One more video of a talk I gave at OW2Con 2012 about a research project I am working on since two years now called Play (and not the play framework…).
"The PLAY project develops an elastic and reliable architecture for dynamic and complex, event-driven interaction in large highly distributed and heterogeneous service systems.
Such an architecture will enable ubiquitous exchange of information between heterogeneous services, providing the possibilities to adapt and personalize their execution, resulting in the so-called situational-driven process adaptivity…"
Here is the video of a quick talk I gave two weeks ago at OW2Con 2012 dealing with Petals Enterprise Service Bus.
He gives some background about what is Petals, how it can be used, why it is a distributed runtime, what is really new in the last version and finally what is planned in the next version.
I already spent many time explaining what we have in mind to push Petals in the cloud and this will be a reality in the next months as we are currently working on that exiting feature. More information soon, for real this time!
You are right, I need to smile more, be less tired and have a demo of the BPM editor working on low resolution displays… BTW, the demo of the DSB Monitoring & Management console used to deploy and monitor BPEL process works.
Last week was the first annual review meeting of the Play project I work on since one year. I am involved at several levels in this project: from the architecture point of view, to the software integration and quality ones. On my side, my goal is to provide the efficient software infrastructure for events actors, or how to build an Event Driven Architecture based on Petals Distributed Service Bus. There are others points which have to be developed, especially all the platform governance stuff and Service Level Agreement for events, what we call Event Level Agreement.
We showed several things to the European Commission reviewers and we were also able to show an early prototype (this one was originally planned to be show at mid project ie in 6 months…). I made a video capture of the demo, which really needs to be explained…
There is the idea of a market place for events : The event marketplace. From there users are able to subscribe to things they are interested in. For now it is just a simple Web application which subscribe on behalf of the user to events through topics. This subscription is sent to the Play paltform using Web standards. Here we use OASIS Web service Notification to create this communication link.
Events are collected from several sources by events adapters. In the video above, we can see the user setting this FB status which is collected by the Play system and transformed into a notification which is published to the platform. There are also some Twitter adapters and Pachube ones which collects data in real time and publish them to the platform. This time again, we use Web standards for adapters communication.
Now, what happens in the video? The user logs in to event marketplace and subscribes to FB events. The user then publishes something to its FB wall (note that it is not mandatory to have the same user in the event marketplace and in FB. A user can subscribe to FB events and receive events from all the FB statuses collected from the FB application users). After the event propagation delay, the event marketplace display the event to the user.
So do we need such machinery to do things like that? No, if you want to do some other simple mashup portal. There are several components which are under active development: Storage and processing. Yes we store all events in the Play platform. This storage will be huge, but it is one of the project goal: Providing efficient and elastic storage in some P2P way. The need for this storage comes with the other important aspect of the project: Complex Event Processing. We will soon be able to create complex rules on top of events and be able to generate notifications based on past and real time notifications because we have efficient storage and real time stuff inside the platform. I am not an expert of this domain, so I can not give more details about that point but capabilities are huge! For example, we can express something like "Hey Play, can you send me a SMS me when there is my favorite punk rock band playing just around and I am not on a business trip and X and !Y or Z". All of this intelligence coming from the processing of various sources I push since months in the platform coming from Twitter, FB, last.fm and other data providers.