Commit 361639ef authored by eric pellegrini's avatar eric pellegrini

Merge branch 'hotfix-1.0.3.a'

parents a95b2c6e fc62b1bc
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Copyright (c) since 2006, Oliver Schoenborn
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
1. Redistributions of source code must retain the above copyright notice, this
list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright notice,
this list of conditions and the following disclaimer in the documentation
and/or other materials provided with the distribution.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
For PyPubSub v3.3.0
^^^^^^^^^^^^^^^^^^^^^
* cleanup low-level API: exception classes, moved some out of pub module that did not
belong there (clutter), move couple modules,
* completed the reference documentation
* support installation via pip
* follow some guidelines in some PEPs such as PEP 396 and PEP 8
* support Python 2.6, 2.7, and 3.2 to 3.4a4 but drop support for Python <= 2.5
For PyPubSub v3.2.0
^^^^^^^^^^^^^^^^^^^
This is a minor release for small improvements made (see docs/CHANGELOG.txt)
based on feedback from user community. In particular an XML reader for
topic specification contributed by Josh English. Also cleaned up the
documentation, updated the examples folder (available in source distribution
as well as `online`_).
.. _online: https://sourceforge.net/p/pubsub/code/HEAD/tree/
Only 3 changes to API (function names):
* renamed pub.getDefaultRootAllTopics to pub.getDefaultTopicTreeRoot
* removed pub.importTopicTree: use pub.addTopicDefnProvider(source, format)
* renamed pub.exportTopicTree to pub.exportTopicTreeSpec
Oliver Schoenborn
September 2013
PyPubSub 3.1.2
^^^^^^^^^^^^^^^^
This is a minor release for small improvements made (see docs/CHANGELOG.txt)
based on feedback from user community. Also extended the documentation. See
pubsub.sourceforge.net for installation and usage. See the examples folder for
some useful examples.
Oliver Schoenborn
Nov 2011
PyPubSub 3.1.1b1
^^^^^^^^^^^^^^^^^^
Docs updated.
Oliver Schoenborn
May 2010
For PyPubSub v3.1.0b1
^^^^^^^^^^^^^^^^^^^^^^
Major cleanup of the API since 3.0 and better support
for the legacy wxPython code. Defining a topic tree
via a text file has been improved drastically, making it
simpler to document topic messages and payload data
required or optional. More examples have been added,
and the messaging protocols clarified.
The included docs are not yet updated, that's what I'm
working on now and will lead to the 3.1.1b1 release.
I'm also working on an add-on module that would allow
two applications to communicate over the network using
pubsub-type messaging (with topics, etc). The design
is almost complete.
Oliver Schoenborn
Jan 2010
\ No newline at end of file
'''
Publish-subscribe package.
"""
Pubsub package initialization.
This package provides the following modules:
:copyright: Copyright since 2006 by Oliver Schoenborn, all rights reserved.
:license: BSD, see LICENSE_BSD_Simple.txt for details.
"""
- pub: "entry point" module for core pubsub functionality. It provides
functions for sending messages and subscribing listeners and various
others.
- utils: subpackage of utility functions and classes for debugging
messages, handling exceptions raised in listeners, and more.
- setupv1: (deprecated) module to force pubsub to use the old,
"version 1" (aka v1) API (should only be useful to wxPython users
for legacy code).
- setuparg1: module to setup pubsub to use "arg1" messaging protocol
- setupkwargs: module to setup pubsub to use "kwargs" messaging protocol
For instance::
from pubsub import pub
pub.sendMessage('topic', data1=123)
:copyright: Copyright 2006-2009 by Oliver Schoenborn, all rights reserved.
:license: BSD, see LICENSE.txt for details.
Last known commit:
- $Date: 2010-02-13 08:57:21 -0500 (Sat, 13 Feb 2010) $
- $Revision: 249 $
'''
_PREVIOUS_RELEASE_DATE = "2013-09-15"
_PREVIOUS_RELEASE_VER = "3.2.1b"
__version__ = "3.3.0"
__all__ = [
'pub', 'utils',
'printImported', 'setupkwargs', 'setuparg1', 'setupv1',
'pub',
'utils',
'setupkwargs',
'setuparg1',
'__version__'
]
# set our module search path in globalsettings so setup*.py modules
# can find and modify
from MDANSE.Externals.pubsub import pubsubconf
pubsubconf.setPubsubInfo(__path__, globals())
#del pubsubconf # prevent circular ref
def printImported():
'''Output a list of pubsub modules imported so far'''
import sys
ll = [mod for mod in sys.modules.keys() if mod.find('pubsub') >= 0]
ll.sort()
print '\n'.join(ll)
def _tryAutoSetupV1():
'''This function is called automatically when the pubsub module is
imported. It determines if the legacy "version 1" API of pubsub should
be used automatically, by looking for a module called 'autosetuppubsubv1'
on the module's search path. If this module is found, setupv1 is imported,
so your application will get v1 API just by doing "from pubsub import ...".
