/*
* 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.locator;
import java.net.InetAddress;
import java.net.UnknownHostException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Set;
import org.junit.Before;
import org.junit.BeforeClass;
import org.junit.Test;
import org.apache.cassandra.config.DatabaseDescriptor;
import org.apache.cassandra.dht.RandomPartitioner.BigIntegerToken;
import org.apache.cassandra.dht.Range;
import org.apache.cassandra.dht.Token;
import org.apache.cassandra.service.StorageService;
import org.apache.cassandra.utils.Pair;
import static org.junit.Assert.assertEquals;
public class OldNetworkTopologyStrategyTest
{
private List<Token> keyTokens;
private TokenMetadata tmd;
private Map<String, ArrayList<InetAddress>> expectedResults;
@BeforeClass
public static void setupDD()
{
DatabaseDescriptor.daemonInitialization();
}
@Before
public void init()
{
keyTokens = new ArrayList<Token>();
tmd = new TokenMetadata();
expectedResults = new HashMap<String, ArrayList<InetAddress>>();
}
/**
* 4 same rack endpoints
*
* @throws java.net.UnknownHostException
*/
@Test
public void testBigIntegerEndpointsA() throws UnknownHostException
{
RackInferringSnitch endpointSnitch = new RackInferringSnitch();
AbstractReplicationStrategy strategy = new OldNetworkTopologyStrategy("Keyspace1", tmd, endpointSnitch, optsWithRF(1));
addEndpoint("0", "5", "254.0.0.1");
addEndpoint("10", "15", "254.0.0.2");
addEndpoint("20", "25", "254.0.0.3");
addEndpoint("30", "35", "254.0.0.4");
expectedResults.put("5", buildResult("254.0.0.2", "254.0.0.3", "254.0.0.4"));
expectedResults.put("15", buildResult("254.0.0.3", "254.0.0.4", "254.0.0.1"));
expectedResults.put("25", buildResult("254.0.0.4", "254.0.0.1", "254.0.0.2"));
expectedResults.put("35", buildResult("254.0.0.1", "254.0.0.2", "254.0.0.3"));
testGetEndpoints(strategy, keyTokens.toArray(new Token[0]));
}
/**
* 3 same rack endpoints
* 1 external datacenter
*
* @throws java.net.UnknownHostException
*/
@Test
public void testBigIntegerEndpointsB() throws UnknownHostException
{
RackInferringSnitch endpointSnitch = new RackInferringSnitch();
AbstractReplicationStrategy strategy = new OldNetworkTopologyStrategy("Keyspace1", tmd, endpointSnitch, optsWithRF(1));
addEndpoint("0", "5", "254.0.0.1");
addEndpoint("10", "15", "254.0.0.2");
addEndpoint("20", "25", "254.1.0.3");
addEndpoint("30", "35", "254.0.0.4");
expectedResults.put("5", buildResult("254.0.0.2", "254.1.0.3", "254.0.0.4"));
expectedResults.put("15", buildResult("254.1.0.3", "254.0.0.4", "254.0.0.1"));
expectedResults.put("25", buildResult("254.0.0.4", "254.1.0.3", "254.0.0.1"));
expectedResults.put("35", buildResult("254.0.0.1", "254.1.0.3", "254.0.0.2"));
testGetEndpoints(strategy, keyTokens.toArray(new Token[0]));
}
/**
* 2 same rack endpoints
* 1 same datacenter, different rack endpoints
* 1 external datacenter
*
* @throws java.net.UnknownHostException
*/
@Test
public void testBigIntegerEndpointsC() throws UnknownHostException
{
RackInferringSnitch endpointSnitch = new RackInferringSnitch();
AbstractReplicationStrategy strategy = new OldNetworkTopologyStrategy("Keyspace1", tmd, endpointSnitch, optsWithRF(1));
addEndpoint("0", "5", "254.0.0.1");
addEndpoint("10", "15", "254.0.0.2");
addEndpoint("20", "25", "254.0.1.3");
addEndpoint("30", "35", "254.1.0.4");
expectedResults.put("5", buildResult("254.0.0.2", "254.0.1.3", "254.1.0.4"));
