mongodb删除已处理过的数据，即非新增数据

 

    /**
     * 删除已处理过的数据(此数据已被迁移到mysql中)
     * QueryOperators.NIN
     */
    public void deleteProcessedAlarm () {
        DBCollection dBCollection = getAlarmColl();
        BasicDBObject query = new BasicDBObject();
        BasicDBObject stateCond = new BasicDBObject(LedConstants.MONGODB_ALARM_STATE, LedConstants.MONGODB_ALARM_STATE_NEW);
        query.put(LedConstants.MONGODB_ALARM_STATE, new BasicDBObject(QueryOperators.NIN, stateCond));

        dBCollection.remove(query);
    }