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1   /*
2    * Copyright 2019 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.netty.handler.codec.http2;
17  
18  /**
19   * An ack for a previously received {@link Http2SettingsFrame}.
20   * <p>
21   * The <a href="https://tools.ietf.org/html/rfc7540#section-6.5">HTTP/2 protocol</a> enforces that ACKs are applied in
22   * order, so this ACK will apply to the earliest received and not yet ACKed {@link Http2SettingsFrame} frame.
23   */
24  public interface Http2SettingsAckFrame extends Http2Frame {
25      Http2SettingsAckFrame INSTANCE = new DefaultHttp2SettingsAckFrame();
26  
27      @Override
28      String name();
29  }