Autowiring interfaces error

Question

So I have this spring integration project. That use a gateway as a trigger to spring batch jobs. I made this interface for the gateway:

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

Then a java class that triggers the interface:

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();
       }
    }
 }

every time I tried to run it an exception appear:

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

line 22 is: testGateWay.trigger("pass");

my 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>

Start of my 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" />

Any ideas why?

Thanks,
Jet

Answer 1

Since you say that you use Spring Integration, your gateway interface should have 'implementation' - <gateway>

Something like this:

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

Answer 2

You have a typo in your code, which might be a problem:

TestGateway testGateWay

try changing it to

TestGateway testGateway