getConsumerArguments

        public Map<String,​Object> getConsumerArguments()
        Return the consumer arguments.
        Returns:
        the arguments.
        Since:
        2.0

      • setExclusive

        public void setExclusive​(boolean exclusive)
        Set to true for an exclusive consumer.
        Parameters:
        exclusive - true for an exclusive consumer.

      • isExclusive

        protected boolean isExclusive()
        Return whether the consumers should be exclusive.
        Returns:
        true for exclusive consumers.

      • setNoLocal

        public void setNoLocal​(boolean noLocal)
        Set to true for an no-local consumer.
        Parameters:
        noLocal - true for an no-local consumer.

      • isNoLocal

        protected boolean isNoLocal()
        Return whether the consumers should be no-local.
        Returns:
        true for no-local consumers.

      • setDefaultRequeueRejected

        public void setDefaultRequeueRejected​(boolean defaultRequeueRejected)
        Set the default behavior when a message is rejected, for example because the listener threw an exception. When true, messages will be requeued, when false, they will not. For versions of Rabbit that support dead-lettering, the message must not be requeued in order to be sent to the dead letter exchange. Setting to false causes all rejections to not be requeued. When true, the default can be overridden by the listener throwing an AmqpRejectAndDontRequeueException. Default true.
        Parameters:
        defaultRequeueRejected - true to reject by default.

      • isDefaultRequeueRejected

        protected boolean isDefaultRequeueRejected()
        Return the default requeue rejected.
        Returns:
        the boolean.
        Since:
        2.0
        See Also:
        setDefaultRequeueRejected(boolean)

      • setPrefetchCount

        public void setPrefetchCount​(int prefetchCount)
        Tell the broker how many messages to send to each consumer in a single request. Often this can be set quite high to improve throughput.
        Parameters:
        prefetchCount - the prefetch count
        See Also:
        Channel.basicQos(int, boolean)

      • getPrefetchCount

        protected int getPrefetchCount()
        Return the prefetch count.
        Returns:
        the count.
        Since:
        2.0

      • setGlobalQos

        public void setGlobalQos​(boolean globalQos)
        Apply prefetchCount to the entire channel.
        Parameters:
        globalQos - true for a channel-wide prefetch.
        Since:
        2.2.17
        See Also:
        Channel.basicQos(int, boolean)

      • isGlobalQos

        protected boolean isGlobalQos()

      • setShutdownTimeout

        public void setShutdownTimeout​(long shutdownTimeout)
        The time to wait for workers in milliseconds after the container is stopped. If any workers are active when the shutdown signal comes they will be allowed to finish processing as long as they can finish within this timeout. Defaults to 5 seconds.
        Parameters:
        shutdownTimeout - the shutdown timeout to set

      • getShutdownTimeout

        protected long getShutdownTimeout()

      • setIdleEventInterval

        public void setIdleEventInterval​(long idleEventInterval)
        How often to emit ListenerContainerIdleEvents in milliseconds.
        Parameters:
        idleEventInterval - the interval.

      • getIdleEventInterval

        protected long getIdleEventInterval()

      • getLastReceive

        protected long getLastReceive()
        Get the time the last message was received - initialized to container start time.
        Returns:
        the time.

      • setTransactionManager

        public void setTransactionManager​(PlatformTransactionManager transactionManager)
        Set the transaction manager to use.
        Parameters:
        transactionManager - the transaction manager.

      • setTransactionAttribute

        public void setTransactionAttribute​(TransactionAttribute transactionAttribute)
        Set the transaction attribute to use when using an external transaction manager.
        Parameters:
        transactionAttribute - the transaction attribute to set

      • setTaskExecutor

        public void setTaskExecutor​(Executor taskExecutor)
        Set a task executor for the container - used to create the consumers not at runtime.
        Parameters:
        taskExecutor - the task executor.

      • getTaskExecutor

        protected Executor getTaskExecutor()

      • setRecoveryInterval

        public void setRecoveryInterval​(long recoveryInterval)
        Specify the interval between recovery attempts, in milliseconds. The default is 5000 ms, that is, 5 seconds.
        Parameters:
        recoveryInterval - The recovery interval.

