slider-core/src/main/java/org/apache/slider/common/tools/Duration.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 *  or more contributor license agreements.  See the NOTICE file
 *  distributed with this work for additional information
 *  regarding copyright ownership.  The ASF licenses this file
 *  to you under the Apache License, Version 2.0 (the
 *  "License"); you may not use this file except in compliance
 *  with the License.  You may obtain a copy of the License at
 *
 *       http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */

package org.apache.slider.common.tools;

/**
 * A duration in milliseconds
 */
public class Duration {
  public long start, finish;
  public final long limit;

  public Duration() {
    this(0);
  }

  public Duration(long limit) {
    this.limit = limit;
  }

  public Duration start() {
    start = System.currentTimeMillis();
    return this;
  }

  public void finish() {
    finish = System.currentTimeMillis();
  }

  public long getInterval() {
    return finish - start;
  }

  public boolean getLimitExceeded() {
    return limit >= 0 && ((System.currentTimeMillis() - start) > limit);
  }

  @Override
  public String toString() {
    return "Duration " +
           ((finish >= start)
            ? (" of " + getInterval() + " millis")
            : "undefined");
  }


}