public SystemInfo getSystemInfo(String ip, int port) {
		MonitorClientService monitorClient = monitorClientMap.get(ip);
		if (monitorClient == null) {
			monitorClient = new MonitorClientService(ip, port);
			monitorClient.init();
			IOUtils.closeQuietly(monitorClientMap.put(ip, monitorClient));
		}
		monitorClient.update();
		monitorClient.setLastAccessedTime(System.currentTimeMillis());
		return monitorClient.getSystemInfo();
	}
Get monitor data from mbean client.

@param ip   ip
@param port port
@return {@link org.ngrinder.monitor.share.domain.SystemInfo}
ngrinder-controller/src/main/java/org/ngrinder/perftest/service/monitor/MonitorInfoStore.java