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Re: [Zope] Re: [Zope-dev] Proposed installation changes for review
by Jeremy Hylton 12 Mar '03

12 Mar '03

> I'm not dismissing it, and I think you need to go back and read what I > wrote again very very carefully without reading anything into it. I'm > not trying to imply that using environment variables to configure the > current codebase will reduce the code footprint. Even if it did, > because of the distributed nature of the technique, its damnedly hard > to maintain in a project as large as Zope. Also, I didn't say ZConfig > was 374k of code, I said it was 374k of *work*. I chose that word > very carefully, and obviously thats going to err on the side of > conservatism as certainly the work was not isolated to that single > directory tree. I don't know what work means in this context, but think the ZConfig project is thorough. In my checkout there are 180k of document, 180k of unit tests, and 136k of code. A measure of work that suggests that something with 0k of documentation and tests and 136k of code would be better makes no sense to me. > The point I'm trying to make is that Zope has learned nothing from the > UNIX philosophy. Yes, you can extend the config schema. You can grow I don't see where the UNIX philosophy has anything useful to say about configuration, but maybe I'm just a closet unix hater <0.5 wink>. > new, better config files, of extraordinary magnitude. The > all-powerful server will grow from being all-powerful to being > all-powerful + n. It will be able to read mail. Its heralds shall > sit upon mountain high throwns hewn of the finest O'Reilly and New > Riders scripture. But lo, still you won't be able to do something as > mundane as limit the memory the FTP server is able to consume without > affecting the HTTP server. > Fracture the server infrastructure into small, seperate processes. > The configuration of the individual pieces becomes trivial. The > understanding of the overall data flow improves. When there's nothing > left to remove from code, you've won. Some of the breaks have already > been made, like the separation of the storage from its front-end. > Thats good, we need more action along those lines. I don't see that configuration gets any easier if you have multiple processes. Even if Zope had N processes, there would still be the same amount of stuff to configure. You'd probably still want a single master config file for the whole thing, and a tool to check the configuration is valid separate from the process that uses the file to configure itself. As I watched everyone working on the ZConfig project, I was impressed with how many issues are involved in getting a decent configuration system. I don't think that break the server into multiple pieces would make it easier to configure, and I don't see what requirements could have been eliminated to make the project take less work. Jeremy

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Re: [Zope] Understand ZODB Query?
by Heri 12 Mar '03

12 Mar '03

you're right, i'm still thinking tabularly. I'm basically looking for ways how to do database query (select, update, create, etc). Of course i'm still thinkin in 'relation database' way as I'm just starting with OODB. >From my latest reading, the ZODB works like a 'dictionary': -In this way, I can save any objects into this dictionary. -the key for the dictionary is the 'unique key' while the value is the object. -In order to perform any query, I need to parse through the dictionary My questions: -wouldn't it be too slow? -How if I don't need any key? -How if I have multiple keys? This doesn't seem so easy. Probably I need to read ZCatalog and get some understanding from its query. thanks. Heri > > - I can easily perform SQL statement to lookup for some information > such as, total employee, who are above 30 years old, and who has the > Lastname of 'Smith'. > - I can easily retrieve information from multiple tables and combine > it as data objects. > > But how can I do this in ZODB? 1) If your data set is not too big, you can do it programmatically Python: set = folder.objectValues() results = [] for elt in set: if (elt.age > 30) and (elt.lastname=='Smith'): results.append(elt) return elt One can easily replace '30' and 'Smith' with parameters to get a more useful script. 2) Use ZCatalog for this if you have larger sets to avoid unnecessary traversals. But I suspect the larger problem is that you're thinking tabularly. Trying to make a 1-to-1 translation between an object-storage scheme and a relational-storage scheme isn't always (or maybe usually) going to work. I know no magic processes for this, unfortunately. --jcc

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Re: [Zope] New Product Help
by J Cameron Cooper 12 Mar '03

12 Mar '03

> > >I said exactly what I am trying to do. I need a program that creates a root folder in Zope. I need a function in that program to be called to authorized access to that folder. > >I would like to create this in some way without modifying the core code for Zope. I don't know whether that means I need a product or interface or something else. > >I would appreciate some help with this. > > A point of terminology, just to make sure we're communicating the same concepts: there is and can only be only one root in a Zope installation. You cannot have more than one in an installation. Dead impossible. Perhaps you can understand why it's confusing to say you want to add a "root folder". If what you're aiming for is a direct child of that root, a top-level folder, if you will, that's not so tough. E.g. say we have the following: / (the root) -- folder1 -- object1a -- folder2 -- folder2a -- folder2b -- folder3 -- object1 folder1, folder2, folder3, and object1 are all children of the root, or top-level objects. They are what you see when you look at http://localhost/manage . The rest are not. If what you want to do is be able to create some folder on the same level as folder1, and also have a method to do something to it, all you need is: Python Script folderCreate parameters: id, title here.manage_addFolder(id,title) # you can do whatever else you need to do here, # like restrict permissions return "Folder " + id + " created" # you can also return the rendering of some object or do a redirect here Put this in the highest level you're operating on (in this case the root), and you can call it to create your folder in whatever context you call it on. In an HTML form, an action of "/folderCreate" along with id and title parameters would create a folder with your id and title in the root. An action of /folder1/folderCreate would make the folder a child of folder1. The equivalents in Python Scripts would be root.folderCreate(id,title), and root.folder1.folderCreate(id,title). You can make a similar Python Script to manipulate security. You might change the permission for a certain role or add a local role or whatever it is you want to do. This could also be a Product: subclass Folder, override Folder's security with your settings, have the manage_add... set up whatever else you need, and add a method that changes that security. You could then call manage_add... directly or through the ZMI to make your new type of folder.

