Re: [rules-users] Custom Operator - 5.4.0 works but nor not in 5.6.0.
What you write about the error message is not consistent. A "casr to
String" cannot produce an error message "cannot cast primarySite to a
FactHnadle".
-W
On 14/02/2014, mattmadhavan wrote:
> Hello,
> I have written a drools custom operator called inlist. It takes two strings
> are parameters and works great in 5.4.0.
>
> I can do some thing like this.
>
> rule inList_1
> dialect "mvel"
> when
> $cp3rRecord : Cp3rRecord (*primarySite*e inlist ("C500-C505") )
> then
> System.out.println ("Fired inList_1");
> end
>
> where primary site is a filed of the type Cp3rRecord and it works great in
> 5.4.0
>
> There is a change in the API from 5.4.0 to 5.6.0
>
> The Old evaluator is:
>
>
> /The new one (Per 5.6.0) is/
>
>
> Note the third parameter! its is changed from Object to a Fact handle
> (*Please see lines 1) and 2)* )
>
> When I extract the Object its returning me the FACT again and it blows off
> when I cast it to String. Any ideas please> I have been stuck on this for a
> day!
>
> I am getting the exception *cannot cast primarySite to a FactHnadle
> *
>
> Can some one throw some light on this one please?
>
> Thanks in advance!
>
> Matt'M
>
>
>
>
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[rules-users] Help with event not found over window query
Hi there, I'm a drools newbie and I wonder if someone could help me. I'm using drools 6.0.1 and I'm trying to write a rule that fires when: 1) a certain event is seen and 2) a second event is not seen within a certain period of time (1 minute in the examples below) after the first event is seen I have tried the following LHS patterns: rule "Something" dialect "mvel" when $e1: Event($location: properties["location"] && ...) not Event(, this after $e1) then //do stuff end rule "Something" dialect "mvel" when $e1: Event($location: properties["location"] && ...) not Event(, this after[0, 1m] $e1) then //do stuff end rule "Something" dialect "mvel" when $e1: Event($location: properties["location"] && ...) List (size == 0) from collect (Event(..., this after $e1) over window:time(1m)) then //do stuff end rule "Something" dialect "mvel" when $e1: Event($location: properties["location"] && ...) List (size == 0) from collect (Event(...) over window:time(1m)) then //do stuff end The unwanted behaviours are as follows: In the first case, the rule fires immediately after the first event is inserted. In the second case, the rule fails to fire if the second event is seen (as expected) but the rule does not fire if the second event is not seen within 1 minute. In the third and fourth cases, the rule fires immediately after the first event is inserted. Event is a java class with a hash map of properties, defined with the following metadata: declare Event @role(event) end I would really appreciate if someone could help me out here. Thanks and let me know if you need any more info. Dave -- View this message in context: http://drools.46999.n3.nabble.com/Help-with-event-not-found-over-window-query-tp4028129.html Sent from the Drools: User forum mailing list archive at Nabble.com. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] ArrayIndexOutOfBoundsException under high events load in drools CEP
Hi, I suggest to use a persisted session instead of doing the marshalling on your own. Find documentation about it here: http://docs.jboss.org/drools/release/5.5.0.Final/drools-expert-docs/html_single/#d0e3961 Note that it is strongly discouraged (and in the next releases will be totally disallowed) to use persisted sessions with firUntilHalt. What you could do to workaround this further limitation is keeping the WorkingMemoryEventListener and invoke fireAllRules in its callbacks. I hope this helps, Mario -- View this message in context: http://drools.46999.n3.nabble.com/ArrayIndexOutOfBoundsException-under-high-events-load-in-drools-CEP-tp4028071p4028128.html Sent from the Drools: User forum mailing list archive at Nabble.com. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] java.lang.NullPointerException when using a custom operator
Hi Davide, The problem occurs here at my evaluator! Please note lines 1 and 2 and the third parameter to the evaluate function! It has changed from *'Object' *to *'FactHandle' *from 5.4.0 to 5.6.0. The first step return back the same factHandle object so the Casting fails on step 2). Please note that this works just fine in 5.4.0. The error is: Any help on this issue is greatly appreciated! Thanks in advance! Matt'M So the second step fails w -- View this message in context: http://drools.46999.n3.nabble.com/rules-users-java-lang-NullPointerException-when-using-a-custom-operator-tp4025287p4028127.html Sent from the Drools: User forum mailing list archive at Nabble.com. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
[rules-users] Custom Operator - 5.4.0 works but nor not in 5.6.0.
