mirror of
https://github.com/superseriousbusiness/gotosocial.git
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1ba3e14b36
* feat: Initial OTEL metrics * docs: add metrics documentation * fix: metrics endpoint conditional check * feat: metrics endpoint basic auth * fix: make metrics-auth-enabled default false * fix: go fmt helpers.gen.go * fix: add metric-related env vars to envparsing.sh * fix: metrics docs * fix: metrics related stuff in envparsing.sh * fix: metrics docs * chore: metrics docs wording * fix: metrics stuff in envparsing? * bump otel versions --------- Co-authored-by: Tsuribori <user@acertaindebian> Co-authored-by: Tsuribori <none@example.org> Co-authored-by: tsmethurst <tobi.smethurst@protonmail.com>
82 lines
2.5 KiB
Go
82 lines
2.5 KiB
Go
// Copyright 2016 The Prometheus Authors
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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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package prometheus
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import "time"
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// Timer is a helper type to time functions. Use NewTimer to create new
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// instances.
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type Timer struct {
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begin time.Time
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observer Observer
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}
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// NewTimer creates a new Timer. The provided Observer is used to observe a
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// duration in seconds. If the Observer implements ExemplarObserver, passing exemplar
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// later on will be also supported.
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// Timer is usually used to time a function call in the
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// following way:
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//
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// func TimeMe() {
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// timer := NewTimer(myHistogram)
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// defer timer.ObserveDuration()
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// // Do actual work.
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// }
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//
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// or
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//
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// func TimeMeWithExemplar() {
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// timer := NewTimer(myHistogram)
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// defer timer.ObserveDurationWithExemplar(exemplar)
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// // Do actual work.
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// }
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func NewTimer(o Observer) *Timer {
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return &Timer{
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begin: time.Now(),
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observer: o,
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}
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}
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// ObserveDuration records the duration passed since the Timer was created with
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// NewTimer. It calls the Observe method of the Observer provided during
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// construction with the duration in seconds as an argument. The observed
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// duration is also returned. ObserveDuration is usually called with a defer
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// statement.
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//
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// Note that this method is only guaranteed to never observe negative durations
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// if used with Go1.9+.
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func (t *Timer) ObserveDuration() time.Duration {
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d := time.Since(t.begin)
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if t.observer != nil {
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t.observer.Observe(d.Seconds())
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}
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return d
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}
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// ObserveDurationWithExemplar is like ObserveDuration, but it will also
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// observe exemplar with the duration unless exemplar is nil or provided Observer can't
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// be casted to ExemplarObserver.
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func (t *Timer) ObserveDurationWithExemplar(exemplar Labels) time.Duration {
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d := time.Since(t.begin)
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eo, ok := t.observer.(ExemplarObserver)
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if ok && exemplar != nil {
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eo.ObserveWithExemplar(d.Seconds(), exemplar)
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return d
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}
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if t.observer != nil {
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t.observer.Observe(d.Seconds())
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}
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return d
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}
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