Agfdhyk

I have the gRPC server code as below:

public void buildServer() { 

  List<BindableService> theServiceList = new ArrayList<BindableService>(); 

  theServiceList.add(new CreateModuleContentService()); 

  theServiceList.add(new RemoveModuleContentService()); 



  ServerBuilder<?> sb = ServerBuilder.forPort(m_port); 

  for (BindableService aService : theServiceList) { 

    sb.addService(aService); 

  } 

  m_server = sb.build(); 

}

and client code as below:

public class JavaMainClass {

    public static void main(String args) {

        CreateModuleService createModuleService = new CreateModuleService();

        ESDStandardResponse esdReponse = createModuleService.createAtomicBlock("8601934885970354030", "atm1");



        RemoveModuleService moduleService = new RemoveModuleService();

        moduleService.removeAtomicBlock("8601934885970354030", esdReponse.getId());

    }

}

While I am running the client I am getting an exception as below:

Exception in thread "main" io.grpc.StatusRuntimeException: UNIMPLEMENTED: Method grpc.blocks.operations.ModuleContentServices/createAtomicBlock is unimplemented

    at io.grpc.stub.ClientCalls.toStatusRuntimeException(ClientCalls.java:233)

    at io.grpc.stub.ClientCalls.getUnchecked(ClientCalls.java:214)

    at io.grpc.stub.ClientCalls.blockingUnaryCall(ClientCalls.java:139)

In the above server class, if I am commenting the line theServiceList.add(new RemoveModuleContentService()); then the CreateModuleContentService service is working fine, also without commenting all the services of RemoveModuleContentService class are working as expected, which means the problem is with the first service when another gets added.

Can someone please suggest how can I add two services to Server Builder.

A particular gRPC service can only be implemented once per server. Since the name of the gRPC service in the error message is ModuleContentServices, I'm assuming CreateModuleContentService and RemoveModuleContentService both extend ModuleContentServicesImplBase.

When you add the same service multiple times, the last one wins. The way the generated code works, every method of a service is registered even if you don't implement that particular method. Every service method defaults to a handler that simply returns "UNIMPLEMENTED: Method X is unimplemented". createAtomicBlock isn't implemented in RemoveModuleContentService, so it returns that error.

If you interact with the ServerServiceDefinition returned by bindService(), you can mix-and-match methods a bit more, but this is a more advanced API and is intended more for frameworks to use because it can become verbose to compose every application service individually.