If that module is not found then nothing happens and the function
returns; your application will get the "default" API unless you
explicitly choose a different one. Note that autosetuppubsubv1 is never
actually imported, just searched. '''
try:
# if autosetupv1 is importable, then it means we should
# automatically setup for version 1 API
import imp
imp.find_module('autosetuppubsubv1', __path__)
except ImportError:
pass
else:
from MDANSE.Externals.pubsub import setupv1
assert pub is not None
assert Publisher is pub.Publisher
_tryAutoSetupV1()
'''
Core package of pubsub, holding the publisher, listener, and topic
object modules. Functions defined here are used internally by
pubsub so that the right modules can be found later, based on the
selected messaging protocol.
Indeed some of the API depends on the messaging
protocol used. For instance sendMessage(), defined in publisher.py,
has a different signature (and hence implementation) for the kwargs
protocol than for the arg1 protocol.
The most convenient way to
support this is to put the parts of the package that differ based
on protocol in separate folders, and add one of those folders to
the package's __path__ variable (defined automatically by the Python
interpreter when __init__.py is executed). For instance, code
specific to the kwargs protocol goes in the kwargs folder, and code
specific to the arg1 protocol in the arg1 folder. Then when doing
"from pubsub.core import listener", the correct listener.py will be
found for the specified protocol. The default protocol is kwargs.
Only one protocol can be used in an application. The default protocol,
if none is chosen by user, is kwargs, as selected by the call to
_prependModulePath() at end of this file.
:copyright: Copyright 2006-2009 by Oliver Schoenborn, all rights reserved.
:license: BSD, see LICENSE.txt for details.
'''
from MDANSE.Externals.pubsub.core import policies
def setMsgProtocol(protocol):
policies.msgDataProtocol = protocol
# add appropriate subdir for protocol-specific implementation
if protocol == 'kwargs':
_replaceModulePath0('kwargs')
else:
_replaceModulePath0('arg1')
def setMsgDataArgName(stage, listenerArgName, senderArgNameAny=False):
policies.senderKwargNameAny = senderArgNameAny
policies.msgDataArgName = listenerArgName
policies.msgProtocolTransStage = stage
#print `policies.msgProtocolTransStage`, `policies.msgDataProtocol`, \
# `policies.senderKwargNameAny`, `policies.msgDataArgName`
#print 'override "arg1" protocol arg name:', argName
def _replaceModulePath0(dirname):
'''Replace the first package-path item (in __path__) with dirname.
The dirname will be prepended with the package's path, assumed to
be the last item in __path__.'''
corepath = __path__
assert len(corepath) > 1
initpyLoc = corepath[-1]
import os
corepath[0] = os.path.join(initpyLoc, dirname)
def _prependModulePath(extra):
'''Insert extra at beginning of package's path list. Should only be
called once, at package load time, to set the folder used for
implementation specific to the default message protocol.'''
corepath = __path__
initpyLoc = corepath[-1]
import os
corepath.insert(0, os.path.join(initpyLoc, extra))
# default protocol:
_prependModulePath('kwargs')
"""
Core package of pubsub, holding the publisher, listener, and topic
object modules. Functions defined here are used internally by
pubsub so that the right modules can be found later, based on the
selected messaging protocol.
Indeed some of the API depends on the messaging
protocol used. For instance sendMessage(), defined in publisher.py,
has a different signature (and hence implementation) for the kwargs
protocol than for the arg1 protocol.
The most convenient way to
support this is to put the parts of the package that differ based
on protocol in separate folder, and add one of those folders to
the package's __path__ variable (defined automatically by the Python
interpreter when __init__.py is executed). For instance, code
specific to the kwargs protocol goes in the kwargs folder, and code
specific to the arg1 protocol in the arg1 folder. Then when doing
"from pubsub.core import listener", the correct listener.py will be
found for the specified protocol. The default protocol is kwargs.
Only one protocol can be used in an application. The default protocol,
if none is chosen by user, is kwargs, as selected by the call to
_prependModulePath() at end of this file.
:copyright: Copyright since 2006 by Oliver Schoenborn, all rights reserved.
:license: BSD, see LICENSE_BSD_Simple.txt for details.
