e4d78b60ff
The view update generator completely lacked metrics, so a basic set of them is now exposed.
68 lines
2.2 KiB
C++
68 lines
2.2 KiB
C++
/*
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* Copyright (C) 2018 ScyllaDB
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*/
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/*
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* This file is part of Scylla.
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*
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* Scylla is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* Scylla is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with Scylla. If not, see <http://www.gnu.org/licenses/>.
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*/
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#pragma once
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#include "database_fwd.hh"
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#include "sstables/sstables.hh"
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#include "db/view/view_updating_consumer.hh"
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#include <seastar/core/abort_source.hh>
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#include <seastar/core/condition-variable.hh>
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#include <seastar/core/semaphore.hh>
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namespace db::view {
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class view_update_generator {
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public:
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static constexpr size_t registration_queue_size = 5;
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private:
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database& _db;
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seastar::abort_source _as;
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future<> _started = make_ready_future<>();
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seastar::condition_variable _pending_sstables;
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named_semaphore _registration_sem{registration_queue_size, named_semaphore_exception_factory{"view update generator"}};
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struct sstable_with_table {
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sstables::shared_sstable sst;
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lw_shared_ptr<table> t;
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sstable_with_table(sstables::shared_sstable sst, lw_shared_ptr<table> t) : sst(std::move(sst)), t(std::move(t)) { }
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};
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std::unordered_map<lw_shared_ptr<table>, std::vector<sstables::shared_sstable>> _sstables_with_tables;
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std::unordered_map<lw_shared_ptr<table>, std::vector<sstables::shared_sstable>> _sstables_to_move;
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metrics::metric_groups _metrics;
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public:
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view_update_generator(database& db) : _db(db) {
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setup_metrics();
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}
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future<> start();
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future<> stop();
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future<> register_staging_sstable(sstables::shared_sstable sst, lw_shared_ptr<table> table);
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ssize_t available_register_units() const { return _registration_sem.available_units(); }
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private:
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bool should_throttle() const;
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void setup_metrics();
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};
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}
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