[infinispan-dev] Native Infinispan Multimap support

[Katia Aresti]

Hi all,

As you probably know, Will and I are working on the vert-x infinispan
integration [1], where the primary goal is to make infinispan the default
cluster management of vert-x. (yeah!)
Vert-x needs support for an Async Multimap. Today's implementation is a
wrapper on a normal Cache where only Cache Key's are used to implement the
multi map [2].
This is not very efficient, so after trying some other alternative
implementations [3] that don't fully work (injection not working), Will and
I have come to the conclusion that it might be a good idea to start having
our own native CacheMultimap. This first multimap won't support duplicate
values on key's.

As a quick start, the smallest multimap we need should implement the
following interface :

public interface CacheMultimap<K, V> {
   V put(K key, V value);

   Collection<V> get(K key);

   boolean remove(K key, V value);
}

CacheMultimapImpl will be a wrapper on a normal Cache, similar to [3].

We could add a new method in EmbeddedCacheManager.java

<K, V> CacheMultimap<K, V> getCacheMultimap(String cacheName, boolean
createIfAbsent);

Implementation will create a cache as always and return a new
CacheMultimapImpl(cache).

What do you think ? Please fell free to suggest any other alternative or
idea.

Cheers

Katia

[1] https://github.com/vert-x3/vertx-infinispan

[2]
https://github.com/vert-x3/vertx-infinispan/blob/master/src/main/java/io/vertx/ext/cluster/infinispan/impl/InfinispanAsyncMultiMap.java

[3] https://gist.github.com/karesti/194bb998856d4a2828d83754130ed79c
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