c5e4bf51bd
Move mutation-related files to a new mutation/ directory. The names are kept in the global namespace to reduce churn; the names are unambiguous in any case. mutation_reader remains in the readers/ module. mutation_partition_v2.cc was missing from CMakeLists.txt; it's added in this patch. This is a step forward towards librarization or modularization of the source base. Closes #12788
237 lines
9.3 KiB
C++
237 lines
9.3 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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#include "atomic_cell.hh"
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#include "atomic_cell_or_collection.hh"
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#include "counters.hh"
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#include "types.hh"
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atomic_cell atomic_cell::make_dead(api::timestamp_type timestamp, gc_clock::time_point deletion_time) {
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return atomic_cell_type::make_dead(timestamp, deletion_time);
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}
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atomic_cell atomic_cell::make_live(const abstract_type& type, api::timestamp_type timestamp, bytes_view value, atomic_cell::collection_member cm) {
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return atomic_cell_type::make_live(timestamp, single_fragment_range(value));
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}
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atomic_cell atomic_cell::make_live(const abstract_type& type, api::timestamp_type timestamp, managed_bytes_view value, atomic_cell::collection_member cm) {
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return atomic_cell_type::make_live(timestamp, fragment_range(value));
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}
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atomic_cell atomic_cell::make_live(const abstract_type& type, api::timestamp_type timestamp, ser::buffer_view<bytes_ostream::fragment_iterator> value, atomic_cell::collection_member cm) {
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return atomic_cell_type::make_live(timestamp, value);
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}
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atomic_cell atomic_cell::make_live(const abstract_type& type, api::timestamp_type timestamp, const fragmented_temporary_buffer::view& value, collection_member cm)
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{
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return atomic_cell_type::make_live(timestamp, value);
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}
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atomic_cell atomic_cell::make_live(const abstract_type& type, api::timestamp_type timestamp, bytes_view value,
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gc_clock::time_point expiry, gc_clock::duration ttl, atomic_cell::collection_member cm) {
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return atomic_cell_type::make_live(timestamp, single_fragment_range(value), expiry, ttl);
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}
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atomic_cell atomic_cell::make_live(const abstract_type& type, api::timestamp_type timestamp, managed_bytes_view value,
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gc_clock::time_point expiry, gc_clock::duration ttl, atomic_cell::collection_member cm) {
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return atomic_cell_type::make_live(timestamp, fragment_range(value), expiry, ttl);
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}
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atomic_cell atomic_cell::make_live(const abstract_type& type, api::timestamp_type timestamp, ser::buffer_view<bytes_ostream::fragment_iterator> value,
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gc_clock::time_point expiry, gc_clock::duration ttl, atomic_cell::collection_member cm) {
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return atomic_cell_type::make_live(timestamp, value, expiry, ttl);
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}
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atomic_cell atomic_cell::make_live(const abstract_type& type, api::timestamp_type timestamp, const fragmented_temporary_buffer::view& value,
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gc_clock::time_point expiry, gc_clock::duration ttl, collection_member cm)
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{
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return atomic_cell_type::make_live(timestamp, value, expiry, ttl);
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}
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atomic_cell atomic_cell::make_live_counter_update(api::timestamp_type timestamp, int64_t value) {
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return atomic_cell_type::make_live_counter_update(timestamp, value);
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}
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atomic_cell atomic_cell::make_live_uninitialized(const abstract_type& type, api::timestamp_type timestamp, size_t size) {
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return atomic_cell_type::make_live_uninitialized(timestamp, size);
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}
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atomic_cell::atomic_cell(const abstract_type& type, atomic_cell_view other)
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: _data(other._view) {
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set_view(_data);
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}
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// Based on:
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// - org.apache.cassandra.db.AbstractCell#reconcile()
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// - org.apache.cassandra.db.BufferExpiringCell#reconcile()
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// - org.apache.cassandra.db.BufferDeletedCell#reconcile()
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std::strong_ordering
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compare_atomic_cell_for_merge(atomic_cell_view left, atomic_cell_view right) {
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if (left.timestamp() != right.timestamp()) {
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return left.timestamp() <=> right.timestamp();
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}
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if (left.is_live() != right.is_live()) {
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return left.is_live() ? std::strong_ordering::less : std::strong_ordering::greater;
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}
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if (left.is_live()) {
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auto c = compare_unsigned(left.value(), right.value()) <=> 0;
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if (c != 0) {
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return c;
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}
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if (left.is_live_and_has_ttl() != right.is_live_and_has_ttl()) {
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// prefer expiring cells.
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return left.is_live_and_has_ttl() ? std::strong_ordering::greater : std::strong_ordering::less;
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}
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if (left.is_live_and_has_ttl()) {
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if (left.expiry() != right.expiry()) {
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return left.expiry() <=> right.expiry();
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} else {
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// prefer the cell that was written later,
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// so it survives longer after it expires, until purged.
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return right.ttl() <=> left.ttl();
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}
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}
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} else {
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// Both are deleted
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// Origin compares big-endian serialized deletion time. That's because it
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// delegates to AbstractCell.reconcile() which compares values after
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// comparing timestamps, which in case of deleted cells will hold
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// serialized expiry.
