TCP Spring集成-Dispatcher沒有“響應”通道的訂閱者

Question

我正在使用spring集成通過提供一些消息並獲得響應來對服務器進行TCP調用。 我更喜歡使用通道適配器發送和接收批量消息。 我面臨的問題是響應渠道。 獲取“ Dispatcher沒有該頻道的訂閱者”作為響應頻道。 除了響應沒有在響應通道上傳輸之外，其他一切都工作正常。 我可以看到服務器上的握手以及響應和記錄器通道中日志中的響應。 但是之后會拋出異常。 配置設置為：

<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在他的評論中所說，“分派器沒有訂閱者”在這里意味着沒有端點被配置為在dmQueryResponseChannel上接收響應，或者沒有為該端點配置輸入通道的端點，因為其輸入通道尚未啟動。

無論如何，即使解決了這一問題，對於請求/響應方案使用獨立的適配器也很棘手，因為框架無法自動將響應與請求相關聯。 這就是出站網關的用途。 您可以使用協作適配器，但必須自己處理關聯。 如果您使用請求/答復網關來初始化流，那么您將不得不使用諸如tcp-client-server-multiplex示例中探討的技術。 這是因為使用獨立的適配器意味着您將丟失用於將響應返回到網關的replyChannel標頭。

或者，您可以使用無效的返回網關發送請求，並使用<int:outbound-channel-adapter/>以便框架將使用響應進行回調，並且您可以通過編程進行自己的關聯。

Answer 2

配置設置：

<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

這是解決我的問題的代碼：

    @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

如果從客戶端線程調用了clientPositionsGateway ，則沒有理由使用執行程序通道。 如果您進行百萬次循環clientPositionsGateway，請嘗試使用Future網關： http : //docs.spring.io/spring-integration/docs/2.2.5.RELEASE/reference/html/messaging-endpoints-chapter.html#async-gateway和再次：沒有執行者渠道。 而且我看不到在兩個網關上都使用reply-channel原因。 還有一個：您在<tcp:outbound-gateway> <splitter>之前有<splitter> ，但在<tcp:outbound-gateway>之后的<aggregator>在哪里？..在當前情況下，您會從clientPositionsGateway獲得答復，所有其他被刪除，因為TemporaryReplyChannel已關閉。