Files
scylladb/mutation_partition_serializer.cc
Avi Kivity 635c32eb32 mutation_partition_serializer: avoid auto in function argument declaration
'auto' in a non-lambda function argument is not legal C++, and is hard
to read besides.  Replace with the right type.
2017-04-17 23:18:44 +03:00

259 lines
11 KiB
C++

/*
* Copyright (C) 2015 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/>.
*/
#include "mutation_partition_serializer.hh"
#include "mutation_partition.hh"
#include "counters.hh"
#include "utils/UUID.hh"
#include "serializer.hh"
#include "idl/uuid.dist.hh"
#include "idl/keys.dist.hh"
#include "idl/mutation.dist.hh"
#include "serializer_impl.hh"
#include "serialization_visitors.hh"
#include "idl/uuid.dist.impl.hh"
#include "idl/keys.dist.impl.hh"
#include "idl/mutation.dist.impl.hh"
#include "range_tombstone_to_prefix_tombstone_converter.hh"
#include "service/storage_service.hh"
using namespace db;
namespace {
template<typename Writer>
auto write_live_cell(Writer&& writer, atomic_cell_view c)
{
return std::move(writer).write_created_at(c.timestamp())
.write_value(c.value())
.end_live_cell();
}
template<typename Writer>
auto write_counter_cell(Writer&& writer, atomic_cell_view c)
{
auto value = std::move(writer).write_created_at(c.timestamp());
return [&c, value = std::move(value)] () mutable {
if (c.is_counter_update()) {
auto delta = c.counter_update_value();
return std::move(value).start_value_counter_cell_update()
.write_delta(delta)
.end_counter_cell_update();
} else {
counter_cell_view ccv(c);
auto shards = std::move(value).start_value_counter_cell_full()
.start_shards();
for (auto csv : ccv.shards()) {
shards.add_shards(counter_shard(csv));
}
return std::move(shards).end_shards().end_counter_cell_full();
}
}().end_counter_cell();
}
template<typename Writer>
auto write_expiring_cell(Writer&& writer, atomic_cell_view c)
{
return std::move(writer).write_ttl(c.ttl())
.write_expiry(c.expiry())
.start_c()
.write_created_at(c.timestamp())
.write_value(c.value())
.end_c()
.end_expiring_cell();
}
template<typename Writer>
auto write_dead_cell(Writer&& writer, atomic_cell_view c)
{
return std::move(writer).start_tomb()
.write_timestamp(c.timestamp())
.write_deletion_time(c.deletion_time())
.end_tomb()
.end_dead_cell();
}
template<typename Writer>
auto write_collection_cell(Writer&& collection_writer, collection_mutation_view cmv, const column_definition& def)
{
auto&& ctype = static_pointer_cast<const collection_type_impl>(def.type);
auto m_view = ctype->deserialize_mutation_form(cmv);
auto cells_writer = std::move(collection_writer).write_tomb(m_view.tomb).start_elements();
for (auto&& c : m_view.cells) {
auto cell_writer = cells_writer.add().write_key(c.first);
if (!c.second.is_live()) {
write_dead_cell(std::move(cell_writer).start_value_dead_cell(), c.second).end_collection_element();
} else if (c.second.is_live_and_has_ttl()) {
write_expiring_cell(std::move(cell_writer).start_value_expiring_cell(), c.second).end_collection_element();
} else {
write_live_cell(std::move(cell_writer).start_value_live_cell(), c.second).end_collection_element();
}
}
return std::move(cells_writer).end_elements().end_collection_cell();
}
template<typename Writer>
auto write_row_cells(Writer&& writer, const row& r, const schema& s, column_kind kind)
{
auto column_writer = std::move(writer).start_columns();
r.for_each_cell([&] (column_id id, const atomic_cell_or_collection& cell) {
auto& def = s.column_at(kind, id);
auto cell_or_collection_writer = column_writer.add().write_id(id);
if (def.is_atomic()) {
auto&& c = cell.as_atomic_cell();
auto cell_writer = std::move(cell_or_collection_writer).start_c_variant();
if (!c.is_live()) {
write_dead_cell(std::move(cell_writer).start_variant_dead_cell(), c).end_variant().end_column();
} else if (def.is_counter()) {
write_counter_cell(std::move(cell_writer).start_variant_counter_cell(), c).end_variant().end_column();
} else if (c.is_live_and_has_ttl()) {
write_expiring_cell(std::move(cell_writer).start_variant_expiring_cell(), c).end_variant().end_column();
} else {
write_live_cell(std::move(cell_writer).start_variant_live_cell(), c).end_variant().end_column();
}
} else {
write_collection_cell(std::move(cell_or_collection_writer).start_c_collection_cell(), cell.as_collection_mutation(), def).end_column();
}
});
return std::move(column_writer).end_columns();
}
template<typename Writer>
