| |
Fixes and Enhancements since Version 0.5 alpha 2 |
| |
|
| |
Changed, Enhanced, or Newly Deprecated Features |
| |
|
| |
- Added 'events.IEventLoop' implementation and refactored 'UntwistedReactor' |
| |
to use it. 'UntwistedReactor' is now nothing more than an adapter from |
| |
'events.IEventLoop' to 'running.IBasicReactor'. Added 'twisted_support' |
| |
versions of 'peak.events' interfaces (untested). |
| |
|
| |
- 'running.ISignalManager' is now DEPRECATED; please use 'events.ISignalSource' |
| |
instead. |
| |
|
| |
- Added 'events.ISignalSource', that returns 'events.Broadcaster' objects for |
| |
signals. This allows you to yield to signals in an 'events.Thread', or |
| |
safely set one-time callbacks on them. |
| |
|
| |
- 'running.IMainLoop' has been changed to use an 'events.IReadable' for |
| |
the 'lastActivity' attribute, and the 'setExitCode' and 'childForked' |
| |
methods have been replaced with an 'exitWith()' method. |
| |
|
| |
- The 'peak.running.mainLoop.signalHandler' property has been replaced with |
| |
'peak.running.mainLoop.stopOnSignals', which defaults to including SIGINT, |
| |
SIGTERM, and SIGBREAK. If you need custom signal handling, please use |
| |
the event sources provided by an 'events.ISignalSource'. |
| |
|
| |
- Simplified configuration for using Twisted, roughly as proposed in |
| |
"this message.":http://www.eby-sarna.com/pipermail/peak/2004-January/001125.html |
| |
|
| |
You can now configure a service area as using Twisted by setting its |
| |
'peak.events.isTwisted' property, or by depending upon the |
| |
'running.ITwistedReactor' interface, as long as it happens early enough. |
| |
|
| |
If you need to make choices based on whether a Twisted reactor is being |
| |
used, you should use the 'events.ifTwisted()' function. If you would like |
| |
to try to force a service area to use a Twisted reactor, you may use |
| |
'events.makeTwisted()'. |
| |
|
| |
- Added automatic installation of 'csv' module for Python < 2.3. |
| |
|
| |
- Added 'peak.events' package, supporting a simple event-driven programming |
| |
microkernel, including event-driven "ultralight" threads powered by |
| |
generators. |
| |
|
| |
- "Global" services defined by '[Component Factories]' sections now live in |
| |
the closest "service area" to the component that requests them. A "service |
| |
area" is a parent component that implements 'config.IServiceArea', such as |
| |
a configuration root returned by 'config.makeRoot()'. Applications loaded |
| |
by the 'peak runIni' command are now created in their own service area, |
| |
which means that settings in the .ini file being run will apply to services |
| |
the application uses. (Because the application will have its own, |
| |
application-specific service instances, and they will use the configuration |
| |
loaded into the service area.) |
| |
|
| |
If you need to create your own service area, you can do so by mixing in |
| |
'config.ServiceArea' to your component class. However, you should *not* do |
| |
this unless you know exactly what "outside" services you may need to use |
| |
from "inside" the newly created service area, so that you can explicitly |
| |
connect them "into" the service area. (In short, if you don't know *why* |
| |
you're creating a service area, don't do it.) |
| |
|
| |
- 'config.Namespace()' objects now have a 'keys()' method that can be used |
| |
when the namespace is bound to a context component. It returns a list of |
| |
strings that may be used as keys for that namespace. Example usage:: |
| |
|
| |
>>> from peak.api import * |
| |
>>> r=config.makeRoot() |
| |
>>> ns=config.Namespace('peak.naming.schemes',r) |
| |
>>> ns.keys() |
| |
['https', 'smtp', 'logfile', 'psycopg', 'pkgfile', 'unix.dg', 'win32.dde', |
| |
'sybase', 'timer', 'lockfile', 'pgsql', 'fd.socket', 'uuid', 'tcp', 'file', |
| |
'gadfly', 'http', 'logger', 'icb', 'cxoracle', 'udp', 'winflockfile', |
| |
'import', 'logging.logger', 'nulllockfile', 'nis', 'shlockfile', |
| |
'zconfig.schema', 'flockfile', 'shellcmd', 'dcoracle2', 'config', 'ftp', |
| |
'unix', 'ldap', 'sqlite', 'mockdb'] |
| |
>>> ns['ldap'] |
| |
'peak.storage.LDAP:ldapURL' |
| |
|
| |
- Log events don't use a positional 'message' argument any more, and |
| |
loggers aren't responsible for interpolating message arguments any more. |
| |
The new signature is 'Event(parent, msg=msg, args=args, ...)'. Loggers |
| |
also now tell events what logger name they are, via the 'ident' keyword. |
| |
|
| |
- The logging system now uses a property namespace, 'peak.logging.levels', to |
| |
obtain log level names and values. The various 'logs.LEVEL' constants are |
| |
now DEPRECATED. Please use the 'getLevelFor()' method of the nearest |
| |
'logs.ILoggingService' instead. Also note that URL schemes such as |
| |
'logfile:' no longer convert their level names to numbers, since the |
| |
level names are only meaningful in the context of a logging service. |
| |
|
| |
- Support for integration with the Python 2.3/PEP 282 logging module has been |
| |
scaled back. There are too many globalisms and dependencies there. When we |
| |
add plugin-based log configuration, it should be possible to use the logging |
| |
package's handlers and formatters with the PEAK logging services. At that |
| |
point, you'll be able to replace 'logging.getLogger' and |
| |
'logging.getLevelName' with the corresponding methods of a PEAK logging |
| |
service, if you need to force non-PEAK packages to use PEAK's logging. |
| |
|
| |
- Logs are now accessed via a 'logs.ILoggingService' instance. The 'logger:' |
| |
URL scheme automatically accesses the nearest such service. For backward |
| |
