完成基于uint64的gcache模块改进开发

This commit is contained in:
John
2018-02-26 16:28:01 +08:00
parent ae71af0c21
commit 0db838a68c
3 changed files with 281 additions and 171 deletions

View File

@ -14,9 +14,10 @@ import (
"gitee.com/johng/gf/g/container/gset"
)
var ints = gset.NewIntSet()
var itfs = gset.NewInterfaceSet()
var strs = gset.NewStringSet()
var ints = gset.NewIntSet()
var uints = gset.NewUintSet()
var itfs = gset.NewInterfaceSet()
var strs = gset.NewStringSet()
func BenchmarkIntSet_Add(b *testing.B) {
for i := 0; i < b.N; i++ {
@ -36,6 +37,24 @@ func BenchmarkIntSet_Remove(b *testing.B) {
}
}
func BenchmarkUintSet_Add(b *testing.B) {
for i := 0; i < b.N; i++ {
uints.Add(uint(i))
}
}
func BenchmarkUintSet_Contains(b *testing.B) {
for i := 0; i < b.N; i++ {
uints.Contains(uint(i))
}
}
func BenchmarkUintSet_Remove(b *testing.B) {
for i := 0; i < b.N; i++ {
uints.Remove(uint(i))
}
}
func BenchmarkInterfaceSet_Add(b *testing.B) {
for i := 0; i < b.N; i++ {
itfs.Add(i)

View File

@ -0,0 +1,97 @@
// Copyright 2017 gf Author(https://gitee.com/johng/gf). All Rights Reserved.
//
// This Source Code Form is subject to the terms of the MIT License.
// If a copy of the MIT was not distributed with this file,
// You can obtain one at https://gitee.com/johng/gf.
//
package gset
import (
"fmt"
"sync"
)
type UintSet struct {
mu sync.RWMutex
m map[uint]struct{}
}
func NewUintSet() *UintSet {
return &UintSet{m: make(map[uint]struct{})}
}
// 给定回调函数对原始内容进行遍历
func (this *UintSet) Iterator(f func (v uint)) {
this.mu.RLock()
for k, _ := range this.m {
f(k)
}
this.mu.RUnlock()
}
// 添加
func (this *UintSet) Add(item uint) *UintSet {
this.mu.Lock()
this.m[item] = struct{}{}
this.mu.Unlock()
return this
}
// 批量添加
func (this *UintSet) BatchAdd(items []uint) *UintSet {
this.mu.Lock()
for _, item := range items {
this.m[item] = struct{}{}
}
this.mu.Unlock()
return this
}
// 键是否存在
func (this *UintSet) Contains(item uint) bool {
this.mu.RLock()
_, exists := this.m[item]
this.mu.RUnlock()
return exists
}
// 删除键值对
func (this *UintSet) Remove(key uint) {
this.mu.Lock()
delete(this.m, key)
this.mu.Unlock()
}
// 大小
func (this *UintSet) Size() int {
this.mu.RLock()
l := len(this.m)
this.mu.RUnlock()
return l
}
// 清空set
func (this *UintSet) Clear() {
this.mu.Lock()
this.m = make(map[uint]struct{})
this.mu.Unlock()
}
// 转换为数组
func (this *UintSet) Slice() []uint {
this.mu.RLock()
i := 0
ret := make([]uint, len(this.m))
for item := range this.m {
ret[i] = item
i++
}
this.mu.RUnlock()
return ret
}
// 转换为字符串
func (this *UintSet) String() string {
return fmt.Sprint(this.Slice())
}

