Exception handling policy
by Gerret Hansper
Hello,
I have got a question about Exception handling policy in Drools 5.0.
My issue is a case where a client application triggered rule execution on the
server, which was throwing a ConsequenceException.
The client, not having drools libs in its classpath, then had a
ClassNotFoundException.
I would therefore want to catch the ConsequenceException on the server and throw
an Exception with its cause.
I am not sure however if ConsequenceException.getCause() would always yield a
non-drools Exception or if that might be another drools type.
Also, is it always a ConsequenceException that gets thrown from a session or can
there be other Exception types?
Thanks,
Gerret
16 years, 1 month
-Uploading modified output file
by Fnu Mahalakshmi
Hi,
I have data from a text file (consists of 2 columns : A and B with data respectively)which is read and stored into a Vector <Objects>.
I have multiple input files with 2 columns of data so used Vector<Objects>.
This collection of data is loaded to my rule runner which loads data in the rulebase and fires rules on that data.
1. how do I upload the modified data output into another text file? Should I reload it in a vector?
But whenever rule is fired and data is modified how can I store the modified data in another file? Because my input and output has different columns.
1. is using a vector a bad way?? Could I do it in any other better way?
2. how can I identify what my A and B columns are- to load the specific rule only?? As of now I am just reading its name and storing it.
Could I do it in a better way???
Please help!!
Thankyou.
M
</pre>
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16 years, 1 month
Re: [rules-users] Object referencing error
by Fnu Mahalakshmi
Thank you guys so much for all the help!!! I am trying out what you suggested. :)
-----Original Message-----
From: rules-users-bounces(a)lists.jboss.org [mailto:rules-users-bounces@lists.jboss.org] On Behalf Of rules-users-request(a)lists.jboss.org
Sent: Friday, June 04, 2010 7:48 AM
To: rules-users(a)lists.jboss.org
Subject: rules-users Digest, Vol 43, Issue 18
Send rules-users mailing list submissions to
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When replying, please edit your Subject line so it is more specific
than "Re: Contents of rules-users digest..."
Today's Topics:
1. Using the ForEach component in RuleFlow (Darshan)
2. Re: forEach node Clarification (Darshan)
3. Re: Object Referencing Error (Esteban Aliverti)
----------------------------------------------------------------------
Message: 1
Date: Fri, 4 Jun 2010 03:30:46 -0700 (PDT)
From: Darshan <darshan.vartak(a)polaris.co.in>
Subject: [rules-users] Using the ForEach component in RuleFlow
To: rules-users(a)lists.jboss.org
Message-ID: <1275647446097-870012.post(a)n3.nabble.com>
Content-Type: text/plain; charset=us-ascii
I am trying to use ForEach component in the process flow. I need to call a
set of rules in loop. I have this subFlow created inside ForEach component.
The collection set in the working memory becomes available to the ForEach
component and infact even in subFlow the OnEntryAction and OnExitAction can
access the integerObject from the collection. But when it comes to executing
the rules, looks like the integerObject is not available to the rule and
none of the rules are executed. If I add a dummy rule without any condition
it does get executed but only once. Have anybody tried similar kind of
scenario. If yes please send me some example, as I am really stuch out here
trying to call rules in a loop.
I am attaching the souce code along with this post. Please have a look.
Here is how the ForEach flow looks like
http://drools-java-rules-engine.46999.n3.nabble.com/file/n870012/ForEachF...
Here is my SubFlow layout
http://drools-java-rules-engine.46999.n3.nabble.com/file/n870012/subProce...