      • setRecoveryBackOff

        public void setRecoveryBackOff​(BackOff recoveryBackOff)
        Specify the BackOff for interval between recovery attempts. The default is 5000 ms, that is, 5 seconds. With the BackOff you can supply the maxAttempts for recovery before the stop() will be performed.
        Parameters:
        recoveryBackOff - The BackOff to recover.
        Since:
        1.5

      • getRecoveryBackOff

        protected BackOff getRecoveryBackOff()

      • setMessagePropertiesConverter

        public void setMessagePropertiesConverter​(MessagePropertiesConverter messagePropertiesConverter)
        Set the MessagePropertiesConverter for this listener container.
        Parameters:
        messagePropertiesConverter - The properties converter.

      • setAmqpAdmin

        public void setAmqpAdmin​(AmqpAdmin amqpAdmin)
        Set the AmqpAdmin, used to declare any auto-delete queues, bindings etc when the container is started. Only needed if those queues use conditional declaration (have a 'declared-by' attribute). If not specified, an internal admin will be used which will attempt to declare all elements not having a 'declared-by' attribute.
        Parameters:
        amqpAdmin - the AmqpAdmin to use
        Since:
        2.1

      • setMissingQueuesFatal

        public void setMissingQueuesFatal​(boolean missingQueuesFatal)
        If all of the configured queue(s) are not available on the broker, this setting determines whether the condition is fatal. When true, and the queues are missing during startup, the context refresh() will fail.

        When false, the condition is not considered fatal and the container will continue to attempt to start the consumers.

        Parameters:
        missingQueuesFatal - the missingQueuesFatal to set.
        Since:
        1.3.5
        See Also:
        setAutoDeclare(boolean)

      • isMissingQueuesFatal

        protected boolean isMissingQueuesFatal()

      • isMissingQueuesFatalSet

        protected boolean isMissingQueuesFatalSet()

      • setMismatchedQueuesFatal

        public void setMismatchedQueuesFatal​(boolean mismatchedQueuesFatal)
        Prevent the container from starting if any of the queues defined in the context have mismatched arguments (TTL etc). Default false.
        Parameters:
        mismatchedQueuesFatal - true to fail initialization when this condition occurs.
        Since:
        1.6

      • isMismatchedQueuesFatal

        protected boolean isMismatchedQueuesFatal()

      • setPossibleAuthenticationFailureFatal

        public void setPossibleAuthenticationFailureFatal​(boolean possibleAuthenticationFailureFatal)

      • doSetPossibleAuthenticationFailureFatal

        protected final void doSetPossibleAuthenticationFailureFatal​(boolean possibleAuthenticationFailureFatal)

      • isPossibleAuthenticationFailureFatal

        public boolean isPossibleAuthenticationFailureFatal()

      • isPossibleAuthenticationFailureFatalSet

        protected boolean isPossibleAuthenticationFailureFatalSet()

      • isAsyncReplies

        protected boolean isAsyncReplies()

      • setAutoDeclare

        public void setAutoDeclare​(boolean autoDeclare)
        Set to true to automatically declare elements (queues, exchanges, bindings) in the application context during container start().
        Parameters:
        autoDeclare - the boolean flag to indicate an declaration operation.
        Since:
        1.4
        See Also:
        redeclareElementsIfNecessary()

      • isAutoDeclare

        protected boolean isAutoDeclare()

      • setFailedDeclarationRetryInterval

        public void setFailedDeclarationRetryInterval​(long failedDeclarationRetryInterval)
        Set the interval between passive queue declaration attempts in milliseconds.
        Parameters:
        failedDeclarationRetryInterval - the interval, default 5000.
        Since:
        1.3.9

      • getFailedDeclarationRetryInterval

        protected long getFailedDeclarationRetryInterval()

      • isStatefulRetryFatalWithNullMessageId

        protected boolean isStatefulRetryFatalWithNullMessageId()

      • setStatefulRetryFatalWithNullMessageId

        public void setStatefulRetryFatalWithNullMessageId​(boolean statefulRetryFatalWithNullMessageId)
        Set whether a message with a null messageId is fatal for the consumer when using stateful retry. When false, instead of stopping the consumer, the message is rejected and not requeued - it will be discarded or routed to the dead letter queue, if so configured. Default true.
        Parameters:
        statefulRetryFatalWithNullMessageId - true for fatal.
        Since:
        2.0

