Can't ListGrid.FetchData() again without modification except Criteria DROPONCHANGE

[immobilia]

Can't ListGrid.FetchData() again without modification except Criteria DROPONCHANGE

I uncessyfull try to fetchData() one more time without modification on the ListGrid.

The internal cache isn't modified and call fetchData() once again, don't call Fetch to server.

I try to change the default CriteriaPolicy from DROPONSHORTENING to DROPONCHANGE, but no more effect.

com.smartgwt.client.types.CriteriaPolicy.DROPONCHANGE
Cache is dropped whenever criteria changes.

public class ModuleAccueil implements EntryPoint {

    ListGridField listGridFieldId = new ListGridField("id","Id");
		listGridFieldId.setWidth("50px");
		listGridFieldId.setHidden(true);
		
		ListGridField listGridFieldCentral = new ListGridField("zone","Zone");
		listGridFieldCentral.setWidth("30px");
		
		final ListGrid listGrid = new ListGrid();
		
		listGrid.setHeaderSpans(
				new HeaderSpan("MyGrid", new String[]{"id", "zone"}));		
		listGrid.setHeaderHeight(40);
		listGrid.setWidth(200);
		listGrid.setHeight(224);			
		listGrid.setCanHover(true);

		listGrid.setCanAcceptDrop(true);
		listGrid.setCanAcceptDroppedRecords(true);

		listGrid.setCanDrag(true);
		listGrid.setCanDragRecordsOut(true);
		listGrid.setCanDrop(true);
		listGrid.setDragType("dndOtStock");
		listGrid.setDropTypes("dndOtErreur","dndOtAffecte","dndOtStock");
		
		listGrid.setDragDataAction(DragDataAction.MOVE);		
		
		final RestDataSource dataSource = new RestDataSource();
		dataSource.setDataFormat(DSDataFormat.XML); 
		
		dataSource.setCriteriaPolicy(CriteriaPolicy.DROPONCHANGE);
//		dataSource.setCriteriaPolicy(CriteriaPolicy.DROPONSHORTENING);
		
		Map<String,String> defParams = new HashMap<String, String>();
		defParams.put("mode", "myMode");
		
		dataSource.setDefaultParams(defParams);
        OperationBinding fetch = new OperationBinding();
        fetch.setOperationType(DSOperationType.FETCH);
        fetch.setDataProtocol(DSProtocol.POSTMESSAGE);
          
        dataSource.setOperationBindings(fetch);

        dataSource.setFetchDataURL(GWT.getModuleBaseURL()+"datasource");
		
		DataSourceIntegerField idDs = new DataSourceIntegerField("id","Id");
		idDs.setPrimaryKey(true);
		DataSourceTextField centralDs = new DataSourceTextField("zone","Zone");
		
		dataSource.setFields(idDs,centralDs);

		dataSource.setCriteriaPolicy(CriteriaPolicy.DROPONCHANGE);
		dataSource.setCriteriaPolicy(CriteriaPolicy.DROPONSHORTENING);
		
		listGrid.setSortField(1);
		listGrid.setSortDirection(SortDirection.ASCENDING);
		
		listGrid.setDataSource(dataSource);
		listGrid.setAutoFetchData(true);
		
		Button button = new Button("Reload DataSource");
		button.addClickHandler(new ClickHandler() {

//			@Override
			public void onClick(ClickEvent event) {
				System.out.println("onClick");
				
				Criteria criteria = new Criteria();
				criteria.addCriteria("criteriaField", "criteriaValue");
				listGrid.fetchData(criteria);

								
			}
			
		});
		
		
		VStack vsStack = new VStack();
		vsStack.setMembers(listGrid,button);
				
		RootPanel.get().add(vsStack);

Servlet :

	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		System.out.println("doPost");
		
