Call init() on delegate from TimedScheduler #3876
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@luukveenis Please sign the Contributor License Agreement! Click here to manually synchronize the status of this Pull Request. See the FAQ for frequently asked questions. |
The TimedScheduler class doesn't currently provide an override for the `init()` method, which means it calls the default implementation on the interface that delegates to `start()`. This works fine for most schedulers, since they have a valid implementation of `start()`. However, the newer BoundedElasticThreadPerTaskScheduler throws an error for `start()`, so wrapping it in a TimedScheduler causes it to crash immediately when `init()` gets called. We should call the wrapped scheduler's `init()` method instead, which allows users to get metrics for their virtual thread schedulers.
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@luukveenis thanks! I took the liberty to add a test to your PR. |
Sorry I meant to add one, thank you! |
chemicL
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Thank you for the contribution, @luukveenis 🚀 |
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This fixes an issue where wrapping a
BoundedElasticThreadPerTaskSchedulerwithMicrometer#timedScheduler()causes it to error out immediately.The TimedScheduler class doesn't currently override the
init()method, so it calls the default from the interface, which delegates tostart(). This works fine for other scheduler implementations because they still implementstart(), but for the virtual thread scheduler, it simply throws an error. When we wrap it in a timed scheduler, it crashes on this error as soon asinit()gets called.