如何访问GRPC拦截消息请求？

Question

我想用户在服务器端进行多种方式为所有的人都具有相同的请求类型（StateRequest）相同的拦截器：

rpc apply (StateRequest) returns (StateResponse) {} 
rpc cancel (StateRequest) returns (StateResponse) {}
rpc remove (StateRequest) returns (StateResponse) {}
rpc development (StateRequest) returns (StateResponse) {}
rpc implement (StateRequest) returns (StateResponse) {}
rpc draft (StateRequest) returns (StateResponse) {}

拦截器：

public class ServerUserRoleAuthInterceptor implements ServerInterceptor {

    @Override
    public <ReqT, RespT> ServerCall.Listener<ReqT> interceptCall(
        ServerCall<ReqT, RespT> call,
        Metadata headers,
        ServerCallHandler<ReqT, RespT> next) {
        String callName = call.getMethodDescriptor().getFullMethodName();
        logger.info("Call: {}", callName);

        // TODO: validate request (`StateRequest` instance)

        return next.startCall(call, headers);
    }
}

我该怎么做？

Answer 1

你需要观察对onMessage(ReqT)的Listener回拨。

return new SimpleForwardingServerCallListener<ReqT>(next.startCall(call, headers)) {
  @Override 
  public void onMessage(ReqT request) {
    // TODO:validate request
    super.onMessage(request);
  }
};