A time based eviction queue is simply a queue that evicts its content based
upon time-based heuristic. So the WorkingMemoryEventListener would store
facts inserted into the WorkingMemory in an internal queue and evict them
from that queue based upon some time-based heuristic. You could use an
Execu
There isn't much support Drools provides for this. The listener tells you
about
a new Fact being inserted, and then - what? Unless you are satisfied with
a constant expiry offset, or define expiry times by a Map,Long>
or implement getExpiryOffset in all of your classes, you don't know *when*
to ret
Very true Wolfgang, and I agree your comments re: accessing meta data too.
In this case if Events are raised in response to Facts and the events
themselves expire after 5 mins; I'd assume a constant time expiration policy
on the queue to be acceptable however this is based on assumption rather
tha
Thanks for replies. Actually what I did now is I declared my fact into drl
file and then I'd added an @expires to it. It works fine but now the problem
is that for every fact inserted I'd also inserted an event for it.
Now as the drl file can be updated by user so say he'd defined expiry time
fo
Thanks. Actually I did it in different way what I did is I declared my fact
into drl file as declare MyFact and then I'd added an @expires to it. It
works fine but now the problem is that for every fact inserted I'd also
inserted an event for it.
Now as the drl file can be updated by user so say
Now that I see this code I wonder why you don't simply promote MyFact
to an event?
But, given the current situation, which removes MyEvent facts after 1m,
and assuming that you insert the MyEvent *before* its corresponding
MyFact, you can
rule "fact-without-event"
when
$f: MyFact($entity : en
Hi,
I have a process workflow where an exception might occur within one Action. I
need to react on this exception in the workflow. That means I don't want to
skip the entire processing
I just want to react properly by setting an error variable and skip this
specific item (my process iterates ov
oh yes Thanks this rule will solve my problem.
I'm wondering is there any way I can actually verify the business logic of
my rules. I'd read about drools-verifier but I've not found enough
information for it to be used with drl. I want that in some way I can check
the business logic from java cl
You can use JUnit, create a session, insert facts, call fireXY(),...
Asserting the correct result may
be done by inspecting the WM or listening to events or whatever your app
suggests.
-W
On 12 November 2010 11:45, Ayush wrote:
>
> oh yes Thanks this rule will solve my problem.
>
> I'm wonderin
Just in case anybody wonders about the effort for building a mechanism for
retracting facts based on fact attributes or other data, I outline the
solution I have implemented.
My class FactWiper implements WorkingMemoryEventListener and Runnable.
- The implementation of objectInserted( ObjectIn
Edson Tirelli wrote:
>Can you show us the stack trace? What version of Drools are you using?
I am using Drools.5.0.1.
For this accumulate:
v945 : Number ( doubleValue >= 1 ) from accumulate ( p : t_1 ( c_6 >=
20100512 && c_7 == "5" ) , count(p) )
stack trace follows:
EXCEPTION ERROR
jav
Wolfgang Laun wrote:
> The suggested workaround (before this was fixed) is to use
>count(1)
> which achieves the same effect.
> -W
Thanks a lot Wolfangm, it now works as a charm!
-Stathis
>
> On 11 November 2010 19:30, wrote:
>> Hi List,
>>
>> I'm trying to count the number of objects I ha
I believe this is fixed in Drools 5.1.1, as in 5.0.1 declared
beans where not implementing the Serializable interface. Please try
5.1.1 and let us know if you still see the problem.
Otherwise, Wolfgang's suggestion for the workaround should work as well.
Edson
2010/11/12 :
> Edson Ti
Edson Tirelli wrote:
> I believe this is fixed in Drools 5.1.1, as in 5.0.1 declared
> beans where not implementing the Serializable interface. Please try
> 5.1.1 and let us know if you still see the problem.
Unfortunately I am the final stages of my project and cannot afford to
switch Drools
I have a question for users out there working with Guvnor. Do you have
more than one user working on rules within the same package at the same
time? How are you handling versioning and testing, especially if the
changes are not going out at the same time?
We've been experimenting with Guvnor (5.
Hi all,
I am wondering if Drools Planner can handle the 8Puzzle problem. I once
resolved it with the A* search. But I do not know these simulated annealing
and tabu search that Drools Planner implements. So I am having a "Getting
stuck in local optima" problem, and depending on the start sollution
Hi All,
I would like to know how we can modify the Rules flow eclipse editor look and
feel and functionality. e.g. If we have a Embedded Sub-Process in the flow and
reduce the size of it, the arrows are still displayed in the main canvas.
Please
see the attached snapshot for reference.
How w
Hi All,
I would like to know the possible options of production level support for
Drools
Flow 5.1. Please share the links if support is available from JBoss or any 3rd
party.
Regards, Prafull
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