Created attachment 1076283 [details]
Two projects that shows the issue with annotations and drl

Description of problem:

urrently to allow the engine to calculate the sliding window, we must make an explicit declaration in the DRL file, for example:

declare StockTick

    @expires( 30m )

end

Source:
https://docs.jboss.org/drools/release/6.2.0.Final/drools-docs/html/ch08.html#d0e10784

However, it should be possible using Java annotations, for example:

@Role(Role.Type.EVENT)

	@Timestamp("theTimestamp")

	@Expires("1s")

	public class MyEvent implements java.io.Serializable {

		…

	}

However, it is not working in BRMS 6.1.

Version-Release number of selected component (if applicable):

N/A

How reproducible:
Always.

Steps to Reproduce:
1. Create a Java object as an event and use the annotations Timestamp and expire to declare the sliding window for this event
2. Use Stream mode for event processing
3. Put a few events in the working memory, which should be retracted according to the rules you set using the expire annotation

Actual results:
The events will not be retracted after it reaches the expiration time.

Expected results:
The events should be retracted.

Additional info:
The same concern can be found in this community thread:

http://stackoverflow.com/questions/30257724/memory-decline-when-use-drools-stream-mode

And other community users have discussed the use of these annotations in Java files in this other community thread:

https://groups.google.com/forum/#!searchin/drools-usage/@Timestamp/drools-usage/YmZE_wlZUnw/twmS0KGYzD4J


Attached to this case you can find a test case provided by customer that shows the issue when only using annotations.