developer.intra2net.com Git - libt2n/blob - src/command_server.cpp

   1 /***************************************************************************
   2  *   Copyright (C) 2006 by Gerd v. Egidy                                   *
   3  *   gve@intra2net.com                                                     *
   4  *                                                                         *
   5  *   This library is free software; you can redistribute it and/or modify  *
   6  *   it under the terms of the GNU Lesser General Public License version   *
   7  *   2.1 as published by the Free Software Foundation.                     *
   8  *                                                                         *
   9  *   This library is distributed in the hope that it will be useful,       *
  10  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  11  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  12  *   GNU Lesser General Public License for more details.                   *
  13  *                                                                         *
  14  *   You should have received a copy of the GNU Lesser General Public      *
  15  *   License along with this program; if not, write to the                 *
  16  *   Free Software Foundation, Inc.,                                       *
  17  *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
  18  ***************************************************************************/
  19
  20 #include <string>
  21 #include <sstream>
  22 #include <stdexcept>
  23
  24 #include <boost/archive/binary_oarchive.hpp>
  25 #include <boost/archive/binary_iarchive.hpp>
  26 #include <boost/archive/xml_oarchive.hpp>
  27 #include <boost/archive/xml_iarchive.hpp>
  28 #include <boost/serialization/serialization.hpp>
  29
  30 #include "command_server.hxx"
  31 #include "container.hxx"
  32 #include "log.hxx"
  33
  34 using namespace std;
  35
  36 namespace libt2n
  37 {
  38
  39 /// handle a command including deserialization and answering
  40 void command_server::handle_packet(const std::string& packet, server_connection* conn)
  41 {
  42     OBJLOGSTREAM(s,debug,"handling packet from connection " << conn->get_id());
  43
  44     // deserialize packet
  45     istringstream ifs(packet);
  46     boost::archive::binary_iarchive ia(ifs);
  47     command_container ccont;
  48
  49     // TODO: catch
  50     ia >> ccont;
  51
  52     std::ostream* ostr;
  53     if ((ostr=s.get_logstream(fulldebug))!=NULL)
  54     {
  55         (*ostr) << "decoded packet data: " << std::endl;
  56         boost::archive::xml_oarchive xo(*ostr);
  57         xo << BOOST_SERIALIZATION_NVP(ccont);
  58     }
  59
  60     // TODO: cast to command subclass (template)
  61     command *cmd=ccont.get_command();
  62
  63     result_container res;
  64
  65     if (cmd)
  66     {
  67         try
  68         {
  69             res.set_result((*cmd)());
  70         }
  71         catch (t2n_exception &e)
  72             { res.set_exception(e.clone()); }
  73         catch (...)
  74             { throw; }
  75     }
  76     else
  77         throw logic_error("uninitialized command called");
  78
  79     ostringstream ofs;
  80     boost::archive::binary_oarchive oa(ofs);
  81
  82     // TODO: catch
  83     oa << res;
  84
  85     if ((ostr=s.get_logstream(fulldebug))!=NULL)
  86     {
  87         (*ostr) << "returning result, decoded data: " << std::endl;
  88         boost::archive::xml_oarchive xo(*ostr);
  89         xo << BOOST_SERIALIZATION_NVP(res);
  90     }
  91
  92     conn->write(ofs.str());
  93 }
  94
  95 /** @brief handle incoming commands
  96     @param usec_timeout wait until new data is found, max timeout usecs.
  97             -1: wait endless, 0: no timeout
  98 */
  99 void command_server::handle(long long usec_timeout)
 100 {
 101     if (s.fill_buffer(usec_timeout))
 102     {
 103         string packet;
 104         unsigned int conn_id;
 105
 106         while (s.get_packet(packet,conn_id))
 107             handle_packet(packet,s.get_connection(conn_id));
 108     }
 109     s.cleanup();
 110 }
 111
 112 }