461 lines
14 KiB
C++
461 lines
14 KiB
C++
#include "ASyncDBConnection.h"
|
|
#include "waithandlelist.h"
|
|
#include "ScopeGuard.h"
|
|
#include <chrono>
|
|
#include <sys/select.h>
|
|
|
|
using namespace boost::asio;
|
|
|
|
ASyncDBConnection::ASyncDBConnection(boost::asio::io_service &ios)
|
|
: m_asioSock(ios)
|
|
{
|
|
|
|
}
|
|
|
|
ASyncDBConnection::State ASyncDBConnection::state() const
|
|
{
|
|
return m_state;
|
|
}
|
|
|
|
void ASyncDBConnection::setupConnection(const ConnectionConfig &config)
|
|
{
|
|
// if (m_thread.joinable()) {
|
|
// m_threadData.stop();
|
|
// m_thread.join();
|
|
// }
|
|
// m_threadData.m_config = config;
|
|
// m_thread = std::thread([this] () { m_threadData.run(); });
|
|
|
|
m_config = config;
|
|
auto keywords = m_config.getKeywords();
|
|
auto values = m_config.getValues();
|
|
|
|
bool ok = m_connection.connectStart(keywords, values);
|
|
// auto start = std::chrono::steady_clock::now();
|
|
if (ok && m_connection.status() != CONNECTION_BAD) {
|
|
auto sock_handle = m_connection.socket();
|
|
m_asioSock.assign(ip::tcp::v4(), sock_handle);
|
|
m_asioSock.non_blocking(true);
|
|
|
|
m_asioSock.async_write_some(null_buffers(),
|
|
[this] (boost::system::error_code ec, std::size_t s)
|
|
{ async_connect_handler(ec, s); }
|
|
);
|
|
}
|
|
}
|
|
|
|
void ASyncDBConnection::async_connect_handler(boost::system::error_code ec, std::size_t s)
|
|
{
|
|
auto poll_state = m_connection.connectPoll();
|
|
if (poll_state == PGRES_POLLING_OK) {
|
|
// if connected return true
|
|
doStateCallback(State::Connected);
|
|
}
|
|
else if (poll_state == PGRES_POLLING_FAILED) {
|
|
doStateCallback(State::NotConnected);
|
|
}
|
|
else if (poll_state == PGRES_POLLING_READING) {
|
|
doStateCallback(State::Connecting);
|
|
m_asioSock.async_read_some(null_buffers(),
|
|
[this] (boost::system::error_code ec, std::size_t s)
|
|
{ async_connect_handler(ec, s); }
|
|
);
|
|
}
|
|
else if (poll_state == PGRES_POLLING_WRITING) {
|
|
doStateCallback(State::Connecting);
|
|
m_asioSock.async_write_some(null_buffers(),
|
|
[this] (boost::system::error_code ec, std::size_t s)
|
|
{ async_connect_handler(ec, s); }
|
|
);
|
|
}
|
|
}
|
|
|
|
void ASyncDBConnection::doStateCallback(State state)
|
|
{
|
|
m_state = state;
|
|
if (state == State::Connected) {
|
|
m_connection.setNoticeReceiver(
|
|
[this](const PGresult *result) { processNotice(result); });
|
|
}
|
|
|
|
std::lock_guard<std::mutex> lg(m_stateCallback.m_mutex);
|
|
if (m_stateCallback.m_func) {
|
|
m_stateCallback.m_func(state);
|
|
}
|
|
|
|
}
|
|
|
|
|
|
void ASyncDBConnection::closeConnection()
|
|
{
|
|
// m_threadData.stop();
|
|
// if (m_thread.joinable()) {
|
|
// m_thread.join();
|
|
// }
|
|
// SHould this be async too????
