public KnappsackIntegrationTestCacheRegionFactory() {
HazelcastInstance instance = Hazelcast.getHazelcastInstanceByName("integration-test-instance");
if(instance == null) {
Config config = getConfig();
this.hazelcastCacheRegionFactory = new HazelcastCacheRegionFactory(Hazelcast.newHazelcastInstance(config));
} else {
this.hazelcastCacheRegionFactory = new HazelcastCacheRegionFactory(instance);
}
}