Hello,
I have written a drools custom operator called inlist. It takes two strings
are parameters and works great in 5.4.0.
I can do some thing like this.
rule inList_1
dialect "mvel"
when
$cp3rRecord : Cp3rRecord (*primarySite*e inlist ("C500-C505") )
then
System.out.println ("Fired inList_1");
end
where primary site is a filed of the type Cp3rRecord and it works great in
5.4.0
There is a change in the API from 5.4.0 to 5.6.0
The Old evaluator is:
/The new one (Per 5.6.0) is/
Note the third parameter! its is changed from Object to a Fact handle
(*Please see lines 1) and 2)* )
When I extract the Object its returning me the FACT again and it blows off
when I cast it to String. Any ideas please> I have been stuck on this for a
day!
I am getting the exception *cannot cast primarySite to a FactHnadle
*
Can some one throw some light on this one please?
Thanks in advance!
Matt'M
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Re: [rules-users] real world examples wanted
What sort of thing are you looking for? Open source demos with source code? Proprietary applications? I have a few trivial examples of web applications with REST services in GitHub. Also, I have a few works in progress in private repos built around v6. Due to be de-privatised when I get them to a point where they hang together somewhat better than they do right now. Not so sure about real-world proprietary stuff though. I have a client who use something I built as part of their sales pitch to potential clients, so they may be up for a few anonymised screenshots to be part of a presentation. That’s using 5.3 though. Steve On 14 Feb 2014, at 15:18, Mark Proctor wrote: > Real wold examples wanted. If you can help, please let us know. > > We have a large user base now, and over the years a number of people have > said they would help with contributing real world examples. Alas after 10 > years, except for the small banking example, we are still waiting for a > single user example contribution. > > Mark > > > ___ > rules-users mailing list > rules-users@lists.jboss.org > https://lists.jboss.org/mailman/listinfo/rules-users ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
[rules-users] real world examples wanted
Real wold examples wanted. If you can help, please let us know. We have a large user base now, and over the years a number of people have said they would help with contributing real world examples. Alas after 10 years, except for the small banking example, we are still waiting for a single user example contribution. Mark ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] java.lang.NullPointerException when using a custom operator
Could you please show the stack trace of the exception and the rule that causes it? Thanks Davide On 02/14/2014 02:38 AM, mattmadhavan wrote: > Hello, > I am having a hard time with a custom operator. It works great in 5.2 but > not in 5.6. Do you mind sharing your email ample for 5.6 please? I spent > the whole day today on this issue. > There are Any differences between a 5.2 5.6 and 6.0.x. > > Your example works great for 6.0.x btw. > > Thanks in advance.! > > Matt > > > > -- > View this message in context: > http://drools.46999.n3.nabble.com/rules-users-java-lang-NullPointerException-when-using-a-custom-operator-tp4025287p4028110.html > Sent from the Drools: User forum mailing list archive at Nabble.com. > ___ > rules-users mailing list > rules-users@lists.jboss.org > https://lists.jboss.org/mailman/listinfo/rules-users > ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] irrational behaviour by drools engine
Hi, am sorry i wasnt able to understand your solution. will you be able to simply it ? What if i push my maps as facts? Will it be too heavy ? 1 more thing. if I have 2 maps of different types in facts then how can i access the object from a particular map. I mean say i have 2 maps says map_1 holding objects of obj_1 and map_2 holding objects of obj_2 and i insert fact of type factObject. Then how can i get objects from obj_1 using a property of factObject then compare it and if it is true then i try to get object from map_2 using factObject -- View this message in context: http://drools.46999.n3.nabble.com/irrational-behaviour-by-drools-engine-tp4028104p4028122.html Sent from the Drools: User forum mailing list archive at Nabble.com. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] irrational behaviour by drools engine
Ok, I think I'm starting to understand. Could you create another fact object
that is a pair of encapsulating objects, one that is inserted, and another
that you retrieve from your global?
