mirror of
https://github.com/scylladb/scylladb.git
synced 2026-04-29 12:47:02 +00:00
0de69136d4
First, it's to fix the discarded future during the register. The future is not actually such, as it's always the no-op ready one as at that stage the view_update_generator is neither aborted nor is in throttling state. Second, this change is to keep database start-up code in main shorter and cleaner. Registering staging sstables belongs to the view_update_generator start code. Signed-off-by: Pavel Emelyanov <xemul@scylladb.com>
64 lines
2.0 KiB
C++
64 lines
2.0 KiB
C++
/*
|
|
* Copyright (C) 2018-present ScyllaDB
|
|
*/
|
|
|
|
/*
|
|
* This file is part of Scylla.
|
|
*
|
|
* Scylla is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU Affero General Public License as published by
|
|
* the Free Software Foundation, either version 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* Scylla 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 Scylla. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#include "database.hh"
|
|
#include "sstables/shared_sstable.hh"
|
|
|
|
#include <seastar/core/abort_source.hh>
|
|
#include <seastar/core/condition-variable.hh>
|
|
#include <seastar/core/semaphore.hh>
|
|
|
|
namespace db::view {
|
|
|
|
class view_update_generator {
|
|
public:
|
|
static constexpr size_t registration_queue_size = 5;
|
|
|
|
private:
|
|
database& _db;
|
|
seastar::abort_source _as;
|
|
future<> _started = make_ready_future<>();
|
|
seastar::condition_variable _pending_sstables;
|
|
named_semaphore _registration_sem{registration_queue_size, named_semaphore_exception_factory{"view update generator"}};
|
|
std::unordered_map<lw_shared_ptr<table>, std::vector<sstables::shared_sstable>> _sstables_with_tables;
|
|
std::unordered_map<lw_shared_ptr<table>, std::vector<sstables::shared_sstable>> _sstables_to_move;
|
|
metrics::metric_groups _metrics;
|
|
public:
|
|
view_update_generator(database& db) : _db(db) {
|
|
setup_metrics();
|
|
discover_staging_sstables();
|
|
}
|
|
|
|
future<> start();
|
|
future<> stop();
|
|
future<> register_staging_sstable(sstables::shared_sstable sst, lw_shared_ptr<table> table);
|
|
|
|
ssize_t available_register_units() const { return _registration_sem.available_units(); }
|
|
private:
|
|
bool should_throttle() const;
|
|
void setup_metrics();
|
|
void discover_staging_sstables();
|
|
};
|
|
|
|
}
|