public boolean isInit(SERVICE service){
		boolean isInit = false;
		switch(service){
			case CONNECTION_SERVICE :
				if(connectionManager != null)
					isInit = true;
			break;

			case CHANNEL_SERVICE :
				if(channelManager != null)
					isInit = true;
			break;
			
			case REQUEST_SERVICE :
				if(requestManager != null)
					isInit = true;
			break;
			
			case USER_SERVICE :
				if(userManager != null)
					isInit = true;
			break;
				
			default : isInit = false;;
		}
		return isInit;
	}