compatibility, the old 'peak.logs' namespace is still used to supply the |
| |
actual loggers. This will be gradually replaced with a plugin-based |
| |
mechanism. |
| |
|
| |
- Added 'binding.PluginKeys' and 'binding.PluginsFor'. These are component |
| |
keys that can be used to 'Obtain' plugins registered within a property |
| |
namespace. 'PluginKeys' obtains a list of the plugins' configuration keys, |
| |
while 'PluginsFor' obtains a list of the actual plugins. |
| |
|
| |
- Replaced 'peak.config.registries.EigenRegistry' with |
| |
'peak.config.registries.ImmutableConfig'. The only use we had for |
| |
'EigenRegistry' was to keep track of 'offerAs' settings within classes, and |
| |
it didn't need all the extra complexity of eigenstate management. The new, |
| |
more-specialized class is shorter, simpler, and easier to use. |
| |
|
| |
- Added 'config.iterKeys()' which iterates over all available configuration |
| |
keys in a given namespace (just property names for now). The 'config:' |
| |
namespace is now a 'naming.IReadContext', so you can navigate it with the |
| |
'n2' command, and do things like 'ls -l config:peak.naming.schemes' to list |
| |
all configured naming schemes. |
| |
|
| |
- Added 'config.parentProviding()' and 'config.parentsProviding()', which |
| |
find the first (or all) parent components of a given component that support |
| |
a given protocol. |
| |
|
| |
- Renamings/refactorings/deprecations in 'peak.config': |
| |
|
| |
'config.getProperty' -- use 'config.lookup()' instead |
| |
|
| |
'config.findUtility' -- use 'config.lookup()' instead |
| |
|
| |
'config.findUtilities' -- use 'config.iterValues()' instead |
| |
|
| |
'config.IPropertyMap' -- use 'config.IConfigMap' or 'config.IConfigurable' |
| |
|
| |
'config.PropertyMap' -- use 'config.ConfigMap' instead |
| |
|
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'config.setPropertyFor' -- DEPRECATED, see source for replacement code. |
| |
|
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'config.setRuleFor' -- DEPRECATED, see source for replacement code. |
| |
|
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'config.setDefaultFor' -- DEPRECATED, see source for replacement code. |
| |
|
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'config.instancePerComponent' -- DEPRECATED, use factories instead. |
| |
|
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'config.IConfigurationRoot' -- interface has changed; 'propertyNotFound' is |
| |
no longer a method, and 'noMoreUtilities' is now 'noMoreValues'. |
| |
|
| |
'exceptions.PropertyNotFound' -- use 'exceptions.NameNotFound' instead. |
| |
|
| |
'exceptions.OutOfScope' -- REMOVED; it was not actually used in PEAK. |
| |
|
| |
In all cases, the old interface, class, or function is DEPRECATED and will |
| |
go away in the alpha 4 release cycle. Please take particular note of the |
| |
fact that 'IConfigMap' offers virtually none of the convenience |
| |
methods provided by 'IPropertyMap', so adjust your code accordingly. Note |
| |
also that even though there are plenty of references to 'IPropertyMap' |
| |
remaining in PEAK itself, these are strictly to provide backward |
| |
compatibility. Once we enter the alpha 4 release cycle, these will go away. |
| |
|
| |
- Added 'config.MultiKey()' and 'config.UnionOf()' configuration key classes, |
| |
to generalize existing specialty keys such as 'ProviderOf' and 'FactoryFor'. |
| |
(The latter two are now defined in terms of the former two.) Also, made |
| |
classes and types usable as configuration keys. This was needed for the |
| |
above generalization, but also makes many other class-lookup concepts |
| |
possible. (Note that there may be some slight changes to the effective |
| |
registration and lookup order of these and other configuration keys as of |
| |
this change, as there were some previous errors and/or ambiguities to the |
| |
lookup order that were not covered by the test suite.) |
| |
|
| |
- Added "[Import on Demand]" section type to .ini files, allowing you to |
| |
define shortcuts for modules that you frequently reference in your |
| |
configuration. This lets you replace e.g. 'importString("foo.bar.baz:Spam")' |
| |
with 'foo_baz.Spam' in expressions, by adding something like this:: |
| |
|
| |
[Import on Demand] |
| |
foo_bar = "foo.bar.baz" |
| |
|
| |
to your configuration. The defined shortcut is then available for the |
| |
remainder of that configuration file, and in any .ini files included from |
| |
the current file. See 'peak.ini' for an example and more info. |
| |
|
| |
- Logging-related interfaces have been moved into the 'peak.running.logs' |
| |
module. So, what used to be 'running.ILogger' is now 'logs.ILogger'. |
| |
|
| |
- Log events now use a standard component construction signature, and the |
| |
class used for event objects is now configurable as the factory for |
| |
'logs.ILogEvent'. (See "[Component Factories]" in 'peak.ini'.) |
| |
|
| |
- By popular demand, 'logs.ILogger' (and its default implementation) now |
| |
includes 'trace()', 'notice()', 'alert()' and 'emergency()' methods that use |
| |
the corresponding 'syslog' priority levels. 'logs.IBasicLogger' has been |
| |
added, to reflect the narrower interface provided by PEP 282, and there is |
| |
an adapter that can extend PEP 282 loggers with the other methods. |
| |
|
| |
- The 'logging.logger:' URL scheme has been simplified to 'logger:'. Please |
| |
convert your scripts and configuration files, as the longer form will go |
| |
away in the alpha 4 development cycle. |
| |
|
| |
- Added 'commands.lookupCommand()' to look up a command shortcut or URL, ala |
| |
the 'peak' script or 'commands.Bootstrap' class. Also added various |
| |
