Alternative to RxJavaErrorHandler

[bobvanderlinden]

I'd like to catch unhandled errors that arise from Observables globally.

The documentation here suggests to use RxJavaPlugins.getInstance().registerErrorHandler, but both getInstance and RxJavaErrorHandler are deprecated with no hints as what to use instead.

The documentation on error handling in RxJava here also has no mention of globally handling errors.

I did find RxJavaHooks.setOnError, but I have not found any documentation on this, so I was unsure whether it should be used.

Is this still on-going work or can anyone suggest what to use as an alternative to registerErrorHandler?

[aaronweihe]

The documentation on the Wiki is probably outdated. If you look at the java doc of RxJavaPlugins#getInstance(), it says

Deprecated. use the static methods of RxJavaHooks.

😄

[akarnokd]

Hi and thanks for the feedback. Those articles are a bit outdated and will be updated in a few days to better reflect the current status with 1.2.

I did find RxJavaHooks.setOnError, but I have not found any documentation on this, so I was unsure whether it should be used.

There is not much to that method. By default, undeliverable exceptions are routed to RxJavaHooks.onError which then calls an Action1<Throwable> you can change via RxJavaHooks.setOnError.

Here is the release info and the PR

[bobvanderlinden]

Thank you both for the feedback. RxJavaHooks.setOnError it is! I've made a PR that documents the new alternative (#4569).

[akarnokd]

Updated the Plugins wiki page. Let me know if it's adequate for you.

[bobvanderlinden]

@akarnokd Yes, that makes things a lot more clear. Thank you!