Question

所以我有这个Spring集成项目。这使用网关作为弹出批处理作业的触发器。我为网关创建了这个接口：

public interface TestGateway {
    void trigger(String pass);
}

然后是一个触发接口的java类：

public class Trigger implements Runnable {

@Autowired
TestGateway testGateWay;

public void triggerMethod() {

    testGateWay.trigger("pass");
}

@Override
public void run() {
    try {
        triggerMethod();
    } catch (Exception e) {
        e.printStackTrace();
       }
    }
 }

每次我试图运行它时都会出现异常：

java.lang.NullPointerException
at com.irsis.integration.endpoint.Trigger.triggerMethod(Trigger.java:12)
at com.irsis.integration.endpoint.Trigger.run(Trigger.java:18)
at org.springframework.scheduling.support.DelegatingErrorHandling

第22行是：testGateWay.trigger("pass");

我的integration-context.xml

    <context:component-scan base-package="com.irsis.integration.endpoint" />

<int:logging-channel-adapter id="logger"
    log-full-message="true" level="INFO" />

<!-- gateway -->
<int:channel id="testInput" />

<int:gateway id="testGateway"
    service-interface="com.irsis.integration.endpoint.TestGateway">
    <int:method name="trigger" request-channel="testInput" />
</int:gateway>

<int:channel id="activate" />

<import resource="classpath*:/spring/batch/jobs/testJob.xml" />

<int:transformer input-channel="testInput"
    output-channel="activate">
    <bean class="com.irsis.integration.util.TriggerToJobRequest">
        <property name="job" ref="testJob" />
    </bean>
</int:transformer>



<int:service-activator method="launch"
    input-channel="activate">
    <bean id="messageHandler"
        class="org.springframework.batch.integration.launch.JobLaunchingMessageHandler">
        <constructor-arg ref="jobLauncher" />
    </bean>
</int:service-activator>

启动我的application-context.xml

<context:annotation-config />
<context:spring-configured />

<import resource="classpath*:/spring/integration/si-batch-config.xml" />
    <import resource="classpath*:/spring/integration/si-test2.xml" />


<context:component-scan base-package="com.irsis" />

任何想法为什么？

谢谢，
喷射

Answer 1

由于您说您使用的是Spring Integration，因此您的网关接口应该具有“实施”功能。 - <gateway>

这样的事情：

<gateway id="testGateway" service-interface="com.my.proj.TestGateway" 
          default-request-channel="gatewayChannel"/>

Answer 2

您的代码中存在拼写错误，这可能是个问题：

TestGateway testGateWay

尝试将其更改为

TestGateway testGateway

自动装配接口错误

2 个答案: