Finish all the i18n things of code.

This commit is contained in:
zicla
2019-05-06 02:18:08 +08:00
parent e37b248c8c
commit 54c5905a58
38 changed files with 504 additions and 720 deletions

View File

@ -8,27 +8,25 @@ import (
"time"
)
//缓存项
//主要借鉴了cache2go https://github.com/muesli/cache2go
//cache2go https://github.com/muesli/cache2go
type Item struct {
sync.RWMutex //读写锁
//缓存键
key interface{}
//缓存值
//read write lock
sync.RWMutex
key interface{}
data interface{}
// 缓存项的生命期
// cache duration.
duration time.Duration
//创建时间
// create time
createTime time.Time
//最后访问时间
//last access time
accessTime time.Time
//访问次数
//visit times
count int64
// 在删除缓存项之前调用的回调函数
// callback after deleting
deleteCallback func(key interface{})
}
//新建一项缓存
//create item.
func NewItem(key interface{}, duration time.Duration, data interface{}) *Item {
t := time.Now()
return &Item{
@ -42,7 +40,7 @@ func NewItem(key interface{}, duration time.Duration, data interface{}) *Item {
}
}
//手动获取一下,保持该项
//keep alive
func (item *Item) KeepAlive() {
item.Lock()
defer item.Unlock()
@ -50,73 +48,63 @@ func (item *Item) KeepAlive() {
item.count++
}
//返回生命周期
func (item *Item) Duration() time.Duration {
return item.duration
}
//返回访问时间。可能并发,加锁
func (item *Item) AccessTime() time.Time {
item.RLock()
defer item.RUnlock()
return item.accessTime
}
//返回创建时间
func (item *Item) CreateTime() time.Time {
return item.createTime
}
//返回访问时间。可能并发,加锁
func (item *Item) Count() int64 {
item.RLock()
defer item.RUnlock()
return item.count
}
//返回key值
func (item *Item) Key() interface{} {
return item.key
}
//返回数据
func (item *Item) Data() interface{} {
return item.data
}
//设置回调函数
func (item *Item) SetDeleteCallback(f func(interface{})) {
item.Lock()
defer item.Unlock()
item.deleteCallback = f
}
// 统一管理缓存项的表
// table for managing cache items
type Table struct {
sync.RWMutex
//所有缓存项
//all cache items
items map[interface{}]*Item
// 触发缓存清理的定时器
// trigger cleanup
cleanupTimer *time.Timer
// 缓存清理周期
// cleanup interval
cleanupInterval time.Duration
// 获取一个不存在的缓存项时的回调函数
loadData func(key interface{}, args ...interface{}) *Item
// 向缓存表增加缓存项时的回调函数
loadData func(key interface{}, args ...interface{}) *Item
// callback after adding.
addedCallback func(item *Item)
// 从缓存表删除一个缓存项时的回调函数
// callback after deleting
deleteCallback func(item *Item)
}
// 返回缓存中存储有多少项
func (table *Table) Count() int {
table.RLock()
defer table.RUnlock()
return len(table.items)
}
// 遍历所有项
func (table *Table) Foreach(trans func(key interface{}, item *Item)) {
table.RLock()
defer table.RUnlock()
@ -126,40 +114,34 @@ func (table *Table) Foreach(trans func(key interface{}, item *Item)) {
}
}
// SetDataLoader配置一个数据加载的回调当尝试去请求一个不存在的key的时候调用
func (table *Table) SetDataLoader(f func(interface{}, ...interface{}) *Item) {
table.Lock()
defer table.Unlock()
table.loadData = f
}
// 添加时的回调函数
func (table *Table) SetAddedCallback(f func(*Item)) {
table.Lock()
defer table.Unlock()
table.addedCallback = f
}
// 删除时的回调函数
func (table *Table) SetDeleteCallback(f func(*Item)) {
table.Lock()
defer table.Unlock()
table.deleteCallback = f
}
//带有panic恢复的方法
func (table *Table) RunWithRecovery(f func()) {
defer func() {
if err := recover(); err != nil {
//core.LOGGER.Error("异步任务错误: %v", err)
fmt.Printf("occur error %v \r\n", err)
}
}()
//执行函数
f()
}
//终结检查,被自调整的时间触发
func (table *Table) checkExpire() {
table.Lock()
if table.cleanupTimer != nil {
@ -171,39 +153,39 @@ func (table *Table) checkExpire() {
table.log("Expiration check installed for table")
}
// 为了不抢占锁,采用临时的items.
// in order to not take the lock. use temp items.
items := table.items
table.Unlock()
//为了定时器更准确我们需要在每一个循环中更新now不确定是否是有效率的。
//in order to make timer more precise, update now every loop.
now := time.Now()
smallestDuration := 0 * time.Second
for key, item := range items {
// 取出我们需要的东西,为了不抢占锁
//take out our things, in order not to take the lock.
item.RLock()
duration := item.duration
accessTime := item.accessTime
item.RUnlock()
// 0永久有效
// 0 means valid.
if duration == 0 {
continue
}
if now.Sub(accessTime) >= duration {
//缓存项已经过期
//cache item expired.
_, e := table.Delete(key)
if e != nil {
table.log("删除缓存项时出错 %v", e.Error())
