Re: [Zope-dev] Announce: ZScheduler alpha Version 0.0.7
The problem noted below with the Trigger tab occurs only when Zope is limited to a single thread. The problem is due to contention for the single thread. The workaround is to avoid using the Trigger tab on single threaded Zope's. Or change ZEvent.py like this: def manage_triggerZEvent(self, client=None, REQUEST=None, RESPONSE=None, **kw): """For use by the Trigger tab on ZEvent management page. Use for testing the ZEvent in a context that mimics that of Dispatcher. """ aurl=REQUEST['URL1'] furl=string.join((aurl, 'trigger'), '/') RESPONSE.redirect(furl) With this fix, the product is fully functional, as far as I know, tho it remains an alpha product simply because it hasn't received a thorough shakedown. I'll have a new release out soon with this fix and other changes. -- Loren > ZScheduler Version 0.0.7 Date: 2000/07/02 > > 1. Fixed a bug that caused ZEvents to execute in the wrong context. > > 2. If the action method of a ZEvent raises an error, a traceback is written > in the log. > > 3. Added a Trigger tab to the management screen for ZEvents which fires the > event in the same context that the Dispatcher does, but without regard to > the schedule. This helps immensely in debugging the DTML in the ZEvent. > > I've tested on: >Win98 Zope 2.2.0b3 >Solaris 2.6 Zope 2.1.4 >Linux ?.? Zope 2.1.3 > > On the Linux configuration (my account at CodeIt Computing), most features > work; however, the new Trigger tab does not behave correctly. Though the > ZEvent method eventually executes correctly, it doesn't return anything to > the client and Zope seems to lock up temporarily -- that is, it doesn't > respond to other client requests. I don't have a Linux development system > with which to track this down. Any help would be appreciated. > [...snip...] > > Otherwise, ZScheduler is looking good. Let me know how it works for you. > > http://www.zope.org/Members/lstaffor/ZScheduler > > -- Thanks > -- Loren > ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
[Zope-dev] PROPOSAL: Splitting ZPatterns into two products
Many people have suggested splitting out the PlugIns part of ZPatterns as a seperate product for general Zope use. In addition to this, it is becoming clearer to me as I work on docs, etc., that there really is only one thing left in ZPatterns after you take out PlugIns, and that is DataSkins. (Pretty much everything else in ZPatterns only has meaning in relation to DataSkins.) So, I am thinking perhaps I should split ZPatterns into two products: PlugIns and DataSkins. The DataSkins product would require the PlugIns product. LoginManager would require both. For backward compatibility, there would need to be a "final release" of ZPatterns which contained stubs to load in classes from their new locations, so that existing objects stored in ZODB's would not be "broken". Newly created objects, of course, would refer to the new products automatically. The term "ZPatterns" would then go away, which is just as well because it doesn't really mean anything, anyway. :) Please let me know if you have any comments or questions on this. _ _/__) ___/ ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
Re: [Zope-dev] Re: [Zope-PTK] ZPatterns Documentation
At 10:58 PM 7/27/00 +0100, Steve Alexander wrote: >"Phillip J. Eby" wrote: >> >> Just comment, please, preferably in e-mail via Zope-dev. >> Thanks. > >Generally very clear and helpful. Tomorrow, I'll try it out on someone >who hasn't been looking at ZPatterns a great deal, and see what she gets >from it. Thanks. >A few suggestions. I feel sad that these seem to come across as >criticisms. Really, I'm very glad that you've found some time to work on >more accessible documentation. > Hm. Well, your comments have convinced me that 1) I'm not really qualified to write good beginner docs, and 2) I shouldn't try to combine a design document with beginner documentation in any event. :) Probably the doc needs to be split into seperately focused documents for "What are DataSkins (for)?" and "How do they work?". I was trying to capture all the things that happen in the interactions between DataSkins and their primary collaborators in order to have that documentation later. Unfortunately, a lot of that "how" detail is extraneous to the "how do I" and "why" questions. Probably as written, the doc is more useful as an introduction to ZPatterns innards than it is as an intro to ZPatterns itself. ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
