зеркало из https://github.com/github/vitess-gh.git
139 строки
3.2 KiB
Go
139 строки
3.2 KiB
Go
/*
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Copyright 2019 The Vitess 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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http://www.apache.org/licenses/LICENSE-2.0
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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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*/
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package stats
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import (
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"strconv"
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"time"
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"vitess.io/vitess/go/sync2"
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)
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// CounterDuration exports a time.Duration as counter.
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type CounterDuration struct {
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i sync2.AtomicDuration
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help string
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}
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// NewCounterDuration returns a new CounterDuration.
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func NewCounterDuration(name, help string) *CounterDuration {
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cd := &CounterDuration{
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help: help,
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}
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publish(name, cd)
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return cd
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}
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// Help implements the Variable interface.
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func (cd CounterDuration) Help() string {
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return cd.help
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}
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// String is the implementation of expvar.var.
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func (cd CounterDuration) String() string {
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return strconv.FormatInt(int64(cd.i.Get()), 10)
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}
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// Add adds the provided value to the CounterDuration.
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func (cd *CounterDuration) Add(delta time.Duration) {
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cd.i.Add(delta)
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}
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// Get returns the value.
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func (cd *CounterDuration) Get() time.Duration {
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return cd.i.Get()
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}
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// GaugeDuration exports a time.Duration as gauge.
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// In addition to CounterDuration, it also has Set() which allows overriding
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// the current value.
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type GaugeDuration struct {
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CounterDuration
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}
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// NewGaugeDuration returns a new GaugeDuration.
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func NewGaugeDuration(name, help string) *GaugeDuration {
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gd := &GaugeDuration{
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CounterDuration: CounterDuration{
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help: help,
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},
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}
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publish(name, gd)
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return gd
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}
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// Set sets the value.
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func (gd *GaugeDuration) Set(value time.Duration) {
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gd.i.Set(value)
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}
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// CounterDurationFunc allows to provide the value via a custom function.
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type CounterDurationFunc struct {
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F func() time.Duration
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help string
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}
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// NewCounterDurationFunc creates a new CounterDurationFunc instance and
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// publishes it if name is set.
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func NewCounterDurationFunc(name string, help string, f func() time.Duration) *CounterDurationFunc {
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cf := &CounterDurationFunc{
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F: f,
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help: help,
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}
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if name != "" {
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publish(name, cf)
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}
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return cf
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}
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// Help implements the Variable interface.
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func (cf CounterDurationFunc) Help() string {
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return cf.help
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}
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// Get returns the value.
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func (cf CounterDurationFunc) Get() int64 {
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return int64(cf.F())
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}
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// String is the implementation of expvar.var.
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func (cf CounterDurationFunc) String() string {
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return strconv.FormatInt(int64(cf.F()), 10)
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}
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// GaugeDurationFunc allows to provide the value via a custom function.
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type GaugeDurationFunc struct {
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CounterDurationFunc
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}
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// NewGaugeDurationFunc creates a new GaugeDurationFunc instance and
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// publishes it if name is set.
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func NewGaugeDurationFunc(name string, help string, f func() time.Duration) *GaugeDurationFunc {
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gf := &GaugeDurationFunc{
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CounterDurationFunc: CounterDurationFunc{
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F: f,
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help: help,
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},
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}
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if name != "" {
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publish(name, gf)
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}
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return gf
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}
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