Re: [rules-users] Is work item configuration needed at run time? Can it be built programmatically?
Mike, The work item definitions file is only used in the graphical editor, to add custom nodes to the palette. It is not used at compile or runtime, as the variable definitions etc. are all part of the work item itself. So you probably don't need it in your environment. Kris Quoting msully msull...@yahoo.com: Hi folks, I'm trying to use Drools Flow in a Spring DM environment. I've OSGified its jars and things look promising. The thing is, I want to use Work Items for my domain interface, and I want WorkItemHandler's to come from the service broker. I can see how most of this would work, except for reading in the workDefinitions.conf for a new work item. I've down a quick browse through the source code and I think it might be that I don't need the work item configuration file during run time, just for visual rule building. Anyone know if that is true? If it is needed, is there an API that I can introduce it into while building the session, the way I can introduce KnowledgePackages/rules files? Thanks, mike -- View this message in context: http://www.nabble.com/Is-work-item-configuration-needed-at-run-time---Can-it-be-built-programmatically--tp24079237p24079237.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
[rules-users] Traversing the Rete Network
Hello, I am trying to find out if and why a rule is not activated/fired when asserting a piece of data. At the moment I am using JBoss AOP to pointcut the method EntryPointNode.assertObject(), and from there I run an algorithm to walk to every node in the rete network. My question is how can I be sure that I have indeed accessed every node in the network? Thanks for your help. Regards, Peter ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
[rules-users] Drools Guvnor documentation issue
Hi, I downloaded standalone Guvnor: http://download.jboss.org/drools/release/5.0.1.26597.FINAL/drools-5.0-guvnor-standalone.zip and then began reading the documentation to get idea how to start with it: http://downloads.jboss.com/drools/docs/5.0.1.26597.FINAL/drools-guvnor/html_single/index.html The issue which I noticed is that the documentation says: 1.2.1. Installation Once the drools-guvnor.war has been placed in the deployment directory, and the application server started, you should navigate to * http://localhost/drools-jbrms* and check that Guvnor appears. (Obviously substitute the URL for what your application server is configured to). , whereas the guvnor application is accessible from * http://localhost/drools-guvnor.* Of course, this info can be found out from the jboss(tomcat) log, but i believe it's better to have correct link right in the docs. Regards, Alexander ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
[rules-users] Compatibility of Drools for High Traffic events
Hi, I'm planning to use drools to define rules and execute promotions for telecommunication events such as voice call, SMS, MMS, etc.. events. So we can expect very large amount of events per day. We need to define different business rules to provide promotions, bonuses to the subscribers. Some of the example promotions are listed here. 1. During the period of X-Y, every 10th MMS sender gets $ 2.00 worth of free SMS. And the winners will be notified via SMS. 2. During the period of X-Y, random 100 calls to Japan of the CHAT tariff plan get free movie tickets. And the winners will be notified via SMS. The same subscriber will not be selected as winner again and again. 3. During the period of X-Y, any subscribers have usage for voice call or SMS get bonuses as follows : $ 10 - 20 : get 20% as bonus of free SMS $ 20 - 50 : get 50% as bonus of free air time $ 50 - 70 : get 70% as bonus of free IDD I'm in the evaluation period of the Drools for the system. If anybody give recommendations or flexibilities/limitations of the drools for our application. Thanks, Thilina ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] Exposing the rule engine as a web service to be accessed by the client
My requirement is to expose drools rules as a web service ,which can be accessed by any kind of client including .net .I have built a struts based web application.When the user submits the struts client should be able to submit the data ,to the web service ,which will execute the rule engine ,and fire all rules ,and send a response back to the client.You said it correctly the drools execution server can suffice my need. My doubts are 1.Is it possible that I dont use guvnor ,and instead use just the drools expert with drl files with the execution server. 2.The data from the struts client should be converted into xml ,fact object and sent to the server to be used in the rules.Am I thinking right. A sample code showing how the client ,sends xml data to server ,and the response sent back to the client ,will be very helpful to me. Please help.I have a deadline.:-( tanzu pkpkpkpk wrote: Using the Drools execution server, the rules engine can be exposed as a web service. In http://hudson.jboss.org/hudson/job/drools/lastSuccessfulBuild/artifact/trunk/target/docs/drools-guvnor/html_single/index.html, check out section 1.4.7.2 The web service can be invoked using JSON or XML, so, it is possible to invoke it from any client. Regards, Prem On Sun, Jun 14, 2009 at 6:45 AM, tanzu tanu...@rediffmail.com wrote: Can the drools rule engine ,be exposed as a web service or do we need to write a web service and make an explicit call to rule engine ,using the working memory. Is it possible for a .net application to invoke drools rule engine. Please help as I am a newbie Thanks tanzu -- View this message in context: http://www.nabble.com/Exposing-the-rule-engine-as-a-web-service-to-be-accessed-by-the-client-tp23961020p23961020.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 ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users -- View this message in context: http://www.nabble.com/Exposing-the-rule-engine-as-a-web-service-to-be-accessed-by-the-client-tp23961020p24092604.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] Exposing the rule engine as a web service to be accessed by the client
