private boolean isCurrentRegion(AgentInfo agentInfo) {
		String region = config.getRegion();
		return StringUtils.equals(region, agentInfo.getRegion());
	}
Get all approved agents for given user which are not used now.

@param  userId user id
@return AgentInfo set
ngrinder-controller/src/main/java/org/ngrinder/agent/service/AgentService.java