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SWAZoo - AIDA

SWAZoo - AIDA. A Smalltalk Web Application Server Janko Mivsek Eranova d.o.o. Ljubljana, Slovenia On the sunny side of the Alps. Contents. AIDA/Web demo architecture examples SWAZoo goals Discussion. AIDA/Web. A Web server Framework for dynamic web applications. Where is usefull?.

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SWAZoo - AIDA

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  1. SWAZoo - AIDA A Smalltalk Web Application Server Janko Mivsek Eranova d.o.o. Ljubljana, Slovenia On the sunny side of the Alps

  2. Contents • AIDA/Web • demo • architecture • examples • SWAZoo • goals • Discussion

  3. AIDA/Web • A Web server • Framework for dynamic web applications

  4. Where is usefull? • Internet • web sites, portals, e-shops, e-commerce, newspapers, discussion forums, … • Intranet, Extranet • Web based business apps • B2B • CRM, Document systems, Unified messaging • ...

  5. Competition • Java • IBM WebSphere • ... • Microsoft

  6. AIDA/Web demo

  7. Download it and try! • http://www.eranova.si/aida • complete source • small demo • Open source

  8. Architecture • Original design ideas • MVC for the Web • WebElements • Session management • Security • Persistent everything • Smalltalk Server Pages

  9. Original design ideas • Web of objects • … connected by object references • Web ob pages • … connected by URLl links

  10. Original design ideas • Every object should be able to represent itself as a web page • Object references should be mapped to URL references and vice-versa (automatically!)

  11. MVC on Web • Complete separation of presentation from domain model • Observer pattern: domain object are not aware of presentation

  12. MVC on Web domain object a WebApp observee domain object

  13. MVC on Web • Multiple Views of the same object • discussions - hierarchical/cronological • Registration of web print methods for different views

  14. MVC on Web • Web forms • Input fields connected to domain object attributes with a pluggable adapter • Submit button • Action methods

  15. WebElements • Smalltalk objects representing the elements of a web page • text, url links, images, tables, input fields, … • Composite objects • nesting of web elements • reusable web components

  16. Complete path of a WebRequest

  17. Session management • Sessions used to separate users from each other • Web is stateless • Session identification • cookies • parameter in an URL • Sessions are permanent and persistent

  18. Security • Access rights • who is allowed to view or update my object? • Access rights for each view • separate right for update (form submit) • URL links to the prohibited objects are inactive • Authentication

  19. Security • SSL (Secure Socket Layer) • SSLSocketAccessor • Seamless integration in AIDA/Web

  20. Persistent Everything • Almost all objects of AIDA/Web are persistent • requests, sessions, security, … • Gemstone or Versant ODB used • Lightweight TransactionMonitor • Caching on a AIDA/Web side • 35.000 hits/h

  21. Smalltalk Server Pages • Calls to Smalltalk from HTML static pages • Like ASP, JSP, … • <AIDA WebStatistics printCounter>

  22. Examples

  23. SWAZoo • Smalltalk Web Application ZOO :-)) • a CampSmalltalk project • Merging all Web related work together • Commanche, Hydrogen, ByteSmiths toolkit, AIDA/Web • VisualWave, VisualAge SST

  24. Internet related CS projects • Internet Client/Server framework • Smalltalk Web Application Server • SOAP • XML

  25. SWAZoo • HTTP 1.1 server • Virtual servers • Resource hierarchy • URL resolution • HTTPRequest parsing

  26. Discussion Smalltalk in e-commerce world?

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