Re: [Zope3-Users] Reportlab threadsafe solution?
One way is to use another tool. If you look at it just right, lpr is a general purpose job scheduler. It checks a lock resource, and allows only one job to acquire the lock, etc. The best cookbook I can find to this idea is: http://www.faqs.org/docs/Linux-mini/Fax-Server.html Your main problem then becomes how to efficiently detect that the spooled job is finished. jim penny [EMAIL PROTECTED] wrote on 09/26/2006 09:14:11 AM: Hi I need to produce PDFs with reportlab. reportlab is not threadsafe. (http://two.pairlist.net/pipermail/reportlab-users/2006-June/005037.html) I think I need a way to queue or generate a lockfile on requests for PDFs so that only one-at-a-time is generated. I'm hoping that there is a utility for this already, but search in the source for queue or serialize or lock gets me a lot of stuff that does not seem to relate to what I want. This looks like it would be a relatively simple utility. Has this been done yet? Any hints? -Jim Washington ___ Zope3-users mailing list Zope3-users@zope.org http://mail.zope.org/mailman/listinfo/zope3-users ___ Zope3-users mailing list Zope3-users@zope.org http://mail.zope.org/mailman/listinfo/zope3-users
Re: [Zope3-Users] Autocreated content objects
On 9/25/06, Stephan Richter [EMAIL PROTECTED] wrote: On Monday 25 September 2006 03:21, John Maddison wrote: Is it possible/wise to auto-create content objects in the ZODB? Say I'm creating a blog application and have a container type(BlogContainer) and want an instance called blog in the root of the ZODB. Is it possible to programatically specify this, or is my only option to create it through the ZMI? I thought that perhaps an event was generated when the root object was created that I could hook into, but it seems not. Perhaps I'm looking at this the wrong way - would fixtures like this be better implemented as utilities with z3c.traverser redirecting to appropriate views? It is very much a goal of Zope 3 to allow Python-based content adding; in fact, I am never adding content via ZMI these days. The closest I get to the ZMI is the Sample Data generator that creates a full application for me. By the way, much thanks to SchoolTool, Roger and Juergen who have developed this concept. We also use the configurator to configure complex content objects. Hm...a few thoughts on this: firstly,. if you're using this in a production application, the module name seems a bit misleading :). Secondly, I'd've expected the context that gets passed t the plugin would be either the sample object itself or the root object, but it seems to be none - how can I get the root object? Finally, it seems to make the problem a bit more indirect, but still there - how could I automatically create a SampleManager on startup? With the new event (I gather that would work - I guess I'm askign what the best practice would be, if in fact I'm not trying to do something silly to begin with)? So to answer your specific question: There is an event fired when the database is opened with the root. See zope.app.appsetup.bootstrap, line 193. Hoever, I agree that an created and add event should be created for the root folder in the same function. Could you file a bug report, or even better provide a fix with test? :-) Fred already did it :) Also, thank you to everyone for your quick and varied answers - zope3 is generally fairly well documented at the code level, and it's great to know it's easy to find answers to more architecture-y questions, too. ___ Zope3-users mailing list Zope3-users@zope.org http://mail.zope.org/mailman/listinfo/zope3-users
Re[2]: [Zope3-Users] filter possibilities
thank you Chris, at least you've answered ... but yesterday i've spent all my day to figure out how the hurry.query works without success - may be that was the reason if i was a little bit ironic - sorry for that unfortunatelly i don't know too much about zope, but i would like to learn its capabilities i really don't know how to raise my question in a different way, i think i was specific enough i'm still waiting for a hint ... *** REPLY SEPARATOR *** On 26/09/2006 at 11:00 Chris Withers wrote: Ivan Horvath wrote: Is there anybody out there? Plenty. why haven't i received any answer? Because no one understood the question, or maybe no one knew the answer, or just maybe nobody had time or nobody felt like it... i thought this list is to raise question if i don't