[Zope-dev] ZPatterns 0.4.1snap
"Phillip J. Eby" wrote: > > At 08:06 PM 7/27/00 +0400, Jephte CLAIN wrote: > >By the way, besides new features like skinscript and proxy settings, did > >you fix any bugs from 0.4.0a5 in 0.4.1a5 that would make me have to > >upgrade my current ZPatterns? > > > > IIRC, nothing that would affect you on 2.1.6. I vaguely recall some fixes > for 2.2 stuff, but I think they were all out in 0.4.0a5 anyway. Just a note: I sent an email earlier to Phillip about this, but it may be a good isea to get it out here too. I used a fresh install of zope, and the new ZPatterns snap for testing. The latest LM (0.8.7a1) does not seem compatible. It errors out complaining about not being able to import stuff, Like Rack (IIRC), and one other. -- Do not meddle in the affairs of sysadmins, for they are easy to annoy, and have the root password. ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
[Zope-dev] Re: [Zope-PTK] ZPatterns Documentation
"Phillip J. Eby" wrote: > > Just comment, please, preferably in e-mail via Zope-dev. > Thanks. Generally very clear and helpful. Tomorrow, I'll try it out on someone who hasn't been looking at ZPatterns a great deal, and see what she gets from it. A few suggestions. I feel sad that these seem to come across as criticisms. Really, I'm very glad that you've found some time to work on more accessible documentation. You don't seem to say anything like "You make your own domain-specific classes derive from DataSkin. These can be ZClasses or Python classes". This may be obvious, but I think it is an important part of how data skins are intended to be used. """A data manager helps data skins by: Providing them access to their Data Plug-ins, including propagating transaction events and DataManagementEvents to the Data Plug-ins""" Still very jagon-filled. That's ok, if it is accompanied by some real-world explanation. Perhaps add something like "You can use Data plug-ins for indexing Dataskins in a catalog, or in many catalogs, or [another different familiar example]". """Keeping track of their canonical or "normalized" forms for acquisition management""" You almost lost me there :-) """Or, if a data skin is retrieved from any other Zope object, its __of__ method will try to find a Customizer or "Folder With Customization Support" in the acquisition path, then ask it for a data manager to bind with. Once this is done, the skin remains bound to that manager until the next such occurrence.""" Pretty clear, except the end -- next what occurrence? The next time the data skin is retrieved from a Zope object? So, every time a dataskin is retrieved from a zope object (that isn't a Rack), it uses acquisition to look for a customizer. -- Steve Alexander Software Engineer Cat-Box limited http://www.cat-box.net ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
[Zope-dev] ZPatterns Documentation
Despite the implications of the bait-and-switch subject line, I have not yet written any substantial amounts of documentation. I have, however, written this: http://www.zope.org/Members/pje/Wikis/ZPatterns/DataSkinsOverview DataSkins (formerly known as RackMountables) are central to the operation of ZPatterns, and I decided to take a whack at explaining them at an introductory (I hope) level, complete with a diagram. Could anyone who gets a chance please give me some feedback? I'd like to know if this is the kind of stuff that people would like to see more of, or whether it's too much detail, not enough, right questions, wrong questions... Just comment, please, preferably in e-mail via Zope-dev. Thanks. _ _/__) ___/ ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
[Zope-dev] Interaction between new (2.2) ZCatalog and Renderable
