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DeferredList.js
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DeferredList.js
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if(!dojo._hasResource["dojo.DeferredList"]){ //_hasResource checks added by build. Do not use _hasResource directly in your code.
dojo._hasResource["dojo.DeferredList"] = true;
dojo.provide("dojo.DeferredList");
dojo.declare("dojo.DeferredList", dojo.Deferred, {
constructor: function(/*Array*/ list, /*Boolean?*/ fireOnOneCallback, /*Boolean?*/ fireOnOneErrback, /*Boolean?*/ consumeErrors, /*Function?*/ canceller){
// summary:
// Provides event handling for a group of Deferred objects.
// description:
// DeferredList takes an array of existing deferreds and returns a new deferred of its own
// this new deferred will typically have its callback fired when all of the deferreds in
// the given list have fired their own deferreds. The parameters `fireOnOneCallback` and
// fireOnOneErrback, will fire before all the deferreds as appropriate
//
// list:
// The list of deferreds to be synchronizied with this DeferredList
// fireOnOneCallback:
// Will cause the DeferredLists callback to be fired as soon as any
// of the deferreds in its list have been fired instead of waiting until
// the entire list has finished
// fireonOneErrback:
// Will cause the errback to fire upon any of the deferreds errback
// canceller:
// A deferred canceller function, see dojo.Deferred
this.list = list;
this.resultList = new Array(this.list.length);
// Deferred init
this.chain = [];
this.id = this._nextId();
this.fired = -1;
this.paused = 0;
this.results = [null, null];
this.canceller = canceller;
this.silentlyCancelled = false;
if (this.list.length === 0 && !fireOnOneCallback) {
this.callback(this.resultList);
}
this.finishedCount = 0;
this.fireOnOneCallback = fireOnOneCallback;
this.fireOnOneErrback = fireOnOneErrback;
this.consumeErrors = consumeErrors;
var index = 0;
dojo.forEach(this.list, function(d, index) {
d.addCallback(this, function(r) { this._cbDeferred(index, true, r); return r; });
d.addErrback(this, function(r) { this._cbDeferred(index, false, r); return r; });
index++;
},this);
},
_cbDeferred: function (index, succeeded, result) {
// summary:
// The DeferredLists' callback handler
this.resultList[index] = [succeeded, result]; this.finishedCount += 1;
if (this.fired !== 0) {
if (succeeded && this.fireOnOneCallback) {
this.callback([index, result]);
} else if (!succeeded && this.fireOnOneErrback) {
this.errback(result);
} else if (this.finishedCount == this.list.length) {
this.callback(this.resultList);
}
}
if (!succeeded && this.consumeErrors) {
result = null;
}
return result;
},
gatherResults: function (deferredList) {
// summary:
// Gathers the results of the deferreds for packaging
// as the parameters to the Deferred Lists' callback
var d = new dojo.DeferedList(deferredList, false, true, false);
d.addCallback(function (results) {
var ret = [];
for (var i = 0; i < results.length; i++) {
ret.push(results[i][1]);
}
return ret;
});
return d;
}
});
}

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DeferredList.js (3 KB)

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