Py. EDA Python Event Driven Architecture By Abe Usher (abe. usher@sharp-ideas. net)
Outline What is an event-driven architecture? ¢ Why Py. EDA? ¢ Py. EDA architecture ¢ Py. EDA logic ¢ Py. EDA examples ¢ Future work ¢
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)
Why Py. EDA? ¢ The information “sense and respond” cycle must be very fast in the cyber realm ¢ Py. EDA 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 eventdrive architecture. This framework is instantiated in the application Py. EDA.
Hype vs. reality ¢ Hype: l “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 l “Real time intelligence is information delivered now based on rapidly occurring changes inside and outside the enterprise” from i. Spheres. com Web site ¢ Reality: l “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. l IT enterprises can realize substantial time savings, operational efficiencies, and knowledge discovery through the application of event driven architectures.
Py. EDA logical architecture
Py. EDA 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
Py. EDA logic Execute Event Monitor: ¢ Loop forever: ¢ l 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)
Py. EDA physical architecture Each red box is a separate physical system
Future work Finish implementing Py. EDA GPL source code ¢ Create demonstration application of Py. EDA with My. SQL ¢ Create demonstration application of Py. EDA with MS-SQL ¢
Py. EDA examples ¢ (TBD)
Скачать презентацию Py EDA Python Event Driven Architecture By Abe
ff078f83bf611c79a5d62c2b7330ede3.ppt