|
|
m_connection.close();
|
|
}
|
|
|
|
bool ASyncDBConnection::send(const std::string &command, on_result_callback on_result)
|
|
{
|
|
// {
|
|
// std::lock_guard<std::mutex> lg(m_threadData.m_commandQueue.m_mutex);
|
|
// m_threadData.m_commandQueue.m_queue.emplace(command, on_result);
|
|
// m_threadData.m_commandQueue.m_newEvent.notify_one();
|
|
// }
|
|
|
|
m_connection.sendQuery(command);
|
|
m_timer.start();
|
|
doStateCallback(State::QuerySend);
|
|
m_asioSock.async_read_some(null_buffers(),
|
|
[this, on_result] (boost::system::error_code ec, std::size_t s)
|
|
{ async_query_handler(ec, s, on_result); }
|
|
);
|
|
return true;
|
|
}
|
|
|
|
bool ASyncDBConnection::send(const std::string &command, Pgsql::Params params, on_result_callback on_result)
|
|
{
|
|
// {
|
|
// std::lock_guard<std::mutex> lg(m_threadData.m_commandQueue.m_mutex);
|
|
// m_threadData.m_commandQueue.m_queue.emplace(command, std::move(params), on_result);
|
|
// m_threadData.m_commandQueue.m_newEvent.notify_one();
|
|
// }
|
|
m_connection.sendQueryParams(command.c_str(), params);
|
|
m_timer.start();
|
|
doStateCallback(State::QuerySend);
|
|
m_asioSock.async_read_some(null_buffers(),
|
|
[this, on_result] (boost::system::error_code ec, std::size_t s)
|
|
{ async_query_handler(ec, s, on_result); }
|
|
);
|
|
return true;
|
|
}
|
|
|
|
void ASyncDBConnection::async_query_handler(boost::system::error_code ec, std::size_t s, on_result_callback on_result)
|
|
{
|
|
bool finished = false;
|
|
if (m_connection.consumeInput()) {
|
|
while ( ! finished && ! m_connection.isBusy()) {
|
|
auto res = m_connection.getResult();
|
|
qint64 ms = m_timer.restart();
|
|
on_result(res, ms);
|
|
if (res == nullptr) {
|
|
m_timer.invalidate();
|
|
doStateCallback(State::Connected);
|
|
finished = true;
|
|
}
|
|
}
|
|
// else is still waiting for more data
|
|
}
|
|
else {
|
|
// error during consume
|
|
|
|
}
|
|
//return finished;
|
|
if (!finished) {
|
|
// wait for more
|
|
m_asioSock.async_read_some(null_buffers(),
|
|
[this, on_result] (boost::system::error_code ec, std::size_t s)
|
|
{ async_query_handler(ec, s, on_result); }
|
|
);
|
|
}
|
|
}
|
|
|
|
bool ASyncDBConnection::cancel()
|
|
{
|
|
return false; //m_threadData.cancel();
|
|
}
|
|
|
|
void ASyncDBConnection::setStateCallback(on_state_callback state_callback)
|
|
{
|
|
std::lock_guard<std::mutex> lg(m_stateCallback.m_mutex);
|
|
m_stateCallback.m_func = state_callback;
|
|
}
|
|
|
|
void ASyncDBConnection::setNoticeCallback(on_notice_callback notice_callback)
|
|
{
|
|
std::lock_guard<std::mutex> lg(m_noticeCallback.m_mutex);
|
|
m_noticeCallback.m_func = notice_callback;
|
|
}
|
|
|
|
void ASyncDBConnection::processNotice(const PGresult *result)
|
|
{
|
|
std::lock_guard<std::mutex> lg(m_noticeCallback.m_mutex);
|
|
if (m_noticeCallback.m_func) {
|
|
Pgsql::ErrorDetails details = Pgsql::ErrorDetails::createErrorDetailsFromPGresult(result);
|
|
m_noticeCallback.m_func(details);
|
|
}
|
|
}
|
|
|
|
// ASyncDBConnection::Thread::Thread()
|
|
// {}
|
|
//
|
|
// void ASyncDBConnection::Thread::run()
|
|
// {
|
|
// m_terminated = false;
|
|
// SCOPE_EXIT {
|
|
// m_state = State::NotConnected;
|
|
// m_terminated = true;
|
|
// };
|
|
// while (!terminateRequested) {
|
|
//
|
|
// // make or recover connection
|
|
// if (makeConnection()) {
|
|
// m_connection.setNoticeReceiver(
|
|
// [this](const PGresult *result) { processNotice(result); });
|
|
// m_canceller = m_connection.getCancel();
|
|
//
|
|
//
|
|
// // send commands and receive results
|
|
// communicate();
|
|
// }
|
|
// else {
|
|
// // It is not possible to determine the source of the problem.
|
|
// // Accept for PQconnectionNeedsPassword
|
|
//
|
|
// // Pass problem to main thread and stop this thread
|
|
//
|
|
// // Main thread needs to know it has to restart connecting if it want's to.
|
|
// // TODO: add status functions to help main thread so it doesn't have to remember
|
|
// // everything reported through callbacks.
