1 //
2 // ========================================================================
3 // Copyright (c) 1995-2013 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.spdy.generator;
20
21 import java.nio.ByteBuffer;
22
23 import org.eclipse.jetty.io.ByteBufferPool;
24 import org.eclipse.jetty.spdy.frames.ControlFrame;
25 import org.eclipse.jetty.spdy.frames.PingFrame;
26 import org.eclipse.jetty.util.BufferUtil;
27
28 public class PingGenerator extends ControlFrameGenerator
29 {
30 public PingGenerator(ByteBufferPool bufferPool)
31 {
32 super(bufferPool);
33 }
34
35 @Override
36 public ByteBuffer generate(ControlFrame frame)
37 {
38 PingFrame ping = (PingFrame)frame;
39
40 int frameBodyLength = 4;
41 int totalLength = ControlFrame.HEADER_LENGTH + frameBodyLength;
42 ByteBuffer buffer = getByteBufferPool().acquire(totalLength, Generator.useDirectBuffers);
43 BufferUtil.clearToFill(buffer);
44 generateControlFrameHeader(ping, frameBodyLength, buffer);
45
46 buffer.putInt(ping.getPingId());
47
48 buffer.flip();
49 return buffer;
50 }
51 }