expectedResults.put("15", buildResult("254.0.1.3", "254.1.0.4", "254.0.0.1"));
expectedResults.put("25", buildResult("254.1.0.4", "254.0.0.1", "254.0.0.2"));
expectedResults.put("35", buildResult("254.0.0.1", "254.0.1.3", "254.1.0.4"));
testGetEndpoints(strategy, keyTokens.toArray(new Token[0]));
}
private ArrayList<InetAddress> buildResult(String... addresses) throws UnknownHostException
{
ArrayList<InetAddress> result = new ArrayList<InetAddress>();
for (String address : addresses)
{
result.add(InetAddress.getByName(address));
}
return result;
}
private void addEndpoint(String endpointTokenID, String keyTokenID, String endpointAddress) throws UnknownHostException
{
BigIntegerToken endpointToken = new BigIntegerToken(endpointTokenID);
BigIntegerToken keyToken = new BigIntegerToken(keyTokenID);
keyTokens.add(keyToken);
InetAddress ep = InetAddress.getByName(endpointAddress);
tmd.updateNormalToken(endpointToken, ep);
}
private void testGetEndpoints(AbstractReplicationStrategy strategy, Token[] keyTokens)
{
for (Token keyToken : keyTokens)
{
List<InetAddress> endpoints = strategy.getNaturalEndpoints(keyToken);
for (int j = 0; j < endpoints.size(); j++)
{
ArrayList<InetAddress> hostsExpected = expectedResults.get(keyToken.toString());
assertEquals(endpoints.get(j), hostsExpected.get(j));
}
}
}
/**
* test basic methods to move a node. For sure, it's not the best place, but it's easy to test
*
* @throws java.net.UnknownHostException
*/
@Test
public void testMoveLeft() throws UnknownHostException
{
// Moves to the left : nothing to fetch, last part to stream
int movingNodeIdx = 1;
BigIntegerToken newToken = new BigIntegerToken("21267647932558653966460912964485513216");
BigIntegerToken[] tokens = initTokens();
BigIntegerToken[] tokensAfterMove = initTokensAfterMove(tokens, movingNodeIdx, newToken);
Pair<Set<Range<Token>>, Set<Range<Token>>> ranges = calculateStreamAndFetchRanges(tokens, tokensAfterMove, movingNodeIdx);
assertEquals(ranges.left.iterator().next().left, tokensAfterMove[movingNodeIdx]);
assertEquals(ranges.left.iterator().next().right, tokens[movingNodeIdx]);
assertEquals("No data should be fetched", ranges.right.size(), 0);
}
@Test
public void testMoveRight() throws UnknownHostException
{
// Moves to the right : last part to fetch, nothing to stream
int movingNodeIdx = 1;
BigIntegerToken newToken = new BigIntegerToken("35267647932558653966460912964485513216");
BigIntegerToken[] tokens = initTokens();
BigIntegerToken[] tokensAfterMove = initTokensAfterMove(tokens, movingNodeIdx, newToken);
Pair<Set<Range<Token>>, Set<Range<Token>>> ranges = calculateStreamAndFetchRanges(tokens, tokensAfterMove, movingNodeIdx);
assertEquals("No data should be streamed", ranges.left.size(), 0);
assertEquals(ranges.right.iterator().next().left, tokens[movingNodeIdx]);
assertEquals(ranges.right.iterator().next().right, tokensAfterMove[movingNodeIdx]);
}
@SuppressWarnings("unchecked")
@Test
public void testMoveMiddleOfRing() throws UnknownHostException
{
// moves to another position in the middle of the ring : should stream all its data, and fetch all its new data
int movingNodeIdx = 1;
int movingNodeIdxAfterMove = 4;
BigIntegerToken newToken = new BigIntegerToken("90070591730234615865843651857942052864");
BigIntegerToken[] tokens = initTokens();
BigIntegerToken[] tokensAfterMove = initTokensAfterMove(tokens, movingNodeIdx, newToken);
