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The core jetty server artifact.
//
// ========================================================================
// Copyright (c) 1995-2017 Mort Bay Consulting Pty. Ltd.
// ------------------------------------------------------------------------
// All rights reserved. This program and the accompanying materials
// are made available under the terms of the Eclipse Public License v1.0
// and Apache License v2.0 which accompanies this distribution.
//
// The Eclipse Public License is available at
// http://www.eclipse.org/legal/epl-v10.html
//
// The Apache License v2.0 is available at
// http://www.opensource.org/licenses/apache2.0.php
//
// You may elect to redistribute this code under either of these licenses.
// ========================================================================
//
package org.eclipse.jetty.server;
import java.io.IOException;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.Writer;
import java.util.TimeZone;
import org.eclipse.jetty.util.RolloverFileOutputStream;
import org.eclipse.jetty.util.StringUtil;
import org.eclipse.jetty.util.annotation.ManagedAttribute;
import org.eclipse.jetty.util.annotation.ManagedObject;
/**
* This {@link RequestLog} implementation outputs logs in the pseudo-standard
* NCSA common log format. Configuration options allow a choice between the
* standard Common Log Format (as used in the 3 log format) and the Combined Log
* Format (single log format). This log format can be output by most web
* servers, and almost all web log analysis software can understand these
* formats.
*/
@ManagedObject("NCSA standard format request log")
public class NCSARequestLog extends AbstractNCSARequestLog
{
private String _filename;
private boolean _append;
private int _retainDays;
private boolean _closeOut;
private String _filenameDateFormat = null;
private transient OutputStream _out;
private transient OutputStream _fileOut;
private transient Writer _writer;
/* ------------------------------------------------------------ */
/**
* Create request log object with default settings.
*/
public NCSARequestLog()
{
setExtended(true);
_append = true;
_retainDays = 31;
}
/* ------------------------------------------------------------ */
/**
* Create request log object with specified output file name.
*
* @param filename the file name for the request log.
* This may be in the format expected
* by {@link RolloverFileOutputStream}
*/
public NCSARequestLog(String filename)
{
setExtended(true);
_append = true;
_retainDays = 31;
setFilename(filename);
}
/* ------------------------------------------------------------ */
/**
* Set the output file name of the request log.
* The file name may be in the format expected by
* {@link RolloverFileOutputStream}.
*
* @param filename file name of the request log
*
*/
public void setFilename(String filename)
{
if (filename != null)
{
filename = filename.trim();
if (filename.length() == 0)
filename = null;
}
_filename = filename;
}
/* ------------------------------------------------------------ */
/**
* Retrieve the output file name of the request log.
*
* @return file name of the request log
*/
@ManagedAttribute("file of log")
public String getFilename()
{
return _filename;
}
/* ------------------------------------------------------------ */
/**
* Retrieve the file name of the request log with the expanded
* date wildcard if the output is written to the disk using
* {@link RolloverFileOutputStream}.
*
* @return file name of the request log, or null if not applicable
*/
public String getDatedFilename()
{
if (_fileOut instanceof RolloverFileOutputStream)
return ((RolloverFileOutputStream)_fileOut).getDatedFilename();
return null;
}
/* ------------------------------------------------------------ */
@Override
protected boolean isEnabled()
{
return (_fileOut != null);
}
/* ------------------------------------------------------------ */
/**
* Set the number of days before rotated log files are deleted.
*
* @param retainDays number of days to keep a log file
*/
public void setRetainDays(int retainDays)
{
_retainDays = retainDays;
}
/* ------------------------------------------------------------ */
/**
* Retrieve the number of days before rotated log files are deleted.
*
* @return number of days to keep a log file
*/
@ManagedAttribute("number of days that log files are kept")
public int getRetainDays()
{
return _retainDays;
}
/* ------------------------------------------------------------ */
/**
* Set append to log flag.
*
* @param append true - request log file will be appended after restart,
* false - request log file will be overwritten after restart
*/
public void setAppend(boolean append)
{
_append = append;
}
/* ------------------------------------------------------------ */
/**
* Retrieve append to log flag.
*
* @return value of the flag
*/
@ManagedAttribute("existing log files are appends to the new one")
public boolean isAppend()
{
return _append;
}
/* ------------------------------------------------------------ */
/**
* Set the log file name date format.
* @see RolloverFileOutputStream#RolloverFileOutputStream(String, boolean, int, TimeZone, String, String)
*
* @param logFileDateFormat format string that is passed to {@link RolloverFileOutputStream}
*/
public void setFilenameDateFormat(String logFileDateFormat)
{
_filenameDateFormat = logFileDateFormat;
}
/* ------------------------------------------------------------ */
/**
* Retrieve the file name date format string.
*
* @return the log File Date Format
*/
public String getFilenameDateFormat()
{
return _filenameDateFormat;
}
/* ------------------------------------------------------------ */
@Override
public void write(String requestEntry) throws IOException
{
synchronized(this)
{
if (_writer==null)
return;
_writer.write(requestEntry);
_writer.write(StringUtil.__LINE_SEPARATOR);
_writer.flush();
}
}
/* ------------------------------------------------------------ */
/**
* Set up request logging and open log file.
*
* @see org.eclipse.jetty.util.component.AbstractLifeCycle#doStart()
*/
@Override
protected synchronized void doStart() throws Exception
{
if (_filename != null)
{
_fileOut = new RolloverFileOutputStream(_filename,_append,_retainDays,TimeZone.getTimeZone(getLogTimeZone()),_filenameDateFormat,null);
_closeOut = true;
LOG.info("Opened " + getDatedFilename());
}
else
_fileOut = System.err;
_out = _fileOut;
synchronized(this)
{
_writer = new OutputStreamWriter(_out);
}
super.doStart();
}
/* ------------------------------------------------------------ */
/**
* Close the log file and perform cleanup.
*
* @see org.eclipse.jetty.util.component.AbstractLifeCycle#doStop()
*/
@Override
protected void doStop() throws Exception
{
synchronized (this)
{
super.doStop();
try
{
if (_writer != null)
_writer.flush();
}
catch (IOException e)
{
LOG.ignore(e);
}
if (_out != null && _closeOut)
try
{
_out.close();
}
catch (IOException e)
{
LOG.ignore(e);
}
_out = null;
_fileOut = null;
_closeOut = false;
_writer = null;
}
}
}