[Glass] Zinc Server in Gemstone

[David Temnyk via Glass]

Hello Dale!

Thank you for your help and your explanation! Now it works perfectly!

I will take some time to read that document in order to better understand
about Gem Servers.


David


2016-11-22 20:27 GMT-03:00 Dale Henrichs via Glass <
glass at lists.gemtalksystems.com>:

> David,
>
> Mariano's code was close, but not quite correct:
>
> run
> (ZnServer on: 9090) start; delegate: myApp.
> [true] whileTrue: [(Delay forSeconds: 1) wait]
> %
>
> The problem is that when control returns to the topaz prompt (or the tODE
> shell), the server process is  not running. Instead the client process
> (topaz or tODE) is waiting for input from the user. To run a server process
> in GemStone you must start your server in a forked process AND arrange to
> not return to the topaz (or tODE).
>
> With a delay loop like the one above, your server should process all of
> the requests ...
>
> The above code is a very simple zinc gem server ... as you work with
> GemStone more, you will probably find that you need to enhance the
> functionality of your "gem server" and I would recommend that you read the
> following document: "Getting started with Gem Servers"[1] to learn a bit
> more about the ins and outs or running gem servers with GemStone.
>
> Dale
>
> [1] https://github.com/GsDevKit/gsApplicationTools/blob/
> master/docs/gettingStarted.md#getting-started-with-gem-servers
> On 11/22/2016 02:52 PM, David Temnyk via Glass wrote:
>
> Hello Mariano, thank you for your answer.
>
> I tried what you said but sadly I got the same results.
>
> I can't understand why when I make a request from a Pharo Image nothing
> happens until I send another request from either the tODE shell or topaz...
>
> I must be doing something wrong but I can't figure out what it is.
>
> 2016-11-22 17:30 GMT-03:00 Mariano Martinez Peck <marianopeck at gmail.com>:
>
>> I am not sure about the following I will comment ... but... cannot it be
>> that the `eval` uses the same gem as the one running tODE and that may
>> cause some problems? Did you try running the
>>
>> (ZnServer on: 9090) start; delegate: myApp
>>
>> but from a `startTopaz` ?
>>
>> $GS_HOME/bin/startTopaz myStone -l
>>
>> Once inside topaz:
>>
>> login
>> run
>> (ZnServer on: 9090) start; delegate: myApp
>> %
>>
>>
>>
>> Cheers,
>>
>>
>> On Tue, Nov 22, 2016 at 4:27 PM, David Temnyk via Glass <
>> glass at lists.gemtalksystems.com> wrote:
>>
>>> Hi!
>>>
>>> I'm trying to port some working Pharo code to Gemstone.
>>>
>>> I have a small project which consists in sending some data from
>>> different Pharo images to another one that simply stores it in some object.
>>> In order to do that, I create a Zinc Server, make it listen on port 9090
>>> and delegate the requests to my app, like this:
>>>
>>> (ZnServer on: 9090) start; delegate: myApp.
>>>
>>> In the other Pharo images I just send POST requests like this:
>>>
>>> ZnEasy post: 'http://localhost:9090/store' data: (ZnEntity text:
>>> someData).
>>>
>>> This code is working but I'm running into some trouble trying to port it
>>> to Gemstone. So far, I have loaded and tested my app in Gemstone (without
>>> changing anything), but the server part is giving me some headaches.
>>>
>>> Right now i'm working with the gemstone shell in tODE. I tried executing
>>> there this line of code:
>>>
>>> eval `(ZnServer on: 9090) start; delegate: myApp`.
>>>
>>> After doing this, I can send post requests from the shell itself and it
>>> works, but when I try to send a request from a Pharo image I get a "Data
>>> received time out". However, when I send a POST request from the shell, all
>>> previous requests from the Pharo Images are executed and all sets of data
>>> are stored.
>>>
>>> So, if I send a POST request from a Pharo image and immediately send a
>>> POST request from the Gemstone Shell, it works: both sets of data are
>>> stored and both responses are received.
>>>
>>> But I would like it to work without having to send dummy post requests
>>> from the shell. I don't understand what goes wrong. Maybe I have to do
>>> things in a different way? I'm just starting to work with Gemstone and
>>> there are a lot of concepts that I don't quite get yet, but I'd really like
>>> to learn.
>>>
>>> What can I do in order to make it work?
>>>
>>> Thanks!
>>>
>>> --
>>> David Temnyk
>>>
>>> _______________________________________________
>>> Glass mailing list
>>> Glass at lists.gemtalksystems.com
>>> http://lists.gemtalksystems.com/mailman/listinfo/glass
>>>
>>>
>>
>>
>> --
>> Mariano
>> http://marianopeck.wordpress.com
>>
>
>
>
> --
> David Temnyk
>
>
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-- 
David Temnyk
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