auto write_row_marker(Writer&& writer, const row_marker& marker)
{
if (marker.is_missing()) {
return std::move(writer).start_marker_no_marker().end_no_marker();
} else if (!marker.is_live()) {
return std::move(writer).start_marker_dead_marker()
.start_tomb()
.write_timestamp(marker.timestamp())
.write_deletion_time(marker.deletion_time())
.end_tomb()
.end_dead_marker();
} else if (marker.is_expiring()) {
return std::move(writer).start_marker_expiring_marker()
.start_lm()
.write_created_at(marker.timestamp())
.end_lm()
.write_ttl(marker.ttl())
.write_expiry(marker.expiry())
.end_expiring_marker();
} else {
return std::move(writer).start_marker_live_marker()
.write_created_at(marker.timestamp())
.end_live_marker();
}
}
}
template <typename RowTombstones>
static void write_tombstones(const schema& s, RowTombstones& row_tombstones, const range_tombstone_list& rt_list)
{
if (service::get_local_storage_service().cluster_supports_range_tombstones()) {
for (auto&& rt : rt_list) {
row_tombstones.add().write_start(rt.start).write_tomb(rt.tomb).write_start_kind(rt.start_kind)
.write_end(rt.end).write_end_kind(rt.end_kind).end_range_tombstone();
}
} else {
range_tombstone_to_prefix_tombstone_converter m;
for (auto&& rt : rt_list) {
auto prefix = m.convert(s, rt);
if (prefix) {
row_tombstones.add().write_start(*prefix).write_tomb(rt.tomb).write_start_kind(bound_kind::incl_start)
.write_end(*prefix).write_end_kind(bound_kind::incl_end).end_range_tombstone();
}
}
m.verify_no_open_tombstones();
}
}
template<typename Writer>
void mutation_partition_serializer::write_serialized(Writer&& writer, const schema& s, const mutation_partition& mp)
{
auto srow_writer = std::move(writer).write_tomb(mp.partition_tombstone()).start_static_row();
auto row_tombstones = write_row_cells(std::move(srow_writer), mp.static_row(), s, column_kind::static_column).end_static_row().start_range_tombstones();
write_tombstones(s, row_tombstones, mp.row_tombstones());
auto clustering_rows = std::move(row_tombstones).end_range_tombstones().start_rows();
for (auto&& cr : mp.clustered_rows()) {
auto marker_writer = clustering_rows.add().write_key(cr.key());
auto deleted_at_writer = write_row_marker(std::move(marker_writer), cr.row().marker());
auto&& dt = cr.row().deleted_at();
auto row_writer = std::move(deleted_at_writer).start_deleted_at()
.write_timestamp(dt.timestamp)
.write_deletion_time(dt.deletion_time)
.end_deleted_at()
.start_cells();
write_row_cells(std::move(row_writer), cr.row().cells(), s, column_kind::regular_column).end_cells().end_deletable_row();
}
std::move(clustering_rows).end_rows().end_mutation_partition();
}
mutation_partition_serializer::mutation_partition_serializer(const schema& schema, const mutation_partition& p)
: _schema(schema), _p(p)
{ }
void
mutation_partition_serializer::write(bytes_ostream& out) const {
write(ser::writer_of_mutation_partition<bytes_ostream>(out));
}
void mutation_partition_serializer::write(ser::writer_of_mutation_partition<bytes_ostream>&& wr) const
{
write_serialized(std::move(wr), _schema, _p);
}
void serialize_mutation_fragments(const schema& s, tombstone partition_tombstone,
stdx::optional<static_row> sr, range_tombstone_list rts,
std::deque<clustering_row> crs, ser::writer_of_mutation_partition<bytes_ostream>&& wr)
{
auto srow_writer = std::move(wr).write_tomb(partition_tombstone).start_static_row();
auto row_tombstones = [&] {
if (sr) {
return write_row_cells(std::move(srow_writer), sr->cells(), s, column_kind::static_column).end_static_row().start_range_tombstones();
} else {
return std::move(srow_writer).start_columns().end_columns().end_static_row().start_range_tombstones();
}
}();
sr = { };
write_tombstones(s, row_tombstones, rts);
rts.clear();
auto clustering_rows = std::move(row_tombstones).end_range_tombstones().start_rows();
while (!crs.empty()) {
auto& cr = crs.front();
auto marker_writer = clustering_rows.add().write_key(cr.key());
auto deleted_at_writer = write_row_marker(std::move(marker_writer), cr.marker());
auto&& dt = cr.tomb();
auto row_writer = std::move(deleted_at_writer).start_deleted_at()
.write_timestamp(dt.timestamp)
.write_deletion_time(dt.deletion_time)
.end_deleted_at()
.start_cells();
write_row_cells(std::move(row_writer), cr.cells(), s, column_kind::regular_column).end_cells().end_deletable_row();
crs.pop_front();
}
std::move(clustering_rows).end_rows().end_mutation_partition();
}