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LoginManager Help.
by Jason C. Leach 27 Nov '00

27 Nov '00

hi, So I have LoginManager installed. The easy part. Now I'd like to know how to use it. To start with, I'd like to authenticate against a standard acl_users folder or a plane text file w/ username/passwords in it. I just have no idea how to get cracking on this since the documentation on LoginManager is pretty short. I don't mind doing the SQL method, if I don't have to install a 3rd party Database like mySQL or Postgres. It's a bit of an overkill so several users. Thanks, j. ...................... ..... Jason C. Leach ... University College of the Cariboo. ..

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is it possible to see whether any user is using a perticular zope object
by subrahmanyan kalathur 27 Nov '00

27 Nov '00

hello , I am subrahmanyan. I am using zope for my project. Now I would like to know is it possible to know if any body is using the zope object. I mean , if one user is running one DTML method , I want to know that one user is using that object. Is there any DTML tag for that. thanks. bye yours, K.H.Subrahmanyan ( subrahmanyan.kalathur(a)wipro.com )

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Re: [Zope] Python and EJB (J2EE)
by Hung Jung Lu 27 Nov '00

27 Nov '00

>1) EJB's are TRANSACTIONAL components (MTS components are also >transactional) Thanks for your comments. Transaction certainly is one of the important features of EJB. But my personal opinion is that instance pooling (multi-threading) is even more important. If you have to implement a components server from scratch, and you can only do so much, which feature would you implement first? Transaction? Or Multithreading? I think the answer is Multithreading. >All this can be specified in a deployment-descriptor - an XML >"properties" file. Yeap. :) XML "properties" file is the way to go. For many things. > Thus multiple database servers at different sites on the net can >participate in a single transaction. This implicitly involves TWO-PHASE >COMMIT and XA/TX interfaces. In plain words, if one database engine in a >distributed transaction decides to rollback, all other engines must >rollback as well. Two-phase commit is crucial. That's why I explicity mentioned it in my original message: the final commit must be done in matter of milliseconds, if not microseconds. Let's face it, the commit action takes time. There is never a 100% sure trasaction. NEVER EVER, since the transaction can fail exactly when you are performing the commit action. So the next best thing to do is to commit in two phases: (1)prepare to commit: which can take a few seconds to prepare everything up to the point of hanging all the transaction changes on one single index field (a few bytes), (2) Final commit: modify those few bytes, which on a single machine means of the order of nano-seconds, and on distributed transaction, microseconds to milliseconds. Milliseconds certainly is still not very comforting, but it beats a commit action that takes 30 or 40 seconds that is totally unacceptable in business. >Hence EJB's can potentially participate in DISTRIBUTED TRANSACTIONS. Yes, totally agree with you. >4) ENTITY EJB's allow programmatic access to database rows That's the object mapper. I am not sure, though, whether it's the best approach to put the object mapper as part of the Components Server. The fact that even SUN's own people recommend against using entity beans tells me a lot. Object mapper can be used as an independent utility, outside the Components Server. >We need more of these for transactional components. However I think >before that Zope will need to evolve to include the next level of >sophistication in DB transaction >management, especially two-phase commit, XA/TX ..., support for existing >transaction co-ordinators, and/or provide one. I've mentioned two-phase commit to Digicool people. Not sure whether it's already inside Zope or not, but it seems not. Zope's TM (Transaction Machinery) does not seem to be two-phase. See the TM.py file itself: it only has def _finish(self): self.db.commit() That is, I don't see the equivalent of prepare_to_commit(). If you know where to get more info on XA/TX, could you provide some pointers? thanks, Hung Jung _____________________________________________________________________________________ Get more from the Web. FREE MSN Explorer download : http://explorer.msn.com

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Instance within Instance
by Daryl Stultz 27 Nov '00

27 Nov '00

Hi Folks, I have a product folder called "TestClass" with 2 ZClasses: class1 and class2. The following is an exerpt from the class1 constructor: <dtml-with "class1.createInObjectManager(REQUEST['id'], REQUEST)"> <dtml-call "REQUEST.set('id', 'myClass2')"> <dtml-call "class2_add(_.None, _, NoRedir=1)"> </dtml-with> I want class2 to be created INSIDE of the class 1 instance. Instead, class2 (always with an id of "myClass2") is created at the same level as the class1 instance. How do I change the namespace to get the class2 instance inside class1? Thanks. -- "I ain't no stewin' rabbit, I'm a fricassein' rabbit. Have you got a fricassein' rabbit license?" Daryl Stultz - python, blender, robots, really bad harmonica playing... daryl(a)together.net RedHat Linux 6.1 - Dual Pentium Pro

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security
by Bowyer, Alex 27 Nov '00

27 Nov '00

Can some one explain how the Define Permissions screen works. I really don't understand the concept behind it, what does it mean for a permission setting to own a permission? All I need to do is to make certain ZClass methods have a certain level of security and the other methods of the class have no security. Any tips, advice or best of all EXAMPLES most appreciated! Thanks Alex ================================== Alex Bowyer IT Contractor, Logica Australasia Tel : +61 2 9202 8130 Fax : +61 2 9922 7466 E-mail : bowyera(a)logica.com WWW : http://www.logica.com.au/ ==================================

