Published on March 5, 2014
Some Dope On Zope An introduction to the Zope application server. Kiran Jonnalagadda <email@example.com> Based on the presentation by Tim Wilson <firstname.lastname@example.org>
What is Zope? Zope is an open source application server written in Python that features a transactional rd object database, distributed control, lots of 3 party products, a search engine, and a growing community of users and developers.
History of Zope In November 1998, Digital Creations combined Bobo, an open source Web-object toolkit, and Principia, a commercial Web-application platform. DC's venture capital firm encouraged them to open source their software and Zope was born. DC has since renamed themselves to Zope Corporation.
Architecture Zope has a component architecture: ❑ ZServer ❑ Zope Core ❑ Object Database (ZODB) ❑ RDBMS Integration ❑ Zope Products ❑ ZClasses
ZServer ❑ Supports HTTP, FTP, WebDAV, XMLRPC, FastCGI and PCGI ❑ Plays well with others (Apache, Squid) ZServer does not make a great static content delivery system. Proxies therefore make a world of a difference. Zope internally supports caching of expensive SQL queries and heavily dynamic content.
Zope Core Zope has a built-in ❑ Search engine ❑ Flexible security layer ❑ Membership ❑ Dynamic Text Markup Language (DTML) example: <dtml-var foo>
Object Database The Zope Object Database (ZODB): ❑ Behaves like a file system ❑ Supports: ❑ ❑ Undos ❑ ❑ Transactions Private Versions Scales well with fail-over support using ZEO
RDBMS Integration Zope supports connections to: ❑ Oracle ❑ Sybase ❑ ODBC ❑ Solid ❑ MySQL ❑ PostgreSQL
Zope Plugins Zope is extended in two main ways: ❑ Add-on Python Products ❑ ❑ Powerful, take full advantage of Python ❑ ❑ Created in the file system Very distributable ZClasses ❑ New object type created through the Web ❑ Requires no programming
Zope Advantages I prefer Zope over other systems because: ❑ I don't have to create all the content ❑ Users can't nuke the rest of the site ❑ Easy workflow (using CMF) ❑ Acquisition makes it easy to propagate changes ❑ Versions make it possible to experiment on a live site
Zope Disadvantages Zope isn't a cure-all because: ❑ It really helps to grok Python and OOP ❑ Most managers still haven't heard of it ''What if you get hit by a bus?'' ❑ The dynamic functionality is a massive overhead for simple sites ❑ It's not easy!
Acknowledgments ❑ This presentation was originally created by Tim Wilson <email@example.com> who has graciously given me permission to reuse his slides. The original presentation was created using vim and latex. ❑ Most of the details listed on these slides are taken from www.zope.org and www.zope.com.
Questions? The Indian Zope and Python User Group has a mailing list at http://groups.yahoo.com/group/izpug.
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