Hi, What I was implying by point 1 was this - Yes it was message content filtering as Bob said but additionally, some useful information could be directed back to the publishers and other potential publishers which would help them reach out to a yet wider set of subscribers. Furthermore, point 3 conveyed that if it were logical to discover hubs (hubs full of such useful information derived from message content filtering), a potential publisher would come to know well about all the trending topics at a given hub (from my limited experience on enterprise integration, i understand that publishers and subscribers generally agree upon topics but on the web, you may have a to-be publisher wanting to know what are the trending topics). Lastly, a Hub could convey topic trends in its vicinity to networked hubs.
I do not intend to touch the spec. in any way, but if someone feels that a publisher may gain positively from knowing the topics-in-trend at a given hub or a networked hub, please let me know your thoughts. This is especially possible considering shared logical hubs. (I'm glad point 2. was not taken further). Best regards, Niranjan ---------------------------------- On Tue, Aug 24, 2010 at 11:15 PM, Bob Wyman <[email protected]> wrote: > On Aug 23, 1:00 pm, Niranjan <[email protected]> wrote: > > 1. Can Hubs be engineered to understand the message-content they > > handle? > PSHB as currently defined is a "topic-based" PubSub system. In PSHB, > you subscribe to a stream of data that is published to a particular > "topic" or within a named feed. It appears that what you're asking for > is, in part, for PSHB to be extended to also support "content-based" > PubSub -- or, the ability to subscribe to filtered streams of data > where the filtering is performed on the content of the message, not > merely on the name of the topic to which the data was published. Given > that PSHB is already topic-based, my assumption is that you would want > content-based filtering within streams of data which would correspond > to the existing Topics. Thus, you're asking for a hybrid system that > implements content-based filtering over topics. I recently wrote a > note proposing precisely this. Take a look the following and consider > providing your thoughts: > > http://groups.google.com/group/pubsubhubbub/browse_thread/thread/2fdbd65bbb8602c8# > > bob wyman >
