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**mv200580** · 18 Jan 2012, 10:29

Sample project here (5 mb)
http://aws-test.dyndns.org/rds-test.zip
with jdom jar
http://aws-test.dyndns.org/jdom-1.1.2.jar

If update 1 record and click 'save', then it's ok. But if update 2 records, then error occurs.

If change rds_test.gwt.xml
from
<inherits name="com.smartgwt.SmartGwt"/>
to
<inherits name="com.smartgwtee.SmartGwtEE"/>

no error occurs, even when updating 2 records

**Isomorphic** · 18 Jan 2012, 17:25

What exact version are you using (see FAQ for how to get it)? If it's not the latest patched version (see smartclient.com/builds) please re-try with the latest patched version.

**mv200580** · 18 Jan 2012, 19:30

SmartGWT 3.0
SmartClient Version: SC_SNAPSHOT-2011-12-05/LGPL Development Only (built 2011-12-05)
GWT 2.4.0
Eclipse 3.6
browser Firefox 8.0.1, Chrome 16
Windows 7 x64 Enterprise Service Pack 1

Tried to use version
3.0p http://www.smartclient.com/builds/SmartGWT/3.0p/LGPL/2012-01-18
and
3.1d http://www.smartclient.com/builds/SmartGWT/3.1d/LGPL/2012-01-18
, but it appears the same error.

The same behavior demonstrated in the compiled form.

**Isomorphic** · 18 Jan 2012, 19:35

OK thanks. To eliminate any problems coming from your subclasses, can you please put together a minimal test case - this means just one .java file containing onModuleLoad() and, in this case, using dataURL to point to an XML response, not your complete project.

**mv200580** · 18 Jan 2012, 20:59

Rds_test.java

Code:

package com.mstar.client;

import com.google.gwt.core.client.EntryPoint;
import com.smartgwt.client.widgets.Button;
import com.smartgwt.client.widgets.events.ClickEvent;
import com.smartgwt.client.widgets.events.ClickHandler;
import com.smartgwt.client.widgets.grid.ListGrid;
import com.smartgwt.client.widgets.layout.VLayout;

/**
 * Entry point classes define <code>onModuleLoad()</code>.
 */
public class Rds_test implements EntryPoint {
	CommonDataSource ds = new CommonDataSource();
	
	public void onModuleLoad() {
		VLayout panel = new VLayout();
		panel.setSize("100%", "100%");
		
		final ListGrid grid = new ListGrid();
		grid.setUseAllDataSourceFields(true);
		grid.setAutoSaveEdits(false);
		grid.setCanEdit(true);
		grid.setDataSource(ds);
		grid.fetchData();
		
		panel.addMember(grid);
		
		Button b0 = new Button("refresh");
		b0.addClickHandler(new ClickHandler() {
			public void onClick(ClickEvent event) {
				grid.setDataSource(ds);
				grid.fetchData();
			}
		});
		panel.addMember(b0);

		Button b2 = new Button("save");
		b2.addClickHandler(new ClickHandler() {
			public void onClick(ClickEvent event) {
				grid.saveAllEdits();
			}
		});
		panel.addMember(b2);
		
		panel.draw();
	}
}

**mv200580** · 18 Jan 2012, 21:01

And CommonDataSource.java extends RestDataSource

Code:

package com.mstar.client;

import com.smartgwt.client.data.DataSourceField;
import com.smartgwt.client.data.OperationBinding;
import com.smartgwt.client.data.RestDataSource;
import com.smartgwt.client.types.DSOperationType;
import com.smartgwt.client.types.DSProtocol;
import com.smartgwt.client.types.FieldType;

public class CommonDataSource extends RestDataSource {
	public CommonDataSource() {
		setID("test");  
		setDataURL("CommonDataSourceServlet");
		
		// set operations DSProtocol to POSTXML
		OperationBinding op_fetch = new OperationBinding();
		op_fetch.setOperationType(DSOperationType.FETCH);
		op_fetch.setDataProtocol(DSProtocol.POSTMESSAGE);
		OperationBinding op_add = new OperationBinding();
		op_add.setOperationType(DSOperationType.ADD);
		op_add.setDataProtocol(DSProtocol.POSTMESSAGE);
		OperationBinding op_update = new OperationBinding();
		op_update.setOperationType(DSOperationType.UPDATE);
		op_update.setDataProtocol(DSProtocol.POSTMESSAGE);
		OperationBinding op_remove = new OperationBinding();
		op_remove.setOperationType(DSOperationType.REMOVE);
		op_remove.setDataProtocol(DSProtocol.POSTMESSAGE);
		setOperationBindings(new OperationBinding[] {op_fetch, op_add, op_update, op_remove});
		
