Re: [rules-users] DATE-EXPIRES in rule table ?
Yes, sorry. The DefaultRuleSheetListener is limited to the documented meta-data. Have a look at the source and follow your nose (to Rule); it doesn't look too hard to add additional attributes. 2010/8/6 Arun Kumar > Thank you Michael. Sorry, I missed to mentioned in my mail that i had > referred the documentation. > I was wondering if DRL can have those attributes (like > enabled,date-expires) then how can those property be set in spreadsheet. > > Looks like currently one few attributes are supported for spreadsheet, > right ? > > Regards, > Arun > > 2010/8/5 Michael Anstis > >> The supported meta-tags are listed >> http://downloads.jboss.com/drools/docs/5.1.0.34406.FINAL/drools-expert/html_single/index.html#d4e3129 >> under >> "Table 5.3. Column header keywords to use in the RuleTable". >> >> 2010/8/4 Arun Kumar >> >>> Hi, >>> >>> Am using a spreadsheet based rules. Is it possible to set the attribute >>> like "date-expires", "enabled" >>> in the spread sheet ? >>> * >>> * >>> *Regards,* >>> *Arun* >>> * >>> * >>> >>> ___ >>> 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 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] IllegalStateException : DroolsJPAManager while calling session.dispose() method.
i am facing the above problem when i tried to integrate hibernate with drools. Anyone used hibernate with drools? If so, what is the transaction manager setting for hibernate + drools + tomcat i am trying to use the default transaction manager or the jpa transaction manager implementation from springlike the one below... but running into the above error -- View this message in context: http://drools-java-rules-engine.46999.n3.nabble.com/IllegalStateException-DroolsJPAManager-while-calling-session-dispose-method-tp1027858p1030457.html Sent from the Drools - User 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] MinaTaskClientHandler Reference Object
Thanks for your prompt response Exactly..this is what i pretty much wanted to try out... i referred to the book drools 5 dev guide... It is mentioned that I need to use MinaTaskClientHandler to retrieve task's status like claim, complete, wait e.t.c.. At this point, I am not aware of writing the own client to look for those stauses... can you please shed me some light on this with any available example of writing the own client... I appreciate your help..thx again... -- View this message in context: http://drools-java-rules-engine.46999.n3.nabble.com/MinaTaskClientHandler-Reference-Object-tp1027255p1030205.html Sent from the Drools - User 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] MinaTaskClientHandler Reference Object
Why do you need that specific client? I think you should just create your own client if you want to do operations like complete and claim? Kris - Original Message - From: "drooRam" To: Sent: Thursday, August 05, 2010 8:05 PM Subject: [rules-users] MinaTaskClientHandler Reference Object > > How can I obtain reference to MinaTaskClientHandler through drools config > tags? I mean .. we have tag for KnowledgeBase...similarly, > do > we have anything for MinaTaskClientHandler... > > I basically need to call the methods, TaskClient.claim, > TaskClient.complete > etc thro MinaTaskClientHandler.getClient(). > > Please let me know how can i obtain MinaTaskClientHandler thro config or > snippet ? > > -drooRam > -- > View this message in context: > http://drools-java-rules-engine.46999.n3.nabble.com/MinaTaskClientHandler-Reference-Object-tp1027255p1027255.html > Sent from the Drools - User mailing list archive at Nabble.com. > ___ > rules-users mailing list > rules-users@lists.jboss.org > https://lists.jboss.org/mailman/listinfo/rules-users Disclaimer: http://www.kuleuven.be/cwis/email_disclaimer.htm ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] Drools 5.1.0 install minor issue
Patricia, The build.properties in the install folder allows you to update the url and version of drools you're using. But I'll update trunk to start using 5.2 already. Thx, Kris - Original Message - From: Patricia Bogoevici To: Rules Users List Sent: Thursday, August 05, 2010 7:13 PM Subject: [rules-users] Drools 5.1.0 install minor issue Hi all, Just wanted to let know that there is a minor issue on the installation script for 5.1.0. When running the task: ant install.demo It fails with this error: drools-5.1.0/install/build.xml:158: Can't get https://hudson.jboss.org/hudson/job/drools/lastSuccessfulBuild/artifact/trunk/target/drools-5.1.0.SNAPSHOT-guvnor.war Checking the download location, the last successful build is drools-5.2.0.SNAPSHOT-guvnor.war. This is a minor issue, as one can manually download the expected war, but thought to mention it. The fix would be to use -- ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users Disclaimer: http://www.kuleuven.be/cwis/email_disclaimer.htm ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
