/
rpc_interceptor.go
84 lines (72 loc) · 2.51 KB
/
rpc_interceptor.go
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/*
* Copyright (c) 2022, Alibaba Group;
* 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 trace
import (
"fmt"
"net/http"
"strings"
"github.com/gin-gonic/gin"
"github.com/opentracing/opentracing-go"
"github.com/petermattis/goid"
"github.com/alibaba/ioc-golang/aop"
)
type rpcInterceptor struct {
tracingGRIDMap map[int64]struct{}
}
func (r *rpcInterceptor) BeforeServerInvoke(c *gin.Context) error {
carrier := opentracing.HTTPHeadersCarrier(c.Request.Header)
clientContext, err := getGlobalTracer().getRawTracer().Extract(opentracing.HTTPHeaders, carrier)
if err == nil {
requestPath := c.Request.URL.Path
splitedPath := strings.Split(requestPath, "/")
if len(splitedPath) <= 2 {
return fmt.Errorf("invalid request path %s", requestPath)
}
method := splitedPath[len(splitedPath)-1]
traceByGrContext := newGoRoutineTracingContextWithClientSpan(method, clientContext)
getTraceInterceptorSingleton().TraceCurrentGR(traceByGrContext)
r.tracingGRIDMap[goid.Get()] = struct{}{}
}
return nil
}
func (r *rpcInterceptor) AfterServerInvoke(_ *gin.Context) error {
grID := goid.Get()
if _, ok := r.tracingGRIDMap[grID]; ok {
getTraceInterceptorSingleton().StopTraceCurrentGR()
delete(r.tracingGRIDMap, grID)
}
return nil
}
func (r *rpcInterceptor) BeforeClientInvoke(req *http.Request) error {
// inject tracing context if necessary
if currentSpan := getTraceInterceptorSingleton().GetCurrentSpan(); currentSpan != nil {
// current rpc invocation is in tracing link
carrier := opentracing.HTTPHeadersCarrier(req.Header)
_ = getGlobalTracer().getRawTracer().Inject(currentSpan.Context(), opentracing.HTTPHeaders, carrier)
}
return nil
}
func (r *rpcInterceptor) AfterClientInvoke(response *http.Response) error {
return nil
}
var rpcInterceptorSingleton aop.RPCInterceptor
func getTraceRPCInterceptorSingleton() aop.RPCInterceptor {
if rpcInterceptorSingleton == nil {
rpcInterceptorSingleton = &rpcInterceptor{
tracingGRIDMap: map[int64]struct{}{},
}
}
return rpcInterceptorSingleton
}