		DataSourceField f1 = new DataSourceField("pk", FieldType.INTEGER, "Primary key");
		f1.setPrimaryKey(true);
		f1.setCanEdit(false);
		DataSourceField f2 = new DataSourceField("field", FieldType.TEXT, "Field");
		this.setFields(f1, f2);
		
	}

}

**mv200580** · 18 Jan 2012, 21:04

CommonDataSourceServlet.java, returns the same number of responses as there were requests (for 'update' operation)

Code:

package com.mstar.server;

import java.util.Iterator;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.jdom.Document;
import org.jdom.Element;
import org.jdom.JDOMException;
import org.jdom.filter.Filter;
import org.jdom.input.SAXBuilder;
import org.jdom.output.Format;
import org.jdom.output.XMLOutputter;

public class CommonDataSourceServlet extends HttpServlet {

	protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, java.io.IOException {
		SAXBuilder builder = new SAXBuilder();
		Document document = null;
		try {
			document = (Document) builder.build(req.getInputStream());
		} catch (JDOMException e) {
			e.printStackTrace();
		}
		
		Iterator requests = document.getDescendants(new Filter() {  
			public boolean matches(Object arg0) {
				if (arg0 instanceof Element && ((Element) arg0).getName().equals("request")) {   
					return true;
				}
				else
					return false;
			}
		});
		
		Element responses = new Document(new Element("responses")).getRootElement();
		while (requests.hasNext()) {
			Element request = (Element) requests.next();
			String operationType = request.getChildText("operationType");
			String dataSource = request.getChildText("dataSource");
			
			try {
				// 
				// fetch
				//
				if (operationType.equals("fetch")) {
					Element data = new Element("data");
					data.addContent(new Element("record")
							.addContent(new Element("pk").setText("1"))
							.addContent(new Element("field").setText("111")));
					data.addContent(new Element("record")
							.addContent(new Element("pk").setText("2"))
							.addContent(new Element("field").setText("111111")));
					Element response = new Element("response").setContent(data);
					responses.addContent(response);
				}
	
				// 
				// add
				//
				if (operationType.equals("add")) {
				}
	
				// 
				// update
				//
				if (operationType.equals("update")) {
					Element data = new Element("data");
					
					data.addContent(new Element("record")
							.addContent(new Element("pk").setText(request.getChild("data").getChildText("pk")))
							.addContent(new Element("field").setText(request.getChild("data").getChildText("field"))));
					Element response = new Element("response").setContent(data).addContent(new Element("status").setText("0"));
					responses.addContent(response);
				}
	
				// 
				// remove
				//
				if (operationType.equals("remove")) {
				}
			}
			catch (Exception e) {
				e.printStackTrace();
			}
		}
		
		XMLOutputter outputter = new XMLOutputter(Format.getRawFormat());
		if (responses.getChildren().size() == 1) {
			outputter.output(responses.getChild("response"), resp.getOutputStream());
		}
		else
			outputter.output(responses, resp.getOutputStream());
				
		
		
		
	}

}

**mv200580** · 22 Jan 2012, 07:11

Here is minimal test case - java file with onModuleLoad , using setFetchDataURL and setUpdateDataURL. And sample xml files for this urls.
Change values in Field for two records, click 'save' and see the error in console.

Attached Files

**mv200580** · 25 Jan 2012, 00:07

Is there a way to avoid such errors in the LGPL version, or the only way - to use Pro edition ??

**Isomorphic** · 25 Jan 2012, 02:19

Thanks for the clear test case. This problem is now corrected, but the fix is unlikely to make it into today's LGPL builds. Look for it in tomorrow's 3.0p and 3.1d builds.

**renzland** · 14 Aug 2012, 03:01

Thanks

Hi Isomorphic,
this was exactly my problem too. After downloading the newest nightly build it works :-)
Thanks for great support

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Problem with RestDataSource xml responses processing

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