Stream Processing

1. Simple Event Processing
   Simple filter (e.g. is this gold or platinum customer)
2. Event Stream Processing
   Looking across multiple event streams and joining multiple event, etc
3. Complex Event Processing
   Processing multiple event stream to identify meaningful pattern, using complex condition & temporal windows
   e.g . There has been a more than 10% increase in overall trading activity and the average price of commodities has fallen 2% in last 4 hour