56 lines
1.8 KiB
Go
56 lines
1.8 KiB
Go
// Copyright 2018, 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 (
|
|
"context"
|
|
|
|
"go.opencensus.io/trace"
|
|
"google.golang.org/grpc/stats"
|
|
)
|
|
|
|
// ClientHandler implements a gRPC stats.Handler for recording OpenCensus stats and
|
|
// traces. Use with gRPC clients only.
|
|
type ClientHandler struct {
|
|
// StartOptions allows configuring the StartOptions used to create new spans.
|
|
//
|
|
// StartOptions.SpanKind will always be set to trace.SpanKindClient
|
|
// for spans started by this handler.
|
|
StartOptions trace.StartOptions
|
|
}
|
|
|
|
// HandleConn exists to satisfy gRPC stats.Handler.
|
|
func (c *ClientHandler) HandleConn(ctx context.Context, cs stats.ConnStats) {
|
|
// no-op
|
|
}
|
|
|
|
// TagConn exists to satisfy gRPC stats.Handler.
|
|
func (c *ClientHandler) TagConn(ctx context.Context, cti *stats.ConnTagInfo) context.Context {
|
|
// no-op
|
|
return ctx
|
|
}
|
|
|
|
// HandleRPC implements per-RPC tracing and stats instrumentation.
|
|
func (c *ClientHandler) HandleRPC(ctx context.Context, rs stats.RPCStats) {
|
|
traceHandleRPC(ctx, rs)
|
|
statsHandleRPC(ctx, rs)
|
|
}
|
|
|
|
// TagRPC implements per-RPC context management.
|
|
func (c *ClientHandler) TagRPC(ctx context.Context, rti *stats.RPCTagInfo) context.Context {
|
|
ctx = c.traceTagRPC(ctx, rti)
|
|
ctx = c.statsTagRPC(ctx, rti)
|
|
return ctx
|
|
}
|