11:03 a.m.
I need your help to put to work an accumulate function.
So, i will introduce several facts into working memory (StateEvent, which i
declare as event) and i want to accumulate the last five values.
I have changed a property in drools.default.rulebase.conf
(drools.eventProcessingMode = STREAM) to make the engine works in stream
mode.
And my rule is:
declare StateEvent
@role( event )
end
rule "Testing"
when
$total : Number() from accumulate(
StateEvent(itemName=="Temperatura", $val : newState) over
window:length( 5 ),
sum ( ((DecimalType)$val).toBigDecimal().doubleValue() ) )
then
#actions
end
But it's not working, as the value of $total is 0.0, no matter what i do,
and the rule is firing with every fact in the working memory.
Any help will be appreciated.
Thanks
12:35 p.m.
Is
((DecimalType)$val).toBigDecimal()
working correctly, given what you have in $val?
Also, check that count(1) instead of sum(...) produces the expected value.
-W
On 30/01/2012, Juanker Atina <juankera(a)gmail.com> wrote:
I need your help to put to work an accumulate function.
So, i will introduce several facts into working memory (StateEvent, which i
declare as event) and i want to accumulate the last five values.
I have changed a property in drools.default.rulebase.conf
(drools.eventProcessingMode = STREAM) to make the engine works in stream
mode.
And my rule is:
declare StateEvent
@role( event )
end
rule "Testing"
when
$total : Number() from accumulate(
StateEvent(itemName=="Temperatura", $val : newState) over
window:length( 5 ),
sum ( ((DecimalType)$val).toBigDecimal().doubleValue() ) )
then
#actions
end
But it's not working, as the value of $total is 0.0, no matter what i do,
and the rule is firing with every fact in the working memory.
Any help will be appreciated.
Thanks
3:20 a.m.
Thanks for your help.
This sentence is working properly (i've tried it out of this rule) and
count(1) doesn't give me anything.
when
Number( $total : doubleValue ) from accumulate(
StateEvent(itemName=="Temperatura", $val : newState) over
window:length( 5 ),
count ( 1 ))
then
Always returning 0.0, with every fact i put in the working memory.
Any idea?
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5:01 a.m.
If count() returns 0 then you don't have any matching StateEvent facts
in Working Memory.
- Do you enter via an entry point?
- Does a rule using
StateEvent(itemName=="Temperatura")
fire?
-W
On 31/01/2012, juankera <juankera(a)gmail.com> wrote:
Thanks for your help.
This sentence is working properly (i've tried it out of this rule) and
count(1) doesn't give me anything.
when
Number( $total : doubleValue ) from accumulate(
StateEvent(itemName=="Temperatura", $val : newState) over
window:length( 5 ),
count ( 1 ))
then
Always returning 0.0, with every fact i put in the working memory.
Any idea?
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6:05 a.m.
Hi again,
No, there isn't any special entry-point. Is that mandatory? As i've read,
there is a default entry-point, true?
About your second question, yes. All my rules are working properly. In fact
i have another rule using only StateEvent(itemName=="Temperatura") as
condition, and it's fired OK.
Do you think it could be something related to the engine invocation? (code,
not rules)
Thanks
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6:22 a.m.
On 31/01/2012, juankera <juankera(a)gmail.com> wrote:
Hi again,
No, there isn't any special entry-point. Is that mandatory? As i've read,
there is a default entry-point, true?
Correct. I was just checking to exclude a possible error (i.e., not
using the names entry-point in the rule).
About your second question, yes. All my rules are working properly. In fact
i have another rule using only StateEvent(itemName=="Temperatura") as
condition, and it's fired OK.
Last things I can think of:
- Do you declare StateEvent with @role(event)?
- Do you run the Engine in STREAM mode?
-W
Do you think it could be something related to the engine invocation? (code,
not rules)
Thanks
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7:20 a.m.
So no entry-point (using default) is OK.
I've declared this Fact as event, like this:
declare StateEvent
@role( event )
end
And I have changed a property in drools.default.rulebase.conf
(drools.eventProcessingMode = STREAM) to make the engine works in stream
mode.
I'm opening a stateful session too (newStatefulKnowledgeSession();)
Is that ok?
May i set stream mode in code like config.setOption(
EventProcessingOption.STREAM );?
May i use any specific clock type?
Thanks
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7:40 a.m.
On 31/01/2012, juankera <juankera(a)gmail.com> wrote:
So no entry-point (using default) is OK.
I've declared this Fact as event, like this:
declare StateEvent
@role( event )
end
OK - another thing excluded.
And I have changed a property in drools.default.rulebase.conf
(drools.eventProcessingMode = STREAM) to make the engine works in stream
mode.
I'm opening a stateful session too (newStatefulKnowledgeSession();)
Is that ok?
May i set stream mode in code like config.setOption(
EventProcessingOption.STREAM );?
The property setting looks OK, but who knows. Try and use this:
KnowledgeBaseConfiguration config =
KnowledgeBaseFactory.newKnowledgeBaseConfiguration();
config.setOption( EventProcessingOption.STREAM );
... kSession = newStatelessKnowledgeSession(config);
May i use any specific clock type?
window:length should not depend on the clock.
