CyclicBufferTracker.java

/**
 * Logback: the reliable, generic, fast and flexible logging framework.
 * Copyright (C) 1999-2013, 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 ch.qos.logback.core.spi;

import ch.qos.logback.core.helpers.CyclicBuffer;

import java.util.*;

/**
 * CyclicBufferTracker tracks  {@link CyclicBuffer} instances.
 *
 * @author Ceki Gücü
 */
public class CyclicBufferTracker<E> extends AbstractComponentTracker<CyclicBuffer<E>> {

  static final int DEFAULT_NUMBER_OF_BUFFERS = 64;

  static final int DEFAULT_BUFFER_SIZE = 256;
  int bufferSize = DEFAULT_BUFFER_SIZE;


  public CyclicBufferTracker() {
    super();
    setMaxComponents(DEFAULT_NUMBER_OF_BUFFERS);
  }

  public int getBufferSize() {
    return bufferSize;
  }

  public void setBufferSize(int bufferSize) {
    this.bufferSize = bufferSize;
  }

  @Override
  protected void processPriorToRemoval(CyclicBuffer<E> component) {
    component.clear();
  }

  @Override
  protected CyclicBuffer<E> buildComponent(String key) {
    return  new CyclicBuffer<E>(bufferSize);
  }

  @Override
  protected boolean isComponentStale(CyclicBuffer<E> eCyclicBuffer) {
    return false;
  }

  // for testing purposes
  List<String> liveKeysAsOrderedList() {
    return new ArrayList<String>(liveMap.keySet());
  }

  List<String> lingererKeysAsOrderedList() {
    return new ArrayList<String>(lingerersMap.keySet());

  }

}