GVOClient.hpp
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/***************************************************************************
* GVOClient.hpp - VO client class *
* ----------------------------------------------------------------------- *
* copyright (C) 2013-2016 by Juergen Knoedlseder *
* ----------------------------------------------------------------------- *
* *
* This program 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, either version 3 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 General Public License *
* along with this program. If not, see <http://www.gnu.org/licenses/>. *
* *
***************************************************************************/
/**
* @file GVOClient.hpp
* @brief VO client class interface definition
* @author Juergen Knoedlseder
*/
#ifndef GVOCLIENT_HPP
#define GVOCLIENT_HPP
/* __ Includes ___________________________________________________________ */
#include <string>
#include "GBase.hpp"
/* __ Forward declarations _______________________________________________ */
class GFitsHDU;
class GXml;
class GXmlNode;
class GVOTable;
/***********************************************************************//**
* @class GVOClient
*
* @brief VO client class
*
* This class implements a client for the Virtual Observatory. Upon
* construction of an instance of the class, the client will search for a
* VO Hub. The has_hub() method signals whether VO Hub information was
* found.
*
* The connect() method will connect the client to the VO Hub. If no VO
* Hub has been found or if the VO Hub that was found is not alive the
* client will start an own VO Hub using the GVOHub class. The
* is_connected() method signals whether the client is connected to a
* Hub.
*
* The disconnect() method disconnects a client from the VO Hub.
***************************************************************************/
class GVOClient : public GBase {
public:
// Constructors and destructors
GVOClient(void);
GVOClient(const GVOClient& client);
virtual ~GVOClient(void);
// Operators
GVOClient& operator=(const GVOClient& client);
// Methods
void clear(void);
GVOClient* clone(void) const;
std::string classname(void) const;
void connect(void);
void disconnect(void);
bool has_hub(void) const;
bool is_connected(void) const;
bool ping_hub(void) const;
void shutdown_hub(void) const;
GXml execute(const std::string& request) const;
void publish(const GFitsHDU& hdu);
void publish(const GVOTable& votable);
std::string print(const GChatter& chatter = NORMAL) const;
protected:
// Protected methods
void init_members(void);
void copy_members(const GVOClient& client);
void free_members(void);
bool find_hub(void);
bool require_hub(void);
void register_to_hub(void);
void unregister_from_hub(void);
void send_metadata(void) const;
// Low-level methods
void connect_to_hub(void) const;
void post_string(const std::string& string) const;
std::string receive_string(void) const;
std::string get_response_value(const GXml& xml, const std::string& name) const;
void get_name_value_pair(const GXmlNode* node, std::string& name, std::string& value) const;
std::string get_hub_lockfile(void) const;
bool response_is_valid(const GXml& xml) const;
int response_error_code(const GXml& xml) const;
std::string response_error_message(const GXml& xml) const;
// Protected data area
std::string m_name; //!< Client name
std::string m_secret; //!< Secret Hub key
std::string m_hub_url; //!< The XML-RPC endpoint for communication with the hub
std::string m_hub_host; //!< Hub host (extracted from XML-RPC endpoint)
std::string m_hub_port; //!< Hub port (extracted from XML-RPC endpoint)
std::string m_hub_path; //!< Hub path (extracted from XML-RPC endpoint)
std::string m_version; //!< The version of the SAMP Standard Profile implemented by the hub
std::string m_client_key; //!< Private client key
std::string m_hub_id; //!< Hub identifier
std::string m_client_id; //!< Client identifier
mutable int m_socket; //!< Hub socket
};
/***********************************************************************//**
* @brief Return class name
*
* @return String containing the class name ("GVOClient").
***************************************************************************/
inline
std::string GVOClient::classname(void) const
{
return ("GVOClient");
}
#endif /* GVOCLIENT_HPP */