go开源cache2go项目蛤蟆笔记——简单使用-

1 下载开源

下载路径：https://github.com/muesli/cache2go

2 代码如下：

packagemain

import(

"fmt"

"time"

"cache2go-master"

)

//Keys&valuesincache2gocanbeoffarbitrarytypes,e.g.astruct.

typemyStructstruct{

text string

moreData[]byte

}

funcmain(){

//Accessinganewcachetableforthefirsttimewillcreateit.

cache:=cache2go.Cache("myCache")

//Wewillputanewiteminthecache.Itwillexpireafter

//notbeingaccessedviaValue(key)formorethan5seconds.

val:=myStruct{"Thisisatest!",[]byte{}}

cache.Add("someKey",5*time.Second,&val)

//Let'sretrievetheitemfromthecache.

res,err:=cache.Value("someKey")

iferr==nil{

fmt.Println("Foundvalueincache:",res.Data().(*myStruct).text)

}else{

fmt.Println("Errorretrievingvaluefromcache:",err)

}

//Waitfortheitemtoexpireincache.

time.Sleep(6*time.Second)

res,err=cache.Value("someKey")

iferr!=nil{

fmt.Println("Itemisnotcached(anymore).")

}

//Addanotheritemthatneverexpires.

cache.Add("someKey",0,&val)

//cache2gosupportsafewhandycallbacksandloadingmechanisms.

cache.SetAboutToDeleteItemCallback(func(e*cache2go.CacheItem){

fmt.Println("Deleting:",e.Key(),e.Data().(*myStruct).text,e.CreatedOn())

})

//Removetheitemfromthecache.

cache.Delete("someKey")

//Andwipetheentirecachetable.

cache.Flush()

}

3 执行如下

Found value in cache: Thisis a test!

Item is not cached(anymore).

Deleting: someKey This is a test! 2016-07-12 16:31:57.0289334 +0800 CST