"""
def _prependModulePath(extra):
"""Insert extra at beginning of package's path list. Should only be
called once, at package load time, to set the folder used for
implementation specific to the default message protocol."""
corepath = __path__
initpyLoc = corepath[-1]
import os
corepath.insert(0, os.path.join(initpyLoc, extra))
# add appropriate subdir for protocol-specific implementation
from .. import policies
_prependModulePath(policies.msgDataProtocol)
from .publisher import Publisher
from .callables import (
AUTO_TOPIC,
)
from .listener import (
Listener,
getID as getListenerID,
ListenerMismatchError,
IListenerExcHandler,
)
from .topicobj import (
Topic,
SenderMissingReqdMsgDataError,
SenderUnknownMsgDataError,
MessageDataSpecError,
TopicDefnError,
ExcHandlerError,
)
from .topicmgr import (
TopicManager,
TopicDefnError,
TopicNameError,
ALL_TOPICS,
)
from .topicdefnprovider import (
ITopicDefnProvider,
TopicDefnProvider,
ITopicDefnDeserializer,
UnrecognizedSourceFormatError,
exportTopicTreeSpec,
TOPIC_TREE_FROM_MODULE,
TOPIC_TREE_FROM_STRING,
TOPIC_TREE_FROM_CLASS,
)
from .topictreetraverser import (
TopicTreeTraverser,
)
from .notificationmgr import (
INotificationHandler,
)
\ No newline at end of file
'''
This is not really a package init file, it is only here to simplify the
packaging and installation of pubsub.core's protocol-specific subfolders
by setuptools. The python modules in this folder are automatically made
part of pubsub.core via pubsub.core's __path__. Hence, this should not
be imported directly, it is part of pubsub.core when the messaging
protocol is "arg1" (and not usable otherwise).
:copyright: Copyright 2006-2009 by Oliver Schoenborn, all rights reserved.
:license: BSD, see LICENSE.txt for details.
'''
msg = 'Should not import this directly, used by pubsub.core if applicable'
"""
This is not really a package init file, it is only here to simplify the
packaging and installation of pubsub.core's protocol-specific subfolders
by setuptools. The python modules in this folder are automatically made
part of pubsub.core via pubsub.core's __path__. Hence, this should not
be imported directly, it is part of pubsub.core when the messaging
protocol is "arg1" (and not usable otherwise).
:copyright: Copyright since 2006 by Oliver Schoenborn, all rights reserved.
:license: BSD, see LICENSE_BSD_Simple.txt for details.
"""
msg = 'Should not import this directly, used by pubsub.core if applicable'
raise RuntimeError(msg)
\ No newline at end of file
'''
:copyright: Copyright 2006-2009 by Oliver Schoenborn, all rights reserved.
:license: BSD, see LICENSE.txt for details.
'''
from MDANSE.Externals.pubsub.core.listenerbase import ListenerBase, ValidatorBase, ListenerInadequate
from MDANSE.Externals.pubsub.core.callables import ListenerInadequate
from MDANSE.Externals.pubsub.core import policies
class Message:
"""
A simple container object for the two components of a topic messages
in the pubsub API v1: the
topic and the user data. An instance of Message is given to your
listener when called by sendMessage(topic). The data is accessed
via the 'data' attribute, and can be type of object.
"""
def __init__(self, topicNameTuple, data):
self.topic = topicNameTuple
self.data = data
def __str__(self):
return '[Topic: '+`self.topic`+', Data: '+`self.data`+']'
class Listener(ListenerBase):
def __call__(self, actualTopic, data):
'''Call the listener with data. Note that it raises RuntimeError
if listener is dead. Should always return True (False would require
the callable_ be dead but self hasn't yet been notified of it...).'''
kwargs = {}
if self._autoTopicArgName is not None:
kwargs[self._autoTopicArgName] = actualTopic
cb = self._callable()
if cb is None:
self._calledWhenDead()
msg = Message(actualTopic.getNameTuple(), data)
cb(msg, **kwargs)
return True
class ListenerValidator(ValidatorBase):
'''
Accept one arg or *args; accept any **kwarg,
and require that the Listener have at least all the kwargs (can
have extra) of Topic.
'''
def _validateArgs(self, listener, paramsInfo):
# accept **kwargs
# accept *args
# accept any keyword args
if (paramsInfo.getAllArgs() == ()) and paramsInfo.acceptsAllUnnamedArgs:
return
if paramsInfo.getAllArgs() == ():
msg = 'Must have at least one parameter (any name, with or without default value, or *arg)'
raise ListenerInadequate(msg, listener, [])
assert paramsInfo.getAllArgs()
#assert not paramsInfo.acceptsAllUnnamedArgs
# verify at most one required arg
numReqdArgs = paramsInfo.numRequired
if numReqdArgs > 1:
allReqd = paramsInfo.getRequiredArgs()
msg = 'only one of %s can be a required agument' % (allReqd,)
raise ListenerInadequate(msg, listener, allReqd)
# if no required args but listener has *args, then we
# don't care about anything else:
if numReqdArgs == 0 and paramsInfo.acceptsAllUnnamedArgs:
return
# if no policy set, any name ok; otherwise validate name:
needArgName = policies.msgDataArgName
firstArgName = paramsInfo.allParams[0]
if (needArgName is not None) and firstArgName != needArgName:
msg = 'listener arg name must be "%s" (is "%s")' % (needArgName, firstArgName)
effTopicArgs = [needArgName]
raise ListenerInadequate(msg, listener, effTopicArgs)
"""
:copyright: Copyright since 2006 by Oliver Schoenborn, all rights reserved.
