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a9835ec128
I wanted to move caching_option.hh's content to .cc (so that it doesn't pull in rjson.hh everywhere), but for that, we must first make from_map() a non-template function. Luckily, it is only called with one parameter type, so just substitute that type for the template parameter. Closes #8406
121 lines
3.6 KiB
C++
121 lines
3.6 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 <seastar/core/sstring.hh>
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#include <boost/lexical_cast.hpp>
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#include <map>
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#include "exceptions/exceptions.hh"
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#include "utils/rjson.hh"
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#include "seastarx.hh"
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class schema;
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class caching_options {
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// For Origin, the default value for the row is "NONE". However, since our
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// row_cache will cache both keys and rows, we will default to ALL.
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//
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// FIXME: We don't yet make any changes to our caching policies based on
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// this (and maybe we shouldn't)
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static constexpr auto default_key = "ALL";
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static constexpr auto default_row = "ALL";
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sstring _key_cache;
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sstring _row_cache;
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bool _enabled = true;
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caching_options(sstring k, sstring r, bool enabled)
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: _key_cache(k), _row_cache(r), _enabled(enabled)
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{
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if ((k != "ALL") && (k != "NONE")) {
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throw exceptions::configuration_exception("Invalid key value: " + k);
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}
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if ((r == "ALL") || (r == "NONE")) {
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return;
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} else {
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try {
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boost::lexical_cast<unsigned long>(r);
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} catch (boost::bad_lexical_cast& e) {
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throw exceptions::configuration_exception("Invalid key value: " + r);
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}
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}
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}
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friend class schema;
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caching_options() : _key_cache(default_key), _row_cache(default_row) {}
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public:
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bool enabled() const {
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return _enabled;
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}
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std::map<sstring, sstring> to_map() const {
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std::map<sstring, sstring> res = {{ "keys", _key_cache },
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{ "rows_per_partition", _row_cache }};
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if (!_enabled) {
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res.insert({"enabled", "false"});
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}
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return res;
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}
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sstring to_sstring() const {
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return rjson::print(rjson::from_string_map(to_map()));
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}
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static caching_options get_disabled_caching_options() {
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return caching_options("NONE", "NONE", false);
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}
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static caching_options from_map(const std::map<sstring, sstring>& map) {
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sstring k = default_key;
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sstring r = default_row;
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bool e = true;
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for (auto& p : map) {
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if (p.first == "keys") {
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k = p.second;
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} else if (p.first == "rows_per_partition") {
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r = p.second;
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} else if (p.first == "enabled") {
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e = p.second == "true";
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} else {
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throw exceptions::configuration_exception(format("Invalid caching option: {}", p.first));
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}
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}
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return caching_options(k, r, e);
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}
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static caching_options from_sstring(const sstring& str) {
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return from_map(rjson::parse_to_map<std::map<sstring, sstring>>(str));
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}
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bool operator==(const caching_options& other) const {
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return _key_cache == other._key_cache && _row_cache == other._row_cache
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&& _enabled == other._enabled;
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}
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bool operator!=(const caching_options& other) const {
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return !(*this == other);
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}
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};
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