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stats.go
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stats.go
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// mgo - MongoDB driver for Go
//
// Copyright (c) 2010-2012 - Gustavo Niemeyer <[email protected]>
//
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice, this
// list of conditions and the following disclaimer.
// 2. Redistributions in binary form must reproduce the above copyright notice,
// this list of conditions and the following disclaimer in the documentation
// and/or other materials provided with the distribution.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
// ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
// ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
package mgo
import (
"sync"
"time"
)
var stats *Stats
var statsMutex sync.Mutex
// SetStats enable database state monitoring
func SetStats(enabled bool) {
statsMutex.Lock()
if enabled {
if stats == nil {
stats = &Stats{}
}
} else {
stats = nil
}
statsMutex.Unlock()
}
// GetStats return the current database state
func GetStats() (snapshot Stats) {
statsMutex.Lock()
snapshot = *stats
statsMutex.Unlock()
return
}
// ResetStats reset Stats to the previous database state
func ResetStats() {
statsMutex.Lock()
debug("Resetting stats")
old := stats
stats = &Stats{}
// These are absolute values:
stats.Clusters = old.Clusters
stats.SocketsInUse = old.SocketsInUse
stats.SocketsAlive = old.SocketsAlive
stats.SocketRefs = old.SocketRefs
statsMutex.Unlock()
return
}
// Stats holds info on the database state
//
// Relevant documentation:
//
// https://docs.mongodb.com/manual/reference/command/serverStatus/
//
// TODO outdated fields ?
type Stats struct {
Clusters int
MasterConns int
SlaveConns int
SentOps int
ReceivedOps int
ReceivedDocs int
SocketsAlive int
SocketsInUse int
SocketRefs int
TimesSocketAcquired int
TimesWaitedForPool int
TotalPoolWaitTime time.Duration
PoolTimeouts int
}
func (stats *Stats) cluster(delta int) {
if stats != nil {
statsMutex.Lock()
stats.Clusters += delta
statsMutex.Unlock()
}
}
func (stats *Stats) conn(delta int, master bool) {
if stats != nil {
statsMutex.Lock()
if master {
stats.MasterConns += delta
} else {
stats.SlaveConns += delta
}
statsMutex.Unlock()
}
}
func (stats *Stats) sentOps(delta int) {
if stats != nil {
statsMutex.Lock()
stats.SentOps += delta
statsMutex.Unlock()
}
}
func (stats *Stats) receivedOps(delta int) {
if stats != nil {
statsMutex.Lock()
stats.ReceivedOps += delta
statsMutex.Unlock()
}
}
func (stats *Stats) receivedDocs(delta int) {
if stats != nil {
statsMutex.Lock()
stats.ReceivedDocs += delta
statsMutex.Unlock()
}
}
func (stats *Stats) socketsInUse(delta int) {
if stats != nil {
statsMutex.Lock()
stats.SocketsInUse += delta
statsMutex.Unlock()
}
}
func (stats *Stats) socketsAlive(delta int) {
if stats != nil {
statsMutex.Lock()
stats.SocketsAlive += delta
statsMutex.Unlock()
}
}
func (stats *Stats) socketRefs(delta int) {
if stats != nil {
statsMutex.Lock()
stats.SocketRefs += delta
statsMutex.Unlock()
}
}
func (stats *Stats) noticeSocketAcquisition(waitTime time.Duration) {
if stats != nil {
statsMutex.Lock()
stats.TimesSocketAcquired++
stats.TotalPoolWaitTime += waitTime
if waitTime > 0 {
stats.TimesWaitedForPool++
}
statsMutex.Unlock()
}
}
func (stats *Stats) noticePoolTimeout(waitTime time.Duration) {
if stats != nil {
statsMutex.Lock()
stats.TimesWaitedForPool++
stats.PoolTimeouts++
stats.TotalPoolWaitTime += waitTime
statsMutex.Unlock()
}
}