/**
* {@link com.hazelcast.map.impl.mapstore.writebehind.StoreWorker} delays processing of
* write-behind queues (wbq) by adding delay with {@link
* com.hazelcast.instance.GroupProperty#MAP_REPLICA_SCHEDULED_TASK_DELAY_SECONDS} property. This
* is used to provide some extra robustness against node disaster scenarios by trying to prevent
* lost of entries in wbq-s. Normally backup nodes don't store entries only remove them from
* wbq-s. Here, we are testing removal of entries occurred or not.
*/
@Test
public void testBackupRemovesEntries_afterProcessingDelay() throws Exception {
final int numberOfItems = 10;
final String mapName = randomMapName();
final MapStoreWithCounter mapStore = new MapStoreWithCounter<Integer, String>();
TestMapUsingMapStoreBuilder<Object, Object> storeBuilder = TestMapUsingMapStoreBuilder.create();
final IMap<Object, Object> map =
storeBuilder
.mapName(mapName)
.withMapStore(mapStore)
.withNodeCount(2)
.withNodeFactory(createHazelcastInstanceFactory(2))
.withWriteDelaySeconds(1)
.withBackupCount(1)
.withPartitionCount(1)
.withBackupProcessingDelay(1)
.build();
populateMap(map, numberOfItems);
assertWriteBehindQueuesEmptyOnOwnerAndOnBackups(
mapName, numberOfItems, mapStore, storeBuilder.getNodes());
}
private void killKeyOwner(String key, TestMapUsingMapStoreBuilder<String, Object> storeBuilder) {
HazelcastInstance[] nodes = storeBuilder.getNodes();
HazelcastInstance ownerNode = getOwnerNode(key, nodes);
ownerNode.shutdown();
}
