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merge.go
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merge.go
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// Copyright (c) 2023, donnie <donnie4w@gmail.com>
// All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
//
// github.com/donnie4w/tldb
package level1
import (
"context"
"errors"
"sync"
"sync/atomic"
"time"
. "github.com/donnie4w/tldb/container"
. "github.com/donnie4w/tldb/lock"
. "github.com/donnie4w/tldb/stub"
)
/*****************************************/
var mergeSyncTxWare = NewMap[int64, Merge[*syncBean, map[int64]int8]]()
var numlock = NewNumLock(1 << 6)
type UUID int64
func (this UUID) syncTxMerge(syncList map[int64]int8) (err error) {
defer errRecover()
i := 10
for i > 0 {
i--
if tc := nodeWare.GetTlContext(int64(this)); tc != nil {
if err = tc.Conn.SyncTxMerge(context.Background(), syncList); err == nil {
break
}
} else {
<-time.After(1 * time.Second)
}
}
return
}
func (this UUID) syncTxAdd(sb *syncBean, cancelfunc func() bool, f func(bs map[int64]int8) error) {
var mst Merge[*syncBean, map[int64]int8]
var ok bool
if mst, ok = mergeSyncTxWare.Get(int64(this)); !ok {
numlock.Lock(int64(this))
defer numlock.Unlock(int64(this))
if mst, ok = mergeSyncTxWare.Get(int64(this)); !ok {
mst = NewMergeSyncTx()
mergeSyncTxWare.Put(int64(this), mst)
}
}
mst.Add(sb)
go mst.CallBack(cancelfunc, f)
}
func (this UUID) syncTxDel() {
mergeSyncTxWare.Del(int64(this))
}
/*********************************************************************/
func NewMergeSyncTx() Merge[*syncBean, map[int64]int8] {
return &mergeSyncTx[*syncBean, map[int64]int8]{mmap: NewMapL[int64, *syncBean](), mux: &sync.Mutex{}}
}
type syncBean struct {
SyncId int64
Result int8
}
type mergeSyncTx[T *syncBean, V map[int64]int8] struct {
mmap *MapL[int64, *syncBean]
seq int64
cursor int64
mux *sync.Mutex
mergeSize int8
}
func (this *mergeSyncTx[T, V]) Add(sb *syncBean) {
i := atomic.AddInt64(&this.seq, 1)
this.mmap.Put(i, sb)
}
func (this *mergeSyncTx[T, V]) Del(endId int64) {
this.mmap.Del(endId)
}
func (this *mergeSyncTx[T, V]) Get(id int64) (_r *syncBean, ok bool) {
_r, ok = this.mmap.Get(id)
return
}
func (this *mergeSyncTx[T, V]) Len() int64 {
return this.mmap.Len()
}
func (this *mergeSyncTx[T, V]) SetZlib(on bool) {
}
func (this *mergeSyncTx[T, V]) MergeSize(size int8) {
this.mergeSize = size
}
func (this *mergeSyncTx[T, V]) CallBack(cancelfunc func() bool, f func(bs map[int64]int8) error) (err error) {
if this.mux.TryLock() {
defer this.mux.Unlock()
} else {
return
}
for this.Len() > 0 && this.seq > this.cursor && !cancelfunc() {
if mb, err := this.getMergeBean(); err == nil {
f(mb)
}
}
return
}
func (this *mergeSyncTx[T, V]) getMergeBean() (_r V, err error) {
defer errRecover()
size := 1 << 20
_r = make(map[int64]int8, 0)
start, end := this.cursor+1, this.cursor+1
for i := start; size > 0 && i <= this.seq; i++ {
var sb *syncBean
var ok bool
for {
if sb, ok = this.Get(i); ok {
break
} else {
<-time.After(1 * time.Nanosecond)
}
}
size = size - 9
_r[sb.SyncId] = sb.Result
end = i
}
if len(_r) > 0 {
for i := start; i <= end; i++ {
this.Del(i)
}
this.cursor = end
} else {
err = errors.New("")
}
return
}