1. Lukas Renggli, April 2003Slide 1 SmallWiki Smalltalk Wiki Design

2. Lukas Renggli, April 2003Slide 2 Design  Not a question about …  good, bad  performance  using every design pattern  But a question about …  better, worse  extensibility, simplicity, naturally Simple things should be simple and complex things should be possible. --- Alan Kay

3. Lukas Renggli, April 2003Slide 3 Goals for Today  Understanding  The basics of the current design  Most important design decisions  Design flaws  Questioning  Discussing

4. Lukas Renggli, April 2003Slide 4 Goals for SmallWiki  Everything is an Object  Extensibility  Components  Web server  Storage  Test suites  Open source  Dialect independent

5. Lukas Renggli, April 2003Slide 5 Client - Server SwazooServer StructureServer Request Response Client Web Browser

6. Lukas Renggli, April 2003Slide 6 Composites  Structure: Folder, Page, Resource, …  Title, Parent, Version, Properties, …  Url, Root, Template, Renderer, …  Document: Paragraph, Text, Link, …  Representation of the wiki string  Template: WikiTitle, ActionList, …  Relative position on the page  Content of the component

7. Lukas Renggli, April 2003Slide 7 Structure FolderPageResource 1 * predecessor children 1 0..1 childrendata, mime-typedocument title, predecessor, properties, parent parent 1 1

8. Lukas Renggli, April 2003Slide 8 Document Component Horizontal Rule Document Composite 1 * List Text Preformatted Paragraph Mail Internal Link External OrderedList UnorderedList Header … Table Document …

9. Lukas Renggli, April 2003Slide 9 Template  Responsibilities  Relative position on the page  Content of the component Template>>for: anAction Wiki Title Path Actions Refs Page Title Content Search Page Title Content Actions

10. Lukas Renggli, April 2003Slide 10 Summary  Structure  general information  template composite  renderer class  Page  document composite  Template  Visitor

11. Lukas Renggli, April 2003Slide 11 Visitor  Rendering  HTML  Wiki Syntax  Latex  Searching  References  Text :Folder :Resource:Page :Document :Paragraph :Text:Link:Text :Header … :Template

12. Lukas Renggli, April 2003Slide 12 Serving ch1: Folderroot: Folder pa1: Page HTTP-GET /ch1/pa1?action=EditPage 1: process2: process 3: process 4: processAction :EditPage 5: execute 6: render 7.1: template :Visitor 8. render 7.2: renderer :Template 9.1*: accept :Document 9.2*: visit and

13. Lukas Renggli, April 2003Slide 13 Codeing Inspiration comes from the act of writing. --- Steven Dunn

14. Lukas Renggli, April 2003Slide 14 Future  Short Term  Public Beta  More Components  Long Term  Become the killer Wiki  Port to other Dialects  Integration with Seaside