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mux.go
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mux.go
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// Copyright (c) 2019 The Jaeger Authors.
// Copyright (c) 2017 Uber Technologies, Inc.
//
// Licensed 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 tracing
import (
"net/http"
"github.com/opentracing-contrib/go-stdlib/nethttp"
"github.com/opentracing/opentracing-go"
)
// NewServeMux creates a new TracedServeMux.
func NewServeMux(tracer opentracing.Tracer) *TracedServeMux {
return &TracedServeMux{
mux: http.NewServeMux(),
tracer: tracer,
}
}
// TracedServeMux is a wrapper around http.ServeMux that instruments handlers for tracing.
type TracedServeMux struct {
mux *http.ServeMux
tracer opentracing.Tracer
}
// Handle implements http.ServeMux#Handle
func (tm *TracedServeMux) Handle(pattern string, handler http.Handler) {
middleware := nethttp.Middleware(
tm.tracer,
handler,
nethttp.OperationNameFunc(func(r *http.Request) string {
return "HTTP " + r.Method + " " + pattern
}))
tm.mux.Handle(pattern, middleware)
}
// ServeHTTP implements http.ServeMux#ServeHTTP
func (tm *TracedServeMux) ServeHTTP(w http.ResponseWriter, r *http.Request) {
tm.mux.ServeHTTP(w, r)
}