java - 子上下文中的 Spring Integration http 端点不起作用

Question

当我在根上下文中配置 Http 入站 channel 适配器时，它可以工作:

    <int-http:inbound-channel-adapter id="httpInbount" path="test" channel="ch.http.in" />

        <int:channel id="ch.http.in" />

        <int:service-activator input-channel="ch.http.in" output-channel="ch.aggr.obj" ref="httpToObjTransformer" method="transform"></int:service-activator>
        <bean id="httpToObjTransformer" class="com.nevexis.dcard.integration.transformer.HttpToObjTransformer" />

        <int:channel id="ch.aggr.obj">
            <int:queue />
        </int:channel>

但是当我从子上下文加载它时，它没有注册。

 <int:channel id="ch.aggr.obj">
                <int:queue />
            </int:channel>

位于根上下文中，我加载

    <?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:int="http://www.springframework.org/schema/integration"
    xmlns:int-http="http://www.springframework.org/schema/integration/http"
    xsi:schemaLocation="http://www.springframework.org/schema/integration/http http://www.springframework.org/schema/integration/http/spring-integration-http.xsd
        http://www.springframework.org/schema/integration http://www.springframework.org/schema/integration/spring-integration.xsd
        http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">

    <int-http:inbound-channel-adapter id="httpInbount" path="transaction" channel="ch.http.in" />

    <int:channel id="ch.http.in" />

    <int:service-activator input-channel="ch.http.in" output-channel="ch.aggr.obj" ref="httpToObjTransformer" method="transform"></int:service-activator>
    <bean id="httpToObjTransformer" class="com.nevexis.dcard.integration.transformer.HttpToObjTransformer" />
</beans>

作为子GenericXmlApplicationContext。

当子上下文加载时我可以看到

IntegrationRequestMappingHandlerMapping:197 - Mapped "{[/transaction],methods=[GET || POST],params=[],headers=[],consumes=[],produces=[],custom=[]}" onto public abstract void org.springframework.web.HttpRequestHandler.handleRequest(javax.servlet.http.HttpServletRequest,javax.servlet.http.HttpServletResponse) throws javax.servlet.ServletException,java.io.IOException

在日志中，但无法映射http://localhost:8081/transaction。

Answer 1

那是因为DispatcherServlet是在单独的子上下文中定义的，并且看不到 IntegrationRequestMappingHandlerMapping bean 。

任何子上下文都可以从其ancestors中看到bean ，但不能从其他子上下文中获取，并且父上下文无法在您的子上下文中看到 bean。

需要理解为什么要在子上下文中声明集成流。为什么不是 <context:import>对你来说够了吗？