[Discussions] When cache get removed from disk/storage ?

[dannndi]

Hi, I want to clarify how disk cache cleanup works in ExtendedImage.
From the documentation:
/// The max duration to cache image.
/// After this time the cache is expired and the image is reloaded.
Duration? cacheMaxAge;
My understanding was that when cacheMaxAge is reached, the previous
cached image on disk would be removed.

My speculation is

• the image is re-downloaded when expired (due to app document keep growing in size)
• but the old cache file stays in the temporary directory
• this causes the cache size to grow continuously over time (hundreds of MB → 1GB+)

Questions:

1. Is ExtendedImage expected to automatically delete old expired cache files?
2. If not, what is the recommended approach for disk cleanup?
3. Should developers run clearDiskCachedImages(duration: ...) manually on app startup or via a background job?

Thank you!

[zmtzawqlp]

Hello! Thank you for your question. Regarding the disk cache clearing mechanism of ExtendedImage, your understanding is correct. When cacheMaxAge is reached, the images in the cache are indeed considered expired. However, by default, ExtendedImage does not automatically delete these expired cache files, which may cause the cache size to grow over time.

In response to your question, here are some suggestions:

1. Automatically delete expired cache files: Currently, ExtendedImage does not provide a feature to automatically delete expired cache files. Therefore, if you need automatic cleanup, you may need to implement this functionality manually.

2. Manually clear cache: You can manually call clearDiskCachedImages(duration: ...) at application startup or through a background task to clear the expired cache files. This is a recommended approach, especially when the application's cache size becomes too large.

3. Regular Cleanup: To prevent the cache from growing indefinitely, you can set up a regular cleanup mechanism, such as cleaning up expired cache files when the app starts or at regular intervals.

I hope these suggestions help! If you have more questions or need further assistance, feel free to ask.