Package org.apache.camel.processor.errorhandler

Class DeadLetterChannel

java.lang.Object

org.apache.camel.support.service.BaseService

org.apache.camel.support.service.ServiceSupport

org.apache.camel.support.ChildServiceSupport

org.apache.camel.processor.errorhandler.ErrorHandlerSupport

org.apache.camel.processor.errorhandler.RedeliveryErrorHandler

org.apache.camel.processor.errorhandler.DeadLetterChannel

All Implemented Interfaces:

AutoCloseable, org.apache.camel.AsyncProcessor, org.apache.camel.Navigate<org.apache.camel.Processor>, org.apache.camel.Processor, org.apache.camel.Service, org.apache.camel.ShutdownableService, org.apache.camel.spi.ErrorHandler, org.apache.camel.spi.ErrorHandlerRedeliveryCustomizer, org.apache.camel.spi.ShutdownPrepared, org.apache.camel.StatefulService, org.apache.camel.SuspendableService

public class DeadLetterChannel
extends RedeliveryErrorHandler

Implements a Dead Letter Channel after attempting to redeliver the message using the RedeliveryPolicy

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.camel.processor.errorhandler.RedeliveryErrorHandler

RedeliveryErrorHandler.RedeliveryTask, RedeliveryErrorHandler.SimpleTask

Field Summary

Fields inherited from class org.apache.camel.processor.errorhandler.RedeliveryErrorHandler

awaitManager, camelContext, customExchangeFormatter, deadLetter, deadLetterHandleNewException, deadLetterUri, exchangeFormatter, executorService, logger, onExceptionProcessor, onPrepareProcessor, output, outputAsync, preparingShutdown, reactiveExecutor, redeliveryEnabled, redeliveryPolicy, redeliveryProcessor, redeliverySleepCounter, retryWhilePolicy, shutdownStrategy, simpleTask, taskFactory, useOriginalBodyPolicy, useOriginalMessagePolicy

Fields inherited from class org.apache.camel.processor.errorhandler.ErrorHandlerSupport

DEFAULT_EXCHANGE_FORMATTER, exceptionPolicies, exceptionPolicy

Fields inherited from class org.apache.camel.support.ChildServiceSupport

childServices

Fields inherited from class org.apache.camel.support.service.BaseService

BUILT, FAILED, INITIALIZED, INITIALIZING, lock, NEW, SHUTDOWN, SHUTTING_DOWN, STARTED, STARTING, status, STOPPED, STOPPING, SUSPENDED, SUSPENDING

Constructor Summary

Constructors

Constructor

Description

DeadLetterChannel(org.apache.camel.CamelContext camelContext, org.apache.camel.Processor output, org.apache.camel.spi.CamelLogger logger, org.apache.camel.Processor redeliveryProcessor, RedeliveryPolicy redeliveryPolicy, org.apache.camel.Processor deadLetter, String deadLetterUri, boolean deadLetterHandleException, boolean useOriginalMessagePolicy, boolean useOriginalBodyPolicy, org.apache.camel.Predicate retryWhile, ScheduledExecutorService executorService, org.apache.camel.Processor onPrepareProcessor, org.apache.camel.Processor onExceptionOccurredProcessor)

Creates the dead letter channel.

Method Summary

Modifier and Type	Method	Description
org.apache.camel.spi.ErrorHandler	clone(org.apache.camel.Processor output)	Clones the current error handler and changes the output
boolean	isDeadLetterChannel()	Whether this error handler handles exhausted errors by moving the exchange to a dead letter channel.
protected boolean	isRunAllowedOnPreparingShutdown()
String	toString()

