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Moved several files from pglab project to pglablib

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eelke 2017-12-29 10:21:10 +01:00
parent 206d734ff5
commit f4538069cb
44 changed files with 45 additions and 44 deletions
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91
pglab/ASyncDBConnection.h
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@ -1,91 +0,0 @@
#ifndef ASYNCDBCONNECTION_H
#define ASYNCDBCONNECTION_H
#include "Pgsql_Connection.h"
#include "Pgsql_Params.h"
#include "Pgsql_Result.h"
#include "Expected.h"
#include "ConnectionConfig.h"
#include <QElapsedTimer>
#include <functional>
#include <mutex>
#include <boost/asio/ip/tcp.hpp>
#include <boost/asio/io_service.hpp>
/** \brief Class that handles asynchronous execution of queries.
*
* Queries are passed to this class with a routine to call on completion
* when the result is received that routine is called. The asynchronous
* processing is done using boost::asio.
*
* You can cancel a running query but even then you have to wait for the result.
*/
class ASyncDBConnection {
public:
enum class State {
NotConnected,
Connecting,
Connected, ///< connected and idle
QuerySend, ///< connected query send expecting result
CancelSend, ///< cancel send expecting result
Terminating ///< shutting down
};
using on_result_callback = std::function<void(Expected<std::shared_ptr<Pgsql::Result>>, qint64)>;
explicit ASyncDBConnection(boost::asio::io_service &ios);
~ASyncDBConnection();
State state() const;
void setupConnection(const ConnectionConfig &config);
void closeConnection();
/** \defgroup send These function send queries to the server.
*
* The query string can actually contain multiple queries.
* These functions report their results through a callback function.
* If the command gives multiple results on_result will be called for each result.
*
* \note when the io_service that was passed to the constructor is running
* on a different thread the callback also will be done on that thread. Forward
* the call to your own thread if needed.
*
* \note while you can pass multiple queries to a single send call it is not allowed to
* send new queries while not all results have been received.
*/
/** \ingroup send
* \brief Function to send a command without parameters to the server.
*/
bool send(const std::string &command, on_result_callback on_result);
/** \ingroup send
* \brief Function to send a a command with parameters to the server.
*/
bool send(const std::string &command, Pgsql::Params params, on_result_callback on_result);
bool cancel();
using StateChangeReceiver = std::function<void(ASyncDBConnection::State)>;
void setStateChangeReceiver(StateChangeReceiver state_change_receiver);
using NoticeReceiver = std::function<void(Pgsql::ErrorDetails)>;
void setNoticeReceiver(NoticeReceiver notice_receiver);
private:
Pgsql::Connection m_connection;
boost::asio::ip::tcp::socket m_asioSock;
ConnectionConfig m_config;
State m_state = State::NotConnected;
Pgsql::Canceller m_canceller;
StateChangeReceiver m_stateChangeReceiver;
NoticeReceiver m_noticeReceiver;
QElapsedTimer m_timer;
void async_connect_handler(boost::system::error_code ec, std::size_t s);
void async_query_handler(boost::system::error_code ec, std::size_t s, on_result_callback on_result);
void doStateCallback(State state);
void processNotice(const PGresult *result);
};
#endif // ASYNCDBCONNECTION_H