Here is the output of Java Program
Setting numberList
Entry 1
Entry 2
Exit 1
Entry 3
Exit 2
Entry 4
Exit 3
Entry 5
Exit 4
Entry 6
Exit 5
Entry 7
Exit 6
Entry 8
Exit 7
Entry 9
Exit 8
Entry 10
Exit 9
Entry 11
Exit 10
Entry 12
Exit 11
Entry 13
Exit 12
Entry 14
Exit 13
Entry 15
Exit 14
Entry 16
Exit 15
Entry 17
Exit 16
Entry 18
Exit 17
Entry 19
Exit 18
Exit 19
Rules executed
testSubFlowForEach.rf looks like this
<?xml version="1.0" encoding="UTF-8"?>
<process xmlns="http://drools.org/drools-5.0/process"
xmlns:xs="http://www.w3.org/2001/XMLSchema-instance"
xs:schemaLocation="http://drools.org/drools-5.0/process
drools-processes-5.0.xsd"
type="RuleFlow" name="testForEach" id="processForEach"
package-name="com.sample" >
<header>
<imports>
<import name="java.util.ArrayList" />
<import name="com.sample.IntegerObject" />
</imports>
<variables>
<variable name="numberList" >
<type
name="org.drools.process.core.datatype.impl.type.ObjectDataType"
className="java.util.ArrayList" />
</variable>
<variable name="integerObject" >
<type
name="org.drools.process.core.datatype.impl.type.ObjectDataType"
className="com.sample.IntegerObject" />
</variable>
</variables>
</header>
<nodes>
<start id="1" name="Start" x="224" y="15" width="80" height="40" />
<forEach id="2" name="processForEach" x="163" y="111" width="203"
height="268" variableName="integerObject" collectionExpression="numberList"
>
<nodes>
<subProcess id="13" name="SubProcess" x="55" y="110" width="80"
height="40" processId="testSubFlow" independent="false" >
<mapping type="in" from="integerObject" to="integerObject" />
<onEntry>
<action type="expression" dialect="java" >System.out.println("Entry
" + ((IntegerObject) integerObject).getIntVal());</action>
</onEntry>
<onExit>
<action type="expression" dialect="java" >System.out.println("Exit "
+ ((IntegerObject) integerObject).getIntVal());</action>
</onExit>
</subProcess>
</nodes>
<connections>
</connections>
<in-ports>
<in-port type="DROOLS_DEFAULT" nodeId="13"
nodeInType="DROOLS_DEFAULT" />
</in-ports>
<out-ports>
<out-port type="DROOLS_DEFAULT" nodeId="13"
nodeOutType="DROOLS_DEFAULT" />
</out-ports>
</forEach>
<end id="5" name="End" x="230" y="456" width="80" height="40" />
</nodes>
<connections>
<connection from="1" to="2" />
<connection from="2" to="5" />
</connections>
</process>
http://drools-java-rules-engine.46999.n3.nabble.com/file/n870012/testForE...
testForEach.zip
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------------------------------
Message: 2
Date: Fri, 4 Jun 2010 04:21:50 -0700 (PDT)
From: Darshan <darshan.vartak(a)polaris.co.in>
Subject: Re: [rules-users] forEach node Clarification
To: rules-users(a)lists.jboss.org
Message-ID: <1275650510581-870109.post(a)n3.nabble.com>
Content-Type: text/plain; charset=us-ascii
Hi Rajakanthan,
I am trying similar kind of thing and need help. I need to call a set of
rules in loop by passing a object fro0 a collection to the rules. Here are
more details about What I am trying to do. Please help.
http://drools-java-rules-engine.46999.n3.nabble.com/Using-the-ForEach-com...
Here is the code
http://drools-java-rules-engine.46999.n3.nabble.com/file/n870109/testForE...
testForEach.zip
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------------------------------
Message: 3
Date: Fri, 4 Jun 2010 08:47:29 -0300
From: Esteban Aliverti <esteban.aliverti(a)gmail.com>
Subject: Re: [rules-users] Object Referencing Error
To: Rules Users List <rules-users(a)lists.jboss.org>
Message-ID:
<AANLkTimIW7JDDsJauQJk6KraHSUKsiAbhfjrlq0zyUZu(a)mail.gmail.com>
Content-Type: text/plain; charset="windows-1252"
True, I forgot about the objectB field restriction.
2010/6/4 Swindells, Thomas <TSwindells(a)nds.com>
> In fact in your case you when condition doesn?t make any sense ? B will
> never equal the empty string as B isn?t a string.
>
> You probable want the following:
>
> rule ?foo?
>
> when
> $a :A(Type == "Prod" , objectB == null)
>
> then
> B bobject = new B();
>
> bobject.setType(?Prod?);
>
> bobject.setId($a.getNumber().getId());
>
> modify($a) {
>
> setObjectB(bobject);
>
> };
>
> end
>
>
>
> This rule only executes when objectB is null, this means you won?t get
> into the loop as once you have created objectB the rule won?t evaluate to
> true again.
>
>
>
> Thomas
>
>
>
> *From:* rules-users-bounces(a)lists.jboss.org [mailto:
> rules-users-bounces(a)lists.jboss.org] *On Behalf Of *Esteban Aliverti
> *Sent:* 03 June 2010 23:43
> *To:* Rules Users List
> *Subject:* Re: [rules-users] Object Referencing Error
>
>
>
> Yes, your rule entered in an infinite loop because when every time you
> insert/modify/retract a Fact, rules are reevaluated to check if the
> insertion/modification/retraction generates activations or not. In your
> case, your rule is being reevaluated every time you update your $a object,
> the evaluation ends firing the rule, and this starts an endless loop.
>
> If you only have this behavior with this rule, you can consider using the
> "no-loop" attribute. If your problem is multiple rules being re executed
> (and you don't wont that) you can use "lock-on-active" attribute. Try to
> read the documentation about these attributes for further information.
>
> It is very important for the people new in drools to understand the life
> cycle of a rule.