know something, Sure :-) and i need some help to continue my work with Zope3 That's okay, but this is a volunteer list, if you need stuff to be done and you're not getting answers, hire a Zope 3 consultant... Chris -- Simplistix - Content Management, Zope Python Consulting - http://www.simplistix.co.uk Best regards, Ivan Horvath Chief Programmer Alcatel ISD PMS 2000 Product Team H-1116, Budapest Kondorfa u. 10. Tel.: +36 1 209 9546 Fax.: +36 1 209 9599 Mobil: +36 30 257 0235 VOIP: +49 511 676 478010 [EMAIL PROTECTED] Anyone who has never made a mistake has never tried anything new. /Albert Einstein/ ___ Zope3-users mailing list Zope3-users@zope.org http://mail.zope.org/mailman/listinfo/zope3-users
Re: [Zope3-Users] Autocreated content objects
On 9/26/06, John Maddison [EMAIL PROTECTED] wrote: Right, that's basically what I want to run, but I can't seem to figure out how to have that run at ZODB creation time. Should I be listening for the event that Fred added (thanks!) and run that in the subscriber? There are a couple of ways to go about this with the current codebase: 1) Listen for the IDatabaseOpenedEvent, and make sure you get there before the default subscriber does. Add your root before the default root is created. 2) Listen for the IDatabaseOpenedWithRootEvent, and be willing to replace the application root. You need to be sure that you're replacing it with an object that will support all the things you expect, since the default is an actual ISite implementation. (Not sure just how important that really is, though. Lots of code will expect it to be, but hopefully nothing really fundamental.) My proposed new event is what you really want, since it would only be triggered when an application root is needed. But I'd like some assurance that I'm not the only one who thinks that's the right approach before I bang out tests and code. -Fred -- Fred L. Drake, Jr.fdrake at gmail.com Every sin is the result of a collaboration. --Lucius Annaeus Seneca ___ Zope3-users mailing list Zope3-users@zope.org http://mail.zope.org/mailman/listinfo/zope3-users
Re: [Zope3-Users] filter possibilities
I'm no expert on this... In fact I often find myself struggling to get
cataloging in Zope3 to do what I want in a painless way (which is
probably why hurry exists...). Experts please correct me if I'm doing
anything objectionable...
I'm assuming that you've got an IntIds utility and a catalog,
and I'm assuming that in your catalog is a FieldIndex which uses
IZopeDublinCore...
If not the following _may_ provide a little help:
from zope.app.catalog.interfaces import ICatalog
from zope.app.catalog.catalog import Catalog
from zope.app.catalog.field import FieldIndex
from zope.app.dublincore.interfaces import IZopeDublinCore
from zope.app.component.hooks import getSite
from zope.app.component.site import UtilityRegistration
from zope.app.component.interfaces.registration import ActiveStatus
from zope.component import provideUtility
# Find your site's manager and get the default tool folder
sm = getSite().getSiteManager()
smf = sm['default']
# make a catalog and put it in the folder
catalog = Catalog()
smf['My Catalog'] = catalog
# Register the new catalog so that its available for use
reg = UtilityRegistration('', ICatalog, catalog)
smf.registrationManager.addRegistration(reg)
reg.status = ActiveStatus
# Use provide utility so that the catalog is ready for use
provideUtility(catalog, ICatalog)
# Add a Field index which will catalog the creation time of objects
index = FieldIndex('created', IZopeDublinCore)
catalog['Date Created'] = index
Once your catalog has indexes and they're indexing objects then you can
start trying queries. Here's an attempt at a query to find all indexed
objects created in the last 10 days:
from zope.app.catalog.interfaces import ICatalog
from hurry.query.interfaces import IQuery
from hurry.query import Ge
import datetime
#Grab our catalog and query utilities
catalog = getUtility(ICatalog)
query = getUtility(IQuery)
# make a tuple to tell hurry which catalog and index we want to use
index = (catalog, 'Date Created')
# make a datetime object (in my timezone) to find out when
# 10 days ago was...
now = datetime.datetime.now(pytz.timezone('GB'))
then = now - datetime.timedelta(10)
results = query.searchResults(Ge(index, then))
Good Luck,
Rupert
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Re: [Zope3-Users] Re: Reportlab threadsafe solution?
