/
main.go
106 lines (87 loc) · 2.11 KB
/
main.go
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package main
import (
"context"
"log"
"net"
"time"
"github.com/opentracing/opentracing-go"
"github.com/openzipkin/zipkin-go"
"google.golang.org/grpc"
pb "github.com/yeqown/tracing-practice/api"
"github.com/yeqown/tracing-practice/examples/opentracing/x"
)
var (
addr = "127.0.0.1:8081"
serverBAddr = "127.0.0.1:8082"
serverCAddr = "127.0.0.1:8083"
zipkinTracer *zipkin.Tracer
)
func bootstrap() {
err := x.BootTracerWrapper("service-a", addr)
if err != nil {
log.Fatalf("did not boot tracer: %v", err)
}
}
func main() {
bootstrap()
lis, err := net.Listen("tcp", addr)
if err != nil {
log.Fatalf("failed to listen: %v", err)
}
s := grpc.NewServer(
grpc.UnaryInterceptor(x.OpenTracingServerInterceptor(
opentracing.GlobalTracer(), x.LogPayloads())),
)
pb.RegisterPingAServer(s, newPingA())
log.Println("running on: ", addr)
if err := s.Serve(lis); err != nil {
log.Fatalf("failed to serve: %v", err)
}
}
type pingA struct {
pb.UnimplementedPingAServer
serverBConn pb.PingBClient
serverCConn pb.PingCClient
}
func newPingA() *pingA {
// Set up a connection to the server.
bConn, err := grpc.Dial(serverBAddr,
grpc.WithInsecure(),
grpc.WithUnaryInterceptor(x.OpenTracingClientInterceptor(opentracing.GlobalTracer(), x.LogPayloads())),
)
if err != nil {
log.Fatalf("did not connect: %v", err)
}
cConn, err := grpc.Dial(serverCAddr,
grpc.WithInsecure(),
grpc.WithUnaryInterceptor(x.OpenTracingClientInterceptor(opentracing.GlobalTracer(), x.LogPayloads())),
)
if err != nil {
log.Fatalf("did not connect: %v", err)
}
return &pingA{
serverBConn: pb.NewPingBClient(bConn),
serverCConn: pb.NewPingCClient(cConn),
}
}
func (p pingA) PingA(ctx context.Context, req *pb.PingAReq) (*pb.PingAResponse, error) {
x.LogWithContext(ctx, "PingA calling")
// call server-B and server-C
_, err := p.serverBConn.PingB(ctx, &pb.PingBReq{
Now: req.Now,
From: "a",
})
if err != nil {
return nil, err
}
_, err = p.serverCConn.PingC(ctx, &pb.PingCReq{
Now: req.Now,
From: "a",
})
if err != nil {
return nil, err
}
return &pb.PingAResponse{
Now: time.Now().Unix(),
}, nil
}