Migrate RDF4J to version 4

[bossenti]

Body

RDF4J introduces several breaking changes according to the changelogs (see here and here). Therefore, we need to check the changes introduced and adapt our implementation accordingly.

StreamPipes Committer

I acknowledge that I am a maintainer/committer of the Apache StreamPipes project.

[garimellasrisudha]

Hi Tim,
is this still available?

[bossenti]

Hi @garimellasrisudha

Yes it is. Do you want to work on it?

[garimellasrisudha]

Hi Tim,

yes i am interested to work on this migration.
as this is good first issue could you give me brief on the issue.
it would be helpful.
Thank you :)

[bossenti]

awesome 🚀
I'll assign you to this ticket immediately.

The task of this issue is easy to explain.
We are making use of the library RDF4J throughout our codebase.
Now we want to upgrade to the most recent release (we recently upgraded to the latest 3.x version in #1472)
Version 4.0.0 introduces some changes that affect us as well.
So we need to read through the release notes linked in the ticket description and adapt the codebase accordingly.
Additionally, you can simpy increase the version in the POM file and check if there are any errors when running mvn clean verify .

In terms of setting up the development environment: you need to check out the repository, ensure that Maven and Java (JDK 17) are installed
With that you are alrready good to go for this task 🙂