/*
* eXist Open Source Native XML Database
* Copyright (C) 2009-2011 The eXist Project
* http://exist-db.org
*
* This program 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 2
* of the License, or (at your option) any later version.
*
* This program 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 this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
* $Id$
*/
package org.exist.debuggee;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletRequest;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.exist.xquery.XPathException;
import org.exist.xquery.XQueryContext;
/**
* @author <a href="mailto:shabanovd@gmail.com">Dmitriy Shabanov</a>
*
*/
public class DebuggeeFactory {
private final static Logger LOG = LogManager.getLogger(DebuggeeFactory.class);
private static Debuggee instance = null;
public static Debuggee getInstance() {
if (instance == null) {
final String className = System.getProperty("exist.debuggee", "org.exist.debuggee.DebuggeeImpl");
try {
final Class<?> clazz = Class.forName(className);
if (!Debuggee.class.isAssignableFrom(clazz)) {
LOG.warn("Class " + className + " does not implement interface Debuggee. Using fallback.");
} else {
instance = (Debuggee) clazz.newInstance();
}
} catch (final ClassNotFoundException e) {
LOG.warn("Class not found for debuggee: " + className);
} catch (final IllegalAccessException e) {
LOG.warn("Failed to instantiate class for debuggee: " + className);
} catch (final InstantiationException e) {
LOG.warn("Failed to instantiate class for debuggee: " + className);
}
if (instance == null)
{instance = new DummyDebuggee();}
}
return instance;
}
public static void checkForDebugRequest(HttpServletRequest request, XQueryContext context) throws XPathException {
//TODO: XDEBUG_SESSION_STOP_NO_EXEC
//TODO: XDEBUG_SESSION_STOP
//if get "start new debug session" request
String xdebug = request.getParameter("XDEBUG_SESSION_START");
if (xdebug != null) {
context.declareVariable(Debuggee.SESSION, xdebug);
} else {
//if have session
xdebug = request.getParameter("XDEBUG_SESSION");
if (xdebug != null) {
context.declareVariable(Debuggee.SESSION, xdebug);
} else {
//looking for session in cookies (FF XDebug Helper add-ons as example)
final Cookie[] cookies = request.getCookies();
if (cookies != null) {
for (int i = 0; i < cookies.length; i++) {
if ("XDEBUG_SESSION".equals(cookies[i].getName())) {
//TODO: check for value?? ("eXistDB_XDebug" ? or leave "default") -shabanovd
context.declareVariable(Debuggee.SESSION, cookies[i].getValue());
break;
}
}
}
}
}
if (context.requireDebugMode()) {
final String idekey = request.getParameter("KEY");
if (idekey != null)
{context.declareVariable(Debuggee.IDEKEY, idekey);}
}
}
}