Unable to fetchdata using RestDataSource

[ajjain]

1) Entry Point is as follows:

		RestDataSource jDs = new RestDataSource();
		jDs.setDataFormat(DSDataFormat.XML);
		jDs.setDataURL("/VOIPA/search?action=query&product=icp&queryname=confirmcount&format=xml&count=10");
		jDs.setRecordXPath("/response/data/record");
		
		OperationBinding fetch = new OperationBinding();
        fetch.setOperationType(DSOperationType.FETCH);
        fetch.setDataProtocol(DSProtocol.POSTMESSAGE);
          
        jDs.setOperationBindings(fetch);
		DataSourceField summary = new DataSourceField("MESSAGETYPE", FieldType.TEXT);
		
		DataSourceField title = new DataSourceField("REQUESTNUMBER", FieldType.TEXT);  
		jDs.addField(summary);
		jDs.addField(title);
		
		final SearchForm form = new SearchForm();  
		form.setTop(50);  
		form.setNumCols(3);  
		TextItem query = new TextItem();  
		query.setName("count");  
		query.setTitle("Query");  
		query.setDefaultValue("10"); 

		final ListGrid myGrid1 = new ListGrid();

		myGrid1.setWidth("100%");  
		myGrid1.setHeight(100);
		myGrid1.setWrapCells(true);  
		myGrid1.setFixedRecordHeights(false);  
		myGrid1.setShowAllRecords(true);  
		myGrid1.setAlternateRecordStyles(true);  
		myGrid1.setDataSource(jDs);
		

		 ButtonItem button = new ButtonItem();  
		         button.setTitle("Search");  
		         button.setStartRow(false);  
		         button.addClickHandler(new com.smartgwt.client.widgets.form.fields.events.ClickHandler() {  
		             public void onClick(com.smartgwt.client.widgets.form.fields.events.ClickEvent event) {  
		            	 myGrid1.fetchData(form.getValuesAsCriteria());  
		             }  
		         });  
		   
		         form.setItems(query, button);  

		

		VLayout layout = new VLayout(15);  
		layout.addMember(myGrid1);  
		layout.addMember(form);  

		layout.draw();

2) Response Format: Servlet returns response in application/xml format in following format.

<response>
 <status>0</status>
 <startRow>0</startRow>
 <endRow>15</endRow>
 <totalRows>15</totalRows>
  <data>
   <record>
   <MESSAGETYPE>MultiPortResponse</MESSAGETYPE>
   <REQUESTNUMBER>6017008336100040</REQUESTNUMBER>
   </record>

   <record>
   <MESSAGETYPE>StoreStatus</MESSAGETYPE>
   <REQUESTNUMBER>6017008336100040</REQUESTNUMBER>
   </record>
 </data>
</response>

3) although this code works with smart client grid. Which is as follows:

isc.DataSource.create
	({
		dataURL:"http://impetus-861:9696/VOIPA/search?action=query&product=icp&queryname=confirmcount&format=xml",
		dataFormat: "xml",
		recordXPath:"/response/data/record",
		fields:
		{
			REQUESTNUMBER:{title:"REQUESTNUMBER", name:"REQUESTNUMBER", required:true, type:"text"},
			MESSAGETYPE:{title:"MESSAGETYPE", name:"MESSAGETYPE", required:true, type:"text"}
		},
		ID:"test"
	});


	isc.ListGrid.create
	({
		ID: "submittedOrders",
		top:10,left:20,
		width:920, height:130, 
		alternateRecordStyles:true, 
		showAllRecords:true,
		showRollOver : true,
		showHover : true,
		editEvent: "click",
		dataSource: test,
		fields:
		[
			{name:"REQUESTNUMBER", title:"REQUESTNUMBER",  canEdit:false, width: 110, align: "center",recordClick:"getOrderDetail(record)"},
			{name:"MESSAGETYPE", title:"MESSAGETYPE",  canEdit:false, width: 125 , align: "center"}
		],
		autoFetchData: true,
		canReorderFields: true,
			getCellCSSText: function (record, rowNum, colNum)
			{

				if (colNum == 0)
				{
					return "font-weight:bold; color:blue; text-decoration: underline;";
				}
				
			}

	})

[ajjain]

Sorry to interrupt you all.. But following code changes resolved my problem.
But I could not come to a conclusion for the absolute reason.

		RestDataSource jDs = new RestDataSource();
		jDs.setDataFormat(DSDataFormat.XML);
		jDs.setDataURL("/VOIPA/search?action=query&product=icp&queryname=confirmcount&format=xml&count=10");

		OperationBinding fetch = new OperationBinding();
		fetch.setOperationType(DSOperationType.FETCH);
		fetch.setDataProtocol(DSProtocol.POSTMESSAGE);

		jDs.setOperationBindings(fetch);

		DataSourceTextField reqNo = new DataSourceTextField("REQUESTNUMBER", "REQUESTNUMBER");  
		DataSourceTextField msgType = new DataSourceTextField("MESSAGETYPE", "MESSAGETYPE");  

		jDs.setFields(reqNo, msgType);

		final ListGrid orderGrid = new ListGrid();  
		orderGrid.setWidth(500);  
		orderGrid.setHeight(224);  
		orderGrid.setAlternateRecordStyles(true);  
		orderGrid.setDataSource(jDs);  
		orderGrid.setEmptyCellValue("--");


		final IButton updateButton = new IButton("load");  
		updateButton.setWidth(150);  
		updateButton.addClickHandler(new ClickHandler() {  
			public void onClick(ClickEvent event) {  
				orderGrid.fetchData();
			}  
		});  
		
		VLayout layout = new VLayout(15);  
		layout.addMember(orderGrid);  
		layout.addMember(updateButton);
		layout.draw();

[sjivan]

did you track what change caused it to work?