Added API to python in order to load reactors/plugins on the fly

method add_to_agent receives an xml tag that is parsed the same way as
what is done in the Agent constructor allowing to add new reactors,
plugins or goals on the fly based on XML

NOTE: this need to be tested in multithreaded setup

Author: fredpy

trex/agent/Agent.cc

@@ -672,6 +672,16 @@ void Agent::subConf(boost::property_tree::ptree &conf,
   sendRequests(conf);
 }
 
+void Agent::add_to_agent(boost::property_tree::ptree::value_type &config) {
+  if( !config.second.empty() ) {
+    // TODO: may need to make it hread safe
+    syslog(null, info)<<"Modifying agent based on additional XML";
+    subConf(config.second, "");
+    syslog(null, info)<<"End of modification";
+  }
+}
+
+
 void Agent::loadConf(boost::property_tree::ptree::value_type &config) {
   if( !is_tag(config, "Agent") )
     throw XmlError(config, "Not an Agent node");

trex/agent/Agent.hh

@@ -247,6 +247,8 @@ namespace TREX {
         return m_clock;
       }
 
+      void add_to_agent(boost::property_tree::ptree::value_type &config);
+      
       /** @brief run the agent
        *
        * This method runs the agent until its completes. It is just a

trex/python/agent_decls.cc

@@ -202,6 +202,10 @@ void export_agent() {
        "complete agent initialization.\n\n"
        "Raises:\n"
        "  agent_exception: something went wrong during initialization.")
+  .def("add_to_agent", &ta::Agent::add_to_agent, args("self", "xml"),
+       " add new components to the agent.\n"
+       "Raises:\n"
+       "  agent_exception: something went wrong during initialization.")
   .def("run", &ta::Agent::run, arg("self"),
        "run the agent until completion.\n\n"
        "Note: run calls initialize on its own so you do not need to\n\n"