org.terracotta.angela.common.util.TimeBudget Maven / Gradle / Ivy

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/*
 * Copyright Terracotta, Inc.
 *
 * Licensed 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.terracotta.angela.common.util;

import java.util.concurrent.TimeUnit;

public class TimeBudget {
  private final long budgetExpiry;
  private final TimeUnit timeUnit;

  public TimeBudget(long timeout, TimeUnit timeUnit) {
    this.timeUnit = timeUnit;
    this.budgetExpiry = System.nanoTime() + TimeUnit.NANOSECONDS.convert(timeout, timeUnit);
  }

  public long remaining() {
    return remaining(timeUnit);
  }

  public boolean isDepleted() {
    return remaining() <= 0;
  }

  public long remaining(TimeUnit timeUnit) {
    long now = System.nanoTime();
    long remaining = budgetExpiry - now;
    return timeUnit.convert(remaining, TimeUnit.NANOSECONDS);
  }

  @Override
  public String toString() {
    return "TimeBudget{" +
        "budgetExpiry=" + budgetExpiry +
        ", remaining=" + remaining() +
        ", timeUnit=" + timeUnit +
        '}';
  }
}