How to handle request errors on Store

I'm trying to show an error information in my app.

I tried 3 different cases and in all is the same situation.

404 error, JSON Reader error and nonexistent URL.

In my Store added a load listener to verify the success and the store.isLoaded().

In all cases the success returns false but store.isLoaded() returns true and I think it makes a blank page load.

I think that should show the emptyText list property since it was not loaded any content.

How to handle it?

I'm calling Store.load() in the list initialize method.

Code:

Ext.define('Amib.view.EventsList', {
    extend: 'Ext.dataview.List',
    xtype: 'eventslist',


    config: {
        cls: 'eventslist',
        disableSelection: true,
        height: '100%',
        scrollable: 'vertical',
        store: 'events',
        itemTpl: new Ext.XTemplate(
            '<div class="title">{title}</div>',
            '<div class="date">{date}</div>',
            '<div class="location">{location}</div>',
            '<tpl if="link">',
                '<div class="more">',
                    '<input type="button" class="link" id="{link}" value="More Info"/>',
                '</div>',
            '</tpl>'
        ),
        listeners: {
            initialize: function (list) {
                list.getStore().load();
            },
            itemtap: function (list, index, target, record, event) {
                if (Ext.get(event.target).hasCls('link') && !Ext.isEmpty(record.get('link'))) {
                    Amib.app.getController('Base').openURL(record.get('link'), true);
                }
            }
        }
    }
});

Code:

Ext.define('Amib.store.Events', {
    extend: 'Ext.data.Store',
    config: {
        autoLoad: false,
        model: 'Amib.model.Event',
        storeId: 'events',
        proxy: {
            type: 'ajax',
            url: 'http://ift.tt/1vSMS38',
            noCache: false,
            enablePagingParams: false,
            reader: {
                type: 'json',
                rootProperty: 'items'
            }
        }
    }
});

How to handle request errors on Store