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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#include "ddbstate.h"
#include <cassert>
namespace proton {
std::vector<vespalib::string> DDBState::_stateNames =
{
"CONSTRUCT",
"LOAD",
"REPLAY_TRANSACTION_LOG",
"REDO_REPROCESS",
"APPLY_LIVE_CONFIG",
"REPROCESS",
"ONLINE",
"SHUTDOWN",
"DEAD",
};
std::vector<vespalib::string> DDBState::_configStateNames =
{
"OK",
"NEED_RESTART"
};
DDBState::DDBState()
: _state(State::CONSTRUCT),
_configState(ConfigState::OK),
_lock(),
_cond()
{
}
DDBState::~DDBState() = default;
bool
DDBState::enterLoadState()
{
Guard guard(_lock);
if (getClosed()) {
return false;
}
assert(getState() == State::CONSTRUCT);
set_state(State::LOAD);
return true;
}
bool
DDBState::enterReplayTransactionLogState()
{
Guard guard(_lock);
if (getClosed()) {
return false;
}
assert(getState() == State::LOAD);
set_state(State::REPLAY_TRANSACTION_LOG);
return true;
}
bool
DDBState::enterRedoReprocessState()
{
Guard guard(_lock);
if (getClosed()) {
return false;
}
assert(getState() == State::REPLAY_TRANSACTION_LOG);
set_state(State::REDO_REPROCESS);
return true;
}
bool
DDBState::enterApplyLiveConfigState()
{
Guard guard(_lock);
if (getClosed()) {
return false;
}
State state(getState());
assert(state == State::REPLAY_TRANSACTION_LOG ||
state == State::REDO_REPROCESS);
set_state(State::APPLY_LIVE_CONFIG);
return true;
}
bool
DDBState::enterReprocessState()
{
Guard guard(_lock);
if (getClosed()) {
return false;
}
assert(getState() == State::APPLY_LIVE_CONFIG);
set_state(State::REPROCESS);
return true;
}
bool
DDBState::enterOnlineState()
{
Guard guard(_lock);
if (getClosed()) {
return false;
}
assert(getState() == State::REPROCESS);
set_state(State::ONLINE);
_cond.notify_all();
return true;
}
void
DDBState::enterShutdownState()
{
Guard guard(_lock);
// Shutdown can be initiated before online state was reached
if (getClosed()) {
return;
}
set_state(State::SHUTDOWN);
_cond.notify_all();
}
void
DDBState::enterDeadState()
{
Guard guard(_lock);
if (getState() == State::DEAD) {
return;
}
assert(getState() == State::SHUTDOWN);
set_state(State::DEAD);
_cond.notify_all();
}
void
DDBState::setConfigState(ConfigState newConfigState)
{
Guard guard(_lock);
_configState.store(newConfigState, std::memory_order_relaxed);
}
void
DDBState::clearDelayedConfig()
{
setConfigState(ConfigState::OK);
}
vespalib::string
DDBState::getStateString(State state)
{
return _stateNames[static_cast<unsigned int>(state)];
}
vespalib::string
DDBState::getConfigStateString(ConfigState configState)
{
return _configStateNames[static_cast<unsigned int>(configState)];
}
void
DDBState::waitForOnlineState()
{
GuardLock lk(_lock);
_cond.wait(lk, [this] { return this->getState() >= State::ONLINE; } );
}
} // namespace proton
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