[Zope-dev] ZWikiZC comments
Two substantive comments, and some editorial ones. You write that you are thinking of different schemes for generating paths and ids. I suggest one of the things you consider is whether your scheme will work if someone cuts the ZWikiZC and pastes it somewhere else in the tree. I'm not sufficiently versed in the different methods you discussed to understand their implications--they seem to involve yet more undocumented interfaces in Zope. Second, I think the facility for email notification of changes is really interesting. It seems to me that a problem with the Wiki concept (for some uses) is that they are very difficult to monitor for changes. Sending email, perhaps combined with diff, could help with this. Editorial comments: "Summary" is spelled with an "a" (not summery). "Product" is spelled with a "c" (not produkt). Since these words are prominent in the documentation, and at least one (summary) is to be a critical method, it would be good to clean this up. The "!" in the paths baffled me (e.g., "!WikiPage"). Why Catalogs distinguish metadata from indices also eludes me. It should be explained in the Z/Catalog writeup, but since it's not, it was there to bother me while I read your description. It's hazardous to claim a performance advantage without benchmarks. ___ 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] inheritedAttribute
In the latest Zope source, I've noticed calls to inheritedAttribute in the Python code. I've found the C source code in ExtensionClass.c, but it doesn't help me understand when I should use it from Python, and why. *reads more source* Ah! About 70 lines further on in ExtensionClass.c: "inheritedAttribute(class,name) -- Get an inherited attribute\n\n" "Get an attribute that would be inherited if the given (extension)\n" "class did not define it. This method is used when overriding\n" "inherited methods. It provides 2 advantages over accessing\n" "\n" "attributes directly through a superclass:\n" "\n" "1. The superclass need not be known,\n" "\n" "2. The superclass may be a Python class. Without this method, it would\n" " be possible to override methods inherited from python classes because\n" " unbound methods gotten from Python classes cannot be called with \n" " extension class instances. \n" Is there some documentation of this on zope.org or dev.zope.org that I've missed? Thanks. -- 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] New version of BTreeFolder
Hi gang, This version just fixes a bug with the folder contents tab on Windows. For some reason, on Windows 95 (and perhaps other platforms) the Python interpreter behaves differently enough that if you use a class attribute from a different module and put it in your own class, you may in fact be modifying its global context. It's probably a bug in Python. As a workaround, this version of BTreeFolders doesn't have the "details" tab anymore. http://www.zope.org/Members/hathawsh/BTreeFolder/BTreeFolder-0.1.1.tar.gz BTW has anyone done any semi-formal speed tests? It's rumored that a custom getattr in Python can cause a bit of a slowdown. We could write a custom getattr in C to solve the problem. But we don't want to do any premature optimization. Shane ___ 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] Transaction question
I just want to check if things work the way I think (hope) it does. In a transaction, are objects attributes safe from other threads. self._v_mytemp in my request does not conflict with other requests? (I suppose the have to be otherwise REQUEST's would interfere with each other.) I know that _v_* attributes aren't persistent but do they remain active in memory and there by accessible to other requests after the transaction commit? (I suppose class attributes needs to be protected to be thread-safe? Does anybody have an example how to do that?) Regards, Johan ___ 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] New version of BTreeFolder. Just a Newbie Question
Oh, well, I'd bet this is a silly question. But I can not resist nor find answer by myself. Q: Why don't you BTree-fy all the subclasses of ObjectManager? Is there a reason that anyone but can a newbie see? LEE Kwan Soo. ps. I only hope to be able to make clear statement in English, but i am already too sleepy now. sorry. - Original Message - From: "Shane Hathaway" [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Monday, August 28, 2000 10:26 PM Subject: [Zope-dev] New version of BTreeFolder Hi gang, This version just fixes a bug with the folder contents tab on Windows. For some reason, on Windows 95 (and perhaps other platforms) the Python interpreter behaves differently enough that if you use a class attribute from a different module and put it in your own class, you may in fact be modifying its global context. It's probably a bug in Python. As a workaround, this version of BTreeFolders doesn't have the "details" tab anymore. http://www.zope.org/Members/hathawsh/BTreeFolder/BTreeFolder-0.1.1.tar.gz BTW has anyone done any semi-formal speed tests? It's rumored that a custom getattr in Python can cause a bit of a slowdown. We could write a custom getattr in C to solve the problem. But we don't want to do any premature optimization. Shane ___ 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 )
Re: [Zope-dev] New version of BTreeFolder. Just a Newbie Question
LEE Kwan Soo wrote: Oh, well, I'd bet this is a silly question. But I can not resist nor find answer by myself. Q: Why don't you BTree-fy all the subclasses of ObjectManager? Is there a reason that anyone but can a newbie see? Obviously what BTreeFolder does should be available in standard folders. That is a long-term goal for Zope. BTreeFolder only exists to scope out the need for big folders as well as provide the capability in the short term. Shane ___ 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] New version of BTreeFolder
