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https://github.com/scylladb/scylladb.git
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92a7b16cba
This field will replace max size which is currently passed once per established rpc connection via the CLIENT_ID verb and stored as an auxiliary value on the client_info. For now it is unused, but we update all sites creating a read command to pass the correct value to it. In the next patch we will phase out the old max size and use this field to pass max size on each verb instead.
96 lines
4.1 KiB
C++
96 lines
4.1 KiB
C++
/*
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* Copyright (C) 2019 pengjian.uestc @ gmail.com
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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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#include "redis/query_utils.hh"
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#include "redis/options.hh"
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#include "timeout_config.hh"
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#include "service/client_state.hh"
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#include "service/storage_proxy.hh"
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#include "dht/i_partitioner.hh"
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#include "partition_slice_builder.hh"
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#include "query-result-reader.hh"
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#include "gc_clock.hh"
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#include "service_permit.hh"
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#include "redis/keyspace_utils.hh"
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namespace redis {
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class strings_result_builder {
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lw_shared_ptr<strings_result> _data;
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const query::partition_slice& _partition_slice;
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const schema_ptr _schema;
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private:
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void add_cell(const column_definition& col, const std::optional<query::result_atomic_cell_view>& cell)
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{
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if (cell) {
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cell->value().with_linearized([this, &col, &cell] (bytes_view cell_view) {
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auto&& dv = col.type->deserialize_value(cell_view);
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auto&& d = dv.serialize_nonnull();
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_data->_result = std::move(d);
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if (cell->expiry().has_value()) {
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_data->_ttl = cell->expiry().value() - gc_clock::now();
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}
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_data->_has_result = true;
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});
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}
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}
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public:
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strings_result_builder(lw_shared_ptr<strings_result> data, const schema_ptr schema, const query::partition_slice& ps)
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: _data(data)
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, _partition_slice(ps)
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, _schema(schema)
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{
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}
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void accept_new_partition(const partition_key& key, uint32_t row_count) {}
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void accept_new_partition(uint32_t row_count) {}
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void accept_new_row(const clustering_key& key, const query::result_row_view& static_row, const query::result_row_view& row)
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{
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auto row_iterator = row.iterator();
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for (auto&& id : _partition_slice.regular_columns) {
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add_cell(_schema->regular_column_at(id), row_iterator.next_atomic_cell());
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}
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}
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void accept_new_row(const query::result_row_view& static_row, const query::result_row_view& row) {}
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void accept_partition_end(const query::result_row_view& static_row) {}
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};
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future<lw_shared_ptr<strings_result>> read_strings(service::storage_proxy& proxy, const redis_options& options, const bytes& key, service_permit permit) {
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auto schema = get_schema(proxy, options.get_keyspace_name(), redis::STRINGs);
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auto ps = partition_slice_builder(*schema).build();
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const auto max_result_size = proxy.get_max_result_size(ps);
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query::read_command cmd(schema->id(), schema->version(), ps, 1, gc_clock::now(), std::nullopt, 1, utils::UUID(), query::is_first_page::no, max_result_size);
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auto pkey = partition_key::from_single_value(*schema, key);
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auto partition_range = dht::partition_range::make_singular(dht::decorate_key(*schema, std::move(pkey)));
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dht::partition_range_vector partition_ranges;
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partition_ranges.emplace_back(std::move(partition_range));
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auto read_consistency_level = options.get_read_consistency_level();
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db::timeout_clock::time_point timeout = db::timeout_clock::now() + options.get_read_timeout();
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return proxy.query(schema, make_lw_shared(std::move(cmd)), std::move(partition_ranges), read_consistency_level, {timeout, permit, service::client_state::for_internal_calls()}).then([ps, schema] (auto qr) {
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return query::result_view::do_with(*qr.query_result, [&] (query::result_view v) {
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auto pd = make_lw_shared<strings_result>();
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v.consume(ps, strings_result_builder(pd, schema, ps));
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return pd;
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});
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});
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}
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}
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