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1   //
2   //  ========================================================================
3   //  Copyright (c) 1995-2016 Mort Bay Consulting Pty. Ltd.
4   //  ------------------------------------------------------------------------
5   //  All rights reserved. This program and the accompanying materials
6   //  are made available under the terms of the Eclipse Public License v1.0
7   //  and Apache License v2.0 which accompanies this distribution.
8   //
9   //      The Eclipse Public License is available at
10  //      http://www.eclipse.org/legal/epl-v10.html
11  //
12  //      The Apache License v2.0 is available at
13  //      http://www.opensource.org/licenses/apache2.0.php
14  //
15  //  You may elect to redistribute this code under either of these licenses.
16  //  ========================================================================
17  //
18  
19  package org.eclipse.jetty.http2.generator;
20  
21  import java.nio.ByteBuffer;
22  
23  import org.eclipse.jetty.http2.Flags;
24  import org.eclipse.jetty.http2.frames.Frame;
25  import org.eclipse.jetty.http2.frames.FrameType;
26  import org.eclipse.jetty.http2.frames.ResetFrame;
27  import org.eclipse.jetty.io.ByteBufferPool;
28  import org.eclipse.jetty.util.BufferUtil;
29  
30  public class ResetGenerator extends FrameGenerator
31  {
32      public ResetGenerator(HeaderGenerator headerGenerator)
33      {
34          super(headerGenerator);
35      }
36  
37      @Override
38      public void generate(ByteBufferPool.Lease lease, Frame frame)
39      {
40          ResetFrame resetFrame = (ResetFrame)frame;
41          generateReset(lease, resetFrame.getStreamId(), resetFrame.getError());
42      }
43  
44      public void generateReset(ByteBufferPool.Lease lease, int streamId, int error)
45      {
46          if (streamId < 0)
47              throw new IllegalArgumentException("Invalid stream id: " + streamId);
48  
49          ByteBuffer header = generateHeader(lease, FrameType.RST_STREAM, 4, Flags.NONE, streamId);
50  
51          header.putInt(error);
52  
53          BufferUtil.flipToFlush(header, 0);
54          lease.append(header, true);
55      }
56  }