<%
'**********************************************
'vbsCache类
'属性valid,是否可用,取值前判断
'属性name,cache名,新建对象后赋值
'方法add(值,到期时间),设置cache内容
'属性value,返回cache内容
'属性blempty,是否未设置值
'方法makeEmpty,释放内存,测试用
'方法equal(变量1),判断cache值是否和变量1相同
'方法expires(time),修改过期时间为time
'木鸟写的缓存类
'**********************************************
classCache
privateobj'cache内容
privateexpireTime'过期时间
privateexpireTimeName'过期时间application名
privatecacheName'cache内容application名
privatepath'uri
privatesubclass_initialize()
path=request.servervariables("url")
path=left(path,instrRev(path,"/"))
endsub
privatesubclass_terminate()
endsub
publicpropertygetblEmpty
'是否为空
ifisempty(obj)then
blEmpty=true
else
blEmpty=false
endif
endproperty
publicpropertygetvalid
'是否可用(过期)
ifisempty(obj)ornotisDate(expireTime)then
valid=false
elseifCDate(expireTime)<nowthen
valid=false
else
valid=true
endif
endproperty
publicpropertyletname(str)
'设置cache名
cacheName=str&path
obj=application(cacheName)
expireTimeName=str&"expires"&path
expireTime=application(expireTimeName)
endproperty
publicpropertyletexpires(tm)
'重设置过期时间
expireTime=tm
application.lock
application(expireTimeName)=expireTime
application.unlock
endproperty
publicsubadd(var,expire)
'赋值
ifisempty(var)ornotisDate(expire)then
exitsub
endif
obj=var
expireTime=expire
application.lock
application(cacheName)=obj
application(expireTimeName)=expireTime
application.unlock
endsub
publicpropertygetvalue
'取值
ifisempty(obj)ornotisDate(expireTime)then
value=null
elseifCDate(expireTime)<nowthen
value=null
else
value=obj
endif
endproperty
publicsubmakeEmpty()
'释放application
application.lock
application(cacheName)=empty
application(expireTimeName)=empty
application.unlock
obj=empty
expireTime=empty
endsub
publicfunctionequal(var2)
'比较
iftypename(obj)<>typename(var2)then
equal=false
elseiftypename(obj)="Object"then
ifobjisvar2then
equal=true
else
equal=false
endif
elseiftypename(obj)="Variant()"then
ifjoin(obj,"^")=join(var2,"^")then
equal=true
else
equal=false
endif
else
ifobj=var2then
equal=true
else
equal=false
endif
endif
endfunction
endclass
dimcontent,myCache
SetmyCache=newCache
myCache.name="sofoisndoffo"'定义缓存名称
ifmyCache.validthen'如果缓存有效
content=myCache.value'读取缓存内容
else
content="sosuo8.com测试"'大量内容,可以是非常耗时大量数据库查询记录集
myCache.addcontent,dateadd("n",1000,now)'将内容赋值给缓存,并设置缓存有效期是当前时间+1000分钟
endif
Response.Write(content)
'myCache.makeEmpty()
setclsCache=nothing'释放对象
%>