'commands.ErrorSubcommand' subclasses to make it easier to issue errors |
| |
from/for subcommands. |
| |
|
| |
- Added 'peak.core' as a minimal subset of 'peak.api'. 'peak.core' offers |
| |
only "core" API packages and primitives, not the full set of available |
| |
framework APIs. 'peak.api' will continue to expand as frameworks are added, |
| |
but 'peak.core' will stay as small as practical. ('peak.exceptions' may in |
| |
fact end up being removed from 'peak.core', or at least renamed.) |
| |
|
| |
- Added 'peak.util.symbol' module, to contain 'NOT_GIVEN', 'NOT_FOUND', and |
| |
the 'Symbol' class used to create them. |
| |
|
| |
- 'peak.running.tools' was promoted to 'peak.tools'. 'peak.running.supervisor' |
| |
was also moved to 'peak.tools.supervisor', and a new 'peak help' command was |
| |
added in 'peak.tools.api_help'. |
| |
|
| |
- Replaced the "[Provide Utilities]" section of .ini files with "[Component |
| |
Factories]". The new section type is easier to use, much more versatile, |
| |
and does all registration and imports lazily. See the 'peak.ini' file for |
| |
docs. "[Provide Utilities]" and 'config.ProvideInstance()' are now |
| |
DEPRECATED, so please convert ASAP. |
| |
|
| |
- 'binding.Make()' now accepts configuration keys, using them to look up a |
| |
factory object that's then invoked to create the attribute. This makes it |
| |
a lot easier to define a component with its own transaction service |
| |
or other normally "global" component. It also makes it easier to globally |
| |
specify a factory class for some interface. Factories are looked up under |
| |
the 'config.FactoryFor(key)' configuration key. (See below.) |
| |
|
| |
- Added 'config.FactoryFor(key)', a 'config.IConfigKey' implementation that |
| |
provides a configuration namespace for factories. |
| |
|
| |
When you use 'binding.Make(ISomething)', it's roughly equivalent to:: |
| |
|
| |
binding.Make( |
| |
lambda self,d,a: |
| |
binding.lookupComponent( |
| |
self, config.FactoryFor(ISomething), |
| |
adaptTo = binding.IRecipe |
| |
)(self,d,a) |
| |
) |
| |
|
| |
That is, the 'config.FactoryFor(ISomething)' is looked up and invoked. |
| |
|
| |
- Added 'config.CreateViaFactory(key)', a 'config.IRule' implementation that |
| |
creates an implementation of 'key', by looking up 'config.FactoryFor(key)' |
| |
and invoking it. |
| |
|
| |
- Added 'config.ruleForExpr(name,expr)', that returns a 'config.IRule' that |
| |
computes the Python expression in the string 'expr'. This is the mechanism |
| |
used by configuration files to create rules, factored out into an API call |
| |
so that configuration extensions can use it, too. |
| |
|
| |
- The 'referencedType' of a 'model.StructuralFeature' can now be any |
| |
'binding.IComponentKey', not just a type or a string. Types are also now |
| |
implicitly component keys, which means you can use 'binding.Obtain(SomeType)' |
| |
to look up 'SomeType'. (Right now, this is no different than using 'SomeType' |
| |
without the 'binding.Obtain()', but in future releases this will use a |
| |
"class replacement service" to allow easy replacement of model and other |
| |
collaborator classes, while implementing AOP-like features.) |
| |
|
| |
- Added 'naming.Indirect(key)', a 'binding.IComponentKey' that can be used to |
| |
do an indirect lookup via another 'IComponentKey' (such as a name). |
| |
|
| |
Using 'naming.Indirect()', you can replace code like this:: |
| |
|
| |
socket = binding.Obtain( |
| |
lambda self: self.lookupComponent(self.socketURL), |
| |
adaptTo=[IListeningSocket] |
| |
) |
| |
|
| |
with code like this:: |
| |
|
| |
socket = binding.Obtain( |
| |
naming.Indirect('socketURL'), adaptTo=[IListeningSocket] |
| |
) |
| |
|
| |
- Added 'peak.tools.supervisor', a mini-framework for pre-forking, |
| |
multiprocess servers, such as for FastCGI. The framework includes a ZConfig |
| |
schema for process supervisors, and support for automatically forking new |
| |
children (up to a predefined maximum, with a minimum interval between |
| |
launches) when a socket has pending connections and all of its child |
| |
processes are busy. With this setup, you can take more advantage of |
| |
multiprocessor machines for CPU-intensive services. |
| |
|
| |
- Standardized these characteristics of name and address syntax: |
| |
|
| |
* '//' at the beginning of URL bodies is *mandatory* when the URL begins |
| |
with an "authority" as described by RFC 2396. When the URL is not |
| |
required to contain an authority (e.g. 'peak.storage.SQL.GenericSQL_URL'), |
| |
the '//' is *optional*, and the canonical form of the URL will not include |
| |
it. |
| |
|
| |
* Standardized names for RFC 2396 fields: 'user', 'passwd', 'host', and |
| |
'port'. |
| |
|
| |
- Added 'peak.metamodels.ASDL', a metamodel for the Zephyr Abstract Syntax |
| |
Description Language. ASDL is a convenient way to describe a domain model |
| |
for an abstract syntax tree (AST), and the models generated with the new |
| |
ASDL tool can be combined with concrete syntax to create a complete parsing |
| |
solution for "mini languages", possibly including the Python language |
| |
itself. (Future versions of the Python and Jython compilers are likely to |
| |
use AST models based on ASDL, and in the current Python CVS sandbox there's |
| |
already an ASDL model of Python's AST available.) |
| |
|
| |
- Enhanced 'fmtparse' and 'peak.model' to allow using types as syntax rules |
| |
for parsing, including abstract types. An abstract type's syntax is the |
| |
union (using 'fmtparse.Alternatives') of the syntaxes of its subclasses |
| |
(as specified by 'mdl_subclassNames'). |
| |
|
| |
- Added 'IMainLoop.exitWith()' method, to allow reactor-driven components to |
