使用jQuery的回调，而不是RPC在SignalR枢纽

Question

我需要从不同的地方订阅同一集线器几次，例如：

function firstPlace(targetHub){ 
    targetHub.client.onSomeEvent = function(data){ 
    alert('hello from first place'); 
    }; 
} 
function secondPlace(targetHub){ 
    targetHub.client.onSomeEvent = function(data){ 
    alert('hello from second place'); 
    }; 
} 

firstPlace($.connection.clientHub); 
secondPlace($.connection.clientHub); 

我想基于回调（如jquery callbacks）拥有的功能。

function firstPlace(targetHub){ 
    targetHub.client.onSomeEvent.add(function(data){ 
    alert('hello from first place'); 
    }); 
} 
function secondPlace(targetHub){ 
    targetHub.client.onSomeEvent.add(function(data){ 
    alert('hello from second place'); 
    }); 
} 


firstPlace($.connection.clientHub); 
secondPlace($.connection.clientHub); 

我知道它可以很容易地使用一些代理对象实现，但也许有一些JavaScript的魔术，我不知道？

Answer 1

如果你不帮自己，没有其他人会=）。下面是代码，是解决我的问题：

signalR.FunctionToCallback = new function() { 
    self.MapCallback = function (sourceFunction, targetCallback) { 
     if (!sourceFunction) { 
      sourceFunction = function() { 
       sourceFunction.callbacks.fireWith(this, $.makeArray(arguments)); 
      }; 
     } 
     if (!sourceFunction.callbacks) { 
      sourceFunction.callbacks = $.Callbacks(); 
     } 
     sourceFunction.callbacks.add(targetCallback); 
     return sourceFunction; 
    }; 
}; 

用例：

function firstPlace(targetHub){ 
    targetHub.client.onSomeEvent = ko.FunctionToCallback.MapCallback(targetHub.client.onSomeEvent,function(data){ 
    alert('hello from first place'); 
    }); 
} 
function secondPlace(targetHub){ 
    targetHub.client.onSomeEvent = ko.FunctionToCallback.MapCallback(targetHub.client.onSomeEvent, function(data){ 
    alert('hello from second place'); 
    }); 
} 
firstPlace($.connection.clientHub); 
secondPlace($.connection.clientHub); 

Answer 2

你可以用我EventAggregator代理像

function firstPlace() { 
    signalR.eventAggregator.subscribe(MyApp.SomeEvent, this.onSomeEvent, this); 
} 

function secondPlace() { 
    signalR.eventAggregator.subscribe(MyApp.SomeEvent, this.onSomeEvent, this); 
} 

当然，图书馆有FEATURS，但这是其中之一

https://github.com/AndersMalmgren/SignalR.EventAggregatorProxy/wiki