example: deadline

examples/deadline/client/client.go

@@ -0,0 +1,55 @@
+/*
+ *
+ * Copyright 2018 gRPC authors.
+ *
+ * Licensed 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 client
+
+import (
+	"context"
+	"log"
+	"time"
+
+	"google.golang.org/grpc"
+	pb "google.golang.org/grpc/examples/helloworld/helloworld"
+)
+
+// ConnectAndRequest sets up a connection to the server,
+// makes a request and returns, if successful, the reply.
+func ConnectAndRequest(name string) (*pb.HelloReply, error) {
+	conn, err := grpc.Dial("localhost:50052", grpc.WithInsecure())
+	if err != nil {
+		log.Fatalf("did not connect: %v", err)
+	}
+	defer conn.Close()
+
+	c := pb.NewGreeterClient(conn)
+
+	ctx, cancel := context.WithTimeout(context.Background(), time.Second)
+	defer cancel()
+
+	req := &pb.HelloRequest{Name: name}
+
+	log.Println("# NEW REQUEST #")
+	log.Printf("Request: { %+v}", req)
+	rep, err := c.SayHello(ctx, req)
+	if err != nil {
+		log.Printf("No reply: %v", err)
+		return nil, err
+	}
+	log.Printf("Reply: { %+v}", rep)
+	return rep, nil
+}

examples/deadline/clientmain/main.go

@@ -0,0 +1,34 @@
+/*
+ *
+ * Copyright 2018 gRPC authors.
+ *
+ * Licensed 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 (
+	"google.golang.org/grpc/examples/deadline/client"
+)
+
+func main() {
+	// A successful request
+	client.ConnectAndRequest("world")
+	// Exceeds deadline
+	client.ConnectAndRequest("delay")
+	// A successful request with propagated deadline
+	client.ConnectAndRequest("[propagate me]world")
+	// Exceeds propagated deadline
+	client.ConnectAndRequest("[propagate me][propagate me]world")
+}

examples/deadline/servermain/server.go

@@ -0,0 +1,62 @@
+/*
+ *
+ * Copyright 2018 gRPC authors.
+ *
+ * Licensed 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"
+	"log"
+	"net"
+	"strings"
+	"time"
+
+	"google.golang.org/grpc/examples/deadline/client"
+
+	"google.golang.org/grpc"
+	pb "google.golang.org/grpc/examples/helloworld/helloworld"
+)
+
+type server struct{}
+
+// SayHello implements helloworld.GreeterServer
+func (s *server) SayHello(ctx context.Context, in *pb.HelloRequest) (*pb.HelloReply, error) {
+	name := in.Name
+	if strings.HasPrefix(name, "[propagate me]") {
+		time.Sleep(800 * time.Millisecond)
+		name = strings.TrimPrefix(name, "[propagate me]")
+		return client.ConnectAndRequest(name)
+	}
+
+	if name == "delay" {
+		time.Sleep(1500 * time.Millisecond)
+	}
+
+	return &pb.HelloReply{Message: "Hello " + name}, nil
+}
+
+func main() {
+	lis, err := net.Listen("tcp", ":50052")
+	if err != nil {
+		log.Fatalf("failed to listen: %v", err)
+	}
+	s := grpc.NewServer()
+	pb.RegisterGreeterServer(s, &server{})
+	if err := s.Serve(lis); err != nil {
+		log.Fatalf("failed to serve: %v", err)
+	}
+}