tdlight/tddb/td/db/binlog/detail/BinlogEventsProcessor.cpp
2023-02-09 22:53:04 +01:00

81 lines
2.8 KiB
C++

//
// Copyright Aliaksei Levin (levlam@telegram.org), Arseny Smirnov (arseny30@gmail.com) 2014-2023
//
// Distributed under the Boost Software License, Version 1.0. (See accompanying
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
//
#include "td/db/binlog/detail/BinlogEventsProcessor.h"
#include "td/utils/SliceBuilder.h"
#include "td/utils/Status.h"
#include <algorithm>
namespace td {
namespace detail {
Status BinlogEventsProcessor::do_event(BinlogEvent &&event) {
offset_ = event.offset_;
auto fixed_event_id = event.id_ * 2;
if ((event.flags_ & BinlogEvent::Flags::Rewrite) && !event_ids_.empty() && event_ids_.back() >= fixed_event_id) {
auto it = std::lower_bound(event_ids_.begin(), event_ids_.end(), fixed_event_id);
if (it == event_ids_.end() || *it != fixed_event_id) {
return Status::Error(PSLICE() << "Ignore rewrite log event " << event.public_to_string());
}
auto pos = it - event_ids_.begin();
total_raw_events_size_ -= static_cast<int64>(events_[pos].raw_event_.size());
if (event.type_ == BinlogEvent::ServiceTypes::Empty) {
*it += 1;
empty_events_++;
events_[pos] = {};
} else {
event.flags_ &= ~BinlogEvent::Flags::Rewrite;
total_raw_events_size_ += static_cast<int64>(event.raw_event_.size());
events_[pos] = std::move(event);
}
} else if (event.type_ < 0) {
// just skip service events
} else {
if (!(event_ids_.empty() || event_ids_.back() < fixed_event_id)) {
return Status::Error(PSLICE() << offset_ << ' ' << event_ids_.size() << ' ' << event_ids_.back() << ' '
<< fixed_event_id << ' ' << event.public_to_string() << ' ' << total_events_ << ' '
<< total_raw_events_size_);
}
last_event_id_ = event.id_;
total_raw_events_size_ += static_cast<int64>(event.raw_event_.size());
total_events_++;
event_ids_.push_back(fixed_event_id);
events_.emplace_back(std::move(event));
}
if (total_events_ > 10 && empty_events_ * 4 > total_events_ * 3) {
compactify();
}
return Status::OK();
}
void BinlogEventsProcessor::compactify() {
CHECK(event_ids_.size() == events_.size());
auto event_ids_from = event_ids_.begin();
auto event_ids_to = event_ids_from;
auto events_from = events_.begin();
auto events_to = events_from;
for (; event_ids_from != event_ids_.end(); event_ids_from++, events_from++) {
if ((*event_ids_from & 1) == 0) {
*event_ids_to++ = *event_ids_from;
if (events_to != events_from) {
*events_to = std::move(*events_from);
}
events_to++;
}
}
event_ids_.erase(event_ids_to, event_ids_.end());
events_.erase(events_to, events_.end());
total_events_ = event_ids_.size();
empty_events_ = 0;
CHECK(event_ids_.size() == events_.size());
}
} // namespace detail
} // namespace td