examples/metronome/metronome_server.cpp

   1 /*
   2  * Copyright (c) 2011 Samsung Electronics Co., Ltd All Rights Reserved
   3  *
   4  *    Licensed under the Apache License, Version 2.0 (the "License");
   5  *    you may not use this file except in compliance with the License.
   6  *    You may obtain a copy of the License at
   7  *
   8  *        http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  *    Unless required by applicable law or agreed to in writing, software
  11  *    distributed under the License is distributed on an "AS IS" BASIS,
  12  *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  *    See the License for the specific language governing permissions and
  14  *    limitations under the License.
  15  */
  16 /*
  17  * @file        metronome_server.cpp
  18  * @author      Przemyslaw Dobrowolski (p.dobrowolsk@samsung.com)
  19  * @version     1.0
  20  * @brief       This file is the implementation file of metronome server example
  21  */
  22 #include <dpl/tcp_socket_rpc_server.h>
  23 #include <dpl/tcp_socket_rpc_connection.h>
  24 #include <dpl/controller.h>
  25 #include <dpl/application.h>
  26 #include <dpl/type_list.h>
  27 #include <dpl/log/log.h>
  28 #include <algorithm>
  29 #include <list>
  30 #include <dpl/assert.h>
  31
  32 // Metronome signal event
  33 DECLARE_GENERIC_EVENT_0(SignalEvent)
  34 DECLARE_GENERIC_EVENT_1(DeleteConnectionEvent, DPL::AbstractRPCConnection *)
  35
  36 // Heart beat interval
  37 const double HEART_BEAT_INTERVAL = 1.0; // seconds
  38
  39 class MetronomeServerApplication
  40     : public DPL::Application,
  41       private DPL::Controller<DPL::TypeListDecl<SignalEvent,
  42                                                 DeleteConnectionEvent>::Type>,
  43       private DPL::EventListener<DPL::AbstractRPCConnectionEvents::ConnectionClosedEvent>,
  44       private DPL::EventListener<DPL::AbstractRPCConnectionEvents::ConnectionBrokenEvent>,
  45       private DPL::EventListener<DPL::AbstractRPCConnectorEvents::ConnectionEstablishedEvent>
  46 {
  47 private:
  48     DPL::TcpSocketRPCServer m_rpcServer;
  49
  50     typedef std::list<DPL::AbstractRPCConnection *> ConnectionList;
  51     ConnectionList m_connections;
  52
  53     // Matronome signal received
  54     virtual void OnEventReceived(const SignalEvent &event)
  55     {
  56         (void)event;
  57
  58         // Signal all conection about heart beat
  59         DPL::RPCFunction proc;
  60         proc.AppendArg((int)0);
  61
  62         for (ConnectionList::iterator it = m_connections.begin(); it != m_connections.end(); ++it)
  63             (*it)->AsyncCall(proc);
  64
  65         // Continue to emot heart beats
  66         DPL::ControllerEventHandler<SignalEvent>::PostTimedEvent(SignalEvent(), HEART_BEAT_INTERVAL);
  67     }
  68
  69     virtual void OnEventReceived(const DeleteConnectionEvent &event)
  70     {
  71         delete event.GetArg0();
  72     }
  73
  74     void RemoveConnection(DPL::AbstractRPCConnection *connection)
  75     {
  76         // Find connection
  77         ConnectionList::iterator it = std::find(m_connections.begin(), m_connections.end(), connection);
  78         Assert(it != m_connections.end());
  79
  80         // Erase connection
  81         m_connections.erase(it);
  82
  83         // Detach RPC connection listeners
  84         connection->DPL::EventSupport<DPL::AbstractRPCConnectionEvents::ConnectionClosedEvent>::RemoveListener(this);
  85         connection->DPL::EventSupport<DPL::AbstractRPCConnectionEvents::ConnectionBrokenEvent>::RemoveListener(this);
  86
  87         // Delete connection
  88         DPL::ControllerEventHandler<DeleteConnectionEvent>::PostEvent(DeleteConnectionEvent(connection));
  89     }
  90
  91     void AddConnection(DPL::AbstractRPCConnection *connection)
  92     {
  93         // Add connection
  94         m_connections.push_back(connection);
  95
  96         // Attach event listeners
  97         connection->DPL::EventSupport<DPL::AbstractRPCConnectionEvents::ConnectionClosedEvent>::AddListener(this);
  98         connection->DPL::EventSupport<DPL::AbstractRPCConnectionEvents::ConnectionBrokenEvent>::AddListener(this);
  99     }
 100
 101     virtual void OnEventReceived(const DPL::AbstractRPCConnectionEvents::ConnectionClosedEvent &event)
 102     {
 103         (void)event;
 104
 105         LogInfo("Connection closed");
 106
 107         // Remove connection from list
 108         RemoveConnection(static_cast<DPL::AbstractRPCConnection *>(event.GetSender()));
 109     }
 110
 111     virtual void OnEventReceived(const DPL::AbstractRPCConnectionEvents::ConnectionBrokenEvent &event)
 112     {
 113         (void)event;
 114
 115         LogInfo("Connection broken");
 116
 117         // Remove connection from list
 118         RemoveConnection(static_cast<DPL::AbstractRPCConnection *>(event.GetSender()));
 119     }
 120
 121     virtual void OnEventReceived(const DPL::AbstractRPCConnectorEvents::ConnectionEstablishedEvent &event)
 122     {
 123         // Save connection pointer
 124         LogInfo("New connection");
 125
 126         // Add nre connection to list
 127         AddConnection(event.GetArg1());
 128     }
 129
 130 public:
 131     MetronomeServerApplication(int argc, char **argv)
 132         : Application(argc, argv, "rpc")
 133     {
 134         // Attach RPC server listeners
 135         m_rpcServer.DPL::EventSupport<DPL::AbstractRPCConnectorEvents::ConnectionEstablishedEvent>::AddListener(this);
 136
 137         // Inherit calling context
 138         Touch();
 139
 140         // Open RPC server
 141         m_rpcServer.Open(12345);
 142
 143         // Start heart beat
 144         DPL::ControllerEventHandler<SignalEvent>::PostTimedEvent(SignalEvent(), HEART_BEAT_INTERVAL);
 145
 146         // Started
 147         LogInfo("Metronome server started");
 148      }
 149
 150     virtual ~MetronomeServerApplication()
 151     {
 152         // Delete all RPC connections
 153         while (!m_connections.empty())
 154             RemoveConnection(m_connections.front());
 155
 156         // Close RPC server
 157         m_rpcServer.CloseAll();
 158
 159         // Detach RPC server listener
 160         m_rpcServer.DPL::EventSupport<DPL::AbstractRPCConnectorEvents::ConnectionEstablishedEvent>::RemoveListener(this);
 161     }
 162 };
 163
 164 int main(int argc, char *argv[])
 165 {
 166     return MetronomeServerApplication(argc, argv).Exec();
 167 }