>
>
>
> Best,
>
> On Thu, Jun 3, 2010 at 7:33 PM, Fnu Mahalakshmi <FMahalakshmi(a)nyx.com>
> wrote:
>
> Hi,
>
> I tried what you said but program goes into an infinite loop.
> It does not break out of the when loop only.
> I did exactly as you mentioned.
> In the test information I put in a.type = "Prod"
> And a.bObject(new B());
> Any idea whats wrong??
>
> Thanks,
> M
>
> -----Original Message-----
> From: rules-users-bounces(a)lists.jboss.org [mailto:
> rules-users-bounces(a)lists.jboss.org] On Behalf Of
> rules-users-request(a)lists.jboss.org
> Sent: Thursday, June 03, 2010 4:52 PM
> To: rules-users(a)lists.jboss.org
> Subject: rules-users Digest, Vol 43, Issue 15
>
> Send rules-users mailing list submissions to
> rules-users(a)lists.jboss.org
>
> To subscribe or unsubscribe via the World Wide Web, visit
> https://lists.jboss.org/mailman/listinfo/rules-users
> or, via email, send a message with subject or body 'help' to
> rules-users-request(a)lists.jboss.org
>
> You can reach the person managing the list at
> rules-users-owner(a)lists.jboss.org
>
> When replying, please edit your Subject line so it is more specific
> than "Re: Contents of rules-users digest..."
>
>
> Today's Topics:
>
> 1. Re: Object Referencing error: (Esteban Aliverti)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Thu, 3 Jun 2010 17:51:10 -0300
> From: Esteban Aliverti <esteban.aliverti(a)gmail.com>
> Subject: Re: [rules-users] Object Referencing error:
> To: Rules Users List <rules-users(a)lists.jboss.org>
> Message-ID:
> <AANLkTimeZIJ5VfMTBESLFJIWoc_4MEZSXbKMIXAvJRiC(a)mail.gmail.com>
> Content-Type: text/plain; charset="iso-8859-1"
>
> You can't modify bobject, becuase it doesn't exist inside the session. You
> just created it a few lines above. Maybe you need an insert() or maybe you
> need the bobject reference from the LHS. Something like this:
>
> *rule* "prod"
>
>
>
> *when*
>
> $a :A(Type == "Prod" , objectB != "")
>
> *then*
>
> B bobject = *new* B();
>
> $a.getObjectB().setType( "Prod" );
>
> $a.getObjectB().setId($a.getNumber().getId());
>
> *update*($a);
>
> * end*
>
> Note that you need to update $a and not B, because A is the inserted Fact
> in
> your session.
>
> Best,
>
>
> 2010/6/3 Fnu Mahalakshmi <FMahalakshmi(a)nyx.com>
>
> > Hi,
> >
> >
> >
> > I am getting the following error when I try to do complex object
> > referencing in drools:
> >
> > My class:
> >
> > A{
> >
> > String Type;
> >
> > B objectb;
> >
> > //getters and setters for above
> >
> > }
> >
> >
> >
> > My rules:
> >
> >
> >
> > *rule* "prod"
> >
> >
> >
> > *when*
> >
> > $a :A(Type == "Prod" , objectB != "")
> >
> > *then*
> >
> > B bobject = *new* B();
> >
> > bobject.setType( "Prod" );
> >
> > bobject.setId($a.getNumber().getId());
> >
> > *update*(bobject);
> >
> >
> >
> > *end*
> >
> > * *
> >
> > *I want to basically output a file which has updated values of B (type,
> > Id)
> >
> > *
> >
> > * *
> >
> > *Error:*
> >
> > *org.drools.spi.ConsequenceException*: *org.drools.FactException*: Update
> > error: handle not found for object: com.org.Ip@f42ad0. Is it in the
> > working memory?
> >
> > at
> > org.drools.base.DefaultConsequenceExceptionHandler.handleException(*
> > DefaultConsequenceExceptionHandler.java:13*)
> >
> > at org.drools.common.DefaultAgenda.fireActivation(*
> > DefaultAgenda.java:558*)
> >
> > at org.drools.common.DefaultAgenda.fireNextItem(*
> > DefaultAgenda.java:518*)
> >
> > at org.drools.common.AbstractWorkingMemory.fireAllRules(*
> > AbstractWorkingMemory.java:475*)
> >
> > at org.drools.common.AbstractWorkingMemory.fireAllRules(*
> > AbstractWorkingMemory.java:439*)
> >
> > at com.org.DroolsTest.main(*DroolsTest.java:30*)
> >
> > Caused by: *org.drools.FactException*: Update error: handle not found for
> > object: com.org.Ip@f42ad0. Is it in the working memory?
