uas-platform/frontend/uas-web/app/store/DataCenter.js

Ext.define('uas.store.DataCenter', {
    extend: 'Ext.data.Store',

    alias: 'store.datacenter',

    model: 'uas.model.DataCenter',

    autoLoad: true,
    proxy: {
        type: 'ajax',
        reader: {
            type: 'json',
            rootProperty: 'data'
        },
        url: '/resources/mock/datacenter.json'
    }
});