On 6/26/14 7:23 AM, roger riggs wrote:
On 6/26/2014 4:55 AM, Peter Levart wrote:
- Will there be a guarantee that ProcessHandle objects returned from factory
methods: [...]
representing those processes that were started by ProcessBuilder API are
actually the same Process objects that were returned from the ProcessBuilder
API?
The initial design does not have them returning Process instances.
Process instances are capabilities and their reference accessibility is
currently controlled
by the code that created the Process. If ProcessHandle gave out those Process
instances
it would break existing encapsulation.
Hi Roger,
This is an interesting point about the undesirability of leaking Process
instances. I initially thought the relationship between ProcessHandle and
Process objects would be unspecified, and possibly left to the implementation.
But based on your comments, it sounds like the PH factories are **prohibited**
from returning any instances of Process. Thus we'd have:
Process proc = new ProcessBuilder(...).start();
ProcessHandle ph = ProcessHandle.of(proc.getPid());
assert !(ph instanceof Process);
It seems like it would be good idea to add this restriction to the
specification.
s'marks
