| New Features and Bug Fixes since v0.2, preview 1 |
Fixes and Enhancements since Version 0.5 alpha 3 |
| |
|
| * SEF.DynamicBinding is now SEF.AutoCreated, and all AutoCreatable |
- Added 'config.XMLKey()', an 'IConfigKey' type that can be used to register |
| classes like SEF.App and SEF.Service must now have an '__init__' method |
configuration values for XML attribute and element names under specified |
| that accepts their SEF parent component. This lets such objects have |
XML namespace URI's. Also, there are now '[XML Attributes for nsuri]' and |
| access to the SEF hierarchy during initialization. (Note that this |
'[XML Elements for nsuri]' section types available for use in .ini files. |
| means any '__init__' methods of such classes must be revised to take |
(Replace 'nsuri' with the appropriate XML namespace URI, or use '*' for a |
| this into consideration. See TW.Database.DataModel.Database for an |
wildcard.) |
| example of such a revision.) |
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| |
- 'web.IResource' is gone, replaced by 'web.IPlace'. The notion of a place is |
| Also, I dropped the unused SEF.StaticBinding class. |
broader than the notion of a resource, and we will soon need to have |
| |
other "location" objects that implement 'IPlace'. |
| * 'setupModule()' and 'adviseModule()' will now issue warnings for most |
|
| questionable code structures and variable redefinitions that might not |
- In order to support obtaining the line and column locations of problems in |
| work the way you'd expect or intend under module inheritance. |
XML files, we are now using Python 2.4's version of the 'pyexpat' module, |
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built as 'peak.util.pyexpat'. |
| * Added tests and documentation for 'adviseModule()' API |
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- There's a new class, 'config.IniLoader', that can be used to lazily load |
| * Added a 'test' command to 'setup.py' that installs and then tests all of |
.ini files as configuration. 'IniLoader' instances have an 'iniFiles' |
| TransWarp. (It saves me time running the unit tests while I'm writing |
attribute that lists the configuration sources (filenames/URLs/factories) |
| new code.) |
to be used, and automatically load the .ini files as soon as you try to get |
| |
any configuration data for them. Previously, similar functionality was only |
| * Added warnings for detectable module-level modifications of mutables |
available via 'config.makeRoot()'. |
| in modules which are used for inheritances or advice. Added an API |
|
| function, 'configure(object, attr1=val, attr2=val,...)' to safely |
Also, there's now an 'ini' reference type that instantiates an 'IniLoader' |
| set attributes of mutables that might have been defined in a derived |
for one or more addresses. You can use it like this:: |
| module. |
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[Named Services] |
| * Removed 'Meta.ClassInit' and '__class_init__' support. Use metaclass |
|
| '__init__' methods instead; see 'TW.Database.DataModel.RecordTypeMC' |
some.example = naming.Reference('ini', |
| for one example of the conversion. |
['pkgfile:peak/peak.ini', '/etc/something.ini'] |
| |
) |
| * Added 'SEF.bindToParent()', 'SEF.bindToNames()', and 'SEF.bindToSelf()' |
|
| descriptors, to allow more flexible component parameter bindings. |
another.example = naming.LinkRef( |
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'ref:ini@pkgfile:peak/peak.ini||/etc/something.ini' |
| * Improved key integrity checks in DataModel: Record objects now disallow |
) |
| modification of key fields unless the old value is None, and cache |
|
| collisions between records with supposedly unique keys will result in an |
The two examples above will each load the same pair of specified .ini files. |
| AssertionError. |
You can also directly instantiate an 'IniLoader', as in:: |
| |
|
| * Added 'SET' method (ala WarpCORE's set_X procedures) to |
cfg = config.IniLoader(self, iniFiles=['pkgfile:peak/peak.ini']) |
| TW.Utils.MiniTable. |
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| |
Attempting to look up any configuration properties via the 'cfg' object |
| * Added more docs to TW.Utils.Code, and removed 'iterFromEnd()' method |
will cause it to load the specified .ini file. |
| from code objects. Added experimental 'nextSplit' index to codeIndex |
|
| objects that does top-level block analysis to allow splitting a code |
- 'config.fileNearModule()' is DEPRECATED, in favor of 'config.packageFile()'. |
| object into smaller routines. |
The latter returns a 'naming.IStreamFactory', which is more suitable for |
| |
working with e.g. module data files compressed in a zipfile. Uses of |
| * Fixed the "reference to rebound class within another class" problem |
'fileNearModule()' that were being passed to 'config.loadConfigFile()' can |
| with module inheritance, as reported by (who else?) Ulrich Eck. :) |
be safely changed to 'config.packageFile()' without needing any other code |
| |
changes, but if you were directly using 'fileNearModule()' as a filename, |
| * Rewrote SEF "features" to use 'element.verbFeature()' style methods |
you will need to rewrite appropriately. |
| instead of 'element.feature.verb()' style. UML/XMI/Querying code |
|
| still uses the old-style SEF framework, which is still available from |
- 'config.loadConfigFile()' and 'config.loadConfigFiles()' now accept URLs, |
| 'TW.SEF.FeatureObjects'. See the docs of 'TW.SEF.Basic.FeatureMC' |
'naming.IStreamFactory' objects, and 'config.IStreamSource' objects as well |
| and 'TW.API.Meta.MethodExporter' for details on how new-style methods |
as filenames. This was primarily added to support use of |
| work. |
'config.packageFile()' or 'pkgfile:' URLs, in place of using |
| |
'config.fileNearModule()'. |
| * Fixed misc. bugs in 'DataModel', 'LDAPModel', 'Connections', and |
|
| 'TW.Caching' found by Ulrich Eck. Thanks Ulrich! Also, added a fix |
- There is a new 'config.IStreamSource' protocol, to make it easy to accept |
| to ensure that non-existent records are invalidated by |
URLs, filenames, or 'naming.IStreamFactory' objects as the source of a |
| 'RecordType.getItem()'. |
"file". |
| |
|
| * Added basic Specialist implementation to 'TW.SEF.Basic', and reverted |
Its typical usage is just:: |
| naming from 'TypeService' and 'ITypeService' to 'Specialist' and |
|
| 'ISpecialist'. Updated 'TW.SEF.Interfaces' to reflect "self"-less |
factory = config.IStreamSource(data).getFactory(self) |
| convention for documenting methods. |
