Re: Initializing the pool?

On Apr 10, 2007, at 1:36 AM, Jonathan Ellis wrote:

> On Tue, 10 Apr 2007 00:49:02 -0400, "Philip Semanchuk"
> <[email protected]> said:
>> I have another problem that I hope you can help me with. I'd like to
>> write some code that would run once at server start to put some data 
>> in
>> the pool. I tried adding an InitializePool module to the list of
>> imports in spyceconf.py, but I can't figure out how to manipulate the
>> pool from a vanilla Python module. This code gives me a handle to a
>> pool-ish object:
>>
>> import spyce
>> server = spyce.getServer()
>> pool = server.loadModule("pool")
>>
>> # But this gives me "object does not support item assignment"
>> pool["foo"] = "pepperpot"
>
> loadModule returns the module class, not an instance tied to the 
> current
> request.  (that is what the "api" hook gives you, but since the server
> is still starting up at this point that doesn't help here.)
>
> But since it's just a python dict in threaded mode you can do this
>
> import pool
> pool.dictpool['foo'] = ...

Thanks. I'm a little reluctant to write code that relies on the 
internals of the pool module, but I tried this anyway. Unfortunately I 
didn't have any luck. I tried this code in both a module that I 
imported via the imports=[] statement in spyceconf.py and also directly 
in spyceconf.py

import pool

s = "/tmp/PoolLog.txt"
try:
     pool.dictpool["foo"] = "pepperpot"
     file(s, "w").write("pepper in pool")
except Exception, ErrorInstance:
     ErrorInstance = str(ErrorInstance)
     file(s, "w").write(ErrorInstance)

In both cases /tmp/PoolLog.txt indicated that I had successfully 
assigned to pool["foo"] but once the server was up and running, this 
Spyce page showed an empty list as if the assignment never happened:

[[.import name=pool]]
<p>[[=pool.keys()]]</p>


> You can also add on-startup stuff to the globals dict in spyceconf.py;
> those keys will be directly available in .spy pages, e.g.
>
> [[= foo ]]
>
> and as attributes of api for handlers or .spy pages.

I was wondering about that -- aside from pickle/unpickle support in 
non-threaded modes, how is the pool module different from simply adding 
a pool to the globals in spyceconf.py as below?

MyPool = { }
globals = { 'MyPool': MyPool }


I hope I'm not asking too many questions. Thanks for all the help.

Philip


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