public void shutdown() {
        listeners.clear();
        if (proxyCache != null) {
            proxyCache.registerCacheListener(null);
            proxyCache.shutdown();
            proxyCache = null;
        }
        clientsCount.set(0);
    }
Client for {@link HttpProxyCacheServer}

@author Alexey Danilov (danikula@gmail.com).
dkplayer-videocache/src/main/java/com/danikula/videocache/HttpProxyCacheServerClients.java