Reusando componentes Zope fuera de Zope (y la web)

Roberto AllendeMenttes / Plone Foundation

rallende@menttes.com

http://robertoallende.comtwitter: robertoallende

Buildout ZODB Zope Page Templates Adaptadores

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

Tool for working with eggs

Repeatable

Developer oriented

Buildout | Features

$ easy_install zc.buildout

Buildout | Install

$ svn co http://miproyecto$ python bootstrap.py$ bin/buildout -v…$ bin/miproyecto.py

Buildout | Deploy con buildout

project/ bootstrap.py buildout.cfg .installed.cfg parts/ develop-eggs/ bin/ buildout miproyecto eggs/ downloads/

Buildout | Deploy con buildout

[buildout]index-url = http://pypi.it.uwosh.edu/parts = instance zopepy

eggdeps degraph

extends = http://download.zope.org/Zope2/index/2.13.0a3/versions.cfgeggs = tl.eggdeps

[instance]recipe = plone.recipe.zope2instanceuser = admin:adminhttp-address = 8080products = ${buildout:directory}/products

Buildout | buildout.cfg

http://buildout.org

Buildout | Mas información

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

ZODB

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

$ easy_install ZODB3$ easy_install ZODB3……

$ python$ python>>> import ZODB>>> import ZODB

ZODB | Instalación

>>> 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

>>> root['account-1'] = Account()>>> root['account-1'] = Account()>>> root['account-2'] = Account()>>> root['account-2'] = Account()

ZODB | Haciendo un objeto persistente

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

ZODB | Transactions

http://zodb.orghttp://zodb.org

ZODB | Mas Lectura

Zope Page Template allows you to generate Zope Page Template allows you to generate HTML dynamically.HTML dynamically.

Chameleon compiles templates to Python byte-code. It includes a Chameleon compiles templates to Python byte-code. It includes a complete implementation of the Zope Page Templates (ZPT) language and complete 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

ZPT templates are valid XML documentsZPT templates are valid XML documents

It uses namespaces for attributes and tags to It 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, including Works on Python 2.4, 2.5 and 2.6, including Google App EngineGoogle App Engine

PHP, Java, PerlPHP, Java, Perl

ZPT vía Chameleon

$ easy_install Chameleon$ easy_install Chameleon

ZPT vía Chameleon | Install

<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

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

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

http://chameleon.repoze.orghttp://chameleon.repoze.org

http://blog.notdot.nethttp://blog.notdot.netWebapps on App Engine, part 4: TemplatingWebapps on App Engine, part 4: Templating

ZPT vía Chameleon | Mas Lectura

Dynamic adaptation might feel like a type Dynamic 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

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

Intrusivo clase base Intrusivo clase base

Test aisladamente Test aisladamente

Control factory Control 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

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Mixin

oo

oo

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MonkeyPatch

oo

xx

xx

xx

Adapter

oo

oo

oo

oo

xx

oo

oo

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oo

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Adaptera'la Zope

1. Define an interface1. Define an interface

2. Register our adapter2. Register our adapter

3. Request adaptation3. Request adaptation

Adapters | 1, 2, 3

$ easy_install zope.interface$ easy_install zope.interface$ easy_install zope.component$ easy_install zope.component

Adapters | Install

import zope.interfaceimport zope.interfaceclass 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

from zope.interface.adapter import AdapterRegistryfrom zope.interface.adapter import AdapterRegistryregistry = AdapterRegistry()registry = AdapterRegistry()registry.register([IFile], ISize, '', FileSize)registry.register([IFile], ISize, '', FileSize)

Adapters | Register our adapterRegister our adapter

>>>>>> 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

Using the Adapter RegistryUsing the Adapter Registryhttp://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 DuckBrandon Rhodes - Pycon08, PloneConf 08Brandon Rhodes - Pycon08, PloneConf 08

Adapters | Mas Lectura

Muchas Gracias

Roberto Allendehttp://robertoallende.com

Twitter: robertoallenderallende@menttes.com