| /* |
| * 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" |
| "math/rand" |
| "os" |
| "time" |
| ) |
| |
| import ( |
| "contrib.go.opencensus.io/exporter/prometheus" |
| |
| hessian "github.com/apache/dubbo-go-hessian2" |
| _ "github.com/apache/dubbo-go/cluster/cluster_impl" |
| _ "github.com/apache/dubbo-go/cluster/loadbalance" |
| _ "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/registry/protocol" |
| _ "github.com/apache/dubbo-go/registry/zookeeper" |
| |
| "github.com/dubbogo/gost/log" |
| |
| "github.com/opentracing/opentracing-go" |
| |
| zipkinot "github.com/openzipkin-contrib/zipkin-go-opentracing" |
| |
| "github.com/openzipkin/zipkin-go" |
| zipkinhttp "github.com/openzipkin/zipkin-go/reporter/http" |
| |
| "go.opencensus.io/stats/view" |
| ) |
| |
| import ( |
| "github.com/apache/dubbo-go-samples/openzipkin/go-client/pkg" |
| ) |
| |
| var userProviderA = new(pkg.UserProviderA) |
| var userProviderB = new(pkg.UserProviderB) |
| |
| func init() { |
| config.SetConsumerService(userProviderA) |
| config.SetConsumerService(userProviderB) |
| hessian.RegisterPOJO(&pkg.User{}) |
| } |
| |
| // need to setup environment variable "CONF_CONSUMER_FILE_PATH" to "conf/client.yml" before run |
| func main() { |
| |
| config.Load() |
| |
| // register zipkin & prometheus exporter |
| registerZipkin() |
| registerPrometheus() |
| |
| time.Sleep(3 * time.Second) |
| |
| gxlog.CInfo("\n\n\nstart to test dubbo") |
| |
| getUserAll(context.Background()) |
| } |
| |
| func getUserAll(ctx context.Context) { |
| span, ctx := opentracing.StartSpanFromContext(ctx, "getUserAll") |
| |
| getUserA(ctx) |
| span.Finish() |
| |
| getUserB(ctx) |
| span.Finish() |
| |
| getUserA(ctx) |
| span.Finish() |
| |
| getUserB(ctx) |
| span.Finish() |
| } |
| |
| func getUserA(ctx context.Context) { |
| |
| time.Sleep(time.Duration(rand.Intn(977)+300) * time.Millisecond) |
| user := &pkg.User{} |
| err := userProviderA.GetUser(ctx, []interface{}{"A001"}, user) |
| if err != nil { |
| gxlog.CError("error: %v\n", err) |
| os.Exit(1) |
| return |
| } |
| gxlog.CInfo("response result: %v\n", user) |
| |
| } |
| func getUserB(ctx context.Context) { |
| |
| time.Sleep(time.Duration(rand.Intn(977)+300) * time.Millisecond) |
| user := &pkg.User{} |
| err := userProviderB.GetUser(ctx, []interface{}{"A001"}, user) |
| if err != nil { |
| gxlog.CError("error: %v\n", err) |
| os.Exit(1) |
| return |
| } |
| gxlog.CInfo("response result: %v\n", user) |
| } |
| |
| // zipkin / opentracing specific stuff |
| func registerZipkin() { |
| // set up a span reporter |
| reporter := zipkinhttp.NewReporter("http://localhost:9411/api/v2/spans") |
| |
| // create our local service endpoint |
| endpoint, err := zipkin.NewEndpoint("go-client", "localhost:80") |
| if err != nil { |
| gxlog.CError("unable to create local endpoint: %+v\n", err) |
| } |
| |
| // set sampler , default AlwaysSample |
| //sampler := zipkin.NewModuloSampler(1) |
| |
| // initialize our tracer |
| //nativeTracer, err := zipkin.NewTracer(reporter, zipkin.WithLocalEndpoint(endpoint), zipkin.WithSampler(sampler)) |
| nativeTracer, err := zipkin.NewTracer(reporter, zipkin.WithLocalEndpoint(endpoint)) |
| |
| if err != nil { |
| gxlog.CError("unable to create tracer: %+v\n", err) |
| } |
| |
| // use zipkin-go-opentracing to wrap our tracer |
| tracer := zipkinot.Wrap(nativeTracer) |
| |
| // optionally set as Global OpenTracing tracer instance |
| opentracing.SetGlobalTracer(tracer) |
| } |
| |
| // register prometheus exporter for zipkin |
| func registerPrometheus() *prometheus.Exporter { |
| pe, err := prometheus.NewExporter(prometheus.Options{Namespace: "go-client"}) |
| if err != nil { |
| gxlog.CError("Failed to create Prometheus exporter: %v", err) |
| } |
| view.RegisterExporter(pe) |
| return pe |
| } |