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Re: [cu-dev] Behavior of virtual=true on Java SE 17
  • From: Nathan Rauh <nathan.rauh@xxxxxxxxxx>
  • Date: Fri, 2 Feb 2024 17:40:03 +0000
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  • Thread-topic: [EXTERNAL] Re: [cu-dev] Behavior of virtual=true on Java SE 17

Ivar,

That’s an interesting idea.

 

> Would it be possible to provide a warning of some kind both at compile time and runtime for Option 2?

 

At run time, yes. The spec could require implementations to log a warning at run time when seeing the annotation.  I think that would be a good idea if going with Option 2.

 

At compile time, even if there were a way to cause a warning at compile time, it would be wrong to do so because it is a valid scenario to compile your application with Java SE 17 but run it on Java SE 21.  Users should not have to receive a warning for that.

 

 

From: cu-dev <cu-dev-bounces@xxxxxxxxxxx> on behalf of Ivar Grimstad via cu-dev <cu-dev@xxxxxxxxxxx>
Date: Friday, February 2, 2024 at 11:25 AM
To: cu developer discussions <cu-dev@xxxxxxxxxxx>
Cc: Ivar Grimstad <ivar.grimstad@xxxxxxxxxxxxxxxxxxxxxx>
Subject: [EXTERNAL] Re: [cu-dev] Behavior of virtual=true on Java SE 17

On Fri, Feb 2, 2024 at 9: 09 AM Nathan Rauh via cu-dev <cu-dev@ eclipse. org> wrote: If anyone else has an opinion on what the behavior of virtual=true should be when running on Java SE 17, please comment in https: //github. com/jakartaee/concurrency/pull/415

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On Fri, Feb 2, 2024 at 9:09 AM Nathan Rauh via cu-dev <cu-dev@xxxxxxxxxxx> wrote:

If anyone else has an opinion on what the behavior of virtual=true should be when running on Java SE 17, please comment in

https://github.com/jakartaee/concurrency/pull/415

 

The options being considered are:

  1. It’s an error because Java SE 17 can’t possibly ever honor your request to use virtual threads.
  2. Ignore your request for a virtual thread on Java SE 17 and use a platform thread instead. 

 

Would it be possible to provide a warning of some kind both at compile time and runtime for Option 2?

 

I’ll leave this open for several more days, but I’d like to get a decision made one way or the other so that we can make progress on supporting Java SE 17 which is now being required by the Jakarta platform.

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Ivar Grimstad

Jakarta EE Developer Advocate | Eclipse Foundation Eclipse Foundation - Community. Code. Collaboration. 

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