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[IMP] Added utility method to better handle asynchronous calls and destruction of objects. 

Critical to help solve many bugs.

bzr revid: nicolas.vanhoren@openerp.com-20130227111619-dwhjt84tz8wpd6vp
This commit is contained in:
niv-openerp 2013-02-27 12:16:19 +01:00
parent 650ff2dd5e
commit 1b4337f8e6
1 changed files with 33 additions and 10 deletions
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43
addons/web/static/src/js/corelib.js
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@ -228,6 +228,38 @@ instance.web.ParentedMixin = {
isDestroyed : function() {
return this.__parentedDestroyed;
},
/**
Utility method to only execute asynchronous actions if the current
object has not been destroyed.
@param {Promise} promise The promise representing the asynchronous action.
@param {bool} reject Defaults to false. If true, the returned promise will be
rejected with no arguments if the current object is destroyed. If false,
the returned promise will never be resolved nor rejected.
@returns {Promise} A promise that will mirror the given promise if everything goes
fine but will either be rejected with no arguments or never resolved if the
current object is destroyed.
*/
alive: function(promise, reject) {
var def = $.Deferred();
var self = this;
promise.done(function() {
if (! self.isDestroyed()) {
if (! reject)
def.resolve.apply(def, arguments);
else
def.reject();
}
}).fail(function() {
if (! self.isDestroyed()) {
if (! reject)
def.reject.apply(def, arguments);
else
def.reject();
}
});
return def.promise();
},
/**
* Inform the object it should destroy itself, releasing any
* resource it could have reserved.
@ -495,16 +527,7 @@ instance.web.Controller = instance.web.Class.extend(instance.web.PropertiesMixin
return false;
},
rpc: function(url, data, options) {
var def = $.Deferred();
var self = this;
instance.session.rpc(url, data, options).done(function() {
if (!self.isDestroyed())
def.resolve.apply(def, arguments);
}).fail(function() {
if (!self.isDestroyed())
def.reject.apply(def, arguments);
});
return def.promise();
return this.alive(instance.session.rpc(url, data, options));
}
});