Hey,
That's pretty much how I would understand it was well. Though I'm not setting
the handled option explicitly anywhere in my route builders. To make the
exchange go somewhere else in case of an exception you'd really just have to
specify the deadLetterChannel in the errorHandler of your route builder:
errorHandler(deadLetterChannel(deadLetterQueue));
Optionally you can also define a retry strategy on some exceptions while not on
others:
onException(RecoverableException.class)
.maximumRedeliveries(redeliverable.maximumRedeliveries())
.redeliveryDelay(redeliverable.redeliveryDelay())
.logExhaustedMessageHistory(true)
.retryAttemptedLogLevel(LoggingLevel.WARN)
.useOriginalMessage();
Or whatever fits your use case and requirements.
To get the log output for an exception that isn't specified for the retry (in
the onException configuration) I had to configure my logging properties this
way:
logging:
level:
org:
apache:
camel: ERROR
processor:
DeadLetterChannel: DEBUG
That will print a line in the logs every time something gets dead-lettered due
to an exception that hasn't been handled in the code.
Cheers,
Valdis
-----Original Message-----
From: Wang Yan [mailto:wyan...@gmail.com]
Sent: 06 March 2019 13:17
To: users@camel.apache.org
Subject: DeadLetterChannel handle option
Hello All,
based on below document
if handle =false the message will be propagated to caller when exception
happened if handle=true, the message will not be propagated to caller but
somewhere else as you can define . is my understanding correct?
http://scanmail.trustwave.com/?c=6600&d=2sj_3M0KVwaA2voGn_01oHSf2lEMV672cpA88z2Sww&s=33&u=http%3a%2f%2fcamel%2eapache%2eorg%2fdead-letter-channel%2ehtml
The *DeadLetterChannel* lets you control behaviors including redelivery,
whether to propagate the thrown Exception to the caller (the *handled* option),
and where the (failed) Exchange should now be routed to.
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