Question

我有一个骡子流，我配置了请求回复范围。流程如下：

<flow name="RequestReplyFlow">
    <http:listener config-ref="HTTP_Listener_Configuration" path="/test" doc:name="HTTP" />
    <set-payload value="#['Sample Payload']" doc:name="Set Payload" />
    <request-reply doc:name="Request-Reply">
        <vm:outbound-endpoint exchange-pattern="one-way" path="request" doc:name="VM" />
        <vm:inbound-endpoint exchange-pattern="one-way" path="reply" doc:name="VM" />
    </request-reply>
</flow>

和

<flow name="RequestReplyFlow1">
    <vm:inbound-endpoint exchange-pattern="one-way" path="request" doc:name="VM" />
    <logger message="Executing with payload: #[payload]" level="INFO" doc:name="Logger" />
    <component class="org.ram.BusinessComponent" doc:name="Java" />
    <rollback-exception-strategy maxRedeliveryAttempts="5" doc:name="Rollback Exception Strategy">
        <logger message="Will attempt redelivery" level="INFO" doc:name="Logger" />
    </rollback-exception-strategy>
</flow>

我在rollback-exception-strategy VM入站端点上配置request。

当组件org.ram.BusinessComponent抛出异常时，我所期望的是将消息重新传递到入站VM端点，但它没有发生。为什么？

有人可以解决这个问题吗？

Answer 1

如果您使用回滚异常策略而不是unhandled exceptions的默认异常策略，那么您只需在＆＃34; rollback-exception-strategy＆＃34;中手动指定重定向。通过添加＆＃34; vm：outbound-endpoint＆＃34;使用＆＃34;回复＃34;路径，请注意maxRedeliveryAttempts已更改为＆＃34; 0＆＃34;因为你的虚拟机不是交易的：

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当vm为transactional时，值maxRedeliveryAttempts = 5是有意义的，因为在这种情况下，Mule会尝试重新发送消息五（5）次。然后，您可以在＆＃34; rollback-exception-strategy＆＃34;中手动指定重定向。通过添加＆＃34; vm：outbound-endpoint＆＃34;使用＆＃34;回复＃34; ＆＃34; on-redelivery-attempts-exceeded＆＃34;子元素：

<flow name="RequestReplyFlow1">
    <vm:inbound-endpoint exchange-pattern="one-way" path="request" doc:name="VM" />
    <logger message="Executing with payload: #[payload]" level="INFO" doc:name="Logger" />
    <component class="org.ram.BusinessComponent" doc:name="Java" />
    <rollback-exception-strategy maxRedeliveryAttempts="0" doc:name="Rollback Exception Strategy">
        <logger message="Will attempt redelivery" level="INFO" doc:name="Logger" />
        <vm:outbound-endpoint exchange-pattern="one-way" path="reply" doc:name="VM" />
    </rollback-exception-strategy>
</flow>

骡子请求回复和回滚例外策略

1 个答案: