Amp\Observable::subscribe PHP Method

Observable Interface Documentation Usage Examples Of Amp\Observable::subscribe Show file Open project: amphp/amp

subscribe() public method

Exceptions thrown from $onNext (or failures of promises returned from $onNext) will fail the returned Subscriber with the thrown exception.
public subscribe ( callable $onNext )
$onNext callable Function invoked each time a value is emitted from the observable. 
    public function subscribe(callable $onNext);

Usage Example

Example #1
0
 /**
  * @param \Amp\Observable $observable
  */
 public function __construct(Observable $observable)
 {
     $this->observable = $observable;
     $deferred =& $this->deferred;
     $values =& $this->values;
     $deferreds =& $this->deferreds;
     $resolved =& $this->resolved;
     $this->observable->subscribe(static function ($value) use(&$deferred, &$values, &$deferreds, &$resolved) {
         $values[] = $value;
         $deferreds[] = $pressure = new Deferred();
         if ($deferred !== null) {
             $temp = $deferred;
             $deferred = null;
             $temp->resolve(true);
         }
         if ($resolved) {
             return null;
         }
         return $pressure->promise();
     });
     $result =& $this->result;
     $error =& $this->exception;
     $this->observable->when(static function ($exception, $value) use(&$deferred, &$result, &$error, &$resolved) {
         $resolved = true;
         if ($exception) {
             $result = null;
             $error = $exception;
             if ($deferred !== null) {
                 $deferred->fail($exception);
             }
             return;
         }
         $result = $value;
         if ($deferred !== null) {
             $deferred->resolve(false);
         }
     });
 }
Observable
subscribe