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doctors agree on this 8437HMgS5-650GBQi667-19
by inkshop_world_ql254＠excite.com 12 Mar '03

12 Mar '03

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RE: [Zope] zope benchmarks now available
by Samir Mishra 12 Mar '03

12 Mar '03

It's a great start. Thanks. I find it very helpful. I'm also very curious about performance on dynamic content. My experience has been, and I think I'm not alone in this, that even with my rarefied understanding of the capabilities of Zope, I find myself exploiting it's advantages. I don't think I have a single static page on my site. I think it's more to do with mindset. I just don't think in terms of "static" pages, I'm more concerned with the logic than the presentation. In fact some of my pages are extremely complex. Perhaps much more than they need to be, but I'm still learning. Another comment I need to make - this is through experience with my manager. On http://www.zope.org/Members/BwanaZulia/zope_benchmarks/benchmarks.html the key statement is "Tomcat is 2x or 3x faster than Zope when execute an SQL query", the key words being "SQL query". Not pages. Even I missed that first. I'm stating the obvious here, but sometimes even the obvious needs to be restated. And a suggestion - I'd be very interested to know if the above was (still) true for DB access. One piece of logic we frequently use here is to generate a form with default values that are dynamically extracted from a database. Explanation - we have some very lengthy forms. Since we don't expect users to complete them in one go, we give them the option of storing whatever they enter in a session in the DB. And each time the user wishes to update the information, the input form is dynamically generated with SQL query variables (I'm still using <dtml-sqlvars ...> which is slower than the alternatives, but like I said earlier, I'm still learning) being used as default values. Thanks again. Regards, Samir. -----Original Message----- From: J Cameron Cooper [mailto:jccooper@jcameroncooper.com] Sent: Wednesday, March 12, 2003 03:02 To: zope(a)zope.org Subject: [Zope] zope benchmarks now available A little while back I promised to run some benchmarks. Took a little while longer than I thought, and there is a lot to be desired, but I have published the preliminary results. My results (unfortunately) don't agree with the qualitative results of http://www.zope.org/Members/BwanaZulia/zope_benchmarks/benchmarks.html I imagine the more thorough tests I have planned will reveal more. Anyway, if you like numbers (and who doesn't?) you can find my results at http://zopeedge.com/benchmarks It's a little earlier than I had planned to make the site publicly known, so be well warned that the only thing there that really works is the benchmark area. --jcc _______________________________________________ Zope maillist - Zope(a)zope.org http://mail.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://mail.zope.org/mailman/listinfo/zope-announce http://mail.zope.org/mailman/listinfo/zope-dev )

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Best way to run multiple sites in one Server
by Mico Siahaan 12 Mar '03

12 Mar '03

Well, it's a sys admin newbie question ;) I have just been handed over a server with some sites in it (not many :) ). I wonder what is the best way to run multiple sites on one computer? I heard some ways: multiple zope server running in simultaneously, using virtual monster, using PCGI, using Fast CGI. What are pros and cons for each way? What is the best way to run multiple zope sites in one computer? Are there any reading materials I can read about this matter? (I think the old Zope Administrator Guide is not enough :) ) Thanks for your help. -- mico(a)intermatik.co.id -- www.intermatik.co.id ICQ #12521756

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iCalendar Projects?
by Steve McMahon 12 Mar '03

12 Mar '03

Does anyone know if the are any active Python or Zope iCalendar projects? I found a couple of zombies on SourceForge, but nothing more.

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dtml-var with a propertys reference
by Einar Næss Jensen 12 Mar '03

12 Mar '03

In one of my zclasses I have a property "link_file" which holds a filename/objectID. if this property says "alit.html", then In my dtml-method I want do do something like: <dtml-var link_file> and then it should render the content of "alit.html", but of course it only renders the text "alit.html". what is the right syntax to reference the object which the property references to and not the text? Best regards, Einar Næss Jensen -- Einar Næss Jensen Avdelingsingeniør EDB-HF 735 90750

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New Product Help
by Matt Ficken 12 Mar '03

12 Mar '03

I am trying to create a new zope product. I need to make a root level folder but have a function within my product called to approve access and changes to that folder. But, I don't even know how to make the root level folder. I would really appreciate help. -- __________________________________________________________ Sign-up for your own FREE Personalized E-mail at Mail.com http://www.mail.com/?sr=signup

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Cannot redistribute ZClass product
by pieter claassen 12 Mar '03

12 Mar '03

For some reason, I packed my ZClass product and installed it on a new machine. I thought I gave myself the permissions to modify and further redistribute the product, but alas, when I tried to pack it again on my new machine, it told me that I didn't have permission to redistribute the product. 1. Did I screw the packing up or does this happen normally? 2. How do I hack my product to be able to edit and pack it again for distribution? Thanks, Pieter

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