tanzu wrote: My requirement is to expose drools rules as a web service ,which can be accessed by any kind of client including .net .I have built a struts based web application.When the user submits the struts client should be able to submit the data ,to the web service ,which will execute the rule engine ,and fire all rules ,and send a response back to the client.You said it correctly the drools execution server can suffice my need. My doubts are 1.Is it possible that I dont use guvnor ,and instead use just the drools expert with drl files with the execution server. 2.The data from the struts client should be converted into xml ,fact object and sent to the server to be used in the rules.Am I thinking right. A sample code showing how the client ,sends xml data to server ,and the response sent back to the client ,will be very helpful to me. Please help.I have a deadline.:-( If you are using Drools 5.0, we have the new Command and Pipeline api with built in XML marshalling. This was all designed to allow it to be easily hooked up to any service. This unit test shows a large set of examples of working with the XML, via the pipeline: http://fisheye.jboss.org/browse/JBossRules/trunk/drools-pipeline/drools-transformer-xstream/src/test/java/org/drools/runtime/pipeline/impl/XStreamBatchExecutionTest.java?r=HEAD Mark tanzu pkpkpkpk wrote: Using the Drools execution server, the rules engine can be exposed as a web service. In http://hudson.jboss.org/hudson/job/drools/lastSuccessfulBuild/artifact/trunk/target/docs/drools-guvnor/html_single/index.html, check out section 1.4.7.2 The web service can be invoked using JSON or XML, so, it is possible to invoke it from any client. Regards, Prem On Sun, Jun 14, 2009 at 6:45 AM, tanzu tanu...@rediffmail.com wrote: Can the drools rule engine ,be exposed as a web service or do we need to write a web service and make an explicit call to rule engine ,using the working memory. Is it possible for a .net application to invoke drools rule engine. Please help as I am a newbie Thanks tanzu -- View this message in context: http://www.nabble.com/Exposing-the-rule-engine-as-a-web-service-to-be-accessed-by-the-client-tp23961020p23961020.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 ___ 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] Traversing the Rete Network
LeftTupleSource.getSinkPropagator().getSinks() ObjectSource.getSinkPropagator().getSinks() 2009/6/18 Peter Wong peterwong1...@gmail.com Hello, I am trying to find out if and why a rule is not activated/fired when asserting a piece of data. At the moment I am using JBoss AOP to pointcut the method EntryPointNode.assertObject(), and from there I run an algorithm to walk to every node in the rete network. My question is how can I be sure that I have indeed accessed every node in the network? Thanks for your help. Regards, Peter ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users -- Edson Tirelli JBoss Drools Core Development JBoss, a division of Red Hat @ www.jboss.com ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] Compatibility of Drools for High Traffic events
I've been doing similar things in an ESME (direct SMSC connection) but without rules, as the conditions were much simpler, and just handling SMS messages themselves. I guess you'll base your decision on billing records, possibly in connection with subscriber data. Billing records might be a bit bulky; and the class(es) representing them s.b. well structured (bean style). But I have seen telecommunication provider solutions where the data (from the subscriber DB) hat to be accessed using property keys, which would not be so nice for writing rules (with any such system, probably). Also, do you need to distribute your goodies in real time (so that a caller is informed right away - marketing will love that for obvious reasons) or can you do it after time 'Y'? The former is a little more intricate, especially distributing on a fractional rate (and not by every n-th). -W On 6/18/09, Thilina Anjitha thil...@hsenidmobile.com wrote: Hi, I'm planning to use drools to define rules and execute promotions for telecommunication events such as voice call, SMS, MMS, etc.. events. So we can expect very large amount of events per day. We need to define different business rules to provide promotions, bonuses to the subscribers. Some of the example promotions are listed here. 1. During the period of X-Y, every 10th MMS sender gets $ 2.00 worth of free SMS. And the winners will be notified via SMS. 2. During the period of X-Y, random 100 calls to Japan of the CHAT tariff plan get free movie tickets. And the winners will be notified via SMS. The same subscriber will not be selected as winner again and again. 3. During the period of X-Y, any subscribers have usage for voice call or SMS get bonuses as follows : $ 10 - 20 : get 20% as bonus of free SMS $ 20 - 50 : get 50% as bonus of free air time $ 50 - 70 : get 70% as bonus of free IDD I'm in the evaluation period of the Drools for the system. If anybody give recommendations or flexibilities/limitations of the drools for our application. Thanks, Thilina ___ 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] Updating the knowledge base manually...
