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simple_group.go
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/
simple_group.go
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// Copyright(C) 2021 github.com/fsgo All Rights Reserved.
// Author: fsgo
// Date: 2021/3/21
package fspool
import (
"context"
"fmt"
"io"
"sync"
"time"
)
// GroupNewElementFunc 给 Group 创建新的 pool
type GroupNewElementFunc func(key any) NewElementFunc
// NewSimplePoolGroup 创建新的 Group
func NewSimplePoolGroup(opt *Option, gn GroupNewElementFunc) *SimplePoolGroup {
if opt == nil {
opt = &Option{}
}
ctx, cancel := context.WithCancel(context.Background())
sgOpt := opt.Clone()
sgOpt.MaxLifeTime = 0
minIdle := 5 * time.Minute
if sgOpt.MaxIdleTime < minIdle {
sgOpt.MaxIdleTime = minIdle
}
g := &SimplePoolGroup{
option: *opt.Clone(),
sgOption: *sgOpt,
done: cancel,
genNewEle: gn,
}
go g.poolCleaner(ctx, opt.shortestIdleTime())
return g
}
// SimplePoolGroup 通用的、 按照 key 分组的 Pool
//
// 配置的 Option 是针对每个 key 的。
// 如 MaxOpen=1,则允许每个 key 都最多创建1个实例
type SimplePoolGroup struct {
genNewEle GroupNewElementFunc
pools map[any]*groupPoolItem
done context.CancelFunc
option Option
sgOption Option
nextID uint64
mu sync.Mutex
closed bool
}
func (sg *SimplePoolGroup) Range(fn func(io.Closer) error) error {
sg.mu.Lock()
defer sg.mu.Unlock()
for _, pool := range sg.pools {
if err := pool.Range(fn); err != nil {
return err
}
}
return nil
}
func (sg *SimplePoolGroup) Option() Option {
return sg.option
}
// Get 依据分组 key 获取一个对象池中的对象
//
// 当对象使用完成后,调用 Close() 方法后会自动返回对象池
func (sg *SimplePoolGroup) Get(ctx context.Context, key any) (io.Closer, error) {
return sg.getPool(key).Get(ctx)
}
func (sg *SimplePoolGroup) getPool(key any) *groupPoolItem {
poolID := getPoolID(key)
sg.mu.Lock()
defer sg.mu.Unlock()
if sg.pools == nil {
sg.pools = make(map[any]*groupPoolItem)
}
p, has := sg.pools[poolID]
if !has {
fn := sg.genNewEle(key)
pool := NewSimplePool(&sg.option, fn)
pool.OnNewElement(func(el Element) {
// 设置全局的 nextID
trySetNextID(el, &sg.nextID)
})
p = newGroupPoolItem(pool)
sg.pools[poolID] = p
}
p.PEMarkUsing()
return p
}
// GroupStats Group 的状态信息
func (sg *SimplePoolGroup) GroupStats() GroupStats {
sg.mu.Lock()
defer sg.mu.Unlock()
gs := GroupStats{
Groups: make(map[any]Stats, len(sg.pools)),
All: Stats{
Open: !sg.closed,
},
}
if sg.pools == nil {
return gs
}
for key, p := range sg.pools {
ls := p.Stats()
gs.Groups[key] = ls
gs.All.Idle += ls.Idle
gs.All.NumOpen += ls.NumOpen
gs.All.Wait += ls.Wait
gs.All.InUse += ls.InUse
gs.All.WaitCount += ls.WaitCount
gs.All.WaitDuration += ls.WaitDuration
gs.All.MaxIdleClosed += ls.MaxIdleClosed
gs.All.MaxIdleTimeClosed += ls.MaxIdleTimeClosed
gs.All.MaxLifeTimeClosed += ls.MaxLifeTimeClosed
}
return gs
}
// Close 关闭对象池
func (sg *SimplePoolGroup) Close() error {
sg.done()
var err error
sg.mu.Lock()
sg.closed = true
if sg.pools != nil {
for _, p := range sg.pools {
if e := p.Close(); e != nil {
err = e
}
}
sg.pools = make(map[any]*groupPoolItem)
}
sg.mu.Unlock()
return err
}
func (sg *SimplePoolGroup) poolCleaner(ctx context.Context, d time.Duration) {
const minInterval = time.Minute
if d < minInterval {
d = minInterval
}
t := time.NewTicker(d)
defer t.Stop()
for {
select {
case <-ctx.Done():
return
case <-t.C:
}
sg.doCheckExpire()
}
}
func (sg *SimplePoolGroup) doCheckExpire() {
sg.mu.Lock()
defer sg.mu.Unlock()
if sg.pools == nil {
return
}
var expires []any
for k, p := range sg.pools {
if p.Active(sg.sgOption) != nil {
expires = append(expires, k)
_ = p.Close()
}
}
if len(expires) == 0 {
return
}
for _, k := range expires {
delete(sg.pools, k)
}
}
type groupPoolItem struct {
*MetaInfo
*SimplePool
}
func newGroupPoolItem(p *SimplePool) *groupPoolItem {
return &groupPoolItem{
MetaInfo: NewMetaInfo(),
SimplePool: p,
}
}
func getPoolID(key any) any {
if v, ok := key.(interface{ PoolID() any }); ok {
return v.PoolID()
}
if v, ok := key.(fmt.Stringer); ok {
return v.String()
}
return key
}