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* 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,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.cassandra.service;
import static org.junit.Assert.*;
import java.math.BigInteger;
import java.net.InetAddress;
import java.net.UnknownHostException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.UUID;
import java.util.concurrent.TimeUnit;
import org.apache.cassandra.SchemaLoader;
import org.apache.cassandra.db.SystemKeyspace;
import org.apache.cassandra.exceptions.ConfigurationException;
import org.apache.cassandra.config.KSMetaData;
import org.apache.cassandra.config.Schema;
import org.apache.cassandra.dht.BigIntegerToken;
import org.apache.cassandra.dht.IPartitioner;
import org.apache.cassandra.dht.RandomPartitioner;
import org.apache.cassandra.dht.Token;
import org.apache.cassandra.gms.ApplicationState;
import org.apache.cassandra.gms.Gossiper;
import org.apache.cassandra.gms.VersionedValue;
import org.apache.cassandra.locator.AbstractReplicationStrategy;
import org.apache.cassandra.locator.SimpleSnitch;
import org.apache.cassandra.locator.TokenMetadata;
import org.junit.AfterClass;
import org.junit.Before;
import org.junit.BeforeClass;
import org.junit.Test;
import com.google.common.util.concurrent.Uninterruptibles;
public class RelocateTest
{
private static final int TOKENS_PER_NODE = 256;
private static final int TOKEN_STEP = 10;
private static final IPartitioner<?> partitioner = new RandomPartitioner();
private static IPartitioner<?> oldPartitioner;
private static VersionedValue.VersionedValueFactory vvFactory;
private StorageService ss = StorageService.instance;
private TokenMetadata tmd = StorageService.instance.getTokenMetadata();
@Before
public void init()
{
tmd.clearUnsafe();
}
@BeforeClass
public static void setUp() throws Exception
{
oldPartitioner = StorageService.instance.setPartitionerUnsafe(partitioner);
SchemaLoader.loadSchema();
vvFactory = new VersionedValue.VersionedValueFactory(partitioner);
}
@AfterClass
public static void tearDown() throws Exception
{
StorageService.instance.setPartitionerUnsafe(oldPartitioner);
SchemaLoader.stopGossiper();
}
/** Setup a virtual node ring */
private static Map<Token<?>, InetAddress> createInitialRing(int size) throws UnknownHostException
{
Map<Token<?>, InetAddress> tokenMap = new HashMap<Token<?>, InetAddress>();
int currentToken = TOKEN_STEP;
for(int i = 0; i < size; i++)
{
InetAddress endpoint = InetAddress.getByName("127.0.0." + String.valueOf(i + 1));
Gossiper.instance.initializeNodeUnsafe(endpoint, UUID.randomUUID(), 1);
List<Token> tokens = new ArrayList<Token>();
for (int j = 0; j < TOKENS_PER_NODE; j++)
{
Token token = new BigIntegerToken(String.valueOf(currentToken));
tokenMap.put(token, endpoint);
tokens.add(token);
currentToken += TOKEN_STEP;
}
Gossiper.instance.injectApplicationState(endpoint, ApplicationState.TOKENS, vvFactory.tokens(tokens));
StorageService.instance.onChange(endpoint, ApplicationState.STATUS, vvFactory.normal(tokens));
}
return tokenMap;
}
// Copy-pasta from MoveTest.java
private AbstractReplicationStrategy getStrategy(String keyspaceName, TokenMetadata tmd) throws ConfigurationException
{
KSMetaData ksmd = Schema.instance.getKSMetaData(keyspaceName);
return AbstractReplicationStrategy.createReplicationStrategy(
keyspaceName,
ksmd.strategyClass,
tmd,
new SimpleSnitch(),
ksmd.strategyOptions);
}
/** Ensure proper write endpoints during relocation */
@Test
public void testWriteEndpointsDuringRelocate() throws Exception
{
Map<Token<?>, InetAddress> tokenMap = createInitialRing(5);
Map<Token, List<InetAddress>> expectedEndpoints = new HashMap<Token, List<InetAddress>>();
for (Token<?> token : tokenMap.keySet())
{
BigIntegerToken keyToken = new BigIntegerToken(((BigInteger)token.token).add(new BigInteger("5")));
List<InetAddress> endpoints = new ArrayList<InetAddress>();
Iterator<Token> tokenIter = TokenMetadata.ringIterator(tmd.sortedTokens(), keyToken, false);
while (tokenIter.hasNext())
{
InetAddress ep = tmd.getEndpoint(tokenIter.next());
if (!endpoints.contains(ep))
endpoints.add(ep);
}
expectedEndpoints.put(keyToken, endpoints);
}
// Relocate the first token from the first endpoint, to the second endpoint.
Token relocateToken = new BigIntegerToken(String.valueOf(TOKEN_STEP));
ss.onChange(
InetAddress.getByName("127.0.0.2"),
ApplicationState.STATUS,
vvFactory.relocating(Collections.singleton(relocateToken)));
assertTrue(tmd.isRelocating(relocateToken));
AbstractReplicationStrategy strategy;
for (String keyspaceName : Schema.instance.getNonSystemKeyspaces())
{
strategy = getStrategy(keyspaceName, tmd);
for (Token token : tokenMap.keySet())
{
BigIntegerToken keyToken = new BigIntegerToken(((BigInteger)token.token).add(new BigInteger("5")));
HashSet<InetAddress> actual = new HashSet<InetAddress>(tmd.getWriteEndpoints(keyToken, keyspaceName, strategy.calculateNaturalEndpoints(keyToken, tmd.cloneOnlyTokenMap())));
HashSet<InetAddress> expected = new HashSet<InetAddress>();
for (int i = 0; i < actual.size(); i++)
expected.add(expectedEndpoints.get(keyToken).get(i));
assertEquals("mismatched endpoint sets", expected, actual);
}
}
}
/** Use STATUS changes to trigger membership update and validate results. */
@Test
public void testRelocationSuccess() throws UnknownHostException
{
createInitialRing(5);
// Node handling the relocation (dst), and the token being relocated (src).
InetAddress relocator = InetAddress.getByName("127.0.0.3");
Token relocatee = new BigIntegerToken(String.valueOf(TOKEN_STEP));
// Send RELOCATING and ensure token status
ss.onChange(relocator, ApplicationState.STATUS, vvFactory.relocating(Collections.singleton(relocatee)));
assertTrue(tmd.isRelocating(relocatee));
// Create a list of the endpoint's existing tokens, and add the relocatee to it.
List<Token> tokens = new ArrayList<Token>(tmd.getTokens(relocator));
SystemKeyspace.updateTokens(tokens);
tokens.add(relocatee);
// Send a normal status, then ensure all is copesetic.
Gossiper.instance.injectApplicationState(relocator, ApplicationState.TOKENS, vvFactory.tokens(tokens));
ss.onChange(relocator, ApplicationState.STATUS, vvFactory.normal(tokens));
// Relocating entries are removed after RING_DELAY
Uninterruptibles.sleepUninterruptibly(StorageService.RING_DELAY + 10, TimeUnit.MILLISECONDS);
assertTrue(!tmd.isRelocating(relocatee));
assertEquals(tmd.getEndpoint(relocatee), relocator);
}
}