Local cache using EhCache

[aberenguel]

While running some tests with EhCache, I observed very promising results.
This issue was motivated by discussions in PR #2439 .

Initially, the goal was to replace SQL code in AbstractTranscriptTask.java and OCRParser.java. This resulted in significantly simplified code. Later, I expanded the implementation to make cache parameters configurable. It’s now possible to define the size of the three cache tiers:

• Heap
• Off-heap
• Persistent

Additionally, there's now an option to configure the cache location:

• Global: stored in $HOME/.iped
• Temporary: stored in a temp directory

I will submit a pull request shortly with the related code changes.

[lfcnassif]

Thanks @aberenguel!

Have you heard about https://github.com/jankotek/mapdb ? We used it successfully in IPED in the past. If yes, any particular reason to use EhCache instead of MapDB?

[aberenguel]

Thanks @aberenguel!

Have you heard about https://github.com/jankotek/mapdb ? We used it successfully in IPED in the past. If yes, any particular reason to use EhCache instead of MapDB?

I didn't know MapDB, just checked the code superficially right now.

The main reason I went with EhCache instead is because MapDB didn’t seem to support multi-tier caching — meaning it couldn’t automatically move data between heap, off-heap, and disk.
EhCache handles that out of the box, making it easier to manage memory and performance without needing to implement that logic manually.