/*
* Copyright (c) 2008-2017, 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.cardinality;
import com.hazelcast.cardinality.impl.CardinalityEstimatorContainer;
import com.hazelcast.cardinality.impl.CardinalityEstimatorService;
import com.hazelcast.core.HazelcastInstance;
import com.hazelcast.spi.impl.PartitionSpecificRunnable;
import com.hazelcast.spi.impl.operationservice.impl.OperationServiceImpl;
import com.hazelcast.test.HazelcastParallelClassRunner;
import com.hazelcast.test.HazelcastTestSupport;
import com.hazelcast.test.TestHazelcastInstanceFactory;
import com.hazelcast.test.annotation.ParallelTest;
import com.hazelcast.test.annotation.QuickTest;
import org.junit.Before;
import org.junit.Test;
import org.junit.experimental.categories.Category;
import org.junit.runner.RunWith;
import java.util.concurrent.CountDownLatch;
import static org.junit.Assert.assertEquals;
@RunWith(HazelcastParallelClassRunner.class)
@Category({QuickTest.class, ParallelTest.class})
public class CardinalityEstimatorBackupTest extends HazelcastTestSupport {
private HazelcastInstance instance1;
private HazelcastInstance instance2;
private String name = randomName();
private int partitionId;
private CardinalityEstimator estimator;
@Before
public void init() {
final TestHazelcastInstanceFactory factory = createHazelcastInstanceFactory(2);
instance1 = factory.newHazelcastInstance();
instance2 = factory.newHazelcastInstance();
warmUpPartitions(instance1, instance2);
partitionId = instance1.getPartitionService().getPartition(name).getPartitionId();
estimator = instance1.getCardinalityEstimator(name);
}
@Test
public void testAdd() {
estimator.add(10000L);
assertEstimateValue(instance1, 1L);
assertEstimateValue(instance2, 1L);
}
@Test
public void testAddAll() {
estimator.add(10000L);
estimator.add(20000L);
estimator.add(30000L);
assertEstimateValue(instance1, 3L);
assertEstimateValue(instance2, 3L);
}
private void assertEstimateValue(final HazelcastInstance instance, final long value) {
assertEquals(value, readEstimate(instance));
}
private long readEstimate(final HazelcastInstance instance) {
final OperationServiceImpl operationService = (OperationServiceImpl) getOperationService(instance);
final CardinalityEstimatorService cardinalityEstimatorService = getNodeEngineImpl(instance)
.getService(CardinalityEstimatorService.SERVICE_NAME);
final CardinalityEstimatorBackupTest.GetEstimate task =
new CardinalityEstimatorBackupTest.GetEstimate(cardinalityEstimatorService);
operationService.execute(task);
assertOpenEventually(task.latch);
return task.value;
}
private class GetEstimate implements PartitionSpecificRunnable {
final CountDownLatch latch = new CountDownLatch(1);
final CardinalityEstimatorService cardinalityEstimatorService;
long value;
GetEstimate(CardinalityEstimatorService cardinalityEstimatorService) {
this.cardinalityEstimatorService = cardinalityEstimatorService;
}
@Override
public int getPartitionId() {
return partitionId;
}
@Override
public void run() {
final CardinalityEstimatorContainer estimatorContainer =
cardinalityEstimatorService.getCardinalityEstimatorContainer(name);
value = estimatorContainer.estimate();
latch.countDown();
}
}
}