Hi Zdevs, I posted a message to [EMAIL PROTECTED] and then later figured out the problem and now feel that the issue belongs in Zope-Dev, so here it goes. Submitted for your approval... I think that I have found an interaction between changes made in manage_addZCatalog (lib/python/Products/ZCatalog/ZCatalog/py) and the Renderable ZClass product. It's also possible that this interaction will affect other things as well. The new version of method 'manage_addZCatalog' has calls to str() near its beginning. The older (2.1.6) does not. The Renderable product overrides str to do its work. This gets _very_ messy when you initialize a catalog in the xxx_add dtml method for a ZClass (that is, if you create an instance of the ZClass and the _add method instantiates a ZCatalog instance.) and the ZClass itself is renderable. The manage_addZCatalog method ends up invoking the str() method that's in the Renderable product. This code attempts to publish(?) the a dtml method named render (this is what it does by default). In my case, the dtml method tries to query the created ZCatalog instance. This does not work! since the ZC instance isn't actually created since the _add method has not completed(?). So the render dtml method borks with an attribute error. Correct me if I have reverse-engineered these conclusions from looking at the traceback and made a logic error As one can see from the traceback attached to the end of this email, the manage_add methof (I put X near where this mess begins) warps into the render dtml method at line 112 of manage_addZCatalog, which is the first str() (can be seen in the src). This ends up in an External Method, rendercal.py (last line of traceback). If you were to look there you'd se that it's doing a Catalog.searchResults(). **SO** it appears as if you cannot instantiate a ZCatalog in the _add dtml method of a ZClass IFF the ZClass inherits from Renderable AND if the render dtml method of the class (required by Renderable) uses the ZCatalog. This interaction may very well affect other products as well. But right now my brain hurts. Excuse me if someone else reported this, but I haven't seen mention of it so far. This should be easy to reproduce. On a 2.2 system that has the Renderable ZClass product installed, install EventFolder (it's on Zope.org, there's a .zexp and some External Methods in the tgz file, just untar it in the Zope root and copy the .zexp to the import dir and import it). Try to create an instance and you should get this error. It seems to me the only solution is to recreate the class without the Renderable inheritance. Not a big deal to lose But what other schizoZopia is waiting in the future. Jeff Sasmor [EMAIL PROTECTED] Traceback (innermost last): File /usr/local/Zope220/lib/python/ZPublisher/Publish.py, line 222, in publish_module File /usr/local/Zope220/lib/python/ZPublisher/Publish.py, line 187, in publish File /usr/local/Zope220/lib/python/Zope/__init__.py, line 221, in zpublisher_exception_hook (Object: RoleManager) File /usr/local/Zope220/lib/python/ZPublisher/Publish.py, line 171, in publish File /usr/local/Zope220/lib/python/ZPublisher/mapply.py, line 160, in mapply (Object: EventFolder_add) File /usr/local/Zope220/lib/python/ZPublisher/Publish.py, line 112, in call_object (Object: EventFolder_add) File /usr/local/Zope220/lib/python/OFS/DTMLMethod.py, line 167, in __call__ (Object: EventFolder_add) File /usr/local/Zope220/lib/python/DocumentTemplate/DT_String.py, line 502, in __call__ (Object: EventFolder_add) File /usr/local/Zope220/lib/python/DocumentTemplate/DT_Let.py, line 147, in render (Object: folder="EventFolder.createInObjectManager(REQUEST['id'], REQUEST)") File /usr/local/Zope220/lib/python/DocumentTemplate/DT_With.py, line 146, in render (Object: folder) File /usr/local/Zope220/lib/python/DocumentTemplate/DT_Util.py, line 337, in eval (Object: manage_addProduct['ZCatalog'].manage_addZCatalog(this(),'Catalog','EventCatalog' )) (Info: this) File , line 0, in ? it begins File /usr/local/Zope220/lib/python/Products/ZCatalog/ZCatalog.py, line 112, in manage_addZCatalog how did we get here File /usr/local/Zope220/lib/python/Products/Renderable/Renderable.py, line 17, in __str__ (Object: Renderable) File /usr/local/Zope220/lib/python/OFS/DTMLMethod.py, line 167, in __call__ (Object: render) File /usr/local/Zope220/lib/python/DocumentTemplate/DT_String.py, line 502, in __call__ (Object: render) File /usr/local/Zope220/lib/python/DocumentTemplate/DT_With.py, line 146, in render (Object: ZopeTime) File /usr/local/Zope220/lib/python/DocumentTemplate/DT_Let.py, line 147, in render (Object: tdate="'%s/%s/1' % (tyear,tmonth) " this_month="'%s/%s' % (tyear,tmonth) " ddate="_.DateTime(tdate)") File /usr/local/Zope220/lib/python/DocumentTemplate/DT_Let.py, line 14
