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/*
*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*
*/
package org.apache.qpid.framing;
import java.io.IOException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.apache.qpid.codec.MarkableDataInput;
import org.apache.qpid.protocol.AMQConstant;
public class AMQDataBlockDecoder
{
private Logger _logger = LoggerFactory.getLogger(AMQDataBlockDecoder.class);
private int _maxFrameSize = AMQConstant.FRAME_MIN_SIZE.getCode();
public AMQDataBlockDecoder()
{
}
public boolean decodable(MarkableDataInput in) throws AMQFrameDecodingException, IOException
{
final int remainingAfterAttributes = in.available() - (1 + 2 + 4 + 1);
// type, channel, body length and end byte
if (remainingAfterAttributes < 0)
{
return false;
}
in.mark(8);
in.skip(1 + 2);
// Get an unsigned int, lifted from MINA ByteBuffer getUnsignedInt()
final long bodySize = in.readInt() & 0xffffffffL;
if (bodySize > _maxFrameSize)
{
throw new AMQFrameDecodingException(AMQConstant.FRAME_ERROR,
"Incoming frame size of "
+ bodySize
+ " is larger than negotiated maximum of "
+ _maxFrameSize);
}
in.reset();
return (remainingAfterAttributes >= bodySize);
}
public void processInput(MethodProcessor processor,
MarkableDataInput in)
throws AMQFrameDecodingException, AMQProtocolVersionException, IOException
{
final byte type = in.readByte();
final int channel = in.readUnsignedShort();
final long bodySize = EncodingUtils.readUnsignedInteger(in);
// bodySize can be zero
if ((channel < 0) || (bodySize < 0))
{
throw new AMQFrameDecodingException(AMQConstant.FRAME_ERROR,
"Undecodable frame: type = " + type + " channel = " + channel
+ " bodySize = " + bodySize);
}
switch (type)
{
case 1:
processMethod(channel, in, processor);
break;
case 2:
ContentHeaderBody.process(channel, in, processor, bodySize);
break;
case 3:
ContentBody.process(channel, in, processor, bodySize);
break;
case 8:
HeartbeatBody.process(channel, in, processor, bodySize);
break;
default:
throw new AMQFrameDecodingException(AMQConstant.FRAME_ERROR, "Unsupported frame type: " + type);
}
byte marker = in.readByte();
if ((marker & 0xFF) != 0xCE)
{
throw new AMQFrameDecodingException(AMQConstant.FRAME_ERROR,
"End of frame marker not found. Read " + marker + " length=" + bodySize
+ " type=" + type);
}
}
public void setMaxFrameSize(final int maxFrameSize)
{
_maxFrameSize = maxFrameSize;
}
private void processMethod(int channelId,
MarkableDataInput in,
MethodProcessor dispatcher)
throws AMQFrameDecodingException, IOException
{
final int classAndMethod = in.readInt();
int classId = classAndMethod >> 16;
int methodId = classAndMethod & 0xFFFF;
dispatcher.setCurrentMethod(classId, methodId);
try
{
switch (classAndMethod)
{
//CONNECTION_CLASS:
case 0x000a000a:
ConnectionStartBody.process(in, dispatcher);
break;
case 0x000a000b:
ConnectionStartOkBody.process(in, dispatcher);
break;
case 0x000a0014:
ConnectionSecureBody.process(in, dispatcher);
break;
case 0x000a0015:
ConnectionSecureOkBody.process(in, dispatcher);
break;
case 0x000a001e:
ConnectionTuneBody.process(in, dispatcher);
break;
case 0x000a001f:
ConnectionTuneOkBody.process(in, dispatcher);
break;
case 0x000a0028:
ConnectionOpenBody.process(in, dispatcher);
break;
case 0x000a0029:
ConnectionOpenOkBody.process(in, dispatcher);
break;
case 0x000a002a:
ConnectionRedirectBody.process(in, dispatcher);
break;
case 0x000a0032:
if (dispatcher.getProtocolVersion().equals(ProtocolVersion.v8_0))
{
ConnectionRedirectBody.process(in, dispatcher);
}
else
{
ConnectionCloseBody.process(in, dispatcher);
}
break;
case 0x000a0033:
if (dispatcher.getProtocolVersion().equals(ProtocolVersion.v8_0))
{
throw newUnknownMethodException(classId, methodId,
dispatcher.getProtocolVersion());
}
else
{
dispatcher.receiveConnectionCloseOk();
}
break;
case 0x000a003c:
if (dispatcher.getProtocolVersion().equals(ProtocolVersion.v8_0))
{
ConnectionCloseBody.process(in, dispatcher);
}
else
{
throw newUnknownMethodException(classId, methodId,
dispatcher.getProtocolVersion());
}
break;
case 0x000a003d:
if (dispatcher.getProtocolVersion().equals(ProtocolVersion.v8_0))
{
dispatcher.receiveConnectionCloseOk();
}
else
{
throw newUnknownMethodException(classId, methodId,
dispatcher.getProtocolVersion());
}
break;
// CHANNEL_CLASS:
case 0x0014000a:
ChannelOpenBody.process(channelId, in, dispatcher);
