This was a simple Service Builder application for administering redirects in Liferay. The redirects are implemented through a servlet filter.
Redirects were stored as follows in the database
MySQL [lportal]> select * from ShortLink_ShortLinkEntry limit 10;
+--------------------------------------+------------------+---------------------+---------------------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------+-----------------------+----------------+---------+
| uuid_ | shortLinkEntryId | createDate | modifiedDate | originalURL | shortURL | httpStatusCode | active_ |
+--------------------------------------+------------------+---------------------+---------------------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------+-----------------------+----------------+---------+
| eab4cf31-0c27-4a13-b404-968367f6b36d | 101 | 2017-05-06 01:36:38 | 2017-05-12 20:30:21 | https://web.liferay.com/tour-de-liferay/robot | tour-de-liferay/robot | 301 | 1 |
| eb57013b-b1c4-44b3-8f5b-6e8647de1976 | 102 | 2017-05-06 01:41:08 | 2017-05-12 20:31:53 | https://discover.liferay.com/digital_experience_platforms?utm_source=emerce_ad&utm_medium=display&utm_content=ready_future&utm_campaign=70170000000uxkf | emerce | 301 | 1 |
| ed12e601-0b15-4eea-a219-e6f807c704fc | 103 | 2017-05-06 01:41:50 | 2017-09-18 16:41:35 | https://discover.liferay.com/digital-success-webinar?utm_source=eday&utm_medium=content&utm_content=card&utm_campaign=70170000000vK74 | eday | 301 | 1 |
| bc4bf21b-dab1-4b46-9dbf-3c20e0cfd06d | 104 | 2017-05-06 01:42:45 | 2017-05-12 20:53:57 | https://discover.liferay.com/digital_experience_platforms?utm_source=event_digital_first&utm_medium=display&utm_content=ready_future&utm_campaign=70170000000uxkf | digitalfirst | 301 | 1 |
| 032c80c8-2137-4b3d-b9ff-c6ab8885f5f6 | 105 | 2017-05-06 01:43:09 | 2017-05-12 20:54:13 | https://www.liferay.com/resource/illinois-student-assistance-commission | isac | 301 | 1 |
| 94c5a721-b4ba-4ad6-b890-584d96ca2ffe | 108 | 2017-05-06 01:49:15 | 2017-05-12 20:55:25 | https://www.liferay.com/resource?folderId=1645493&title=Liferay+Buyers+Guide+Checklist | get-checklist | 301 | 1 |
| 5b044c8c-f1ef-4c10-ae91-15e66a23b8d0 | 110 | 2017-05-06 01:52:33 | 2017-05-12 20:55:32 | https://web.liferay.com/web/events2016/brazil?_ga=2.220537816.1124888591.1494035473-305552205.1481774868 | brazil2016 | 301 | 1 |
| e94cde2b-abc3-419c-918a-748bb28c951f | 111 | 2017-05-06 01:53:08 | 2017-05-12 20:55:37 | https://web.liferay.com/web/events2016/italy/recap | italy2016 | 301 | 1 |
| 1e6314a1-9d49-4139-b927-36401c0cf536 | 112 | 2017-05-06 01:53:48 | 2017-05-12 20:55:59 | http://discover.liferay.com/dxp-roadshow-budapest | budapest | 301 | 1 |
| 5763f5a8-fb36-4785-ac52-fa2b46bb406c | 114 | 2017-05-06 01:55:21 | 2017-05-12 20:56:16 | https://web.liferay.com/web/events2016/modconf | modconf | 301 | 1 |
+--------------------------------------+------------------+---------------------+---------------------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------+-----------------------+----------------+---------+
10 rows in set (0.001 sec)
In 7.3 we replaced this with the new Redirections feature.