Spring Cache Abstraction with Hazelcast Doesn't Evict Key From Cache - spring-boot

Question

With the following configuration, my return object is cached but when I try to evict a key manually it doesnt't work.
#Configuration
#EnableCaching
public class HazelCastConfiguration {
#Bean
public HazelcastCacheManager hazelcastCacheManager() {
return new HazelcastCacheManager(Hazelcast.newHazelcastInstance(hazelcastConfig()));
}
#Bean
public Config hazelcastConfig() {
return new Config()
.setInstanceName("hazelcast-instance")
.addMapConfig(new MapConfig()
.setName("myCache")
.setMaxSizeConfig(new MaxSizeConfig())
.setEvictionPolicy(EvictionPolicy.LRU)
.setStatisticsEnabled(true)
.setTimeToLiveSeconds(-1));
}
}
Cached method:
#Override
#Cacheable(value = "myCache", unless = "#result == null", key = "{#someString, #someLong, #someInteger}")
public List<MyReturnObject> methodWithCachedResults (String someString, Long someLong, Integer someInteger) {
//my logic
}
A sample helper method:
public void evictKey(String aString, Long aLong, Integer anInteger) {
IMap<Object, Object> hazelcastCache = Hazelcast.getHazelcastInstanceByName("hazelcast-instance").getMap("myCache");
hazelcastCache.evict(Arrays.asList(aString, aLong, anInteger));
logger.info("{}", hazelcastCache.keySet());
}
When I trigger the method above, it logs the key even though I force the key to be evicted.
The result is the same when I try with the CacheManager :
#Autowired
private HazelcastCacheManager cacheManager;
public void evictKey(String aString, Long aLong, Integer anInteger) {
cacheManager.getCache("myCache").evict(Arrays.asList(aString, aLong, anInteger));
}
However if I try this, it clears the whole cache which it obviously states:
public void evictKey(String aString, Long aLong, Integer anInteger) {
IMap<Object, Object> hazelcastCache = Hazelcast.getHazelcastInstanceByName("hazelcast-instance").getMap("myCache");
hazelcastCache.clear();
}
By the way, checking keySet().contains(Arrays.asList...) returns true.

Answer 1

It's far from obvious, but there's two implementations of List here.
#Cacheable will create an instance of java.util.ArrayList.
Arrays.asList will create an instance of java.util.Arrays.ArrayList.
This should make it clearer:
public void evictKey(String aString, Long aLong, Integer anInteger) {
IMap<Object, Object> hazelcastCache = Hazelcast.getHazelcastInstanceByName("hazelcast-instance").getMap("myCache");
java.util.List<Object> keyToEvict = Arrays.asList(aString, aLong, anInteger);
boolean success = hazelcastCache.evict(Arrays.asList(aString, aLong, anInteger));
logger.info("Evicted {}, {} == {}", keyToEvict, keyToEvict.getClass(), success);
for (Object key : hazelcastCache.keySet()) {
logger.info("Remaining key {}, {}", key, key.getClass());
}
}