Akka working with the future Functionally_map method

Akka working with the future Functionally_map method

Look at the code,

Package com.usoft;import akka.dispatch.executioncontexts;import akka.dispatch.futures;import  akka.dispatch.mapper;import akka.dispatch.oncomplete;import akka.dispatch.onfailure;import  akka.dispatch.OnSuccess;import scala.concurrent.ExecutionContextExecutorService;import  scala.concurrent.future;import java.util.concurrent.callable;import java.util.concurrent.executors;/ ** * created by liyanxin on 2015/1/8. */public class futuredemo  {    public static void main (string args[])  {   The       //  execution context can specify the thread pool type itself         //   needs a executioncontext as its executor        // future  Need a executioncontext,  it's very similar to java.util.concurrent.executor  .         //  If you have a  ac within the scopetorsystem ,  It can be used as a  executioncontext with System.dispatcher ().         //  You can also use executioncontext         //  the factory method provided by the associated object to bring  Executors  and  ExecutorServices  to the parcel,  Or even create your own instances.         executioncontextexecutorservice ec =  ExecutionContexts.                 fromexecutorservice (Executors.newcachedthreadpool ());         future<string> f1 = futures.future (new callable<string> ()  {             public string call ()  throws  InterruptedException {                 thread.sleep ( //), which blocks within the current thread for 5 seconds &NBSP;&NBSP;&NBSP;&NBsp;            system.out.println ( Thread.CurrentThread (). GetName ()  +  " thread end| | | F1 ");                 return   "Hello"  +  "World";             } &NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;},&NBSP;EC);         /* *         *  through the Map method  f1 -> f2          * Now we have a second Future,          * f2, that will eventually contain  an Integer. When our original Future, f1, completes, it  will also apply our          * function and complete the second future with its result.  When we finally get the result, it will contain the          * number 10. our original future  still contains the string  "HelloWorld"  and is unaffected by  the map.         */         future<integer> f2 = f1.map (new mapper<string, integer> ()  {            public Integer  Apply (String s)  {                 system.out.println (Thread.CurrentThread (). GetName ()  +  " thread end| | | F1->f2 ");     &nbSp;           return s.length ();             }        }, &NBSP;EC);         f2.oncomplete (New oncomplete<integer> ()  {             @Override              public void oncomplete (Throwable failure,  integer success)  throws Throwable {                 system.out.print (Thread.CurrentThread (). GetName ()  +  " thread end| | |");                  System.out.println ("f2 on complete="  + success);         &nBSP;&NBSP;&NBSP;&NBSP;}&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;},&NBSP;EC);         f2.onsuccess (new onsuccess<integer> ()  {              @Override              public void onsuccess (Integer result)  throws Throwable {                 system.out.print ( Thread.CurrentThread (). GetName ()  +  " thread end| | |");                  System.out.println ("The length of the returned result ="  + result);           &NBSP;&NBSP;}&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;},&NBSP;EC);         f2.onfailure (New onfailure ()  {             @Override              public void onfailure (throwable failure)  throws Throwable  {                 System.out.print (Thread.CurrentThread (). GetName ()  +  " thread end| | |");                  System.out.println ("f2 failure="  + failure.getmessage ());       &NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;}&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;},&NBSP;EC);         system.out.println (Thread.CurrentThread (). GetName ()  +    Thread end ");     }}

Run the results,

Main thread End

Pool-1-thread-1 Thread end| | | F1

Pool-1-thread-2 Thread end| | | F1->f2

Pool-1-thread-1 Thread end| | | F2 on complete=10

pool-1-thread-3 Thread end| | | Returns the length of the result =10

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Akka working with the future Functionally_map method