How to aggregate all the events which lead to the occurrence of a complex event?

Hello

Is it possible to aggregate all of the events that lead to the occurrence of a complex event in this complex event?

Let's say we have six singles events

id    amount    groupId
1     1         1 
2     0         2 
3     1         1
4     1         2
5     2         2
6     1         1

The definition of complex event is

select sum(amount), groupId from myStream[range 20 seconds slide 20 seconds] group by groupId having sum(amount) = 3

Consider that I have the following class for my complex event:

public class ComplexEvent {
    private int groupId;
    private int amount;
    private List<SimpleEvent> events;

    // getters and setters
    ...
}

Is it possible to have two complex events:

ComplexEvent1 = {groupId=1, amount=3, events=[{id=1, amount=1, groupId=1}, {id=3, amount=1, groupId=1}, {id=6, amount=1, groupId=1}]}
ComplexEvent2 = {groupId=2, amount=3, events=[{id=2, amount=0, groupId=2}, {id=4, amount=1, groupId=2}, {id=5, amount=2, groupId=2}]}

How can achieve us?

Hello

I blogged an example of solution to this type of use case since it is a common scenario in the CEP applications:

http://blogs.Oracle.com/CEP/2010/08/enriching_complex_events_with.html

There are not currently out-of-the-box support for the events of paging to disk storage. If you really more events that can fit into the Java heap, you can try persistent events of the database or a data grid, such that the consistency and by linking to the database or the cache to create the event complex containing the events of causality.

Another approach is to horizontally partition the flow of incoming events on multiple servers.

Kind regards
Seth

Tags: Fusion Middleware

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How to aggregate all the events which lead to the occurrence of a complex event?

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