If all of this fails, you'll have to provide a complete minimum
example demonstrating the problem, and which Drools version you are
using.
-W
Thanks
9:11 a.m.
Tried, but won't work.
Ok, step by step.
1- DRL File
Event declared, FirstRule won't work and SecondRule is working properly
(neither count or sum)
declare StateEvent
@role( event )
end
rule "FirstRule"
when
Number( $total : doubleValue ) from accumulate(
StateEvent(itemName=="Temperatura", $val : newState) over
window:length( 5 ),
count ( 1 ))
then
System.out.println("" + $total);
end
rule "SecondRule "
when
StateEvent(itemName=="Temperatura", $val : newState)
then
System.out.println("" +
((DecimalType)$val).toBigDecimal().doubleValue());
end
2. Important lines from Engine starting (notice that i'm using stateful
session)
KnowledgeBuilder kbuilder = KnowledgeBuilderFactory.newKnowledgeBuilder();
kbuilder.add(ResourceFactory.newClassPathResource(RULES_CHANGESET,
getClass()), ResourceType.CHANGE_SET);
KnowledgeBaseConfiguration kbaseConfig =
KnowledgeBaseFactory.newKnowledgeBaseConfiguration();
kbaseConfig.setOption( EventProcessingOption.STREAM );
KnowledgeBase kbase = KnowledgeBaseFactory.newKnowledgeBase(kbaseConfig);
StatefulKnowledgeSession ksession = kbase.newStatefulKnowledgeSession();
3. Attached you can find the full code
http://drools.46999.n3.nabble.com/file/n3703619/RuleService.java
RuleService.java
4. Environment
Drools 5.3.0 FINAL, running on a OSGi environment.
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9:52 a.m.
Have you ever tried out to insert the events into the
WorkingMemoryEntryPoint "EventStream" directly that you have commented out
in your execute method?
and read the window from that eventstream in your rule, that is,
"window:length( 5 ) from entry-point EvenStream".
Of course, the second rule will fire also if it would be no event but a
simple fact for drools.
Unfortunately, I do not know under which condition the default entrypoint
is populated.
2012/1/31 juankera <juankera(a)gmail.com>
Tried, but won't work.
Ok, step by step.
1- DRL File
Event declared, FirstRule won't work and SecondRule is working properly
(neither count or sum)
declare StateEvent
@role( event )
end
rule "FirstRule"
when
Number( $total : doubleValue ) from accumulate(
StateEvent(itemName=="Temperatura", $val : newState) over
window:length( 5 ),
count ( 1 ))
then
System.out.println("" + $total);
end
rule "SecondRule "
when
StateEvent(itemName=="Temperatura", $val : newState)
then
System.out.println("" +
((DecimalType)$val).toBigDecimal().doubleValue());
end
2. Important lines from Engine starting (notice that i'm using stateful
session)
KnowledgeBuilder kbuilder = KnowledgeBuilderFactory.newKnowledgeBuilder();
kbuilder.add(ResourceFactory.newClassPathResource(RULES_CHANGESET,
getClass()), ResourceType.CHANGE_SET);
KnowledgeBaseConfiguration kbaseConfig =
KnowledgeBaseFactory.newKnowledgeBaseConfiguration();
kbaseConfig.setOption( EventProcessingOption.STREAM );
KnowledgeBase kbase = KnowledgeBaseFactory.newKnowledgeBase(kbaseConfig);
StatefulKnowledgeSession ksession = kbase.newStatefulKnowledgeSession();
3. Attached you can find the full code
http://drools.46999.n3.nabble.com/file/n3703619/RuleService.java
RuleService.java
4. Environment
Drools 5.3.0 FINAL, running on a OSGi environment.
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Philipp Herzig, M.Sc.
Mail: pherzig(a)googlemail.com
Cell: 0178 - 6156244
10:32 a.m.
Well, I can't reproduce the failure of "FirstRule" to fire - both
rules fire after the insertion of a single event. Of course, I use a
simplified scenario, and there are only these two rules in my
knowledge base.
Using 5.3.0 final; not OSGi, but I don't see how this should matter.
Check the
RULES_CHANGESET = "org/openhab/core/drools/changeset.xml";
Does it really refer to one DRL with just these two rules?
-W
On 31/01/2012, Philipp Herzig <pherzig(a)googlemail.com> wrote:
Have you ever tried out to insert the events into the
WorkingMemoryEntryPoint "EventStream" directly that you have commented out
in your execute method?
and read the window from that eventstream in your rule, that is,
"window:length( 5 ) from entry-point EvenStream".
Of course, the second rule will fire also if it would be no event but a
simple fact for drools.
Unfortunately, I do not know under which condition the default entrypoint
is populated.
2012/1/31 juankera <juankera(a)gmail.com>
> Tried, but won't work.
>
> Ok, step by step.
