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- /*
- Copyright 2019 The Vitess 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 stats
- import (
- "strconv"
- "time"
- "git.nspix.com/golang/micro/sync"
- )
- // CounterDuration exports a time.Duration as counter.
- type CounterDuration struct {
- i sync.AtomicDuration
- help string
- }
- // NewCounterDuration returns a new CounterDuration.
- func NewCounterDuration(name, help string) *CounterDuration {
- cd := &CounterDuration{
- help: help,
- }
- publish(name, cd)
- return cd
- }
- // Help implements the Variable interface.
- func (cd CounterDuration) Help() string {
- return cd.help
- }
- // String is the implementation of expvar.var.
- func (cd CounterDuration) String() string {
- return strconv.FormatInt(int64(cd.i.Get()), 10)
- }
- // Add adds the provided value to the CounterDuration.
- func (cd *CounterDuration) Add(delta time.Duration) {
- cd.i.Add(delta)
- }
- // Get returns the value.
- func (cd *CounterDuration) Get() time.Duration {
- return cd.i.Get()
- }
- // GaugeDuration exports a time.Duration as gauge.
- // In addition to CounterDuration, it also has Set() which allows overriding
- // the current value.
- type GaugeDuration struct {
- CounterDuration
- }
- // NewGaugeDuration returns a new GaugeDuration.
- func NewGaugeDuration(name, help string) *GaugeDuration {
- gd := &GaugeDuration{
- CounterDuration: CounterDuration{
- help: help,
- },
- }
- publish(name, gd)
- return gd
- }
- // Set sets the value.
- func (gd *GaugeDuration) Set(value time.Duration) {
- gd.i.Set(value)
- }
- // CounterDurationFunc allows to provide the value via a custom function.
- type CounterDurationFunc struct {
- F func() time.Duration
- help string
- }
- // NewCounterDurationFunc creates a new CounterDurationFunc instance and
- // publishes it if name is set.
- func NewCounterDurationFunc(name string, help string, f func() time.Duration) *CounterDurationFunc {
- cf := &CounterDurationFunc{
- F: f,
- help: help,
- }
- if name != "" {
- publish(name, cf)
- }
- return cf
- }
- // Help implements the Variable interface.
- func (cf CounterDurationFunc) Help() string {
- return cf.help
- }
- // Get returns the value.
- func (cf CounterDurationFunc) Get() int64 {
- return int64(cf.F())
- }
- // String is the implementation of expvar.var.
- func (cf CounterDurationFunc) String() string {
- return strconv.FormatInt(int64(cf.F()), 10)
- }
- // GaugeDurationFunc allows to provide the value via a custom function.
- type GaugeDurationFunc struct {
- CounterDurationFunc
- }
- // NewGaugeDurationFunc creates a new GaugeDurationFunc instance and
- // publishes it if name is set.
- func NewGaugeDurationFunc(name string, help string, f func() time.Duration) *GaugeDurationFunc {
- gf := &GaugeDurationFunc{
- CounterDurationFunc: CounterDurationFunc{
- F: f,
- help: help,
- },
- }
- if name != "" {
- publish(name, gf)
- }
- return gf
- }
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