Hi, I'm very new to Drools and don't know if this is possible, but i'm trying to manually update the knowledge base with the following steps : 1. Retrieve a knowledge builder from KnowledgeBuilderFactory 2. Load a drl rules file into builder 3. Create a knowledge base with the knowledge packages from the builder 4. Create a session from the kbase 4. Insert objects into the working memory = Activations are created 5. Fire all rules = Rules are launched , objects are created by rules and asserted into the WM 6. Retract objects generated by rules from the WM 7. Remove knowledge packages from the kbase 8. Generate another builder, load a different drl rules file and add the knowledge pacakges to the kbase = Activations are created automatically just after adding new packages but objects are created by rules and asserted into the WM. 9. Fire all rules - Te agenda is empty , no rules are launched. Are the 8th and 9th steps the expected behaviour or i'm just doing something wrong ? The same seems to happen when Thanks in advance. Pablo. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] Updating the knowledge base manually...
First of all, your approach does not sound like a good approach. If you are removing all rules and adding new ones, why not simply create a new knowledge base? Anyway, by default, drools fires all rules right after a rulebase is updated. To disable this behavior, you need to set a knowledge base configuration. Unfortunately setting this property now requires a down cast: KnowledgeBaseConfiguration conf = ... ((RuleBaseConfiguration)conf).setRuleBaseUpdateHandler( null ); I will add an option API to allow the configuration without the cast. []s Edson 2009/6/18 Pablo Navais pnav...@gmail.com Hi, I'm very new to Drools and don't know if this is possible, but i'm trying to manually update the knowledge base with the following steps : 1. Retrieve a knowledge builder from KnowledgeBuilderFactory 2. Load a drl rules file into builder 3. Create a knowledge base with the knowledge packages from the builder 4. Create a session from the kbase 4. Insert objects into the working memory = Activations are created 5. Fire all rules = Rules are launched , objects are created by rules and asserted into the WM 6. Retract objects generated by rules from the WM 7. Remove knowledge packages from the kbase 8. Generate another builder, load a different drl rules file and add the knowledge pacakges to the kbase = Activations are created automatically just after adding new packages but objects are created by rules and asserted into the WM. 9. Fire all rules - Te agenda is empty , no rules are launched. Are the 8th and 9th steps the expected behaviour or i'm just doing something wrong ? The same seems to happen when Thanks in advance. Pablo. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users -- Edson Tirelli JBoss Drools Core Development JBoss, a division of Red Hat @ www.jboss.com ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] Compatibility of Drools for High Traffic events
Thanks for the quick response. Yes, the events will be collected from the CDR(caller details records) files. We will decode the CDR files and store in a database. So the Rule Engine should be able to process these events to identify who are the candidate winners. This winner selection criteria can be defined as a Rule. (Pls check the examples Rules specified in the mail). Rules need to fire with a scheduler basis not real time and winners will be notified at the end of the promotion period. So I would like to know the feasibility of Drools for this kind of an application. Thanks, Thilina On Thu, 2009-06-18 at 15:35 +0200, Wolfgang Laun wrote: I've been doing similar things in an ESME (direct SMSC connection) but without rules, as the conditions were much simpler, and just handling SMS messages themselves. I guess you'll base your decision on billing records, possibly in connection with subscriber data. Billing records might be a bit bulky; and the class(es) representing them s.b. well structured (bean style). But I have seen telecommunication provider solutions where the data (from the subscriber DB) hat to be accessed using property keys, which would not be so nice for writing rules (with any such system, probably). Also, do you need to distribute your goodies in real time (so that a caller is informed right away - marketing will love that for obvious reasons) or can you do it after time 'Y'? The former is a little more intricate, especially distributing on a fractional rate (and not by every n-th). -W On 6/18/09, Thilina Anjitha thil...