| /* |
| * 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.proton.engine.impl; |
| |
| import static org.junit.Assert.assertEquals; |
| |
| import java.nio.ByteBuffer; |
| |
| import org.apache.qpid.proton.amqp.security.SaslFrameBody; |
| import org.apache.qpid.proton.amqp.transport.FrameBody; |
| import org.apache.qpid.proton.codec.AMQPDefinedTypes; |
| import org.apache.qpid.proton.codec.DecoderImpl; |
| import org.apache.qpid.proton.codec.EncoderImpl; |
| import org.apache.qpid.proton.codec.WritableBuffer; |
| |
| /** |
| * Generates frames as per section 2.3.1 of the AMQP spec |
| */ |
| public class AmqpFramer |
| { |
| // My test data is generated by the decoder and encoder from proton-j |
| // although at run-time the Engine internally uses its own implementation. |
| |
| private DecoderImpl _decoder = new DecoderImpl(); |
| private EncoderImpl _encoder = new EncoderImpl(_decoder); |
| |
| public AmqpFramer() |
| { |
| AMQPDefinedTypes.registerAllTypes(_decoder, _encoder); |
| } |
| |
| public byte[] createEmptyFrame(int channel) |
| { |
| byte[] emptyFrame = generateFrame(channel, null); |
| return emptyFrame; |
| } |
| |
| public byte[] generateFrame(int channel, FrameBody frameBody) |
| { |
| byte[] emptyExtendedHeader = new byte[] {}; |
| return generateFrame(channel, emptyExtendedHeader, frameBody); |
| } |
| |
| public byte[] generateFrame(int channel, byte[] extendedHeader, FrameBody frameBody) |
| { |
| return generateFrame(channel, extendedHeader, frameBody, (byte)0); |
| } |
| |
| public byte[] generateSaslFrame(int channel, byte[] extendedHeader, SaslFrameBody frameBody) |
| { |
| return generateFrame(channel, extendedHeader, frameBody, (byte)1); |
| } |
| |
| /** |
| * @param amqpFrameType indicates either AMQP or SASL |
| * @param frameBody is currently expected to be a {@link FrameBody} or a {@link SaslFrameBody} |
| */ |
| public byte[] generateFrame(int channel, byte[] extendedHeader, Object frameBody, byte amqpFrameType) |
| { |
| assertEquals("Extended header must be multiple of 4 bytes", 0, extendedHeader.length % 4); |
| int numberOfExtendedHeaderFourByteWords = extendedHeader.length / 4; |
| |
| ByteBuffer buffer = ByteBuffer.allocate(1024); |
| |
| buffer.position(8); // leave hole for frame header |
| _encoder.setByteBuffer(new WritableBuffer.ByteBufferWrapper(buffer)); |
| |
| // write extended header - maybe empty |
| buffer.put(extendedHeader); |
| // write frame body |
| if (frameBody != null) |
| { |
| _encoder.writeObject(frameBody); |
| } |
| |
| int frameSize = buffer.position(); |
| int framePreambleSizeInFourByteWords = 2; |
| byte dataOffsetFourByteWords = (byte)(framePreambleSizeInFourByteWords + numberOfExtendedHeaderFourByteWords); |
| buffer.rewind(); |
| buffer.putInt(frameSize); |
| buffer.put(dataOffsetFourByteWords); |
| buffer.put(amqpFrameType); |
| buffer.putShort((short)channel); |
| |
| byte[] target = new byte[frameSize]; |
| |
| buffer.rewind(); |
| buffer.get(target, 0, frameSize); |
| return target; |
| } |
| } |