1. PyEDA Python Event Driven Architecture By Abe Usher

2. Outline What is an event-driven architecture? Why PyEDA?
PyEDA architecture
PyEDA logic
PyEDA examples
Future work

3. What is an event-based architecture?
Application development focused on detecting, analyzing, and reacting to conditions in information repositories in near real-time
Event: a condition within a dataset that can be evaluated as true or false (e.g. 5 is an integer that falls within the range 1-10)

4. Why PyEDA?
The information “sense and respond” cycle must be very fast in the cyber realm
PyEDA facilitates quick creation of ad-hoc monitoring of special events
Knowledge workers cannot possibly watch and interpret all incoming data streams for hundreds of conditions
Intelligent automation of event detection provides knowledge workers with more time for their primary function: analysis
I have created a GPLed application that facilitates event-drive architecture. This framework is instantiated in the application PyEDA.

5. Hype vs. reality
Hype:
“An event processing language is an essential element in developing event driven business solutions. This really is the next big thing.” Roy Schulte, VP of Research at Gartner group
“Real time intelligence is information delivered now based on rapidly occurring changes inside and outside the enterprise” from iSpheres.com Web site
Reality:
“Real time” and near real time processing is not the solution for all problem domains. However, commercial companies that employ real time data analysis (Wal-Mart, Dell) enjoy huge competitive advantages over their competitors.
IT enterprises can realize substantial time savings, operational efficiencies, and knowledge discovery through the application of event driven architectures.

6. PyEDA logical architecture

7. PyEDA architecture terms
Event source: a data repository that can be queried by automated means
Event monitor: a software agent that continuously checks for the existence of special events
Event catalog: collection of event metadata in XML format that includes event conditions and responses
Event log: a text log file in syslog format of all event monitor actions
Event notification (destination): an entity that receives data as a result of an event being detected

8. PyEDA logic Execute Event Monitor: Loop forever: For each alert:
Is the time_since_last_check > check_interval?
If no: wait
If yes: log * check for alert condition:
Reset time_since_last_check to now
If alert condition does not exist:
(log and wait)
If alert condition does exist:
(log and alert)

9. PyEDA physical architecture
Each red box is a separate physical system

10. Future work Finish implementing PyEDA GPL source code
Create demonstration application of PyEDA with MySQL
Create demonstration application of PyEDA with MS-SQL

11. PyEDA examples
(TBD)