@hsenidmobile.com wrote: Hi, I'm planning to use drools to define rules and execute promotions for telecommunication events such as voice call, SMS, MMS, etc.. events. So we can expect very large amount of events per day. We need to define different business rules to provide promotions, bonuses to the subscribers. Some of the example promotions are listed here. 1. During the period of X-Y, every 10th MMS sender gets $ 2.00 worth of free SMS. And the winners will be notified via SMS. 2. During the period of X-Y, random 100 calls to Japan of the CHAT tariff plan get free movie tickets. And the winners will be notified via SMS. The same subscriber will not be selected as winner again and again. 3. During the period of X-Y, any subscribers have usage for voice call or SMS get bonuses as follows : $ 10 - 20 : get 20% as bonus of free SMS $ 20 - 50 : get 50% as bonus of free air time $ 50 - 70 : get 70% as bonus of free IDD I'm in the evaluation period of the Drools for the system. If anybody give recommendations or flexibilities/limitations of the drools for our application. Thanks, Thilina ___ 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] functions .drl file
Is it possible to create a .drl file of nothing but functions then import those into another .drl file to make it easy to maintain one file of API style functions and then beable to call them from any additional .drl files? Thanks, Chris ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
[rules-users] OSGI, classloading, and imports in KnowledgeBuilder
So I'm playing with Drools in Equinox OSGi, and so far it's behaving quite nicely - one bit of weirdness though. What I'm trying to do: I have a bundle with a 'flow manager' that listens for instances of WorkItemHandler in the service broker (well, really my own subinterface that has a getName method). It also listens for new bundles with a META-INF/drools directory with *.rf files in them, and parses the .rf files it finds there. The Flow Manager is itself published as an OSGI Service with a 'perform' method. It encapsulates all of its Drools calls within the perform method though - they aren't exposed to clients. My test involves a simple start-work item-end workflow. I pass in an instance of a class Tablex that can be saved to hibernate. I also pass in a String that has the table name, and an empty List to get the results. My .rf file tries to import Tablex. It declares the three values I mention above, and maps them to the work item in the work item definition. p imports import name=my.pkg.Tablex / /imports ... variable name=my.pkg.newrecord type name=org.drools.process.core.datatype.impl.type.ObjectDataType className=my.pkg.Tablex/ /variable ... workItem id=2 name=DBWorkItem x=165 y=374 width=80 height=40 work name=DBWorkItem /work mapping type=in from=my.pkg.tablename to=my.pkg.tablename / mapping type=in from=my.pkg.newrecord to=my.pkg.newrecord/ mapping type=in from=my.pkg.outlist to=my.pkg.outlist/ /workItem /p In my manifest for my .rf file and for the flow manager (where the parsing occurs) I Import-Package Tablex's package. When my flow manager tries parsing the rule, it gives an error saying the the import failed. BUT, everything still works, and my WorkItemHandler works correctly (the WorkItemHandler imports Tablex itself, since it needs to manipulate it). If I declare my Tablex variable as a java.util.Object in the ruleflow then I don't get the error and things also still work. If I declare my Tablex as Tablex in the rule flow AND import it in the class that does the parsing (it's already 'OSGI' imported to the parsing bundle, but now I'm doing a plain old Java import on it) then everything works fine with no error message. Kind of a hybrid question but I figured I'd start with the Drools folks. Any ideas would be appreciated. Thanks, Mike -- View this message in context: http://www.nabble.com/OSGI%2C-classloading%2C-and-imports-in-KnowledgeBuilder-tp24099671p24099671.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] OSGI, classloading, and imports in KnowledgeBuilder
