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Oracle HTMLDB introduction

Oracle HTMLDB introduction. IT-AIS Developers Pizza Forum: 28 April 2005. What is HTMLDB. A rapid web application development tool for the Oracle database. 100% web based development PL/SQL driven. Architecture. Everything is in the Database!. Oracle. WebServer. Client. RDBMS. HTMLDB.

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Oracle HTMLDB introduction

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  1. Oracle HTMLDB introduction IT-AIS Developers Pizza Forum: 28 April 2005 1/15

  2. What is HTMLDB • A rapid web application development tool for the Oracle database. • 100% web based development • PL/SQL driven 2/15

  3. Architecture Everything is in the Database! Oracle WebServer Client RDBMS HTMLDB 3/15

  4. Pros & Cons Pros • Fast development • 100% web based • No code required • Ready to use components • Professional looking • Easy to create mock-ups • Easy to deploy • Easy to understand • Fast (no overhead) Cons • Platform lock • Difficult to debug • Tricky to customize • Scaling problems • Difficult version control 4/15

  5. Trade Off Comparison Effort Good for small/simple projects J2EE HTMLDB ? Results 5/15

  6. Real World Examples • HTMLDB Itself! • AskTom • CERN: Pre Registration Tool • CERN: Safety Information Registration • http://htmldb.oracle.com/references 6/15

  7. Development Cycle RDBMS HTMLDB Web Interface Developer HTMLDB Engine Application Metadata Web Application User 7/15

  8. HTMLDB Interface Application Builder • Create pages • Manage shared components (Items, Templates, Translations, …) • Import & Export application SQL Workshop • Browse DB Objects (Tables, Packages, DBLinks, Java Classes, …) • Create DB Objects • Run arbitrary SQL Data Workshop • Import/Export Data from/to XML/Spreadsheet 8/15

  9. Page Creation: Overview Request Page Pre-processing Client Rendering Order can be finely tuned mixing processing and rendering. Post-processing Branching Same or other Page 9/15

  10. Page Creation: Rendering User Interface Items Data Loading PL/SQL Repository Input Text Checkbox Report Every Item corresponds to a “global” variable 10/15

  11. Processing & Branching • Processes • execute PL/SQL • manage sessions state • Reports pagination • Many others … • Computations • Set “item” values • SQL or PL/SQL driven • Static values • Other item values • Branches • Application Page • External URL • Functions returning URL/page • Others … 11/15

  12. Example: Room Booking Use Cases • Search for first available time slot • Book desired time slot • Show room availability 12/15

  13. Conclusions • Fast implementation • Good looking results • Good for small to medium applications • It takes some time to get used to it 13/15

  14. Resources • Official Oracle Page http://www.oracle.com/technology/products/database/htmldb/index.html • Good support forumhttp://forums.oracle.com/forums/forum.jsp?forum=137 • AskTom http://asktom.oracle.com/ • Newsgroups comp.databases.oracle.tools 14/15

  15. Questions? ? 15/15

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