[rules-users] Bug: ActivationCreatedEvent - Activation: InitialFactImpl in Object set
Given this rule rule "show no gaps" when not Gap() then System.out.println( "No gaps!" ); end the ActivationCreatedEvent references an Activation, where the list of fact handles (getFactHandles) contains one element, but its Object is null: Fact null @0:0:27032609:1306428912:0:DEFAULT But the list of objects (getObjects) returns a list where there *is* an object: Object (org.drools.reteoo.InitialFactImpl): org.drools.reteoo.initialfacti...@4dde85f0 I think that this should be changed; neither a fact handle nor an object should be returned if there are no user objects participating in the activation. Cheers Wolfgang ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
[rules-users] Drools Flow - Dependency Injection
Hi, I am writing a custom workItem handler in drools flow and want to access my Stateless session bean from there. I will deploy my drools project to JBoss so can I use @EJB annotation to get my stateless bean injected by jboss with in WorkItemHandler? Secondly I'll call my flow from with in a Stateless session bean. Is it ok? Or does drools use multi threading? As multi threading is not recommended to be used in EJBs? Thanks -- View this message in context: http://drools-java-rules-engine.46999.n3.nabble.com/Drools-Flow-Dependency-Injection-tp1030054p1030054.html Sent from the Drools - User 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] Edit global imports through eclipse plugin
Imports are always defined globally (i.e. at the process level). So simply opening up any expression editor and adding the imports there should allow you to add imports. Kris - Original Message - From: "drooRam" To: Sent: Thursday, August 05, 2010 8:24 PM Subject: [rules-users] Edit global imports through eclipse plugin > > how can i edit global imports in workflow rf file through eclipse > plugin... > not manually... > > I would like to add global imports to workflow file through eclipse ?? > > -drooRam > -- > View this message in context: > http://drools-java-rules-engine.46999.n3.nabble.com/Edit-global-imports-through-eclipse-plugin-tp1027368p1027368.html > Sent from the Drools - User mailing list archive at Nabble.com. > ___ > rules-users mailing list > rules-users@lists.jboss.org > https://lists.jboss.org/mailman/listinfo/rules-users Disclaimer: http://www.kuleuven.be/cwis/email_disclaimer.htm ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] Can't see process in gwt-console after changingguvnor to authenticator
Han Ming,
The gwt-console uses the authentication as defined in the ChangeSet.xml inside
the drools-gwt-console-{version}.jar in the gwt server war:
I guess you could change that or make sure the credential that is specified
here works for your configuration, would that help?
Kris
- Original Message -
From: Han Ming Low
To: Rules Users List
Sent: Thursday, August 05, 2010 10:28 AM
Subject: [rules-users] Can't see process in gwt-console after changingguvnor
to authenticator
Hi,
I'm having problems with seeing the process in gwt-console. :p
This time the difference is I change the guvnor components.xml authenticator
to "other" and role based authorization as "true" and set the login-config.xml
authentication to a users.properties
The steps and difference in setup I have made is as follows
1) change guvnor and flow persistence to mysql instead of h2
2) Build defaultPackage, ABLE to see process in Drools Flow console
3) Shutdown both human task and jboss
4) Configure role-base authorization and users.properties file authentication
5) Start human.task and jboss
6) Not able to see process in Drools Flow console
7) Rebuild defaultPackage
8) Not able to see process in Drools Flow console
9) Restart both human task and jboss
10) Not able to see process in Drools Flow console
11) Delete process in guvnor and delete archive
12) Copy process from local file system to guvnor through WebDAV
13) Build defaultPackage
14) Not able to see process in Drools Flow console
15) Shutdown both human task and jboss
16) Change login back to defaultAuthenticator.authenticate
17) Start human.task and jboss
18) ABLE to see process again
What should I do to allow the process to be seen when other authenticator is
used?
Any advice is greatly appreciated.
Thanks.
