Question

我正在使用spring集成通过提供一些消息并获得响应来对服务器进行TCP调用。我更喜欢使用通道适配器来发送和接收批量消息。我面临的问题是响应通道。获取“Dispatcher没有频道订阅者”的响应频道。一切都工作正常，除了没有在响应渠道上传输的响应。我可以看到服务器上的握手以及日志中的响应被放在响应和记录器通道上。但在抛出异常之后。配置设置为：

<gateway id="clientPositionsGateway" service-interface="MyGatewayInterface">
        <method name="fetchClientPositions" request-channel="clientPositionsRequestChannel" />  
    </gateway>


    <channel id="clientPositionsRequestChannel" />

    <splitter input-channel="clientPositionsRequestChannel"
            output-channel="singleClientPositionsRequestChannel" />

    <channel id = "singleClientPositionsRequestChannel" />

    <transformer
        input-channel="singleClientPositionsRequestChannel"
        output-channel="dmQueryRequestChannel"
        ref="dmPosBaseQueryTransformer" />

    <channel id = "dmQueryRequestChannel">
        <!-- <dispatcher task-executor="executor"/> -->
    </channel>

    <ip:tcp-connection-factory id="csClient"
           type="client"
           host="somehost"
           port="12345"
           single-use="true"
           deserializer="connectionSerializeDeserialize"
            />

    <ip:tcp-outbound-channel-adapter id="dmServerOutboundAdapter"
            channel="dmQueryRequestChannel"
            connection-factory="csClient"
            order="2"
            />

    <ip:tcp-inbound-channel-adapter id="dmServerInboundAdapter"
            channel="dmQueryResponseChannel"
            connection-factory="csClient"
            error-channel="errorChannel"/>

<channel id="dmQueryResponseChannel"/>

Answer 1

正如Artem在他的评论中所说，'Dispatcher没有订阅者'在这里意味着没有端点被配置为在dmQueryResponseChannel上接收响应，或者由于其输入通道未启动而配置有该通道的端点。

在任何情况下，即使您解决了这个问题，使用独立适配器进行请求/响应方案也很棘手，因为框架无法自动将响应与请求相关联。这就是出站网关的用途。您可以使用协作适配器，但您必须自己处理关联。如果您使用请求/回复网关来启动流程，则必须使用tcp-client-server-multiplex sample中探讨的技术。这是因为使用独立适配器意味着您将丢失用于将响应返回到网关的replyChannel标头。

或者，您可以使用void返回网关发送请求，并使用<int:outbound-channel-adapter/>框架将回调响应，您可以通过编程方式进行自己的关联。

Answer 2

配置设置：

<gateway id="clientPositionsGateway" service-interface="com.example.ClientPositionsGateway">
    <method name="fetchClientPositions" request-channel="clientPositionsRequestChannel"  reply-channel="dmQueryResponseChannel"/>  
</gateway>

<channel id="clientPositionsRequestChannel" />

<splitter input-channel="clientPositionsRequestChannel"
        output-channel="singleClientPositionsRequestChannel" />

<channel id = "singleClientPositionsRequestChannel" />

<transformer
    input-channel="singleClientPositionsRequestChannel"
    output-channel="dmQueryRequestChannel"
    ref="dmPosBaseQueryTransformer" />

<logging-channel-adapter channel="clientBytes2StringChannel"/>  

<channel id = "dmQueryRequestChannel">
     <dispatcher task-executor="executor"/> 
</channel>

<ip:tcp-connection-factory id="csClient" 
       type="client" 
       host="serverHost"
       port="22010"
       single-use="true"
       deserializer="connectionSerializeDeserialize"
       />

<ip:tcp-outbound-channel-adapter id="dmServerOutboundAdapter"
        channel="dmQueryRequestChannel" 
        connection-factory="csClient"
        /> 

<ip:tcp-inbound-channel-adapter id="dmServerInboundAdapter"
        channel="dmQueryResponseChannel" 
        connection-factory="csClient" 
        error-channel="errorChannel"/>

<transformer input-channel="dmQueryResponseChannel" output-channel="clientBytes2StringChannel" ref="dmPOSBaseQueryResponseTransformer"
        />

<channel id="dmQueryResponseChannel"/>

<channel id="clientBytes2StringChannel"/>

Answer 3

public interface ClientPositionsGateway {

    String fetchClientPositions(List<String> clientList); 

}

Answer 4

这是解决我的问题的代码：

    @ContextConfiguration(locations={"/clientGIM2Position.xml"})
    @RunWith(SpringJUnit4ClassRunner.class)

    public class GetClientPositionsTest {

    @Autowired

    ClientPositionsGateway clientPositionsGateway;

    @Test

    public void testGetPositions() throws Exception {

    String positions = clientPositionsGateway.fetchClientPositions(clientList);

    System.out.println("returned !!!!" + positions);

           }
    }

Answer 5

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

    <!-- intercept and log every message -->

    <logging-channel-adapter id="logger" level="DEBUG" />
    <wire-tap channel = "logger" />

    <gateway id="clientPositionsGateway"
         service-interface="com.example.ClientPositionsGateway">
        <method name="fetchClientPositions" request-channel="clientPositionsRequestChannel" reply-channel="dmQueryResponseChannel"/>
    </gateway>

    <channel id="clientPositionsRequestChannel" />

    <splitter input-channel="clientPositionsRequestChannel"
            output-channel="singleClientPositionsRequestChannel" />

    <channel id = "singleClientPositionsRequestChannel" />

    <transformer
        input-channel="singleClientPositionsRequestChannel"
        output-channel="dmQueryRequestChannel"
        ref="dmPosBaseTransQueryTransformer" />

    <channel id = "dmQueryRequestChannel">
        <dispatcher task-executor="executor"/>
    </channel>

    <ip:tcp-connection-factory id="csClient" 
           type="client" 
           host="hostserver"
           port="22010"
           single-use="true"
           deserializer="connectionSerializeDeserialize"
           />

    <ip:tcp-outbound-gateway id="dmServerGateway" 
           request-channel="dmQueryRequestChannel" 
           reply-channel="dmQueryResponseChannel"
           connection-factory="csClient"  />

    <channel id="dmQueryResponseChannel">
        <dispatcher task-executor="executor"/>
    </channel>

    <channel id="serverBytes2StringChannel" />

    <bean id="connectionSerializeDeserialize" class="com.example.DMQueryResponseSerializer"/>
    <bean id="dmPosBaseTransQueryTransformer" class="com.example.DMPOSBaseTransQueryTransformer"/> 
    <task:executor id="executor" pool-size="5"/>

</beans:beans>

Answer 6

如果从客户端线程调用 clientPositionsGateway ，则没有理由使用执行程序通道。如果你做百万循环 clientPositionsGateway 尝试使用Future gateway：http://docs.spring.io/spring-integration/docs/2.2.5.RELEASE/reference/html/messaging-endpoints-chapter.html#async-gateway并再次：没有执行器通道。我没有理由在两个网关上使用reply-channel。还有一项：您<splitter>之前<tcp:outbound-gateway>，<aggregator>之后<tcp:outbound-gateway>在哪里？在您目前的情况下，您会收到 clientPositionsGateway 的回复，其他所有内容都将被删除，因为 TemporaryReplyChannel 已经关闭。

TCP Spring Integration - Dispatcher没有“响应”频道的订阅者

6 个答案: