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.util;
  
  
  import java.util.concurrent.TimeUnit;
  
  public class Wait {
  
      public static final long MAX_WAIT_MILLIS = 30*1000;
      public static final long SLEEP_MILLIS = 1000;
  
      public interface Condition {
          boolean isSatisified() throws Exception;
      }
  
      public static boolean waitFor(Condition condition) throws Exception {
          return waitFor(condition, MAX_WAIT_MILLIS);
      }
  
      public static boolean waitFor(final Condition condition, final long duration) throws Exception {
          return waitFor(condition, duration, SLEEP_MILLIS);
      }
  
      public static boolean waitFor(final Condition condition, final long duration, final long sleepMillis) throws Exception {
  
          final long expiry = System.currentTimeMillis() + duration;
          boolean conditionSatisified = condition.isSatisified();
          while (!conditionSatisified && System.currentTimeMillis() < expiry) {
              TimeUnit.MILLISECONDS.sleep(sleepMillis);
              conditionSatisified = condition.isSatisified();
          }
          return conditionSatisified;
      }
  }
  