ulxr_connection.h

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/***************************************************************************
           ulxr_connection.h  -  provide a connection for rpc-data
                             -------------------
    begin                : Sun Mar 24 2002
    copyright            : (C) 2002-2007 by Ewald Arnold
    email                : ulxmlrpcpp@ewald-arnold.de

    $Id: ulxr_connection.h 1062 2007-08-19 09:07:58Z ewald-arnold $

 ***************************************************************************/

/**************************************************************************
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2 of the License,
 * or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 ***************************************************************************/

#ifndef ULXR_CONNECTION_H
#define ULXR_CONNECTION_H

#include <ulxmlrpcpp/ulxmlrpcpp.h>  // always first header

#if defined(__BORLANDC__)  || defined (_MSC_VER)
typedef long ssize_t; // TODO detect
#endif

namespace ulxr {

class ULXR_API_DECL0 ConnectorWrapperBase
{
  public:

    virtual ~ConnectorWrapperBase();

    virtual void call() = 0;
};


template <class T>
class ULXR_API_DECL0 ConnectorWrapper : public ConnectorWrapperBase
{
  public:

   typedef void (T::*PMF)();

   virtual void call ()
   {
      (obj->*adr) ();
   }

   ConnectorWrapper(T *o, PMF a)
     : obj(o), adr(a)
   {}

  private:

   T    *obj;
   PMF   adr ;

 private:
    // forbid them all due to internal pointers
    const ConnectorWrapper& operator= (const ConnectorWrapper&);
    ConnectorWrapper (const ConnectorWrapper&);
};


class ULXR_API_DECL0 Connection
{
 public:

   Connection();

   virtual ~Connection();

   virtual void close();

   virtual void shutdown(int mode) = 0;

   virtual Connection *detach() = 0;

   virtual void write(char const *buff, long len);

   virtual ssize_t read(char *buff, long len);

   virtual void open() = 0;

   virtual bool accept(int timeout = 0) = 0;

   virtual bool isOpen() const;

   void setTimeout(unsigned to_sec);

   void setConnectionTimeout(unsigned def_to_sec = 0, unsigned alive_to_sec = 0);

   unsigned getTimeout() const;

   unsigned getDefaultTimeout() const;

   unsigned getPersistentTimeout() const;

   virtual int getLastError();

   virtual CppString getErrorString(int err_number);

   virtual CppString getInterfaceName() = 0;

   virtual void cut();

   int getHandle() const;

    virtual int getServerHandle() = 0;

   void doConnect();

   void setConnector(ConnectorWrapperBase *connector);

 protected:

   void setHandle(int handle);

   bool isConnecting() const;

   void setIsConnecting(bool connecting);

   virtual ssize_t low_level_write(char const *buff, long len);

   virtual ssize_t low_level_read(char *buff, long len);

   virtual bool hasPendingInput() const;

 private:

   void init();

 private:

   bool                   isconnecting;
   ConnectorWrapperBase  *connector;
   int                    fd_handle;

   unsigned               current_to;
   unsigned               default_to;
   unsigned               persist_to;

 private:

    // forbid them all due to internal pointers
//    const ConnectorWrapper& operator= (const ConnectorWrapper&);
//    ConnectorWrapper (const ConnectorWrapper&);
};


}  // namespace ulxr


#endif // ULXR_CONNECTION_H

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