Pair<Set<Range<Token>>, Set<Range<Token>>> ranges = calculateStreamAndFetchRanges(tokens, tokensAfterMove, movingNodeIdx);
// sort the results, so they can be compared
Range<Token>[] toStream = ranges.left.toArray(new Range[0]);
Range<Token>[] toFetch = ranges.right.toArray(new Range[0]);
Arrays.sort(toStream);
Arrays.sort(toFetch);
// build expected ranges
Range<Token>[] toStreamExpected = new Range[2];
toStreamExpected[0] = new Range<Token>(getToken(movingNodeIdx - 2, tokens), getToken(movingNodeIdx - 1, tokens));
toStreamExpected[1] = new Range<Token>(getToken(movingNodeIdx - 1, tokens), getToken(movingNodeIdx, tokens));
Arrays.sort(toStreamExpected);
Range<Token>[] toFetchExpected = new Range[2];
toFetchExpected[0] = new Range<Token>(getToken(movingNodeIdxAfterMove - 1, tokens), getToken(movingNodeIdxAfterMove, tokens));
toFetchExpected[1] = new Range<Token>(getToken(movingNodeIdxAfterMove, tokensAfterMove), getToken(movingNodeIdx, tokensAfterMove));
Arrays.sort(toFetchExpected);
assertEquals(Arrays.equals(toStream, toStreamExpected), true);
assertEquals(Arrays.equals(toFetch, toFetchExpected), true);
}
@SuppressWarnings("unchecked")
@Test
public void testMoveAfterNextNeighbors() throws UnknownHostException
{
// moves after its next neighbor in the ring
int movingNodeIdx = 1;
int movingNodeIdxAfterMove = 2;
BigIntegerToken newToken = new BigIntegerToken("52535295865117307932921825928971026432");
BigIntegerToken[] tokens = initTokens();
BigIntegerToken[] tokensAfterMove = initTokensAfterMove(tokens, movingNodeIdx, newToken);
Pair<Set<Range<Token>>, Set<Range<Token>>> ranges = calculateStreamAndFetchRanges(tokens, tokensAfterMove, movingNodeIdx);
// sort the results, so they can be compared
Range<Token>[] toStream = ranges.left.toArray(new Range[0]);
Range<Token>[] toFetch = ranges.right.toArray(new Range[0]);
Arrays.sort(toStream);
Arrays.sort(toFetch);
// build expected ranges
Range<Token>[] toStreamExpected = new Range[1];
toStreamExpected[0] = new Range<Token>(getToken(movingNodeIdx - 2, tokens), getToken(movingNodeIdx - 1, tokens));
Arrays.sort(toStreamExpected);
Range<Token>[] toFetchExpected = new Range[2];
toFetchExpected[0] = new Range<Token>(getToken(movingNodeIdxAfterMove - 1, tokens), getToken(movingNodeIdxAfterMove, tokens));
toFetchExpected[1] = new Range<Token>(getToken(movingNodeIdxAfterMove, tokensAfterMove), getToken(movingNodeIdx, tokensAfterMove));
Arrays.sort(toFetchExpected);
assertEquals(Arrays.equals(toStream, toStreamExpected), true);
assertEquals(Arrays.equals(toFetch, toFetchExpected), true);
}
@SuppressWarnings("unchecked")
@Test
public void testMoveBeforePreviousNeighbor() throws UnknownHostException
{
// moves before its previous neighbor in the ring
int movingNodeIdx = 1;
int movingNodeIdxAfterMove = 7;
BigIntegerToken newToken = new BigIntegerToken("158873535527910577765226390751398592512");
BigIntegerToken[] tokens = initTokens();
BigIntegerToken[] tokensAfterMove = initTokensAfterMove(tokens, movingNodeIdx, newToken);
Pair<Set<Range<Token>>, Set<Range<Token>>> ranges = calculateStreamAndFetchRanges(tokens, tokensAfterMove, movingNodeIdx);
Range<Token>[] toStream = ranges.left.toArray(new Range[0]);
Range<Token>[] toFetch = ranges.right.toArray(new Range[0]);
Arrays.sort(toStream);
Arrays.sort(toFetch);
Range<Token>[] toStreamExpected = new Range[2];
