La charla propone hacer un recorrido y revisión de componentes y conceptos empleados en Zope que puedan ser empleados de forma independiente en otras aplicaciones, incluso que no sean web.

1. Reusando componentes Zope fuera de Zope
(y la web)
Roberto Allende
Menttes / Plone Foundation
rallende@menttes.com
http://robertoallende.com
twitter: robertoallende

2.  Buildout
 ZODB
 Zope Page Templates
 Adaptadores

3. Buildout is a Python-based build system for
creating, assembling and deploying applications
from multiple parts, some of which may be non-
Python-based. It lets you create a buildout
configuration and reproduce the same software
later.
Buildout

4. Tool for working with eggs
Repeatable
Developer oriented
Buildout | Features

5. $ easy_install zc.buildout
Buildout | Install

6. $ svn co http://miproyecto
$ python bootstrap.py
$ bin/buildout -v
…
$ bin/miproyecto.py
Buildout | Deploy con buildout

7. project/
bootstrap.py
buildout.cfg
.installed.cfg
parts/
develop-eggs/
bin/
buildout
miproyecto
eggs/
downloads/
Buildout | Deploy con buildout

8. [buildout]
index-url = http://pypi.it.uwosh.edu/
parts = instance
zopepy
eggdeps
degraph
extends = http://download.zope.org/Zope2/index/2.13.0a3/versions.cfg
eggs = tl.eggdeps
[instance]
recipe = plone.recipe.zope2instance
user = admin:admin
http-address = 8080
products = ${buildout:directory}/products
Buildout | buildout.cfg

9. http://buildout.org
Buildout | Mas información

10. Don’t squeeze your objects into tables:
store them in an object database.
ZODB

11. Transparent persistence for Python objects
Full ACID-compatible transaction support
History/undo ability
Efficient support for binary large objects (BLOBs)
Pluggable storages
Scalable architecture
ZODB | Features

12. $ easy_install ZODB3$ easy_install ZODB3
……
$ python$ python
>>> import ZODB>>> import ZODB
ZODB | Instalación

13. >>> from ZODB.FileStorage import FileStorage>>> from ZODB.FileStorage import FileStorage
>>> from ZODB.DB import DB>>> from ZODB.DB import DB
>>> storage = FileStorage('Data.fs')>>> storage = FileStorage('Data.fs')
>>> db = DB(storage)>>> db = DB(storage)
>>> connection = db.open()>>> connection = db.open()
>>> root = connection.root()>>> root = connection.root()
ZODB | Configuración

14. >>> root['account-1'] = Account()>>> root['account-1'] = Account()
>>> root['account-2'] = Account()>>> root['account-2'] = Account()
ZODB | Haciendo un objeto persistente

15. >>> import transaction>>> import transaction
>>> transaction.commit()>>> transaction.commit()
>>> root.keys()>>> root.keys()
['account-1', 'account-2']['account-1', 'account-2']
ZODB | Transactions

16. http://zodb.orghttp://zodb.org
ZODB | Mas Lectura

17. Zope Page Template allows you to generateZope Page Template allows you to generate
HTML dynamically.HTML dynamically.
Chameleon compiles templates to Python byte-code. It includes aChameleon compiles templates to Python byte-code. It includes a
complete implementation of the Zope Page Templates (ZPT) language andcomplete implementation of the Zope Page Templates (ZPT) language and
a partial implementation of the Genshi language.a partial implementation of the Genshi language.
ZPT vía Chameleon

18. ZPT templates are valid XML documentsZPT templates are valid XML documents
It uses namespaces for attributes and tags toIt uses namespaces for attributes and tags to
define the template behaviour.define the template behaviour.
Works on Python 2.4, 2.5 and 2.6, includingWorks on Python 2.4, 2.5 and 2.6, including
Google App EngineGoogle App Engine
PHP, Java, PerlPHP, Java, Perl
ZPT vía Chameleon

19. $ easy_install Chameleon$ easy_install Chameleon
ZPT vía Chameleon | Install

20. <table border="1"><table border="1">
<tr<tr tal:repeat="row range(10)"tal:repeat="row range(10)">>
<td<td tal:repeat="column range(10)"tal:repeat="column range(10)">>
<span<span tal:define="x repeat.row.number;tal:define="x repeat.row.number;
y repeat.column.number;y repeat.column.number;
z x * y"z x * y"
tal:replace="string:$x * $y = $z"tal:replace="string:$x * $y = $z">1 * 1 =>1 * 1 =
</span></span>
</td></td>
</tr></tr>
</table></table>
ZPT vía Chameleon | Template loader