>
> 1- DRL File
>
> Event declared, FirstRule won't work and SecondRule is working properly
> (neither count or sum)
>
> declare StateEvent
> @role( event )
> end
>
> rule "FirstRule"
>
> when
> Number( $total : doubleValue ) from accumulate(
> StateEvent(itemName=="Temperatura", $val : newState) over
> window:length( 5 ),
> count ( 1 ))
> then
> System.out.println("" + $total);
> end
>
> rule "SecondRule "
>
> when
> StateEvent(itemName=="Temperatura", $val : newState)
> then
> System.out.println("" +
> ((DecimalType)$val).toBigDecimal().doubleValue());
> end
>
> 2. Important lines from Engine starting (notice that i'm using stateful
> session)
>
> KnowledgeBuilder kbuilder = KnowledgeBuilderFactory.newKnowledgeBuilder();
>
> kbuilder.add(ResourceFactory.newClassPathResource(RULES_CHANGESET,
> getClass()), ResourceType.CHANGE_SET);
>
> KnowledgeBaseConfiguration kbaseConfig =
> KnowledgeBaseFactory.newKnowledgeBaseConfiguration();
> kbaseConfig.setOption( EventProcessingOption.STREAM );
> KnowledgeBase kbase = KnowledgeBaseFactory.newKnowledgeBase(kbaseConfig);
>
> StatefulKnowledgeSession ksession = kbase.newStatefulKnowledgeSession();
>
> 3. Attached you can find the full code
> http://drools.46999.n3.nabble.com/file/n3703619/RuleService.java
> RuleService.java
>
> 4. Environment
>
> Drools 5.3.0 FINAL, running on a OSGi environment.
>
>
>
>
>
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> View this message in context:
>
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Philipp Herzig, M.Sc.
Mail: pherzig(a)googlemail.com
Cell: 0178 - 6156244
10:57 a.m.
Yes, i have only one DRL with these two rules defined.
I have actually these resources:
<resource source='file:configurations/drools/drl/' type='DRL' />
<resource source='file:configurations/drools/xls/'
type="DTABLE" >
<decisiontable-conf input-type="XLS"
worksheet-name="Tables"/>
</resource>
But only a DRL file. Anyway, i've also tried without Decision Tables and
only one specific DRL File, with no luck.
I will try again with entry-points, as Philipp suggests
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6:20 a.m.
No way, working with entry-points doesn't help. I get the same results.
Could you please help me with another clues?
Thanks.
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6:25 a.m.
Hey, i've just found this issue.
https://issues.jboss.org/browse/JBRULES-3075
Copied from third comment:
/This actually means the whole "window:length" feature can't be used at
all.
events are not cleared from memory and therefor accumulate functions
constantly return wrong results./
Is that true? Anyone using window:length out there?
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7:11 a.m.
On 01/02/2012, juankera <juankera(a)gmail.com> wrote:
Hey, i've just found this issue.
https://issues.jboss.org/browse/JBRULES-3075
A window:length was never meant to cause retraction of events.
Copied from third comment:
/This actually means the whole "window:length" feature can't be used at
all.
events are not cleared from memory and therefor accumulate functions
constantly return wrong results./
window:length works correctly in 5.3.0.
Please produce a simple, complete test-case. The code you've shown is
incomplete and can't be run.
-W
Is that true? Anyone using window:length out there?
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9:36 a.m.
I'm back again to share my last steps. Well, i think i have found what's
wrong.
First of all, I've just created a project with my drools code outside the
osgi environment. Now it's easier to read the code and test different cases.
I don't know which is the usual way to share this projects here, could you
please tell how can i package and send you the test case?
Anyway, my last tests point to a bug in 5.3.0 Final Version. I'm running the
same rules, the same code with 5.2.0 Final (accumulate working fine) and
with 5.3.0 Final (accumulate doesn't work at all).
Anyone ready to help me??
Many thanks.
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9:42 a.m.
If you are convinced that it is a bug, the normal procedure would be
for you to raise a JIRA in the Drools bug tracking system (which you
know), where you can upload files for reproducing the bug.
-W
On 02/02/2012, juankera <juankera(a)gmail.com> wrote:
I'm back again to share my last steps. Well, i think i have found
what's
wrong.
First of all, I've just created a project with my drools code outside the
osgi environment. Now it's easier to read the code and test different cases.
I don't know which is the usual way to share this projects here, could you
please tell how can i package and send you the test case?
Anyway, my last tests point to a bug in 5.3.0 Final Version. I'm running the
same rules, the same code with 5.2.0 Final (accumulate working fine) and
with 5.3.0 Final (accumulate doesn't work at all).
Anyone ready to help me??
Many thanks.
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10:28 a.m.
Ok, i have just tested again: 5.2.0 Final is working, 5.3.0 Final doesn't
work
So i will create an issue in Drools bug tracking system, as you suggest.
Many thanks for your help, happy to check that there is people replying in
this forum.
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11:02 a.m.
laune wrote
Well, I can't reproduce the failure of "FirstRule" to fire - both
rules fire after the insertion of a single event.
Sorry, i don't understand what you mean.
Are you able to put the accumulate function to work?
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4681
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18 comments
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participants (4)
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Juanker Atina -
juankera
-
Philipp Herzig -
Wolfgang Laun