package com.hazelcast.map.mapstore.writebehind;
import com.hazelcast.core.IMap;
import com.hazelcast.test.AssertTask;
import com.hazelcast.test.HazelcastSerialClassRunner;
import com.hazelcast.test.HazelcastTestSupport;
import com.hazelcast.test.annotation.QuickTest;
import org.junit.Test;
import org.junit.experimental.categories.Category;
import org.junit.runner.RunWith;
import static org.junit.Assert.assertTrue;
@RunWith(HazelcastSerialClassRunner.class)
@Category(QuickTest.class)
public class WriteBehindWriteBatchingTest extends HazelcastTestSupport {
@Test
public void testWriteBatching() throws Exception {
final int writeBatchSize = 8;
final MapStoreWithCounter mapStore = new MapStoreWithCounter<Integer, String>();
final IMap<Object, Object> map = TestMapUsingMapStoreBuilder.create()
.withMapStore(mapStore)
.withNodeCount(1)
.withWriteDelaySeconds(3)
.withPartitionCount(1)
.withWriteBatchSize(writeBatchSize)
.build();
final int numberOfItems = 1024;
populateMap(map, numberOfItems);
assertTrueEventually(new AssertTask() {
@Override
public void run() throws Exception {
// expecting more than half of operations should have the write batch size.
// takes this a lower bound.
final int expectedBatchOpCount = (numberOfItems / writeBatchSize) / 2;
final int numberOfBatchOperationsEqualWriteBatchSize = mapStore.findNumberOfBatchsEqualWriteBatchSize(writeBatchSize);
assertTrue(numberOfBatchOperationsEqualWriteBatchSize >= expectedBatchOpCount);
}
}, 20);
}
private void populateMap(IMap map, int numberOfItems) {
for (int i = 0; i < numberOfItems; i++) {
map.put(i, i);
}
}
}