Incorrect nullability definition in public APIs input

[fmbenhassine]

Several public APIs accept nullable parameters while they shouldn't. Some examples include:

• JobRepository#getJobInstance(@Nullable Long instanceId)
• JobExplorer#findRunningJobExecutions(@Nullable String jobName)

This should be fixed in v6 as part of the jSpecify support theme (#4673).

[scordio]

Hi @fmbenhassine, I already started working on the JSpecify introduction for spring-batch-core.
Should I address this point as well, or would you prefer to look into it internally? I can imagine you might want to proceed more quickly on your own to meet the next milestone.

I can also raise a draft PR with my current progress, which you can take over if it helps!

[fmbenhassine]

Hi @scordio!

I can also raise a draft PR with my current progress, which you can take over if it helps!

Yes please, so that your effort is not wasted. I will take it from there and address any breaking changes if needed.

[scordio]

#4990 raised.