50 lines
1.4 KiB
Go
50 lines
1.4 KiB
Go
// Copyright 2017, OpenCensus Authors
|
|
//
|
|
// 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 ocgrpc
|
|
|
|
import (
|
|
"time"
|
|
|
|
"go.opencensus.io/tag"
|
|
"golang.org/x/net/context"
|
|
"google.golang.org/grpc/grpclog"
|
|
"google.golang.org/grpc/stats"
|
|
)
|
|
|
|
// statsTagRPC gets the tag.Map populated by the application code, serializes
|
|
// its tags into the GRPC metadata in order to be sent to the server.
|
|
func (h *ClientHandler) statsTagRPC(ctx context.Context, info *stats.RPCTagInfo) context.Context {
|
|
startTime := time.Now()
|
|
if info == nil {
|
|
if grpclog.V(2) {
|
|
grpclog.Infof("clientHandler.TagRPC called with nil info.", info.FullMethodName)
|
|
}
|
|
return ctx
|
|
}
|
|
|
|
d := &rpcData{
|
|
startTime: startTime,
|
|
method: info.FullMethodName,
|
|
}
|
|
ts := tag.FromContext(ctx)
|
|
if ts != nil {
|
|
encoded := tag.Encode(ts)
|
|
ctx = stats.SetTags(ctx, encoded)
|
|
}
|
|
|
|
return context.WithValue(ctx, rpcDataKey, d)
|
|
}
|