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3-(or more)-tier architecture - Web browser front-ends, legacy (e.g. databases, HPC modules) backends; fat middleware
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| 2 |
Use as appropriate the alternative / competing Middleware models:
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Java RMI+ EJB (Enterprise Javabean) - single language solution by Sun
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CORBA - all languages solution by OMG
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COM - multi-language solution by Microsoft
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WOM/XML - emergent solution by the Web Consortium
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| 3 |
Each model has different tradeoffs (most elegant, powerful, fastest, simplest)
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| 4 |
POW attempts to integrate various models and services in terms of multi-protocol middleware servers (JWORB)
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Note Java is often the best language to build middleware whether this is Java or some other distributed object model
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Most commercial Java activity is on Server not Client
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