Question

我试图将inputMessage有效负载包含在错误中，但它似乎永远不会被传递，并且丰富似乎也无法正常工作。

我有一个目录轮询服务：

<file:inbound-channel-adapter
        id="incomingFiles"
        auto-startup="true"
        auto-create-directory="false"
        channel="myFiles"
        filename-pattern="${directory.local.pattern}"
        directory="file:${directory.local}">
    <int:poller id="poller" fixed-delay="${directory.local.poll}"/>
</file:inbound-channel-adapter>

然后通过SFTP上传这些文件：

<sftp:outbound-channel-adapter
        id="sftpOutboundAdapter"
        channel="myFiles"
        charset="UTF-8"
        remote-directory="${directory.remote}"
        session-factory="sftpSessionFactory">
    <sftp:request-handler-advice-chain>
        <bean class="org.springframework.integration.handler.advice.ExpressionEvaluatingRequestHandlerAdvice">
            <property name="onSuccessExpression" value="payload.delete()"/>
            <property name="successChannel" ref="successChannel"/>
            <property name="onFailureExpression" value="payload.renameTo(payload.absolutePath + '.error')"/>
            <property name="failureChannel" ref="failChannel" />
        </bean>
    </sftp:request-handler-advice-chain>
</sftp:outbound-channel-adapter>

在成功频道上，我记录并发送并通过successChannel发送，其他服务选择并发送电子邮件，这100％工作：

    <!-- Log Channel -->
    <int:logging-channel-adapter id="logChannel" level="INFO"/>

    <!-- Success Endpoint -->
    <int:channel id="successChannel">
        <int:interceptors>
            <int:wire-tap channel="successLogChannel"/>
        </int:interceptors>
    </int:channel>

    <!-- Success Logging -->
    <int:channel id="successLogChannel"/>
    <int:transformer
            input-channel="successLogChannel"
            output-channel="logChannel"
            expression="'Successfully transferred ' + inputMessage.payload.absolutePath"/>

    <!-- Send success email -->
    <int:chain input-channel="successChannel">
        <int:header-enricher>
            <int:header name="to" value="${success.email.to}"/>
            <int:header name="from" value="${success.email.from}" />
            <int:header name="subject" value="${success.email.subject}"/>
            <int:header name="filename" expression="inputMessage.payload.absolutePath"/>
        </int:header-enricher>
        <int:service-activator ref="Email" method="sendSuccessMail"/>
    </int:chain>

org.springframework.integration.handler.LoggingHandler - 成功转移/tmp/test-file.dat

现在当我为错误尝试完全相同的事情时，表达式inputMessage.payload.filename无法评估。

    <!-- Fail Endpoint -->
    <int:channel id="failChannel">
        <int:interceptors>
            <int:wire-tap channel="failLogChannel"/>
        </int:interceptors>
    </int:channel>

    <!-- Fail Logging -->
    <int:channel id="failLogChannel"/>
    <int:transformer
            input-channel="failLogChannel"
            output-channel="logChannel"
            expression="'Failed to transfer ' + inputMessage.payload.absolutePath"/>

    <!-- Send fail email -->
    <int:chain input-channel="failChannel">
        <int:header-enricher>
            <int:header name="to" value="${fail.email.to}"/>
            <int:header name="from" value="${fail.email.from}" />
            <int:header name="subject" value="${fail.email.subject}"/>
            <int:header name="filename" expression="inputMessage.payload.absolutePath"/>
        </int:header-enricher>
        <int:service-activator ref="Email" method="sendFailMail"/>
    </int:chain>

错误org.springframework.integration.handler.LoggingHandler - org.springframework.integration.transformer.MessageTransformationException： org.springframework.integration.MessageHandlingException：Expression 评估失败：＆＃39;无法转移＆＃39; + inputMessage.payload.absolutePath

我尝试添加一个标头扩充程序，但是当出现错误时，似乎有效负载永远不会超出SFTP出站通道：

    <!-- Fail Endpoint -->
    <int:channel id="failChannel"/>
    <int:chain input-channel="failChannel" output-channel="failChannelEnriched">
        <int:header-enricher>
            <int:header name="to" value="${fail.email.to}"/>
            <int:header name="from" value="${fail.email.from}"/>
            <int:header name="subject" value="${fail.email.subject}"/>
            <int:header name="filename" expression="inputMessage.payload.absolutePath"/>
        </int:header-enricher>
    </int:chain>


    <int:channel id="failChannelEnriched">
        <int:interceptors>
            <int:wire-tap channel="failLogChannel"/>
        </int:interceptors>
    </int:channel>

    <!-- Fail Logging -->
    <int:channel id="failLogChannel"/>
    <int:transformer
            input-channel="failLogChannel"
            output-channel="logChannel"
            expression="'Failed to transfer ' + headers['filename']"/>

    <!-- Send fail email -->
    <int:chain input-channel="failChannelEnriched">
        <int:service-activator ref="Email" method="sendFailMail"/>
    </int:chain>

错误org.springframework.integration.handler.LoggingHandler -   org.springframework.integration.transformer.MessageTransformationException：   org.springframework.integration.MessagingException：失败了   转换邮件标题

...

引起：   org.springframework.expression.spel.SpelEvaluationException：   EL1008E：（pos 0）：字段或属性＆＃39; inputMessage＆＃39;无法找到   类型＆＃39; org.springframework.integration.message.ErrorMessage＆＃39;

at org.springframework.expression.spel.ast.PropertyOrFieldReference.readProperty（PropertyOrFieldReference.java:246）

查看spring文档，我可以看到org.springframework.integration.message.ErrorMessage确实接受了标题，但不知怎的，它只是没有被设置。

有什么建议吗？

Answer 1

为了成功，会向频道发送特殊AdviceMessage;这具有inputMessage属性（有效负载是表达式求值的结果）。

对于错误情况，正常ErrorMessage被发送到频道;它的有效载荷是具有正常属性的MessagingException：cause（发生的例外情况）和failedMessage。

实际例外是MessageHandlingExpressionEvaluatingAdviceException，其中包含表达式评估结果的附加属性evaluationResult。

因此，您需要为失败案例payload.failedMessage.payload.absolutePath使用不同的表达式。

Spring Integration - 包括错误中的有效负载

1 个答案: