java Apache Camel：errorHandler 与 onException？
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Apache Camel: errorHandler vs onException?
提问by Keith
What's the difference between:
有什么区别：
<camel:errorHandler id="deadLetterErrorHandler" type="DeadLetterChannel"
deadLetterUri="log:dead">
<camel:camelContext errorHandlerRef="deadLetterErrorHandler">
...
</camel:camelContext>
And:
和：
<onException>
...
</onException>
According to this article, using them both in conjunction is a "powerful combination". How so? What roles do they each individual assume, and how do they complement each other?
根据这篇文章，将两者结合使用是一种“强大的组合”。怎么会这样？他们每个人承担什么角色，他们如何相互补充？
回答by Keith
The errorHandleris used to handle any uncaught Exceptionthat gets thrown during the routing and processing of a message. Conversely, onExceptionis used to handle specific Exceptiontypes when they are thrown. Check out this articleto see how to use onException.
将errorHandler被用来处理任何未捕获Exception该获取消息的路由和处理过程中抛出。相反，onException用于Exception在抛出特定类型时处理它们。查看本文以了解如何使用onException.
回答by SMS Krishnan
If the action you need to perform for each type of exception is different, use onException. It lets you define error handling on a per exception basis.
如果您需要对每种类型的异常执行的操作不同，请使用 onException。它允许您在每个异常的基础上定义错误处理。
onException(xxxException.class).to("activemq:xxxFailed");onException(yyyException.class).to("activemq:yyyFailed");
onException(xxxException.class).to("activemq:xxxFailed");onException(yyyException.class).to("activemq:yyyFailed");
If you just need a generic handler, go with errorHandler. For all type of errors, the same processing will be performed.
如果您只需要一个通用处理程序，请使用 errorHandler。对于所有类型的错误，将执行相同的处理。