stream = factory.open('t') # open for reading in text mode |
| |
|
| * Dropped obsolete 'TW.Database.Records' module. |
where 'data' is a string or a 'naming.IStreamFactory', and 'self' is a |
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component to be used as lookup context. The returned 'factory' is a |
| * Fixed the base class "rebind by name" bugs in module inheritance, and |
'naming.IStreamFactory' that can then be '.open()'-ed for reading, or used |
| updated the documentation to more clearly reflect what it is that |
in other ways as needed. |
| metaclass generation and module inheritance does and does not do. Added |
|
| test cases to prevent regression of the rebind-by-name problem. |
Wherever practical, as we encounter them, we'll be changing PEAK API's that |
| |
take filenames to also accept stream sources. |
| * The 'setup.py' script features a new command, 'happy', which can be used |
|
| to generate the API reference docs, and this command runs as part of the |
- The 'naming.IStreamFactory' interface now has an 'address' attribute, which |
| 'sdist' command to build source distributions. |
is the string form of the canonical URL of the target stream. This was |
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added to make it easier to e.g. report errors in a stream that's being |
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parsed, since the parser only needs the factory in order to report the |
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location of an error. (Note: if you implement 'naming.IStreamFactory', be |
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sure to add this attribute to your implementations.) |
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|
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- The 'peak.util.WSGIServer' module has been moved to the |
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'wsgiref.simple_server' module. The 'wsgiref' reference library for WSGI |
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(aka PEP 333) is now distributed with PEAK. |
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|
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- Added a 'WSGI' command to the 'peak' script, to allow you to run "foreign" |
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(i.e. non-PEAK) PEP 333 applications in PEAK's various servers and |
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launchers. Basically, by prefixing 'WSGI' before the import specifier, you |
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can now run such foreign apps. |
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For example:: |
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peak launch WSGI import:some_app.application |
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will run 'some_app.application' in the local web browser, and:: |
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peak CGI WSGI import:some_app.application |
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will run it under the CGI/FastCGI runner. Similarly, you can use this in |
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the "Command" spec for the "peak supervise" pre-forking FastCGI supervisor |
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subsystem. |
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|
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- There is a new 'running.IWSGIApplication' interface, for PEP 333-compliant |
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"application" objects, and all of PEAK's provided applications now implement |
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it instead of 'running.IRerunnableCGI'. If you write your apps to the newer |
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interface, they'll be portable to any PEP 333-compliant web server, not just |
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the PEAK CGI, FastCGI, and "supervisor" containers. There is a simple |
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adapter that allows 'IWSGIApplication' objects to run in the CGI-based |
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containers, but not the other way around, so using 'IRerunnableCGI' directly |
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now limits your portability. (For example, the "peak launch" and "peak |
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serve" commands will soon require 'IWSGIApplication', and will not support |
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'IRerunnableCGI' any more.) |
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Of course, if you use the 'peak.web' framework, you don't need to worry |
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about any of this; your apps will automatically be wrapped as |
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'IWSGIApplication', and run in any PEAK server or gateway. |
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|
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- Most 'peak.web' interfaces have changed significantly. If you implemented |
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anything based on the older interfaces, and it still works, it's sheer |
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bloody luck. In particular, note that every method in 'web.IWebTraversable' |
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now has different inputs and/or outputs than before. Please read the new |
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interface docs and update your code! The changed interfaces offer much |
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more flexibility and functionality than before, but they will require you to |
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update your code. |
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|
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- 'web.ContainerAsTraversable' has been removed. It was redundant, since the |
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new default traversal mechanism used by 'Traversable' and 'Decorator' now |
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handles getitem, getattr, and views. |
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|
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- Added Zope 3-like "namespaces" to 'peak.web'. Path segments in a URL |
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may be prefixed with '"++some_id++"' in order to invoke a corresponding |