table.log("occur error while deleting %v", e.Error())
}
} else {
//查找最靠近结束生命周期的项目
//find the most possible expire item.
if smallestDuration == 0 || duration-now.Sub(accessTime) < smallestDuration {
smallestDuration = duration - now.Sub(accessTime)
}
}
}
// 为下次清理设置间隔,自触发机制
//trigger next clean
table.Lock()
table.cleanupInterval = smallestDuration
if smallestDuration > 0 {
@ -214,26 +196,23 @@ func (table *Table) checkExpire() {
table.Unlock()
}
// 添加缓存项
// add item
func (table *Table) Add(key interface{}, duration time.Duration, data interface{}) *Item {
item := NewItem(key, duration, data)
// 将缓存项放入表中
table.Lock()
table.log("Adding item with key %v and lifespan of %v to table", key, duration)
table.items[key] = item
// 取出需要的东西,释放锁
expDur := table.cleanupInterval
addedItem := table.addedCallback
table.Unlock()
// 有回调函数便执行回调
if addedItem != nil {
addedItem(item)
}
// 如果我们没有设置任何心跳检查定时器或者找一个即将迫近的项目
//find the most possible expire item.
if duration > 0 && (expDur == 0 || duration < expDur) {
table.checkExpire()
}
@ -241,20 +220,17 @@ func (table *Table) Add(key interface{}, duration time.Duration, data interface{
return item
}
// 从缓存中删除项
func (table *Table) Delete(key interface{}) (*Item, error) {
table.RLock()
r, ok := table.items[key]
if !ok {
table.RUnlock()
return nil, errors.New(fmt.Sprintf("没有找到%s对应的记录", key))
return nil, errors.New(fmt.Sprintf("no item with key %s", key))
}
// 取出要用到的东西,释放锁
deleteCallback := table.deleteCallback
table.RUnlock()
// 调用删除回调函数
if deleteCallback != nil {
deleteCallback(r)
}
@ -273,7 +249,7 @@ func (table *Table) Delete(key interface{}) (*Item, error) {
return r, nil
}
//单纯的检查某个键是否存在
//check exist.
func (table *Table) Exists(key interface{}) bool {
table.RLock()
defer table.RUnlock()
@ -282,7 +258,7 @@ func (table *Table) Exists(key interface{}) bool {
return ok
}
//如果存在返回false. 如果不存在,就去添加一个键,并且返回true
//if exist, return false. if not exist add a key and return true.
func (table *Table) NotFoundAdd(key interface{}, lifeSpan time.Duration, data interface{}) bool {
table.Lock()
@ -295,24 +271,20 @@ func (table *Table) NotFoundAdd(key interface{}, lifeSpan time.Duration, data in
table.log("Adding item with key %v and lifespan of %v to table", key, lifeSpan)
table.items[key] = item
// 取出需要的内容,释放锁
expDur := table.cleanupInterval
addedItem := table.addedCallback
table.Unlock()
// 添加回调函数
if addedItem != nil {
addedItem(item)
}
// 触发过期检查
if lifeSpan > 0 && (expDur == 0 || lifeSpan < expDur) {
table.checkExpire()
}
return true
}
//从缓存中返回一个被标记的并保持活性的值。你可以传附件的参数到DataLoader回调函数
func (table *Table) Value(key interface{}, args ...interface{}) (*Item, error) {
table.RLock()
r, ok := table.items[key]
@ -320,12 +292,11 @@ func (table *Table) Value(key interface{}, args ...interface{}) (*Item, error) {
table.RUnlock()
if ok {
// 更新访问次数和访问时间
//update visit count and visit time.
r.KeepAlive()
return r, nil
}
// 有加载数据的方式就通过loadData函数去加载进来
if loadData != nil {
item := loadData(key, args...)
if item != nil {
@ -333,14 +304,13 @@ func (table *Table) Value(key interface{}, args ...interface{}) (*Item, error) {
return item, nil
}
return nil, errors.New("无法加载到缓存值")
return nil, errors.New("cannot load item")
}
//没有找到任何东西返回nil.
return nil, nil
}
// 删除缓存表中的所有项目
// truncate a table.
func (table *Table) Truncate() {
table.Lock()
defer table.Unlock()
@ -354,7 +324,7 @@ func (table *Table) Truncate() {
}
}
//辅助table中排序统计的
//support table sort
type ItemPair struct {
Key interface{}
AccessCount int64
@ -366,7 +336,7 @@ func (p ItemPairList) Swap(i, j int) { p[i], p[j] = p[j], p[i] }
func (p ItemPairList) Len() int { return len(p) }
func (p ItemPairList) Less(i, j int) bool { return p[i].AccessCount > p[j].AccessCount }
// 返回缓存表中被访问最多的项目
//return most visited.
func (table *Table) MostAccessed(count int64) []*Item {
table.RLock()
defer table.RUnlock()
@ -396,12 +366,11 @@ func (table *Table) MostAccessed(count int64) []*Item {
return r
}
// 打印日志
// print log.
func (table *Table) log(format string, v ...interface{}) {
//core.LOGGER.Info(format, v...)
fmt.Printf(format, v)
}
//新建一个缓存Table
func NewTable() *Table {
return &Table{
items: make(map[interface{}]*Item),