content: /*
   * 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.activemq.artemis.utils;
  
  import java.util.concurrent.TimeUnit;
  import java.util.concurrent.locks.LockSupport;
  
  public class Waiter {
  
     public interface Condition {
  
        boolean result();
     }
  
     /**
      * This method will wait for the condition.result to be true or a timeout has ocurred. it will return the last
      * result.
      */
     public static boolean waitFor(Condition condition, TimeUnit unit, long timeout, TimeUnit parkUnit, long parkTime) {
        long timeoutNanos = unit.toNanos(timeout);
        final long deadline = System.nanoTime() + timeoutNanos;
        long parkNanos = parkUnit.toNanos(parkTime);
        while (!condition.result() && (System.nanoTime() - deadline) < 0) {
           // Wait some time
           LockSupport.parkNanos(parkNanos);
        }
        return condition.result();
     }
  }
  