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namespace handler registered under '"peak.web.namespaces.some_id"'. |
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Namespace handlers must implement 'web.INamespaceHandler', and they are |
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supplied with the original path segment as well as the separated namespace |
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and name. Also, as in Zope 3, '"@@foo"' is a shortcut for '"++view++foo"'. |
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Builtin namespaces at this time include 'view', 'item', 'attr', 'skin', and |
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'resources'. 'skin' treats the rest of its path segment as a skin name, |
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and sets the current skin, while 'resources' begins traversal to resources |
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found in the current skin. The other namespaces are as described at: |
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|
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"Resources and traversal in peak.web":http://www.eby-sarna.com/pipermail/peak/2004-August/001712.html |
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- Fixed several 'peak.events' bugs, as reported by Vladimir Iliev, Yaroslav |
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Samchuk, and Alexander Smishlajev: |
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* 'events.AnyOf' could hold multiple references to a single event source, |
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and nesting 'AnyOf()' calls could leak references to the nested events. |
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* 'events.subscribe()' had a potential race condition wherein a callback |
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could be invoked after its weak reference was garbage collected, leading |
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to bizarre error messages about 'self' being 'None'. |
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* 'select()' could be called on select event objects even if there were |
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no current subscribers to the event, potentially leading to calling |
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'select()' on a closed socket. |
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* Non-default signal handlers were remaining installed even when there |
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were no current subscribers to the applicable event, as long as a |
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reference to the event object existed. |
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As a result of these changes, certain I/O event types (esp. signals and |
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stream readable/writeable events) are now longer-lived. For example, |
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signal event objects are now immortal, and the read/write event for a |
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particular 'fileno()' will be reused for as long as its supplying |
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'Selector' or 'EventLoop' instance exists. (Previously, weak references |
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were used so that these objects would be recycled when not in use.) |
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- Added 'config.registeredProtocol()' API, that supports defining named and |
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local protocols. This allows easy emulation of Zope 3's "named" and "local" |
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adapters and views. |
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- 'binding.Component' objects no longer support instance configuration at |
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runtime (i.e., they no longer implement 'config.IConfigurable'). If you |
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need a component to be configurable at runtime, you must now derive from |
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(or mix in) 'binding.Configurable' instead. If you get errors about |
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a missing 'registerProvider' attribute, or about being unable to adapt to |
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'IConfigurable', try changing your base class from 'binding.Component' |
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to 'binding.Configurable', or add it as a mixin if you're deriving from |
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a class that uses 'binding.Component' as its base. |
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|
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- 'binding.IComponent' no longer derives from 'config.IConfigurable' or |
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'config.IConfigMap', only 'config.IConfigSource'. This means that |
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'IComponent' no longer guarantees or requires the presence of the |
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'registerProvider()' method: now only 'config.IConfigurable' does that. |
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|
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- The 'config.IConfigMap' interface is now DEPRECATED. Use |
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'config.IConfigurable' instead. The '_configKeysMatching()' method |
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of 'IConfigMap' was moved to 'config.IConfigSource', so if you've |
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implemented a custom 'IConfigSource', be sure to add this method. |
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|
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- 'web.ISkinService' and 'web.ILayerService' were consolidated into |
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'web.IInteractionPolicy', because the need to have configurable |
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implementations of these services is negligible. That is, the |
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corresponding property namespaces ('peak.web.skins' and 'peak.web.layers') |
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are more than adequate as registries. |