break;
case 0x0014000b:
ChannelOpenOkBody.process(channelId, in, dispatcher.getProtocolVersion(), dispatcher);
break;
case 0x00140014:
ChannelFlowBody.process(channelId, in, dispatcher);
break;
case 0x00140015:
ChannelFlowOkBody.process(channelId, in, dispatcher);
break;
case 0x0014001e:
ChannelAlertBody.process(channelId, in, dispatcher);
break;
case 0x00140028:
ChannelCloseBody.process(channelId, in, dispatcher);
break;
case 0x00140029:
dispatcher.receiveChannelCloseOk(channelId);
break;
// ACCESS_CLASS:
case 0x001e000a:
AccessRequestBody.process(channelId, in, dispatcher);
break;
case 0x001e000b:
AccessRequestOkBody.process(channelId, in, dispatcher);
break;
// EXCHANGE_CLASS:
case 0x0028000a:
ExchangeDeclareBody.process(channelId, in, dispatcher);
break;
case 0x0028000b:
dispatcher.receiveExchangeDeclareOk(channelId);
break;
case 0x00280014:
ExchangeDeleteBody.process(channelId, in, dispatcher);
break;
case 0x00280015:
dispatcher.receiveExchangeDeleteOk(channelId);
break;
case 0x00280016:
ExchangeBoundBody.process(channelId, in, dispatcher);
break;
case 0x00280017:
ExchangeBoundOkBody.process(channelId, in, dispatcher);
break;
// QUEUE_CLASS:
case 0x0032000a:
QueueDeclareBody.process(channelId, in, dispatcher);
break;
case 0x0032000b:
QueueDeclareOkBody.process(channelId, in, dispatcher);
break;
case 0x00320014:
QueueBindBody.process(channelId, in, dispatcher);
break;
case 0x00320015:
dispatcher.receiveQueueBindOk(channelId);
break;
case 0x0032001e:
QueuePurgeBody.process(channelId, in, dispatcher);
break;
case 0x0032001f:
QueuePurgeOkBody.process(channelId, in, dispatcher);
break;
case 0x00320028:
QueueDeleteBody.process(channelId, in, dispatcher);
break;
case 0x00320029:
QueueDeleteOkBody.process(channelId, in, dispatcher);
break;
case 0x00320032:
QueueUnbindBody.process(channelId, in, dispatcher);
break;
case 0x00320033:
dispatcher.receiveQueueUnbindOk(channelId);
break;
// BASIC_CLASS:
case 0x003c000a:
BasicQosBody.process(channelId, in, dispatcher);
break;
case 0x003c000b:
dispatcher.receiveBasicQosOk(channelId);
break;
case 0x003c0014:
BasicConsumeBody.process(channelId, in, dispatcher);
break;
case 0x003c0015:
BasicConsumeOkBody.process(channelId, in, dispatcher);
break;
case 0x003c001e:
BasicCancelBody.process(channelId, in, dispatcher);
break;
case 0x003c001f:
BasicCancelOkBody.process(channelId, in, dispatcher);
break;
case 0x003c0028:
BasicPublishBody.process(channelId, in, dispatcher);
break;
case 0x003c0032:
BasicReturnBody.process(channelId, in, dispatcher);
break;
case 0x003c003c:
BasicDeliverBody.process(channelId, in, dispatcher);
break;
case 0x003c0046:
BasicGetBody.process(channelId, in, dispatcher);
break;
case 0x003c0047:
BasicGetOkBody.process(channelId, in, dispatcher);
break;
case 0x003c0048:
BasicGetEmptyBody.process(channelId, in, dispatcher);
break;
case 0x003c0050:
BasicAckBody.process(channelId, in, dispatcher);
break;
case 0x003c005a:
BasicRejectBody.process(channelId, in, dispatcher);
break;
case 0x003c0064:
BasicRecoverBody.process(channelId, in, dispatcher.getProtocolVersion(), dispatcher);
break;
case 0x003c0065:
dispatcher.receiveBasicRecoverSyncOk(channelId);
break;
case 0x003c0066:
BasicRecoverSyncBody.process(channelId, in, dispatcher);
break;
case 0x003c006e:
BasicRecoverSyncBody.process(channelId, in, dispatcher);
break;
case 0x003c006f:
dispatcher.receiveBasicRecoverSyncOk(channelId);
break;
// TX_CLASS:
case 0x005a000a:
dispatcher.receiveTxSelect(channelId);
break;
case 0x005a000b:
dispatcher.receiveTxSelectOk(channelId);
break;
case 0x005a0014:
dispatcher.receiveTxCommit(channelId);
break;
case 0x005a0015:
dispatcher.receiveTxCommitOk(channelId);
break;
case 0x005a001e:
dispatcher.receiveTxRollback(channelId);
break;
case 0x005a001f:
dispatcher.receiveTxRollbackOk(channelId);
break;
default:
throw newUnknownMethodException(classId, methodId,
dispatcher.getProtocolVersion());
}
}
finally
{
dispatcher.setCurrentMethod(0,0);
}
}
private AMQFrameDecodingException newUnknownMethodException(final int classId,
final int methodId,
ProtocolVersion protocolVersion)
{
return new AMQFrameDecodingException(AMQConstant.COMMAND_INVALID,
"Method "
+ methodId
+ " unknown in AMQP version "
+ protocolVersion
+ " (while trying to decode class "
+ classId
+ " method "
+ methodId
+ ".");
}
}
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