77 lines
2.0 KiB
C++
77 lines
2.0 KiB
C++
/*
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* Copyright (C) 2017 ScyllaDB
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*
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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 <seastar/core/shared_ptr.hh>
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#include "shared_sstable.hh"
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namespace sstables {
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struct writer_offset_tracker {
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uint64_t offset = 0;
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};
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class write_monitor {
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public:
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virtual ~write_monitor() { }
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virtual void on_write_started(const writer_offset_tracker&) = 0;
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virtual void on_data_write_completed() = 0;
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};
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write_monitor& default_write_monitor();
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struct reader_position_tracker {
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uint64_t position = 0;
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uint64_t total_read_size = 0;
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};
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class read_monitor {
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public:
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virtual ~read_monitor() { }
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// parameters are the current position in the data file
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virtual void on_read_started(const reader_position_tracker&) = 0;
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virtual void on_read_completed() = 0;
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};
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struct noop_read_monitor final : public read_monitor {
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virtual void on_read_started(const reader_position_tracker&) override {}
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virtual void on_read_completed() override {}
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};
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read_monitor& default_read_monitor();
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struct read_monitor_generator {
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virtual read_monitor& operator()(shared_sstable sst) = 0;
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virtual ~read_monitor_generator() {}
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};
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struct no_read_monitoring final : public read_monitor_generator {
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virtual read_monitor& operator()(shared_sstable sst) override {
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return default_read_monitor();
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};
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};
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read_monitor_generator& default_read_monitor_generator();
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}
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