00001 /******************************************************************************* 00002 00003 @file RollCall.d 00004 00005 Copyright (c) 2004 Kris Bell 00006 00007 This software is provided 'as-is', without any express or implied 00008 warranty. In no event will the authors be held liable for damages 00009 of any kind arising from the use of this software. 00010 00011 Permission is hereby granted to anyone to use this software for any 00012 purpose, including commercial applications, and to alter it and/or 00013 redistribute it freely, subject to the following restrictions: 00014 00015 1. The origin of this software must not be misrepresented; you must 00016 not claim that you wrote the original software. If you use this 00017 software in a product, an acknowledgment within documentation of 00018 said product would be appreciated but is not required. 00019 00020 2. Altered source versions must be plainly marked as such, and must 00021 not be misrepresented as being the original software. 00022 00023 3. This notice may not be removed or altered from any distribution 00024 of the source. 00025 00026 4. Derivative works are permitted, but they must carry this notice 00027 in full and credit the original source. 00028 00029 00030 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 00031 00032 00033 @version Initial version, July 2004 00034 @author Kris 00035 00036 00037 *******************************************************************************/ 00038 00039 module mango.cluster.qos.socket.RollCall; 00040 00041 private import mango.cache.Payload; 00042 00043 /****************************************************************************** 00044 00045 An IPayload used by the cluster client and server during discovery 00046 lookup and liveness broadcasts. The client broadcasts one of these 00047 at startup to see which servers are alive. The server responds with 00048 a reply RollCall stating its name and port. The server will also 00049 broadcast one of these when it first starts, such that any running 00050 clients can tell the server has 'recovered'. 00051 00052 ******************************************************************************/ 00053 00054 class RollCall : Payload 00055 { 00056 char[] name; 00057 int port1, 00058 port2; 00059 bool request; 00060 00061 private import mango.io.PickleRegistry; 00062 00063 /*********************************************************************** 00064 00065 Register this class for pickling, so we can resurrect 00066 instances when they arrive on a network datagram. 00067 00068 ***********************************************************************/ 00069 00070 static this () 00071 { 00072 PickleRegistry.enroll (new RollCall); 00073 } 00074 00075 /********************************************************************** 00076 00077 **********************************************************************/ 00078 00079 this () 00080 { 00081 } 00082 00083 /********************************************************************** 00084 00085 **********************************************************************/ 00086 00087 this (char[] name, ushort port1, ushort port2, bool request = false) 00088 { 00089 this.name = name; 00090 this.port1 = port1; 00091 this.port2 = port2; 00092 this.request = request; 00093 } 00094 00095 /********************************************************************** 00096 00097 **********************************************************************/ 00098 00099 void read (IReader reader) 00100 { 00101 super.read (reader); 00102 reader.get (name) 00103 .get (port1) 00104 .get (port2) 00105 .get (request); 00106 } 00107 00108 /********************************************************************** 00109 00110 **********************************************************************/ 00111 00112 void write (IWriter writer) 00113 { 00114 super.write (writer); 00115 writer.put (name) 00116 .put (port1) 00117 .put (port2) 00118 .put (request); 00119 } 00120 00121 /********************************************************************** 00122 00123 **********************************************************************/ 00124 00125 override Payload create () 00126 { 00127 return new RollCall; 00128 } 00129 00130 /********************************************************************** 00131 00132 **********************************************************************/ 00133 00134 override char[] getGuid () 00135 { 00136 return this.classinfo.name; 00137 } 00138 } 00139 00140