Update: The plot thickens. Sometimes when I'm importing my domain class in the rulesflow, it works, and sometimes it does not. This seems to be tied to the class loader that happens to be in the current thread context. Sometimes it is org.eclipse.core.runtime.internal.adaptor.ContextFinder and sometimes it is another type. I don't know what class the 'other type' is because it overrides Object's toString()and I was just doing getClassLoader().toString(). I've changed it to getClassLoader().getClass().getName() so I can see what the real object is if it happens again msully wrote: So I'm playing with Drools in Equinox OSGi, and so far it's behaving quite nicely - one bit of weirdness though. What I'm trying to do: I have a bundle with a 'flow manager' that listens for instances of WorkItemHandler in the service broker (well, really my own subinterface that has a getName method). It also listens for new bundles with a META-INF/drools directory with *.rf files in them, and parses the .rf files it finds there. The Flow Manager is itself published as an OSGI Service with a 'perform' method. It encapsulates all of its Drools calls within the perform method though - they aren't exposed to clients. My test involves a simple start-work item-end workflow. I pass in an instance of a class Tablex that can be saved to hibernate. I also pass in a String that has the table name, and an empty List to get the results. My .rf file tries to import Tablex. It declares the three values I mention above, and maps them to the work item in the work item definition. p imports import name=my.pkg.Tablex / /imports ... variable name=my.pkg.newrecord type name=org.drools.process.core.datatype.impl.type.ObjectDataType className=my.pkg.Tablex/ /variable ... workItem id=2 name=DBWorkItem x=165 y=374 width=80 height=40 work name=DBWorkItem /work mapping type=in from=my.pkg.tablename to=my.pkg.tablename / mapping type=in from=my.pkg.newrecord to=my.pkg.newrecord/ mapping type=in from=my.pkg.outlist to=my.pkg.outlist/ /workItem /p In my manifest for my .rf file and for the flow manager (where the parsing occurs) I Import-Package Tablex's package. When my flow manager tries parsing the rule, it gives an error saying the the import failed. BUT, everything still works, and my WorkItemHandler works correctly (the WorkItemHandler imports Tablex itself, since it needs to manipulate it). If I declare my Tablex variable as a java.util.Object in the ruleflow then I don't get the error and things also still work. If I declare my Tablex as Tablex in the rule flow AND import it in the class that does the parsing (it's already 'OSGI' imported to the parsing bundle, but now I'm doing a plain old Java import on it) then everything works fine with no error message. Kind of a hybrid question but I figured I'd start with the Drools folks. Any ideas would be appreciated. Thanks, Mike -- View this message in context: http://www.nabble.com/OSGI%2C-classloading%2C-and-imports-in-KnowledgeBuilder-tp24099671p24099685.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] functions
Chris,
If you are creating a function library, why don't you create it as static
methods in a java class? easier to develop, to unit test and you can use
import function in the DRL to import all of them.
[]s
Edson
2009/6/18 Chris Richmond crichm...@referentia.com
Ok…I am trying to build a function library in my .drl file and I added
this one test function
function String outputString(String sData){
return sData;
}
And no matter where I place this in my .drl file, I get an exception one
way or the other with compiling when I try instaniate and fire my rules.
The .drl file works exactly as expected if I remove this function
declaration, and when I **do** try to add it, I do not actually call it
anywhere…but get those errors.
So my question is, where exactly do I need to place function declarations..
Thanks,
Chris
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RE: [rules-users] functions
Edson,
Thanks.and I am considering that option as well.but the nice thing about the
functions in the drl file is the system remains much more fluid..in other
words, if I can focus on doing what I want to do all within the DRL file, it
proves the flexibility of the system more to me than having to have
developer recompile the application itself with new classes. Does that make
sense? Also, I would just like to know that I can actually make functions
work for future reference.
Thanks,
Chris
_
From: rules-users-boun...@lists.jboss.org
[mailto:rules-users-boun...@lists.jboss.org] On Behalf Of Edson Tirelli
Sent: Thursday, June 18, 2009 1:15 PM
To: Rules Users List
Subject: Re: [rules-users] functions
Chris,
If you are creating a function library, why don't you create it as static
methods in a java class? easier to develop, to unit test and you can use
import function in the DRL to import all of them.
