/*
* 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.repair;
import java.net.InetAddress;
import java.util.HashSet;
import java.util.Set;
import java.util.UUID;
import org.junit.After;
import org.junit.Test;
import org.apache.cassandra.SchemaLoader;
import org.apache.cassandra.dht.IPartitioner;
import org.apache.cassandra.dht.Murmur3Partitioner;
import org.apache.cassandra.dht.Range;
import org.apache.cassandra.dht.Token;
import org.apache.cassandra.net.MessageIn;
import org.apache.cassandra.net.MessageOut;
import org.apache.cassandra.net.MessagingService;
import org.apache.cassandra.sink.IMessageSink;
import org.apache.cassandra.sink.SinkManager;
import org.apache.cassandra.repair.messages.RepairMessage;
import org.apache.cassandra.repair.messages.SyncComplete;
import org.apache.cassandra.utils.MerkleTree;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;
public class DifferencerTest extends SchemaLoader
{
private static final IPartitioner partirioner = new Murmur3Partitioner();
@After
public void tearDown()
{
SinkManager.clear();
}
/**
* When there is no difference between two, Differencer should respond SYNC_COMPLETE
*/
@Test
public void testNoDifference() throws Throwable
{
final InetAddress ep1 = InetAddress.getByName("127.0.0.1");
final InetAddress ep2 = InetAddress.getByName("127.0.0.1");
SinkManager.add(new IMessageSink()
{
@SuppressWarnings("unchecked")
public MessageOut handleMessage(MessageOut message, int id, InetAddress to)
{
if (message.verb == MessagingService.Verb.REPAIR_MESSAGE)
{
RepairMessage m = (RepairMessage) message.payload;
assertEquals(RepairMessage.Type.SYNC_COMPLETE, m.messageType);
// we should see SYNC_COMPLETE
assertEquals(new NodePair(ep1, ep2), ((SyncComplete)m).nodes);
}
return null;
}
public MessageIn handleMessage(MessageIn message, int id, InetAddress to)
{
return null;
}
});
Range<Token> range = new Range<>(partirioner.getMinimumToken(), partirioner.getRandomToken());
RepairJobDesc desc = new RepairJobDesc(UUID.randomUUID(), "Keyspace1", "Standard1", range);
MerkleTree tree1 = createInitialTree(desc);
MerkleTree tree2 = createInitialTree(desc);
// difference the trees
// note: we reuse the same endpoint which is bogus in theory but fine here
TreeResponse r1 = new TreeResponse(ep1, tree1);
TreeResponse r2 = new TreeResponse(ep2, tree2);
Differencer diff = new Differencer(desc, r1, r2);
diff.run();
assertTrue(diff.differences.isEmpty());
}
@Test
public void testDifference() throws Throwable
{
Range<Token> range = new Range<>(partirioner.getMinimumToken(), partirioner.getRandomToken());
RepairJobDesc desc = new RepairJobDesc(UUID.randomUUID(), "Keyspace1", "Standard1", range);
MerkleTree tree1 = createInitialTree(desc);
MerkleTree tree2 = createInitialTree(desc);
// change a range in one of the trees
Token token = partirioner.midpoint(range.left, range.right);
tree1.invalidate(token);
MerkleTree.TreeRange changed = tree1.get(token);
changed.hash("non-empty hash!".getBytes());
Set<Range<Token>> interesting = new HashSet<>();
interesting.add(changed);
// difference the trees
// note: we reuse the same endpoint which is bogus in theory but fine here
TreeResponse r1 = new TreeResponse(InetAddress.getByName("127.0.0.1"), tree1);
TreeResponse r2 = new TreeResponse(InetAddress.getByName("127.0.0.2"), tree2);
Differencer diff = new Differencer(desc, r1, r2);
diff.run();
// ensure that the changed range was recorded
assertEquals("Wrong differing ranges", interesting, new HashSet<>(diff.differences));
}
private MerkleTree createInitialTree(RepairJobDesc desc)
{
MerkleTree tree = new MerkleTree(partirioner, desc.range, MerkleTree.RECOMMENDED_DEPTH, (int)Math.pow(2, 15));
tree.init();
for (MerkleTree.TreeRange r : tree.invalids())
{
r.ensureHashInitialised();
}
return tree;
}
}