14dfa3c0c3
The original idea of prefixing alternator keyspace names with 'a#' leveraged the fact that '#' is not a legal CQL character for keyspace names. The idea is flawed though, since '#' proved to confuse existing Scylla tools (e.g. nodetool). Thus, the prefix is changed to more orthodox 'alternator_'. It is possible to create such keyspaces with CQL as well, but then the alternator CreateTable request would simply fail, because the keyspace already exists, which is graceful enough. Hiding alternator keyspaces and tables from CQL is another issue, but there are other ways to distinguish them than a non-standard prefix, e.g. tags. Fixes #5883
78 lines
3.7 KiB
C++
78 lines
3.7 KiB
C++
/*
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* Copyright 2019 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 Affero 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 <seastar/core/future.hh>
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#include <seastar/http/httpd.hh>
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#include "seastarx.hh"
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#include <seastar/json/json_elements.hh>
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#include <seastar/core/sharded.hh>
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#include "service/storage_proxy.hh"
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#include "service/migration_manager.hh"
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#include "service/client_state.hh"
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#include "alternator/error.hh"
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#include "stats.hh"
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namespace alternator {
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class executor : public peering_sharded_service<executor> {
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service::storage_proxy& _proxy;
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service::migration_manager& _mm;
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public:
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using client_state = service::client_state;
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using request_return_type = std::variant<json::json_return_type, api_error>;
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stats _stats;
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static constexpr auto ATTRS_COLUMN_NAME = ":attrs";
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static constexpr auto KEYSPACE_NAME_PREFIX = "alternator_";
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executor(service::storage_proxy& proxy, service::migration_manager& mm) : _proxy(proxy), _mm(mm) {}
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future<request_return_type> create_table(client_state& client_state, tracing::trace_state_ptr trace_state, std::string content);
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future<request_return_type> describe_table(client_state& client_state, tracing::trace_state_ptr trace_state, std::string content);
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future<request_return_type> delete_table(client_state& client_state, tracing::trace_state_ptr trace_state, std::string content);
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future<request_return_type> put_item(client_state& client_state, tracing::trace_state_ptr trace_state, std::string content);
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future<request_return_type> get_item(client_state& client_state, tracing::trace_state_ptr trace_state, std::string content);
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future<request_return_type> delete_item(client_state& client_state, tracing::trace_state_ptr trace_state, std::string content);
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future<request_return_type> update_item(client_state& client_state, tracing::trace_state_ptr trace_state, std::string content);
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future<request_return_type> list_tables(client_state& client_state, std::string content);
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future<request_return_type> scan(client_state& client_state, tracing::trace_state_ptr trace_state, std::string content);
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future<request_return_type> describe_endpoints(client_state& client_state, std::string content, std::string host_header);
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future<request_return_type> batch_write_item(client_state& client_state, tracing::trace_state_ptr trace_state, std::string content);
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future<request_return_type> batch_get_item(client_state& client_state, tracing::trace_state_ptr trace_state, std::string content);
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future<request_return_type> query(client_state& client_state, tracing::trace_state_ptr trace_state, std::string content);
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future<request_return_type> tag_resource(client_state& client_state, std::string content);
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future<request_return_type> untag_resource(client_state& client_state, std::string content);
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future<request_return_type> list_tags_of_resource(client_state& client_state, std::string content);
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future<> start();
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future<> stop() { return make_ready_future<>(); }
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future<> create_keyspace(std::string_view keyspace_name);
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static tracing::trace_state_ptr maybe_trace_query(client_state& client_state, sstring_view op, sstring_view query);
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};
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}
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