[]s
Edson
2009/6/18 Chris Richmond crichm...@referentia.com
Ok.I am trying to build a function library in my .drl file and I added this
one test function
function String outputString(String sData){
return sData;
}
And no matter where I place this in my .drl file, I get an exception one way
or the other with compiling when I try instaniate and fire my rules. The
.drl file works exactly as expected if I remove this function declaration,
and when I *do* try to add it, I do not actually call it anywhere.but get
those errors.
So my question is, where exactly do I need to place function declarations..
Thanks,
Chris
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JBoss Drools Core Development
JBoss, a division of Red Hat @ www.jboss.com
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Re: [rules-users] functions
That's a great idea Edson. I just found Mark's posting on this from 2006:
http://markmail.org/message/pbs73eainajilmjm
Very helpful.
best wishes,
Andrew
2009/6/18 Chris Richmond crichm...@referentia.com
Edson,
Thanks…and I am considering that option as well…but the nice thing about
the functions in the drl file is the system remains much more fluid..in
other words, if I can focus on doing what I want to do all within the DRL
file, it proves the flexibility of the system more to me than having to
have developer recompile the application itself with new classes. Does
that make sense? Also, I would just like to know that I can actually make
functions work for future reference.
Thanks,
Chris
--
*From:* rules-users-boun...@lists.jboss.org [mailto:
rules-users-boun...@lists.jboss.org] *On Behalf Of *Edson Tirelli
*Sent:* Thursday, June 18, 2009 1:15 PM
*To:* Rules Users List
*Subject:* Re: [rules-users] functions
Chris,
If you are creating a function library, why don't you create it as
static methods in a java class? easier to develop, to unit test and you can
use import function in the DRL to import all of them.
[]s
Edson
2009/6/18 Chris Richmond crichm...@referentia.com
Ok…I am trying to build a function library in my .drl file and I added this
one test function
function String outputString(String sData){
return sData;
}
And no matter where I place this in my .drl file, I get an exception one
way or the other with compiling when I try instaniate and fire my rules.
The .drl file works exactly as expected if I remove this function
declaration, and when I **do** try to add it, I do not actually call it
anywhere…but get those errors.
So my question is, where exactly do I need to place function declarations..
Thanks,
Chris
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JBoss Drools Core Development
JBoss, a division of Red Hat @ www.jboss.com
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Re: [rules-users] functions
Chris,
I understand. Although functions in DRL files where conceived to be very
simple things to reside with the rules. So, although you can have a DRL file
with all your functions and, as long as this file is the first you load into
your knowledge builder, use the functions on other files, we did not
implement any king of specific multifile import... meaning that the eclipse
plugin, for instance, will raise errors when accessing functions from one
file into another... but your application will run fine...
Regarding recompiling the application, I think you just said that meaning
recompiling the java file with the functions right? since the java file can
be anywhere, including your domain model jar or even in a jar by himself...
in any case, be it a function or a java static method, it is code and you
will need a developer to do it, right?
[]s
Edson
2009/6/18 Chris Richmond crichm...@referentia.com
Edson,
Thanks…and I am considering that option as well…but the nice thing about
the functions in the drl file is the system remains much more fluid..in
other words, if I can focus on doing what I want to do all within the DRL
file, it proves the flexibility of the system more to me than having to
have developer recompile the application itself with new classes. Does
that make sense? Also, I would just like to know that I can actually make
functions work for future reference.
Thanks,
Chris
--
*From:* rules-users-boun...@lists.jboss.org [mailto:
rules-users-boun...@lists.jboss.org] *On Behalf Of *Edson Tirelli
*Sent:* Thursday, June 18, 2009 1:15 PM
*To:* Rules Users List
*Subject:* Re: [rules-users] functions
Chris,
If you are creating a function library, why don't you create it as
static methods in a java class? easier to develop, to unit test and you can
use import function in the DRL to import all of them.
[]s
Edson
2009/6/18 Chris Richmond crichm...@referentia.com
Ok…I am trying to build a function library in my .drl file and I added this
one test function
function String outputString(String sData){
return sData;
}
And no matter where I place this in my .drl file, I get an exception one
way or the other with compiling when I try instaniate and fire my rules.
The .drl file works exactly as expected if I remove this function
declaration, and when I **do** try to add it, I do not actually call it
anywhere…but get those errors.
So my question is, where exactly do I need to place function declarations..
