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* 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
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package org.apache.cassandra.locator;
import java.util.List;
import java.util.ArrayList;
import org.junit.Test;
import org.apache.cassandra.dht.IPartitioner;
import org.apache.cassandra.dht.RandomPartitioner;
import org.apache.cassandra.dht.BigIntegerToken;
import org.apache.cassandra.dht.Token;
import org.apache.cassandra.dht.OrderPreservingPartitioner;
import org.apache.cassandra.dht.StringToken;
import org.apache.cassandra.net.EndPoint;
public class RackUnawareStrategyTest
{
@Test
public void testBigIntegerStorageEndPoints()
{
TokenMetadata tmd = new TokenMetadata();
IPartitioner partitioner = new RandomPartitioner();
IReplicaPlacementStrategy strategy = new RackUnawareStrategy(tmd, partitioner, 3, 7000);
List<Token> endPointTokens = new ArrayList<Token>();
List<Token> keyTokens = new ArrayList<Token>();
for (int i = 0; i < 5; i++) {
endPointTokens.add(new BigIntegerToken(String.valueOf(10 * i)));
keyTokens.add(new BigIntegerToken(String.valueOf(10 * i + 5)));
}
testGetStorageEndPoints(tmd, strategy, endPointTokens.toArray(new Token[0]), keyTokens.toArray(new Token[0]));
}
@Test
public void testStringStorageEndPoints()
{
TokenMetadata tmd = new TokenMetadata();
IPartitioner partitioner = new OrderPreservingPartitioner();
IReplicaPlacementStrategy strategy = new RackUnawareStrategy(tmd, partitioner, 3, 7000);
List<Token> endPointTokens = new ArrayList<Token>();
List<Token> keyTokens = new ArrayList<Token>();
for (int i = 0; i < 5; i++) {
endPointTokens.add(new StringToken(String.valueOf((char)('a' + i * 2))));
keyTokens.add(partitioner.getInitialToken(String.valueOf((char)('a' + i * 2 + 1))));
}
testGetStorageEndPoints(tmd, strategy, endPointTokens.toArray(new Token[0]), keyTokens.toArray(new Token[0]));
}
// given a list of endpoint tokens, and a set of key tokens falling between the endpoint tokens,
// make sure that the Strategy picks the right endpoints for the keys.
private void testGetStorageEndPoints(TokenMetadata tmd, IReplicaPlacementStrategy strategy, Token[] endPointTokens, Token[] keyTokens)
{
List<EndPoint> hosts = new ArrayList<EndPoint>();
for (int i = 0; i < endPointTokens.length; i++)
{
EndPoint ep = new EndPoint("127.0.0." + String.valueOf(i + 1), 7001);
tmd.update(endPointTokens[i], ep);
hosts.add(ep);
}
for (int i = 0; i < keyTokens.length; i++)
{
EndPoint[] endPoints = strategy.getStorageEndPoints(keyTokens[i]);
assert endPoints.length == 3;
for (int j = 0; j < endPoints.length; j++)
{
assert endPoints[j] == hosts.get((i + j + 1) % hosts.size());
}
}
}
}