Event callback on thread

I am trying to use psh as an object test bench for a client and service
classes I have.

Couple issues so far:

1) Using async socket reads at client. psh, however, calls Methods on a new
thread and then exits. This causes socket read to error as the thread that
started the async operation is not allowed to exit so error is thrown by
socket. A hack workaround was to call the first beginreceive on a TP
thread, not the calling thread. In a "normal" client, this is almost never
an issue as you normally start with a main thread which never goes away
(i.e. ui thread, console main thread). Surely someone has seen this before
and has some advise. That does however beg the question of how this ever
works if you post another read in the read callback which is an TP/IOCP
thread that can get collected by the Pool.

2) My server object does not have issue #1 above, as it keeps its main
thread as the accept loop. However, it does async reads also and calls a
ReadReceive event for user code to handle, the callback is a TP thread as
normal (or I think an IOCP thread). Anyway, I get this exception in psh:


"System.Managment.Automation.PSInvalidOperationException:
There is no Runspace available to run the scripts in this thread.
You can provide one in the DefaultRunspace property..."

Is there anyway I can use a psh script as an event handler in this case?
TIA!

--
William Stacey [C# MVP]

Should I restate the question? tia

--
William Stacey [C# MVP]

Sorry for the delay. Unfortunately the answer is that there's no easy way to
do what you want and no way to do it without writing some non-powershell
code (at least that I've thought of). PowerShell runspaces are
singlethreaded. If you try and execute a piece of code outside the runspace
(i.e. not on the runspace thread), you'll get the exception you saw:

"System.Managment.Automation.PSInvalidOperationException:
There is no Runspace available to run the scripts in this thread.
You can provide one in the DefaultRunspace property..."

So you'll have to write some code to forward the events to a runspace in
some manner. This type of event handling is one of the things we're actively
investigating for V.Next.

-bruce

--
Bruce Payette [MSFT]
Windows PowerShell Technical Lead
Microsoft Corporation
This posting is provided "AS IS" with no warranties, and confers no rights.


"William Stacey [C# MVP]" <william.stacey@gmail.com> wrote in message
news:upbQaloGHHA.3468@TK2MSFTNGP04.phx.gbl...
> Should I restate the question? tia
>
> --
> William Stacey [C# MVP]
>
>

Thanks Bruce.

--
William Stacey [C# MVP]