Question

我在链组件中有以下Spring组合代码：

<int:chain input-channel="PQIssueDetails-PQMemberSearchMemAltID-Request" output-channel="PQIssueDetails-PQMemberSearchRequest-CheckLegacySystem">
        <!-- Transformer to transform the resultXml to the user understandable form using XSLT -->
        <int-xml:xslt-transformer xsl-resource="${stylesheet.PQIssueDetailsPQMemberSearchMemAltIDRequest}"/>
        <!-- Store the original payload in header for future purpose -->
        <int:header-enricher default-overwrite="true" should-skip-nulls="true">
            <int:header name="${headerNames.originalPayload}" expression="payload"/>
        </int:header-enricher>
        <!-- Store the original payload in header for future purpose -->
        <int-xml:xpath-header-enricher default-overwrite="true" id="ToWorkForMembSearch" should-skip-nulls="true">
            <int-xml:header name="legacySystem" evaluation-type="STRING_RESULT" overwrite="true" xpath-expression="//MemberSearch/LegacySystem"/>
            <int-xml:header name="businessArea" evaluation-type="STRING_RESULT" overwrite="true" xpath-expression="//MemberSearch/businessArea"/>
        </int-xml:xpath-header-enricher>
    </int:chain>

在一个场景中，转换后的xml如下：

<?xml version="1.0" encoding="UTF-8"?>

由于有效负载没有有效的xml字符串，xpath-header-enricher抛出以下异常：

org.springframework.integration.MessagingException: failed to transform message headers
2016-02-16 12:34:54,431 WARN  http-0.0.0.0-8080-3 [org.springframework.integration.http.inbound.HttpRequestHandlingMessagingGateway] failure occurred in gateway sendAndReceive
org.springframework.integration.MessageDeliveryException: no channel resolved by router and no default output channel defined

如果将无效的xml传递给xpath-expression，如何使用xpath-header-enricher处理此方案。

简而言之，不应该停止执行流程，即使传递了无效的xml内容，也不应该抛出异常。

关于我所面临的问题的任何想法？

Answer 1

不应停止执行流程

将标题扩展出链并通过网关调用它，并使用error-channel来处理错误：

<int:chain input-channel="PQIssueDetails-PQMemberSearchMemAltID-Request" output-channel="PQIssueDetails-PQMemberSearchRequest-CheckLegacySystem">
    ...
    <int:gateway request-channel="enrich" error-channel="enrichErrors"/>
</int:chain>

    <int-xml:xpath-header-enricher input-channel="enrich"
         default-overwrite="true" id="ToWorkForMembSearch" should-skip-nulls="true">
        <int-xml:header name="legacySystem" evaluation-type="STRING_RESULT" overwrite="true" xpath-expression="//MemberSearch/LegacySystem"/>
        <int-xml:header name="businessArea" evaluation-type="STRING_RESULT" overwrite="true" xpath-expression="//MemberSearch/businessArea"/>
    </int-xml:xpath-header-enricher>

当变压器成功时，消息将转到链中的下一个元素;如果它引发异常，带有ErrorMessage和MessagingException属性的有效负载（failedMessage）的cause将转到错误通道;如果该通道上的流返回结果，它将转到链中的下一个元素。

如何在xpath-header-enricher中处理无效的xml内容

1 个答案: