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**rileyriley** · 26 Aug 2010, 13:25

I've tried again with the Showcase sample, with the same results. Do I need javac in the war directory or something?

**alius** · 26 Aug 2010, 13:41

Hi,

Just added your code to sample and it worked. Here is a complete GAEDSEntryPoint.java:

Code:

package com.smartgwt.sample.client;

import com.google.gwt.core.client.EntryPoint;
import com.smartgwt.client.core.KeyIdentifier;
import com.smartgwt.client.data.DataSource;
import com.smartgwt.client.rpc.RPCCallback;
import com.smartgwt.client.rpc.RPCManager;
import com.smartgwt.client.rpc.RPCRequest;
import com.smartgwt.client.rpc.RPCResponse;
import com.smartgwt.client.types.ListGridEditEvent;
import com.smartgwt.client.util.KeyCallback;
import com.smartgwt.client.util.Page;
import com.smartgwt.client.util.SC;
import com.smartgwt.client.widgets.IButton;
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.grid.ListGridField;
import com.smartgwt.client.widgets.grid.ListGridRecord;
import com.smartgwt.client.widgets.grid.events.EditorEnterEvent;
import com.smartgwt.client.widgets.grid.events.EditorEnterHandler;
import com.smartgwt.client.widgets.grid.events.SelectionChangedHandler;
import com.smartgwt.client.widgets.grid.events.SelectionEvent;
import com.smartgwt.client.widgets.layout.VStack;

public class GAEDSEntryPoint implements EntryPoint {

    /**
     * Creates a new instance of GAEDSEntryPoint
     */
    public GAEDSEntryPoint() {
    }

    /**
     * The entry point method, called automatically by loading a module
     * that declares an implementing class as an entry-point
     */
    public void onModuleLoad() {
		KeyIdentifier debugKey = new KeyIdentifier();
		debugKey.setCtrlKey(true);
		debugKey.setKeyName("D");

		Page.registerKey(debugKey, new KeyCallback() {
			public void execute(String keyName) {
				SC.showConsole();
			}
		});

        VStack vStack = new VStack();
        vStack.setLeft(175);
        vStack.setTop(75);
        vStack.setWidth("70%");
        vStack.setMembersMargin(20);

        final DataSource countryDS = DataSource.get("country_DataSource");

        final ListGrid countryGrid = new ListGrid();
        countryGrid.setWidth(700);
        countryGrid.setHeight(224);
        countryGrid.setAlternateRecordStyles(true);
        countryGrid.setDataSource(countryDS);
        countryGrid.setAutoFetchData(true);
        countryGrid.setShowFilterEditor(true);
        countryGrid.setCanEdit(true);
        countryGrid.setEditEvent(ListGridEditEvent.CLICK);
        countryGrid.setCanRemoveRecords(true);

        ListGridField countryCode = new ListGridField("countryCode", "Code", 50);
        ListGridField countryName = new ListGridField("countryName", "Country");

        countryGrid.setFields(countryCode, countryName);

        IButton newCountryButton = new IButton("New country");
        newCountryButton.addClickHandler(new ClickHandler()
        {
            public void onClick (ClickEvent event)
            {
                countryGrid.startEditingNew();
            }
        });

        DataSource cityDS = DataSource.get("city_DataSource");
        final ListGrid cityGrid = new ListGrid();
        cityGrid.setWidth(700);
        cityGrid.setHeight(224);
        cityGrid.setAlternateRecordStyles(true);
        cityGrid.setDataSource(cityDS);
        cityGrid.setAutoFetchData(false);
        cityGrid.setShowFilterEditor(true);
        cityGrid.setCanEdit(true);
        cityGrid.setEditEvent(ListGridEditEvent.CLICK);
        cityGrid.setCanRemoveRecords(true);

        ListGridField cityName = new ListGridField("cityName", "City");

        cityGrid.setFields(cityName);