|
|
//
|
|
// break;
|
|
// }
|
|
// }
|
|
// // close connection
|
|
// }
|
|
//
|
|
// bool ASyncDBConnection::Thread::cancel()
|
|
// {
|
|
// return m_canceller.cancel(nullptr);
|
|
// }
|
|
|
|
// bool ASyncDBConnection::Thread::makeConnection()
|
|
// {
|
|
// //using namespace std::literals::chrono_literals;
|
|
//
|
|
// // start connecting
|
|
// auto keywords = m_config.getKeywords();
|
|
// auto values = m_config.getValues();
|
|
// #if true
|
|
// bool result = m_connection.connect(keywords, values, 0);
|
|
// if (result) {
|
|
// doStateCallback(State::Connected);
|
|
// }
|
|
// return result;
|
|
// #else
|
|
// while (!terminateRequested) {
|
|
//
|
|
// bool ok = m_connection.connectStart(keywords, values);
|
|
// auto start = std::chrono::steady_clock::now();
|
|
// if (ok && m_connection.status() != CONNECTION_BAD) {
|
|
// int sock = m_connection.socket();
|
|
// Win32Event socket_event(Win32Event::Reset::Auto, Win32Event::Initial::Clear);
|
|
//
|
|
// long fd = FD_WRITE;
|
|
// while (true) {
|
|
// // poll till complete or failed (we can get an abort command)
|
|
// WSAEventSelect(sock, socket_event.handle(), fd);
|
|
// WaitHandleList whl;
|
|
// auto wait_result_socket_event = whl.add(socket_event);
|
|
// //auto wait_result_stop = whl.add(m_stopEvent);
|
|
//
|
|
// auto nu = std::chrono::steady_clock::now();
|
|
// std::chrono::duration<float, std::milli> diff = -(nu-start);
|
|
// diff += 30s;
|
|
// DWORD timeout = diff.count();
|
|
//
|
|
// DWORD res = MsgWaitForMultipleObjectsEx(
|
|
// whl.count(), // _In_ DWORD nCount,
|
|
// whl, // _In_ const HANDLE *pHandles,
|
|
// timeout, // _In_ DWORD dwMilliseconds,
|
|
// 0, // _In_ DWORD dwWakeMask,
|
|
// 0 // _In_ DWORD dwFlags
|
|
// );
|
|
// if (res == wait_result_socket_event) {
|
|
// auto poll_state = m_connection.connectPoll();
|
|
// if (poll_state == PGRES_POLLING_OK) {
|
|
// // if connected return true
|
|
// doStateCallback(State::Connected);
|
|
// return true;
|
|
// }
|
|
// else if (poll_state == PGRES_POLLING_FAILED) {
|
|
// doStateCallback(State::NotConnected);
|
|
// return false;
|
|
// }
|
|
// else if (poll_state == PGRES_POLLING_READING) {
|
|
// doStateCallback(State::Connecting);
|
|
// fd = FD_READ;
|
|
// }
|
|
// else if (poll_state == PGRES_POLLING_WRITING) {
|
|
// doStateCallback(State::Connecting);
|
|
// fd = FD_WRITE;
|
|
// }
|
|
// }
|
|
// else if (res == wait_result_stop) {
|
|
//
|
|
// }
|
|
// } // end while (true)
|
|
// }
|
|
// }
|
|
// return false;
|
|
// #endif
|
|
// }
|
|
//
|
|
// void ASyncDBConnection::Thread::communicate()
|
|
// {
|
|
// while (!terminateRequested) {
|
|
// // wait for something to do:
|
|
// // - command to send to server
|
|
// // - wait for results and (notifies can also come in)
|
|
// // - pass each result on to the completion routine
|
|
// // - notify comming in from the server
|
|
// // - pass to notify callback
|
|
// // - connection raises an error
|
|
// // - return
|
|
// // - stop signal
|
|
// // - return
|
|
//
|
|
//
|
|
// if (m_state == State::Connected) {
|
|
// waitForAndSendCommand();
|
|
// }
|
|
// else if (m_state == State::QuerySend || m_state == State::CancelSend) {
|
|
// // Wait for result, even after a cancel we should wait, for all results
|
|
// // New command's are not excepted when one has been send
|
|
// waitForResult();
|
|
// }
|
|
//
|
|
// }
|
|
// }
|
|
//
|
|
// void ASyncDBConnection::Thread::stop()
|
|
// {
|
|
// terminateRequested = true;
|
|
// //m_stopEvent.set();
|
|
// }
|
|
|
|
