/**
    * Logback: the reliable, generic, fast and flexible logging framework.
    * Copyright (C) 1999-2011, 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 chapters.appenders.mail;
  
  import ch.qos.logback.core.boolex.EvaluationException;
  import ch.qos.logback.core.boolex.EventEvaluator;
  import ch.qos.logback.core.spi.ContextAwareBase;
  
  /**
   * A simple EventEvaluator implementation that triggers email transmission after
   * 1024 events regardless of event level.
   */
  public class CounterBasedEvaluator extends ContextAwareBase implements EventEvaluator {
  
    static int LIMIT = 1024;
    int counter = 0;
    String name;
    boolean started;
  
    public boolean evaluate(Object event) throws NullPointerException,
        EvaluationException {
      counter++;
  
      if (counter == LIMIT) {
        counter = 0;
  
        return true;
      } else {
        return false;
      }
    }
  
    public String getName() {
      return name;
    }
  
    public void setName(String name) {
      this.name = name;
    }
  
    public boolean isStarted() {
      return started;
    }
  
    public void start() {
      started = true;
    }
  
    public void stop() {
      started = false;
    }
  }