4. threadlocal of data sharing within the thread range

1 /**2 * Data sharing for thread-scoped classes3 * Core: Threadlocal class4 * Actual scene:5 * Hibernate's Getcurrentsession method is to get the existing session from the thread range, create a new one and bind to the thread if it does not exist6 * Struts binds all parameters in a request to a thread-scoped object7  * @authorYzl8  *9  */Ten  Public classThreadpart_4 { One      Public Static voidMain (string[] args) { A         NewThread (NewRunnable () { -              Public voidrun () { -Mythreadlocalobj obj =mythreadlocalobj.getinstance (); the                  while(Obj.getdata () <20){ - Obj.add (); -System.out.println (Thread.CurrentThread (). GetName () + "After Add Method value:" +obj.getdata ()); -                     //This operation is actually the same Mythreadlocalobj object +                     NewMyadd (). Add (); -System.out.println (Thread.CurrentThread (). GetName () + "After Myadd Add Method value:" +obj.getdata ()); +                     Try { AThread.Sleep (1000); at}Catch(interruptedexception e) { - e.printstacktrace (); -                     } -                 } -             } - }). Start (); in          -         NewThread (NewRunnable () { to              Public voidrun () { +Mythreadlocalobj obj =mythreadlocalobj.getinstance (); -                  while(Obj.getdata () >0){ the obj.sub (); *System.out.println (Thread.CurrentThread (). GetName () + "after sub method value:" +obj.getdata ()); $                     //This operation is actually the same Mythreadlocalobj objectPanax Notoginseng                     Newmysub (). Sub (); -System.out.println (Thread.CurrentThread (). GetName () + "after MySub sub method value:" +obj.getdata ()); the                     Try { +Thread.Sleep (1000); A}Catch(interruptedexception e) { the e.printstacktrace (); +                     } -                 } $             } $ }). Start (); -     } - } the  - classmyadd{Wuyi      Public voidAdd () { the mythreadlocalobj.getinstance (). Add (); -     } Wu } -  About classmysub{ $      Public voidSub () { - mythreadlocalobj.getinstance (). Sub (); -     } - } A  + /** the * In single-case mode - * thread-wide sharing $ * Non-impact outside the thread range the  * @authorYzl the  * the  */ the classmythreadlocalobj{ -     Private intdata = 10; in      the      Public voidAdd () { thedata++; About     } the      the      Public voidSub () { thedata--; +     } -      the     Privatemythreadlocalobj () {};Bayi     Private StaticThreadlocal<mythreadlocalobj> local =NewThreadlocal<mythreadlocalobj>(); the      the      -      Public Staticmythreadlocalobj getinstance () { -         if(Local.get () = =NULL){ theLocal.set (Newmythreadlocalobj ()); the         } the         returnlocal.get (); the     } -  the      Public intGetData () { the         returndata; the     }94}

Operation Result:

Objects that operate on different threads are not the same, and the same thread operates on the same

1 Thread-0 After Add method value:112 Thread-1 After sub method value:93 Thread-0 After Myadd Add method Value:124 Thread-1 After mysub sub method Value:85Thread-1 after sub method value:76Thread-0 after Add method value:137Thread-1 after MySub sub method value:68Thread-0 after Myadd Add method value:149Thread-1 after sub method value:5TenThread-0 after Add method value:15 OneThread-1 after MySub sub method value:4 AThread-0 after Myadd Add method value:16 -Thread-0 after Add method value:17 -Thread-1 after sub method value:3 theThread-0 after Myadd Add method value:18 -Thread-1 after MySub sub method value:2 -Thread-0 after Add method value:19 -Thread-0 after Myadd Add method value:20 +Thread-1 after sub method value:1 -Thread-1 after MySub sub method value:0

4, thread-scoped data sharing threadlocal