src/cxx/ApplicationHandler.cxx

   1 /*\r
   2  * ApplicationHandler.cxx\r
   3  *\r
   4  * Copyright 2006,2007 Martin Quinson, Malek Cherier           \r
   5  * All right reserved. \r
   6  *\r
   7  * This program is free software; you can redistribute \r
   8  * it and/or modify it under the terms of the license \r
   9  *(GNU LGPL) which comes with this package. \r
  10  *\r
  11  */\r
  12  \r
  13  /* ApplicationHandler member functions implementation.\r
  14   */  \r
  15 \r
  16 #include <ApplicationHandler.hpp>\r
  17 \r
  18 #include <Object.hpp>\r
  19 #include <ClassNotFoundException.hpp>\r
  20 #include <HostNotFoundException.hpp>\r
  21 #include <Host.hpp>\r
  22 #include <Process.hpp>\r
  23 \r
  24 #include <stdlib.h>\r
  25 \r
  26 #include <surf/surfxml_parse.h>\r
  27 #include <xbt/sysdep.h>\r
  28 \r
  29 \r
  30 namespace SimGrid\r
  31 {\r
  32         namespace Msg\r
  33         {\r
  34 \r
  35                 ApplicationHandler::ProcessFactory* ApplicationHandler::processFactory = NULL;\r
  36                         \r
  37                 // Desable the default constructor, the copy constructor , the assignement operator\r
  38                 // and the destructor of this class. Assume that this class is static.\r
  39                 \r
  40                 // Default constructor.\r
  41                 ApplicationHandler::ApplicationHandler()\r
  42                 {\r
  43                         // NOTHING TODO\r
  44                 }\r
  45                 \r
  46                 // Copy constructor.\r
  47                 ApplicationHandler::ApplicationHandler(const ApplicationHandler& rApplicationHandler)\r
  48                 {\r
  49                         // NOTHING TODO\r
  50                 }\r
  51                 \r
  52                 // Destructor\r
  53                 ApplicationHandler::~ApplicationHandler()\r
  54                 {\r
  55                         // NOTHING TODO\r
  56                 }\r
  57                 \r
  58                 // Assignement operator.\r
  59                 const ApplicationHandler& ApplicationHandler::operator = (const ApplicationHandler& rApplicationHandler)\r
  60                 {\r
  61                         return *this;\r
  62                 }\r
  63                 \r
  64                 void ApplicationHandler::onStartDocument(void)\r
  65                 {\r
  66                         // instanciate the factory at the begining of the parsing\r
  67                         processFactory = new ProcessFactory();  \r
  68                 }\r
  69                 \r
  70                 void ApplicationHandler::onEndDocument(void)\r
  71                 {\r
  72                         // release the handler at the end of the parsing.\r
  73                         if(processFactory)\r
  74                                 delete processFactory;\r
  75                 }\r
  76                         \r
  77                 void ApplicationHandler::onBeginProcess(void)\r
  78                 {\r
  79                         // set the process identity at the begin of the xml process element.\r
  80                         processFactory->setProcessIdentity(A_surfxml_process_host, A_surfxml_process_function);\r
  81                 }               \r
  82                 \r
  83                 void ApplicationHandler::onProcessArg(void)\r
  84                 {\r
  85                         // register the argument of the current xml process element.\r
  86                         processFactory->registerProcessArg(A_surfxml_argument_value);\r
  87                 }\r
  88                 \r
  89                 void ApplicationHandler::OnProperty(void)\r
  90                 {\r
  91                         // set the property of the current xml process element.\r
  92                          processFactory->setProperty(A_surfxml_prop_id, A_surfxml_prop_value);\r
  93                 }\r
  94                 \r
  95                 void ApplicationHandler::onEndProcess(void)\r
  96                 {\r
  97                         // at the end of the xml process element create the wrapper process (of the native Msg process)\r
  98                         processFactory->createProcess();\r
  99                 }\r
 100                 \r
 101                 /////////////////////////////////////////////////////////////////////////////////////////////////\r
 102                 // Process factory connected member functions\r
 103                 \r
 104                 ApplicationHandler::ProcessFactory::ProcessFactory() \r
 105                 {\r
 106                         this->args = xbt_dynar_new(sizeof(char*),ApplicationHandler::ProcessFactory::freeCstr);\r
 107                         this->properties = NULL; // TODO instanciate the dictionary\r
 108                         this->hostName = NULL;\r
 109                         this->function = NULL;\r
 110                 }      \r
 111                 \r
 112                 // create the cxx process wrapper.\r
 113                 void ApplicationHandler::ProcessFactory::createProcess() \r
 114                 throw (ClassNotFoundException, HostNotFoundException)\r
 115                 {\r
 116                         Host host;\r
 117                         Class* c;\r
 118                         Process* process;\r
 119                         \r
 120                         // try to dynamicaly create an instance fo the process from its name (which is specified by the element function\r
 121                         // in the xml application file.\r
 122                         // if this static method fails, it throws an exception of the class ClassNotFoundException\r
 123                         c = Class::fromName(this->function);\r
 124                         process = reinterpret_cast<Process*>(c->createObject());\r
 125                         \r
 126                         // try to retrieve the host of the process from its name\r
 127                         // if this method fails, it throws an exception of the class HostNotFoundException\r
 128                         host = Host::getByName(this->hostName); \r
 129                         \r
 130                         // build the list of the arguments of the newly created process.\r
 131                         int argc = xbt_dynar_length(this->args);\r
 132                         \r
 133                         char** argv = (char**)calloc(argc, sizeof(char*));\r
 134                         \r
 135                         for(int i = argc -1; i >= 0; i--)\r
 136                                 xbt_dynar_pop(this->args, &(argv[i]));\r
 137                         \r
 138                         // finaly create the process (for more detail on the process creation see Process::create()\r
 139                         process->create(host, this->function , argc, argv);\r
 140                         \r
 141                         // TODO add the properties of the process\r
 142                         /*process->properties = this->properties;\r
 143                         this->properties = new Properties();*/\r
 144                 }\r
 145                         \r
 146                 void ApplicationHandler::ProcessFactory::setProcessIdentity(const char* hostName, const char* function) \r
 147                 {\r
 148                         this->hostName = hostName;\r
 149                         this->function = function;\r
 150                 \r
 151                         /*if (!this->args->empty())\r
 152                                 this->args->clear();\r
 153                 \r
 154                         if(!this->properties->empty())\r
 155                                 this->properties->clear();*/\r
 156                 }\r
 157                 \r
 158                 // callback function used by the dynamic array to cleanup all of its elements.\r
 159                 void ApplicationHandler::ProcessFactory::freeCstr(void* cstr)\r
 160                 {\r
 161                         free(*(void**)cstr);\r
 162                 }\r
 163                 \r
 164                 void ApplicationHandler::ProcessFactory::registerProcessArg(const char* arg) \r
 165                 {\r
 166                         char* cstr = _strdup(arg);\r
 167                         xbt_dynar_push(this->args, &cstr);\r
 168                 }\r
 169                 \r
 170                 void ApplicationHandler::ProcessFactory::setProperty(const char* id, const char* value)\r
 171                 {\r
 172                         // TODO implement this function;        \r
 173                 }\r
 174                 \r
 175                 const char* ApplicationHandler::ProcessFactory::getHostName(void)\r
 176                 {\r
 177                         return this->hostName;\r
 178                 }\r
 179 \r
 180         } // namespace Msg\r
 181 } // namespace SimGrid