package org.litesoft.GWT.shared.service;

import org.litesoft.GWT.shared.rpc.*;

import com.google.gwt.core.client.*;
import com.google.gwt.user.client.*;
import com.google.gwt.user.client.rpc.*;

/**
 * Ensures that async callbacks always execute on UI thread
 */
public class AppServiceAsyncProxy implements AppServiceAsync
{
    private final AppServiceAsync mService;
    
    private AppServiceAsyncProxy(AppServiceAsync pService)
    {
        mService = pService;
    }
    
    public static AppServiceAsync create()
    {
        return GWT.create(AppService.class);
    }
    
    public static AppServiceAsync wrap(AppServiceAsync pService)
    {
        return new AppServiceAsyncProxy(pService);
    }
    
    public <T extends AppResponse<?>> void get(AppRequest<T> pRequest, final AsyncCallback<T> pCallback)
    {
        mService.get(pRequest, new AsyncCallback<T>()
        {
            public void onSuccess(final T pResult)
            {
                DeferredCommand.addCommand(new Command()
                {
                    public void execute()
                    {
                        pCallback.onSuccess(pResult);
                    }
                });
            }
            
            public void onFailure(final Throwable pCaught)
            {
                DeferredCommand.addCommand(new Command()
                {
                    public void execute()
                    {
                        pCallback.onFailure(pCaught);
                    }
                });
            }
        });
    }
}