Han Ming
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Re: [rules-users] Drools 5 for process simulation
Jonathan, Drools supports a simulated clock (unified for rules and processes), so this should allow you to build a simulator. The code that Mark is referring to is just something built on top that allows you to define a simulation as a sequence of commands that are sent to the session at specific time points etc. You could try to reuse this as is if it would be useful in your case, or simply try to do something similar. In any case, there shouldn't be any technical difficulties that should prevent you from doing something like you described I think (just not all out-of-the-box). Kris - Original Message - From: Labin, Jonathan W. To: Rules Users List Sent: Wednesday, August 04, 2010 7:22 PM Subject: Re: [rules-users] Drools 5 for process simulation Mark, Thanks for the link. I'll look into it. I'm not sure I'll have time to learn enough about Drools to actually modify it for this project. Do you think it's not practical to attempt to build a simulator without modifying Drools? Thanks, Jonathan From: rules-users-boun...@lists.jboss.org [mailto:rules-users-boun...@lists.jboss.org] On Behalf Of Mark Proctor Sent: Wednesday, August 04, 2010 11:33 AM To: rules-users@lists.jboss.org Subject: Re: [rules-users] Drools 5 for process simulation On 04/08/2010 16:20, Labin, Jonathan W. wrote: Drools users, I am currently researching Drools 5 as a potential toolkit to enable my nextproject. I have read through the Documentation for Drools Expert, Flow andskimmed through Fusion and I believe that Drools looks it provides manyfeatures we need. However, I am concerned about one aspect of the way thatthe system seems to operate and was wondering if anyone could point me to asection of documentation (chapter of the manual / wiki / external how-toblog post... whatever) that will clear things up for me. I would like to use Drools Flow to define behaviors of agents as FlowProcesses to create an agent-based simulation. This application requiresthat the processes are kept synchronized with each other by a simulated(faster than real time) clock. Is there a Drools mechanism that enables this? Would I need to create a setof WorkItemHandler classes that perform the synchronization manually? Iswhat I want to do not really practical within the Drools Flow framework?I have something prototyped and it works, but I need to refactor the api and make it much simpler. so if you use it, expect it to change a lot and get a lot simpler and better :) http://blog.athico.com/2009/07/drools-simulation-and-test-framework.html Mark Thanks in advance, Jonathan Labin ___rules-users mailing listrules-us...@lists.jboss.orghttps://lists.jboss.org/mailman/listinfo/rules-users -- ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users Disclaimer: http://www.kuleuven.be/cwis/email_disclaimer.htm ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] Instructions for upgrading designer.war?
Han Ming, Here is the full list of changes that were made to the original war that is located here: http://www.intalio.org/public/maven2/com/intalio/bpms/web/designer/1.0.0.010/ Note that most of the changes in the src dir (as described below) were to get the import/export functionality of Oryx working. If you're serious about helping out, just let me know, there is lots you could help with, like improving the import/export for other cases, maybe updating to the BPMN 2.0 beta 2 format, etc. Kris -- Changes -- unzip in deploy folder, in folder designer.war in WEB-INF/web.xml, enable tomcat settings for DirectoryListingServlet removed WEB-INF/lib/javax.servlet-*.jar added slf4j-api and slf4j-jdk14 to WEB-INF/lib remove console.log statement from oryx.js replace enterprise-repository in oryx.js with drools-guvnor moved designer.war/lib/bpmn2 to designer.war/WEB-INF/lib/bpmn2 small fragment in oryx.js in construct of ORYX.Editor for setting id as uuid remove "oryx_editor_header" init + ref from Oryx.js Replace some BPMN2 import/export classes in WEB-INF/classes: de/hpi/bpmn2_0/model/FlowElement.java de/hpi/bpmn2_0/model/activity/Task.java de/hpi/bpmn2_0/model/activity/type/BusinessRuleTask.java de/hpi/bpmn2_0/model/activity/type/ReceiveTask.java de/hpi/bpmn2_0/model/activity/type/SendTask.java de/hpi/bpmn2_0/model/activity/type/UserTask.java de/hpi/bpmn2_0/model/activity/type/ManualTask.java de/hpi/bpmn2_0/model/activity/type/ScriptTask.java de/hpi/bpmn2_0/model/activity/type/ServiceTask.java de/hpi/bpmn2_0/model/diagram/BpmnNode.java de/hpi/bpmn2_0/model/gateway/ComplexGateway.java de/hpi/bpmn2_0/model/gateway/ExclusiveGateway.java de/hpi/bpmn2_0/model/gateway/InclusiveGateway.java de/hpi/bpmn2_0/model/gateway/EventBasedGateway.java de/hpi/bpmn2_0/model/gateway/Gateway.java