/*
* Eoulsan development code
*
* This code may be freely distributed and modified under the
* terms of the GNU Lesser General Public License version 2.1 or
* later and CeCILL-C. This should be distributed with the code.
* If you do not have a copy, see:
*
* http://www.gnu.org/licenses/lgpl-2.1.txt
* http://www.cecill.info/licences/Licence_CeCILL-C_V1-en.txt
*
* Copyright for this code is held jointly by the Genomic platform
* of the Institut de Biologie de l'École normale supérieure and
* the individual authors. These should be listed in @author doc
* comments.
*
* For more information on the Eoulsan project and its aims,
* or to join the Eoulsan Google group, visit the home page
* at:
*
* http://outils.genomique.biologie.ens.fr/eoulsan
*
*/
package fr.ens.biologie.genomique.eoulsan;
import java.util.ArrayList;
import java.util.LinkedList;
import java.util.List;
import java.util.Queue;
import java.util.logging.Formatter;
import java.util.logging.Handler;
import java.util.logging.Level;
import java.util.logging.LogRecord;
/**
* This class define a buffered handler.
* @author Laurent Jourdren
* @since 2.0
*/
public class BufferedHandler extends Handler {
private final List<Handler> handlers = new ArrayList<>();
private final Queue<LogRecord> records = new LinkedList<>();
private boolean flushed = false;
/**
* Add an Handler.
* @param handler Handler to had
*/
public void addHandler(final Handler handler) {
if (handler != null) {
if (getLevel() != null) {
handler.setLevel(getLevel());
}
if (getFormatter() != null) {
handler.setFormatter(getFormatter());
}
this.handlers.add(handler);
}
}
//
// Handler methods
//
@Override
public void close() throws SecurityException {
for (Handler h : this.handlers) {
h.close();
}
}
@Override
public void flush() {
if (!this.flushed) {
LogRecord record = null;
while ((record = this.records.poll()) != null) {
for (Handler h : this.handlers) {
h.publish(record);
}
}
this.flushed = true;
}
for (Handler h : this.handlers) {
h.flush();
}
}
@Override
public void publish(final LogRecord record) {
if (!this.flushed) {
this.records.add(record);
} else {
for (Handler h : this.handlers) {
h.publish(record);
}
}
}
@Override
public synchronized void setLevel(final Level newLevel)
throws SecurityException {
super.setLevel(newLevel);
for (Handler h : this.handlers) {
h.setLevel(newLevel);
}
}
@Override
public synchronized void setFormatter(final Formatter newFormatter)
throws SecurityException {
super.setFormatter(newFormatter);
for (Handler h : this.handlers) {
h.setFormatter(newFormatter);
}
}
}