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Extract into function

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This commit is contained in:
Antonio Andelic 2022-09-15 16:14:53 +00:00
parent 761d53b438
commit 39307f9dba
2 changed files with 70 additions and 66 deletions
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134
src/Coordination/KeeperDispatcher.cpp
View File

@ -84,70 +84,6 @@ void KeeperDispatcher::requestThread()
KeeperStorage::RequestsForSessions quorum_requests;
KeeperStorage::RequestsForSessions read_requests;
auto process_read_requests = [&, this](const auto & coordination_settings) mutable
{
if (coordination_settings->read_mode.toString() == "fastlinear")
{
// we just want to know what's the current latest committed log on Leader node
auto leader_info_result = server->getLeaderInfo();
if (leader_info_result)
{
leader_info_result->when_ready([&, requests_for_sessions = std::move(read_requests)](nuraft::cmd_result<nuraft::ptr<nuraft::buffer>> & result, nuraft::ptr<std::exception> & exception) mutable
{
if (!result.get_accepted() || result.get_result_code() == nuraft::cmd_result_code::TIMEOUT)
{
addErrorResponses(requests_for_sessions, Coordination::Error::ZOPERATIONTIMEOUT);
return;
}
else if (result.get_result_code() != nuraft::cmd_result_code::OK)
{
addErrorResponses(requests_for_sessions, Coordination::Error::ZCONNECTIONLOSS);
return;
}
else if (exception)
{
LOG_INFO(log, "Got exception while waiting for read results {}", exception->what());
addErrorResponses(requests_for_sessions, Coordination::Error::ZCONNECTIONLOSS);
return;
}
auto & leader_info_ctx = result.get();
if (!leader_info_ctx)
{
addErrorResponses(requests_for_sessions, Coordination::Error::ZCONNECTIONLOSS);
return;
}
KeeperServer::NodeInfo leader_info;
leader_info.term = leader_info_ctx->get_ulong();
leader_info.last_committed_index = leader_info_ctx->get_ulong();
std::lock_guard lock(leader_waiter_mutex);
auto node_info = server->getNodeInfo();
/// we're behind, we need to wait
if (node_info.term < leader_info.term || node_info.last_committed_index < leader_info.last_committed_index)
{
auto & leader_waiter = leader_waiters[leader_info];
leader_waiter.insert(leader_waiter.end(), requests_for_sessions.begin(), requests_for_sessions.end());
LOG_TRACE(log, "waiting for term {}, idx {}", leader_info.term, leader_info.last_committed_index);
}
/// process it in background thread
else if (!read_requests_queue.push(std::move(requests_for_sessions)))
throw Exception(ErrorCodes::SYSTEM_ERROR, "Cannot push read requests to queue");
});
}
}
else
{
assert(coordination_settings->read_mode.toString() == "nonlinear");
if (!read_requests_queue.push(std::move(read_requests)))
throw Exception(ErrorCodes::SYSTEM_ERROR, "Cannot push read requests to queue");
}
read_requests.clear();
};
auto process_quorum_requests = [&, this]() mutable
{
/// Forcefully process all previous pending requests
@ -205,7 +141,7 @@ void KeeperDispatcher::requestThread()
if (read_requests.size() > max_batch_size)
{
process_read_requests(coordination_settings);
processReadRequests(coordination_settings, read_requests);
if (previous_quorum_done())
break;
@ -225,7 +161,7 @@ void KeeperDispatcher::requestThread()
/// batch of read requests can send at most one request
/// so we don't care if the previous batch hasn't received response
if (!read_requests.empty())
process_read_requests(coordination_settings);
processReadRequests(coordination_settings, read_requests);
/// if we still didn't process previous batch we can
/// increase are current batch even more
@ -252,6 +188,72 @@ void KeeperDispatcher::requestThread()
}
}
void KeeperDispatcher::processReadRequests(const CoordinationSettingsPtr & coordination_settings, KeeperStorage::RequestsForSessions & read_requests)
{
if (coordination_settings->read_mode.toString() == "fastlinear")
{
// we just want to know what's the current latest committed log on Leader node
auto leader_info_result = server->getLeaderInfo();
if (leader_info_result)
{
leader_info_result->when_ready([&, requests_for_sessions = std::move(read_requests)](nuraft::cmd_result<nuraft::ptr<nuraft::buffer>> & result, nuraft::ptr<std::exception> & exception) mutable
{
if (!result.get_accepted() || result.get_result_code() == nuraft::cmd_result_code::TIMEOUT)
{
addErrorResponses(requests_for_sessions, Coordination::Error::ZOPERATIONTIMEOUT);
return;
}
if (result.get_result_code() != nuraft::cmd_result_code::OK)
{
addErrorResponses(requests_for_sessions, Coordination::Error::ZCONNECTIONLOSS);
return;
}
if (exception)
{
LOG_INFO(log, "Got exception while waiting for read results {}", exception->what());
addErrorResponses(requests_for_sessions, Coordination::Error::ZCONNECTIONLOSS);
return;
}
auto & leader_info_ctx = result.get();
if (!leader_info_ctx)
{
addErrorResponses(requests_for_sessions, Coordination::Error::ZCONNECTIONLOSS);
return;
}
KeeperServer::NodeInfo leader_info;
leader_info.term = leader_info_ctx->get_ulong();
leader_info.last_committed_index = leader_info_ctx->get_ulong();
std::lock_guard lock(leader_waiter_mutex);
auto node_info = server->getNodeInfo();
/// we're behind, we need to wait
if (node_info.term < leader_info.term || node_info.last_committed_index < leader_info.last_committed_index)
{
auto & leader_waiter = leader_waiters[leader_info];
leader_waiter.insert(leader_waiter.end(), requests_for_sessions.begin(), requests_for_sessions.end());
LOG_TRACE(log, "waiting for term {}, idx {}", leader_info.term, leader_info.last_committed_index);
}
/// process it in background thread
else if (!read_requests_queue.push(std::move(requests_for_sessions)))
throw Exception(ErrorCodes::SYSTEM_ERROR, "Cannot push read requests to queue");
});
}
}
else
{
assert(coordination_settings->read_mode.toString() == "nonlinear");
if (!read_requests_queue.push(std::move(read_requests)))
throw Exception(ErrorCodes::SYSTEM_ERROR, "Cannot push read requests to queue");
}
read_requests.clear();
}
void KeeperDispatcher::responseThread()
{
setThreadName("KeeperRspT");

2
src/Coordination/KeeperDispatcher.h
View File

@ -125,6 +125,8 @@ private:
void finalizeRequestsThread();
void processReadRequests(const CoordinationSettingsPtr & coordination_settings, KeeperStorage::RequestsForSessions & read_requests);
void setResponse(int64_t session_id, const Coordination::ZooKeeperResponsePtr & response);
/// Add error responses for requests to responses queue.