      • setExclusiveConsumerExceptionLogger

        public void setExclusiveConsumerExceptionLogger​(ConditionalExceptionLogger exclusiveConsumerExceptionLogger)
        Set a ConditionalExceptionLogger for logging exclusive consumer failures. The default is to log such failures at WARN level.
        Parameters:
        exclusiveConsumerExceptionLogger - the conditional exception logger.
        Since:
        1.5

      • setAlwaysRequeueWithTxManagerRollback

        public void setAlwaysRequeueWithTxManagerRollback​(boolean alwaysRequeueWithTxManagerRollback)
        Set to true to always requeue on transaction rollback with an external TransactionManager. With earlier releases, when a transaction manager was configured, a transaction rollback always requeued the message. This was inconsistent with local transactions where the normal defaultRequeueRejected and AmqpRejectAndDontRequeueException logic was honored to determine whether the message was requeued. RabbitMQ does not consider the message delivery to be part of the transaction. This boolean was introduced in 1.7.1, set to true by default, to be consistent with previous behavior. Starting with version 2.0, it is false by default.
        Parameters:
        alwaysRequeueWithTxManagerRollback - true to always requeue on rollback.
        Since:
        1.7.1.

      • isAlwaysRequeueWithTxManagerRollback

        protected boolean isAlwaysRequeueWithTxManagerRollback()

      • setErrorHandlerLoggerName

        public void setErrorHandlerLoggerName​(String errorHandlerLoggerName)
        Set the name (category) of the logger used to log exceptions thrown by the error handler. It defaults to the container's logger but can be overridden if you want it to log at a different level to the container. Such exceptions are logged at the ERROR level.
        Parameters:
        errorHandlerLoggerName - the logger name.
        Since:
        2.0.8

      • setMicrometerTags

        public void setMicrometerTags​(Map<String,​String> tags)
        Set additional tags for the Micrometer listener timers.
        Parameters:
        tags - the tags.
        Since:
        2.2

      • setMicrometerEnabled

        public void setMicrometerEnabled​(boolean micrometerEnabled)
        Set to false to disable micrometer listener timers.
        Parameters:
        micrometerEnabled - false to disable.
        Since:
        2.2

      • getConsumeDelay

        protected long getConsumeDelay()
        Get the consumeDelay - a time to wait before consuming in ms.
        Returns:
        the consume delay.
        Since:
        2.3

      • setConsumeDelay

        public void setConsumeDelay​(long consumeDelay)
        Set the consumeDelay - a time to wait before consuming in ms. This is useful when using the sharding plugin with concurrency > 1, to avoid uneven distribution of consumers across the shards. See the plugin README for more information.
        Parameters:
        consumeDelay - the consume delay.
        Since:
        2.3

      • setjavaLangErrorHandler

        public void setjavaLangErrorHandler​(AbstractMessageListenerContainer.JavaLangErrorHandler javaLangErrorHandler)
        Provide a JavaLangErrorHandler implementation; by default, System.exit(99) is called.
        Parameters:
        javaLangErrorHandler - the handler.
        Since:
        2.2.12

      • validateConfiguration

        protected void validateConfiguration()
        Validate the configuration of this container.

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

      • initializeProxy

        protected void initializeProxy​(Object delegate)

      • initialize

        public void initialize()
        Initialize this container.

        Creates a Rabbit Connection and calls doInitialize().

      • shutdown

        public void shutdown()
        Stop the shared Connection, call doShutdown(), and close this container.

      • doInitialize

        protected abstract void doInitialize()
        Register any invokers within this container.

        Subclasses need to implement this method for their specific invoker management process.

      • doShutdown

        protected abstract void doShutdown()
        Close the registered invokers.

        Subclasses need to implement this method for their specific invoker management process.

        A shared Rabbit Connection, if any, will automatically be closed afterwards.

        See Also:
        shutdown()

      • isActive

        public final boolean isActive()
        Returns:
        Whether this container is currently active, that is, whether it has been set up but not shut down yet.

      • start

        public void start()
        Start this container.
        Specified by:
        start in interface Lifecycle
        See Also:
        doStart()

      • doStart

        protected void doStart()
        Start this container, and notify all invoker tasks.