21. from chameleon.zpt import loaderfrom chameleon.zpt import loader
template_path = os.path.join(os.path.dirname(__file__), "..", "templates")template_path = os.path.join(os.path.dirname(__file__), "..", "templates")
template_loader = loader.TemplateLoader(template_path,template_loader = loader.TemplateLoader(template_path,
auto_reload=os.environ['SERVER_SOFTWARE'].startswith('Dev'))auto_reload=os.environ['SERVER_SOFTWARE'].startswith('Dev'))
ZPT vía Chameleon | Ejemplo

22. def TestHandler(RequestHandler):def TestHandler(RequestHandler):
def get(self):def get(self):
template = template_loader.load("test.pt")template = template_loader.load("test.pt")
self.response.body = template(name="test")self.response.body = template(name="test")
ZPT vía Chameleon | Ejemplo

23. http://chameleon.repoze.orghttp://chameleon.repoze.org
http://blog.notdot.nethttp://blog.notdot.net
Webapps on App Engine, part 4: TemplatingWebapps on App Engine, part 4: Templating
ZPT vía Chameleon | Mas Lectura

24. Dynamic adaptation might feel like a typeDynamic adaptation might feel like a type
declaration, but it's not!declaration, but it's not!
It specifies a behavior, not a type; it's dynamic;It specifies a behavior, not a type; it's dynamic;
it's optional.it's optional.
Adapters

25. class File(object):class File(object):
body = 'foo bar'body = 'foo bar'
class FileSize(object):class FileSize(object):
def __init__(self, context):def __init__(self, context):
self.context = contextself.context = context
def getSize(self):def getSize(self):
return len(self.context.body)return len(self.context.body)
tamano = FileSize(File())tamano = FileSize(File())
print client.request()print client.request()
Adapters | Wrapper

26. Intrusivo clase baseIntrusivo clase base
Test aisladamenteTest aisladamente
Control factoryControl factory
Colision de nombresColision de nombres
Patches compitenPatches compiten
Lo hace RubyLo hace Ruby
Wrapping es molestoWrapping es molesto
Zope es Cool!Zope es Cool!
Adapters | Comparación con Otros
por Brandon Craig Rhodes
Herencia
oo
xx
xx
xx
Mixin
oo
oo
xx
xx
MonkeyPatch
oo
xx
xx
xx
Adapter
oo
oo
oo
oo
xx
oo
oo
oo
oo
oo
oo
Adapter
a'la Zope

27. 1. Define an interface1. Define an interface
2. Register our adapter2. Register our adapter
3. Request adaptation3. Request adaptation
Adapters | 1, 2, 3

28. $ easy_install zope.interface$ easy_install zope.interface
$ easy_install zope.component$ easy_install zope.component
Adapters | Install

29. import zope.interfaceimport zope.interface
class IFile(zope.interface.Interface):class IFile(zope.interface.Interface):
body = zope.interface.Attribute('Contents of the file.')body = zope.interface.Attribute('Contents of the file.')
class ISize(zope.interface.Interface):class ISize(zope.interface.Interface):
def getSize():def getSize():
'Return the size of an object.''Return the size of an object.'
Adapters | Define an interface

30. from zope.interface.adapter import AdapterRegistryfrom zope.interface.adapter import AdapterRegistry
registry = AdapterRegistry()registry = AdapterRegistry()
registry.register([IFile], ISize, '', FileSize)registry.register([IFile], ISize, '', FileSize)
Adapters | Register our adapterRegister our adapter

31. >>>>>> def hook(provided, object):def hook(provided, object):
>>>>>> adapter = registry.lookup1(zope.interface.providedBy(object),adapter = registry.lookup1(zope.interface.providedBy(object),
>>>>>> provided, '')provided, '')
>>>>>> return adapter(object)return adapter(object)
>>>>>> from zope.interface.interface import adapter_hooksfrom zope.interface.interface import adapter_hooks
>>>>>> adapter_hooks.append(hook)adapter_hooks.append(hook)
>>> size = ISize(file)>>> size = ISize(file)
>>> size.getSize()>>> size.getSize()
77
Adapters | Request adaptationRequest adaptation

32. Using the Adapter RegistryUsing the Adapter Registry
http://docs.zope.org/zope3/Book/ifaceschema/human/show.htmlhttp://docs.zope.org/zope3/Book/ifaceschema/human/show.html
Using Grok to walk like a DuckUsing Grok to walk like a Duck
Brandon Rhodes - Pycon08, PloneConf 08Brandon Rhodes - Pycon08, PloneConf 08
Adapters | Mas Lectura

33. Muchas Gracias
Roberto Allende
http://robertoallende.com
Twitter: robertoallende
rallende@menttes.com