Database drivers added to ext-dependencies are not found

[mikub]

Titanoboa uses C3p0 connection pool and due to this bug swaldman/c3p0#105 any DB driver classes have to be loaded on the main class loader.

This means that any DB drivers you put into ext-dependencies will not be recognized by C3p0 and would have to be put into project.clj dependencies.
This requires re-build and is not in line with how Titanoboa is intended to be used (i.e. modular & easily extensible).

E.g. Postgres driver used in the following example https://github.com/mikub/titanoboa/wiki/Server-Configuration#non-core-systems has to be currently put into project.clj dependencies - or simply just copied into the /lib folder (the easiest workaround).

[mikub]

I created a clone of c3p0 with the bug fix. Since the main repo seems reluctant with releasing this fix here is a build with it:
https://clojars.org/io.titanoboa/c3p0

So far using this dependency seems to fix the issue.

[mikub]

This still does not seem to fix the issue in all test cases (e.g. in test mode from repl this works but in standalone server mode it does not).

[mikub]

Seems like the branch I deployed to clojars still did not have the patch.
However was able to find a patched version here:
https://mvnrepository.com/artifact/org.mule.mchange/c3p0/0.9.5.2-MULE-002

It is in Mule's mvn repo: https://repository.mulesoft.org/releases/

As far as this one is available no need to repackage and redeploy the patch to clojars then.

[mikub]

This is now fixed in 1.0.0.-alfa.1