/*
* Copyright (c) 2008-2013, Hazelcast, Inc. All Rights Reserved.
*
* Licensed 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 com.hazelcast.partition;
import com.hazelcast.config.Config;
import com.hazelcast.core.Hazelcast;
import com.hazelcast.core.HazelcastInstance;
import com.hazelcast.core.Member;
import com.hazelcast.core.Partition;
import com.hazelcast.instance.GroupProperties;
import com.hazelcast.test.HazelcastSerialClassRunner;
import com.hazelcast.test.HazelcastTestSupport;
import com.hazelcast.test.TestHazelcastInstanceFactory;
import com.hazelcast.test.annotation.SlowTest;
import org.junit.AfterClass;
import org.junit.BeforeClass;
import org.junit.Test;
import org.junit.experimental.categories.Category;
import org.junit.runner.RunWith;
import java.io.IOException;
import java.util.Set;
import java.util.concurrent.ArrayBlockingQueue;
import java.util.concurrent.BlockingQueue;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.TimeUnit;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.assertTrue;
@RunWith(HazelcastSerialClassRunner.class)
@Category(SlowTest.class)
public class PartitionDistributionTest extends HazelcastTestSupport {
@BeforeClass
@AfterClass
public static void killAllHazelcastInstances() throws IOException {
Hazelcast.shutdownAll();
}
@Test
public void testTwoNodesDefault() throws InterruptedException {
testPartitionDistribution(271, 2);
}
@Test
public void testTwoNodes1111Partitions() throws InterruptedException {
testPartitionDistribution(1111, 2);
}
@Test
public void testFiveNodesDefault() throws InterruptedException {
testPartitionDistribution(271, 5);
}
@Test
public void testFiveNodes1111Partitions() throws InterruptedException {
testPartitionDistribution(1111, 5);
}
@Test
public void testTenNodesDefault() throws InterruptedException {
testPartitionDistribution(271, 10);
}
@Test
public void testTenNodes1111Partitions() throws InterruptedException {
testPartitionDistribution(1111, 10);
}
private void testPartitionDistribution(final int partitionCount, final int nodeCount) throws InterruptedException {
final Config config = new Config();
config.setProperty(GroupProperties.PROP_PARTITION_COUNT, String.valueOf(partitionCount));
TestHazelcastInstanceFactory factory = createHazelcastInstanceFactory(nodeCount);
final BlockingQueue<Integer> counts = new ArrayBlockingQueue<Integer>(nodeCount);
final HazelcastInstance[] instances = new HazelcastInstance[nodeCount];
for (int i = 0; i < nodeCount; i++) {
instances[i] = factory.newHazelcastInstance(config);
}
final ExecutorService ex = Executors.newCachedThreadPool();
try {
for (int j = 0; j < nodeCount; j++) {
final int instanceIndex = j;
new Thread(new Runnable() {
public void run() {
HazelcastInstance h = instances[instanceIndex];
warmUpPartitions(h);
counts.offer(getLocalPartitionsCount(h));
}
}).start();
}
final int average = (partitionCount / nodeCount);
int total = 0;
for (int i = 0; i < nodeCount; i++) {
final Integer c = counts.poll(1, TimeUnit.MINUTES);
assertNotNull(c);
assertTrue("Partition count is : " + c + ", total partitions: " + partitionCount
+ ", nodes: " + nodeCount, c >= average);
total += c;
}
assertEquals(partitionCount, total);
} finally {
ex.shutdownNow();
}
}
private int getLocalPartitionsCount(HazelcastInstance h) {
final Member localMember = h.getCluster().getLocalMember();
Set<Partition> partitions = h.getPartitionService().getPartitions();
int count = 0;
for (Partition partition : partitions) {
if (localMember.equals(partition.getOwner())) {
count++;
}
}
return count;
}
}