129 lines
3.8 KiB
C++
129 lines
3.8 KiB
C++
/*
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* Copyright (C) 2018-present 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 "mutation.hh"
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#include "range_tombstone_assembler.hh"
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class mutation_rebuilder {
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mutation _m;
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public:
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mutation_rebuilder(dht::decorated_key dk, schema_ptr s)
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: _m(std::move(s), std::move(dk)) {
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}
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stop_iteration consume(tombstone t) {
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_m.partition().apply(t);
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return stop_iteration::no;
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}
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stop_iteration consume(range_tombstone&& rt) {
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_m.partition().apply_row_tombstone(*_m.schema(), std::move(rt));
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return stop_iteration::no;
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}
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stop_iteration consume(static_row&& sr) {
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_m.partition().static_row().apply(*_m.schema(), column_kind::static_column, std::move(sr.cells()));
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return stop_iteration::no;
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}
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stop_iteration consume(clustering_row&& cr) {
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auto& dr = _m.partition().clustered_row(*_m.schema(), std::move(cr.key()));
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dr.apply(cr.tomb());
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dr.apply(cr.marker());
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dr.cells().apply(*_m.schema(), column_kind::regular_column, std::move(cr.cells()));
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return stop_iteration::no;
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}
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mutation_opt consume_end_of_stream() {
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return mutation_opt(std::move(_m));
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}
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};
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// Builds the mutation corresponding to the next partition in the mutation fragment stream.
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// Implements FlattenedConsumerV2, MutationFragmentConsumerV2 and FlatMutationReaderConsumerV2.
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// Does not work with streams in streamed_mutation::forwarding::yes mode.
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class mutation_rebuilder_v2 {
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schema_ptr _s;
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std::optional<mutation_rebuilder> _builder;
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range_tombstone_assembler _rt_assembler;
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public:
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mutation_rebuilder_v2(schema_ptr s) : _s(std::move(s)) { }
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public:
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stop_iteration consume(partition_start mf) {
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consume_new_partition(mf.key());
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return consume(mf.partition_tombstone());
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}
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stop_iteration consume(partition_end) {
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return consume_end_of_partition();
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}
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stop_iteration consume(mutation_fragment_v2&& mf) {
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return std::move(mf).consume(*this);
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}
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public:
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void consume_new_partition(const dht::decorated_key& dk) {
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assert(!_builder);
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_builder = mutation_rebuilder(dk, _s);
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}
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stop_iteration consume(tombstone t) {
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assert(_builder);
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_builder->consume(t);
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return stop_iteration::no;
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}
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stop_iteration consume(range_tombstone_change&& rt) {
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assert(_builder);
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if (auto rt_opt = _rt_assembler.consume(*_s, std::move(rt))) {
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_builder->consume(std::move(*rt_opt));
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}
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return stop_iteration::no;
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}
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stop_iteration consume(static_row&& sr) {
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assert(_builder);
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_builder->consume(std::move(sr));
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return stop_iteration::no;
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}
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stop_iteration consume(clustering_row&& cr) {
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assert(_builder);
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_builder->consume(std::move(cr));
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return stop_iteration::no;
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}
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stop_iteration consume_end_of_partition() {
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assert(_builder);
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_rt_assembler.on_end_of_stream();
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return stop_iteration::yes;
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}
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mutation_opt consume_end_of_stream() {
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if (!_builder) {
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return mutation_opt();
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}
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_rt_assembler.on_end_of_stream();
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return _builder->consume_end_of_stream();
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}
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};
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