Methods inherited from class org.apache.camel.processor.errorhandler.RedeliveryErrorHandler

changeOutput, defensiveCopyExchangeIfNeeded, determineIfRedeliveryIsEnabled, determineRedeliveryDelay, doShutdown, doStart, doStop, getDeadLetter, getDeadLetterUri, getDefaultHandledPredicate, getLogger, getOutput, getRedeliveryPolicy, hasNext, isDeadLetterHandleNewException, isDone, isUseOriginalBodyPolicy, isUseOriginalMessagePolicy, next, prepareShutdown, process, process, processAsync, supportTransacted

Methods inherited from class org.apache.camel.processor.errorhandler.ErrorHandlerSupport

addErrorHandler, addExceptionPolicy, getExceptionPolicy

Methods inherited from class org.apache.camel.support.ChildServiceSupport

addChildService, removeChildService, shutdown, start, stop

Methods inherited from class org.apache.camel.support.service.BaseService

build, doBuild, doFail, doInit, doLifecycleChange, doResume, doSuspend, fail, getStatus, init, isBuild, isInit, isNew, isRunAllowed, isShutdown, isStarted, isStarting, isStartingOrStarted, isStopped, isStopping, isStoppingOrStopped, isSuspended, isSuspending, isSuspendingOrSuspended, resume, suspend

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.camel.Service

build, close, init

Methods inherited from interface org.apache.camel.StatefulService

getStatus, isRunAllowed, isStarted, isStarting, isStopped, isStopping, isSuspending

Methods inherited from interface org.apache.camel.SuspendableService

isSuspended, resume, suspend

Constructor Detail

DeadLetterChannel

public DeadLetterChannel(org.apache.camel.CamelContext camelContext,
                         org.apache.camel.Processor output,
                         org.apache.camel.spi.CamelLogger logger,
                         org.apache.camel.Processor redeliveryProcessor,
                         RedeliveryPolicy redeliveryPolicy,
                         org.apache.camel.Processor deadLetter,
                         String deadLetterUri,
                         boolean deadLetterHandleException,
                         boolean useOriginalMessagePolicy,
                         boolean useOriginalBodyPolicy,
                         org.apache.camel.Predicate retryWhile,
                         ScheduledExecutorService executorService,
                         org.apache.camel.Processor onPrepareProcessor,
                         org.apache.camel.Processor onExceptionOccurredProcessor)

Creates the dead letter channel.

Parameters:

camelContext - the camel context

output - outer processor that should use this dead letter channel

logger - logger to use for logging failures and redelivery attempts

redeliveryProcessor - an optional processor to run before redelivery attempt

redeliveryPolicy - policy for redelivery

deadLetter - the failure processor to send failed exchanges to

deadLetterUri - an optional uri for logging purpose

deadLetterHandleException - whether dead letter channel should handle (and ignore) exceptions which may be thrown during sending the message to the dead letter endpoint

useOriginalMessagePolicy - should the original IN message be moved to the dead letter queue or the current exchange IN message?

useOriginalBodyPolicy - should the original IN message body be moved to the dead letter queue or the current exchange IN message body?

retryWhile - retry while

executorService - the ScheduledExecutorService to be used for redelivery thread pool. Can be null.

onPrepareProcessor - a custom Processor to prepare the Exchange before handled by the failure processor / dead letter channel.

onExceptionOccurredProcessor - a custom Processor to process the Exchange just after an exception was thrown.

Method Detail

clone

public org.apache.camel.spi.ErrorHandler clone(org.apache.camel.Processor output)

Description copied from class: ErrorHandlerSupport

Clones the current error handler and changes the output

Specified by:

clone in class ErrorHandlerSupport

toString

public String toString()

Overrides:

toString in class Object

isRunAllowedOnPreparingShutdown

protected boolean isRunAllowedOnPreparingShutdown()

Overrides:

isRunAllowedOnPreparingShutdown in class RedeliveryErrorHandler

isDeadLetterChannel

public boolean isDeadLetterChannel()

Description copied from class: ErrorHandlerSupport

Whether this error handler handles exhausted errors by moving the exchange to a dead letter channel.

Overrides:

isDeadLetterChannel in class ErrorHandlerSupport