com.greenpepper.internal.ch.qos.logback.core.read.CyclicBufferAppender Maven / Gradle / Ivy
/**
* Logback: the reliable, generic, fast and flexible logging framework.
* Copyright (C) 1999-2015, QOS.ch. All rights reserved.
*
* This program and the accompanying materials are dual-licensed under
* either the terms of the Eclipse Public License v1.0 as published by
* the Eclipse Foundation
*
* or (per the licensee's choosing)
*
* under the terms of the GNU Lesser General Public License version 2.1
* as published by the Free Software Foundation.
*/
package com.greenpepper.internal.com.greenpepper.internal.ch.qos.logback.core.read;
import com.greenpepper.internal.com.greenpepper.internal.ch.qos.logback.core.AppenderBase;
import com.greenpepper.internal.com.greenpepper.internal.ch.qos.logback.core.helpers.CyclicBuffer;
/**
* CyclicBufferAppender stores events in a cyclic buffer of user-specified size. As the
* name suggests, if the size of the buffer is N, only the latest N events are available.
*
*
* @author Ceki Gulcu
*/
public class CyclicBufferAppender extends AppenderBase {
CyclicBuffer cb;
int maxSize = 512;
public void start() {
cb = new CyclicBuffer(maxSize);
super.start();
}
public void stop() {
cb = null;
super.stop();
}
@Override
protected void append(E eventObject) {
if (!isStarted()) {
return;
}
cb.add(eventObject);
}
public int getLength() {
if (isStarted()) {
return cb.length();
} else {
return 0;
}
}
public E get(int i) {
if (isStarted()) {
return cb.get(i);
} else {
return null;
}
}
public void reset() {
cb.clear();
}
/**
* Set the size of the cyclic buffer.
*/
public int getMaxSize() {
return maxSize;
}
public void setMaxSize(int maxSize) {
this.maxSize = maxSize;
}
}