:license: BSD, see LICENSE_BSD_Simple.txt for details.
"""
from .listenerbase import (ListenerBase, ValidatorBase)
from .callables import ListenerMismatchError
from .. import policies
class Message:
"""
A simple container object for the two components of a topic messages
in the pubsub legacy API: the
topic and the user data. An instance of Message is given to your
listener when called by sendMessage(topic). The data is accessed
via the 'data' attribute, and can be type of object.
"""
def __init__(self, topicNameTuple, data):
self.topic = topicNameTuple
self.data = data
def __str__(self):
return '[Topic: '+repr(self.topic)+', Data: '+repr(self.data)+']'
class Listener(ListenerBase):
"""
Wraps a callable so it can be stored by weak reference and introspected
to verify that it adheres to a topic's MDS.
A Listener instance has the same hash value as the callable that it wraps.
A callable will be given data when a message is sent to it. In the arg1
protocol only one object can be sent via sendMessage, it is put in a
Message object in its "data" field, the listener receives the Message
object.
"""
def __call__(self, actualTopic, data):
"""Call the listener with data. Note that it raises RuntimeError
if listener is dead. Should always return True (False would require
the callable_ be dead but self hasn't yet been notified of it...)."""
kwargs = {}
if self._autoTopicArgName is not None:
kwargs[self._autoTopicArgName] = actualTopic
cb = self._callable()
if cb is None:
self._calledWhenDead()
msg = Message(actualTopic.getNameTuple(), data)
cb(msg, **kwargs)
return True
class ListenerValidator(ValidatorBase):
"""
Accept one arg or *args; accept any **kwarg,
and require that the Listener have at least all the kwargs (can
have extra) of Topic.
"""
def _validateArgs(self, listener, paramsInfo):
# accept **kwargs
# accept *args
# accept any keyword args
if (paramsInfo.getAllArgs() == ()) and paramsInfo.acceptsAllUnnamedArgs:
return
if paramsInfo.getAllArgs() == ():
msg = 'Must have at least one parameter (any name, with or without default value, or *arg)'
raise ListenerMismatchError(msg, listener, [])
assert paramsInfo.getAllArgs()
#assert not paramsInfo.acceptsAllUnnamedArgs
# verify at most one required arg
numReqdArgs = paramsInfo.numRequired
if numReqdArgs > 1:
allReqd = paramsInfo.getRequiredArgs()
msg = 'only one of %s can be a required agument' % (allReqd,)
raise ListenerMismatchError(msg, listener, allReqd)
# if no required args but listener has *args, then we
# don't care about anything else:
if numReqdArgs == 0 and paramsInfo.acceptsAllUnnamedArgs:
return
# if no policy set, any name ok; otherwise validate name:
needArgName = policies.msgDataArgName
firstArgName = paramsInfo.allParams[0]
if (needArgName is not None) and firstArgName != needArgName:
msg = 'listener arg name must be "%s" (is "%s")' % (needArgName, firstArgName)
effTopicArgs = [needArgName]
raise ListenerMismatchError(msg, listener, effTopicArgs)
'''
"""
Mixin for publishing messages to a topic's listeners. This will be
mixed into topicobj.Topic so that a user can use a Topic object to
send a message to the topic's listeners via a publish() method.
:copyright: Copyright 2006-2009 by Oliver Schoenborn, all rights reserved.
:license: BSD, see LICENSE.txt for details.
:copyright: Copyright since 2006 by Oliver Schoenborn, all rights reserved.
:license: BSD, see LICENSE_BSD_Simple.txt for details.
"""
'''
from MDANSE.Externals.pubsub.core.publisherbase import PublisherBase
from .publisherbase import PublisherBase
class Publisher(PublisherBase):
'''
"""
Publisher that allows old-style Message.data messages to be sent
to listeners. Listeners take one arg (required, unless there is an
*arg), but can have kwargs (since they have default values).
'''
"""
def sendMessage(self, topicName, data=None):
'''Send message of type topicName to all subscribed listeners,
"""Send message of type topicName to all subscribed listeners,
with message data. If topicName is a subtopic, listeners
of topics more general will also get the message.
Note that any listener that lets a raised exception escape will
interrupt the send operation, unless an exception handler was
specified via pub.setListenerExcHandler().
'''
"""
topicMgr = self.getTopicMgr()
topicObj = topicMgr.getOrCreateTopic(topicName)