| |
control the mainloop's exit code. |
| |
|
| |
- Added 'IBasicReactor.crash()', which forces an immediate reactor loop exit, |
| |
ignoring pending scheduled calls. |
| |
|
| |
- Added 'peak.running.commands.runMain()', a convenience function for starting |
| |
an application's "main" command, that also makes it easy for forked child |
| |
processes to exit and replace the parent process' "main". The 'peak' script |
| |
has now been shortened to:: |
| |
|
| |
from peak.running import commands |
| |
commands.runMain( commands.Bootstrap ) |
| |
|
| |
so it's now much easier to create alternative startup scripts, if you need |
| |
to, or to add an 'if __name__=="__main__"' clause to a module. |
| |
|
| |
- Added 'peak.util.mockdb', a "mock object" implementation of a DBAPI 2.0 |
| |
driver module. 'mockdb' connections can be told to 'expect()' queries |
| |
and 'provide()' data to their callers, and will raise AssertionErrors when |
| |
they are used in a way that doesn't conform to your supplied expectations. |
| |
This is intended to be used for unit testing components that depend on |
| |
a database connection: you can verify that they send the right SQL, and |
| |
you can provide them with dummy data to use. There is also a 'mockdb:' URL |
| |
and peak.storage driver, so you can easily use a mock DB connection in place |
| |
of a real one within a PEAK application, for testing purposes. Note, |
| |
however, that 'peak.util.mockdb' is a DBAPI 2.0 driver in itself, and thus |
| |
can also be used to test DBAPI usage outside of PEAK. |
| |
|
| |
- SQL connection objects now provide an 'appConfig' attribute that is a |
| |
driver-specific 'config.Namespace()'. This allows you to easily set up |
| |
configuration properties that are driver-specific. For example, you could |
| |
use properties to configure driver-specific SQL snippets, then access them |
| |
via the connection's 'appConfig' namespace. The namespaces are of the form |
| |
'DRIVER.appConfig', where 'DRIVER' is the name of the DBAPI module for that |
| |
connection type (e.g. 'pgdb', 'cx_Oracle', etc.). |
| |
|
| |
- Added 'config.Namespace()' convenience class for redirecting property |
| |
lookups from one namespace to another. See the docstring and 'peak.ini' for |
| |
usage examples. 'PropertyName.of()' now returns 'Namespace' instances |
| |
instead of 'PropertySet' instances. |
| |
|
| |
- DEPRECATED the 'config.PropertySet' class; please convert to using |
| |
'config.Namespace', as 'PropertySet' will disappear in the 0.5alpha4 release |
| |
cycle. |
| |
|
| |
- SQL connection objects now get their type converters from a distinct |
| |
property namespace for each DBAPI driver. For example a driver using the |
| |
'cx_Oracle' module will get its type converters from the |
| |
'cx_Oracle.sql_types' property namespace, instead of 'peak.sql_types'. For |
| |
backward compatibility, these driver-specific namespaces are set up to |
| |
fall back to 'peak.sql_types' for their defaults. Type converter |
| |
construction has also been improved, to eliminate conversion overhead |
| |
completely when no conversions are required for a specific query. Also, |
| |
SQL connections now offer a method that will create a row conversion |
| |
function for a given result description and optional postprocessing |
| |
function. This new method should now be used in place of direct access to |
| |
the 'typeMap' attribute of connection objects. |
| |
|
| |
- Added 'binding.Require', 'binding.Obtain', 'binding.Make', and |
| |
'binding.Delegate'. *ALL* other binding types are now DEPRECATED, and will |
| |
go away before 0.5 beta is released: |
| |
|
| |
'requireBinding("info")' -- use 'Require("info")' |
| |
|
| |
'delegateTo("attr")' -- use 'Delegate("attr")' |
| |
|
| |
'New(type)' -- use 'Make(type)' |
| |
|
| |
'New("module.type")' -- use 'Make("module.type")' |
| |
|
| |
'bindTo(key)' -- use 'Obtain(key)' |
| |
|
| |
'Constant(value)' -- use 'Make(lambda: value)' |
| |
|
| |
'Acquire(key)' -- use 'Obtain(key, offerAs=[key,])' |
| |
|
| |
'Copy(value)' -- use 'Make(lambda: <expr to copy value>)' |
| |
|
| |
'whenAssembled(func)' -- use 'Make(func, uponAssembly=True)' |
| |
|
| |
'bindSequence(key1,key2,...)' -- use 'Obtain([key1,key,...])' |
| |
|
| |
'bindToProperty(x,y)' -- use 'Obtain(PropertyName(x),default=y)' |
| |
|
| |
'bindToParent()' -- use 'Obtain("..")' |
| |
|
| |
'bindToSelf()' -- use 'Obtain(".")' |
| |
|
| |
'bindToUtilities()' -- no replacement; let me know if you're using this. |
| |
|
| |
Note that 'Make' and 'Obtain' also support sequences of recipes and keys, |
| |
and in those cases will produce a sequence of the results from those recipes |
| |
or keys. Also, 'Make' will accept no-argument and one-argument callables, |
| |
where 'Once' always required three-argument functions. This should make it |
| |
a lot easier to write short binding functions. |
| |
|
| |
Also, note that the 'activateUponAssembly' keyword is now 'uponAssembly', |
| |
and 'isVolatile' is now 'noCache'. (The old names will work as keyword |
| |
arguments until the alpha 4 development cycle begins.) The |
| |
'binding.IActiveDescriptor' interface also changed as a result of this. |
| |
Last, but not least, a 'binding.IRecipe' interface was added, to support the |
| |
new 'binding.Make' type. |
| |
|
| |
|
| |
- Added a 'lockName' attribute to 'runnning.AdaptiveTask', and a 'LockURL' |
| |
setting to its ZConfig schema. This allows a lockfile URL to be specified |
| |
for adaptive tasks that need exclusive access to some resource while |
| |
running. |
| |
|
| |
- A list or tuple of 'IComponentKey' instances is now treated as a single |
| |
