HttpInvoker inbound gateway : interface invocation throws NoSuchMethodException

[Jérémie]

Hi all,

I try to run a http invoker gateway as a front-end for my spring integration bus. My client application see a Java interface, let's call it ContractService, with a method in this interface called getContract(String id).

When I configure a HttpInvoker Inbound Gateway like this :

<httpinvoker:inbound-gateway id="inboundGateway"
		request-channel="getContractRequestChannel" reply-channel="contractChannel"
		request-timeout="30000" reply-timeout="10000" />

I end up with a NoSuchMethodException exception :

org.springframework.remoting.RemoteInvocationFailureException: Invocation of method [public abstract java.lang.Object org.springframework.integration.gateway.MessagingGateway.sendAndReceive(java.lang.Object)] failed in HTTP invoker remote service at [localhost:8080/MyCompanyBus/inboundGateway]; nested exception is java.lang.NoSuchMethodException: $Proxy2.sendAndReceive(java.lang.Object)
	at org.springframework.remoting.httpinvoker.HttpInvokerClientInterceptor.invoke(HttpInvokerClientInterceptor.java:154)

Normal, you would say, as I define nowhere the ContractService interface...
I tried to replace, from the client point of view, the ContractService interface with the org.springframework.integration.gateway.MessagingG ateway and invoke the sendAndReceive(Object) method, as the gateway implement that interface, and I end up with the same exception.

The only way I succeed is when defining an HttpInvokerServiceExporter with the business interface :

<beans:bean name="inboundGateway" class="org.springframework.remoting.httpinvoker.HttpInvokerServiceExporter">
		<beans:property name="service" ref="contractServiceGateway"/>
		<beans:property name="serviceInterface" value="com.mycompany.bus.service.ContractService"/>
	</beans:bean>

And to redirect internally into a SimpleMessagingGateway.

So what is the correct way to use the HttpInvokerGateway ? why do I receive the NoSuchMethodException ?

Thanks for your help,

Jérémie Grodziski.

P.S : the client configuration is right, as the exception is thrown from the server side.

[Mark Fisher]

Can you please show your client side configuration?

[Jérémie]

Here is the beans.xml config :

<bean id="contractService" class="org.springframework.remoting.httpinvoker.HttpInvokerProxyFactoryBean">
<property name="serviceUrl" value="httpsemicolon//localhost:8080/MyCompanyBus/inboundGateway"/>
<property name="serviceInterface" value="com.mycompany.bus.service.ContractService"/>
</bean>

The java part is a classic :

public static void main(String[] args) throws Exception{
		ApplicationContext ctx = new ClassPathXmlApplicationContext("classpath:beans-test.xml");
		ContractService contract = (ContractService)ctx.getBean("contractService");
		contract.getContract(new GetContractRequest("1","1"));

I precise that replacing the server side spring conf with a HttpInvokerServiceExporter instead of the gateway makes things work perfectly. I also precise that I ran the client part inside and outside Eclipse that run the tomcat server to eliminate the eclipse role in some classloading problem.

Thanks.

Jérémie Grodziski.

[Mark Fisher]

OK. I see what's happening now. You should use the HttpInvokerOutboundGateway on the client side. That will expect the same interface that is exposed by the inbound-gateway.

The schema-based configuration will be similar to this:

<httpinvoker:outbound-gateway id="outboundGateway"
                              url="http://localhost:8080/test"
                              request-channel="testChannel"/>