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The Apache Cassandra Project develops a highly scalable second-generation distributed database, bringing together Dynamo's fully distributed design and Bigtable's ColumnFamily-based data model.
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
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package org.apache.cassandra.dht.tokenallocator;
import java.util.Map;
import java.util.NavigableMap;
import com.google.common.collect.Maps;
import org.apache.cassandra.dht.IPartitioner;
import org.apache.cassandra.dht.Token;
public abstract class TokenAllocatorBase implements TokenAllocator
{
final NavigableMap sortedTokens;
final ReplicationStrategy strategy;
final IPartitioner partitioner;
protected TokenAllocatorBase(NavigableMap sortedTokens,
ReplicationStrategy strategy,
IPartitioner partitioner)
{
this.sortedTokens = sortedTokens;
this.strategy = strategy;
this.partitioner = partitioner;
}
public abstract int getReplicas();
protected Map> createUnitInfos(Map