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.cassandra.inject;
  
  import java.util.concurrent.CountDownLatch;
  import java.util.concurrent.TimeUnit;
  
  public class CyclicBarrier
  {
      private static final int LATCH_TIMEOUT_SECONDS = 20;
  
      public final String name;
      public final int parties;
      public final boolean cyclic;
  
      private CountDownLatch latch;
  
      public CyclicBarrier(String name, int parties, boolean cyclic)
      {
          this.name = name;
          this.parties = parties;
          this.cyclic = cyclic;
          this.latch = new CountDownLatch(parties);
      }
  
      public void await() throws InterruptedException
      {
          await(true, true);
      }
  
      public void await(boolean doCountDown, boolean doAwait) throws InterruptedException
      {
          if (doCountDown)
          {
              latch.countDown();
          }
          if (doAwait)
          {
              latch.await(LATCH_TIMEOUT_SECONDS, TimeUnit.SECONDS);
              if (cyclic)
              {
                  reset();
              }
          }
      }
  
      public void reset()
      {
          latch = new CountDownLatch(parties);
      }
  
      public long getCount()
      {
          return latch.getCount();
      }
  }
  