human-readable

ability to work with live .fs

1999-10-22

understanding of acquisition is important

Acquisition vs. Inheritance

Objects are situated inside other objects. These objects act as their "containers".

may acquire behavior from their containers

and files

The main CSS wrappers

The default title for a Plone 3 site has the page title on the left and portal title on the right, separated by an em dash

create a class to render your title

override the plone.htmlhead.title viewlet

Override the viewlet in your own [theme]/browser/configure.zcml

add the location of your new class

Jon Stahl

Plone 4 is about to

enter beta testing prior to a final release

performance

what does all this mean?  Well, honestly, not much

realistic sample content

very, very proud of Plone’s raw speed

suspect MAMP not to be very efficient

Jan 19th, 2010

the difference is down to Plone’s use of the ZODB

Contrast this to the PHP/MySQL systems which must perform several selects in order to render the page

ZODB fetches are serial

addressed as part of Dexterity

fundamental architectural difference

CMSes that use the RDBMS and some kind of ORM or manual SQL (like Drupal, Joomla)

those that use an OODBMS such as Plone

‘out of the box’ speed, since that is something a lot of people historically have not liked about Plone

our installer sets up ZEO with clients for you, so this is “out-of-the-box”

counter the (incorrect) perception out there that “Plone is slow”

how to properly unit test your content type and workflow security declarations

something better

a clue how to one could hit Unauthorized exceptions in unit testing

Advanced

Routine maintenance

A ZODB database instance is easy to maintain

periodic packing

ZODB is cutting-edge stuff, and it is used in several important projects

15 Apr 2008

daily packing is often perfectly appropriate

object databases can seem somewhat exotic

their hierarchical structure is a natural complement to the hierarchical nature of content management systems

cron job to

If, instead of having a script open your "Data.fs" directly, you are using a ZEO server

packing will be simpler

will also not require that your clients disconnect

zodb cache site of 5000 objects

suggest smaller cache

cache megabyte limiter

expect to see the total amount of lines of code to decrease further

more features with less lines

sane, insulated environment

Useful pdb commands

s = step into, go into the function in the cursor n = step over, execute the function under the cursor without stepping into it c = continue, resume program bt = print stack trace up = go to the scope of the caller function

Useful pdb snippets

02-ene-08

haystack_tool included a couple of methods

summarize text

list of "topics" extracted from the content

portlets to demonstrate its functionality

linguistic mapping and automated conceptual mapping, providing high-quality relationships with little or no human effort

Implementing this in Plone

trigger a script in a workflow transition

fill the Subject field

additional field to store

list of pending stuff to test (with a little help of Matt Bowen, of course)

Great idea

python text summariser which doesn't require Yahoo's web service

several ways to relate content, both based on keywords and based on explicit relationships, in stock Plone

9 days earlier

Undo was no longer an option

Truncating the Data.fs (removing all transactions since, including the offending one)

undesirable

small additional buildout configuration file

beforestorage.cfg

enable-product-installation

tells Zope not to try and write product information to the ZODB

because zc.beforestorage puts your ZODB in read-only mode

<zodb_db main>    # Main database    cache-size 650000%import zc.beforestorage%import relstorage <before> before 2008-12-08T10:29:03    <relstorage>        <oracle>            dsn RELSTORAGE_DSN            password xxxxxxxxx            user xxxxxxxx        </oracle>    </relstorage> </before>    mount-point /</zodb_db>

when you start the instance, you are in the past

found the lost object

Export/Import

save the export on the server

buildout with your regular buildout file

restart

import the .zexp

reindex the imported content

Martijn Pieters