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 #include <boost/serialization/export.hpp>
  30
  31 #include "command_server.hxx"
  32 #include "container.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     // deserialize packet
  43     istringstream ifs(packet);
  44     boost::archive::binary_iarchive ia(ifs);
  45     command_container ccont;
  46
  47     // TODO: catch
  48     ia >> ccont;
  49
  50     // TODO: cast to command subclass (template)
  51     command *cmd=ccont.get_command();
  52
  53     result_container res;
  54
  55     if (cmd)
  56     {
  57         try
  58         {
  59             res.set_result((*cmd)());
  60         }
  61         catch (t2n_exception &e)
  62             { res.set_exception(e.clone()); }
  63         catch (...)
  64             { throw; }
  65     }
  66     else
  67         throw logic_error("uninitialized command called");
  68
  69     ostringstream ofs;
  70     boost::archive::binary_oarchive oa(ofs);
  71
  72     // TODO: catch
  73     oa << res;
  74
  75     conn->write(ofs.str());
  76 }
  77
  78 /** @brief handle incoming commands
  79     @param usec_timeout wait until new data is found, max timeout usecs.
  80             -1: wait endless, 0: no timeout
  81 */
  82 void command_server::handle(long long usec_timeout)
  83 {
  84     if (s.fill_buffer(usec_timeout))
  85     {
  86         string packet;
  87         unsigned int conn_id;
  88
  89         while (s.get_packet(packet,conn_id))
  90             handle_packet(packet,s.get_connection(conn_id));
  91     }
  92     s.cleanup();
  93 }
  94
  95 }