+ * <p>And <b>new in Ext version 3</b>, attach centralized event-listeners upon the DataProxy class itself! This is a great place\r
+ * to implement a <i>messaging system</i> to centralize your application's user-feedback and error-handling.</p>\r
+ * <pre><code>\r
+// Listen to all "beforewrite" event fired by all proxies.\r
+Ext.data.DataProxy.on('beforewrite', function(proxy, action) {\r
+ console.log('beforewrite: ', action);\r
+});\r
+\r
+// Listen to "write" event fired by all proxies\r
+Ext.data.DataProxy.on('write', function(proxy, action, data, res, rs) {\r
+ console.info('write: ', action);\r
+});\r
+\r
+// Listen to "exception" event fired by all proxies\r
+Ext.data.DataProxy.on('exception', function(proxy, type, action) {\r
+ console.error(type + action + ' exception);\r
+});\r
+ * </code></pre>\r
+ * <b>Note:</b> These three events are all fired with the signature of the corresponding <i>DataProxy instance</i> event {@link #beforewrite beforewrite}, {@link #write write} and {@link #exception exception}.\r