Why not just use a mutex (a recursive lock makes things easier too)? lock = threading.RLock() lock.acquire() try: ... finally: lock.release() On Sep 26, 2006, at 9:19 AM, Philipp von Weitershausen wrote: Jim Washington wrote: Hi I need to produce PDFs with reportlab. reportlab is not threadsafe. (http://two.pairlist.net/pipermail/ reportlab-users/2006-June/005037.html) I think I need a way to queue or generate a lockfile on requests for PDFs so that only one-at-a-time is generated. I'm hoping that there is a utility for this already, but search in the source for queue or serialize or lock gets me a lot of stuff that does not seem to relate to what I want. This looks like it would be a relatively simple utility. Has this been done yet? Any hints? You may want to look at zc.queue: http://svn.zope.org/zc.queue/ trunk/src/zc/queue/queue.txt?rev=67933view=auto ___ Zope3-users mailing list Zope3-users@zope.org http://mail.zope.org/mailman/listinfo/zope3-users ___ Zope3-users mailing list Zope3-users@zope.org http://mail.zope.org/mailman/listinfo/zope3-users
[Zope3-Users] Reportlab threadsafe solution?
Hi I need to produce PDFs with reportlab. reportlab is not threadsafe. (http://two.pairlist.net/pipermail/reportlab-users/2006-June/005037.html) I think I need a way to queue or generate a lockfile on requests for PDFs so that only one-at-a-time is generated. I'm hoping that there is a utility for this already, but search in the source for queue or serialize or lock gets me a lot of stuff that does not seem to relate to what I want. This looks like it would be a relatively simple utility. Has this been done yet? Any hints? -Jim Washington ___ Zope3-users mailing list Zope3-users@zope.org http://mail.zope.org/mailman/listinfo/zope3-users
Re: [Zope3-Users] filter possibilities
Ivan Horvath wrote: Dear All, i have to provide some filter function in our system. i've checked the hurry.query solution e.g. obj1.property = As Built Documentation obj2.property = Planning Documentation obj3.property = As Built Drawing i would like to filter my objects in the following ways: filter for substring. when i make a filter for this property with the following expr.: As Built i would like to get obj1, obj3 back as result how is it possible? query.Eq or AnyOf doesn't give back anything. You may want to look at hurry.query.Text. If you index something using a full text index (from zope.app.catalog.text import TextIndex) you can do such partial matching. This does presume you do have the intids and catalog all set up in your own code. Does hurry.query.Eq work when you feed it a complete text, such as As Built Documentation? It may also be that you want to reorganize your objects slightly so that you have *two* fields, one 'As Built' and one 'Document' or 'Drawing'. It could be that you're trying to put information into one field that really should be in multiple fields. If you do that, you can use the Field index and query.Eq. Good luck! Regards, Martijn ___ Zope3-users mailing list Zope3-users@zope.org http://mail.zope.org/mailman/listinfo/zope3-users
Re: [Zope3-Users] filter possibilities
Best regards, Ivan Horvath Chief ProgrammerAlcatel ISDPMS 2000 Product TeamH-1116, BudapestKondorfa u. 10.Tel.: +36 1 209 9546Fax.: +36 1 209 9599Mobil: +36 30 257 0235VOIP: +49 511 676 478010[EMAIL PROTECTED]Anyone who has never made a mistake has never tried anything new./Albert Einstein/ ___ Zope3-users mailing list Zope3-users@zope.org http://mail.zope.org/mailman/listinfo/zope3-users
Re: [Zope3-Users] Autocreated content objects
Oops, forgot to CC the list. On 9/27/06, John Maddison [EMAIL PROTECTED] wrote: On 9/26/06, Fred Drake [EMAIL PROTECTED] wrote: On 9/26/06, John Maddison [EMAIL PROTECTED] wrote: Right, that's basically what I want to run, but I can't seem to figure out how to have that run at ZODB creation time. Should I be listening for the event that Fred added (thanks!) and run that in the subscriber? There are a couple of ways to go about this with the current codebase: 1) Listen for the IDatabaseOpenedEvent, and make sure you get there before the default subscriber does. Add your root before the default root is created. 2) Listen for the IDatabaseOpenedWithRootEvent, and be willing to replace the application root. You need to be sure that you're replacing it with an object that will support all the things you expect, since the default is an actual ISite implementation. (Not sure just how important that really is, though. Lots of code will expect it to be, but hopefully nothing really fundamental.) Ah, I think I may have misdescribed what I was trying to do - I'm not trying to replace the root object, I'm trying to automatically create some other objects to put inside it (without having to use the ZMI). ___ Zope3-users mailing list Zope3-users@zope.org http://mail.zope.org/mailman/listinfo/zope3-users
