001    /**
002     * Licensed to the Apache Software Foundation (ASF) under one or more
003     * contributor license agreements.  See the NOTICE file distributed with
004     * this work for additional information regarding copyright ownership.
005     * The ASF licenses this file to You under the Apache License, Version 2.0
006     * (the "License"); you may not use this file except in compliance with
007     * the License.  You may obtain a copy of the License at
008     *
009     *      http://www.apache.org/licenses/LICENSE-2.0
010     *
011     * Unless required by applicable law or agreed to in writing, software
012     * distributed under the License is distributed on an "AS IS" BASIS,
013     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014     * See the License for the specific language governing permissions and
015     * limitations under the License.
016     */
017    package org.apache.camel.util.concurrent;
018    
019    import java.util.concurrent.Callable;
020    import java.util.concurrent.FutureTask;
021    
022    import org.apache.camel.Rejectable;
023    
024    /**
025     * A {@link Rejectable} {@link FutureTask} used by {@link RejectableThreadPoolExecutor}.
026     *
027     * @see RejectableThreadPoolExecutor
028     */
029    public class RejectableFutureTask<V> extends FutureTask<V> implements Rejectable {
030    
031        private final Rejectable rejectable;
032    
033        public RejectableFutureTask(Callable<V> callable) {
034            super(callable);
035            this.rejectable = callable instanceof Rejectable ? (Rejectable) callable : null;
036        }
037    
038        public RejectableFutureTask(Runnable runnable, V result) {
039            super(runnable, result);
040            this.rejectable = runnable instanceof Rejectable ? (Rejectable) runnable : null;
041        }
042    
043        @Override
044        public void reject() {
045            if (rejectable != null) {
046                rejectable.reject();
047            }
048        }
049    
050    }