JEP 102 Process Updates revised API draft

[Roger Riggs]

Hi David,

Thanks for the suggestion:

"Forcible process destruction is defined as the immediate termination of 
a process, whereas regular destruction allows a process to shut down 
cleanly."

It is very OS and application specific as to how and if an application 
does cleanly exit
but adding qualifications would make it less readable.

Roger


On 2/10/2015 8:17 AM, David M. Lloyd wrote:
> On 02/09/2015 07:52 PM, Roger Riggs wrote:
>> On 2/9/15 6:44 PM, David M. Lloyd wrote:
>>> Also, as a general comment, there isn't really a good explanation as
>>> to what the difference is between a normal destroy and a forcible
>>> destroy.  Given that you've added an isDestroyForcible() method, I
>>> think it might be a good idea to explain what it means when this
>>> method returns true.  There must be some criteria in the
>>> implementation to return true here, so at the least, that criteria
>>> should be explained.  Also the destroy() method now has the odd
>>> characteristic that its implementation *may* forcibly destroy a
>>> process, but you can't really determine that from the API at all.
>>
>> From an implementation perspective, for Unix it is the distinction
>> between SIGTERM and SIGKILL;one is allowed/expected to be caught and 
>> handled by the application for
>> a clean shutdown,the other is not interceptable. But the OS 
>> variations and caveats make 
> it hard to write anything more
>> than an informative statement.
>
> Understood, but I'm thinking that such a statement should be added; 
> something along the lines of "Forcible process destruction is defined 
> as the immediate termination of a process, whereas regular destruction 
> allows a process to shut down cleanly."  This gives a clear criterion 
> as to what it means when isDestroyForcible returns true, since each of 
> these behaviors (at least on Unix) are readily identified with SIGKILL 
> and SIGTERM.
>
> Upon rereading the API I see that isDestroyForcible() actually 
> reflects the behavior of destroy(), which is opposite of my original 
> reading of it, and that clarifies things a bit.  But there is still no 
> way in the API to know if forcible process termination is supported; 
> can it be assumed that it is supported on all platforms?
>
>> The descriptions are copied from Process, which previously did not offer
>> an explanation.
>