Hi,

Question #1 : you can use existing backend logic, but you need to create REST API for it, so Outsystems can call those API. So far we cannot directly use existing java code into Outsystems.

Question#2 : this is simple, Outsystems already have configuration for connecting to external DB (see my screenshot). After you connect the external DB, you can use it like Outsystems Entity.

Hi Phani,

Please refer below post to get more information.

https://www.outsystems.com/forums/discussion/41629/java-with-integration-tool-11/

Thanks & Kind Regards,

Sachin

Hi Phani,

First, OutSystems no longer directly supports Java. The Java backend is no longer available in the latest version of the Platform, version 11. The last version supporting Java was version 10, but this version is no longer supported.

Secondly, even if Java were supported, using existing code as-is in OutSystems wouldn't be possible. OutSystems generates Java (up to version 10) or .NET code from the OutSystems visual code. It is possible to include external code if it's in libraries through creating an Extension, but this is not encouraged and would still be quite some work if you have a lot of existing code.

As for your last question, connecting to an MSSQL database is easily possible. See here for more details.