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Jython on Django
Jython on Django
Jython on Django
Jython on Django
Jython on Django
Jython on Django
Jython on Django
Jython on Django
Jython on Django
Jython on Django
Jython on Django
Jython on Django
Jython on Django
Jython on Django
Jython on Django
Jython on Django
Jython on Django
Jython on Django
Jython on Django
Jython on Django
Jython on Django
Jython on Django
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Jython on Django

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EuroDjangoCon "Jython on Django" presentation

EuroDjangoCon "Jython on Django" presentation

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  • I thought it's very funny...If I can't use pil in jython...how do I use the ImageFiled in Django?Use a FileFiled instead of it?-..- maybe that's a way...
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  • 1. Django on Jython Frank Wierzbicki frank.wierzbicki@sun.com
  • 2. Who am I? • Frank Wierzbicki • Project lead for Jython • I work at Sun (Oracle?) on Jython fulltime
  • 3. What is Jython? • Python that runs on the JVM • Compiled to Java bytecodes instead of Python bytecodes • Call Java code seamlessly from Python code
  • 4. Jython Status • Current prod version 2.2 is not useful for Django • Jython 2.5 beta4 is out • First RC as early as this Friday • So production release real-soon-now
  • 5. Modjy • Modjy implements WSGI for Jython • Acts as a bridge to Java Servlets • integrated into Jython’s core • This is a big part of how we get Django working.
  • 6. zxJDBC • zxJDBC implements DB-API • integrated into Jython’s core • Another crucial piece to get Django working.
  • 7. Jython on Django Status • Works well with Django 1.0.3 and postgresql • Other databases in progress: MySQL, Oracle, SQLite, MS SqlServer • Django 1.1 has some refactorings that Jython will need to catch up on...
  • 8. Why Jython? • Massive amounts of Java code out there • Some really useful Java libs • Great JVM ecosystem • Internal Java apps that are not yet exposed to the web
  • 9. What can I use? • setuptools • ez_install • virtualenv • pip • many more pure Python tools
  • 10. What can’t I use yet? • c-extensions • PIL • ctypes (but we’re working on this one!) • iPython (working on this too!)
  • 11. Configure Jython • Get ez_setup.py • run “jython ez_setup.py” • In Jython’s bin directory will be an ez_install that runs from Jython
  • 12. Installing Django on Jython • Get 1.0.3+ Django - run “jython setup.py install” • From http://django-jython.googlecode.com get django-jython-1.0b1.tar.gz, untar it and run “jython setup.py install” • see the django-jython project on googlecode.com for more detail
  • 13. Java Platform • Now takes advantage of Java 5 libraries • Java 5 concurrency libs: No GIL! • Use a choice of Java garbage collectors • Use Java native threads • -J flag namespace for JVM config
  • 14. Java Integration • Jython integrates well with Java • Java classes and interfaces can be subclassed from Jython • These subclasses are now “new style” classes.
  • 15. Example: The Java lib poi can read Excel
  • 16. Deployment • run “jython manage.py war --include-java- libs=jdbcdriver.jar” • This will produce a “war file” • Copy this war file to the auto-deploy directory for most application servers (like GlassFish)
  • 17. war format for doj |-- WEB-INF | |-- lib | `-- lib-python | |-- Lib | |-- django | |-- doj | `-- mysite `-- media
  • 18. Why Django on Jython? • Lots of ops departments out there that want to deploy to Java App Servers - “give us a war file” • They have lots of tools for monitoring, etc • Jython has a good story for threading and performance - and it’s getting better.
  • 19. Da Vinci Machine • JVM gets friendlier to dynamic languages • On the project plan for JDK 7 -- some of it has already there in a hidden state for JDK6 • Method Handles, Invokedynamic, etc • Hotspot is one of the world’s best tuned VMs - about to be tuned better for us!
  • 20. Jython Book due in 2009 from Apress • Josh Juneau • Jim Baker • Leo Soto • Victor NG • Frank Wierzbicki
  • 21. Where to Find Out More • http://www.jython.org • http://wiki.python.org/jython • http://fwierzbicki.blogspot.com • Twitter: fwierzbicki • http://www.netbeans.org/features/python/ • https://glassfish.dev.java.net/

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