de/hpi/bpmn2_0/model/gateway/ParallelGateway.java de/hpi/bpmn2_0/transformation/BPMN2DiagramConverter.java de/hpi/bpmn2_0/model/gateway/Diagram2BpmnConverter.java org/oryxeditor/server/EditorHandler.java org/oryxeditor/server/diagram/JSONBuilder.java - Original Message - From: Han Ming Low To: rules-users@lists.jboss.org Sent: Wednesday, August 04, 2010 12:09 PM Subject: [rules-users] Instructions for upgrading designer.war? Hi, I understand that the designer.war is a project by intalio. When looking at the source for the war at http://anonsvn.jboss.org/repos/labs/labs/jbossrules/contrib/designer/designer-src.war, I saw the changes to be made to make it compatible with Drools. I think I can do some of the steps like 1) changing the web.xml to use tomcat instead of jetty 2) added slf4j library 3) move lib/bpmn2 library to web-inf/lib 4) changes to oryx.js that involve - commenting out the header - commenting out the log - change the repository url from "/designer/uuidRepository?uuid="+ uuid to "/drools-guvnor/org.drools.guvnor.Guvnor/guvnorAPI?action=load&uuid="+ uuid However, I'm not sure what is the BPMN2 import/export classes to replace in WEB-INF/classes Can someone could tell me which are the classes? I can also help to update the designer. :) Thanks. Han Ming -- ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users Disclaimer: http://www.kuleuven.be/cwis/email_disclaimer.htm ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] Drools BPMN 2.0 service task error for process editedusing Oryx
Patricia, Note that the service task should contain an operationRef that refers to an operation defined as part of an interface in your process. The process would probably open fine if you included that element, though I must admit that it should probably be able to handle incomplete process specifications as well (but this is still work in progress, especially since Oryx is still using the old BPMN 2.0 beta1 format). Note that the service task concept in BPMN2 matches with the work item node in Drools Flow. So while the editor contains 2 predefined service tasks, is it possible to define your own, as explained in the documentation here: https://hudson.jboss.org/hudson/job/drools/lastSuccessfulBuild/artifact/trunk/target/docs/drools-flow/html/ch.Domain_Specific_Processes.html Kris - Original Message - From: Patricia Bogoevici To: Rules Users List Sent: Tuesday, August 03, 2010 9:47 PM Subject: [rules-users] Drools BPMN 2.0 service task error for process editedusing Oryx Hi all, I am using Drools 5.1 release, and I am testing the BPMN process definition created with Oryx designer. The main problem I ran into is the serviceTask element. I cannot open the process file created with Oryx designer, in Eclipse, as it complains about this error: "java.lang.IllegalArgumentException: No interfaces found at org.drools.bpmn2.legacy.beta1.ServiceTaskHandler.handleNode(ServiceTaskHandler.java:35)" Below is a snippet from the BPMN 2.0 xml file got using Oryx for serviceTask. I also attached the whole xml file, in case that help. I appreciate a lot if someone can help me with this issue, as I am practically stuck at this point. On the other hand, I noticed that Drools Eclipse workflow editor allows only for 2 types of service tasks: Email and Log. Is that a limitation of the Eclipse workflow editor, or the serviceTask is not implemented in Drools BPMN 2.0? Can I use serviceTask BPMN 2.0 element in Drools workflow? ** serviceTask from Oryx process ** Thanks in advance, Patricia -- ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users Disclaimer: http://www.kuleuven.be/cwis/email_disclaimer.htm ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] Is nested loops possible ?
I'm not sure if it is possible or not but personally I wouldn't do it.
I would have both Order and CustomerOrder as facts within your knowledge base
(and probably orderItem as well).
I would add a "total" field to Order and write a rule to maintain this value by
accumulating the itemAmount of all the orderitems. Similarly I would have
another rule on CustomerOrder to accumulate the value of the "total" of each of
the orders. When an Order is updated this would automatically trigger the
re-calculation of the CustomerOrder total.
Seperately I would have rules written against these fields which are then
trivial to write and will make it much easier to cater for future requirements
(eg in the future if customer name is "Mr Rich" then allow a max order value of
XYZ).
If you can't modify your core objects then you can also implement it by having
a separate fact which links the object (CustomerOrder or order) to the order
value) eg ValueFact (source, value).
Thomas
Ps.
It is a really bad idea to try and use doubles to store currency amounts.
