Daniel =?iso-8859-1?Q?L=E1zaro?= Cuadrado <[EMAIL PROTECTED]> writes:
Hi everybody!
I would like to know whether you have ever considered to use the Infobus
technology within Ptolemy II and if so, what was the result (if there is
any useful applicability of it to the projet, why or why not).
Thanks a lot!
----
http://java.sun.com/products/javabeans/infobus/
says:
InfoBus enables dynamic exchange of data between JavaBeansTM component
architecture by defining a small number of interfaces between
cooperating Beans and specifying the protocol for use of those
interfaces. The protocols are based on a notion of an information
bus. All components which implement these interfaces can plug into the
bus. As a member of the bus any component can exchange data with any
other component in a structured way, including arrays, tables, and
database rowsets.
I'm not very familiar with InfoBus, but it looks like InfoBus uses
some sort of dataflow semantics as opposed to event driven semantics.
http://esuite.lotus.com/devsite/devsite.nsf/Linking+View/eSuite+InfoBus+Technology+Brief
says:
The InfoBus is similar to a hardware bus. Multiple consumers can
receive and use data published by a producer, and a consumer can
easily obtain data from multiple producers. In fact, a request for
data can elicit multiple responses. Multiple conversations can occur
simultaneously without requiring anything special from the
participating components.
When we were first developing Ptolemy II, we looked at Java beans in
general, and sort of wondered what the model of computation was.
Classic Java Beans are sort of event driven. I'm not sure
what can be said about determinacy.
I'm not sure if InfoBus was around when we started in on Ptolemy II.
Ptolemy II is a framework for developing models that use various
models of computation. For example, I'm not sure how we would use
InfoBus to implement continuous time semantics.
InfoBus looks interesting though, we should take a good look at it.
-Christopher
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