Re: [Zope-dev] Re: zpatterns-0.4.0a5: problemwithunregistering transactionals
At 08:06 PM 7/27/00 +0400, Jephte CLAIN wrote: >By the way, besides new features like skinscript and proxy settings, did >you fix any bugs from 0.4.0a5 in 0.4.1a5 that would make me have to >upgrade my current ZPatterns? > IIRC, nothing that would affect you on 2.1.6. I vaguely recall some fixes for 2.2 stuff, but I think they were all out in 0.4.0a5 anyway. ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
Re: [Zope-dev] Re: [Zope] Bi-directional update of Data.fs
Chris Withers wrote: > > Steve Alexander wrote: > > Don't see why not. When an object is changed, the new object is just > > appended to the end of Data.fs. Unless you use undo, or you pack the > > Data.fs. > > You missed the problem ;-) > > Technically, there is no problem... > > Logically, what happens if one user updates and object on one machien > and another user on another machines, after which you merge the > data.fs's? That's what the 'your version is canonical' qualifier handles :-) -- Do not meddle in the affairs of sysadmins, for they are easy to annoy, and have the root password. ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
Re: [Zope-dev] Re: zpatterns-0.4.0a5: problemwithunregistering transactionals
> Okay, that makes sense. 2.1.6 has a weirdness in the ZPublisher exception > hook that begins a new transaction instead of aborting the old one cleanly, I did notice this. > and that ultimately causes the objects to get aborted twice. I reported > this a month or two ago and it got fixed in 2.2. rahhh, is Zope 2.2 the only way to go? :-) > You're going to have to > go with your patch, though, because there's not a simple patch you can > apply to 2.1.6 to fix the problem in Zope itself. Unfortunately, it is > hard for me to tell whether your patch has any other repercussions. :( I > will try to review the structure of my Transactional class and see if there > are any side effects (besides the one you've found) of an object being > aborted twice. Thanks a lot. By the way, besides new features like skinscript and proxy settings, did you fix any bugs from 0.4.0a5 in 0.4.1a5 that would make me have to upgrade my current ZPatterns? regards, [EMAIL PROTECTED] ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
Re: [Zope-dev] Re: zpatterns-0.4.0a5: problem withunregistering transactionals
At 07:12 PM 7/27/00 +0400, Jephte CLAIN wrote: >"Phillip J. Eby" a écrit : >> >> Question... Are you on 2.1.x or 2.2? >I'm still on 2.1.6. I cannot afford a migration of my product now since >it is still in developpement and my customer wants it to work as soon as >possible. Okay, that makes sense. 2.1.6 has a weirdness in the ZPublisher exception hook that begins a new transaction instead of aborting the old one cleanly, and that ultimately causes the objects to get aborted twice. I reported this a month or two ago and it got fixed in 2.2. You're going to have to go with your patch, though, because there's not a simple patch you can apply to 2.1.6 to fix the problem in Zope itself. Unfortunately, it is hard for me to tell whether your patch has any other repercussions. :( I will try to review the structure of my Transactional class and see if there are any side effects (besides the one you've found) of an object being aborted twice. >> Also, in your example, tpc_entered >> is not set because tpc_entered is only true if the transaction commit >> process (tpc = two-phase commit) has been started. >I thought that tpc_entered would go back to 0 when the transaction is >over. It is clear that I don't know how the transaction machinery really >works. It's probably because of the double-abort weirdness. :( ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
Re: [Zope-dev] Quickie on ZPatterns ... I promise :)
