2953d3ebe0
`validate_options` needs to be extended with `topology` parameter, because NetworkTopologyStrategy needs to validate if every explicitly listed DC is really existing. I did cut corner a bit and trimmed the message thrown when it's not the case, just to avoid passing and extra parameter (ks name) to the `validate_options` function, as I find the longer message to be a bit redundant (the driver will receive info which KS modification failed). The tests that have been commented out in the previous commit have been restored.
48 lines
1.6 KiB
C++
48 lines
1.6 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: LicenseRef-ScyllaDB-Source-Available-1.0
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*/
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#include <algorithm>
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#include "local_strategy.hh"
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#include "utils/class_registrator.hh"
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#include "exceptions/exceptions.hh"
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namespace locator {
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local_strategy::local_strategy(replication_strategy_params params) :
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abstract_replication_strategy(params, replication_strategy_type::local) {
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_natural_endpoints_depend_on_token = false;
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}
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future<host_id_set> local_strategy::calculate_natural_endpoints(const token& t, const token_metadata& tm) const {
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return make_ready_future<host_id_set>(host_id_set{tm.get_topology().my_host_id()});
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}
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void local_strategy::validate_options(const gms::feature_service&, const locator::topology&) const {
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if (_uses_tablets) {
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throw exceptions::configuration_exception("LocalStrategy doesn't support tablet replication");
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}
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}
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size_t local_strategy::get_replication_factor(const token_metadata&) const {
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return 1;
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}
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sstring local_strategy::sanity_check_read_replicas(const effective_replication_map& erm, const host_id_vector_replica_set& read_replicas) const {
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if (read_replicas.size() > 1) {
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return seastar::format("local_strategy: the number of replicas for local_strategy is {}, cannot be higher than 1", read_replicas.size());
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}
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return {};
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}
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using registry = class_registrator<abstract_replication_strategy, local_strategy, replication_strategy_params>;
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static registry registrator("org.apache.cassandra.locator.LocalStrategy");
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static registry registrator_short_name("LocalStrategy");
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}
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