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| Changed, Enhanced, or Newly Deprecated Features |
Changed, Enhanced, or Newly Deprecated Features |
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- .ini files now support "smart property" objects ('config.ISmartProperty'). |
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If a property rule defined in an .ini file evaluates at runtime to an object |
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that implements 'ISmartProperty', the object will be given a chance to |
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compute a value for the property, in place of being used itself. This helps |
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to simplify definition of complex property rules in .ini files, by allowing |
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the use of helper classes. Also, 'naming.LinkRef' and 'naming.Reference' |
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(indirectly) support this interface, so you can now use them in .ini files |
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to refer to an object via the naming system. (Previously, 'naming.LinkRef' |
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wouldn't do the right thing unless the property was looked up via a |
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'config:' URL, and 'naming.Reference' didn't exist.) |
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- 'peak.util.imports.whenImported()' can now be used even when the specified |
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module has already been loaded. |
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- The naming system no longer has 'objectFactories' and 'stateFactories' as |
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utilities; they have been replaced with new mechanisms involving adaptation. |
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Previously, addresses had a 'retrieve()' method that could be used to |
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retrieve the object defined by the address. Now, to retrieve an object for |
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an address, you must either define a context that processes the address, or |
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the address must have a 'defaultFactory' attribute, which provides a name |
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to be imported to get an 'IObjectFactory' that can construct the referenced |
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object. (This is simpler than it sounds; for URLs that reference |
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ManagedConnections, for example, all you need to do is provide the fully |
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qualified name of the connection class.) |
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Meanwhile, writable naming contexts must have a 'serializationProtocol' |
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attribute, specifying what interface an object should be adapted to before |
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attempting to store it in that context. |
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The naming system no longer processes the 'creationName' keyword argument; |
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this is now considered the sole responsibility of 'peak.binding'. The |
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'IComponent.lookupComponent()' method still accepts the keyword argument, |
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and attribute bindings still handle the creation name transparently. It is |
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just not available via naming system APIs, and naming contexts no longer |
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have to deal with it. |
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|
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The naming system base classes no longer use 'attrs' as an input parameter |
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or return value. If you've subclassed anything from 'peak.naming.contexts', |
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note that your '_get()' methods should now just return the lookup value, |
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rather than a 'state,attrs' tuple. For most naming contexts, this just |
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means you should change 'return foo, None' statements to just 'return foo'. |
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- Property definition rules in an .ini file can now refer to 'rulePrefix' and |
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'ruleSuffix' variables. 'rulePrefix' is a '.'-terminated string, |
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representing the name the rule was defined with. For example, if the |
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rule was defined for '"foo.bar.*"', then 'rulePrefix' will be '"foo.bar."'. |
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The 'ruleSuffix' will be the portion of the 'propertyName' that follows |
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'rulePrefix'. So, if looking up property '"foo.bar.baz"', then the |
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'"foo.bar.*"' rule will execute with a 'ruleSuffix' of '"baz"'. This should |
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make it easier to work with hierarchical property namespaces. |
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- Added simple example scripts and small applications in the 'examples' |
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directory. |
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- There is a new command-line namespace introspection tool, 'n2', which |
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can be accessed by running 'peak n2'. Type 'peak n2 -h' for help. |
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- The PEAK_CONFIG environment variable can now list multiple files, separated |
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by the platform's 'os.pathsep' (e.g. ':' on Unix, ';' on Windows). |
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- It's no longer necessary to provide a '_defaultState()' implementation |
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for an EntityDM: a default implementation is now supplied. |
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| - Added automatic installation of 'datetime' package for Python < 2.3. |
- Added automatic installation of 'datetime' package for Python < 2.3. |
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| - CGI support has been moved from 'peak.running.zpublish' into |
- CGI support has been moved from 'peak.running.zpublish' into |
| identify active descriptors, so you can now create your own. (Previously, |
identify active descriptors, so you can now create your own. (Previously, |
| 'peak.binding' used 'isinstance()' to detect active descriptors.) |
'peak.binding' used 'isinstance()' to detect active descriptors.) |
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| - 'peak.naming' no longer automatically converts all addresses to the |
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| addressed objects. You must specifically request the interface you want |
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| by adapting the retrieved object to that interface. This can be done by |
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| supplying an 'adaptTo=ISomething' keyword argument to the attribute binding |
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| definition or your 'lookupComponent()' call. |
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| The naming system no longer has 'objectFactories' and 'stateFactories'; |
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| these have been replaced with adaptation. Writable naming contexts must |
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| have a 'serializationProtocol' attribute specifying what interface an object |
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| should be adapted to before attempting to store it in that context. |
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| |
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| The naming system no longer processes the 'creationName' keyword argument; |
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| this is now considered the sole responsibility of 'peak.binding'. The |
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| 'IComponent.lookupComponent()' method still accepts the keyword argument, |
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| and attribute bindings still handle the creation name transparently. It is |
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| just not available via naming system APIs, and naming contexts no longer |
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| have to deal with it. |
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| The naming system base classes no longer use 'attrs' as an input parameter |
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| or return value. If you've subclassed anything from 'peak.naming.contexts', |
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| note that your '_get()' methods should now just return the lookup value, |
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| rather than a 'state,attrs' tuple. For most naming contexts, this just |
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| means you should change 'return foo, None' statements to just 'return foo'. |
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| - REMOVED 'naming.ParsedURL'; it was deprecated as of 0.5 alpha 2. |
- REMOVED 'naming.ParsedURL'; it was deprecated as of 0.5 alpha 2. |
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| - The 'provides' keyword argument to various 'peak.binding' APIs has been |
- The 'provides' keyword argument to various 'peak.binding' APIs has been |
| a binding to suggest a parent component, use 'suggestParent=False' in the |
a binding to suggest a parent component, use 'suggestParent=False' in the |
| binding definition. |
binding definition. |
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Corrected Problems |
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- There was a typo in peak.naming.arithmetic that caused homogeneous non-URL |
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name subtraction to fail. |
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- The default reactor supplied in 'peak.running.scheduler' would consume |
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CPU continuously if it was waiting for I/O and no tasks were scheduled. |
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- The 'peak.util.imports.whenImported' function didn't work. |
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Diff of /PEAK/CHANGES.txt
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Revision Log