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// Copyright The OpenTelemetry Authors
// SPDX-License-Identifier: Apache-2.0
package main
import (
"context"
"log"
"os"
"time"
"go.opencensus.io/examples/exporter"
pb "go.opencensus.io/examples/grpc/proto"
"go.opencensus.io/plugin/ocgrpc"
"go.opencensus.io/trace"
"google.golang.org/grpc"
"google.golang.org/grpc/credentials/insecure"
)
const (
address = "localhost:50051"
defaultName = "world"
)
func main() {
log.Println("Configuring OpenCensus, and registering the Print exporter.")
trace.ApplyConfig(trace.Config{DefaultSampler: trace.AlwaysSample()})
trace.RegisterExporter(&exporter.PrintExporter{})
// Set up a connection to the server with the OpenCensus
// stats handler to enable tracing.
conn, err := grpc.NewClient(address, grpc.WithStatsHandler(&ocgrpc.ClientHandler{}), grpc.WithTransportCredentials(insecure.NewCredentials()))
if err != nil {
log.Fatalf("Cannot connect: %v", err)
}
defer conn.Close()
c := pb.NewGreeterClient(conn)
// Contact the server and print out its response.
name := defaultName
if len(os.Args) > 1 {
name = os.Args[1]
}
for {
r, err := c.SayHello(context.Background(), &pb.HelloRequest{Name: name})
if err != nil {
log.Printf("Could not greet: %v", err)
} else {
log.Printf("Greeting: %s", r.Message)
}
time.Sleep(2 * time.Second)
}
}
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