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|
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- Removed 'peak.running.timers' and 'peak.util.dispatch'. Neither was in |
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active use, and both are being replaced by the new generic functions |
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package in PyProtocols. |
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|
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- The 'config.iterParents' API is now moved to 'binding.iterParents', and all |
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'binding' functions that walk the component hierarchy use it. It has also |
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been changed to avoid infinite loops in the case of a pathological |
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component structure. |
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|
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- The 'persistence' package has been moved to 'peak.persistence' to avoid |
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conflicts with ZODB3 and the latest version of Zope 3. It will eventually |
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be phased out, but for now this move is the simplest way to get it out of |
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the way. |
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|
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- The 'peak.util.SOX' module now uses only one parser, based directly on |
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'expat', instead of using SAX. The new parser expects a new node interface, |
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'IXMLBuilder', but adapters from the previous interfaces ('ISOXNode' and |
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'ISOXNode_NS') are supplied for backward compatibility. All of PEAK's |
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direct XML handling (currently just 'peak.storage.xmi' and |
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'peak.web.templates') have been refactored to use the new interface. Some |
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parsing classes (such as 'ObjectMakingHandler', 'NSHandler', and |
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'DOMletParser') are no longer available. |
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|
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- 'peak.web' no longer uses Zope X3 for HTTP publishing support; it has been |
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refactored to use a "simpler, more uniform architecture":http://www.eby-sarna.com/pipermail/peak/2004-May/001462.html |
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See also "more on the architecture":http://www.eby-sarna.com/pipermail/peak/2004-June/001482.html |
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and subsequent posts in that thread. |
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As a consequence, "various features have been removed":http://www.eby-sarna.com/pipermail/peak/2004-June/001500.html |
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from 'peak.web', for possible return at a future date. Here is a rough |
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outline of the changes made so far: |
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* The 'pageProtocol', 'pathProtocol', and 'errorProtocol' machinery are |
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gone. They will be replaced in the future with an explicit "controller" |
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wrapping mechanism to allow application-specific renderings of the same |
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underlying components. |
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* The Zope 'request' and 'response' objects are gone, along with all of |
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their special handling for cookies, character sets, form variables, |
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automatically marshalling parameters to functions, etc. These items of |
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functionality will be gradually replaced by functions in 'peak.web.api'. |
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As a result of this, arbitrary functions and methods can no longer be |
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used as web pages; instead, functions and methods to be published must |
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use the same inputs and outputs as the 'IHTTPHandler.handle_http()' |
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method. |
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* The 'IWebPage', 'IWebInteraction', 'ITraversalContext', 'Traversal', |
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'TraversalContext', and 'Interaction' interfaces and classes no longer |
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exist, as they are unneeded in the new architecture. Instead of |
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having a central 'IWebInteraction' that's referenced by numerous |
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'ITraversalContext' objects, the new approach uses an 'environ' mapping |
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for most functions. For access control, a 'security.IInteraction' is |
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now used, whose function is limited to security checks. Most |
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functions previously performed by 'IWebInteraction' have moved to |
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'IInteractionPolicy' or to 'peak.web.api' functions operating on |
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'environ' mappings. |
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|
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* Web exceptions can define a 'levelName' attribute that determines the |
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severity level with which the exception will be logged. This allows |
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one to e.g. avoid logging tracebacks for 'NotFound' errors. |
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|
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* Various interface calling signatures have changed slightly. For example, |