At 09:15 AM 7/27/00 +0100, Steve Alexander wrote: >Bill Anderson wrote: >> >> Let's say I have an object I will store in a rack. Let us say I want this object to be >> cataloged in a ZCatalog. Any caveats I need to know about >> ..such as "Don't do that!" ? >> ?;^)= > >Make one of the object's base-classes DataSkin. > >Don't make it CatalogAware. > >Use triggers to index and unindex the object from a catalog. You'll >probably want to store the catalog in Specialist. > >By the way, Phillip Eby has released a new development snapshot: > > >http://www.zope.org/Members/pje/ZPatterns/ZPatterns-0-4-1snap1.tgz/view > >I'll be trying it later today. > FYI, the snapshot really only adds proxy roles support for generic providers/triggers, and adds a first-cut version of SkinScript. If you're adventurous, you can look at SkinScript/Compiler.py and have a look at the grammar in order to figure out what the language does. So far I've successfully tested a SkinScript method that does the work of four GenericAttributeProviders and two GenericTriggers, just by using the appropriate statements. Here's a SkinScript snippet you might use for CatalogAwareness: WHEN OBJECT ADDED CALL somecatalog.catalog_object(self) WHEN OBJECT CHANGED CALL somecatalog.recatalog_object(self) WHEN OBJECT DELETED CALL somecatalog.uncatalog_object(self) (Replace the incorrect catalog API calls with ones that are correct... I'm sure I'm missing some parameters and probably getting the names wrong...) Note that "somecatalog" must be in the acquisition context of the SkinScript method itself. If you want to use a catalog in the context of the DataSkin, you need to say "self.somecatalog...". Some other SkinScript snippets: # Store attribs persistently - replaces # Persistent Internal Attribute Provider STORE attrib1,attrib2 IN SELF # Computed attributes WITH SELF COMPUTE attrib1=attrib2+attrib3, attrib4=attrib6*10 # Generic attrib provider WITH (SomeSQLMethod(key=self.id) or [NOT_FOUND])[0] COMPUTE field1, field2, somefield=field3+field4, fancy_id = '*(%s%s)%' % (otherfield,self.id) # Generic trigger WHEN OBJECT ADDED,CHANGED,DELETED CALL someexpr(self.id) SAVING foo,bar, baz=spam, widget=diddly+id # Attribute provider STORE attr1,attr2 USING somefunc(self) SAVING attr1,attr2 # Conditional attrib provider WHEN OBJECT ADDED STORE attr2 USING otherfunc(self) That about covers it for what's implemented so far. The goal is to ultimately replace the majority of providers and triggers with SkinScript. But it will still be possible to write and use custom plug-ins that provide attributes or handle events in other ways. But SkinScript will be quite handy for most things. ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
Re: [Zope-dev] Re: zpatterns-0.4.0a5: problem withunregistering transactionals
"Phillip J. Eby" a écrit : > > Question... Are you on 2.1.x or 2.2? I'm still on 2.1.6. I cannot afford a migration of my product now since it is still in developpement and my customer wants it to work as soon as possible. > Also, in your example, tpc_entered > is not set because tpc_entered is only true if the transaction commit > process (tpc = two-phase commit) has been started. I thought that tpc_entered would go back to 0 when the transaction is over. It is clear that I don't know how the transaction machinery really works. regards, [EMAIL PROTECTED] ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
Re: [Zope-dev] Re: zpatterns-0.4.0a5: problem with unregistering transactionals
Question... Are you on 2.1.x or 2.2? Also, in your example, tpc_entered is not set because tpc_entered is only true if the transaction commit process (tpc = two-phase commit) has been started. At 11:53 AM 7/27/00 +0400, Jephte CLAIN wrote: > >Ok, so ZPatterns.Transactional._unregistered method is called twice for >a ZPatterns.Transactional object when an exception is raised and the >ZPatterns.Transactional object has not be freed: once from the >ZODB.Transaction.abort method, once from the ZODB.Transaction.__del__ >method which call abort if objects to be aborted remain in the zodb >transaction aware object >The call is made twice for DataSkins and for TransientMapping (as far as >I know, they are at the moment the only Transactional objects in >zpatterns) > >for example, try this DTML code in a specialist: > > > > > > >without my patch, Zope should display 'uncatched exceptions in >Transation object' > >so what now? I'm lost. Is this normal or not? Is my patch sufficient >(ignore attempts to abort the object twice by trapping exceptions in >_unregister). What about Transactional.abort which check for >tpc_entered? Why is tpc_entered never set to 0? > ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
[Zope-dev] Visual studio compilation ....
