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/*******************************************************************************
* Copyright (c) 2011 IBM 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:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.help.internal.webapp.service;
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.eclipse.help.internal.search.SearchProgressMonitor;
import org.eclipse.help.internal.webapp.data.UrlUtil;
import org.eclipse.help.internal.webapp.utils.Utils;
/**
* Returns <code>xml</code> or <code>String</code> representing search progress monitor
*
* @param lang - (optional) specifies the locale
* @param returnType - (Optional) specifies the return type of the servlet.
* Accepts either <code>xml</code> (default) or
* <code>json</code>
*
* @return Search progress monitor state, either as <code>xml</code>
* or <code>String</code> (default)
*
* @version $Version$
*
**/
public class SearchStateService extends HttpServlet {
private static final long serialVersionUID = 1L;
private final static String STATE = "state"; //$NON-NLS-1$
private final static String PERCENT = "percent"; //$NON-NLS-1$
@Override
public void init() throws ServletException {
}
/**
* Called by the server (via the <code>service</code> method) to allow a
* Servlet to handle a GET request.
*/
@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException {
process(req,resp);
}
/**
*
* Called by the server (via the <code>service</code> method) to allow a
* Servlet to handle a POST request.
*
* Handle the search requests,
*
*/
@Override
protected void doPost(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException {
process(req, resp);
}
/**
* Processes all requests to the servlet.
*
*/
private void process(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException {
resp.setHeader("Cache-Control", "no-store, no-cache, must-revalidate"); //$NON-NLS-1$ //$NON-NLS-2$
resp.setCharacterEncoding("UTF-8"); //$NON-NLS-1$
int indexCompletion = 0;
String locale = UrlUtil.getLocale(req, resp);
SearchProgressMonitor pm = SearchProgressMonitor
.getProgressMonitor(locale);
if (pm.isDone()) {
indexCompletion = 100;
} else {
indexCompletion = pm.getPercentage();
if (indexCompletion >= 100) {
// 38573 We do not have results, so index cannot be 100
indexCompletion = 100 - 1;
}
}
String returnType = req.getParameter(Utils.RETURN_TYPE);
boolean isXML = Utils.XML.equalsIgnoreCase(returnType);
if (isXML) {
resp.setContentType("application/xml"); //$NON-NLS-1$
resp.getWriter().write(toXML(indexCompletion));
} else {
resp.setContentType("text/plain"); //$NON-NLS-1$
resp.getWriter().write(toString(indexCompletion));
}
resp.getWriter().flush();
}
public static String toXML(int percent) {
String xml = "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n"; //$NON-NLS-1$
xml += '<'+STATE+">\n"; //$NON-NLS-1$
xml += " <"+PERCENT+'>'+percent+"</"+PERCENT+">\n"; //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$
xml += "</"+STATE+">"; //$NON-NLS-1$ //$NON-NLS-2$
return xml;
}
public static String toString(int percent) {
return "Percent:" + percent; //$NON-NLS-1$
}
}
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