mirror of
https://github.com/restic/restic.git
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169 lines
6.0 KiB
Go
169 lines
6.0 KiB
Go
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// Copyright 2018 Google Inc. All Rights Reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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// +build go1.8
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package pubsub
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import (
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"log"
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"sync"
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"go.opencensus.io/plugin/ocgrpc"
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"go.opencensus.io/stats"
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"go.opencensus.io/stats/view"
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"go.opencensus.io/tag"
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"golang.org/x/net/context"
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"google.golang.org/api/option"
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"google.golang.org/grpc"
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)
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func openCensusOptions() []option.ClientOption {
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return []option.ClientOption{
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option.WithGRPCDialOption(grpc.WithStatsHandler(&ocgrpc.ClientHandler{})),
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}
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}
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var subscriptionKey tag.Key
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func init() {
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var err error
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if subscriptionKey, err = tag.NewKey("subscription"); err != nil {
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log.Fatal("cannot create 'subscription' key")
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}
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}
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var (
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// PullCount is a measure of the number of messages pulled.
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// It is EXPERIMENTAL and subject to change or removal without notice.
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PullCount *stats.Int64Measure
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// AckCount is a measure of the number of messages acked.
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// It is EXPERIMENTAL and subject to change or removal without notice.
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AckCount *stats.Int64Measure
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// NackCount is a measure of the number of messages nacked.
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// It is EXPERIMENTAL and subject to change or removal without notice.
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NackCount *stats.Int64Measure
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// ModAckCount is a measure of the number of messages whose ack-deadline was modified.
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// It is EXPERIMENTAL and subject to change or removal without notice.
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ModAckCount *stats.Int64Measure
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// StreamOpenCount is a measure of the number of times a streaming-pull stream was opened.
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// It is EXPERIMENTAL and subject to change or removal without notice.
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StreamOpenCount *stats.Int64Measure
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// StreamRetryCount is a measure of the number of times a streaming-pull operation was retried.
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// It is EXPERIMENTAL and subject to change or removal without notice.
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StreamRetryCount *stats.Int64Measure
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// StreamRequestCount is a measure of the number of requests sent on a streaming-pull stream.
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// It is EXPERIMENTAL and subject to change or removal without notice.
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StreamRequestCount *stats.Int64Measure
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// StreamRequestCount is a measure of the number of responses received on a streaming-pull stream.
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// It is EXPERIMENTAL and subject to change or removal without notice.
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StreamResponseCount *stats.Int64Measure
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// PullCountView is a cumulative sum of PullCount.
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// It is EXPERIMENTAL and subject to change or removal without notice.
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PullCountView *view.View
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// AckCountView is a cumulative sum of AckCount.
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// It is EXPERIMENTAL and subject to change or removal without notice.
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AckCountView *view.View
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// NackCountView is a cumulative sum of NackCount.
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// It is EXPERIMENTAL and subject to change or removal without notice.
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NackCountView *view.View
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// ModAckCountView is a cumulative sum of ModAckCount.
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// It is EXPERIMENTAL and subject to change or removal without notice.
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ModAckCountView *view.View
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// StreamOpenCountView is a cumulative sum of StreamOpenCount.
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// It is EXPERIMENTAL and subject to change or removal without notice.
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StreamOpenCountView *view.View
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// StreamRetryCountView is a cumulative sum of StreamRetryCount.
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// It is EXPERIMENTAL and subject to change or removal without notice.
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StreamRetryCountView *view.View
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// StreamRequestCountView is a cumulative sum of StreamRequestCount.
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// It is EXPERIMENTAL and subject to change or removal without notice.
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StreamRequestCountView *view.View
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// StreamResponseCountView is a cumulative sum of StreamResponseCount.
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// It is EXPERIMENTAL and subject to change or removal without notice.
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StreamResponseCountView *view.View
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)
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const statsPrefix = "cloud.google.com/go/pubsub/"
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func init() {
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PullCount = mustNewMeasure("pull_count", "Number of PubSub messages pulled")
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AckCount = mustNewMeasure("ack_count", "Number of PubSub messages acked")
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NackCount = mustNewMeasure("nack_count", "Number of PubSub messages nacked")
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ModAckCount = mustNewMeasure("mod_ack_count", "Number of ack-deadlines modified")
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StreamOpenCount = mustNewMeasure("stream_open_count", "Number of calls opening a new streaming pull")
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StreamRetryCount = mustNewMeasure("stream_retry_count", "Number of retries of a stream send or receive")
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StreamRequestCount = mustNewMeasure("stream_request_count", "Number gRPC StreamingPull request messages sent")
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StreamResponseCount = mustNewMeasure("stream_response_count", "Number of gRPC StreamingPull response messages received")
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PullCountView = mustNewView(PullCount)
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AckCountView = mustNewView(AckCount)
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NackCountView = mustNewView(NackCount)
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ModAckCountView = mustNewView(ModAckCount)
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StreamOpenCountView = mustNewView(StreamOpenCount)
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StreamRetryCountView = mustNewView(StreamRetryCount)
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StreamRequestCountView = mustNewView(StreamRequestCount)
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StreamResponseCountView = mustNewView(StreamResponseCount)
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}
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func mustNewMeasure(name, desc string) *stats.Int64Measure {
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const unitCount = "1"
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name = statsPrefix + name
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m, err := stats.Int64(name, desc, unitCount)
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if err != nil {
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log.Fatalf("creating %q: %v", name, err)
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}
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return m
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}
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func mustNewView(m *stats.Int64Measure) *view.View {
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v, err := view.New(m.Name(), "cumulative "+m.Description(),
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[]tag.Key{subscriptionKey}, m, view.Sum())
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if err != nil {
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log.Fatalf("creating view for %q: %v", m.Name(), err)
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}
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return v
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}
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var logOnce sync.Once
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func withSubscriptionKey(ctx context.Context, subName string) context.Context {
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ctx, err := tag.New(ctx, tag.Upsert(subscriptionKey, subName))
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if err != nil {
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logOnce.Do(func() {
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log.Printf("pubsub: error creating tag map: %v", err)
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})
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}
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return ctx
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}
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func recordStat(ctx context.Context, m *stats.Int64Measure, n int64) {
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stats.Record(ctx, m.M(n))
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}
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