I'm trying to tweak Splitter.c in order handle french specific characters. It seems to work fine with gcc under Linux but it doesn't work with MS Visual C. Even compiling the original source code under windows results in a different module behaviour. Which compiler is required to compile Splitter.c under Windows ? If any, could you send me the project file ? ___ Vendez tout... aux enchères - http://www.caraplazza.com
[Zope-dev] [Zope] App isolation
Not sure if this list is the best place to put such question but here it is... I need to develop what would be a product if only Zope was the target. As it´s not I was thinking what could I do to not need to build such app twice: I came to 2 options both involving building a server of some kind and using Python to connect to this server. 1st Build the app as a COM server (the target OS is Windows) and using Python support build an interface to this COM server as a Zope product 2nd Build the app as a XMLRPC server and using Python support build an interface to this XMLRPC server The second options is better because I´m not attached to any platform but, as I said, that´s not an issue right now. Good options would be having a JVM running "inside" Zope so that jave objects could be accessed by it or SOAP Zope support beeing ready... Any sugestions on any of those or a 3rd option ? Thanks in advance, Jacques ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
Re: [Zope-dev] Bi-directional update of Data.fs
Chris Withers wrote: > > > Use Jim's new conflict resolution > > algorithm to try to settle conflicts. > > Urm? First I heard of this and it sounds like just the right sort of > thing... > > Where can I find out more? http://www.zope.org/Members/jim/ZODB/ApplicationLevelConflictResolution See also: http://www.zope.org/Members/jim/ZODB/ReverseDiffVersioning -- Steve Alexander Software Engineer Cat-Box limited http://www.cat-box.net ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
Re: [Zope-dev] Bi-directional update of Data.fs
Steve Alexander wrote: > What does Lotus Notes offer to do if you get such a conflict? Save both versions and ask the user to delete the one which isn't needed, or merge the changes... > Use Jim's new conflict resolution > algorithm to try to settle conflicts. Urm? First I heard of this and it sounds like just the right sort of thing... Where can I find out more? > If a conflict can't be settled, > ask interactively, or apply some sort of policy (like "chris always > wins" for example) and log the lost changes. Heh... I like the sound of that ;-) cheers, Chris ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
Re: [Zope-dev] ZMySQLDA - errors during compilation...
This is a confirmation, I did the same stuff to get the module to compile :-) - Holger Am Don, 27 Jul 2000 schrieb Phil Harris: > Jon, > > If I remember correctly all you have to do is remove the & from the lines in > question. > > So on line 384 of MySQLModule.c find the & and remove it, just the &. --snipp-- -- --- catWorkX GmbH Hamburg Dipl.-Ing. Holger Lehmann Stresemannstr. 364 22761 Hamburg Tel: +49 40 890 646-0 Fax: +49 40 890 646-66 mailto:[EMAIL PROTECTED] http://www.catworkx.de http://www.catbridge.de ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
Re: [Zope-dev] Re: [Zope] Bi-directional update of Data.fs
Steve Alexander wrote: > Don't see why not. When an object is changed, the new object is just > appended to the end of Data.fs. Unless you use undo, or you pack the > Data.fs. You missed the problem ;-) Technically, there is no problem... Logically, what happens if one user updates and object on one machien and another user on another machines, after which you merge the data.fs's? I'm thinkthing of the things which result in Notes Replication/Save conflicts... cheers, Chris ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
Re: [Zope-dev] Re: [Zope] Bi-directional update of Data.fs
Chris Withers wrote: > > Steve Alexander wrote: > > Don't see why not. When an object is changed, the new object is just > > appended to the end of Data.fs. Unless you use undo, or you pack the > > Data.fs. > > You missed the problem ;-) > > Technically, there is no problem... > > Logically, what happens if one user updates and object on one machien > and another user on another machines, after which you merge the > data.fs's? > > I'm thinkthing of the things which result in Notes Replication/Save > conflicts... What does Lotus Notes offer to do if you get such a conflict? I'm probably talking rubbish in what follows, because I don't have much of an idea how these things really work... The server has a data.original. You take a copy of this, called data.chris. You use this for a while, and data gets appended to data.chris. Someone else is using the server, and data.original gets appended to. Later, you want to recombine the changes, so you do as follows: Create a data.original.before_fork that is the data.original just before you took the copy data.chris. (You can work this out by looking at the modified data.original and data.chris). Create a list of the combined transactions (in order of time, I guess) that happened on the server, and to data.chris. Within one monsterous transaction, apply the list of combined transactions using the usual under-the-hood ZODB machinery. Use Jim's new conflict resolution algorithm to try to settle conflicts. If a conflict can't be settled, ask interactively, or apply some sort of policy (like "chris always wins" for example) and log the lost changes. -- Steve Alexander Software Engineer Cat-Box limited http://www.cat-box.net ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
