alek blogs

How to do two way, p2p, symmetrical web using asymmetrical pull ...

In RSS: Promise and Peril Tim Bray talks about use of RSS providing notification mechanism to track state changes of Web services such as credit card transactions, weather, traffic reports, sales tracking, ...

This is very useful but what caught my attention is that by using RSS pull mechanism (or similar approaches that are asymmetrical) we may finally achieve p2p functionality (symmetry) that long time ago was promised with ubiquitous IP address (Internet enabled toaster anyone?). This makes sense for clients behind firewalls and other NATs i.e. majority of Internet users, clients that have no public IP address (asymmetrical web ?). Now the problem is really who will pay for it: how to stream commercials in RSS?

NOTE: this is how i designed event/message notification in XEvents/XMessages, to provide maximum flexibility it is based on pulling events matching filters, and application that is pulling may maintain token to allow to recover from disconnections (similar but more powerful than ETag).

created Fri 20 June 2003 7:18 PM EST [2003/6/20 19:18 EST] permalink

WSE2 younger brother of WSIF?

(...)Ok, so let's start to talk about the product: It is about SOAP Services. Actually, they still call it Web Services but in fact, it has nothing to do with the web at all. It is only about SOAP anymore - and it is only about SOAP as a framing format anymore. Frankly, I think that this is a very good thing: using HTTP in your mission critical applications might not be the best idea. Wouldn't it be way cooler if you could just take an XML document, wrap it in a SOAP envelope and send it over whatever reliable protocol you like? While still using all WS-* and GXA specifications?

this desription of WSE2 sounds like what WSIF except that WSIF has support for industry standards such as CORBA/IIOP and does not require to send SOAP envlopes.

However the problem with WSIF that it is only client side ...

created Wed June 25, 2003 10:20 PM EST [2003/6/25 22:20 EST] permalink

Beyond J2EE and Jini is ... ?

Talip Ozturk writes about J2EE and Jini and what is relationship between them:

(...)They are not truely competing technologies rather complementary technologies. if you are writing a J2EE server, you can use Jini's dynamic, self healing features. if a Jini service needs to persist data in a way that entity beans does, then the Jini service can make use of a J2EE server to do that. if you are writing JMS implementation, you might want to leverage Jini JavaSpaces technology. JNDI might internally be interfacing with Jini Lookup Service to gain some dynamic behaviour.(...)

I think that distributed computing is changing with advent of Web Services and in particular Grids. The feature may be something like distributed container that is dynamically created from available services (similar to Jini but on Internet scale) that guaranteed to have all required resources such as performance, bandwidth, transactions etc. as described in SLA, QoS, ... (in this respect it is meeting and superseding requirements of J2EE).

Anyway only future can really tell and some technologies seem to stay longer (or shorter) than predicted.

created Sat June 28, 2003 4:40 PM EST [2003/6/28 16:40 EST] permalink

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