java - Building complex promises in Play -

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supposed need return promise method, depends on external resource , calculation. imagine like:

promise<integer> foo() {   return ws.url(url)     .getasync()     .callwhenready(new function<httpresponse>(){       integer parse(httpresponse response) {         // parsing business logic          // ...         int parsed = ...;         return parsed;       }   }); }

what can use callwhenready? jquery.promise() behaves.

i think want f.promise.map (play 2.0.2):

    /**      * maps promise promise of type <code>b</code>.  function <code>function</code> applied      * promise redeemed.      *      * exceptions thrown <code>function</code> wrapped in {@link java.lang.runtimeexception}, unless      * <code>runtimeexception</code>'s themselves.      *      * @param function function map <code>a</code> <code>b</code>.      * @return wrapped promise maps type <code>a</code> <code>b</code>.      */     public <b> promise<b> map(final function<a, b> function) {         return new promise<b>(             promise.map(new scala.runtime.abstractfunction1<a,b>() {                 public b apply(a a) {                     try {                         return function.apply(a);                     } catch (runtimeexception e) {                         throw e;                     } catch(throwable t) {                         throw new runtimeexception(t);                     }                 }             })         );     }

it seems code you're using earlier version play, think should still able replace callwhenready map (and add integer type parameter callback function).


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