Re: [Zope-dev] Re: [Zope] Bi-directional update of Data.fs
chrisw wrote: > > Bill Anderson wrote: > > Since the Data.fs is appended to, and that your disconnected version is > > canonical, why couldn't you basically look for the last common > > transaction, and append all transactions in the canonocial to the main > > one? > > Hwo would that handle the situation where an object has been modified in > data.fs? > Not too well I'd guess... :( Don't see why not. When an object is changed, the new object is just appended to the end of Data.fs. Unless you use undo, or you pack the Data.fs. -- Steve Alexander Software Engineer Cat-Box limited http://www.cat-box.net ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
[Zope-dev] Re: [Zope] Bi-directional update of Data.fs
Bill Anderson wrote: > Since the Data.fs is appended to, and that your disconnected version is > canonical, why couldn't you basically look for the last common > transaction, and append all transactions in the canonocial to the main > one? Hwo would that handle the situation where an object has been modified in data.fs? Not too well I'd guess... :( > (thinking this might need to be moved to dev ...) And so it was ;-) cheers, Chris ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
Re: [Zope-dev] Quickie on ZPatterns ... I promise :)
Itamar Shtull-Trauring wrote: > > Bill Anderson wrote: > > > > Let's say I have an object I will store in a rack. Let us say I want this object >to be > > cataloged in a ZCatalog. Any caveats I need to know about > > ..such as "Don't do that!" ? > > ?;^)= > > You can't have them inherit from CatalogAware, you'll need to use a trigger > that does this for you. I'm uploading a Product that gives this capability > - and unlike CatalogAware, it recatalogs *automatically* whenever the object > changes. No more object_reindex! (I only tested extensively with DataSkins, > though). > > http://www.zope.org/Members/itamar/ZPAddons Cool! I'll check it out today/tomorrow. Now if only I could figure out how to change user.__roles in Membership, I'd have a really cool Memebrship Release ready :-) -- Do not meddle in the affairs of sysadmins, for they are easy to annoy, and have the root password. ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
[Zope-dev] SQL and customise screen
Hi, I would like to use an SQL request to search some data in an access database. The request need to be executed when somebody clic on a button (onclick="") The result need to be displayed on the screen, but not on one line. I must be able to place the results in different places on the document. If somebody has any idea. Vincent - Thanks PS : At least, I must be able to customise the array display with the search zope wizard ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
Re: [Zope-dev] Quickie on ZPatterns ... I promise :)
Steve Alexander wrote: > > Bill Anderson wrote: > > > > Let's say I have an object I will store in a rack. Let us say I want this object >to be > > cataloged in a ZCatalog. Any caveats I need to know about > > ..such as "Don't do that!" ? > > ?;^)= > > Make one of the object's base-classes DataSkin. > > Don't make it CatalogAware. that was my hunch ... > > Use triggers to index and unindex the object from a catalog. You'll > probably want to store the catalog in Specialist. OK, guess it's sime to learn triggers ;-) > > By the way, Phillip Eby has released a new development snapshot: > > > http://www.zope.org/Members/pje/ZPatterns/ZPatterns-0-4-1snap1.tgz/view > > I'll be trying it later today. Likewise. Gotta see how/if it works with membership. > > -- > Steve Alexander > Software Engineer > Cat-Box limited > http://www.cat-box.net -- Do not meddle in the affairs of sysadmins, for they are easy to annoy, and have the root password. ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
Re: [Zope-dev] Quickie on ZPatterns ... I promise :)
Bill Anderson wrote: > > Let's say I have an object I will store in a rack. Let us say I want this object to >be > cataloged in a ZCatalog. Any caveats I need to know about > ..such as "Don't do that!" ? > ?;^)= Make one of the object's base-classes DataSkin. Don't make it CatalogAware. Use triggers to index and unindex the object from a catalog. You'll probably want to store the catalog in Specialist. By the way, Phillip Eby has released a new development snapshot: http://www.zope.org/Members/pje/ZPatterns/ZPatterns-0-4-1snap1.tgz/view I'll be trying it later today. -- Steve Alexander Software Engineer Cat-Box limited http://www.cat-box.net ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
Re: [Zope-dev] ZMySQLDA - errors during compilation...
