1cbe54a9cf
To facilitate preempting of long running loops if needed. Signed-off-by: Benny Halevy <bhalevy@scylladb.com>
110 lines
3.8 KiB
C++
110 lines
3.8 KiB
C++
/*
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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* Modified by ScyllaDB
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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 "gms/inet_address.hh"
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#include "locator/token_metadata.hh"
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#include "dht/i_partitioner.hh"
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#include <unordered_set>
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#include "database_fwd.hh"
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#include "streaming/stream_reason.hh"
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#include <seastar/core/distributed.hh>
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#include <seastar/core/abort_source.hh>
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namespace dht {
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class boot_strapper {
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using inet_address = gms::inet_address;
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using token_metadata = locator::token_metadata;
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using token_metadata_ptr = locator::token_metadata_ptr;
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using token = dht::token;
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distributed<database>& _db;
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abort_source& _abort_source;
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/* endpoint that needs to be bootstrapped */
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inet_address _address;
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/* token of the node being bootstrapped. */
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std::unordered_set<token> _tokens;
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const token_metadata_ptr _token_metadata_ptr;
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public:
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boot_strapper(distributed<database>& db, abort_source& abort_source, inet_address addr, std::unordered_set<token> tokens, const token_metadata_ptr tmptr)
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: _db(db)
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, _abort_source(abort_source)
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, _address(addr)
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, _tokens(tokens)
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, _token_metadata_ptr(std::move(tmptr)) {
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}
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future<> bootstrap(streaming::stream_reason reason);
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/**
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* if initialtoken was specified, use that (split on comma).
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* otherwise, if num_tokens == 1, pick a token to assume half the load of the most-loaded node.
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* else choose num_tokens tokens at random
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*/
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static std::unordered_set<token> get_bootstrap_tokens(const token_metadata_ptr tmptr, database& db);
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static std::unordered_set<token> get_random_tokens(const token_metadata_ptr tmptr, size_t num_tokens);
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#if 0
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public static class StringSerializer implements IVersionedSerializer<String>
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{
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public static final StringSerializer instance = new StringSerializer();
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public void serialize(String s, DataOutputPlus out, int version) throws IOException
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{
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out.writeUTF(s);
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}
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public String deserialize(DataInput in, int version) throws IOException
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{
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return in.readUTF();
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}
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public long serializedSize(String s, int version)
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{
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return TypeSizes.NATIVE.sizeof(s);
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}
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}
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#endif
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private:
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const token_metadata& get_token_metadata() {
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return *_token_metadata_ptr;
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}
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};
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} // namespace dht
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