AngularJs/ .provider / how to get the rootScope to make a broadcast?

问题

Now my task is to rewrite $exceptionHandler provider so that it will output modal dialog with message and stop default event.

What I do:

in project init I use method .provider:

.provider('$exceptionHandler', function(){

//and here I would like to have rootScope to make event broadcast

})

standart inject method does not work.

UPD: sandbox - http://jsfiddle.net/STEVER/PYpdM/

回答1:

You can inject the injector and lookup the $rootScope.

Demo plunkr: http://plnkr.co/edit/0hpTkXx5WkvKN3Wn5EmY?p=preview

myApp.factory('$exceptionHandler',function($injector){
    return function(exception, cause){
        var rScope = $injector.get('$rootScope');
        if(rScope){
            rScope.$broadcast('exception',exception, cause);
        }
    };
})

Update: add .provider technique too:

app.provider('$exceptionHandler', function() {
  // In the provider function, you cannot inject any
  // service or factory. This can only be done at the
  // "$get" method.

  this.$get = function($injector) {
    return function(exception,cause){
      var rScope = $injector.get('$rootScope');
      rScope.$broadcast('exception',exception, cause);  
    }
  };
});

回答2:

My way of doing this - using a decorator and reverting to the previous exception handler on unknown errors:

app.config(function ($provide) {
  $provide.decorator('$exceptionHandler', function($delegate, $injector) {
    return function (exception, cause) {
      if (ICanHandleThisError) {
        var rootScope= $injector.get('$rootScope');
        // do something (can use rootScope)
      } else
       $delegate(exception, cause);
    };
  });
});

回答3:

You need to inject the $rootScope:

.provider('$exceptionHandler', '$rootScope', function(){

//and here I would like to have rootScope to make event broadcast

})

Is this what you tried? And if so do you have an error message or a jsfillde/plnkr to see why it failed?

来源：https://stackoverflow.com/questions/14954811/angularjs-provider-how-to-get-the-rootscope-to-make-a-broadcast

标签

javascript

angularjs

broadcast

provider