Jon, If I remember correctly all you have to do is remove the & from the lines in question. So on line 384 of MySQLModule.c find the & and remove it, just the &. Then repeat for any line with the same error and hey presto, Bob is now married to your mothers sister. hth Phil [EMAIL PROTECTED] - Original Message - From: "Jon Franz" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Cc: <[EMAIL PROTECTED]> Sent: Wednesday, July 26, 2000 8:44 PM Subject: [Zope-dev] ZMySQLDA - errors during compilation... > Hello, > I'm trying to install ZMySQLDA onto a Linux machine with > Zope 2.2.0, python 1.5.2, and a newly installed (from source) > copy of MySQL 3.22.23 (latest stable). I had to modify the > include paths in Setup.in so it could find the include files, > but now I get the following errors when running make: > > >>> > gcc -fpic -I/usr/local/mysql/include/mysql -I/usr/include/mysql -g -O2 > -I/usr/local/include/python1.5 - > I/usr/local/include/python1.5 -DHAVE_CONFIG_H -c ./MySQLmodule.c > ./MySQLmodule.c: In function `pythonify_row': > ./MySQLmodule.c:238: warning: assignment from incompatible pointer type > ./MySQLmodule.c: In function `pythonify_res_fields': > ./MySQLmodule.c:384: invalid lvalue in unary `&' > ./MySQLmodule.c: In function `STH_fetchdict': > ./MySQLmodule.c:1125: invalid lvalue in unary `&' > ./MySQLmodule.c:1147: invalid lvalue in unary `&' > make: *** [MySQLmodule.o] Error 1 > <<< > > any suggestions? I've had errors installing ZMySQLDA before, > but nothing like this... > > Thanks in advance. > > ~ Jonathan M. Franz ~ Senior Developer/Technical Leader ~ > ~ SW-Dev Division, Springdale, Ohio Office ~ 513.618.2248 ~ > ~ OneNet Communications (A USNet/MDM Company) www.one.net ~ > > ___ > Zope-Dev maillist - [EMAIL PROTECTED] > http://lists.zope.org/mailman/listinfo/zope-dev > ** No cross posts or HTML encoding! ** > (Related lists - > http://lists.zope.org/mailman/listinfo/zope-announce > http://lists.zope.org/mailman/listinfo/zope ) ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
[Zope-dev] Re: zpatterns-0.4.0a5: problem with unregistering transactionals
Jephte CLAIN wrote: > I have a case where Transactional._unregister is called without > Transactional._register being called, raising an exception in > Transaction._unregister and then in > ZODB.Transaction.Transaction.__del__, causing Zope to dump core when it > is run as a daemon (because python notifies of the unhandled exception > by writin to stderr) > > I have not yet found why (and how?) an object is > Transactional._unregistered without being Transactional._registered > before. (I even did not know about the existence of these methods!) But > until I understand, this patch allow me to stay alive: Ok, so ZPatterns.Transactional._unregistered method is called twice for a ZPatterns.Transactional object when an exception is raised and the ZPatterns.Transactional object has not be freed: once from the ZODB.Transaction.abort method, once from the ZODB.Transaction.__del__ method which call abort if objects to be aborted remain in the zodb transaction aware object The call is made twice for DataSkins and for TransientMapping (as far as I know, they are at the moment the only Transactional objects in zpatterns) for example, try this DTML code in a specialist: without my patch, Zope should display 'uncatched exceptions in Transation object' so what now? I'm lost. Is this normal or not? Is my patch sufficient (ignore attempts to abort the object twice by trapping exceptions in _unregister). What about Transactional.abort which check for tpc_entered? Why is tpc_entered never set to 0? please help regards, [EMAIL PROTECTED] ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
Re: [Zope-dev] Quickie on ZPatterns ... I promise :)
Bill Anderson wrote: > > Let's say I have an object I will store in a rack. Let us say I want this object to >be > cataloged in a ZCatalog. Any caveats I need to know about > ..such as "Don't do that!" ? > ?;^)= You can't have them inherit from CatalogAware, you'll need to use a trigger that does this for you. I'm uploading a Product that gives this capability - and unlike CatalogAware, it recatalogs *automatically* whenever the object changes. No more object_reindex! (I only tested extensively with DataSkins, though). http://www.zope.org/Members/itamar/ZPAddons -- Itamar S.T. [EMAIL PROTECTED] Fingerprint = D365 7BE8 B81E 2B18 6534 025E D0E7 92DB E441 411C ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
[Zope-dev] Quickie on ZPatterns ... I promise :)
Let's say I have an object I will store in a rack. Let us say I want this object to be cataloged in a ZCatalog. Any caveats I need to know about ..such as "Don't do that!" ? ?;^)= Bill -- Do not meddle in the affairs of sysadmins, for they are easy to annoy, and have the root password. ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
