/**
* The contents of this file are subject to the OpenMRS Public License
* Version 1.0 (the "License"); you may not use this file except in
* compliance with the License. You may obtain a copy of the License at
* http://license.openmrs.org
*
* Software distributed under the License is distributed on an "AS IS"
* basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
* License for the specific language governing rights and limitations
* under the License.
*
* Copyright (C) OpenMRS, LLC. All Rights Reserved.
*/
package org.openmrs.util;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import org.apache.commons.collections.buffer.CircularFifoBuffer;
import org.apache.log4j.AppenderSkeleton;
import org.apache.log4j.Layout;
import org.apache.log4j.spi.LoggingEvent;
/**
* This class stores a few lines of the output to the log file. This class is set in the log4j
* descriptor file: /metadata/api/log4j/log4j.xml
*/
public class MemoryAppender extends AppenderSkeleton {
private CircularFifoBuffer buffer;
private int bufferSize = 100;
public MemoryAppender() {
}
protected void append(LoggingEvent loggingEvent) {
if (buffer != null) {
buffer.add(loggingEvent);
}
}
public void close() {
buffer.clear();
}
public boolean requiresLayout() {
return true;
}
public void activateOptions() {
this.buffer = new CircularFifoBuffer(bufferSize);
}
public List<String> getLogLines() {
List<String> logLines = new ArrayList<String>(buffer.size());
Layout layout = this.getLayout();
for (Iterator<?> iterBuffer = buffer.iterator(); iterBuffer.hasNext();) {
LoggingEvent loggingEvent = (LoggingEvent) iterBuffer.next();
logLines.add(layout.format(loggingEvent));
}
return logLines;
}
public int getBufferSize() {
return bufferSize;
}
public void setBufferSize(int bufferSize) {
this.bufferSize = bufferSize;
}
}