/*
 * 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.solr.util;

import java.util.concurrent.TimeUnit;

import static java.util.concurrent.TimeUnit.NANOSECONDS;

public class TimeOut {

  private final long timeoutAt, startTime;

  public TimeOut(long interval, TimeUnit unit) {
    startTime = System.nanoTime();
    this.timeoutAt = startTime + NANOSECONDS.convert(interval, unit);
  }

  public boolean hasTimedOut() {
    return System.nanoTime() > timeoutAt;
  }

  public long timeLeft(TimeUnit unit) {
    return unit.convert(timeoutAt - System.nanoTime(), NANOSECONDS);
  }

  public long timeElapsed(TimeUnit unit) {
    return unit.convert(System.nanoTime() - startTime, NANOSECONDS);
  }
}