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a6a65abc3c
In order to minimize the use of exceptions during normal operations, each request handler is now able to return either a proper JSON value, or an instance of api_error, which indicates that something went wrong, but without having to throw, catch and rethrow C++ exceptions. This is especially important for conditional updates, since it's expected to be common to return ConditionalCheckFailedException. Message-Id: <d8996a0a270eb0d9db8fdcfb7046930b96781e69.1579515640.git.sarna@scylladb.com>
75 lines
3.0 KiB
C++
75 lines
3.0 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 = "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, std::string content);
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future<request_return_type> describe_table(client_state& client_state, std::string content);
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future<request_return_type> delete_table(client_state& client_state, std::string content);
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future<request_return_type> put_item(client_state& client_state, std::string content);
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future<request_return_type> get_item(client_state& client_state, std::string content);
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future<request_return_type> delete_item(client_state& client_state, std::string content);
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future<request_return_type> update_item(client_state& client_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, 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, std::string content);
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future<request_return_type> batch_get_item(client_state& client_state, std::string content);
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future<request_return_type> query(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<> maybe_create_keyspace();
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static void 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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