View File

@ -4,33 +4,28 @@
// If a copy of the MIT was not distributed with this file,
// You can obtain one at https://gitee.com/johng/gf.
// 单进程缓存.
// @todo 需要新增一个MAP用于时间与过期键值对的快速处理。
// 单进程高速缓存.
package gcache
import (
"sync"
"time"
"math"
"gitee.com/johng/gf/g/os/gtime"
"gitee.com/johng/gf/g/encoding/ghash"
)
const (
gDEFAULT_CACHE_GROUP_SIZE = 4 // 默认缓存分区大小不能超过uint8的最大值
"gitee.com/johng/gf/g/container/gset"
"gitee.com/johng/gf/g/container/gqueue"
)
// 缓存对象
type Cache struct {
sync.RWMutex
g uint8 // 分区大小
m map[uint8]*CacheMap // 以分区大小数字作为索引
}
// 缓存分区对象
type CacheMap struct {
sync.RWMutex
closed bool // 对象是否已删除以便判断停止goroutine
m map[string]CacheItem // 键值对
dmu sync.RWMutex // data锁
emu sync.RWMutex // ekmap锁
data map[uint64]CacheItem // 缓存数据(使用键名哈希作为键)
ekmap map[uint64]int64 // 键名哈希对应的分组过期时间
eksets map[int64]*gset.UintSet // 分组过期时间对应的键名哈希列表
eventQueue *gqueue.Queue // 异步处理队列
stopEvents chan struct{} // 关闭时间通知
}
// 缓存数据项
@ -39,209 +34,208 @@ type CacheItem struct {
e int64 // 过期时间
}
// 异步队列数据项
type EventItem struct {
k uint64 // 键名uint64哈希值
e int64 // 过期时间
}
// 全局缓存管理对象
var cache *Cache = New(gDEFAULT_CACHE_GROUP_SIZE)
var cache *Cache = New()
// Cache对象按照缓存键名首字母做了分组
func New(group uint8) *Cache {
func New() *Cache {
c := &Cache {
g : group,
m : make(map[uint8]*CacheMap),
}
// 初始化分区对象
var i uint8 = 0
for ; i < group; i++ {
m := &CacheMap {
m : make(map[string]CacheItem),
}
c.m[i] = m
go m.autoClearLoop()
data : make(map[uint64]CacheItem),
ekmap : make(map[uint64]int64),
eksets : make(map[int64]*gset.UintSet),
eventQueue : gqueue.New(),
stopEvents : make(chan struct{}, 2),
}
go c.autoSyncLoop()
go c.autoClearLoop()
return c
}
// (使用全局KV缓存对象)设置kv缓存键值对过期时间单位为毫秒
func Set(k string, v interface{}, expired int64) {
cache.Set(k, v, expired)
func Set(key string, value interface{}, expire int64) {
cache.Set(key, value, expire)
}
// (使用全局KV缓存对象)批量设置kv缓存键值对过期时间单位为毫秒
func BatchSet(m map[string]interface{}, expired int64) {
cache.BatchSet(m, expired)
func BatchSet(data map[string]interface{}, expire int64) {
cache.BatchSet(data, expire)
}
// (使用全局KV缓存对象)获取指定键名的值
func Get(k string) interface{} {
return cache.Get(k)
func Get(key string) interface{} {
return cache.Get(key)
}
// (使用全局KV缓存对象)删除指定键值对
func Remove(k string) {
cache.Remove(k)
func Remove(key string) {
cache.Remove(key)
}
// (使用全局KV缓存对象)批量删除指定键值对
func BatchRemove(l []string) {
cache.BatchRemove(l)
func BatchRemove(keys []string) {
cache.BatchRemove(keys)
}
// 设置kv缓存键值对过期时间单位为毫秒
func (c *Cache) Set(k string, v interface{}, expired int64) {
c.RLock()
c.m[c.getIndex(k)].Set(k, v, expired)
c.RUnlock()
// 计算过期缓存的键名
func (c *Cache) makeExpireKey(expire int64) int64 {
return int64(math.Ceil(float64(expire/1000) + 1)*1000)
}
// 获取一个过期键名存放Set,如果没有则返回nil
func (c *Cache) getExpireSet(expire int64) *gset.UintSet {
c.emu.RLock()
if ekset, ok := c.eksets[expire]; ok {
c.emu.RUnlock()
return ekset
}
c.emu.RUnlock()
return nil
}
// 获取或者创建一个过期键名存放Set(由于是异步单线程执行因此不会出现创建set时的覆盖问题)
func (c *Cache) getOrNewExpireSet(expire int64) *gset.UintSet {
if ekset := c.getExpireSet(expire); ekset == nil {
set := gset.NewUintSet()
c.emu.Lock()
c.eksets[expire] = set
c.emu.Unlock()
return set
} else {
return ekset
}
}
// 设置kv缓存键值对过期时间单位为毫秒expire<=0表示不过期
func (c *Cache) Set(key string, value interface{}, expire int64) {
e := int64(math.MaxInt64)
if expire > 0 {
e = gtime.Millisecond() + int64(expire)
}
h := ghash.BKDRHash64([]byte(key))
c.dmu.Lock()
c.data[h] = CacheItem{v: value, e: e}
c.dmu.Unlock()
c.eventQueue.PushBack(EventItem{k:h, e:e})
}
// 批量设置
func (c *Cache) BatchSet(m map[string]interface{}, expired int64) {
c.RLock()
for k, v := range m {
c.m[c.getIndex(k)].Set(k, v, expired)
func (c *Cache) BatchSet(data map[string]interface{}, expire int64) {
e := int64(math.MaxInt64)
if expire > 0 {
e = gtime.Millisecond() + int64(expire)
}
for k, v := range data {