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return (uint64_t) left.deletion_time().time_since_epoch().count()
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<=> (uint64_t) right.deletion_time().time_since_epoch().count();
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}
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return std::strong_ordering::equal;
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}
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atomic_cell_or_collection atomic_cell_or_collection::copy(const abstract_type& type) const {
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if (_data.empty()) {
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return atomic_cell_or_collection();
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}
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return atomic_cell_or_collection(managed_bytes(_data));
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}
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atomic_cell_or_collection::atomic_cell_or_collection(const abstract_type& type, atomic_cell_view acv)
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: _data(acv._view)
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{
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}
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bool atomic_cell_or_collection::equals(const abstract_type& type, const atomic_cell_or_collection& other) const
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{
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if (_data.empty() || other._data.empty()) {
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return _data.empty() && other._data.empty();
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}
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if (type.is_atomic()) {
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auto a = atomic_cell_view::from_bytes(type, _data);
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auto b = atomic_cell_view::from_bytes(type, other._data);
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if (a.timestamp() != b.timestamp()) {
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return false;
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}
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if (a.is_live() != b.is_live()) {
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return false;
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}
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if (a.is_live()) {
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if (a.is_counter_update() != b.is_counter_update()) {
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return false;
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}
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if (a.is_counter_update()) {
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return a.counter_update_value() == b.counter_update_value();
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}
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if (a.is_live_and_has_ttl() != b.is_live_and_has_ttl()) {
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return false;
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}
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if (a.is_live_and_has_ttl()) {
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if (a.ttl() != b.ttl() || a.expiry() != b.expiry()) {
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return false;
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}
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}
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return a.value() == b.value();
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}
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return a.deletion_time() == b.deletion_time();
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} else {
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return as_collection_mutation().data == other.as_collection_mutation().data;
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}
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}
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size_t atomic_cell_or_collection::external_memory_usage(const abstract_type& t) const
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{
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return _data.external_memory_usage();
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}
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std::ostream&
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operator<<(std::ostream& os, const atomic_cell_view& acv) {
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if (acv.is_live()) {
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fmt::print(os, "atomic_cell{{{},ts={:d},expiry={:d},ttl={:d}}}",
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acv.is_counter_update()
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? "counter_update_value=" + to_sstring(acv.counter_update_value())
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: to_hex(to_bytes(acv.value())),
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acv.timestamp(),
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acv.is_live_and_has_ttl() ? acv.expiry().time_since_epoch().count() : -1,
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acv.is_live_and_has_ttl() ? acv.ttl().count() : 0);
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} else {
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fmt::print(os, "atomic_cell{{DEAD,ts={:d},deletion_time={:d}}}",
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acv.timestamp(), acv.deletion_time().time_since_epoch().count());
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}
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return os;
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}
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std::ostream&
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operator<<(std::ostream& os, const atomic_cell& ac) {
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return os << atomic_cell_view(ac);
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}
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std::ostream&
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operator<<(std::ostream& os, const atomic_cell_view::printer& acvp) {
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auto& type = acvp._type;
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auto& acv = acvp._cell;
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if (acv.is_live()) {
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std::ostringstream cell_value_string_builder;
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if (type.is_counter()) {
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if (acv.is_counter_update()) {
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cell_value_string_builder << "counter_update_value=" << acv.counter_update_value();
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} else {
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cell_value_string_builder << "shards: ";
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auto ccv = counter_cell_view(acv);
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cell_value_string_builder << ::join(", ", ccv.shards());
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}
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} else {
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cell_value_string_builder << type.to_string(to_bytes(acv.value()));
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}
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fmt::print(os, "atomic_cell{{{},ts={:d},expiry={:d},ttl={:d}}}",
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cell_value_string_builder.str(),
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acv.timestamp(),
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acv.is_live_and_has_ttl() ? acv.expiry().time_since_epoch().count() : -1,
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acv.is_live_and_has_ttl() ? acv.ttl().count() : 0);
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} else {
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fmt::print(os, "atomic_cell{{DEAD,ts={:d},deletion_time={:d}}}",
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acv.timestamp(), acv.deletion_time().time_since_epoch().count());
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}
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return os;
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}
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std::ostream&
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operator<<(std::ostream& os, const atomic_cell::printer& acp) {
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return operator<<(os, static_cast<const atomic_cell_view::printer&>(acp));
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}
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std::ostream& operator<<(std::ostream& os, const atomic_cell_or_collection::printer& p) {
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if (p._cell._data.empty()) {
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return os << "{ null atomic_cell_or_collection }";
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}
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os << "{ ";
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if (p._cdef.type->is_multi_cell()) {
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os << "collection ";
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auto cmv = p._cell.as_collection_mutation();
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os << collection_mutation_view::printer(*p._cdef.type, cmv);
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} else {
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os << atomic_cell_view::printer(*p._cdef.type, p._cell.as_atomic_cell(p._cdef));
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}
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return os << " }";
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}
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