Multithreaded Programming Learning (9) Future pattern

Future pattern[order Pickup mode]

One: Participants in the future pattern
--->client (customer needs)
--->host (cake shop)
--->data (interface of bills and cakes)
--->future (cake bill)
--->readata (cake making process)


II: When will the future pattern pattern be used?
--->


Three: Thinking of the future pattern
--->

Four step instructions
--->

Data class Interface

1  Packagecom.yeepay.sxf.thread9;2 /**3 * Data interface for defining the method of obtaining "cake" success4  * @authorSXF5  *6  */7  Public InterfaceData {8     9     /**Ten * How to get the cake One      * @return A      */ -      Public AbstractString getcontent (); -}

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Cake class

1  Packagecom.yeepay.sxf.thread9;2 /**3 * The real job of making cakes4  * @authorSXF5  *6  */7  Public classRealdataImplementsData {8     //the real cake9     PrivateString content;Ten      One     //the process of making a cake A      PublicRealdata (String data,integer count) { -System.out.println ("The work of making cakes begins"); -StringBuffer buffer=NewStringBuffer (); the          for(inti=0;i<count;i++){ -Buffer.append (data+count); -             Try { -Thread.Sleep (1000); +}Catch(interruptedexception e) { -                 //TODO auto-generated Catch block + e.printstacktrace (); A             } at         } -Content=NewString (buffer); -System.out.println ("The end of the work of making cakes"); -          -     } -  in     /** - * Back to the made-up cake to      */ + @Override -      PublicString getcontent () { the         //TODO auto-generated Method Stub *         returncontent; $     }Panax Notoginseng      -      the}

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Tickets for the cake

1  Packagecom.yeepay.sxf.thread9;2 /**3 * Ticket for cake collection4  * @authorSXF5  *6  */7  Public classFuturedataImplementsData {8     //the real cake9     Privaterealdata data;Ten     //does the cake make good evidence? One     Private Booleanflag=false; A      -      Public synchronized voidSetrealdata (Realdata realdata) { -         if(flag) { the             return; -         } -          This. data=Realdata; -          This. flag=true; +         //cake Production is successful, the thread that wakes up the cake - notify (); +     } A      at      -      -     //get a cake through a ticket - @Override -      Public synchronizedString getcontent () { -         //TODO auto-generated Method Stub in         //If the cake is not made, go to the thread of the cake to rest -          while(!flag) { to             Try { + wait (); -}Catch(interruptedexception e) { the                 //TODO auto-generated Catch block * e.printstacktrace (); $             }Panax Notoginseng         } -         returndata.getcontent (); the     } +  A      the      +}

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Start the class that makes the cake thread

1  Packagecom.yeepay.sxf.thread9;2 /**3 * Start a new thread to make a cake4  * @authorSXF5  *6  */7  Public classHost {8     9     /**Ten * Request the standard for making cakes One      * @paramCount A      * @paramC -      * @return -      */ the      PublicData Request (Final intCountFinalString c) { -SYSTEM.OUT.PRINTLN ("Request +c+" and "+count+" to make the cake "); -         //the bill to build this cake -          FinalFuturedata Futuredata=NewFuturedata (); +         //making a cake takes time, starts a new thread, and makes a cake . -         NewThread () { +  A @Override at              Public voidrun () { -                 //thread body for making cakes -Realdata Realdata=NewRealdata (c, count); -                 //stuffing a prepared cake into a bill - Futuredata.setrealdata (realdata); -             } in              - }.start (); to          +System.out.println ("If the cake has been requested, give me a ticket to take the cake.")); -          the         returnFuturedata; *          $     }Panax Notoginseng}

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Simulate the main thread, first make cakes, go to busy other things, finish the class of cake

1  Packagecom.yeepay.sxf.thread9;2 /**3 * Analog Client4  * @authorSXF5  *6  */7  Public classTest {8     9      Public Static voidMain (string[] args) {TenHost host1=NewHost (); OneHost host2=NewHost (); A         //send request to get cake ticket -Data data=host1.request (2, "SXF")); -Data data2=host2.request (3, "* * *"); the         //I can go to other things. -System.out.println ("Host1 test.main (buy food and cook, go to the afternoon to pick up the cake)"); -          -         //Take the cake +String cake=data.getcontent (); -String cake2=data2.getcontent (); +         //Eat Cake ASystem.out.println ("Test.main (Host1) eate" +cake); atSystem.out.println ("Test.main (Host2). Eata" +cake2); -     } -  -}

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Multithreaded Programming Learning (9) Future pattern