component key, that returns a tuple of the values returned by each |
| |
constituent component key. This means that 'binding.Obtain()' and |
| |
'lookupComponent()' can now accept a list or tuple of component keys. This |
| |
makes 'bindSequence()' obsolete, so 'bindSequence()' is now DEPRECATED. |
| |
'binding.bindSequence(key1,key2,...)' can now be replaced with |
| |
'binding.Obtain([key1,key,...])', and will produce the same results. |
| |
|
| |
- 'naming.IBasicContext.lookup()' and 'naming.lookup()' now accept a 'default' |
| |
argument, similar to that used by 'lookupComponent()' and most other |
| |
lookup-like APIs in PEAK. This change was made so that component lookups |
| |
don't need to rely on catching 'exceptions.NameNotFound' errors to tell them |
| |
when to use the default value. This could hide 'NameNotFound' errors that |
| |
were actually from a broken component somewhere in the lookup process. (In |
| |
general, it's probably a bad idea to have an exception that's used for both |
| |
control flow and real errors!) |
| |
|
| |
- Added new 'version' tool that automatically edits files to update version |
| |
information in them. Just execute the 'version' file in the main PEAK |
| |
source directory. (Use '--help' for help.) You can use this tool with your |
| |
own projects by creating 'version' and 'version.dat' files in your project |
| |
directory, similar to the ones used by PEAK. The 'version' file is a ZConfig |
| |
file that describes your project's version numbering scheme(s), formats, |
| |
and the files that need to be edited, while the 'version.dat' file contains |
| |
the current version number values. Source for the tool, including the |
| |
configuration file schema, is in the 'peak.tools.version' package. |
| |
(Error handling and documentation, alas, are still minimal.) |
| |
|
| |
- Added new 'Alias' command in 'peak.running.commands'. An 'Alias' instance |
| |
can be used as a 'peak.running.shortcut' property that expands to another |
| |
command with arbitrary arguments inserted before the original command's |
| |
arguments. Thus, one might alias 'mycommand' to 'runIni somefile --option', |
| |
similar to command aliases in many shells. |
| |
|
| |
- 'naming.IName' is now derived from 'binding.IComponentKey', so names and |
| |
addresses must now support the 'findComponent()' method. All PEAK name and |
| |
address types provide support for this. |
| |
|
| |
- The 'lookup()' method of 'binding.IComponentKey' is now called |
| |
'findComponent()', to better distinguish it from 'lookup()' in |
| |
'naming.IBasicContext', which does something very different. |
| |
|
| |
- 'binding.Obtain()' (formerly 'binding.bindTo()' and 'binding.bindSequence()') |
| |
now pre-adapt their arguments to 'IComponentKey', to speed up lookups at |
| |
runtime, and to ensure that errors due to an unusable parameter type occur |
| |
at class creation time instead of waiting until lookup time. |
| |
|
| |
- There's a new 'peak.storage.files' module, with handy classes like |
| |
'EditableFile'. 'EditableFile' is a class that lets you edit the contents |
| |
of a file "in place", with atomic replacement of the original at transaction |
| |
commit. If the transaction is aborted, the original file is left unchanged. |
| |
|
| |
- 'peak.running.scheduler.UntwistedReactor' now supports a configuration |
| |
property ('peak.running.reactor.checkInterval') to determine how long it |
| |
should run 'select()' calls for, when there are no scheduled tasks. |
| |
|
| |
- 'peak.running.commands.AbstractCommand' now offers a '_run()' method that |
| |
can be overridden in subclasses, instead of 'run()'. If you override the |
| |
new '_run()' method instead, you get the advantage of automatic handling |
| |
for invocation errors and 'SystemExit' exceptions, provided for you by the |
| |
'run()' method. |
| |
|
| |
- There is now a 'storage.DMFor(class)' function that returns a configuration |
| |
key for registering or looking up data managers by class. You can use the |
| |
returned key in a binding's 'offerAs' list, or as the target of a 'bindTo()' |
| |
or 'lookupComponent()'. The key is constructed using |
| |
'config.ProviderOf(storage.IDataManager,class)'. |
| |
|
| |
- You can now register utilities that are keyed by the combination of an |
| |
interface and one or more classes, using 'config.ProviderOf(iface,*classes)' |
| |
as a configuration key. Providers are registered under an '(iface,klass)' |
| |
tuple for each specified class, and looked up using the MRO order of the |
| |
class specified for lookup. In other words, searching for a provider will |
| |
find a provider for the requested class, or one of its base classes, with |
| |
precedence given to the more-specific provider. This is primarily intended |
| |
for services like data managers and Specialists. |
| |
|
| |
- It's now possible to extend .ini file parsing with custom section types, |
| |
and PEAK defines its own built-in section types using this extension |
| |
mechanism. Custom section types must include at least one space, (e.g. |
| |
'[My Section]') or they will be treated as a plain property name. |
| |
See the 'peak.config.iniFile.sectionParsers' section in 'peak.ini' for |
| |
more details, along with the 'config.ISettingParser' and 'config.IIniParser' |
| |
interfaces. |
| |
|
| |
- When creating a 'PropertyName()', it's now possible to force conversion of |
| |
invalid characters to '_', using the 'PropertyName.fromString()' |
| |
constructor. (Note that the input must be a plain-ASCII string.) Unless |
| |
you request that wildcards ('?' and '*') be kept, they will also be |
| |
converted to '_' characters. This can be convenient for converting things |
| |
