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* 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
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*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
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package org.apache.cassandra.locator;
import static org.junit.Assert.*;
import java.util.Arrays;
import java.util.List;
import java.util.ArrayList;
import java.util.Collection;
import org.apache.cassandra.config.DatabaseDescriptor;
import org.apache.cassandra.gms.ApplicationState;
import org.apache.cassandra.service.StorageServiceAccessor;
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.service.StorageService;
import java.net.InetAddress;
import java.net.UnknownHostException;
public class RackUnawareStrategyTest
{
@Test
public void tryBogusTable()
{
AbstractReplicationStrategy rs = StorageService.instance.getReplicationStrategy("Keyspace1");
assertNotNull(rs);
try
{
rs = StorageService.instance.getReplicationStrategy("SomeBogusTableThatDoesntExist");
throw new AssertionError("SS.getReplicationStrategy() should have thrown a RuntimeException.");
}
catch (RuntimeException ex)
{
// This exception should be thrown.
}
}
@Test
public void testBigIntegerEndpoints() throws UnknownHostException
{
TokenMetadata tmd = new TokenMetadata();
AbstractReplicationStrategy strategy = new RackUnawareStrategy(tmd, null);
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)));
}
for (String table : DatabaseDescriptor.getNonSystemTables())
testGetEndpoints(tmd, strategy, endPointTokens.toArray(new Token[0]), keyTokens.toArray(new Token[0]), table);
}
@Test
public void testStringEndpoints() throws UnknownHostException
{
TokenMetadata tmd = new TokenMetadata();
IPartitioner partitioner = new OrderPreservingPartitioner();
AbstractReplicationStrategy strategy = new RackUnawareStrategy(tmd, null);
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.getToken(String.valueOf((char)('a' + i * 2 + 1))));
}
for (String table : DatabaseDescriptor.getNonSystemTables())
testGetEndpoints(tmd, strategy, endPointTokens.toArray(new Token[0]), keyTokens.toArray(new Token[0]), table);
}
// 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 testGetEndpoints(TokenMetadata tmd, AbstractReplicationStrategy strategy, Token[] endPointTokens, Token[] keyTokens, String table) throws UnknownHostException
{
List<InetAddress> hosts = new ArrayList<InetAddress>();
for (int i = 0; i < endPointTokens.length; i++)
{
InetAddress ep = InetAddress.getByName("127.0.0." + String.valueOf(i + 1));
tmd.updateNormalToken(endPointTokens[i], ep);
hosts.add(ep);
}
for (int i = 0; i < keyTokens.length; i++)
{
List<InetAddress> endPoints = strategy.getNaturalEndpoints(keyTokens[i], table);
assertEquals(DatabaseDescriptor.getReplicationFactor(table), endPoints.size());
for (int j = 0; j < endPoints.size(); j++)
{
assertEquals(endPoints.get(j), hosts.get((i + j + 1) % hosts.size()));
}
}
}
@Test
public void testGetEndpointsDuringBootstrap() throws UnknownHostException
{
// the token difference will be RING_SIZE * 2.
final int RING_SIZE = 10;
TokenMetadata tmd = new TokenMetadata();
TokenMetadata oldTmd = StorageServiceAccessor.setTokenMetadata(tmd);
AbstractReplicationStrategy strategy = new RackUnawareStrategy(tmd, null);
Token[] endPointTokens = new Token[RING_SIZE];
Token[] keyTokens = new Token[RING_SIZE];
for (int i = 0; i < RING_SIZE; i++)
{
endPointTokens[i] = new BigIntegerToken(String.valueOf(RING_SIZE * 2 * i));
keyTokens[i] = new BigIntegerToken(String.valueOf(RING_SIZE * 2 * i + RING_SIZE));
}
List<InetAddress> hosts = new ArrayList<InetAddress>();
for (int i = 0; i < endPointTokens.length; i++)
{
InetAddress ep = InetAddress.getByName("127.0.0." + String.valueOf(i + 1));
tmd.updateNormalToken(endPointTokens[i], ep);
hosts.add(ep);
}
// bootstrap at the end of the ring
Token bsToken = new BigIntegerToken(String.valueOf(210));
InetAddress bootstrapEndPoint = InetAddress.getByName("127.0.0.11");
tmd.addBootstrapToken(bsToken, bootstrapEndPoint);
for (String table : DatabaseDescriptor.getNonSystemTables())
{
StorageService.calculatePendingRanges(strategy, table);
int replicationFactor = DatabaseDescriptor.getReplicationFactor(table);
for (int i = 0; i < keyTokens.length; i++)
{
Collection<InetAddress> endPoints = strategy.getWriteEndpoints(keyTokens[i], table, strategy.getNaturalEndpoints(keyTokens[i], table));
assertTrue(endPoints.size() >= replicationFactor);
for (int j = 0; j < replicationFactor; j++)
{
//Check that the old nodes are definitely included
assertTrue(endPoints.contains(hosts.get((i + j + 1) % hosts.size())));
}
// bootstrapEndPoint should be in the endPoints for i in MAX-RF to MAX, but not in any earlier ep.
if (i < RING_SIZE - replicationFactor)
assertFalse(endPoints.contains(bootstrapEndPoint));
else
assertTrue(endPoints.contains(bootstrapEndPoint));
}
}
StorageServiceAccessor.setTokenMetadata(oldTmd);
}
}