// void ASyncDBConnection::Thread::doStateCallback(State state)
|
|
// {
|
|
// m_state = state;
|
|
// std::lock_guard<std::mutex> lg(m_stateCallback.m_mutex);
|
|
// if (m_stateCallback.m_func) {
|
|
// m_stateCallback.m_func(state);
|
|
// }
|
|
// }
|
|
|
|
// void ASyncDBConnection::Thread::waitForAndSendCommand()
|
|
// {
|
|
// using namespace std::chrono_literals;
|
|
// // lock the data
|
|
// std::unique_lock<std::mutex> lk(m_commandQueue.m_mutex);
|
|
// if (m_commandQueue.m_queue.empty()) {
|
|
// // no data wait till there is data
|
|
// m_commandQueue.m_newEvent.wait_for(lk, 1000ms);
|
|
// // can we use the predicate to reimplement the stop function???, []{return ready;});
|
|
//
|
|
// }
|
|
// doNewCommand();
|
|
//
|
|
// #if false
|
|
// WaitHandleList whl;
|
|
// auto wait_result_new_command = whl.add(m_commandQueue.m_newEvent);
|
|
// //auto wait_result_stop =
|
|
// //whl.add(m_stopEvent);
|
|
//
|
|
// DWORD res = MsgWaitForMultipleObjectsEx(
|
|
// whl.count(), // _In_ DWORD nCount,
|
|
// whl, // _In_ const HANDLE *pHandles,
|
|
// INFINITE, // _In_ DWORD dwMilliseconds,
|
|
// 0, // _In_ DWORD dwWakeMask,
|
|
// 0 // _In_ DWORD dwFlags
|
|
// );
|
|
// if (res == wait_result_new_command) {
|
|
// doNewCommand();
|
|
// }
|
|
// // if (res == wait_result_stop) return;
|
|
// #endif
|
|
// }
|
|
|
|
// void ASyncDBConnection::Thread::doNewCommand()
|
|
// {
|
|
// // get command from top of queue (but leave it in the queue, we need the callback)
|
|
// if (! m_commandQueue.m_queue.empty()) {
|
|
// const Command &command = m_commandQueue.m_queue.front();
|
|
// if (!command.command.empty()) {
|
|
// bool query_send = false;
|
|
// if (command.params.empty())
|
|
// query_send = m_connection.sendQuery(command.command.c_str());
|
|
// else
|
|
// query_send = m_connection.sendQueryParams(command.command.c_str(), command.params);
|
|
//
|
|
// if (query_send) {
|
|
// m_timer.start();
|
|
// doStateCallback(State::QuerySend);
|
|
// }
|
|
// else {
|
|
// std::string error = m_connection.getErrorMessage();
|
|
// // todo: need to report the error
|
|
// }
|
|
// }
|
|
// }
|
|
//
|
|
// }
|
|
|
|
// bool ASyncDBConnection::Thread::consumeResultInput()
|
|
// {
|
|
// bool finished = false;
|
|
// if (m_connection.consumeInput()) {
|
|
// while ( ! finished && ! m_connection.isBusy()) {
|
|
// auto res(m_connection.getResult());
|
|
// {
|
|
// qint64 ms = m_timer.restart();
|
|
// std::lock_guard<std::mutex> lg(m_commandQueue.m_mutex);
|
|
// m_commandQueue.m_queue.front().on_result(res, ms);
|
|
// if (res == nullptr) {
|
|
// m_timer.invalidate();
|
|
// m_commandQueue.m_queue.pop();
|
|
// doStateCallback(State::Connected);
|
|
// finished = true;
|
|
// }
|
|
// }
|
|
//
|
|
// }
|
|
// // else is still waiting for more data
|
|
//
|
|
// }
|
|
// else {
|
|
// // error during consume
|
|
//
|
|
// }
|
|
// return finished;
|
|
// }
|
|
|
|
// void ASyncDBConnection::Thread::waitForResult()
|
|
// {
|
|
// int sock = m_connection.socket();
|
|
//
|
|
// fd_set readfds;
|
|
// timeval timeout;
|
|
// bool finished = false;
|
|
// while (!finished && !terminateRequested) {
|
|
// FD_ZERO(&readfds);
|
|
// FD_SET(sock, &readfds);
|
|
//
|
|
// timeout.tv_sec = 5;
|
|
// timeout.tv_usec = 0;
|
|
//
|
|
// int select_result = select(sock + 1, &readfds, nullptr, nullptr, &timeout);
|
|
// if (select_result > 0) {
|
|
// if (FD_ISSET(sock, &readfds)) {
|
|
// if (consumeResultInput()) {
|
|
// finished = true;
|
|
// }
|
|
// }
|
|
// }
|
|
//
|
|
// }
|
|
// }
|
|
|
|
/*
|
|
*/
|