private String getConnectedAgentRegion(String subregion) {
		String region = regionService.getCurrent();
		RegionInfo regionInfo = regionService.getOne(region);
		if (config.isClustered() && isValidSubregion(regionInfo, subregion)) {
			region = region + "." + subregion;
		}
		return region;
	}
${@link List} of ready status agents information return

@param userId          the login user id
@param targetRegion    the name of target region
@param targetSubregion the name of target subregion

@return ${@link List} of ready status agents information
ngrinder-controller/src/main/java/org/ngrinder/agent/service/AgentService.java