Spring5升级后Spring Integration配置报错：int:filter属性及子元素异常

原配置代码 #

<int:filter id="xpathfilter" input-channel="eventSpringXpathChannel"
    output-channel="eventSpringOutChannel" discard-channel="eventSpringFailureChannel"
    expression="#xpath(payload, headers.get('xpathKey'), 'boolean')">
    <int:request-handler-advice-chain>
        <bean
            class="org.springframework.integration.handler.advice.ExpressionEvaluatingRequestHandlerAdvice">
            <property name="onFailureExpressionString" value="payload" />
            <property name="failureChannel" ref="eventSpringXpathErrorChannel" />
            <property name="trapException" value="true" />
        </bean>
    </int:request-handler-advice-chain>
</int:filter>

错误信息（翻译后） #

1. cvc-complex-type.3.2.2: 元素'int:filter'中不允许出现属性'expression'
2. 无效元素名称：

• request-handler-advice-chain
  预期为以下元素之一：
• bean
• poller

修复方案 #

针对错误1调整表达式配置 #

Spring Integration 5.x中，<int:filter>不再支持直接配置expression属性，需要将过滤表达式移至<int:expression>子元素中定义。

针对错误2调整增强链配置 #

<int:request-handler-advice-chain>已不是<int:filter>的合法子元素，需替换为<int:advice-chain>来配置处理器增强逻辑。

修复后完整配置 #

<int:filter id="xpathfilter" input-channel="eventSpringXpathChannel"
    output-channel="eventSpringOutChannel" discard-channel="eventSpringFailureChannel">
    <int:expression>#xpath(payload, headers.get('xpathKey'), 'boolean')</int:expression>
    <int:advice-chain>
        <bean
            class="org.springframework.integration.handler.advice.ExpressionEvaluatingRequestHandlerAdvice">
            <property name="onFailureExpressionString" value="payload" />
            <property name="failureChannel" ref="eventSpringXpathErrorChannel" />
            <property name="trapException" value="true" />
        </bean>
    </int:advice-chain>
</int:filter>

补充说明 #

确保配置文件头部的Spring Integration命名空间引用已升级至Spring 5对应的版本：

xmlns:int="http://www.springframework.org/schema/integration"
xsi:schemaLocation="http://www.springframework.org/schema/integration
    https://www.springframework.org/schema/integration/spring-integration.xsd"

内容的提问来源于stack exchange，提问作者VKR