        IButton newCityButton = new IButton("New city");
        newCityButton.addClickHandler(new ClickHandler()
        {
            public void onClick (ClickEvent event)
            {
                ListGridRecord record = countryGrid.getSelectedRecord();
                if (record != null) {
                    cityGrid.startEditingNew();
                }
                else {
                    SC.warn("Select country first.");
                }
            }
        });

        countryGrid.addSelectionChangedHandler(new SelectionChangedHandler()
        {
            public void onSelectionChanged (SelectionEvent event)
            {
                if (event.getState()) {
                    ListGridRecord record = countryGrid.getSelectedRecord();
                    if (record != null) {
                        cityGrid.fetchRelatedData(record, countryDS);
                    }
                }
            }
        });

        cityGrid.addEditorEnterHandler(new EditorEnterHandler()
        {
            public void onEditorEnter (EditorEnterEvent event)
            {
                cityGrid.setEditValue(event.getRowNum(), "countryId",
                                      countryGrid.getSelectedRecord().getAttribute("countryId"));
            }
        });

        IButton fillDataButton = new IButton("Add some data");
        fillDataButton.addClickHandler(new ClickHandler() {
            public void onClick (ClickEvent event)
            {
                RPCRequest req = new RPCRequest();
                req.setActionURL("/fillData");
                RPCManager.sendRequest(req, new RPCCallback() {
                    public void execute (RPCResponse response, Object rawData,
                                         RPCRequest request)
                    {
                        countryGrid.fetchData();
                    }
                });
            }
        });

        IButton vbButton = new IButton("VisualBuilder");
        vbButton.addClickHandler(new ClickHandler() {
            public void onClick(ClickEvent event) {
                com.smartgwtee.tools.client.SCEE.openVisualBuilder();
            }
        });
        vbButton.draw();

        vStack.addMember(newCountryButton);
        vStack.addMember(countryGrid);
        vStack.addMember(newCityButton);
        vStack.addMember(cityGrid);
        vStack.addMember(fillDataButton);

        vStack.draw();

        countryGrid.getResultSet().setUseClientFiltering(Boolean.FALSE);
        countryGrid.getResultSet().setUseClientSorting(Boolean.FALSE);
    }
}

Addidtionlly - I had to add to GAEDS.gwt.xml:

Code:

<inherits name="com.smartgwtee.tools.Tools"/>

Rebuilt project and it worked.

Your exception shows that your GAE engine can not find javac.exe.
GAE found javac.exe when you run example without changes... and can not find it after you changed onModuleLoad() - sounds really strange. Did you change anything else?

Regards,
Alius

**rileyriley** · 26 Aug 2010, 13:50

I also added <inherits name="com.smartgwtee.tools.Tools"/> to the gwt.xml file; sorry if I forgot to mention that.

To be clear, there was no evidence that the web app could find javac before I made the changes. The sample compiled and ran both before and after I added the visualBuilder launch code.

Additionally, when I ran the showcase example (which already has the visualBuilder launch code in it), I got the same error.

So, I think the appengine _compiler_ has no problem finding javac, but once the app is _running_ javac is no longer in any path or working directory. The JDK is installed and working merrily for Java projects, etc.

I get the feeling that I need to add my JDK/bin directory to something like a class path or a working directory. I tried adding it to the classpath, and that didn't work. I assume the working directory needs to remain at its current war/.

Thanks for the ideas, and for spending time recreating this - it's curious that it works for you. I guess I must have something misconfigured. More ideas about what could be misconfigured are welcome! :)

Thanks again,

Riley

**alius** · 26 Aug 2010, 14:02

Looks like you have some configuration issues on your PC.

Do you have defined env variables?:
JAVA_HOME
APPENGINE_HOME
PATH

Could you post their values?

Alius

**rileyriley** · 26 Aug 2010, 14:07

Ah hah!

Thanks for the inspiration. I did not have JAVA_HOME defined in my environment variables. I defined it, and everything seems to be working now.

Thanks a lot - I feel a bit sheepish ;)

Riley

**philbair** · 11 May 2011, 12:41

When a software provider creates a tool like this, why would they make it necessary to write a program to run it? This makes no sense to me whatsoever. That's like having a browser but the only way to use the browser is to write a program that executes it and then have to run your own launching program every time you want to use it. Really???

**Isomorphic** · 11 May 2011, 12:56

Hi Phil,

This way of doing things comes from the expected development cycle of GWT. Our sister product SmartClient works as you seem to expect because GWT is not involved. First take a look at the FAQ to understand what this tool is for when using GWT.

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Launching visualBuilder: cannot find javac.exe

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