Shane Hathaway wrote: Hi gang, This version just fixes a bug with the folder contents tab on Windows. For some reason, on Windows 95 (and perhaps other platforms) the Python interpreter behaves differently enough that if you use a class attribute from a different module and put it in your own class, you may in fact be modifying its global context. It's probably a bug in Python. As a workaround, this version of BTreeFolders doesn't have the "details" tab anymore. http://www.zope.org/Members/hathawsh/BTreeFolder/BTreeFolder-0.1.1.tar.gz BTW has anyone done any semi-formal speed tests? It's rumored that a custom getattr in Python can cause a bit of a slowdown. We could write a custom getattr in C to solve the problem. But we don't want to do any premature optimization. Shane I'll work on some tests. Kapil ___ 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] Transaction question
Using a mutex by way of example, without using anything Zope-specific (the following uses the Python threading module): import threading lock = threading.Lock() myglobal = [] def changeglobal(val): lock.acquire() try: myglobal.append(val) finally: lock.release() (I suppose class attributes needs to be protected to be thread-safe? Does anybody have an example how to do that?) You can use allocate_lock() to accomplish thread safety with class attributes. ___ 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] Transaction question
[Shane Hathaway] | Johan Carlsson wrote: | | I just want to check if things work the way I think (hope) it does. | | In a transaction, are objects attributes safe from other threads. | | self._v_mytemp in my request does not conflict with other requests? | | This is correct (or it's supposed to be.) What do you mean by "supposed to be"? Is it, or is it not correct? ___ 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] Transaction question
Erik Enge wrote: [Shane Hathaway] | Johan Carlsson wrote: | | I just want to check if things work the way I think (hope) it does. | | In a transaction, are objects attributes safe from other threads. | | self._v_mytemp in my request does not conflict with other requests? | | This is correct (or it's supposed to be.) What do you mean by "supposed to be"? Is it, or is it not correct? It means that a correctly operating ZODB will behave this way. I suspected that Johan may have been facing some kind of ZODB bug, therefore I qualified my statement. The phrasing was designed to elicit a response if he were indeed facing a defect. Shane ___ 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] Transaction question
| | I just want to check if things work the way I think (hope) it does. | | In a transaction, are objects attributes safe from other threads. | | self._v_mytemp in my request does not conflict with other requests? | | This is correct (or it's supposed to be.) What do you mean by "supposed to be"? Is it, or is it not correct? It means that a correctly operating ZODB will behave this way. I suspected that Johan may have been facing some kind of ZODB bug, therefore I qualified my statement. The phrasing was designed to elicit a response if he were indeed facing a defect. I haven't experienced any problems so far, but I havn't tested it yet either. The reason I asked was to not make any stupied assumptions before starting coding. If I experience any problems I'll let you know, naturally :-) Cheers, JOhan ___ 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] Transaction question
[Shane Hathaway] | It means that a correctly operating ZODB will behave this way. Oh, I see. Thanks for clarifying that. :) ___ 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] New version of BTreeFolder. Just a Newbie Question
Shane Hathaway wrote: LEE Kwan Soo wrote: Oh, well, I'd bet this is a silly question. But I can not resist nor find answer by myself. Q: Why don't you BTree-fy all the subclasses of ObjectManager? Is there a reason that anyone but can a newbie see? Obviously what BTreeFolder does should be available in standard folders. That is a long-term goal for Zope. BTreeFolder only exists to scope out the need for big folders as well as provide the capability in the short term. Any chance at a BTree Folder w/customizer suppor tin the near future? :) -- 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] New version of BTreeFolder. Just a Newbie Question
Bill Anderson wrote: Any chance at a BTree Folder w/customizer support in the near future? :) It should be quite easy to do. I vaguely recall Steve A or Steve S might have done it. Shane ___ 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] New version of BTreeFolder. Just a Newbie Question
Bill Anderson wrote: Any chance at a BTree Folder w/customizer suppor tin the near future? :) I did some work towards this. However, I didn't continue. I realised that I could get the same effect by having a BTreeFolder inside a Customizer Folder. The only downside is a slightly longer URL for objects in the BTreeFolder. -- 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] ZPatterns bug with patch
"Phillip J. Eby" wrote:
At 10:22 AM 8/27/00 +0100, Steve Alexander wrote:
I've fixed this by adding a test to the start of __set_attr__ of
DataSkins.py:
def __set_attr__(self,name,val,_v_dm_=_v_dm_):
+ if name=='id' and val==self.__dict__['id']:
+ return
dm = self.__dict__[_v_dm_]
This looks reasonable, and backward-compatible, since __init__ guarantees
the dict will have an id. I'm not thrilled with adding more overhead to
attribute setting, however, so I'll probably do it like this:
try:
dm = self.__dict__[_v_dm_]
except KeyError:
if name=='id' and val==self.__dict__['id']: return
raise
Hopefully this should only perform the extra computations when the first
part fails...
