/*! * Ext JS Library 3.4.0 * Copyright(c) 2006-2011 Sencha Inc. * licensing@sencha.com * http://www.sencha.com/license */ /** * @class Ext.direct.Provider * @extends Ext.util.Observable *

Ext.direct.Provider is an abstract class meant to be extended.

* *

For example ExtJs implements the following subclasses:

*

Provider
|
+---{@link Ext.direct.JsonProvider JsonProvider} 
    |
    +---{@link Ext.direct.PollingProvider PollingProvider}   
    |
    +---{@link Ext.direct.RemotingProvider RemotingProvider}   
 * 
* @abstract */ Ext.direct.Provider = Ext.extend(Ext.util.Observable, { /** * @cfg {String} id * The unique id of the provider (defaults to an {@link Ext#id auto-assigned id}). * You should assign an id if you need to be able to access the provider later and you do * not have an object reference available, for example: *

Ext.Direct.addProvider(
    {
        type: 'polling',
        url:  'php/poll.php',
        id:   'poll-provider'
    }
);
     
var p = {@link Ext.Direct Ext.Direct}.{@link Ext.Direct#getProvider getProvider}('poll-provider');
p.disconnect();
     * 
*/ /** * @cfg {Number} priority * Priority of the request. Lower is higher priority, 0 means "duplex" (always on). * All Providers default to 1 except for PollingProvider which defaults to 3. */ priority: 1, /** * @cfg {String} type * Required, undefined by default. The type of provider specified * to {@link Ext.Direct Ext.Direct}.{@link Ext.Direct#addProvider addProvider} to create a * new Provider. Acceptable values by default are:
*/ // private constructor : function(config){ Ext.apply(this, config); this.addEvents( /** * @event connect * Fires when the Provider connects to the server-side * @param {Ext.direct.Provider} provider The {@link Ext.direct.Provider Provider}. */ 'connect', /** * @event disconnect * Fires when the Provider disconnects from the server-side * @param {Ext.direct.Provider} provider The {@link Ext.direct.Provider Provider}. */ 'disconnect', /** * @event data * Fires when the Provider receives data from the server-side * @param {Ext.direct.Provider} provider The {@link Ext.direct.Provider Provider}. * @param {event} e The {@link Ext.Direct#eventTypes Ext.Direct.Event type} that occurred. */ 'data', /** * @event exception * Fires when the Provider receives an exception from the server-side */ 'exception' ); Ext.direct.Provider.superclass.constructor.call(this, config); }, /** * Returns whether or not the server-side is currently connected. * Abstract method for subclasses to implement. */ isConnected: function(){ return false; }, /** * Abstract methods for subclasses to implement. */ connect: Ext.emptyFn, /** * Abstract methods for subclasses to implement. */ disconnect: Ext.emptyFn });