1 /* 2 * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 package sun.management.jdp; 26 27 import java.io.IOException; 28 29 /** 30 * Packet to broadcast 31 * 32 * <p>Each packet have to contain MAGIC and PROTOCOL_VERSION in order to be 33 * recognized as a valid JDP packet.</p> 34 * 35 * <p>Default implementation build packet as a set of UTF-8 encoded Key/Value pairs 36 * are stored as an ordered list of values, and are sent to the server 37 * in that order.</p> 38 * 39 * <p> 40 * Packet structure: 41 * 42 * 4 bytes JDP magic (0xC0FFE42) 43 * 2 bytes JDP protocol version (01) 44 * 45 * 2 bytes size of key 46 * x bytes key (UTF-8 encoded) 47 * 2 bytes size of value 48 * x bytes value (UTF-8 encoded) 49 * 50 * repeat as many times as necessary ... 51 * </p> 52 */ 53 public interface JdpPacket { 54 55 /** 56 * This method responsible to assemble packet and return a byte array 57 * ready to be sent across a Net. 58 * 59 * @return assembled packet as an array of bytes 60 * @throws IOException 61 */ getPacketData()62 public byte[] getPacketData() throws IOException; 63 64 } 65