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/*
* JasperReports - Free Java Reporting Library.
* Copyright (C) 2001 - 2014 TIBCO Software Inc. All rights reserved.
* http://www.jaspersoft.com
*
* Unless you have purchased a commercial license agreement from Jaspersoft,
* the following license terms apply:
*
* This program is part of JasperReports.
*
* JasperReports is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* JasperReports is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with JasperReports. If not, see .
*/
package net.sf.jasperreports.web.servlets;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.HashMap;
import java.util.LinkedHashMap;
import java.util.Map;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import net.sf.jasperreports.engine.JRConstants;
import net.sf.jasperreports.engine.JRException;
import net.sf.jasperreports.engine.JRRuntimeException;
import net.sf.jasperreports.web.WebReportContext;
import net.sf.jasperreports.web.util.JacksonUtil;
import net.sf.jasperreports.web.util.WebUtil;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
/**
* @author Narcis Marcu([email protected])
*/
public class ReportPageStatusServlet extends AbstractServlet
{
private static final long serialVersionUID = JRConstants.SERIAL_VERSION_UID;
private static final Log log = LogFactory.getLog(ReportPageStatusServlet.class);
/**
*
*/
public void service(
HttpServletRequest request,
HttpServletResponse response
) throws IOException, ServletException {
response.setContentType(JSON_CONTENT_TYPE);
setNoExpire(response);
PrintWriter out = response.getWriter();
String contextId = request.getParameter(WebReportContext.REQUEST_PARAMETER_REPORT_CONTEXT_ID);
if (contextId != null && request.getHeader("accept").indexOf(JSON_ACCEPT_HEADER) >= 0) {
WebReportContext webReportContext = WebReportContext.getInstance(request, false);
if (webReportContext != null) {
try {
pageUpdate(request, response, webReportContext);
} catch (Exception e) {
log.error("Error on page status update", e);
response.setStatus(404);
out.println("{\"msg\": \"JasperReports encountered an error on page status update!\"}");
}
} else {
response.setStatus(404);
out.println("{\"msg\": \"Resource with id '" + contextId + "' not found!\"}");
return;
}
} else {
response.setStatus(400);
out.println("{\"msg\": \"Wrong parameters!\"}");
}
}
protected void pageUpdate(HttpServletRequest request, HttpServletResponse response,
WebReportContext webReportContext) throws JRException, IOException
{
JasperPrintAccessor jasperPrintAccessor = (JasperPrintAccessor) webReportContext.getParameterValue(
WebReportContext.REPORT_CONTEXT_PARAMETER_JASPER_PRINT_ACCESSOR);
if (jasperPrintAccessor == null)
{
throw new JRRuntimeException("Did not find the report on the session.");
}
String pageIdxParam = request.getParameter(WebUtil.REQUEST_PARAMETER_PAGE);
Integer pageIndex = pageIdxParam == null ? null : Integer.valueOf(pageIdxParam);
String pageTimestampParam = request.getParameter(WebUtil.REQUEST_PARAMETER_PAGE_TIMESTAMP);
Long pageTimestamp = pageTimestampParam == null ? null : Long.valueOf(pageTimestampParam);
if (log.isDebugEnabled())
{
log.debug("report page update check for pageIndex: " + pageIndex
+ ", pageTimestamp: " + pageTimestamp);
}
Map reportStatus = new LinkedHashMap();
putReportStatusResult(response, jasperPrintAccessor, reportStatus);
if (pageIndex != null && pageTimestamp != null)
{
ReportPageStatus pageStatus = jasperPrintAccessor.pageStatus(pageIndex, pageTimestamp);
boolean modified = pageStatus.hasModified();
reportStatus.put("pageModified", modified);
reportStatus.put("pageFinal", pageStatus.isPageFinal());
if (log.isDebugEnabled())
{
log.debug("page " + pageIndex + " modified " + modified);
}
}
Map result = new HashMap();
result.put("result", reportStatus);
String resultString = JacksonUtil.getInstance(getJasperReportsContext()).getJsonString(result);
PrintWriter out = response.getWriter();
out.write(resultString);
out.flush();
}
protected void putReportStatusResult(HttpServletResponse response,
JasperPrintAccessor printAccessor, Map result) throws JRException
{
ReportExecutionStatus reportStatus = printAccessor.getReportStatus();
result.put("lastPartialPageIndex", reportStatus.getCurrentPageCount() - 1);
String status;
switch (reportStatus.getStatus())
{
case FINISHED:
status = "finished";
Integer totalPageCount = reportStatus.getTotalPageCount();
result.put("lastPageIndex", totalPageCount-1);
if (log.isDebugEnabled())
{
log.debug("report finished " + totalPageCount + " pages");
}
break;
case ERROR:
status = "error";
handleReportUpdateError(response, reportStatus);
break;
case CANCELED:
status = "canceled";
if (log.isDebugEnabled())
{
log.debug("report canceled");
}
break;
case RUNNING:
default:
status = "running";
if (log.isDebugEnabled())
{
log.debug("report running");
}
break;
}
result.put("status", status);
}
protected void handleReportUpdateError(HttpServletResponse response, ReportExecutionStatus reportStatus)
throws JRException
{
Throwable error = reportStatus.getError();
if (log.isDebugEnabled())
{
log.debug("report error " + error);// only message
}
// set a header so that the UI knows it's a report execution error
response.setHeader("reportError", "true");
// set as a header because we don't have other way to pass it
response.setHeader("lastPartialPageIndex", Integer.toString(reportStatus.getCurrentPageCount() - 1));
// throw an exception to get to the error page
if (error instanceof JRException)
{
throw (JRException) error;
}
if (error instanceof JRRuntimeException)
{
throw (JRRuntimeException) error;
}
throw new JRRuntimeException("Error generating report", error);
}
}
