private synchronized void startProcessRequest() throws ProxyCacheException {
        proxyCache = proxyCache == null ? newHttpProxyCache() : proxyCache;
    }
Client for {@link HttpProxyCacheServer}

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