Cluster Shared Cache [closed]

Answer 1

How about this?

Have a local ConcurrentHashMap as your local cache. Create a Hazelcast distributed map/cache. Start listening for the distributed map events and update your local ConcurrentHashMap.

Now local caches on each member will be the same. Auto-synched.

import com.hazelcast.core.IMap; 
import com.hazelcast.core.Hazelcast;
import com.hazelcast.core.EntryListener;
import com.hazelcast.core.EntryEvent; 
import java.util.concurrent.ConcurrentHashMap;

public class Sample implements EntryListener {
        Map localCache = new ConcurrentHashMap ();

        public static void main(String[] args) { 
                Sample sample = new Sample();
                IMap   map    = Hazelcast.getMap("default"); 

                //Listen for all added/updated/removed entries
                map.addEntryListener(sample, true);  
        }

        public void entryAdded(EntryEvent event) {
             localCache.put(event.getKey(), event.getValue());            
        }

        public void entryRemoved(EntryEvent event) {
             localCache.remove(event.getKey());            
        }

        public void entryUpdated(EntryEvent event) {
             localCache.put(event.getKey(), event.getValue());            
        }
}

Answer 2

After some more searching, I found JGroup's ReplicatedHashMap. It has not been thoroughly tested but it seems like an excellent start. It fills all my requirements without giving me too much features I don't need. It's also quite flexible. I'm still searching for the "perfect" answer though :)

Thanks for your answers.