Java Framework for Database-Centric Web Engineering
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The document presents a Java framework for database-centric web engineering, addressing the need for adaptable web interfaces due to the rise of diverse devices with varying browser capabilities. It discusses the OMS database development suite, which facilitates separation of content and presentation using XML and XSL, and introduces a content management server to manage document content efficiently. Overall, the framework supports the entire development process for db-centric web applications and provides high-level data management solutions.
Java Framework for Database-Centric Web Engineering
- 1. Java Framework for Database- Centric Web Site Engineering Beat Signer, Michael Grossniklaus and Moira C. Norrie {signer, grossniklaus, norrie}@inf.ethz.ch Institute for Information Systems ETH Zurich
- 2. Outline • Motivation • OMS Database Development Suite • XML Server Component • Customised Applications • Content Management Server
- 3. Motivation • Current web interfaces to DB systems are Based on HTML and related technologies Optimised for large displays (> 640x480 pixels) • Trend to new types of devices with different browser capabilities WebPads, Handhelds (Palm, Handspring,... ), WAP- enabled mobile phones, NTT DoCoMo's I-Mode phones, Digital TV, ... Not suited for 1:1 rendering of most existing web sites
- 4. Motivation... • Generic database interface instead of developing a new interface from scratch for every device type Use a technology which allows the separation of content from its presentation (XML) Rendering (XSL) based on the user agent type requesting the data
- 5. OMS Database Development Suite OM Semantic Object Data Model Application Modelling OMS Pro Rapid Prototyping System Database & Application and Lightweight DBMS Design OMS Java Data Management System Implementation & Application Framework
- 6. DB-Centric Web Site Development DB with Information Model Generic Browsers Document Content DB with Defaut Templates DB with Customised Document Templates
- 7. XML Server Component XML HTML WML Browser Browser Browser Main Entry Servlet Delegation XML + XSLT Response XML Servlet HTML Servlet WML Servlet Builds XML based on JDOM XML Server OMS Java API OMS Java Workspace
- 8. Example Types XML Response <?xml version="1.0" encoding="UTF-8" ?> <oms> <instance id="1132" type="person" > <dressedWith type="person" /> Attributes <attribute name="forename" > <string>Beat</string> </attribute> … <attribute name="picture" > <photofile>/images/ETH/beat.jpg</photofile> </attribute> Methods <method name="age" /> … <link idref="788" inv="false" name="Workplace" /> </instance> </oms> Links
- 9. Application Development 1. Prototype the OM model in OMS Pro 2. Export to OMS Java • DDL (Data Definition Language), DML (Data Modification Language) 3. Installation of XML Server with default XSL stylesheets and servlets 4. Optional customisation of stylesheets and servlets
- 10. Community Agenda
- 11. Existing Solutions Document Based Approach Data Based Approach • Conventional content • Databases brought to the management systems web • Document elements are • Close relation between stored in a DB database type and page
- 12. Content Management Server CMWorkflows CMGatekeepers CMTemplates CMComponents CMContents Application Objects
- 14. Content Management Server... CMText CMContainer CMPicture CMText CMNavigation CMContainer CMText CMPage GlobisEvent CMPicture CMMixed CMText CMMixed CMLink CMText
- 16. Conclusion • Database-Centric Web Engineering Support entire development process Manage document content and application objects • OMS Java Framework High-Level Data Management XML Server Content Management