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// Copyright 2018 Google Inc. All Rights Reserved.
//
// 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.
// +build go1.8
package pubsub
import (
"log"
"sync"
"go.opencensus.io/plugin/ocgrpc"
"go.opencensus.io/stats"
"go.opencensus.io/stats/view"
"go.opencensus.io/tag"
"golang.org/x/net/context"
"google.golang.org/api/option"
"google.golang.org/grpc"
)
func openCensusOptions() []option.ClientOption {
return []option.ClientOption{
option.WithGRPCDialOption(grpc.WithStatsHandler(&ocgrpc.ClientHandler{})),
}
}
var subscriptionKey tag.Key
func init() {
var err error
if subscriptionKey, err = tag.NewKey("subscription"); err != nil {
log.Fatal("cannot create 'subscription' key")
}
}
const statsPrefix = "cloud.google.com/go/pubsub/"
var (
// PullCount is a measure of the number of messages pulled.
// It is EXPERIMENTAL and subject to change or removal without notice.
PullCount = stats.Int64(statsPrefix+"pull_count", "Number of PubSub messages pulled", stats.UnitNone)
// AckCount is a measure of the number of messages acked.
// It is EXPERIMENTAL and subject to change or removal without notice.
AckCount = stats.Int64(statsPrefix+"ack_count", "Number of PubSub messages acked", stats.UnitNone)
// NackCount is a measure of the number of messages nacked.
// It is EXPERIMENTAL and subject to change or removal without notice.
NackCount = stats.Int64(statsPrefix+"nack_count", "Number of PubSub messages nacked", stats.UnitNone)
// ModAckCount is a measure of the number of messages whose ack-deadline was modified.
// It is EXPERIMENTAL and subject to change or removal without notice.
ModAckCount = stats.Int64(statsPrefix+"mod_ack_count", "Number of ack-deadlines modified", stats.UnitNone)
// StreamOpenCount is a measure of the number of times a streaming-pull stream was opened.
// It is EXPERIMENTAL and subject to change or removal without notice.
StreamOpenCount = stats.Int64(statsPrefix+"stream_open_count", "Number of calls opening a new streaming pull", stats.UnitNone)
// StreamRetryCount is a measure of the number of times a streaming-pull operation was retried.
// It is EXPERIMENTAL and subject to change or removal without notice.
StreamRetryCount = stats.Int64(statsPrefix+"stream_retry_count", "Number of retries of a stream send or receive", stats.UnitNone)
// StreamRequestCount is a measure of the number of requests sent on a streaming-pull stream.
// It is EXPERIMENTAL and subject to change or removal without notice.
StreamRequestCount = stats.Int64(statsPrefix+"stream_request_count", "Number gRPC StreamingPull request messages sent", stats.UnitNone)
// StreamResponseCount is a measure of the number of responses received on a streaming-pull stream.
// It is EXPERIMENTAL and subject to change or removal without notice.
StreamResponseCount = stats.Int64(statsPrefix+"stream_response_count", "Number of gRPC StreamingPull response messages received", stats.UnitNone)
// PullCountView is a cumulative sum of PullCount.
// It is EXPERIMENTAL and subject to change or removal without notice.
PullCountView *view.View
// AckCountView is a cumulative sum of AckCount.
// It is EXPERIMENTAL and subject to change or removal without notice.
AckCountView *view.View
// NackCountView is a cumulative sum of NackCount.
// It is EXPERIMENTAL and subject to change or removal without notice.
NackCountView *view.View
// ModAckCountView is a cumulative sum of ModAckCount.
// It is EXPERIMENTAL and subject to change or removal without notice.
ModAckCountView *view.View
// StreamOpenCountView is a cumulative sum of StreamOpenCount.
// It is EXPERIMENTAL and subject to change or removal without notice.
StreamOpenCountView *view.View
// StreamRetryCountView is a cumulative sum of StreamRetryCount.
// It is EXPERIMENTAL and subject to change or removal without notice.
StreamRetryCountView *view.View
// StreamRequestCountView is a cumulative sum of StreamRequestCount.
// It is EXPERIMENTAL and subject to change or removal without notice.
StreamRequestCountView *view.View
// StreamResponseCountView is a cumulative sum of StreamResponseCount.
// It is EXPERIMENTAL and subject to change or removal without notice.
StreamResponseCountView *view.View
)
func init() {
PullCountView = countView(PullCount)
AckCountView = countView(AckCount)
NackCountView = countView(NackCount)
ModAckCountView = countView(ModAckCount)
StreamOpenCountView = countView(StreamOpenCount)
StreamRetryCountView = countView(StreamRetryCount)
StreamRequestCountView = countView(StreamRequestCount)
StreamResponseCountView = countView(StreamResponseCount)
}
func countView(m *stats.Int64Measure) *view.View {
return &view.View{
Name: m.Name(),
Description: m.Description(),
TagKeys: []tag.Key{subscriptionKey},
Measure: m,
Aggregation: view.Sum(),
}
}
var logOnce sync.Once
func withSubscriptionKey(ctx context.Context, subName string) context.Context {
ctx, err := tag.New(ctx, tag.Upsert(subscriptionKey, subName))
if err != nil {
logOnce.Do(func() {
log.Printf("pubsub: error creating tag map: %v", err)
})
}
return ctx
}
func recordStat(ctx context.Context, m *stats.Int64Measure, n int64) {
stats.Record(ctx, m.M(n))
}
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