It would look something like:
public class EncapsulatingObjectPair {
EncapsulatingObject a;
EncapsulatingObject b;
//getters setters etc..
}
And then you'd have a rule that looks like this:
WHEN
$object : EncapsulatingObject($key : id)
THEN
insert new EncapsulatingObjectPair($object,
encapsulationMap.get($key+""));
END
And a second rule that looks something like:
WHEN
EncapsulatingObjectPair(secondEncapsulatingMap != null)
THEN
do something..
END
I haven't tried to compile this.. but the general idea is there.
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Re: [rules-users] irrational behaviour by drools engine
Yeah, sorry I'm too used to having drools.removeIdentities set to true. Otherwise yes, you'd need to put a check in to ensure it's not the same fact. -- View this message in context: http://drools.46999.n3.nabble.com/irrational-behaviour-by-drools-engine-tp4028104p4028120.html Sent from the Drools: User forum mailing list archive at Nabble.com. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] irrational behaviour by drools engine
Hi, I cannot do that. This map is not a normal *hashmap is gemfire region *as i have mentioned. It is used to commnunicate with gemfire. So when i say i have fact and when I say map.get(fact). its gemfire hitting its region. It gets object for me from gemfire. *Gemfire is a database engine*. so when i say EncapsulatingObject($key : id) it is going to assign value of id to $key. It is from fact. using this value as key i fetch it from map which is my gemfire region. *For time being since i am exprementing i am converting this $key as string to fetch it from map */else in real map all the values will be of type EncapsulatingObject and all of its keys will also be of type EncapsulatingObject/ After i obtain my object from gemfire i will use its properties to match my condition. *This region actually holds millions of data* so i cannot copy this data to my jvm and use it I am trying to simulate some things for its possibility before i use it in my development code. -- View this message in context: http://drools.46999.n3.nabble.com/irrational-behaviour-by-drools-engine-tp4028104p4028119.html Sent from the Drools: User forum mailing list archive at Nabble.com. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] irrational behaviour by drools engine
On 14/02/2014, rjr201 wrote: > I still don't fully understand what you are trying to do, but could you > maybe > try inserting each object in your hashmap as a fact rather than having a > global hashmap. Your rule would then look something like: > > WHEN >EncapsulatingObject($id : id) >EncapsulatingObject(id == $id) > THEN >Do something.. > END > > This rule simply checks if there are two encapsulatingObjects with the same > id. No, it doesn't - it wlll fire if there's just one EncapsulatingObject, because that'll have an id equal to its own id. And it'll fire for any other EncapsulatingObject...# -W > > > > -- > View this message in context: > http://drools.46999.n3.nabble.com/irrational-behaviour-by-drools-engine-tp4028104p4028116.html > Sent from the Drools: User forum mailing list archive at Nabble.com. > ___ > rules-users mailing list > rules-users@lists.jboss.org > https://lists.jboss.org/mailman/listinfo/rules-users > ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] irrational behaviour by drools engine
Fact is in real i have multiple rules who share same Maps. hence i have kept it global. There are multiple maps. I have data as facts. This facts are to be compared with that of map. this facts are also used as Key in those Maps. I am not inserting objects in map. My map is not going to be modified. I am only checking facts with map. If I find value in map (which is also an object of Encapsulation type) then i check for other properties. If it matches my condition then i insert it into a list (for now i am only printing it on console). /Just adhoc question can i compare values from 2 different properties of different type of objects ?/ Am i clear ? -- View this message in context: http://drools.46999.n3.nabble.com/irrational-behaviour-by-drools-engine-tp4028104p4028117.html Sent from the Drools: User forum mailing list archive at Nabble.com. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] irrational behaviour by drools engine
I still don't fully understand what you are trying to do, but could you maybe try inserting each object in your hashmap as a fact rather than having a global hashmap. Your rule would then look something like: WHEN EncapsulatingObject($id : id) EncapsulatingObject(id == $id) THEN Do something.. END This rule simply checks if there are two encapsulatingObjects with the same id. -- View this message in context: http://drools.46999.n3.nabble.com/irrational-behaviour-by-drools-engine-tp4028104p4028116.html Sent from the Drools: User forum mailing list archive at Nabble.com. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] irrational behaviour by drools engine
Thanks for your response. I will try to explain as much as i can if you have
any doubts then let me know
I am actually simulating a live process with gemfire.