      • doStop

        protected void doStop()
        This method is invoked when the container is stopping.

      • isRunning

        public final boolean isRunning()
        Determine whether this container is currently running, that is, whether it has been started and not stopped yet.
        Specified by:
        isRunning in interface Lifecycle
        See Also:
        start(), stop()

      • invokeListener

        protected void invokeListener​(com.rabbitmq.client.Channel channel,
                              Object data)

      • actualInvokeListener

        protected void actualInvokeListener​(com.rabbitmq.client.Channel channel,
                                    Object data)
        Invoke the specified listener: either as standard MessageListener or (preferably) as SessionAwareMessageListener.
        Parameters:
        channel - the Rabbit Channel to operate on
        data - the received Rabbit Message or List of Message.
        See Also:
        setMessageListener(MessageListener)

      • doInvokeListener

        protected void doInvokeListener​(ChannelAwareMessageListener listener,
                                com.rabbitmq.client.Channel channel,
                                Object data)
        Invoke the specified listener as Spring ChannelAwareMessageListener, exposing a new Rabbit Session (potentially with its own transaction) to the listener if demanded. An exception thrown from the listener will be wrapped in a ListenerExecutionFailedException.
        Parameters:
        listener - the Spring ChannelAwareMessageListener to invoke
        channel - the Rabbit Channel to operate on
        data - the received Rabbit Message or List of Message.
        See Also:
        ChannelAwareMessageListener, setExposeListenerChannel(boolean)

      • isChannelLocallyTransacted

        protected boolean isChannelLocallyTransacted()
        Check whether the given Channel is locally transacted, that is, whether its transaction is managed by this listener container's Channel handling and not by an external transaction coordinator.

        Note:This method is about finding out whether the Channel's transaction is local or externally coordinated.

        Returns:
        whether the given Channel is locally transacted
        See Also:
        RabbitAccessor.isChannelTransacted()

      • handleListenerException

        protected void handleListenerException​(Throwable ex)
        Handle the given exception that arose during listener execution.

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

        Parameters:
        ex - the exception to handle

      • publishConsumerFailedEvent

        protected void publishConsumerFailedEvent​(String reason,
                                          boolean fatal,
                                          @Nullable
                                          Throwable t)

      • publishMissingQueueEvent

        protected void publishMissingQueueEvent​(String queue)

      • publishIdleContainerEvent

        protected final void publishIdleContainerEvent​(long idleTime)

      • updateLastReceive

        protected void updateLastReceive()

      • configureAdminIfNeeded

        protected void configureAdminIfNeeded()

      • checkMismatchedQueues

        protected void checkMismatchedQueues()

      • lazyLoad

        public void lazyLoad()
        Description copied from interface: MessageListenerContainer
        Do not check for missing or mismatched queues during startup. Used for lazily loaded message listener containers to avoid a deadlock when starting such containers. Applications lazily loading containers should verify the queue configuration before loading the container bean.
        Specified by:
        lazyLoad in interface MessageListenerContainer

      • redeclareElementsIfNecessary

        protected void redeclareElementsIfNecessary()
        Use AmqpAdmin.initialize() to redeclare everything if necessary. Since auto deletion of a queue can cause upstream elements (bindings, exchanges) to be deleted too, everything needs to be redeclared if a queue is missing. Declaration is idempotent so, aside from some network chatter, there is no issue, and we only will do it if we detect our queue is gone.

        In general it makes sense only for the 'auto-delete' or 'expired' queues, but with the server TTL policy we don't have ability to determine 'expiration' option for the queue.

        Starting with version 1.6, if mismatchedQueuesFatal is true, the declarations are always attempted during restart so the listener will fail with a fatal error if mismatches occur.

      • prepareHolderForRollback

        protected void prepareHolderForRollback​(RabbitResourceHolder resourceHolder,
                                        RuntimeException exception)
        A null resource holder is rare, but possible if the transaction attribute caused no transaction to be started (e.g. TransactionDefinition.PROPAGATION_NONE). In that case the delivery tags will have been processed manually.
        Parameters:
        resourceHolder - the bound resource holder (if a transaction is active).
        exception - the exception.