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Zinc: Detect failed binds

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Mark Smith

Zinc: Detect failed binds

Hi :),

Does anyone know if there's a way to detect if a Zinc Server doesn't bind to a port, (probably because there's already a server listening on that port), and signal an error?

Thanks a lot,

Mark

Sven Van Caekenberghe

Re: Zinc: Detect failed binds

Mark,

On 13 Jun 2012, at 12:09, Mark Smith wrote:

> Hi :),
>
> Does anyone know if there's a way to detect if a Zinc Server doesn't bind to a port, (probably because there's already a server listening on that port), and signal an error?
>
> Thanks a lot,
>
> Mark

Good question.

Try

server isRunning & server isListening

as is done by most unit tests using #withServerDo:

HTH,

Sven

--
Sven Van Caekenberghe
http://stfx.eu
Smalltalk is the Red Pill

Mark Smith

Re: Zinc: Detect failed binds

Thanks Sven. That's working now :).

On 13 Jun 2012, at 11:22, Sven Van Caekenberghe wrote:

> Mark,
>
> On 13 Jun 2012, at 12:09, Mark Smith wrote:
>
>> Hi :),
>>
>> Does anyone know if there's a way to detect if a Zinc Server doesn't bind to a port, (probably because there's already a server listening on that port), and signal an error?
>>
>> Thanks a lot,
>>
>> Mark
>
> Good question.
>
> Try
>
> server isRunning & server isListening
>
> as is done by most unit tests using #withServerDo:
>
> HTH,
>
> Sven
>
> --
> Sven Van Caekenberghe
> http://stfx.eu
> Smalltalk is the Red Pill
>
>

Ben Coman

Re: Zinc: Detect failed binds

In reply to this post by Mark Smith

Mark Smith wrote:
> Hi :),
>
> Does anyone know if there's a way to detect if a Zinc Server doesn't bind to a port, (probably because there's already a server listening on that port), and signal an error?
>
> Thanks a lot,
>
> Mark
>
>
As a backup plan... why not from one code path (perhaps requiring a fork)
1. start Zinc Server
2. generate random magic number
3. connect to server as a client requesting magic number.
4. check returned magic number matches the one from (2)