examples/android/binder/java/io/grpc/binder/cpp/exampleserver/native.cc

   1 // Copyright 2021 gRPC authors.
   2 //
   3 // Licensed under the Apache License, Version 2.0 (the "License");
   4 // you may not use this file except in compliance with the License.
   5 // You may obtain a copy of the License at
   6 //
   7 //     http://www.apache.org/licenses/LICENSE-2.0
   8 //
   9 // Unless required by applicable law or agreed to in writing, software
  10 // distributed under the License is distributed on an "AS IS" BASIS,
  11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  12 // See the License for the specific language governing permissions and
  13 // limitations under the License.
  14
  15 #include <android/binder_auto_utils.h>
  16 #include <android/binder_ibinder.h>
  17 #include <android/binder_ibinder_jni.h>
  18 #include <android/binder_interface_utils.h>
  19 #include <android/log.h>
  20 #include <jni.h>
  21
  22 #include "examples/protos/helloworld.grpc.pb.h"
  23 #include "examples/protos/helloworld.pb.h"
  24
  25 #include <grpcpp/grpcpp.h>
  26
  27 #include "src/core/ext/transport/binder/server/binder_server.h"
  28 #include "src/core/ext/transport/binder/server/binder_server_credentials.h"
  29
  30 namespace {
  31 class GreeterService : public helloworld::Greeter::Service {
  32  public:
  33   grpc::Status SayHello(grpc::ServerContext*,
  34                         const helloworld::HelloRequest* request,
  35                         helloworld::HelloReply* response) override {
  36     __android_log_print(ANDROID_LOG_INFO, "DemoServer", "Line number %d",
  37                         __LINE__);
  38     __android_log_print(ANDROID_LOG_INFO, "DemoServer", "Got hello request: %s",
  39                         request->name().c_str());
  40     response->set_message("Hi, " + request->name());
  41     return grpc::Status::OK;
  42   }
  43 };
  44
  45 }  // namespace
  46
  47 extern "C" JNIEXPORT void JNICALL
  48 Java_io_grpc_binder_cpp_exampleserver_ExportedEndpointService_init_1grpc_1server(
  49     JNIEnv* env, jobject /*this*/) {
  50   __android_log_print(ANDROID_LOG_INFO, "DemoServer", "Line number %d",
  51                       __LINE__);
  52   static std::unique_ptr<grpc::Server> server = nullptr;
  53
  54   if (server != nullptr) {
  55     // Already initiated
  56     return;
  57   }
  58
  59   static GreeterService service;
  60   grpc::ServerBuilder server_builder;
  61   server_builder.RegisterService(&service);
  62
  63   server_builder.AddListeningPort(
  64       "binder://example.service",
  65       grpc::experimental::BinderServerCredentials());
  66
  67   server = server_builder.BuildAndStart();
  68 }
  69
  70 extern "C" JNIEXPORT jobject JNICALL
  71 Java_io_grpc_binder_cpp_exampleserver_ExportedEndpointService_get_1endpoint_1binder(
  72     JNIEnv* env, jobject /*this*/) {
  73   __android_log_print(ANDROID_LOG_INFO, "DemoServer", "Line number %d",
  74                       __LINE__);
  75
  76   auto ai_binder = static_cast<AIBinder*>(
  77       grpc::experimental::binder::GetEndpointBinder("example.service"));
  78
  79   __android_log_print(ANDROID_LOG_INFO, "DemoServer", "ai_binder = %p",
  80                       ai_binder);
  81   return AIBinder_toJavaBinder(env, ai_binder);
  82 }