Bug 173836 NPE was thrown when click "Preview " button quickly twice[00]
NPE was thrown when click "Preview " button quickly twice[00] Build number: 2.2.0.v20070212-0630 Steps to reproduce: 1.open attached report 2.click "Preview" button quickly twice Expected result: Report can be previewed properly Actual result: NPE was thrown in second preview Error log: see screen shot
viewer/org.eclipse.birt.report.viewer/birt/WEB-INF/classes/org/eclipse/birt/report/service/actionhandler/BirtGetPageActionHandler.java
/*************************************************************************************
 * Copyright (c) 2004 Actuate Corporation and others.
 * All rights reserved. This program and the accompanying materials 
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 * 
 * Contributors:
 *     Actuate Corporation - Initial implementation.
 ************************************************************************************/
package org.eclipse.birt.report.service.actionhandler;
import java.io.File;
import java.rmi.RemoteException;
import org.apache.axis.AxisFault;
import org.eclipse.birt.report.context.IContext;
import org.eclipse.birt.report.context.ViewerAttributeBean;
import org.eclipse.birt.report.resource.BirtResources;
import org.eclipse.birt.report.resource.ResourceConstants;
import org.eclipse.birt.report.service.BirtReportServiceFactory;
import org.eclipse.birt.report.service.api.IViewerReportService;
import org.eclipse.birt.report.soapengine.api.GetUpdatedObjectsResponse;
import org.eclipse.birt.report.soapengine.api.Operation;
public class BirtGetPageActionHandler extends AbstractGetPageActionHandler
{
	/**