So we have Maps( which are nothing but regions of gemfire). I try to
retrieve data from this Map using map.get. This data needs to be compared
with other Maps. I have facts which are used to retrieve data from Map if
they are present. In example that i have given I am hardcoding id == 7 for
testing because i am getting this wierd behaviour. So this facts are used as
keys of maps and data found in other maps.
If it satisfies my condition then i have list in which I insert those fact
objects.
Also Map objects and fact objects are actually of type EncapsulatingObject .
java version 6
Drools 5.5
public class EncapsulatingObject {
private int id;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public int hashCode_() {
final int prime = 31;
int result = 1;
result = prime * result + id;
return result;
}
public boolean equals_(Object obj) {
if (this == obj)
return true;
if (obj == null)
return false;
if (!(obj instanceof EncapsulatingObject))
return false;
EncapsulatingObject other = (EncapsulatingObject) obj;
if (id != other.id)
return false;
return true;
}
}
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Re: [rules-users] irrational behaviour by drools engine
That's a *very* weird combination of globals and facts. However, it could be a bug. Drools version? A complete set of Java classes? -W On 14/02/2014, rjr201 wrote: > Hi, > > Can you give a bit of a broader explanation of what it is your rule is > trying to achieve? I suspect there is a simpler, way of doing what you want > without having to resort to using eval. > > For example, EncapsulatingObject(encapsulationMap[$key+""] !=null) is very > confusing. > > Please explain your requirement in detail. > > > > -- > View this message in context: > http://drools.46999.n3.nabble.com/irrational-behaviour-by-drools-engine-tp4028104p4028113.html > Sent from the Drools: User forum mailing list archive at Nabble.com. > ___ > rules-users mailing list > rules-users@lists.jboss.org > https://lists.jboss.org/mailman/listinfo/rules-users > ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] irrational behaviour by drools engine
Hi, Can you give a bit of a broader explanation of what it is your rule is trying to achieve? I suspect there is a simpler, way of doing what you want without having to resort to using eval. For example, EncapsulatingObject(encapsulationMap[$key+""] !=null) is very confusing. Please explain your requirement in detail. -- View this message in context: http://drools.46999.n3.nabble.com/irrational-behaviour-by-drools-engine-tp4028104p4028113.html Sent from the Drools: User forum mailing list archive at Nabble.com. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] calling function in When which one is faster
NO, I did NOT mistype. But I also wrote "probably". Your three alternatives aren't even exchangeable. For a serious discussion, provide a complete code example with true, exchangeable alternatives and then one might benchmark. The myth that eval is "the slowest of all possibilities" is due to imprecise statements from people not taking enough time to write. The truth is that constraints where indexing is possible are faster than anything else. Among the runners-up, it depends on the complexity of the inner workings, which depend on the CE type and may vary between versions. eval() is just a simple boolean expression, akin to any regular constraint where indexing does not apply. Whether JITting or some interpretation applies also depends on the Drools version and what not, so, once more: only benchmarking tells you hard facts. -W On 14/02/2014, wtang wrote: > Sorry, just double check to see if you miss typed -- > > Do you mean eval() is the slowest and has the most overhead? > > Your reply seems to say opposite and said that eval() is the faster and > have > the least overhead. > > You really meant eval() is the slowest and has the most overhead right? > > thx! > > > > -- > View this message in context: > http://drools.46999.n3.nabble.com/calling-function-in-When-which-one-is-faster-tp4028076p4028111.html > Sent from the Drools: User forum mailing list archive at Nabble.com. > ___ > rules-users mailing list > rules-users@lists.jboss.org > https://lists.jboss.org/mailman/listinfo/rules-users > ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
