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Fixes and Enhancements since Version 0.5 alpha 2 |
| |
|
| |
Changed, Enhanced, or Newly Deprecated Features |
| |
|
| |
- 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. |
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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. |
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|
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- 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.). |
| |
|
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- 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. |
| |
|
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- DEPRECATED the 'config.PropertySet' class; please convert to using |
| |
'config.Namespace', as it will disappear in the 0.5alpha4 release cycle. |
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|
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- 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. |
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|
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- 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: |
| |
|
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'requireBinding("info")' -- use 'Require("info")' |
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|
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'delegateTo("attr")' -- use 'Delegate("attr")' |
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|
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'New(type)' -- use 'Make(type)' |
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|
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'New("module.type")' -- use 'Make("module.type")' |
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|
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'bindTo(key)' -- use 'Obtain(key)' |
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|
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'Constant(value)' -- use 'Make(lambda: value)' |
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|
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'Acquire(key)' -- use 'Obtain(key, offerAs=[key])' |
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|
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'Copy(value)' -- use 'Make(lambda: <expr to copy value>)' |
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|
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'whenAssembled(func)' -- use 'Make(func, uponAssembly=True)' |
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|
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'bindSequence(key1,key2,...)' -- use 'Obtain([key1,key,...])' |
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|
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'bindToProperty(x,y)' -- use 'Obtain(PropertyName(x),default=y)' |
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|
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'bindToParent()' -- use 'Obtain("..")' |
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|
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'bindToSelf()' -- use 'Obtain(".")' |
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|
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'bindToUtilities()' -- no replacement; let me know if you're using this. |
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|
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Note that 'Make' and 'Obtain' also support sequences of recipes and keys, |
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and in those cases will produce a sequence of the results from those recipes |
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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. |
| |
|
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Also, note that the 'activateUponAssembly' keyword is now 'uponAssembly', |
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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. |
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Last, but not least, a 'binding.IRecipe' interface was added, to support the |
| |
new 'binding.Make' type. |
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|
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|
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- Added a 'lockName' attribute to 'runnning.AdaptiveTask', and a 'LockURL' |
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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. |
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|
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- 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 |
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makes 'bindSequence()' obsolete, so 'bindSequence()' is now DEPRECATED. |
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'binding.bindSequence(key1,key2,...)' can now be replaced with |
| |
'binding.Obtain([key1,key,...])', and will produce the same results. |
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|
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- '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!) |
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|
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- 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.running.tools.version' package. |
| |
(Error handling and documentation, alas, are still minimal.) |
| |
|
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- 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', |
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similar to command aliases in many shells. |
| |
|
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- '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. |
| |
|
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- The 'lookup()' method of 'binding.IComponentKey' is now called |
| |
'findComponent()', to better distinguish it from 'lookup()' in |
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'naming.IBasicContext', which does something very different. |
| |
|
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- 'binding.Obtain()' (formerly 'binding.bindTo()' and 'binding.bindSequence()') |
| |
now pre-adapt their arguments to 'IComponentKey', to speed 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. |
| |
|
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- 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. |
| |
|
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- '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. |
| |
|
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- 'peak.running.scheduler.UntwistedReactor' now supports using a "signal |
| |
manager" component (via the 'peak.running.signalManager' property) to |
| |
process signals while a 'run()' loop is in progress. Signal managers can |
| |
also be added or removed at any time via the new 'peak.util.signal_stack' |
| |
module. |
| |
|
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- '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. |
| |
|
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- 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. |
| |
|
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- 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. |
| |
|
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- .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 |
| |
|
| |
- 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 |
| methods to them. |
methods to them. |
| |
|
| - Added experimental 'invoke.c' script for POSIX-ish platforms with funky |
- Added experimental 'invoke.c' script for POSIX-ish platforms with funky |
| '#!' support, or lack thereof. 'invoke' is designed to be used like this:: |
'#!' support, or lack thereof. |
| |
|
| |
'invoke' is designed to be used like this:: |
| |
|
| #!/usr/local/bin/invoke peak somearg otherarg... |
#!/usr/local/bin/invoke peak somearg otherarg... |
| |
|
| This should work on most sane platforms with a long-enough commandline. |
This should work on most sane platforms with a long-enough commandline. |
| (See http://homepages.cwi.nl/~aeb/std/hashexclam-1.html for details on the |
(See "this page":http://homepages.cwi.nl/~aeb/std/hashexclam-1.html for |
| insanely incompatible ways different Unixes interpret #! lines.) |
details on the insanely incompatible ways different Unixes interpret '#!' |
| |
lines.) |
| |
|
| The script is not currently built or installed by setup.py. On the |
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:: |
platforms it's targeted at, you should be able to build it with:: |
| |
|
| - Added a ZConfig schema for 'running.commands.EventDriven' applications, |
- Added a ZConfig schema for 'running.commands.EventDriven' applications, |
| a ZConfig component definition for adaptive tasks, and a running shortcut |
a ZConfig component definition for adaptive tasks, and a running shortcut |
| called 'EventDriven'. It should now be possible to do this:: |
called 'EventDriven'. |
| |
|
| |
It should now be possible to do this:: |
| |
|
| #!/usr/bin/env peak EventDriven |
#!/usr/bin/env peak EventDriven |
| |
|
| |
|
| - Added 'zconfig.schema' URL scheme that loads an enhanced ZConfig schema |
- Added 'zconfig.schema' URL scheme that loads an enhanced ZConfig schema |
| object that can act as a command line interpreter using the 'peak' script. |
object that can act as a command line interpreter using the 'peak' script. |
| |
|
| To use it, run 'peak zconfig.schema:urlToSchema urlOfConfig'. Or, add |
To use it, run 'peak zconfig.schema:urlToSchema urlOfConfig'. Or, add |
| a line like this:: |
a line like this:: |
| |
|
Diff of /PEAK/CHANGES.txt
Parent Directory
| 
Revision Log