daemon_application.h

/*
 * daemon_application.h
 * This file is part of dbPager Classes Library (DCL)
 *
 * Copyright (c) 2008 Dennis Prochko <wolfsoft@mail.ru>
 *
 * DCL is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation version 3.
 *
 * DCL 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 General Public License
 * along with DCL; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor,
 * Boston, MA  02110-1301  USA
 */

#ifndef _DAEMON_APPLICATION_H_
#define _DAEMON_APPLICATION_H_

#include <string>

#include <dcl/application.h>

namespace dbp {


namespace log_level {
        enum log_level {
                error,
                warning,
                info
        };
}


class daemon_application_int: public application_int {
public:
        typedef delegate0<void> on_reload_configuration_handler;
        typedef delegate0<void> on_pause_handler;
        typedef delegate0<void> on_resume_handler;
        typedef delegate0<void> on_terminate_handler;

        virtual void log(const std::string &message,
          log_level::log_level level = log_level::info) = 0;

        virtual void on_reload_configuration(on_reload_configuration_handler handler) = 0;

        virtual void on_pause(on_pause_handler handler) = 0;

        virtual void on_resume(on_resume_handler handler) = 0;

        virtual void on_terminate(on_terminate_handler handler) = 0;
};


class daemon_application: public daemon_application_int,
  public singleton<daemon_application> {
        friend class singleton<daemon_application>;
public:
        virtual void set_name(const std::string &name) {
                pimpl->set_name(name);
        };
        virtual void set_description(const std::string &description) {
                pimpl->set_description(description);
        };
        virtual void register_cmdline_parameter(const cmdline_parameter &param,
          cmdline_parameter_handler handler) {
                pimpl->register_cmdline_parameter(param, handler);
        };
        virtual void on_execute(on_execute_handler handler) {
                pimpl->on_execute(handler);
        };
        virtual void on_exception(on_exception_handler handler) {
                pimpl->on_exception(handler);
        };
        virtual int run(int argc, char *argv[]) {
                return pimpl->run(argc, argv);
        };
        virtual void log(const std::string &message,
          log_level::log_level level = log_level::info) {
                pimpl->log(message, level);
        };
        virtual void on_reload_configuration(on_reload_configuration_handler handler) {
                pimpl->on_reload_configuration(handler);
        };
        virtual void on_pause(on_pause_handler handler) {
                pimpl->on_pause(handler);
        };
        virtual void on_resume(on_resume_handler handler) {
                pimpl->on_resume(handler);
        };
        virtual void on_terminate(on_terminate_handler handler) {
                pimpl->on_terminate(handler);
        };
protected:
        daemon_application();
private:
        daemon_application_int *pimpl;
};
/*
class logstream: public std::ostream
{
  friend class thread_local;
  class logstreambuf: public  std::streambuf
  {
    std::vector<char> buffer_;
  public:
    logstreambuf();
    ~logstreambuf();
    virtual std::streamsize xsputn(const char* p, std::streamsize n);
    virtual int sync();
    virtual int overflow(int);
  private:
    char* begin();
    char* end();
  };
  logstreambuf streambuf_;
private:
  logstream();
  virtual ~logstream();
};
*/
} // namespace

#endif /*_DAEMON_APPLICATION_H_*/