h := ghash.BKDRHash64([]byte(k))
c.dmu.Lock()
c.data[h] = CacheItem{v: v, e: e}
c.dmu.Unlock()
c.eventQueue.PushBack(EventItem{k:h, e:e})
}
c.RUnlock()
}
// 获取指定键名的值
func (c *Cache) Get(k string) interface{} {
c.RLock()
r := c.m[c.getIndex(k)].Get(k)
c.RUnlock()
return r
func (c *Cache) Get(key string) interface{} {
c.dmu.RLock()
item, ok := c.data[ghash.BKDRHash64([]byte(key))]
c.dmu.RUnlock()
if ok {
if item.e > gtime.Millisecond() {
return item.v
}
}
return nil
}
// 删除指定键值对
func (c *Cache) Remove(k string) {
c.RLock()
c.m[c.getIndex(k)].Remove(k)
c.RUnlock()
func (c *Cache) Remove(key string) {
c.Set(key, nil, -1)
}
// 批量删除键值对
func (c *Cache) BatchRemove(l []string) {
c.RLock()
for _, k := range l {
c.m[c.getIndex(k)].Remove(k)
func (c *Cache) BatchRemove(keys []string) {
for _, key := range keys {
h := ghash.BKDRHash64([]byte(key))
c.dmu.Lock()
c.data[h] = CacheItem{v: nil, e: -1}
c.dmu.Unlock()
c.eventQueue.PushBack(EventItem{k:h, e: -1})
}
c.RUnlock()
}
// 获得所有的键名,组成字符串数组返回
func (c *Cache) Keys() []string {
l := make([]string, 0)
c.RLock()
for _, cm := range c.m {
cm.RLock()
for k2, _ := range cm.m {
l = append(l, k2)
}
cm.RUnlock()
}
c.RUnlock()
return l
}
// 获得所有的值,组成数组返回
func (c *Cache) Values() []interface{} {
l := make([]interface{}, 0)
c.RLock()
for _, cm := range c.m {
cm.RLock()
for _, v2 := range cm.m {
l = append(l, v2.v)
}
cm.RUnlock()
}
c.RUnlock()
return l
}
//func (c *Cache) Keys() []string {
// return append(c.temp.Keys(), c.data.Keys()...)
//}
//
//// 获得所有的值,组成数组返回
//func (c *Cache) Values() []interface{} {
// return append(c.temp.Values(), c.data.Values()...)
//}
// 获得缓存对象的键值对数量
func (c *Cache) Size() int {
var size int
c.RLock()
for _, cm := range c.m {
cm.RLock()
size += len(cm.m)
cm.RUnlock()
}
c.RUnlock()
return size
c.dmu.RLock()
length := len(c.data)
c.dmu.RUnlock()
return length
}
// 删除缓存对象
func (c *Cache) Close() {
c.RLock()
for _, cm := range c.m {
cm.Close()
}
c.RUnlock()
c.stopEvents <- struct{}{}
c.eventQueue.Close()
}
// 计算缓存的索引
func (c *Cache) getIndex(k string) uint8 {
return uint8(ghash.BKDRHash([]byte(k)) % uint32(c.g))
}
// 设置kv缓存键值对过期时间单位为毫秒
func (cm *CacheMap) Set(k string, v interface{}, expired int64) {
var e int64
if expired > 0 {
e = gtime.Millisecond() + int64(expired)
}
cm.Lock()
cm.m[k] = CacheItem{v: v, e: e}
cm.Unlock()
}
// 获取指定键名的值
func (cm *CacheMap) Get(k string) interface{} {
var v interface{}
cm.RLock()
if r, ok := cm.m[k]; ok {
if r.e > 0 && r.e < gtime.Millisecond() {
v = nil
} else {
v = r.v
}
}
cm.RUnlock()
return v
}
// 删除指定键值对
func (cm *CacheMap) Remove(k string) {
cm.Lock()
delete(cm.m, k)
cm.Unlock()
}
// 关闭缓存分区
func (cm *CacheMap) Close() {
cm.Lock()
cm.closed = true
cm.Unlock()
}
// 是否删除
func (cm *CacheMap) isClosed() bool {
cm.RLock()
r := cm.closed
cm.RUnlock()
return r
}
// 自动清理过期键值对(每间隔3秒执行)
func (cm *CacheMap) autoClearLoop() {
for !cm.isClosed() {
cm.Lock()
for k, v := range cm.m {
if v.e > 0 && v.e < gtime.Millisecond() {
delete(cm.m, k)
// 数据自动同步循环
func (c *Cache) autoSyncLoop() {
for {
if r := c.eventQueue.PopFront(); r != nil {
item := r.(EventItem)
newe := c.makeExpireKey(item.e)
if olde, ok := c.ekmap[item.k]; ok {
if newe != olde {
if ekset := c.getExpireSet(olde); ekset != nil {
ekset.Remove(uint(item.k))
}
}
}
c.getOrNewExpireSet(newe).Add(uint(item.k))
c.ekmap[item.k] = newe
} else {
break
}
cm.Unlock()
time.Sleep(3 * time.Second)
}
}
// 自动清理过期键值对
// 每隔1秒清除过去3秒的键值对数据
func (c *Cache) autoClearLoop() {
for {
select {
case <- c.stopEvents:
return
default:
ek := c.makeExpireKey(gtime.Millisecond())
eks := []int64{ek - 2000, ek - 3000, ek - 4000}
for _, v := range eks {
if ekset := c.getExpireSet(v); ekset != nil {
c.dmu.Lock()
ekset.Iterator(func(v uint) {
delete(c.data, uint64(v))
})
c.dmu.Unlock()
}
c.emu.Lock()
delete(c.eksets, v)
c.emu.Unlock()
}
time.Sleep(time.Second)
}
}
}