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fcb8d040e8
Instead of lengthy blurbs, switch to single-line, machine-readable standardized (https://spdx.dev) license identifiers. The Linux kernel switched long ago, so there is strong precedent. Three cases are handled: AGPL-only, Apache-only, and dual licensed. For the latter case, I chose (AGPL-3.0-or-later and Apache-2.0), reasoning that our changes are extensive enough to apply our license. The changes we applied mechanically with a script, except to licenses/README.md. Closes #9937
83 lines
2.4 KiB
C++
83 lines
2.4 KiB
C++
/*
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* Copyright (C) 2015-present ScyllaDB
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*/
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/*
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* SPDX-License-Identifier: AGPL-3.0-or-later
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*/
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#include <algorithm>
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#include <seastar/core/coroutine.hh>
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#include <seastar/coroutine/maybe_yield.hh>
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#include "simple_strategy.hh"
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#include "utils/class_registrator.hh"
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#include <boost/algorithm/string.hpp>
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#include "utils/sequenced_set.hh"
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namespace locator {
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simple_strategy::simple_strategy(snitch_ptr& snitch, const replication_strategy_config_options& config_options) :
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abstract_replication_strategy(snitch, config_options, replication_strategy_type::simple) {
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for (auto& config_pair : config_options) {
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auto& key = config_pair.first;
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auto& val = config_pair.second;
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if (boost::iequals(key, "replication_factor")) {
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validate_replication_factor(val);
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_replication_factor = std::stol(val);
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break;
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}
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}
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}
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future<inet_address_vector_replica_set> simple_strategy::calculate_natural_endpoints(const token& t, const token_metadata& tm) const {
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const std::vector<token>& tokens = tm.sorted_tokens();
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if (tokens.empty()) {
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co_return inet_address_vector_replica_set();
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}
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size_t replicas = _replication_factor;
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utils::sequenced_set<inet_address> endpoints;
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endpoints.reserve(replicas);
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for (auto& token : tm.ring_range(t)) {
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if (endpoints.size() == replicas) {
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break;
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}
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auto ep = tm.get_endpoint(token);
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assert(ep);
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endpoints.push_back(*ep);
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co_await coroutine::maybe_yield();
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}
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co_return boost::copy_range<inet_address_vector_replica_set>(endpoints.get_vector());
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}
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size_t simple_strategy::get_replication_factor(const token_metadata&) const {
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return _replication_factor;
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}
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void simple_strategy::validate_options() const {
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auto it = _config_options.find("replication_factor");
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if (it == _config_options.end()) {
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throw exceptions::configuration_exception("SimpleStrategy requires a replication_factor strategy option.");
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}
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validate_replication_factor(it->second);
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}
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std::optional<std::set<sstring>>simple_strategy::recognized_options(const topology&) const {
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return {{ "replication_factor" }};
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}
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using registry = class_registrator<abstract_replication_strategy, simple_strategy, snitch_ptr&, const replication_strategy_config_options&>;
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static registry registrator("org.apache.cassandra.locator.SimpleStrategy");
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static registry registrator_short_name("SimpleStrategy");
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}
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