Ideenklau erwünscht: Konzepte aus der Zope-Welt

Transcript

1. Ideenklau erwünscht:
   Konzepte aus der Zope-Welt
   Wolfgang Schnerring
   gmbh & co. kg
   PyCon DE 2011, Leipzig
   Wolfgang Schnerring Zope-Ideen 06.10.2011 1 / 39
   

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2. Einführung
   1996 Z Object Publishing Environment:
   Application-Server als
   CGI-Alternative
   2001 Plone CMS
   2004 Rewrite: Zope 3
   2009 Zope Toolkit
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3. Agenda
   1 Traversal
   2 Erweiterbarkeit
   3 Zope Component Architecture
   4 Model-based Security
   5 Transaktionen
   6 Test-Setup
   7 Testbrowser
   http://www.sxc.hu/photo/1149105 by nkzs
   Wolfgang Schnerring Zope-Ideen 06.10.2011 3 / 39
   

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5. Traversal
   Routing
   /users/edit/14
   /users/edit/joe@example.org
   /users/joe@example.org/edit
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6. Traversal
   Routing
   /users/edit/14
   /users/edit/joe@example.org
   /users/joe@example.org/edit
   /users/{email}/edit → edit_user(email)
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7. Traversal
   Traversal
   / users / joe@example.org / edit
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8. Traversal
   Traversal
   / users / joe@example.org / edit
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10. Erweiterbarkeit
    Zusätzliche Views
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11. Erweiterbarkeit
    Zusätzliche Daten
    # package1
    class User(persistent.Persistent):
    pass
    user.firstname = ’Alice’
    user.lastname = ’Random’
    user.email = ’alice@example.org’
    # package2
    annotations = zope.annotation.interfaces.IAnnotations(user)
    annotations[’credit_card_ref’] = ’1234XAB’
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13. Zope Component Architecture
    Adapter-Pattern
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14. Zope Component Architecture
    Zusätzliche Operationen
    # package1
    class User:
    # [...]
    # package2
    class CreditCardHolder:
    adapts(User)
    implements(CreditCard)
    # client code
    CreditCard(user).add(’1234XAB’)
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15. Zope Component Architecture
    Single Dispatch
    class Shape:
    def draw(self):
    raise NotImplementedError()
    class Circle(Shape):
    def draw(self):
    # [...]
    class Square(Shape):
    def draw(self):
    # [...]
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16. Zope Component Architecture
    Multiple Dispatch
    class SVGCircle:
    adapts(Circle, SVGCanvas)
    implements(Drawable)
    class JPGCircle:
    adapts(Circle, JPGCanvas)
    implements(Drawable)
    # client code
    Drawable(shape, canvas).draw()
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17. Zope Component Architecture
    Beispiel: Views
    # client code
    EditForm(user, request).render()
    class HTMLEditForm:
    adapts(User, HTTPRequest)
    implements(EditForm)
    class JSONEditForm:
    adapts(User, JSONRequest)
    implements(EditForm)
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18. Zope Component Architecture
    Zusätzliche Views
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19. Zope Component Architecture
    Beispiel: Traversal
    # /users/joe@example.org/edit
    class UserFolderTraverser:
    adapts(UserFolder)
    implements(zope.traversing.interfaces.ITraversable)
    def __init__(self, context, request):
    self.context = context
    self.request = request
    def traverse(self, name, remaining):
    return self.context.find_user_by_email(name)
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20. Zope Component Architecture
    Beispiel: Events
    zope.event.notify(ObjectCreatedEvent(user))
    # client code
    @subscribe(User, ObjectCreatedEvent)
    def send_welcome_email(user, event):
    # [...]
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22. Model-based Security
    view-based
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23. Model-based Security
    view-based
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24. Model-based Security
    model-based
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25. Model-based Security
    API
    zope.security.checker.defineChecker(class_, checker)
    proxied = zope.security.checker.ProxyFactory(object)
