The slides of my workshop during the TYPO3 Developer Days 2012 in Munich.

1. Extbase
Object to XML Mapping
Thomas Maroschik

2. Agenda
• XML basics
• Current state of EXT:palm
• Fail of EXT:palm
• Vision and the future
• Discussion

3. XML Basics

4. Key Technologies
• XML
• Schema
• DTD
• XSD
• RelaxNG
• XPath / XQuery
• XSLT

5. XML Document

6. XML Namespace

7. XML Namespaces

8. XML Schema (DTD)
Deprecated, W3C Recommendation

9. XML Schema (XSD)
Popular, W3C Recommendation

10. XML Schema (RelaxNG)
Popular, Oasis/ISO Standard

11. XPath
/bookshelf/book/title
/bookshelf/book[1]/title
/bookshelf/book/author/text()
/bookshelf/book[price<37]/title

12. XSLT

13. Current State of EXT:palm

14. Features
• Generate XML schema (XSD) from annotated
Domain Models
• Serialize instances of Domain Models to XML
document
• Unserialize XML document to instances of
Domain Models
• merging of XML data with existing data from
repositories by rules
• Backend module
• Scheduler task
• No XML Namespaces yet

15. Example Domain Model

16. Example Palm Usage

17. Example Palm Merger Usage

18. Live Demo

19. Fail of EXT:palm

20. Inner Concept
• uses annotations for binding
• uses reflection for mapping
• serializing and unserializing is configurable
by typoscript
• uses DOM for XML access

21. Serializer Concept
• iterates recursively over object
• builds DOMDocument directly
=> 2 in memory representations of data

22. Unserializer Concept
• iterates recursively over DOMDocument
• maps the data to an array
• array is mapped to object by property
mapper
=> 3 in memory representations of data

23. Merger Concept
• can import/merge external data by
unserializing xml to object
• fetches domain object from repository
• compares objects and applies changes by
rules
=> 4 in memory representations of data

24. But why does this fail?

25. Reasons for Fail
• everything is defined global
• domain object cannot be serialized to
different xml outputs
• configuration via TS in Extbase is flawed
• massive memory consumption
• reflection is quite slow

26. Conclusion
• currently just usable for limited usecases

27. Hacks to get it work
• import/merge all of a 2,2MB XML file takes
of up to 2,5GB of memory
• 2 scheduler tasks
• one that populates a jobqueue
• one that does just a single import/merge
at a time (import of 60 aggregate roots
takes 60 Minutes)

28. Vision and the future

29. Concept
XML Schema
generate use
serialize serialize
XML Data Binding Object
unserialize unserialize
use generate
Classes

30. Implementation Concept
• binding will be done by a binding document instead
of annotations
=> xml and objects may have very different
structure
=> custom un-/serializers for data types
=> no global configuration anymore
• compile binding to php
=> no reflection at runtime anymore
• use xml reader/writer instead DOM
=> save memory and gain speed

31. How could the binding look like?
Example from jibx.sourceforge.net

32. What do you think?

33. Thanks!
Contact me via:
tmaroschik@dfau.de
@tom_noise
Contribute via:
forge.typo3.org/projects/extension-palm/