like filenames or text that might contain spaces, to property names. |
| |
|
| |
- It's now possible to declare an attribute as offering a wildcard property; |
| |
such lookups now follow the same rules as other wildcard property lookups. |
| |
The 'config.IConfigKey' interface has been changed to cleanly support |
| |
implied keys at both registration and lookup time, so you can implement |
| |
your own key types that work the way interfaces or property names do for |
| |
configuration lookups. |
| |
|
| |
- The 'EigenRegistry' class has been moved from 'peak.util.EigenData' to |
| |
'peak.config.registries', as it hasn't really been useful outside PEAK for |
| |
a while now. |
| |
|
| |
- .ini files now support "smart property" objects ('config.ISmartProperty'). |
| |
If a property rule defined in an .ini file evaluates at runtime to an object |
| |
that implements 'ISmartProperty', the object will be given a chance to |
| |
compute a value for the property, in place of being used itself. This helps |
| |
to simplify definition of complex property rules in .ini files, by allowing |
| |
the use of helper classes. Also, 'naming.LinkRef' and 'naming.Reference' |
| |
(indirectly) support this interface, so you can now use them in .ini files |
| |
to refer to an object via the naming system. (Previously, 'naming.LinkRef' |
| |
wouldn't do the right thing unless the property was looked up via a |
| |
'config:' URL, and 'naming.Reference' didn't exist.) |
| |
|
| |
- 'peak.util.imports.whenImported()' can now be used even when the specified |
| |
module has already been loaded. |
| |
|
| |
- The naming system no longer has 'objectFactories' and 'stateFactories' as |
| |
utilities; they have been replaced with new mechanisms involving adaptation. |
| |
Previously, addresses had a 'retrieve()' method that could be used to |
| |
retrieve the object defined by the address. Now, to retrieve an object for |
| |
an address, you must either define a context that processes the address, or |
| |
the address must have a 'defaultFactory' attribute, which provides a name |
| |
to be imported to get an 'IObjectFactory' that can construct the referenced |
| |
object. (This is simpler than it sounds; for URLs that reference |
| |
ManagedConnections, for example, all you need to do is provide the fully |
| |
qualified name of the connection class.) |
| |
|
| |
Meanwhile, writable naming contexts must have a 'serializationProtocol' |
| |
attribute, specifying what interface an object should be adapted to before |
| |
attempting to store it in that context. |
| |
|
| |
The naming system no longer processes the 'creationName' keyword argument; |
| |
this is now considered the sole responsibility of 'peak.binding'. The |
| |
'IComponent.lookupComponent()' method still accepts the keyword argument, |
| |
and attribute bindings still handle the creation name transparently. It is |
| |
just not available via naming system APIs, and naming contexts no longer |
| |
have to deal with it. |
| |
|
| |
The naming system base classes no longer use 'attrs' as an input parameter |
| |
or return value. If you've subclassed anything from 'peak.naming.contexts', |
| |
note that your '_get()' methods should now just return the lookup value, |
| |
rather than a 'state,attrs' tuple. For most naming contexts, this just |
| |
means you should change 'return foo, None' statements to just 'return foo'. |
| |
|
| |
- Property definition rules in an .ini file can now refer to 'rulePrefix' and |
| |
'ruleSuffix' variables. 'rulePrefix' is a "."-terminated string, |
| |
representing the name the rule was defined with. For example, if the |
| |
rule was defined for '"foo.bar.*"', then 'rulePrefix' will be '"foo.bar."' |
| |
|
| |
The 'ruleSuffix' will be the portion of the 'propertyName' that follows |
| |
'rulePrefix'. So, if looking up property '"foo.bar.baz"', then the |
| |
'"foo.bar.*"' rule will execute with a 'ruleSuffix' of '"baz"'. This should |
| |
make it easier to work with hierarchical property namespaces. |
| |
|
| |
- Added simple example scripts and small applications in the 'examples' |
| |
directory. |
| |
|
| |
- There is a new command-line namespace introspection tool, 'n2', which |
| |
can be accessed by running 'peak n2'. Type 'peak n2 -h' for help. |
| |
|
| |
- The PEAK_CONFIG environment variable can now list multiple files, separated |
| |
by the platform's 'os.pathsep' (e.g. ':' on Unix, ';' on Windows). |
| |
|
| |
- It's no longer necessary to provide a '_defaultState()' implementation |
| |
for an EntityDM: a default implementation is now supplied. |
| |
|
| |
- Added automatic installation of 'datetime' package for Python < 2.3. |
| |
|
| |
- CGI support has been moved from 'peak.running.zpublish' into |
| |
'peak.running.commands' (for "raw" CGI/FastCGI) and 'peak.web' (for the |
| |
PEAK high-level publishing framework). You can use 'peak CGI someName' to |
| |
adapt 'someName' to a 'running.IRerunnableCGI' and run it as a CGI/FastCGI. |
| |
|
| |
- There is now a 'peak.security' package, available from 'peak.api' as |
| |
'security'. It provides permission management functions: you can define |
| |
abstract permissions by subclassing 'security.Permission', then create |
| |
permission checking rules by subclassing 'security.RuleSet', and declare |
| |
the permissions needed to access attributes of a class with |
| |
'security.allow()'. The test suite demonstrates a complex application |
| |
ruleset with dynamic, data-driven permissions. |
| |
|
| |
- There is now an interface for "Active Descriptors": |
| |
'binding.IActiveDescriptor'. 'peak.binding' now uses this interface to |
| |
identify active descriptors, so you can now create your own. (Previously, |
