1 /*
2 * Copyright 2021 The Netty Project
3 *
4 * The Netty Project licenses this file to you under the Apache License,
5 * version 2.0 (the "License"); you may not use this file except in compliance
6 * with the License. You may obtain a copy of the License at:
7 *
8 * https://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
12 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
13 * License for the specific language governing permissions and limitations
14 * under the License.
15 */
16 package io.netty5.util.concurrent;
17
18 /**
19 * Listens to the result of a {@link Future}. The result of the asynchronous operation is notified once this listener
20 * is added by calling {@link Future#addListener(Object, FutureContextListener)}.
21 * <pre>
22 * Future f = new DefaultPromise(..);
23 * f.addListener(context, (context, future) -> { .. });
24 * </pre>
25 */
26 @FunctionalInterface
27 public interface FutureContextListener<C, V> {
28 /**
29 * Invoked when the operation associated with the {@link Future} has been completed.
30 *
31 * @param future the source {@link Future} which called this callback
32 */
33 void operationComplete(C context, Future<? extends V> future) throws Exception;
34 }