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1   /*
2    * Copyright 2014 The Netty Project
3    *
4    * The Netty Project licenses this file to you under the Apache License, version 2.0 (the
5    * "License"); you may not use this file except in compliance with the License. You may obtain a
6    * 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 distributed under the License
11   * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
12   * or implied. See the License for the specific language governing permissions and limitations under
13   * the License.
14   */
15  package io.netty.handler.codec.http2;
16  
17  import io.netty.buffer.ByteBuf;
18  import io.netty.channel.ChannelFuture;
19  import io.netty.channel.ChannelHandlerContext;
20  import io.netty.channel.ChannelPromise;
21  import io.netty.util.internal.UnstableApi;
22  
23  
24  /**
25   * Handler for outbound HTTP/2 traffic.
26   */
27  @UnstableApi
28  public interface Http2ConnectionEncoder extends Http2FrameWriter {
29  
30      /**
31       * Sets the lifecycle manager. Must be called as part of initialization before the encoder is used.
32       */
33      void lifecycleManager(Http2LifecycleManager lifecycleManager);
34  
35      /**
36       * Provides direct access to the underlying connection.
37       */
38      Http2Connection connection();
39  
40      /**
41       * Provides the remote flow controller for managing outbound traffic.
42       */
43      Http2RemoteFlowController flowController();
44  
45      /**
46       * Provides direct access to the underlying frame writer object.
47       */
48      Http2FrameWriter frameWriter();
49  
50      /**
51       * Gets the local settings on the top of the queue that has been sent but not ACKed. This may
52       * return {@code null}.
53       */
54      Http2Settings pollSentSettings();
55  
56      /**
57       * Sets the settings for the remote endpoint of the HTTP/2 connection.
58       */
59      void remoteSettings(Http2Settings settings) throws Http2Exception;
60  
61      /**
62       * Writes the given data to the internal {@link Http2FrameWriter} without performing any
63       * state checks on the connection/stream.
64       */
65      @Override
66      ChannelFuture writeFrame(ChannelHandlerContext ctx, byte frameType, int streamId,
67              Http2Flags flags, ByteBuf payload, ChannelPromise promise);
68  }