Thanks,
Chris
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Edson Tirelli
JBoss Drools Core Development
JBoss, a division of Red Hat @ www.jboss.com
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Edson Tirelli
JBoss Drools Core Development
JBoss, a division of Red Hat @ www.jboss.com
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Re: [rules-users] functions
The only requirement in this case is that when you create the
KnowledgeBuilder and starting adding the resources to it (DRL, flows, dsls,
etc), a given resource can only reference an asset that was previously
loaded. So, you must make sure the DRL with your functions is the first
resource to be added. Other than this, everything else should work just
fine.
[]s
Edson
2009/6/18 Chris Richmond crichm...@referentia.com
Yes….for the most part, a non developer wouln’t be able to write the
rules anyway….you need someone with domain knowledge of the objects being
injected, so I don’t see a non developer writing rules.I was trying to
take the approach that if, from the application code perspective, I only
worrry about injecting objects I wish to reason on, and not try to think of
new functions, new stats/bookkeeping classe I might need..if I can
demonstrate doing that all within the rule, it seems to show it’s
flexibility more than having to modify your codebase(beyond simple
session/api calls) to analyze those objects you are injecting.
One think to keep in mind is that I am utilizing mainly Fusion…since I am
dealing with sensor type data simply being fed into the system
contintuously, so It’s very fluid as to the types of calculations/rules I
might have to implement compared perhaps with a standard business object
type of data. I want to become a guru and munging, creating, and using all
sorts of constructs within Fusion for being able to accomplish almost any
rule withought having to do anything besides simply injecting my sensor data
ojbects into the memory stream…in my mind, that will lead me to the greatest
flexibility and demostration of the power of being able to add the rules
engine onto an already fully functioning and robust application that was
written without planning for rules automation.
I should mention I do not use the eclipse plugin or eclipse at all for my
rules testing/development, so I don’t have any issues with eclipse plugin
not breaking.
So….assuming I **did** want to put a simple function in my .drl
file….*where* do I have to put it? My oringal question about how to make a
simple function declaration is still a mystery to me.
Thanks
Chris
--
*From:* rules-users-boun...@lists.jboss.org [mailto:
rules-users-boun...@lists.jboss.org] *On Behalf Of *Edson Tirelli
*Sent:* Thursday, June 18, 2009 2:25 PM
*To:* Rules Users List
*Subject:* Re: [rules-users] functions
Chris,
I understand. Although functions in DRL files where conceived to be very
simple things to reside with the rules. So, although you can have a DRL file
with all your functions and, as long as this file is the first you load into
your knowledge builder, use the functions on other files, we did not
implement any king of specific multifile import... meaning that the eclipse
plugin, for instance, will raise errors when accessing functions from one
file into another... but your application will run fine...
Regarding recompiling the application, I think you just said that
meaning recompiling the java file with the functions right? since the java
file can be anywhere, including your domain model jar or even in a jar by
himself... in any case, be it a function or a java static method, it is code
and you will need a developer to do it, right?
[]s
Edson
2009/6/18 Chris Richmond crichm...@referentia.com
Edson,
Thanks…and I am considering that option as well…but the nice thing about
the functions in the drl file is the system remains much more fluid..in
other words, if I can focus on doing what I want to do all within the DRL
file, it proves the flexibility of the system more to me than having to
have developer recompile the application itself with new classes. Does
that make sense? Also, I would just like to know that I can actually make
functions work for future reference.
Thanks,
Chris
--
*From:* rules-users-boun...@lists.jboss.org [mailto:
rules-users-boun...@lists.jboss.org] *On Behalf Of *Edson Tirelli
*Sent:* Thursday, June 18, 2009 1:15 PM
*To:* Rules Users List
*Subject:* Re: [rules-users] functions
Chris,
If you are creating a function library, why don't you create it as
static methods in a java class? easier to develop, to unit test and you can
use import function in the DRL to import all of them.
[]s
Edson
2009/6/18 Chris Richmond crichm...@referentia.com
Ok…I am trying to build a function library in my .drl file and I added this
one test function
function String outputString(String sData){
return sData;
}
And no matter where I place this in my .drl file, I get an exception one
way or the other with compiling when I try instaniate and fire my rules.
The .drl file works exactly as expected if I remove this function
declaration, and when I **do** try to add it, I do not actually
