fcb8d040e8
Instead of lengthy blurbs, switch to single-line, machine-readable standardized (https://spdx.dev) license identifiers. The Linux kernel switched long ago, so there is strong precedent. Three cases are handled: AGPL-only, Apache-only, and dual licensed. For the latter case, I chose (AGPL-3.0-or-later and Apache-2.0), reasoning that our changes are extensive enough to apply our license. The changes we applied mechanically with a script, except to licenses/README.md. Closes #9937
47 lines
1.4 KiB
C++
47 lines
1.4 KiB
C++
/*
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* Copyright (C) 2018-present ScyllaDB
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*/
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/*
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* SPDX-License-Identifier: AGPL-3.0-or-later
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*/
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#pragma once
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#include "mutation_reader.hh"
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#include <seastar/core/future.hh>
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#include "flat_mutation_reader.hh"
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/*
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* A helper class that wraps another flat_mutation_reader
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* and splits range tombstones across rows before pushing them
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* to the buffer.
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*
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* Used for bringing mutation stream read from old SSTables formats (ka/la)
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* to the uniformed representation with that of a new format (mc).
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*/
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class normalizing_reader : public flat_mutation_reader::impl {
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flat_mutation_reader _rd;
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range_tombstone_stream _range_tombstones;
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public:
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normalizing_reader(flat_mutation_reader rd);
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virtual future<> fill_buffer() override;
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virtual future<> next_partition() override;
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virtual future<> fast_forward_to(const dht::partition_range& pr) override;
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virtual future<> fast_forward_to(position_range pr) override;
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virtual future<> close() noexcept override;
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};
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// Creates a mutation_reader wrapper which creates a new stream of mutations
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// with some mutations removed from the original stream.
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// MutationFilter is a callable which decides which mutations are dropped. It
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// accepts mutation const& and returns a bool. The mutation stays in the
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// stream if and only if the filter returns true.
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flat_mutation_reader make_normalizing_reader(flat_mutation_reader rd);
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