Single case design mode global Cache Accesstoken

Using the JS-SDK development of small partners, read the document often see this sentence: (Below is a part of the development document, the exact words)

The phrase is: The developer must be in their own service global cache Access_token,jsapi_ticket

The following is a global cache using singleton mode. (Of course you can also deposit the database, which is called instantiation.) Then every time from the database, and then get a timer refresh, the landlord used this way, but found that it is a waste of time, wasting energy, not recommended. This is a good way to give you the following. ）

Singleton mode: As the name implies, there is only one instance of a class in the system. Regardless of how many classes are calling it, it is a. This allows the data to be shared when each class is called.

/** * @authorXulei * @description single case design mode cache Accesstoken Jsapi_ticket*/ Public classSingleton {//The cache Accesstoken Map,map contains a accesstoken and a cached timestamp    Privatemap<string, string> map =NewHashmap<string,string>(); PrivateSingleton () {}Private StaticSingleton single =NULL; //Static Factory Method     Public StaticSingleton getinstance () {if(single =NULL) { single=NewSingleton (); }        returnSingle ; }     PublicMap<string, string>Getmap () {returnmap; }     Public voidSetmap (map<string, string>map) {         This. Map =map; }     Public StaticSingleton Getsingle () {returnSingle ; }     Public Static voidSetSingle (Singleton single) {Singleton.single=Single ; }        /*** Get Accesstoken Jsapi_ticket has been added to the cache mechanism *@paramAppID *@paramAppsecret *@return     */     PublicMap<string,object>Getaccesstokenandjsapiticket (String AppID, String appsecret) {Map<String,Object> result =NewHashmap<string,object>(); Singleton Singleton=singleton.getinstance (); Map<string, string> map =Singleton.getmap (); String Time= Map.get ("Time");//take the data from the cacheString Accesstoken = Map.get ("Access_token");//take the data from the cacheString Jsapiticket = Map.get ("Jsapiticket");//take the data from the cacheLong nowdate =NewDate (). GetTime (); //set the expiration time here 3000*1000 just fine.        if(Accesstoken! =NULL&& Time! =NULL&& Nowdate-long.parselong (Time) < 3000 * 1000) {System.out.println ("-----read Access_token from cache:" +Accesstoken); //take data from the cache to assign a value to the returned resultResult.put ("Access_token", Accesstoken); Result.put ("Jsapiticket", Jsapiticket); } Else{Map<String,Object> info =Jsdkutil.getjsapiticket (AppID, Appsecret);//actually here you have to call the interface to get Accesstoken and Jsapiticket.//placing information in the cacheMap.put ("Time", Nowdate + "" "); Map.put ("Access_token", String.valueof (Info.get ("Access_token"))); Map.put ("Jsapiticket", String.valueof (Info.get ("Jsapiticket"))); //assign a value to the returned resultResult.put ("Access_token", Info.get ("Access_token")); Result.put ("Jsapiticket", Info.get ("Jsapiticket")); }        returnresult; }}

Then in the place used directly: Singleton.getinstance (). Getaccesstokenandjsapiticket (Appid,appsecret);

Single case design mode global Cache Accesstoken