NPAC Concept: Summary of Pragmatic Object Web
3-(or more)-tier architecture - Web browser front-ends, legacy (e.g. databases, HPC modules) backends; fat middleware
Use as appropriate the alternative / competing Middleware models:
- Java RMI+ EJB (Enterprise Javabean) - single language solution by Sun
- CORBA - all languages solution by OMG
- COM - multi-language solution by Microsoft
- WOM/XML - emergent solution by the Web Consortium
Each model has different tradeoffs (most elegant, powerful, fastest, simplest)
POW attempts to integrate various models and services in terms of multi-protocol middleware servers (JWORB)
- Note Java is often the best language to build middleware whether this is Java or some other distributed object model
- Most commercial Java activity is on Server not Client