public interface RpcChannel
Abstract interface for an RPC channel. An
RpcChannel represents a
communication line to a
Service which can be used to call that
Service's methods. The
Service may be running on another
machine. Normally, you should not call an
RpcChannel directly, but
instead construct a stub
Service wrapping it. Example:
RpcChannel channel = rpcImpl.newChannel("remotehost.example.com:1234"); RpcController controller = rpcImpl.newController(); MyService service = MyService.newStub(channel); service.myMethod(controller, request, callback);
Starting with version 2.3.0, RPC implementations should not try to build on this, but should instead provide code generator plugins which generate code specific to the particular RPC implementation. This way the generated code can be more appropriate for the implementation in use and can avoid unnecessary layers of indirection.
void callMethod(Descriptors.MethodDescriptor method, RpcController controller, Message request, Message responsePrototype, RpcCallback<Message> done)
Service.callMethod()with one important difference: the caller decides the types of the
Messageobjects, not the callee. The request may be of any type as long as
request.getDescriptor() == method.getInputType(). The response passed to the callback will be of the same type as
responsePrototype(which must have
getDescriptor() == method.getOutputType()).
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