Doubles do not store decimal numbers precisely, this means £0.30 may actually
be stored as 0.30004, and if you keep add £0.10 100 times you may
end up with £9.99 not £10.00. You should either use integer numbers (store
pence not fractions of pounds) or use big decimal.
http://www.velocityreviews.com/forums/t139008-java-double-precision.html shows
the problem in action.
> -Original Message-
> From: rules-users-boun...@lists.jboss.org [mailto:rules-users-
> boun...@lists.jboss.org] On Behalf Of Dinesh kumar
> Sent: 06 August 2010 11:58
> To: rules-users@lists.jboss.org
> Subject: [rules-users] Is nested loops possible ?
>
>
> Hi,
>
> I am having a problem in iterating a list inside a list.
>
> I am having the following business scenario.
>
> Public Class CustomerOrder {
>
> private String customerName;
>
> private ArrayList orderList;
>
> }
>
>
> Public Class Order {
>
> private String orderId;
>
> private String orderTime;
>
> private ArrayList orderList;
>
> }
>
>
> Public Class OrderItem {
>
> private String itemName;
>
> private Double itemAmount;
>
> }
>
>
> I need to find the total order amount for each order and the sum of all
> order.
> My rule is like individual orders should not exceed a 1 and total order
> amount of all customers should not exceed 10.
>
> For this, I need to iterate ArrayList orderList and during each
> iteration , I need to iterate ArrayList orderList. Is this
> possible in Drools ?
>
>
> I tried something like this. But it doesn't seem to be working.
> when
>
> ClaimRegistration($orderList: orderList)
>
> Number( $count : intValue > 0)
> from accumulate(Order(orderId== "order1"
> &&
> Number( doubleValue > 1 )
> from accumulate( OrderItem( $value : itemAmount),
> init( double total = 0; ),
> action( total += $value; ),
> reverse( total -= $value; ),
> result( total ) )
>
>
> ) from $orderList,count(1))
>
>
> then
>
> Sysout(",");
>
>
>
> It would be of great help if any one can give suggestions to solve this.
>
> Is nested loops possible in Drools ?
>
>
> Regards,
> Dinesh
>
> --
> View this message in context: http://drools-java-rules-
> engine.46999.n3.nabble.com/Is-nested-loops-possible-tp1029366p1029366.html
> Sent from the Drools - User mailing list archive at Nabble.com.
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[rules-users] Is nested loops possible ?
Hi,
I am having a problem in iterating a list inside a list.
I am having the following business scenario.
Public Class CustomerOrder {
private String customerName;
private ArrayList orderList;
}
Public Class Order {
private String orderId;
private String orderTime;
private ArrayList orderList;
}
Public Class OrderItem {
private String itemName;
private Double itemAmount;
}
I need to find the total order amount for each order and the sum of all
order.
My rule is like individual orders should not exceed a 1 and total order
amount of all customers should not exceed 10.
For this, I need to iterate ArrayList orderList and during each
iteration , I need to iterate ArrayList orderList. Is this
possible in Drools ?
I tried something like this. But it doesn't seem to be working.
when
ClaimRegistration($orderList: orderList)
Number( $count : intValue > 0)
from accumulate(Order(orderId== "order1"
&&
Number( doubleValue > 1 )
from accumulate( OrderItem( $value : itemAmount),
init( double total = 0; ),
action( total += $value; ),
reverse( total -= $value; ),
result( total ) )
) from $orderList,count(1))
then
Sysout(",");
It would be of great help if any one can give suggestions to solve this.
Is nested loops possible in Drools ?
Regards,
Dinesh
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Re: [rules-users] DATE-EXPIRES in rule table ?
Thank you Michael. Sorry, I missed to mentioned in my mail that i had referred the documentation. I was wondering if DRL can have those attributes (like enabled,date-expires) then how can those property be set in spreadsheet. Looks like currently one few attributes are supported for spreadsheet, right ? Regards, Arun 2010/8/5 Michael Anstis > The supported meta-tags are listed > http://downloads.jboss.com/drools/docs/5.1.0.34406.FINAL/drools-expert/html_single/index.html#d4e3129 > under > "Table 5.3. Column header keywords to use in the RuleTable". > > 2010/8/4 Arun Kumar > >> Hi, >> >> Am using a spreadsheet based rules. Is it possible to set the attribute >> like "date-expires", "enabled" >> in the spread sheet ? >> * >> * >> *Regards,* >> *Arun* >> * >> * >> >> ___ >> 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 mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] Math calculations on attributes in WHEN section of rules.
