samples/ipc/baseserver.cpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        samples/ipc/baseserver.cpp
   3 // Purpose:     IPC sample: console server
   4 // Author:      Anders Larsen
   5 //              Most of the code was stolen from: samples/ipc/server.cpp
   6 //              (c) Julian Smart, Jurgen Doornik
   7 // Created:     2007-11-08
   8 // RCS-ID:      $Id$
   9 // Copyright:   (c) 2007 Anders Larsen
  10 // License:     wxWindows licence
  11 ///////////////////////////////////////////////////////////////////////////////
  12
  13 // ============================================================================
  14 // declarations
  15 // ============================================================================
  16
  17 // ----------------------------------------------------------------------------
  18 // headers
  19 // ----------------------------------------------------------------------------
  20
  21 // For compilers that support precompilation, includes "wx.h".
  22 #include "wx/wxprec.h"
  23
  24 #ifdef __BORLANDC__
  25     #pragma hdrstop
  26 #endif
  27
  28 #ifndef WX_PRECOMP
  29     #include "wx/wx.h"
  30 #endif
  31
  32 // Settings common to both executables: determines whether
  33 // we're using TCP/IP or real DDE.
  34 #include "ipcsetup.h"
  35
  36 #include "connection.h"
  37
  38 #include "wx/timer.h"
  39 #include "wx/datetime.h"
  40
  41 // ----------------------------------------------------------------------------
  42 // wxWin macros
  43 // ----------------------------------------------------------------------------
  44
  45 // Define a new application
  46 class MyServer;
  47
  48 class MyApp : public wxApp
  49 {
  50 public:
  51     virtual bool OnInit();
  52     virtual int OnExit();
  53
  54 protected:
  55     MyServer       *m_server;
  56 };
  57
  58 DECLARE_APP(MyApp)
  59
  60 class MyConnection : public MyConnectionBase, public wxTimer
  61 {
  62 public:
  63     virtual bool Disconnect() { return wxConnection::Disconnect(); }
  64     virtual bool OnExecute(const wxString& topic, const void *data, size_t size, wxIPCFormat format);
  65     virtual const void *OnRequest(const wxString& topic, const wxString& item, size_t *size, wxIPCFormat format);
  66     virtual bool OnPoke(const wxString& topic, const wxString& item, const void *data, size_t size, wxIPCFormat format);
  67     virtual bool OnStartAdvise(const wxString& topic, const wxString& item);
  68     virtual bool OnStopAdvise(const wxString& topic, const wxString& item);
  69     virtual bool DoAdvise(const wxString& item, const void *data, size_t size, wxIPCFormat format);
  70     virtual bool OnDisconnect();
  71     virtual void Notify();
  72
  73     wxString        m_sAdvise;
  74
  75 protected:
  76     wxString        m_sRequestDate;
  77     char            m_achRequestBytes[3];
  78 };
  79
  80 class MyServer: public wxServer
  81 {
  82 public:
  83     MyServer();
  84     virtual ~MyServer();
  85     void Disconnect();
  86     bool IsConnected() { return m_connection != NULL; };
  87     MyConnection *GetConnection() { return m_connection; };
  88     wxConnectionBase *OnAcceptConnection(const wxString& topic);
  89
  90 protected:
  91     MyConnection     *m_connection;
  92 };
  93
  94 // ============================================================================
  95 // implementation
  96 // ============================================================================
  97
  98 IMPLEMENT_APP(MyApp)
  99
 100 // ----------------------------------------------------------------------------
 101 // MyApp
 102 // ----------------------------------------------------------------------------
 103
 104 bool MyApp::OnInit()
 105 {
 106     if ( !wxApp::OnInit() )
 107         return false;
 108
 109     delete wxLog::SetActiveTarget(new wxLogStderr);
 110
 111     // Create a new server
 112     m_server = new MyServer;
 113     if (m_server->Create("4242"))
 114     {
 115         wxLogMessage(_T("Server 4242 started"));
 116 #if wxUSE_DDE_FOR_IPC
 117         wxLogMessage(_T("Server uses DDE"));
 118 #else // !wxUSE_DDE_FOR_IPC
 119         wxLogMessage(_T("Server uses TCP"));
 120 #endif // wxUSE_DDE_FOR_IPC/!wxUSE_DDE_FOR_IPC
 121         return true;
 122     }
 123     else
 124     {
 125         wxLogMessage(_T("Server 4242 failed to start"));
 126         delete m_server;
 127         return false;
 128     }
 129 }
 130
 131 int MyApp::OnExit()
 132 {
 133     return 0;
 134 }
 135
 136 // ----------------------------------------------------------------------------