		StringBuilder sb = new StringBuilder();
sb.append("<?xml version=\"1.0\" encoding=\"UTF-8\"?>");
sb.append("<response>");
sb.append("	<status>0</status>");
sb.append("	<startRow>0</startRow>");
sb.append("	<endRow>5</endRow>");
sb.append("	<totalRows>5</totalRows>");
sb.append("	<data>");
sb.append("		<record><empty/><id>999999</id><zone>987</zone><fieldNotDisplay>NotSee</fieldNotDisplay></record>");
sb.append("		<record><empty/><id>710509</id><zone>KA1</zone><fieldNotDisplay>NotSee</fieldNotDisplay></record>");
sb.append("		<record><empty/><id>710510</id><zone>KA2</zone><fieldNotDisplay>NotSee</fieldNotDisplay></record>");
sb.append("		<record><empty/><id>710511</id><zone>KA3</zone><fieldNotDisplay>NotSee</fieldNotDisplay></record>");
sb.append("		<record><empty/><id>123456</id><zone>012</zone><fieldNotDisplay>NotSee</fieldNotDisplay></record>");
sb.append("	</data>");
sb.append("</response>");

	response.getWriter().write(sb.toString()); 
		
	}

I think, the CriteriaPolicy.DROPONCHANGE doesn't work, on y don't know how to use.
So, why not add a new method or agument to force a new fetch on same DataSource unchanged ?

[Isomorphic]

dropOnChange means a change in criteria. The cache will not be dropped if there if setCriteria() is called again but with identical criteria. To force the cache to be dropped, called invalidateCache().

[mrquejo]

Immobilia, are you using the SmartClient Server on your app?
Im asking that, because im trying to make an app like yours (RestDataSource fetching data from a servlet) but when the RestDataSource calls the fetch operation, i got:

" Uncaught JavaScript exception [uncaught exception: Permission denied to call method XMLHttpRequest.open] in, line 0 "

Is there a chance for you to post, or send to me your entire app for consulting ?

Tks for any help

[Isomorphic]

@mrquejo, your problem is unrelated, you need to use relative URLs for the fetch/add/etc URLs on your RestDataSource. Web pages cannot send requests to servers other than the server they came from, except for special exceptions such as JSONP (see XJSONDataSource).

[mrquejo]

you need to use relative URLs for the fetch/add/etc URLs on your RestDataSource

.

Hi Isomorphic, tks for the tip, i tryed and it worked :D
Now i got my so dreamed server integration...
Tks again.

[ajjain]

sb.append("<?xml version=\"1.0\" encoding=\"UTF-8\"?>");
sb.append("<response>");
sb.append("	<status>0</status>");
sb.append("	<startRow>0</startRow>");
sb.append("	<endRow>5</endRow>");
sb.append("	<totalRows>5</totalRows>");
sb.append("	<data>");
sb.append("		<record><empty/><id>999999</id><zone>987</zone><fieldNotDisplay>NotSee</fieldNotDisplay></record>");
sb.append("		<record><empty/><id>710509</id><zone>KA1</zone><fieldNotDisplay>NotSee</fieldNotDisplay></record>");
sb.append("		<record><empty/><id>710510</id><zone>KA2</zone><fieldNotDisplay>NotSee</fieldNotDisplay></record>");
sb.append("		<record><empty/><id>710511</id><zone>KA3</zone><fieldNotDisplay>NotSee</fieldNotDisplay></record>");
sb.append("		<record><empty/><id>123456</id><zone>012</zone><fieldNotDisplay>NotSee</fieldNotDisplay></record>");
sb.append("	</data>");
sb.append("</response>");

is it a mandatory to return the records in above format. I am returning result in some other format like
<RESULTS>
<RESULT>
.. details..
</RESULT>
</RESULT>

I found the above format works fine with smart client but it doesnt with SmartGWT. I am using the XJSONDataSource...

[sjivan]

ajjain,
Please post your SmartClient sample code that you say works. The same will work in SmartGWT as well. XJSONDataSource requires data to be returned in a specific JSON format. The use in this thread is using RestDataSource which support XML as the dataformat.

Create a new thread since your post is not directly related to this thread.

Sanjiv

[ajjain]

mrquejo,
Please let me know how have you resolved the issue. I have updated a similar issue at the following link:
http://forums.smartclient.com/showth...urce+fetchData

Thanks,
+Abhishek

[mrquejo]

mrquejo,
Please let me know how have you resolved the issue. I have updated a similar issue at the following link:
http://forums.smartclient.com/showth...urce+fetchData

Thanks,
+Abhishek

Hi ajjain.
Im at work now, but when i arrive at my home ill post the code.

regards