toStreamExpected[0] = new Range<Token>(getToken(movingNodeIdx, tokensAfterMove), getToken(movingNodeIdx - 1, tokensAfterMove));
toStreamExpected[1] = new Range<Token>(getToken(movingNodeIdx - 1, tokens), getToken(movingNodeIdx, tokens));
Arrays.sort(toStreamExpected);
Range<Token>[] toFetchExpected = new Range[1];
toFetchExpected[0] = new Range<Token>(getToken(movingNodeIdxAfterMove - 1, tokens), getToken(movingNodeIdxAfterMove, tokens));
Arrays.sort(toFetchExpected);
System.out.println("toStream : " + Arrays.toString(toStream));
System.out.println("toFetch : " + Arrays.toString(toFetch));
System.out.println("toStreamExpected : " + Arrays.toString(toStreamExpected));
System.out.println("toFetchExpected : " + Arrays.toString(toFetchExpected));
assertEquals(Arrays.equals(toStream, toStreamExpected), true);
assertEquals(Arrays.equals(toFetch, toFetchExpected), true);
}
private BigIntegerToken[] initTokensAfterMove(BigIntegerToken[] tokens,
int movingNodeIdx, BigIntegerToken newToken)
{
BigIntegerToken[] tokensAfterMove = tokens.clone();
tokensAfterMove[movingNodeIdx] = newToken;
return tokensAfterMove;
}
private BigIntegerToken[] initTokens()
{
BigIntegerToken[] tokens = new BigIntegerToken[] {
new BigIntegerToken("0"), // just to be able to test
new BigIntegerToken("34028236692093846346337460743176821145"),
new BigIntegerToken("42535295865117307932921825928971026432"),
new BigIntegerToken("63802943797675961899382738893456539648"),
new BigIntegerToken("85070591730234615865843651857942052864"),
new BigIntegerToken("106338239662793269832304564822427566080"),
new BigIntegerToken("127605887595351923798765477786913079296"),
new BigIntegerToken("148873535527910577765226390751398592512")
};
return tokens;
}
private TokenMetadata initTokenMetadata(BigIntegerToken[] tokens)
throws UnknownHostException
{
TokenMetadata tokenMetadataCurrent = new TokenMetadata();
int lastIPPart = 1;
for (BigIntegerToken token : tokens)
tokenMetadataCurrent.updateNormalToken(token, InetAddress.getByName("254.0.0." + Integer.toString(lastIPPart++)));
return tokenMetadataCurrent;
}
private BigIntegerToken getToken(int idx, BigIntegerToken[] tokens)
{
if (idx >= tokens.length)
idx = idx % tokens.length;
while (idx < 0)
idx += tokens.length;
return tokens[idx];
}
private Pair<Set<Range<Token>>, Set<Range<Token>>> calculateStreamAndFetchRanges(BigIntegerToken[] tokens, BigIntegerToken[] tokensAfterMove, int movingNodeIdx) throws UnknownHostException
{
RackInferringSnitch endpointSnitch = new RackInferringSnitch();
InetAddress movingNode = InetAddress.getByName("254.0.0." + Integer.toString(movingNodeIdx + 1));
TokenMetadata tokenMetadataCurrent = initTokenMetadata(tokens);
TokenMetadata tokenMetadataAfterMove = initTokenMetadata(tokensAfterMove);
AbstractReplicationStrategy strategy = new OldNetworkTopologyStrategy("Keyspace1", tokenMetadataCurrent, endpointSnitch, optsWithRF(2));
Collection<Range<Token>> currentRanges = strategy.getAddressRanges().get(movingNode);
Collection<Range<Token>> updatedRanges = strategy.getPendingAddressRanges(tokenMetadataAfterMove, tokensAfterMove[movingNodeIdx], movingNode);
Pair<Set<Range<Token>>, Set<Range<Token>>> ranges = StorageService.instance.calculateStreamAndFetchRanges(currentRanges, updatedRanges);
return ranges;
}
private static Map<String, String> optsWithRF(int rf)
{
return Collections.singletonMap("replication_factor", Integer.toString(rf));
}
}