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/*
* Copyright (C) 2018 Codership Oy <info@codership.com>
*
* This file is part of wsrep-lib.
*
* Wsrep-lib 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 2 of the License, or
* (at your option) any later version.
*
* Wsrep-lib 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 wsrep-lib. If not, see <https://www.gnu.org/licenses/>.
*/
#include "db_server.hpp"
#include "db_server_service.hpp"
#include "db_high_priority_service.hpp"
#include "db_client.hpp"
#include "db_simulator.hpp"
#include "wsrep/logger.hpp"
#include <ostream>
#include <cstdio>
static wsrep::default_mutex logger_mtx;
static void
logger_fn(wsrep::log::level l, const char* pfx, const char* msg)
{
wsrep::unique_lock<wsrep::mutex> lock(logger_mtx);
struct timespec time;
clock_gettime(CLOCK_REALTIME, &time);
time_t const tt(time.tv_sec);
struct tm date;
localtime_r(&tt, &date);
char date_str[85] = { '\0', };
snprintf(date_str, sizeof(date_str) - 1,
"%04d-%02d-%02d %02d:%02d:%02d.%03d",
date.tm_year + 1900, date.tm_mon + 1, date.tm_mday,
date.tm_hour, date.tm_min, date.tm_sec, (int)time.tv_nsec/1000000);
std::cerr << date_str << ' ' << pfx << wsrep::log::to_c_string(l) << ' '
<< msg << std::endl;
}
db::server::server(simulator& simulator,
const std::string& name,
const std::string& address)
: simulator_(simulator)
, storage_engine_(simulator_.params())
, mutex_()
, cond_()
, server_service_(*this)
, reporter_(mutex_, name + ".json", 4)
, server_state_(server_service_,
name, address, "dbsim_" + name + "_data")
, last_client_id_(0)
, last_transaction_id_(0)
, appliers_()
, clients_()
, client_threads_()
, commit_mutex_()
, next_commit_seqno_()
, committed_seqno_()
{
wsrep::log::logger_fn(logger_fn);
}
void db::server::applier_thread()
{
wsrep::client_id client_id(last_client_id_.fetch_add(1) + 1);
db::client applier(*this, client_id,
wsrep::client_state::m_high_priority,
simulator_.params());
wsrep::client_state* cc(static_cast<wsrep::client_state*>(
&applier.client_state()));
db::high_priority_service hps(*this, applier);
cc->open(cc->id());
cc->before_command();
enum wsrep::provider::status ret(
server_state_.provider().run_applier(&hps));
wsrep::log_info() << "Applier thread exited with error code " << ret;
cc->after_command_before_result();
cc->after_command_after_result();
cc->close();
cc->cleanup();
}
void db::server::start_applier()
{
wsrep::unique_lock<wsrep::mutex> lock(mutex_);
appliers_.push_back(boost::thread(&server::applier_thread, this));
}
void db::server::stop_applier()
{
wsrep::unique_lock<wsrep::mutex> lock(mutex_);
appliers_.front().join();
appliers_.erase(appliers_.begin());
}
void db::server::start_clients()
{
size_t n_clients(simulator_.params().n_clients);
for (size_t i(0); i < n_clients; ++i)
{
start_client(i + 1);
}
}
void db::server::stop_clients()
{
for (auto& i : client_threads_)
{
i.join();
}
for (const auto& i : clients_)
{
const struct db::client::stats& stats(i->stats());
simulator_.stats_.commits += stats.commits;
simulator_.stats_.rollbacks += stats.rollbacks;
simulator_.stats_.replays += stats.replays;
}
}
void db::server::client_thread(const std::shared_ptr<db::client>& client)
{
client->start();
}
void db::server::start_client(size_t id)
{
auto client(std::make_shared<db::client>(
*this, wsrep::client_id(id),
wsrep::client_state::m_local,
simulator_.params()));
clients_.push_back(client);
client_threads_.push_back(
boost::thread(&db::server::client_thread, this, client));
}
void db::server::donate_sst(const std::string& req,
const wsrep::gtid& gtid,
bool bypass)
{
simulator_.sst(*this, req, gtid, bypass);
}
wsrep::high_priority_service* db::server::streaming_applier_service()
{
throw wsrep::not_implemented_error();
}
void db::server::log_state_change(enum wsrep::server_state::state from,
enum wsrep::server_state::state to)
{
wsrep::log_info() << "State changed " << from << " -> " << to;
reporter_.report_state(to);
}
void db::server::check_sequential_consistency(wsrep::client_id client_id,
uint64_t commit_seqno)
{
if (committed_seqno_ >= commit_seqno)
{
wsrep::log_error() << "Sequentiality violation for " << client_id
<< " commit seqno " << commit_seqno << " previous "
<< committed_seqno_;
::abort();
}
committed_seqno_ = commit_seqno;
}
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