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https://github.com/scylladb/scylladb.git
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8628ede009
When a token is calculated for stream_id, we check that the key is exactly 16 bytes long. If it's not - `minimum_token` is returned and client receives empty result. This used to be the expected behavior for empty keys; now it's extended to keys of any incorrect length. Fixes #6570
66 lines
1.9 KiB
C++
66 lines
1.9 KiB
C++
/*
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* Copyright (C) 2020 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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#include "cdc_partitioner.hh"
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#include "dht/token.hh"
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#include "schema.hh"
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#include "sstables/key.hh"
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#include "utils/class_registrator.hh"
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#include "cdc/generation.hh"
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#include "keys.hh"
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static const sstring cdc_partitioner_name = "com.scylladb.dht.CDCPartitioner";
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namespace cdc {
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const sstring cdc_partitioner::name() const {
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return cdc_partitioner_name;
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}
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static dht::token to_token(int64_t value) {
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return dht::token(dht::token::kind::key, value);
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}
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static dht::token to_token(bytes_view key) {
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// Key should be 16 B long, of which first 8 B are used for token calculation
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if (key.size() != 2*sizeof(int64_t)) {
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return dht::minimum_token();
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}
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return to_token(stream_id::token_from_bytes(key));
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}
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dht::token
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cdc_partitioner::get_token(const sstables::key_view& key) const {
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return to_token(bytes_view(key));
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}
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dht::token
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cdc_partitioner::get_token(const schema& s, partition_key_view key) const {
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auto exploded_key = key.explode(s);
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return to_token(exploded_key[0]);
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}
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using registry = class_registrator<dht::i_partitioner, cdc_partitioner>;
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static registry registrator(cdc_partitioner_name);
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static registry registrator_short_name("CDCPartitioner");
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}
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