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Re: [Zope] Authenticating Users.
by Dieter Maurer 26 Nov '00

26 Nov '00

Jason C. Leach writes: > How can I authenticate a user from a form. Pretty much exactly how > zope.org logges you in? > > I have looked at both zope.org's login and logged_in (the action for > login) and don't see where it actually goes and checks the > username/password? This check is performed in "UserFolder.validate" called from "ZPublisher.BaseRequest.traverse". Apparently, zope.org supports cookie based authentication. This means, it does not use the standard Zope UserFolder but another one supporting this type of authentication. Dieter

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ZClass within ZClass
by Daryl Stultz 26 Nov '00

26 Nov '00

Hi folks, I am yet another Zope newbie. I am trying to create a ZClass hierarchy. Let's say I have a CDLibrary. Every CDLibrary has a CDManager (just one) and the CDManger holds all the CDEntry items. (The CDLibrary may have parts other than the CDManager, like a label maker or something- but that's not important now...) My question is this: How do I set up such a product with ZClasses within ZClasses. I have the HOW-TO collection, the ZBook, the Zope Book and the Guides. I've tried the HOW-TO on ZClasses and ObjectManagers, and Adding ZClass Instances Programmatically with no success. I am an experienced Python programmer with strong object-oriented knowledge and good HTML. Any help will be greatly appreciated. Thanks. -- "I ain't no stewin' rabbit, I'm a fricassein' rabbit. Have you got a fricassein' rabbit license?" Daryl Stultz - python, blender, robots, really bad harmonica playing... daryl(a)together.net RedHat Linux 6.1 - Dual Pentium Pro

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Re: [Zope] Python and EJB (J2EE)
by Hung Jung Lu 26 Nov '00

26 Nov '00

>From: Ender <kthangavelu(a)earthlink.net> >... Thanks for the comments. I'll reply other points in a few more days. >as for distributed technologies, while xml-rpc is useful and simple its >not useful (IMO) for enterprise programming, its too basic. This maybe true. However, HTML is also basic and simple, but exactly because of its simplicity, it became widely accepted and used. On the opposite end is CORBA: because it's so complicated, there is no vendor out there that can possibly implement all its features. Trading powerful features for a wider acceptance at times does work. SOAP is showing symptoms of becoming complicated. And that's a bad sign. See Fredrik Lundh's implementation comment for Python SOAP at http://www.pythonware.com/products/soap/profile.htm >Profile >Posted Jun 08, 2000 > >SOAP 1.1 is a highly modular and rather complicated standard. Supporting >every little nook and cranny is huge task, and since the specification is >still a moving target, we've decided to do this implementation step by >step. OK. Even the guru describes SOAP as "rather complicated", what then for the novices? I personally went through the SOAP protocol spec today and I had to agree it's "rather complicated". SOAP is going down the path of CORBA all over again. It's becoming COAP (Complicated Object Access Protocol). If not because Microsoft is behind it, I'd dump SOAP right away. Due to its simplicity, I'd say XML-RPC is here to stay, SOAP or no SOAP. It's unfortunate that the twin brothers have to fare good-bye, but at the same time I am glad that XML-RPC split off to remain simple. Future servers will have to handle both: more work, but that's fate. More on the other points later. regards, Hung Jung _____________________________________________________________________________________ Get more from the Web. FREE MSN Explorer download : http://explorer.msn.com

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Re: [Zope-dev] SQL-Methods Through-the-FileSystem
by seb bacon 26 Nov '00

26 Nov '00

Hi Johan, > Does anybody have a good suggestion how to > develope SQL Method ftfs (through the filesystem) > rather than ttw. > > Perferably in someway similare to the HTMLFile way try something like this: from Products.ZSQLMethods.SQL import SQL import PoPy def manage_add_user(self,email,password): conn = 'PoPy_database_connection' self.sql_add_user=SQL('sql_add_user', '', conn, 'email password', _sql_add_user) _sql_add_user = """ insert into tbl_users(email,password) values ( <dtml-sqlvar email type=string>, <dtml-sqlvar password type=string> ) """ hth, seb

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Special behavior or bug?
by Dany Rioux 26 Nov '00

26 Nov '00

Hi, yeah, I know, it's me again :) I've got this snippet in the standard_html_header hoping it would display the title of the calling document but instead displays the index_html's title... Is this the normal behavior? I know yesterday it was working... I tried refreshing the page but it's a no go. It simply refuses to put the correct title. It doesn't even put the header's file title... (something I guessed it would do the first time I tried it) Any opinion on that? ---<PASTE>--- <tr> <td align="right"><H2><dtml-var title></H2></td> </tr> ---</PASTE>--- ---.oo0O--------------O0oo.-------- Dany Rioux UnderSoft Inc. Business www.dating-reviews.com rdany(a)dating-reviews.com Personal www.drioux.com rdany(a)drioux.com -------.o00O-------O00o.-----------

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