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'IAuthService.getUser()' now accepts an 'environ' mapping instead of |
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an interaction. 'IInteractionPolicy.newInteraction()' now takes keyword |
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arguments, but not a 'request'. The 'IWebTraversable' interface no longer |
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has a 'getObject()' method, and the 'IWebException.handleException()' |
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method signature has changed as well. Finally, all methods that |
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previously accepted 'ITraversalContext' (such as |
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'IDOMletState.renderFor()') now expect 'environ' mappings. |
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|
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* 'web.TestInteraction' was replaced with 'web.TestPolicy', and |
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'web.Interaction' was removed, since 'IWebInteraction' is no longer part |
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of the architecture. |
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|
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- The 'log()' method of PEAK loggers ('logs.ILogger') now accepts a level name |
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*or* a number, for convenient invocation. |
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|
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- SQL transaction semantics have changed. Now, issuing an SQL statement |
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*always* causes the connection to join the active PEAK transaction, even if |
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you request that the SQL be issued "outside" a transaction. Such SQL will |
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be issued outside of the *database* transaction, but not outside of the |
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PEAK transaction. This simplifies the overall processing model for dealing |
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with "untransacted" SQL such as Sybase DDL or read-only Oracle transactions. |
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(In particular, the requirement that triggered this change was to allow |
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Oracle read-only transactions to be released at the end of the current PEAK |
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transaction.) Also, got rid of the now-meaningless 'begin' command in n2. |
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|
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- The 'events.IEventSource' interface now returns a 'canceller' function from |
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the 'addCallback()' method, allowing you to cancel a previously-scheduled |
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callback. This fixes a memory leak and performance problem with |
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'events.AnyOf()', which previously could accumulate unneeded callbacks on |
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the sources it was monitoring. Note that if you have developed any custom |
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event sources with 'addCallback()' methods, you must make sure that they |
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return a canceller from now on. |
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|
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- Added 'ref:factory@addr1||addr2' URL scheme that maps to a corresponding |
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'naming.Reference("factory",["addr1","addr2"])'. 'factory' can be either a |
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dotted import string referencing a 'naming.IObjectFactory', or you can |
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define a factory in the 'peak.naming.factories' property space. |
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|
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- Added a 'zconfig.schema' factory, so that 'ref:zconfig.schema@streamURL' |
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will load a schema loader. Schema loaders are themselves object factories, |
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so you can do something like:: |
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|
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[Named Services] |
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peak.naming.factories.myschema = \ |
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naming.LinkRef('ref:zconfig.schema@pkgfile:mypkg/Schema.xml') |
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|
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in order to make URLs like 'ref:myschema@filename' work. Note, by the way, |
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that the above could also read:: |
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|
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[Named Services] |
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peak.naming.factories.myschema = \ |
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naming.Reference('zconfig.schema',['pkgfile:mypkg/Schema.xml']) |
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|
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which runs somewhat faster at lookup time. Similarly, one can also use |
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'naming.Reference("myschema",["somefile"])' in place of a |
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'naming.LinkRef("ref:myschema@filename")'. As well as being faster, for |
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some use cases it's easier to 'Reference' directly than to glue together |
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a 'ref:' URL string. |
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| * The API reference docs in the source distribution has been moved from |
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| the 'doc' directory to 'docs/html/reference'. |
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| * Added 'CHANGES.txt' file. |
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Diff of /PEAK/CHANGES.txt
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