    class Checker(object):
    def check_getattr(self, object, name):
    def check_setattr(self, object, name):
    # permission = [...]
    getInteraction().checkPermission(permission, object)
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26. Model-based Security
    API
    class Interaction(object):
    def add(self, participation):
    def remove(self, participation):
    def checkPermission(self, permission, object):
    # [...]
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28. Transaktionen
    2-Phase-Commit
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29. Transaktionen
    2-Phase-Commit
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30. Transaktionen
    2-Phase-Commit
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31. Transaktionen
    2-Phase-Commit
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32. Transaktionen
    2-Phase-Commit
    Fehlerfall
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33. Transaktionen
    2-Phase-Commit
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34. Transaktionen
    2-Phase-Commit
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35. Transaktionen
    API
    transaction
    commit / abort
    savepoint
    get
    doom
    join
    DataManager
    tpc_begin – commit – tpc_vote – (tpc_finish | tpc_abort)
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36. Transaktionen
    Beispiel
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38. Test-Setup
    unittest.TestCase
    class ExampleTest(unittest.TestCase):
    def setUp(self):
    def tearDown(self):
    def test_something(self):
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39. Test-Setup
    gemeinsames setUp
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40. Test-Setup
    Stacking
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41. Test-Setup
    Layer
    class Layer(object):
    __bases__ = (OTHER_LAYER,)
    def setUp(self):
    def tearDown(self):
    def testSetUp(self):
    def testTearDown(self):
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42. Test-Setup
    Beispiel
    class PersistenceTest(unittest.TestCase):
    layer = DB_LAYER
    def test_serializing_document_parameters(self):
    # [...]
    class IntegrationTest(unittest.TestCase):
    layer = COMBINED_LAYER
    def test_search_displays_suggestions_from_database(self):
    # [...]
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43. Test-Setup
    Beispiel
    class DatabaseLayer(plone.testing.Layer):
    def setUp(self):
    self.connection = dbdriver.connect(os.environ[’DSN’])
    def tearDown(self):
    self.connection.close()
    DB_LAYER = DatabaseLayer()
    HTTP_LAYER = HTTPServerLayer()
    COMBINED_LAYER = plone.testing.Layer(
    bases=(DatabaseLayer, HTTPServerLayer))
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45. Testbrowser
    Beispiel
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46. Testbrowser
    Beispiel
    class SearchTest(unittest.TestCase):
    def test_advanced_search_filters_by_content_type(self):
    b = zope.testbrowser.wsgi.Browser(
    wsgi_app=my_wsgi_callable)
    b.open(’http://localhost’)
    b.getLink(’Advanced Search’).click()
    b.getControl(name=’q’).value = ’zope’
    b.getControl(’Content type’).displayValue = [’HTML’]
    b.getControl(’Search’).click()
    self.assertEqual(’10’, b.getControl(’Results per page’))
    self.assertIn(’fisch’, b.contents)
    # not released yet, unfortunately
    self.assertEllipsis(’...fisch...framework...’)
    Wolfgang Schnerring Zope-Ideen 06.10.2011 37 / 39
    

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47. Ressourcen
    http://pypi.python.org/pypi/
    http://www.sxc.hu/photo/1087620 by nkzs
    1 zope.traversing
    2 zope.configuration
    grokcore.component
    zope.annotation
    3 zope.component,
    zope.interface, zope.event
    4 zope.security
    5 zope.testrunner, plone.testing
    6 transaction, repoze.tm2
    zope.sqlalchemy,
    zope.sendmail,
    gocept.amqprun
    7 zope.testbrowser
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48. Wir suchen Mitarbeiter in Halle!
    Softwareentwicklung
    Web
    Python
    TDD
    Systemadministration
    Gentoo/KVM
    Puppet
    Nagios
    Bei Interesse: mich ansprechen oder jobs@gocept.com
    Wolfgang Schnerring Zope-Ideen 06.10.2011 39 / 39
    

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