//<feature logger> Ext.define('Ext.log.formatter.Default', { extend: 'Ext.log.formatter.Formatter', config: { messageFormat: "[{priorityName}][{callerDisplayName}] {message}" }, format: function(event) { var event = Ext.merge({}, event, { priorityName: event.priorityName.toUpperCase() }); return this.callParent([event]); } }); //</feature>