Are Python classes derived from DataSkin supposed to call
DataSkin.__init__ ?
Anyway, perhaps this would be a small improvement:
try:
dm = self.__dict__[_v_dm_]
except KeyError:
if (name=='id' and self.__dict__.has_key('id')
and val==self.__dict__['id']): return
raise
--
Steve Alexander
Software Engineer
Cat-Box limited
http://www.cat-box.net
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Re: [Zope-dev] New version of BTreeFolder
Steve Alexander wrote: BTreeFolder doesn't do the from Globals import default__class_init__ default__class_init__(BTreeFolder) thing. Does that matter at all? As none of the classes it is derived from have a __init__ method, I guess not. Or, does default__class_init__ do anything else? It converts __ac_permissions__ into usable permissions declarations (__roles__ attributes.) default__class_init__ really ought to be there; it's only recently that Brian started saying we need to use it everywhere. I forgot. :-) Shane ___ 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] ZPatterns bug with patch
"Phillip J. Eby" wrote:
try:
dm = self.__dict__[_v_dm_]
except KeyError:
if name=='id' and val==self.__dict__['id']: return
raise
Hopefully this should only perform the extra computations when the first
part fails...
Are Python classes derived from DataSkin supposed to call
DataSkin.__init__ ?
Anyway, perhaps this would be a small improvement:
try:
dm = self.__dict__[_v_dm_]
except KeyError:
if (name=='id' and self.__dict__.has_key('id')
and val==self.__dict__['id']): return
raise
What rubbish! I didn't mean that at all!
I think what I meant was this:
try:
dm = self.__dict__[_v_dm_]
except KeyError:
if name=='id':
if self.__dict__.has_key('id') and val==self.__dict__.['id']:
return
else:
self.__dict__['id']=val
return
raise
--
Steve Alexander
Software Engineer
Cat-Box limited
http://www.cat-box.net
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Re: [Zope-dev] ZPatterns bug with patch
Steve Alexander wrote:
What rubbish! I didn't mean that at all!
I think what I meant was this:
try:
dm = self.__dict__[_v_dm_]
except KeyError:
if name=='id':
if self.__dict__.has_key('id') and val==self.__dict__.['id']:
return
else:
self.__dict__['id']=val
return
raise
I think what I *really* meant was this:
try:
dm = self.__dict__[_v_dm_]
except KeyError:
if name=='id':
if self.__dict__.has_key('id') and val==self.__dict__['id']:
return
else:
self.__dict__['id']=val
self._p_changed = 1
return
raise
--
Steve Alexander
Software Engineer
Cat-Box limited
http://www.cat-box.net
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[Zope-dev] ANN: ZWikiZC version 0.7.3 alpha
The ZWikiZC version 0.7.3 alpha completely rely on ZCatalog for looking up WikiPages from WikiNames. No references are stored in the ZWikiZG page letting cutpaste, delete and other management actions ignore updating links. I bellew this is a more scalable solution than in the version 0.7.2 alpha. Bottle neck might be if a page contains alote of WikiNames. I also cleaned it up a bit (remove some hacky stuff from the old ZWiki). Also added are keywords, wiki_meta_types and author_ids. http://www.zope.org/Members/johanc/ZWikiZG/wiki Cheers, Johan Carlsson ___ 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] ANN: ZWikiZC version 0.7.3 alpha
The ZWikiZC version 0.7.3 alpha completely rely on ZCatalog for looking up WikiPages from WikiNames. No references are stored in the ZWikiZG page letting cutpaste, delete and other management actions ignore updating links. I bellew this is a more scalable solution than in the version 0.7.2 alpha. Bottle neck might be if a page contains alote of WikiNames. I also cleaned it up a bit (remove some hacky stuff from the old ZWiki). Also added are keywords, wiki_meta_types and author_ids. http://www.zope.org/Members/johanc/ZWikiZG/wiki Cheers, Johan Carlsson ___ 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 )
