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// --- BEGIN COPYRIGHT BLOCK ---
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; version 2 of the License.
//
// 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 General Public License for more details.
//
// You should have received a copy of the GNU General Public License along
// with this program; if not, write to the Free Software Foundation, Inc.,
// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
//
// (C) 2007 Red Hat, Inc.
// All rights reserved.
// --- END COPYRIGHT BLOCK ---
package com.netscape.cmscore.logging;
import java.util.Vector;
import com.netscape.certsrv.logging.ELogException;
import com.netscape.certsrv.logging.ILogEvent;
import com.netscape.certsrv.logging.ILogEventListener;
import com.netscape.certsrv.logging.ILogQueue;
/**
* A class represents a log queue.
* <P>
*
* @author mzhao
* @version $Revision$, $Date$
*/
public class LogQueue implements ILogQueue {
private static LogQueue mLogQueue = new LogQueue();
protected Vector<ILogEventListener> mListeners = null;
/**
* Constructs a log queue.
*/
public LogQueue() {
}
public static ILogQueue getLogQueue() {
return mLogQueue;
}
/**
* Initializes the log queue.
* <P>
*
*/
public void init() {
mListeners = new Vector<ILogEventListener>();
}
/**
* Stops this log queue: shuts down all registered listeners
* <P>
*/
public void shutdown() {
if (mListeners == null)
return;
for (int i = 0; i < mListeners.size(); i++) {
mListeners.elementAt(i).shutdown();
}
}
/**
* Adds an event listener.
*
* @param listener the log event listener
*/
public void addLogEventListener(ILogEventListener listener) {
//Make sure we don't have duplicated listener
if (!mListeners.contains(listener))
mListeners.addElement(listener);
}
/**
* Removes an event listener.
*
* @param listener the log event listener
*/
public void removeLogEventListener(ILogEventListener listener) {
mListeners.removeElement(listener);
}
/**
* Logs an event, and notifies logger to reuse the event.
*
* @param event the log event
*/
public void log(ILogEvent event) {
if (mListeners == null)
return;
for (int i = 0; i < mListeners.size(); i++) {
try {
mListeners.elementAt(i).log(event);
} catch (ELogException e) {
// Raidzilla Bug #57592: Don't display potentially
// incorrect log message.
// ConsoleError.send(new SystemEvent(CMS.getUserMessage("CMS_LOG_EVENT_FAILED",
// event.getEventType(), e.toString())));
// Don't do this again.
removeLogEventListener(mListeners.elementAt(i));
}
}
}
/**
* Flushes the log buffers (if any)
*/
public void flush() {
for (int i = 0; i < mListeners.size(); i++) {
mListeners.elementAt(i).flush();
}
}
}
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