Thanks for answer. I will look for info about eval (Expert User Guide - I
know where ;) ) But, even, if this works, what with Guvnor, and GUI based
rule constructor? How can I do it with Guvnor GUI?
2010/8/6 Swindells, Thomas
> Have you looked at eval()?
>
>
>
> *From:* rules-users-boun...@lists.jboss.org [mailto:
> rules-users-boun...@lists.jboss.org] *On Behalf Of *tom ska
> *Sent:* 06 August 2010 10:49
> *To:* rules-users@lists.jboss.org
> *Subject:* [rules-users] Math calculations on attributes in WHEN section
> of rules.
>
>
>
> Hello,
> what I want to do, is to calculate on object's attributes in WHEN section
> of rule. Can I do it?
>
> For example:
>
> class CObj
> {
> private int k;
> private int n;
>
> // setters and getters
> }
>
> Now what I want to do is:
>
> rule "r1"
> when
> p : CObj ( k + n <= 1000)
> then
> System.out.println("We love Drools :)");
> end
>
> Why can't I construct conditions like in Java, or C++ (with calculations in
> conditions)? How can I achieve my goal?
>
> Thx,
> Tom.
>
> --
>
>
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Re: [rules-users] Math calculations on attributes in WHEN section of rules.
Have you looked at eval()?
From: rules-users-boun...@lists.jboss.org
[mailto:rules-users-boun...@lists.jboss.org] On Behalf Of tom ska
Sent: 06 August 2010 10:49
To: rules-users@lists.jboss.org
Subject: [rules-users] Math calculations on attributes in WHEN section of rules.
Hello,
what I want to do, is to calculate on object's attributes in WHEN section of
rule. Can I do it?
For example:
class CObj
{
private int k;
private int n;
// setters and getters
}
Now what I want to do is:
rule "r1"
when
p : CObj ( k + n <= 1000)
then
System.out.println("We love Drools :)");
end
Why can't I construct conditions like in Java, or C++ (with calculations in
conditions)? How can I achieve my goal?
Thx,
Tom.
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[rules-users] Math calculations on attributes in WHEN section of rules.
Hello,
what I want to do, is to calculate on object's attributes in WHEN section of
rule. Can I do it?
For example:
class CObj
{
private int k;
private int n;
// setters and getters
}
Now what I want to do is:
rule "r1"
when
p : CObj ( k + n <= 1000)
then
System.out.println("We love Drools :)");
end
Why can't I construct conditions like in Java, or C++ (with calculations in
conditions)? How can I achieve my goal?
Thx,
Tom.
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Re: [rules-users] Another solution for: Detecting more than 3 occurrences within 1 hour
2010/8/5 Tina Vießmann
> Thank you for this approach, Wolfgang. That sounds great. :)
> I just have some further question about your solution.
>
> #1
> I'm thinking about an approach without the need modifying things outside
> the drl file. Is something like that doable?
> Because I have to create the watcher class? (I don't expect it to be, but
> why not ask. ;))
>
The DRL language provides "declare" (see Section 4.7 in the Expert manual).
Metadata is described in the Fusion manual.
>
> #2
>
> (What and count are somewhat redundant, but this avoids clumsy patterns.)
>
> Am I right that what and count have to be defined as global variables and
> initialized using setGlobal() (from a part of the java application)?
>
No! See the Java snippet "class Watcher". (If you use declare, you'll have
to do the initializations after creation.)
>
> #3
>
> rule addEvent
> when
> $watcher : Watcher( $eventA : what, $set : valueSet )
> $eventB : Value( this after[0ms,1h] $eventA &&
> // this != $eventA && ### set
> includes Watcher.what
>
> eval(valueExceededLimit($eventB.getAlarms()) && ! $set.contains( this ) ) )
>
> I'm sorry, could you explain to me the part of $eventB in sentences,
> please? I've got confused by the comments... :(
>
If there is
a Watcher watching $eventA and with a set of related events $set,
and
a Value less than 1hr later than $eventA and with more alarms than limit and
Watcher's $set does not contain this Value
then...
The line I commented out isn't necessary as I propose to add the very 1st
event tied to the Watcher to this Watcher's list.
>
> Thank you very much! :)
>
You're welcome.
