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// Copyright 2020 New Relic Corporation. All rights reserved.
// SPDX-License-Identifier: Apache-2.0
package main
import (
"context"
"fmt"
"log"
"os"
"time"
"github.com/micro/go-micro"
"github.com/newrelic/go-agent/v3/integrations/nrmicro"
proto "github.com/newrelic/go-agent/v3/integrations/nrmicro/example/proto"
newrelic "github.com/newrelic/go-agent/v3/newrelic"
)
func subEv(ctx context.Context, msg *proto.HelloRequest) error {
fmt.Println("Message received from", msg.GetName())
return nil
}
func publish(s micro.Service, app *newrelic.Application) {
c := s.Client()
for range time.NewTicker(time.Second).C {
txn := app.StartTransaction("publish")
msg := c.NewMessage("example.topic.pubsub", &proto.HelloRequest{Name: "Sally"})
ctx := newrelic.NewContext(context.Background(), txn)
fmt.Println("Sending message")
if err := c.Publish(ctx, msg); nil != err {
log.Fatal(err)
}
txn.End()
}
}
func main() {
app, err := newrelic.NewApplication(
newrelic.ConfigAppName("Micro Pub/Sub"),
newrelic.ConfigLicense(os.Getenv("NEW_RELIC_LICENSE_KEY")),
newrelic.ConfigDebugLogger(os.Stdout),
)
if nil != err {
panic(err)
}
err = app.WaitForConnection(10 * time.Second)
if nil != err {
panic(err)
}
defer app.Shutdown(10 * time.Second)
s := micro.NewService(
micro.Name("go.micro.srv.pubsub"),
// Add the New Relic wrapper to the client which will create
// MessageProducerSegments for each Publish call.
micro.WrapClient(nrmicro.ClientWrapper()),
// Add the New Relic wrapper to the subscriber which will start a new
// transaction for each Subscriber invocation.
micro.WrapSubscriber(nrmicro.SubscriberWrapper(app)),
)
s.Init()
go publish(s, app)
micro.RegisterSubscriber("example.topic.pubsub", s.Server(), subEv)
if err := s.Run(); err != nil {
log.Fatal(err)
}
}
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