@Override
    public String insertRule(Rule rule) {
        String ruleId = String.valueOf(ruleIdGenerator.getAndIncrement());
        rule.setRuleId(ruleId);
        alarmRule.put(ruleId, rule);
        return rule.getRuleId();
    }
@author minwoo.jung
@author Jongjin.Bae
web/src/test/java/com/navercorp/pinpoint/web/dao/memory/MemoryAlarmDao.java