-W
> Tina
>
>
>
> Basic idea: associate a Watcher with each event.
>
> class Watcher {
>Value what;
>int count = 1;
>Set valueSet = new HashSet();
>Watcher( Value first ){
> valueSet.add( what = first );
>}
>//...
> }
>
> And now the rules:
>
> rule attachWatcher
> when
> $event : Value( eval(parameterValueExceededLimit($eventA.getAlarms())) )
> not( Watcher( what == $event ) )
> then
> insert( new Watcher( $event ) );
> end
>
> rule addEvent
> when
> $watcher : Watcher( $eventA : what, $set : valueSet )
> $eventB : Value( this after[0ms,1h] $eventA &&
> // this != $eventA && ### set
> includes Watcher.what
>
> eval(valueExceededLimit($eventB.getAlarms()) && ! $set.contains( this ) ) )
> then
> modify( $watcher ){
> setValueList( $watcher.getValueSet().add( $eventB ),
> setCount( $watcher.getCount() + 1 )
> }
> end
>
> rule testLimit
> when
>$watcher : Watcher( count > Limit )
> then
> // raise hell,
> // probably: get rid of all in $watcher.set, and $watcher
> end
>
> (What and count are somewhat redundant, but this avoids clumsy patterns.)
>
> Watcher should be declared as Event, with @expires, so they'll disappear
> with the (primary) Event each one is watching.
>
> Cheers
> -W
>
>
> 2010/8/5 Tina Vießmann
>
>> Hi,
>>
>> I'm working on thinking in Drools rules. Right now I'm trying to solve
>> this:
>> The rule shall fire if *a special event occurs more than 3 times within
>> 1 hour*.
>>
>> My *first thought of a solution* was to count the count the detected
>> events using a counter. But the counter has to be a global variable, hasn't
>> it? And global variables are not to be used to frequently, aren't they?
>> And global variables must always be initialized from outside the rules
>> file, don't they?
>>
>> Because of these thoughts I've looked for a *different solution without
>> global variables*. I came up with:
>>
>> function boolean valueExceededLimit(Set alarmSet) {
>>//
>> }
>>
>> rule "more than 3 occurs within 1 hour"
>>
>> when
>> // event #1
>> $eventA : Value(
>> eval(parameterValueExceededLimit($eventA.getAlarms())) )
>> // event #2
>> $eventB : Value( this after[0ms,1h] $eventA &&
>> this != $eventA &&
>>
>> eval(valueExceededLimit($eventB.getAlarms())) )
>> // event #3
>> $eventC : Value( this after[0ms,1h] $eventA &&
>> this != $eventA &&
>> this != $eventB &&
>>
>> eval(valueExceededLimit($eventC.getAlarms())) )
>> // event #4 -> 4 > 3
>> $eventD : Value( this after[0ms,1h] $eventA &&
>> this != $eventA &&
>> this != $eventB &&
>> this != $eventC &&
>>
>> eval(valueExceededLimit($eventD.getAlarms())) )
>>
>> then
>> // ... do something ...
>>
>> end
>>
>>
>> More than 3 is kind of a doable task. But I think of this solution as
>> heavy in case its needed to detect a larger number of events. I would be
>> thankful for other approaches to the problem.
>>
>>
>> Thanks :)
>> Tina
>>
>> _
Re: [rules-users] Drools Gunvor and Oryx integration
Hi,
The reason is that the Evaluation.bpmn is 2.0 while the version supported by
oryx is 2.0 beta.
Thus, Drools is more advance compare to oryx.
But as for running the bpmn, drools engine can still do it.
In order to have a version that will open up both in drools and oryx, you
can try the following
1) goto http://localhost:8080/designer/editor
2) create your own process
3) use the export button to either show or download a BPMN 2.0 DI XML
4) now you have a bpmn file that can be used by drools and oryx in drools
which you can upload as the Evaluation.bpmn
Hope this helps.
Han Ming
2010/8/6 Patricia Bogoevici
> Hi,
>
>
> I followed the steps provided but the Evaluation.bpmn file does not load
> correctly into the Oryx editor. Looking into the logs, it seems like Oryx
> complains because the BPMN schema namespace is different from what it
> expects. While Drools is using this: http://www.omg.org/spec/BPMN/20100524,
> Oryx editor is expecting this: http://schema.omg.org/spec/BPMN/2.0.
