feat: add grpc stream sample

general/grpc/stream/go-client/app/client.go

@@ -0,0 +1,144 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package main
+
+import (
+	"context"
+	"fmt"
+	"os"
+	"os/signal"
+	"syscall"
+	"time"
+)
+
+import (
+	gxlog "github.com/dubbogo/gost/log"
+)
+
+import (
+	_ "github.com/apache/dubbo-go/cluster/cluster_impl"
+	_ "github.com/apache/dubbo-go/cluster/loadbalance"
+	"github.com/apache/dubbo-go/common/logger"
+	_ "github.com/apache/dubbo-go/common/proxy/proxy_factory"
+	"github.com/apache/dubbo-go/config"
+	_ "github.com/apache/dubbo-go/filter/filter_impl"
+	_ "github.com/apache/dubbo-go/protocol/dubbo"
+	_ "github.com/apache/dubbo-go/protocol/grpc"
+	_ "github.com/apache/dubbo-go/registry/protocol"
+	_ "github.com/apache/dubbo-go/registry/zookeeper"
+)
+
+var (
+	survivalTimeout int = 10e9
+)
+
+// they are necessary:
+// 		export CONF_CONSUMER_FILE_PATH="xxx"
+// 		export APP_LOG_CONF_FILE="xxx"
+func main() {
+	config.Load()
+	time.Sleep(time.Second)
+
+	gxlog.CInfo("\n\n\n===== start to test SayHelloTwoSidesStream ======")
+	reply := &HelloReply{}
+	stream, err := grpcGreeterImpl.SayHelloTwoSidesStream(context.TODO())
+	if err != nil {
+		logger.Errorf("stream get err = %s", err.Error())
+		return
+	}
+
+	if err := stream.Send(&HelloRequest{Name: "request 1"}); err != nil {
+		logger.Errorf("send stream req err = %s", err.Error())
+	}
+	if err := stream.Send(&HelloRequest{Name: "request 2"}); err != nil {
+		logger.Errorf("send stream req err = %s", err.Error())
+	}
+	reply, err = stream.Recv()
+	if err != nil {
+		panic(err)
+	}
+	gxlog.CInfo("client response result: %v\n", reply)
+	reply, err = stream.Recv()
+	if err != nil {
+		panic(err)
+	}
+	gxlog.CInfo("client response result: %v\n", reply)
+
+	gxlog.CInfo("\n\n\n===== start to test SayHelloClientStream =====")
+	clientStream, err := grpcGreeterImpl.SayHelloClientStream(context.TODO())
+	if err != nil {
+		logger.Errorf("stream get err = %s", err.Error())
+		return
+	}
+
+	if err := clientStream.Send(&HelloRequest{Name: "request 1"}); err != nil {
+		logger.Errorf("send stream req err = %s", err.Error())
+	}
+	if err := clientStream.Send(&HelloRequest{Name: "request 2"}); err != nil {
+		logger.Errorf("send stream req err = %s", err.Error())
+	}
+	err = clientStream.RecvMsg(reply)
+	if err != nil {
+		panic(err)
+	}
+	gxlog.CInfo("client response result: %v\n", reply)
+
+	gxlog.CInfo("\n\n\n===== start to test SayHelloServerStream =====")
+	req := &HelloRequest{}
+	serverStream, err := grpcGreeterImpl.SayHelloServerStream(context.TODO(), req)
+	if err != nil {
+		logger.Errorf("stream get err = %s", err.Error())
+		return
+	}
+	reply, err = serverStream.Recv()
+	if err != nil {
+		panic(err)
+	}
+	gxlog.CInfo("client response result: %v\n", reply)
+	reply, err = serverStream.Recv()
+	if err != nil {
+		panic(err)
+	}
+	gxlog.CInfo("client response result: %v\n", reply)
+
+	initSignal()
+}
+
+func initSignal() {
+	signals := make(chan os.Signal, 1)
+	// It is not possible to block SIGKILL or syscall.SIGSTOP
+	signal.Notify(signals, os.Interrupt, os.Kill, syscall.SIGHUP,
+		syscall.SIGQUIT, syscall.SIGTERM, syscall.SIGINT)
+	for {
+		sig := <-signals
+		logger.Infof("get signal %s", sig.String())
+		switch sig {
+		case syscall.SIGHUP:
+			// reload()
+		default:
+			time.AfterFunc(time.Duration(survivalTimeout), func() {
+				logger.Warnf("app exit now by force...")
+				os.Exit(1)
+			})
+
+			// The program exits normally or timeout forcibly exits.
+			fmt.Println("app exit now...")
+			return
+		}
+	}
+}

general/grpc/stream/go-client/app/hello.go

@@ -0,0 +1,50 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package main
+
+import (
+	"context"
+)
+
+import (
+	"google.golang.org/grpc"
+)
+
+import (
+	"github.com/apache/dubbo-go/config"
+)
+
+var grpcGreeterImpl = new(GrpcGreeterImpl)
+
+func init() {
+	config.SetConsumerService(grpcGreeterImpl)
+}
+
+type GrpcGreeterImpl struct {
+	SayHelloTwoSidesStream func(ctx context.Context) (Greeter_SayHelloTwoSidesStreamClient, error)
+	SayHelloClientStream   func(ctx context.Context) (Greeter_SayHelloClientStreamClient, error)
+	SayHelloServerStream   func(ctx context.Context, request *HelloRequest) (Greeter_SayHelloServerStreamClient, error)
+}
+
+func (u *GrpcGreeterImpl) Reference() string {
+	return "GrpcGreeterImpl"
+}
+
+func (u *GrpcGreeterImpl) GetDubboStub(cc *grpc.ClientConn) GreeterClient {
+	return NewGreeterClient(cc)
+}