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From: Humphrey B. <ce...@au...> - 2007-04-27 20:36:02
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CDPN Acquires GPS And Wireless Transportation Development Company! China Datacom Corp. Sym: CDPN Close: $0.065 CDPN, through its subsidiary "Supremacy Intl", acquired all outstanding shares in General Link Information Systems. General manages, serves and operates the only GPS vehicle monitoring and management system in China, and provides a wide range of mobile applications for the transport industry. This is HOT! It's already taking off, volume jumped through the roof Friday! Read the release and get in on CDPN first thing Monday. As a result, yet another TCP connection is established and held for the duration of this request-reply interaction. We built flexibility into the system by loosening the constraints on the system composition. As a result I think that the bar to adoption of new languages in commercial environments is quite high. The JMS API supports this concept via Message Selectors (the expressions are limited to header and property fields). This architecture is most prominently implemented in JavaSpaces. Is it valid to have multiple subsystems that communicate amongst themselves but not between each other? Subscribers can subscribe to "prod. Along the way orders can be enriched, split, aggregated, resequenced etc. Subscribers can subscribe to "prod. This implies that we need to think carefully about validating the composability as well as the actual composition of the individual processing elements. A Publish-Subscribe Channel sends a copy of a message to multiple recipients, based on the subscription preferences of the subscribers. Languages Another discussion we had at the conference was one of languages. Alternatively, we can translate the system structure into a more familiar syntax (for example, XML) and the use languages such as XPATH to execute the desired validations. Because the state of the conversation is represented by a message sitting in a specific message queue, each message queue might have to be inspected. The Transparency Illusion. After "loosely coupled", "stateless" must be a close runner-up as the ultimate nirvana in buzzword-compliant architectures. More coupling gives us efficiency and simplicity but can also introduce rigidity and brittleness. This implies that the endpoint has to have some concept of how far the conversation i |