| /** |
| * 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.activemq.transport.amqp; |
| |
| import org.fusesource.hawtbuf.Buffer; |
| |
| /** |
| * Represents the AMQP protocol handshake packet that is sent during the |
| * initial exchange with a remote peer. |
| */ |
| public class AmqpHeader { |
| |
| static final Buffer PREFIX = new Buffer(new byte[] { 'A', 'M', 'Q', 'P' }); |
| |
| private Buffer buffer; |
| |
| public AmqpHeader() { |
| this(new Buffer(new byte[] { 'A', 'M', 'Q', 'P', 0, 1, 0, 0 })); |
| } |
| |
| public AmqpHeader(Buffer buffer) { |
| this(buffer, true); |
| } |
| |
| public AmqpHeader(Buffer buffer, boolean validate) { |
| setBuffer(buffer, validate); |
| } |
| |
| public int getProtocolId() { |
| return buffer.get(4) & 0xFF; |
| } |
| |
| public void setProtocolId(int value) { |
| buffer.data[buffer.offset + 4] = (byte) value; |
| } |
| |
| public int getMajor() { |
| return buffer.get(5) & 0xFF; |
| } |
| |
| public void setMajor(int value) { |
| buffer.data[buffer.offset + 5] = (byte) value; |
| } |
| |
| public int getMinor() { |
| return buffer.get(6) & 0xFF; |
| } |
| |
| public void setMinor(int value) { |
| buffer.data[buffer.offset + 6] = (byte) value; |
| } |
| |
| public int getRevision() { |
| return buffer.get(7) & 0xFF; |
| } |
| |
| public void setRevision(int value) { |
| buffer.data[buffer.offset + 7] = (byte) value; |
| } |
| |
| public Buffer getBuffer() { |
| return buffer; |
| } |
| |
| public void setBuffer(Buffer value) { |
| setBuffer(value, true); |
| } |
| |
| public void setBuffer(Buffer value, boolean validate) { |
| if (validate && !value.startsWith(PREFIX) || value.length() != 8) { |
| throw new IllegalArgumentException("Not an AMQP header buffer"); |
| } |
| buffer = value.buffer(); |
| } |
| |
| public boolean hasValidPrefix() { |
| return buffer.startsWith(PREFIX); |
| } |
| |
| @Override |
| public String toString() { |
| StringBuilder builder = new StringBuilder(); |
| for (int i = 0; i < buffer.length(); ++i) { |
| char value = (char) buffer.get(i); |
| if (Character.isLetter(value)) { |
| builder.append(value); |
| } else { |
| builder.append(","); |
| builder.append((int) value); |
| } |
| } |
| return builder.toString(); |
| } |
| } |