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.net;
  
  import io.netty.util.concurrent.Future; //checkstyle: permit this import
  
  /**
   * An abstraction for yielding a result performed by an asynchronous task,
   * for whom we may wish to offer cancellation, but no other access to the underlying task
   */
  public class FutureResult<V> extends FutureDelegate<V>
  {
      private final Future<?> tryCancel;
  
      /**
       * @param result the Future that will be completed by {@link #cancel}
       * @param cancel the Future that is performing the work, and to whom any cancellation attempts will be proxied
       */
      public FutureResult(Future<V> result, Future<?> cancel)
      {
          super(result);
          this.tryCancel = cancel;
      }
  
      @Override
      public boolean cancel(boolean b)
      {
          tryCancel.cancel(true);
          return delegate.cancel(b);
      }
  }
  