Mercurial > hg > blitz_stable
view src/com/go/trove/log/LogEventParsingWriter.java @ 32:243c74d599bf
Update ignores
author | Dan Creswell <dan.creswell@gmail.com> |
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date | Sat, 12 Jun 2010 10:41:47 +0100 |
parents | 3dc0c5604566 |
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/* ==================================================================== * Trove - Copyright (c) 1997-2000 Walt Disney Internet Group * ==================================================================== * The Tea Software License, Version 1.1 * * Copyright (c) 2000 Walt Disney Internet Group. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in * the documentation and/or other materials provided with the * distribution. * * 3. The end-user documentation included with the redistribution, * if any, must include the following acknowledgment: * "This product includes software developed by the * Walt Disney Internet Group (http://opensource.go.com/)." * Alternately, this acknowledgment may appear in the software itself, * if and wherever such third-party acknowledgments normally appear. * * 4. The names "Tea", "TeaServlet", "Kettle", "Trove" and "BeanDoc" must * not be used to endorse or promote products derived from this * software without prior written permission. For written * permission, please contact opensource@dig.com. * * 5. Products derived from this software may not be called "Tea", * "TeaServlet", "Kettle" or "Trove", nor may "Tea", "TeaServlet", * "Kettle", "Trove" or "BeanDoc" appear in their name, without prior * written permission of the Walt Disney Internet Group. * * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE * DISCLAIMED. IN NO EVENT SHALL THE WALT DISNEY INTERNET GROUP OR ITS * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * ==================================================================== * * For more information about Tea, please see http://opensource.go.com/. */ package com.go.trove.log; import java.io.*; import java.util.*; /****************************************************************************** * LogEventParsingWriter parses the data written to it and converts it * to LogEvent objects. Add a LogListener to intercept LogEvents. Events are * parsed based on newline characters (LF, CRLF or CR) or a switch to a * different thread. * * @author Brian S O'Neill * @version * <!--$$Revision: 1.1 $-->, <!--$$JustDate:--> 9/07/00 <!-- $--> */ public class LogEventParsingWriter extends Writer { private Vector mListeners; private Log mSource; private int mType; private CharArrayWriter mMessageBuffer; private Thread mMessageThread; private Date mTimestamp; // Set to true upon reading a CR so that if the next character is a LF, // it is consumed. This is how CRLF patterns are discovered. private boolean mTrackLF; /** * @param source Source object to create events with. * @param type Type of events to create. */ public LogEventParsingWriter(Log source, int type) { mListeners = new Vector(2); mSource = source; mType = type; mMessageBuffer = new CharArrayWriter(); } /** * @param source Source object to create events with. * @param type Type of events to create. * @param lock Synchronization lock. */ public LogEventParsingWriter(Log source, int type, Object lock) { super(lock); mListeners = new Vector(2); mSource = source; mType = type; mMessageBuffer = new CharArrayWriter(); } public void addLogListener(LogListener listener) { mListeners.addElement(listener); } public void removeLogListener(LogListener listener) { mListeners.removeElement(listener); } private void flushLogEvent() { synchronized (lock) { if (mMessageThread == null) { return; } String message = mMessageBuffer.toString(); if (mMessageBuffer.size() > 10000) { mMessageBuffer = new CharArrayWriter(); } else { mMessageBuffer.reset(); } LogEvent e; if (mTimestamp == null) { e = new LogEvent(mSource, mType, message, mMessageThread); } else { e = new LogEvent(mSource, mType, message, mMessageThread, mTimestamp); mTimestamp = null; } synchronized (mListeners) { Enumeration group = mListeners.elements(); while (group.hasMoreElements()) { ((LogListener)group.nextElement()).logMessage(e); } } } } public void write(char[] array, int off, int len) throws IOException { synchronized (lock) { if (!isEnabled()) { if (mMessageBuffer.size() > 0) { flushLogEvent(); } return; } Thread current = Thread.currentThread(); if (current != mMessageThread) { if (mMessageBuffer.size() > 0) { flushLogEvent(); } mMessageThread = current; } int writtenLength = 0; int i = 0; for (i=0; i<len; i++) { char c = array[i + off]; if (c == '\r') { mTrackLF = true; writeToBuffer(array, writtenLength + off, i - writtenLength); // Add one more than i to skip the CR. writtenLength = i + 1; flushLogEvent(); } else if (c == '\n') { if (mTrackLF) { // Consume the LF of CRLF. mTrackLF = false; writtenLength++; } else { writeToBuffer(array, writtenLength + off, i - writtenLength); // Add one more than i to skip the LF. writtenLength = i + 1; flushLogEvent(); } } else { mTrackLF = false; } } writeToBuffer(array, writtenLength + off, i - writtenLength); } } public void flush() throws IOException { } public void close() throws IOException { synchronized (lock) { mMessageBuffer.close(); } } /** * Returning false discards written data, and events are not generated. * Default implementation always returns true. */ public boolean isEnabled() { return true; } private void writeToBuffer(char[] array, int off, int len) { if (mMessageBuffer.size() == 0) { mTimestamp = new Date(); } mMessageBuffer.write(array, off, len); } }