| |
'peak.binding' used 'isinstance()' to detect active descriptors.) |
| |
|
| |
- REMOVED 'naming.ParsedURL'; it was deprecated as of 0.5 alpha 2. |
| |
|
| |
- The 'provides' keyword argument to various 'peak.binding' APIs has been |
| |
renamed to 'offerAs', and it must be a sequence of configuration keys. |
| |
(Previously, it accepted either a single key or a tuple of keys.) |
| |
The signature of 'binding.Constant()' was changed as well; the first |
| |
positional argument is now the constant value, and 'offerAs' is now a |
| |
keyword argument. (Previously, 'provides' was the first positional argument |
| |
of 'binding.Constant()'.) The 'registerProvider()' method of |
| |
'config.IConfigurable()' also now accepts only a single configuration key, |
| |
as does 'EigenRegistry.register()'. |
| |
|
| |
Also, all 'peak.binding' APIs now only accept positional parameters for |
| |
items unique to that API. Items common to multiple APIs (such as 'offerAs', |
| |
'doc', 'attrName', etc.) should now be supplied as keyword arguments. |
| |
|
| |
Bindings also now automatically "suggest" the containing object as a parent |
| |
component for the contained object, whenever a value is assigned to them or |
| |
computed. If a non-None 'adaptTo' is set on the binding, the value assigned |
| |
or computed will be adapted to the specified protocol before the parent |
| |
component is suggested. 'binding.New()' no longer relies on the |
| |
'IComponentFactory' interface, but instead uses the new adapt/suggest |
| |
mechanisms. |
| |
|
| |
Previously, parent components were only "suggested" when a binding was set |
| |
via component constructor keyword arguments. Now, this is done at any time |
| |
bindings are set, but *not* for non-binding keyword arguments. In other |
| |
words, ordinary attributes of a component do not receive "suggested parent" |
| |
notices, even when set via constructor keyword arguments. If you want an |
| |
attribute to do this, you must define the attribute with the binding API; |
| |
e.g. via 'requireBinding()' or 'binding.Constant()'. If you do *not* want |
| |
a binding to suggest a parent component, use 'suggestParent=False' in the |
| |
binding definition. |
| |
|
| |
Corrected Problems |
| |
|
| |
- 'peak.running.commands.CGICommand' could become confused on certain BSD |
| |
variants (such as Mac OS/X), and assume it was running under FastCGI, even |
| |
if it wasn't. (Because the operating systems in question use socket pairs |
| |
to implement pipes.) |
| |
|
| |
- Fixed some problems with the test suite when running under Python 2.3. |
| |
PEAK itself worked fine, but the test suite was bitten by two minor |
| |
semantic changes that took effect in 2.3, resulting in lots of error |
| |
messages about ModuleType needing a parameter, and a test failure for |
| |
'checkClassInfo' in the 'FrameInfoTest' test class. |
| |
|
| |
- Transaction participants that raised an error in their 'abortTransaction()' |
| |
method, would not receive a 'finishTransaction()' call, the error was |
| |
passed through to the transaction service's caller, and later participants |
| |
might not have received an 'abortTransaction()' message either. |
| |
|
| |
- SQL connections didn't close their cursors before aborting a transaction |
| |
|
| |
- The logging system would raise an error if a log message with no arguments |
| |
contained a '%' sign. |
| |
|
| |
- There was a typo in peak.naming.arithmetic that caused homogeneous non-URL |
| |
name subtraction to fail. |
| |
|
| |
- The default reactor supplied in 'peak.running.scheduler' would consume |
| |
CPU continuously if it was waiting for I/O and no tasks were scheduled. |
| |
|
| |
- The 'peak.util.imports.whenImported' function didn't work. |
| |
|
| |
|
| |
|
| |
|
| Fixes and Enhancements since Version 0.5 alpha 1 |
Fixes and Enhancements since Version 0.5 alpha 1 |
| |
|
| Changed, Enhanced, or Newly Deprecated Features |
Changed, Enhanced, or Newly Deprecated Features |
| |
|
| |
- Added a 'shellcmd:' URL scheme that returns a function that calls |
| |
'os.system()' on the body of the URL. It's intended for use as a command |
| |
factory, as is needed by the 'URLChecker' periodic task. |
| |
|
| |
- You can now define adapters from arbitrary types to 'binding.IBindingNode', |
| |
and thus be able to use them as part of a component hierarchy - without |
| |
needing to directly add 'getParentComponent()' or 'getComponentName()' |
| |
methods to them. |
| |
|
| |
- Added experimental 'invoke.c' script for POSIX-ish platforms with funky |
| |
'#!' support, or lack thereof. |
| |
|
| |
'invoke' is designed to be used like this:: |
| |
|
| |
#!/usr/local/bin/invoke peak somearg otherarg... |
| |
|
| |
This should work on most sane platforms with a long-enough commandline. |
| |
(See "this page":http://homepages.cwi.nl/~aeb/std/hashexclam-1.html for |
| |
details on the insanely incompatible ways different Unixes interpret '#!' |
| |
lines.) |
| |
|
| |
The script is not currently built or installed by setup.py. On the |
| |
platforms it's targeted at, you should be able to build it with:: |
| |
|
| |
gcc -o invoke invoke.c |
| |
|
| |
(Yes, it really is that simple of a script.) |
| |
|
| |
- Added a ZConfig schema for 'running.commands.EventDriven' applications, |
| |
a ZConfig component definition for adaptive tasks, and a running shortcut |
| |
called 'EventDriven'. |
| |
|
| |
It should now be possible to do this:: |
| |
|
| |
#!/usr/bin/env peak EventDriven |
| |
|
| |
at the top of a ZConfig file formatted according to the new schema, and |
| |
have it run. There are two periodic tasks that can be configured and |
| |
