/*
* eXist Open Source Native XML Database
* Copyright (C) 2001-06 Wolfgang M. Meier
* wolfgang@exist-db.org
* http://exist.sourceforge.net
*
* 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.http.servlets;
import java.io.ByteArrayInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.Date;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.log4j.xml.DOMConfigurator;
import org.exist.util.Configuration;
import org.exist.util.ConfigurationHelper;
import org.exist.util.DatabaseConfigurationException;
import org.exist.external.org.apache.commons.io.output.ByteArrayOutputStream;
/**
* Helper servlet for initializing the log4j framework in a webcontainer.
*/
public class Log4jInit extends HttpServlet {
private String getTimestamp(){
return new Date().toString();
}
private void convertLogFile(File srcConfig, File destConfig, File logDir){
// Step 1 read config file into memory
String srcDoc = "not initialized";
try {
ByteArrayOutputStream baos = new ByteArrayOutputStream();
FileInputStream is = new FileInputStream(srcConfig);
byte[] buf = new byte[1024];
int len;
while ((len = is.read(buf)) > 0) {
baos.write(buf, 0, len);
}
is.close();
baos.close();
srcDoc = new String(baos.toByteArray());
} catch (FileNotFoundException ex) {
ex.printStackTrace();
} catch (IOException ex) {
ex.printStackTrace();
}
// Step 2 ; substitute Patterns
String destDoc = srcDoc.replaceAll("loggerdir", logDir.getAbsolutePath().replaceAll("\\\\","/"));
// Step 3 ; write back to file
try {
ByteArrayInputStream bais = new ByteArrayInputStream(destDoc.getBytes());
FileOutputStream fos =new FileOutputStream(destConfig);
byte[] buf = new byte[1024];
int len;
while ((len = bais.read(buf)) > 0) {
fos.write(buf, 0, len);
}
fos.close();
bais.close();
} catch (FileNotFoundException ex) {
ex.printStackTrace();
} catch (IOException ex) {
ex.printStackTrace();
}
}
/**
* Initialize servlet for log4j purposes in servlet container (war file).
*/
@Override
public void init() throws ServletException {
// We need to check how eXist is running. If eXist is started in a
// servlet container like Tomcat, then initialization *is* needed.
//
// If eXist is started in its own jetty server, the logging is
// already initialized. All can, must and shall be skipped then.
if(!isInWarFile()) {
System.out.println("Logging already initialized. Skipping...");
return;
}
System.out.println("============= eXist Initialization =============" );
// Get data from web.xml
String file = getInitParameter("log4j-init-file");
String logdir = getInitParameter("log4j-log-dir");
if( logdir == null ) {
// Use default location for exist logs if not specified in web.xml
logdir = "WEB-INF/logs";
}
// Get path where eXist is running
String existDir = getServletContext().getRealPath("/");
// Define location of logfiles
File logsdir = new File(existDir, logdir );
logsdir.mkdirs();
System.out.println(getTimestamp() + " - eXist logs dir="
+ logsdir.getAbsolutePath());
// Get log4j configuration file
File srcConfigFile = new File(existDir,file);
// Convert
File log4jConfigFile = new File(existDir, "WEB-INF/TMPfile.xml");
convertLogFile(srcConfigFile, log4jConfigFile, logsdir);
System.out.println(getTimestamp() + " - eXist log4j configuration="
+ log4jConfigFile.getAbsolutePath());
// Configure log4j
DOMConfigurator.configure(log4jConfigFile.getAbsolutePath());
// Setup exist
File eXistConfigFile = new File(existDir, "WEB-INF/conf.xml" );
System.out.println(getTimestamp() + " - eXist-DB configuration="
+ eXistConfigFile.getAbsolutePath());
try {
/*Configuration config = */ new Configuration(eXistConfigFile.getAbsolutePath());
} catch (DatabaseConfigurationException ex) {
ex.printStackTrace();
}
System.out.println("================================================" );
}
/**
* Check wether exist runs in Servlet container (as war file).
* @return TRUE if exist runs in servlet container.
*/
public boolean isInWarFile(){
boolean retVal =true;
if (new File(ConfigurationHelper.getExistHome(), "lib/core").isDirectory()) {
retVal=false;
}
return retVal;
}
/**
* Empty method.
*
* @param req HTTP Request object
* @param res HTTP Response object
*/
@Override
public void doGet(HttpServletRequest req, HttpServletResponse res) {
//
}
}