FutureListener.java

/*
 * 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.karaf.features.internal.download.impl;

/**
 * Something interested in being notified when the completion
 * of an asynchronous download operation : {@link DefaultFuture}.
 *
 */
public interface FutureListener<T extends DefaultFuture> {

    /**
     * Invoked when the operation associated with the {@link DefaultFuture}
     * has been completed even if you add the listener after the completion.
     *
     * @param future The source {@link DefaultFuture} which called this
     *               callback.
     */
    void operationComplete(T future);

}