Sencha touch one store instance for multiple stores - storage

Question

So I have two stores that use the exact same model, they are exactly the same in every way (except for their names of course). I want two different stores.
app.stores.newsFeed = new Ext.data.Store({
model: 'app.models.feedData',
proxy: {
type: 'scripttag',
url: 'http://query.yahooapis.com/v1/public/yql',
extraParams: {
format: 'json'
},
reader: {
root: 'query.results.item'
}
}
});
app.stores.eventsFeed = new Ext.data.Store({
model: 'app.models.feedData',
proxy: {
type: 'scripttag',
url: 'http://query.yahooapis.com/v1/public/yql',
extraParams: {
format: 'json'
},
reader: {
root: 'query.results.item'
}
}
});
My question is can I save space by getting rid of code and use only one store instance so I don't have to re-declare another new Ext.data.Store again?
something like:
store = new Ext.data.Store(...);
app.stores.newsFeed = store;
app.stores.eventsFeed = store;
I tried this before but both were assigned to the same store so when one was changed so was the other.

Answer 1

Just extend extJS component and you can get fast instances of your component:
MyStore = Ext.extend(Ext.data.Store, {
constructor : function(config) {
config = Ext.apply({
model: 'app.models.feedData',
proxy: {
type: 'scripttag',
url: 'http://query.yahooapis.com/v1/public/yql',
extraParams: {
format: 'json'
},
reader: {
root: 'query.results.item'
}
}
}, config);
MyStore.superclass.constructor.call(this, config);
},
onDestroy : function(config) {
MyStore.superclass.onDestroy.apply(this, arguments);
}
});
And create as much independent instanses as you want:
app.stores.newsFeed = Ext.create(MyStore, {});
app.stores.eventsFeed = Ext.create(MyStore, {});