run from such a file: 'CleanupFiles' and 'URLChecker'. 'CleanupFiles' will |
| |
delete files matching a pattern that are older than a certain age, while |
| |
'URLChecker' will check to see if the target of a naming system URL is |
| |
up/available/working, and if not, runs a command to restart it. As an |
| |
amusing demo, try specifying a 'file:' URL with a 'shellcmd:touch theFile' |
| |
to recreate the file, then add a 'CleanupFiles' that deletes the file the |
| |
checker looks for. This can be hours (well, minutes) of exciting fun as you |
| |
watch the dueling daemons undoing each others' work. |
| |
|
| |
- Added 'zconfig.schema' URL scheme that loads an enhanced ZConfig schema |
| |
object that can act as a command line interpreter using the 'peak' script. |
| |
|
| |
To use it, run 'peak zconfig.schema:urlToSchema urlOfConfig'. Or, add |
| |
a line like this:: |
| |
|
| |
#!/usr/bin/env peak zconfig.schema:pkgfile:some.package/schema.xml |
| |
|
| |
to the top of a configuration file, and make the configuration file |
| |
executable. Note that the schema specified must convert to an object |
| |
that's usable with the commands bootstrap framework. Also note that |
| |
if you have a local PEAK_CONFIG file, you can add a 'peak.running.shortcuts' |
| |
entry to shorten the URL reference in your #! line. E.g.:: |
| |
|
| |
#!/usr/bin/env peak mySchema |
| |
|
| |
will suffice if you have defined 'peak.running.shortcuts.mySchema' as |
| |
'naming.LinkRef("zconfig.schema:pkgfile:some.package/schema.xml")'. |
| |
|
| |
There is also a 'peak ZConfig urlOfSchema urlOfConfig' variant, that was |
| |
added to support putting '#!/usr/bin/env peak ZConfig' at the top of |
| |
schema files, but unfortunately that's not valid XML. |
| |
|
| - Standardized file-based URL syntaxes (e.g logfiles and lockfiles) to |
- Standardized file-based URL syntaxes (e.g logfiles and lockfiles) to |
| follow RFC 1738/2396, and Python 'urllib'. This shouldn't affect much |
follow RFC 1738/2396, and Python 'urllib'. This shouldn't affect much |
| besides the canonical forms of the URLs. Added 'pkgfile:some.pkg/filepath' |
besides the canonical forms of the URLs. Added 'pkgfile:some.pkg/filepath' |
| |
|
| - Added support in the mof2py code generator for "unprefixing" enumerated |
- Added support in the mof2py code generator for "unprefixing" enumerated |
| values, so that UML and other metamodels' enumerations work correctly |
values, so that UML and other metamodels' enumerations work correctly |
| when loading from XMI. |
when loading from XMI. Also, mof2py no longer emits 'config.setupModule()' |
| |
calls in generated code, as in practice they are not needed. |
| |
|
| |
- Running 'peak test' from the command line is roughly equivalent to running |
| |
'unittest.py', except that the test suite defaults to the PEAK test suite. |
| |
You can, however run any test suite from the command line with a dotted |
| |
module/attribute path, e.g 'peak test foo.bar.test_suite'. |
| |
|
| - 'binding.Acquire()' now accepts a 'default' value argument, and |
- 'binding.Acquire()' now accepts a 'default' value argument, and |
| 'binding.New()' no longer accepts the 'bindToOwner' flag. |
'binding.New()' no longer accepts the 'bindToOwner' flag. |
| about this, as they are part of the naming package's extensibility |
about this, as they are part of the naming package's extensibility |
| framework.) |
framework.) |
| |
|
| - 'EigenRegistry' and 'PropertyMap' no longer attempt to figure out whether |
|
| implied (i.e. inherited) interfaces are more or less general with respect |
|
| to a previous registration. This was behavior that emulated Zope adapter |
|
| registries, but what we really wanted was more akin to a Zope "type" |
|
| registry. The only parts of the test suite that used the old behavior |
|
| were the tests specifically written to ensure that behavior! |
|
| |
|
| - 'binding.bindTo()' now accepts a 'default=' argument, whose value will be |
- 'binding.bindTo()' now accepts a 'default=' argument, whose value will be |
| used in case of a 'NameNotFound' error. |
used in case of a 'NameNotFound' error. |
| |
|
| |
|
| Corrected Problems |
Corrected Problems |
| |
|
| |
- Fixed a problem in ZConfig 'schema.dtd'; I used 'PCDATA' where I should've |
| |
used 'CDATA'. |
| |
|
| |
- Fixed a problem with 'binding.supertype()' not working correctly if the MRO |
| |
it was searching contained a "classic" class. Now 'supertype()' skips any |
| |
classic classes it finds. (It probably should be rewritten entirely.) |
| |
|
| |
- Fixed misc. problems with 'fromZConfig()' component constructor |
| |
|
| - Fixed source distributions missing essential setup files |
- Fixed source distributions missing essential setup files |
| |
|
| - Fixed a problem with assembly events, where a parent component that didn't |
- Fixed a problem with assembly events, where a parent component that didn't |
| if they requested the notification after the parent had already received |
if they requested the notification after the parent had already received |
| it. |
it. |
| |
|
| |
- Fixed a bug in automatic metaclass generation that caused extra unneeded |
| |
metaclasses to be generated. |
| |
|
| - Fixed 'naming.lookup()' and related APIs not setting the parent component |
- Fixed 'naming.lookup()' and related APIs not setting the parent component |
| of created objects without an explicitly supplied 'creationParent' keyword |
of created objects without an explicitly supplied 'creationParent' keyword |
| argument. This used to "sort of work" when we had implicit configuration |
argument. This used to "sort of work" when we had implicit configuration |
Diff of /PEAK/CHANGES.txt
Parent Directory
| 
Revision Log