 137 // MyServer
 138 // ----------------------------------------------------------------------------
 139
 140 MyServer::MyServer()
 141 {
 142     m_connection = NULL;
 143 }
 144
 145 MyServer::~MyServer()
 146 {
 147     Disconnect();
 148 }
 149
 150 wxConnectionBase *MyServer::OnAcceptConnection(const wxString& topic)
 151 {
 152     wxLogMessage(_T("OnAcceptConnection(\"%s\")"), topic.c_str());
 153
 154     if ( topic == IPC_TOPIC )
 155     {
 156         m_connection = new MyConnection;
 157         wxLogMessage(_T("Connection accepted"));
 158         return m_connection;
 159     }
 160     // unknown topic
 161     return NULL;
 162 }
 163
 164 void MyServer::Disconnect()
 165 {
 166     if (m_connection)
 167     {
 168         m_connection->Disconnect();
 169         delete m_connection;
 170         m_connection = NULL;
 171         wxLogMessage(_T("Disconnected client"));
 172     }
 173 }
 174
 175 // ----------------------------------------------------------------------------
 176 // MyConnection
 177 // ----------------------------------------------------------------------------
 178
 179 bool MyConnection::OnExecute(const wxString& topic,
 180     const void *data, size_t size, wxIPCFormat format)
 181 {
 182     Log(_T("OnExecute"), topic, _T(""), data, size, format);
 183     return true;
 184 }
 185
 186 bool MyConnection::OnPoke(const wxString& topic,
 187     const wxString& item, const void *data, size_t size, wxIPCFormat format)
 188 {
 189     Log(_T("OnPoke"), topic, item, data, size, format);
 190     return wxConnection::OnPoke(topic, item, data, size, format);
 191 }
 192
 193 const void *MyConnection::OnRequest(const wxString& topic,
 194     const wxString& item, size_t *size, wxIPCFormat format)
 195 {
 196     const void *data;
 197     if (item == _T("Date"))
 198     {
 199         m_sRequestDate = wxDateTime::Now().Format();
 200         data = m_sRequestDate.c_str();
 201         *size = wxNO_LEN;
 202     }
 203     else if (item == _T("Date+len"))
 204     {
 205         m_sRequestDate = wxDateTime::Now().FormatTime() + _T(" ") + wxDateTime::Now().FormatDate();
 206         data = m_sRequestDate.c_str();
 207         *size = m_sRequestDate.Length() + 1;
 208     }
 209     else if (item == _T("bytes[3]"))
 210     {
 211         data = m_achRequestBytes;
 212         m_achRequestBytes[0] = '1'; m_achRequestBytes[1] = '2'; m_achRequestBytes[2] = '3';
 213         *size = 3;
 214     }
 215     else
 216     {
 217         data = NULL;
 218         *size = 0;
 219     }
 220     Log(_T("OnRequest"), topic, item, data, *size, format);
 221     return data;
 222 }
 223
 224 bool MyConnection::OnStartAdvise(const wxString& topic,
 225                                  const wxString& item)
 226 {
 227     wxLogMessage(_T("OnStartAdvise(\"%s\",\"%s\")"), topic.c_str(), item.c_str());
 228     wxLogMessage(_T("Returning true"));
 229     m_sAdvise = item;
 230     Start(3000, false);
 231     return true;
 232 }
 233
 234 bool MyConnection::OnStopAdvise(const wxString& topic,
 235                                  const wxString& item)
 236 {
 237     wxLogMessage(_T("OnStopAdvise(\"%s\",\"%s\")"), topic.c_str(), item.c_str());
 238     wxLogMessage(_T("Returning true"));
 239     m_sAdvise.Empty();
 240     Stop();
 241     return true;
 242 }
 243
 244 void MyConnection::Notify()
 245 {
 246     if (!m_sAdvise.IsEmpty())
 247     {
 248         wxString s = wxDateTime::Now().Format();
 249         Advise(m_sAdvise, s);
 250         s = wxDateTime::Now().FormatTime() + _T(" ") + wxDateTime::Now().FormatDate();
 251         Advise(m_sAdvise, (const char *)s.c_str(), s.Length() + 1);
 252
 253 #if wxUSE_DDE_FOR_IPC
 254         wxLogMessage(_T("DDE Advise type argument cannot be wxIPC_PRIVATE. The client will receive it as wxIPC_TEXT, and receive the correct no of bytes, but not print a correct log entry."));
 255 #endif
 256         char bytes[3];
 257         bytes[0] = '1'; bytes[1] = '2'; bytes[2] = '3';
 258         Advise(m_sAdvise, bytes, 3, wxIPC_PRIVATE);
 259         // this works, but the log treats it as a string now
 260 //        m_connection->Advise(m_connection->m_sAdvise, bytes, 3, wxIPC_TEXT );
 261     }
 262 }
 263
 264 bool MyConnection::DoAdvise(const wxString& item, const void *data, size_t size, wxIPCFormat format)
 265 {
 266     Log(_T("Advise"), _T(""), item, data, size, format);
 267     return wxConnection::DoAdvise(item, data, size, format);
 268 }
 269
 270 bool MyConnection::OnDisconnect()
 271 {
 272     wxLogMessage(_T("OnDisconnect()"));
 273     return true;
 274 }