1 // This source code is dual-licensed under the Apache License, version
2 // 2.0, and the Mozilla Public License, version 1.1.
6 //---------------------------------------------------------------------------
7 // Copyright (C) 2007-2009 LShift Ltd., Cohesive Financial
8 // Technologies LLC., and Rabbit Technologies Ltd.
10 // Licensed under the Apache License, Version 2.0 (the "License");
11 // you may not use this file except in compliance with the License.
12 // You may obtain a copy of the License at
14 // http://www.apache.org/licenses/LICENSE-2.0
16 // Unless required by applicable law or agreed to in writing, software
17 // distributed under the License is distributed on an "AS IS" BASIS,
18 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
19 // See the License for the specific language governing permissions and
20 // limitations under the License.
21 //---------------------------------------------------------------------------
25 //---------------------------------------------------------------------------
26 // The contents of this file are subject to the Mozilla Public License
27 // Version 1.1 (the "License"); you may not use this file except in
28 // compliance with the License. You may obtain a copy of the License at
29 // http://www.rabbitmq.com/mpl.html
31 // Software distributed under the License is distributed on an "AS IS"
32 // basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
33 // License for the specific language governing rights and limitations
36 // The Original Code is The RabbitMQ .NET Client.
38 // The Initial Developers of the Original Code are LShift Ltd,
39 // Cohesive Financial Technologies LLC, and Rabbit Technologies Ltd.
41 // Portions created before 22-Nov-2008 00:00:00 GMT by LShift Ltd,
42 // Cohesive Financial Technologies LLC, or Rabbit Technologies Ltd
43 // are Copyright (C) 2007-2008 LShift Ltd, Cohesive Financial
44 // Technologies LLC, and Rabbit Technologies Ltd.
46 // Portions created by LShift Ltd are Copyright (C) 2007-2009 LShift
47 // Ltd. Portions created by Cohesive Financial Technologies LLC are
48 // Copyright (C) 2007-2009 Cohesive Financial Technologies
49 // LLC. Portions created by Rabbit Technologies Ltd are Copyright
50 // (C) 2007-2009 Rabbit Technologies Ltd.
52 // All Rights Reserved.
54 // Contributor(s): ______________________________________.
56 //---------------------------------------------------------------------------
59 using System.Collections;
63 // We use spec version 0-9 for common constants such as frame types
64 // and the frame end byte, since they don't vary *within the versions
65 // we support*. Obviously we may need to revisit this if that ever
67 using CommonFraming = RabbitMQ.Client.Framing.v0_9;
68 using System.Diagnostics;
71 namespace RabbitMQ.Client.Impl {
72 public class Command {
73 private static readonly byte[] m_emptyByteArray = new byte[0];
75 // EmptyContentBodyFrameSize, 8 = 1 + 2 + 4 + 1
76 // - 1 byte of frame type
77 // - 2 bytes of channel number
78 // - 4 bytes of frame payload length
79 // - 1 byte of payload trailer FrameEnd byte
80 public const int EmptyContentBodyFrameSize = 8;
83 CheckEmptyContentBodyFrameSize();
86 public static void CheckEmptyContentBodyFrameSize() {
87 Frame f = new Frame(CommonFraming.Constants.FrameBody, 0, m_emptyByteArray);
88 MemoryStream stream = new MemoryStream();
89 NetworkBinaryWriter writer = new NetworkBinaryWriter(stream);
91 long actualLength = stream.Length;
93 if (EmptyContentBodyFrameSize != actualLength) {
95 string.Format("EmptyContentBodyFrameSize is incorrect - defined as {0} where the computed value is in fact {1}.",
96 EmptyContentBodyFrameSize,
98 throw new ProtocolViolationException(message);
102 ///////////////////////////////////////////////////////////////////////////
104 public MethodBase m_method;
105 public ContentHeaderBase m_header;
106 public byte[] m_body0;
107 public ArrayList m_bodyN;
109 public MethodBase Method { get { return m_method; } }
110 public ContentHeaderBase Header { get { return m_header; } }
111 public byte[] Body { get { return ConsolidateBody(); } }
113 public Command(): this(null, null, null) {}
115 public Command(MethodBase method): this(method, null, null) {}
117 public Command(MethodBase method, ContentHeaderBase header, byte[] body) {
124 public byte[] ConsolidateBody() {
125 if (m_bodyN == null) {
126 return (m_body0 == null) ? m_emptyByteArray : m_body0;
128 int totalSize = m_body0.Length;
129 foreach (byte[] fragment in m_bodyN) {
130 totalSize += fragment.Length;
132 byte[] result = new byte[totalSize];
133 Array.Copy(m_body0, 0, result, 0, m_body0.Length);
134 int offset = m_body0.Length;
135 foreach (byte[] fragment in m_bodyN) {
136 Array.Copy(fragment, 0, result, offset, fragment.Length);
137 offset += fragment.Length;
145 public void AppendBodyFragment(byte[] fragment) {
146 if (m_body0 == null) {
149 if (m_bodyN == null) {
150 m_bodyN = new ArrayList();
152 m_bodyN.Add(fragment);
156 public void Transmit(int channelNumber, ConnectionBase connection) {
157 Frame frame = new Frame(CommonFraming.Constants.FrameMethod, channelNumber);
158 NetworkBinaryWriter writer = frame.GetWriter();
159 writer.Write((ushort) m_method.ProtocolClassId);
160 writer.Write((ushort) m_method.ProtocolMethodId);
161 MethodArgumentWriter argWriter = new MethodArgumentWriter(writer);
162 m_method.WriteArgumentsTo(argWriter);
164 connection.WriteFrame(frame);
166 if (m_method.HasContent) {
169 frame = new Frame(CommonFraming.Constants.FrameHeader, channelNumber);
170 writer = frame.GetWriter();
171 writer.Write((ushort) m_header.ProtocolClassId);
172 m_header.WriteTo(writer, (ulong) body.Length);
173 connection.WriteFrame(frame);
175 int frameMax = (int) Math.Min(int.MaxValue, connection.FrameMax);
176 int bodyPayloadMax = (frameMax == 0)
178 : frameMax - EmptyContentBodyFrameSize;
179 for (int offset = 0; offset < body.Length; offset += bodyPayloadMax) {
180 int remaining = body.Length - offset;
182 frame = new Frame(CommonFraming.Constants.FrameBody, channelNumber);
183 writer = frame.GetWriter();
184 writer.Write(body, offset,
185 (remaining < bodyPayloadMax) ? remaining : bodyPayloadMax);
186 connection.WriteFrame(frame);