Examples of org.jivesoftware.util.cache.Cache

org.jivesoftware.util.cache.Cache
General purpose cache. It stores objects associated with unique keys in memory for fast access. All keys and values added to the cache must implement the Serializable interface. Values may implement the Cacheable interface, which allows the cache to determine object size much more quickly. These restrictions allow a cache to never grow larger than a specified number of bytes and to optionally be distributed over a cluster of servers.
If the cache does grow too large, objects will be removed such that those that are accessed least frequently are removed first. Because expiration happens automatically, the cache makes no gaurantee as to how long an object will remain in cache after it is put in.
Optionally, a maximum lifetime for all objects can be specified. In that case, objects will be deleted from cache after that amount of time, even if they are frequently accessed. This feature is useful if objects put in cache represent data that should be periodically refreshed; for example, information from a database.
All cache operations are thread safe.
@see Cacheable

                cacheStats = (Map<String, Map<String, long[]>>)com.tangosol.net.CacheFactory.getCache("opt-$cacheStats");
            }
            String uid = cluster.getLocalMember().getUid().toString();
            Map<String, long[]> stats = new HashMap<String, long[]>();
            for (String cacheName : caches.keySet()) {
                Cache cache = caches.get(cacheName);
                // The following information is published:
                // current size, max size, num elements, cache
                // hits, cache misses.
                long [] info = new long[5];
                info[0] = cache.getCacheSize();
                info[1] = cache.getMaxCacheSize();
                info[2] = cache.size();
                info[3] = cache.getCacheHits();
                info[4] = cache.getCacheMisses();
                stats.put(cacheName, info);
            }
            // Publish message
            cacheStats.put(uid, stats);
        }

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        simuateCacheInserts(directedPresencesCache);
    }


    private void addMapListener(Cache cache, MapListener listener) {
        if (cache instanceof CacheWrapper) {
            Cache wrapped = ((CacheWrapper)cache).getWrappedCache();
            if (wrapped instanceof ClusteredCache) {
                ((ClusteredCache)wrapped).addMapListener(listener, new MapEventFilter(MapEventFilter.E_KEYSET), false);
                // Keep track of the listener that we added to the cache
                mapListeners.put(cache, listener);
            }

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    private void simuateCacheInserts(Cache<Object, Object> cache) {
        MapListener mapListener = mapListeners.get(cache);
        if (mapListener != null) {
            if (cache instanceof CacheWrapper) {
                Cache wrapped = ((CacheWrapper) cache).getWrappedCache();
                if (wrapped instanceof ClusteredCache) {
                    ClusteredCache clusteredCache = (ClusteredCache) wrapped;
                    for (Map.Entry entry : cache.entrySet()) {
                        MapEvent event = new MapEvent(clusteredCache.map, MapEvent.ENTRY_INSERTED, entry.getKey(), null,
                                entry.getValue());

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Related Classes of org.jivesoftware.util.cache.Cache

com.jivesoftware.util.cache.ClusterListener

com.jivesoftware.util.cache.CoherenceClusteredCacheFactory

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