mirror of
https://github.com/Luzifer/nginx-sso.git
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77 lines
2.1 KiB
Go
77 lines
2.1 KiB
Go
// Copyright 2018, OpenCensus Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package main
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import (
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"context"
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"log"
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"time"
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openzipkin "github.com/openzipkin/zipkin-go"
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"github.com/openzipkin/zipkin-go/reporter/http"
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"go.opencensus.io/exporter/zipkin"
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"go.opencensus.io/trace"
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)
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func main() {
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// The localEndpoint stores the name and address of the local service
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localEndpoint, err := openzipkin.NewEndpoint("example-server", "192.168.1.5:5454")
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if err != nil {
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log.Println(err)
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}
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// The Zipkin reporter takes collected spans from the app and reports them to the backend
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// http://localhost:9411/api/v2/spans is the default for the Zipkin Span v2
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reporter := http.NewReporter("http://localhost:9411/api/v2/spans")
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defer reporter.Close()
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// The OpenCensus exporter wraps the Zipkin reporter
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exporter := zipkin.NewExporter(reporter, localEndpoint)
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trace.RegisterExporter(exporter)
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// For example purposes, sample every trace. In a production application, you should
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// configure this to a trace.ProbabilitySampler set at the desired
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// probability.
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trace.ApplyConfig(trace.Config{DefaultSampler: trace.AlwaysSample()})
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ctx := context.Background()
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foo(ctx)
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}
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func foo(ctx context.Context) {
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// Name the current span "/foo"
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ctx, span := trace.StartSpan(ctx, "/foo")
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defer span.End()
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// Foo calls bar and baz
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bar(ctx)
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baz(ctx)
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}
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func bar(ctx context.Context) {
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ctx, span := trace.StartSpan(ctx, "/bar")
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defer span.End()
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// Do bar
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time.Sleep(2 * time.Millisecond)
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}
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func baz(ctx context.Context) {
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ctx, span := trace.StartSpan(ctx, "/baz")
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defer span.End()
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// Do baz
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time.Sleep(4 * time.Millisecond)
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}
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