>
> Stack trace snippet:
> ERROR [STDERR] javax.xml.bind.UnmarshalException: unexpected element (uri:"
> http://www.omg.org/spec/BPMN/20100524/MODEL";, local:"definitions").
> Expected elements are <{
> http://schema.omg.org/spec/BPMN/2.0}activityResource
> >,<{http://bpmndi.org}activityShape>,<{
> http://schema.omg.org/spec/BPMN/2.0}adHocSubProcess
> >
> ……
>
>
> I changed the BPMN 2.0 schema for Evaluation.bpmn to match the one the
> designer expects, and imported the file manually into the designer
> (localhost:8080/designer/editor), to check if that fixed the problem. And it
> seems that fixed it, although, now I got a different error:
>
> 2010-08-06 02:29:55,482 ERROR [STDERR] java.lang.IndexOutOfBoundsException:
> Index: 0, Size: 0
> 2010-08-06 02:29:55,482 ERROR [STDERR] at
> java.util.ArrayList.RangeCheck(ArrayList.java:547)
> 2010-08-06 02:29:55,482 ERROR [STDERR] at
> java.util.ArrayList.get(ArrayList.java:322)
> 2010-08-06 02:29:55,482 ERROR [STDERR] at
> org.oryxeditor.server.BPMN2_0Importer.getJsonFromBpmn20Xml(BPMN2_0Importer.java:99)
> 2010-08-06 02:29:55,482 ERROR [STDERR] at
> org.oryxeditor.server.BPMN2_0Importer.doPost(BPMN2_0Importer.java:66)
> ……
>
>
> What I changed to Evaluation.bpmn was the root element which is now:
>
> targetNamespace="http://www.jboss.org/drools";
> typeLanguage="http://www.java.com/javaTypes";
> expressionLanguage="http://www.mvel.org/2.0";
> xmlns="http://schema.omg.org/spec/BPMN/2.0";
> xmlns:xs="http://www.w3.org/2001/XMLSchema-instance";
> xs:schemaLocation="http://schema.omg.org/spec/BPMN/2.0BPMN20.xsd";
> xmlns:g="http://www.jboss.org/drools/flow/gpd";
> xmlns:tns="http://www.jboss.org/drools";>
>
>
> I will download the source code for the designer, and try to debug this
> issue, but I wonder if any of you know what this problem is about and can
> advise on what to do next.
>
> Thanks,
>
> Patricia
>
>
>
>
> --- On *Wed, 7/28/10, Mark Proctor * wrote:
>
>
> From: Mark Proctor
> Subject: Re: [rules-users] Drools Gunvor and Oryx integration
> To: rules-users@lists.jboss.org
> Date: Wednesday, July 28, 2010, 11:26 PM
>
> On 29/07/2010 04:05, Han Ming Low wrote:
>
> Hi,
>
> Just for information.
>
> In order for the Oryx integration to work, you need to install the oryx
> designer available from
> http://anonsvn.jboss.org/repos/labs/labs/jbossrules/contrib/designer/
>
> I would add that the .war is provided by the Antoine Toulme, who maintains
> a branch at github, with the aim of merging changes back into the main oryx
> tree, and you can get the latest version there:
> http://github.com/atoulme
> http://github.com/intalio/process-designer/
>
>
>
> Install the designer.war into JBoss and make sure you can access it from
> localhost:8080/designer
>
> Then, in the download drools-5.1.0.CR1-install.zip, you should see a
> Evaluation.bpmn
> Copy this file into your Guvnor repository through WebDAV into the
> defaultPackage (note : not any other package)
> Once you have done this, you should see the process under the
> defaultPackage Processes in Guvnor.
> And when you double click on it, you should have the bpm loaded in the
> designer.
>
> A side note is that the designer will only load bpmn file, for obvious
> reason that the rf format is not supported by oryx.
> So, you cannot create a process from Guvnor and load it in the designer
> because the default type is rf.
>
> Hope this helps.
>
>
> Han Ming
>
> 2010/7/28 Patricia Bogoevici
> http://mc/compose?to=patriciabogoev...@yahoo.com>
> >
>
> Hi all,
>
> I found a preview of the Guvnor /Oryx integration here (
> http://blog.athico.com/2010/06/browser-based-bpmn2-authoring-in-drools.html
> ).
>
> I tried Drools Guvnor 5.1.0.CR1, but there is nothing about this
> integration, one can only
