061ef16562
Having a varadic parameter being used in implicit sprint is not very readable + makes it less intuitive when suddenly system keyspace becomes more than one -> multiple sprints in the chain -> more confusion or more execution paths. Its not that horrible with some spread out sprint:s
73 lines
2.1 KiB
C++
73 lines
2.1 KiB
C++
/*
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* Copyright (C) 2015 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 <memory>
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#include "core/sharded.hh"
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#include "core/future.hh"
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#include "cql3/query_processor.hh"
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class database;
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namespace service {
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class storage_proxy;
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}
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namespace db {
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struct query_context {
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distributed<database>& _db;
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distributed<cql3::query_processor>& _qp;
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query_context(distributed<database>& db, distributed<cql3::query_processor>& qp) : _db(db), _qp(qp) {}
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template <typename... Args>
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future<::shared_ptr<cql3::untyped_result_set>> execute_cql(sstring req, Args&&... args) {
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return this->_qp.local().execute_internal(req, { data_value(std::forward<Args>(args))... });
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}
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database& db() {
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return _db.local();
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}
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service::storage_proxy& proxy() {
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return _qp.local().proxy().local();
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}
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api::timestamp_type next_timestamp() {
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return _qp.local().next_timestamp();
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}
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cql3::query_processor& qp() {
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return _qp.local();
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}
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};
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// This does not have to be thread local, because all cores will share the same context.
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extern std::unique_ptr<query_context> qctx;
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// Sometimes we are not concerned about system tables at all - for instance, when we are testing. In those cases, just pretend
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// we executed the query, and return an empty result
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template <typename... Args>
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static future<::shared_ptr<cql3::untyped_result_set>> execute_cql(sstring text, Args&&... args) {
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assert(qctx);
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return qctx->execute_cql(text, std::forward<Args>(args)...);
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}
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}
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