> >
> > at org.drools.base.DefaultKnowledgeHelper.update(*
> > DefaultKnowledgeHelper.java:100*)
> >
> > at com.org.Rule_Prod_Ip_0.consequence(*Rule_Prod_Ip_0.java:10*)
> >
> > at com.org.Rule_Prod_Ip_0ConsequenceInvoker.evaluate(*
> > Rule_Prod_Ip_0ConsequenceInvoker.java:22*)
> >
> > at org.drools.common.DefaultAgenda.fireActivation(*
> > DefaultAgenda.java:554*)
> >
> > ... 4 more
> >
> >
> >
> > Please help! I am very new to drools! Not able to figure out why this
> > error:
> >
> >
> >
> > I am using eclipse and working on Windows machine. Error above was
> > generated on eclipse console.
> >
> >
> >
> > Thank you.
> >
> >
> >
> > M
> >
> > ------------------------------
> >
> > *Please consider the environment before printing this email.*
> >
> > *Visit our website at http://www.nyse.com
> >
> *****************************************************************************
> >
> > Note: The information contained in this message and any attachment to it
> is
> > privileged, confidential and protected from disclosure. If the reader of
> > this message is not the intended recipient, or an employee or agent
> > responsible for delivering this message to the intended recipient, you
> are
> > hereby notified that any dissemination, distribution or copying of this
> > communication is strictly prohibited. If you have received this
> > communication in error, please notify the sender immediately by replying
> to
> > the message, and please delete it from your system. Thank you. NYSE
> > Euronext. *
> >
> >
> > _______________________________________________
> > rules-users mailing list
> > rules-users(a)lists.jboss.org
> > https://lists.jboss.org/mailman/listinfo/rules-users
> >
> >
>
>
> --
> XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
>
> Esteban Aliverti
>
16 years, 1 month
-Doubt using HSSFWorkbook and multiple inputs
by Fnu Mahalakshmi
Hi,
I have a real basic question about the working of drools.
I figured it to be this way:
We load our input data (our facts) - fire the rules on this data - get the modified out put in our output file.
Doubt:
I am reading all my input data from a text file.
1. How can I load all the data contained in my text file into the memory at the same time? Like we used HSSF workbook concept for the excel file?
And fire all the rules at the data at once.?
2. Again When I have multiple input files, Shouldn't I be loading all the input files in the memory and firing rules on them? How can I do that? I should have different test files for different input datasets?? (for example like the ExcelDataRulesTest.java file in the example)
I am still stuck with the procedural way of thinking- read lines and run rules and generate output.
Please help!!! I am really new to this and going round and round.
Thank you.
M
</pre>
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16 years, 1 month
Re: [rules-users] Object Referencing Error
by Fnu Mahalakshmi
Hi,
I tried what you said but program goes into an infinite loop.
It does not break out of the when loop only.
I did exactly as you mentioned.
In the test information I put in a.type = "Prod"
And a.bObject(new B());
Any idea whats wrong??
Thanks,
M
-----Original Message-----
From: rules-users-bounces(a)lists.jboss.org [mailto:rules-users-bounces@lists.jboss.org] On Behalf Of rules-users-request(a)lists.jboss.org
Sent: Thursday, June 03, 2010 4:52 PM
To: rules-users(a)lists.jboss.org
Subject: rules-users Digest, Vol 43, Issue 15
Send rules-users mailing list submissions to
rules-users(a)lists.jboss.org
To subscribe or unsubscribe via the World Wide Web, visit
https://lists.jboss.org/mailman/listinfo/rules-users
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When replying, please edit your Subject line so it is more specific
than "Re: Contents of rules-users digest..."
Today's Topics:
1. Re: Object Referencing error: (Esteban Aliverti)
----------------------------------------------------------------------
Message: 1
Date: Thu, 3 Jun 2010 17:51:10 -0300
From: Esteban Aliverti <esteban.aliverti(a)gmail.com>
Subject: Re: [rules-users] Object Referencing error:
To: Rules Users List <rules-users(a)lists.jboss.org>
Message-ID:
<AANLkTimeZIJ5VfMTBESLFJIWoc_4MEZSXbKMIXAvJRiC(a)mail.gmail.com>
Content-Type: text/plain; charset="iso-8859-1"
You can't modify bobject, becuase it doesn't exist inside the session. You
just created it a few lines above. Maybe you need an insert() or maybe you
need the bobject reference from the LHS. Something like this:
*rule* "prod"
*when*
$a :A(Type == "Prod" , objectB != "")
*then*
B bobject = *new* B();
$a.getObjectB().setType( "Prod" );
$a.getObjectB().setId($a.getNumber().getId());
*update*($a);
* end*
Note that you need to update $a and not B, because A is the inserted Fact in
your session.
Best,
2010/6/3 Fnu Mahalakshmi <FMahalakshmi(a)nyx.com>
> Hi,
>
>
>
> I am getting the following error when I try to do complex object
> referencing in drools:
>
> My class:
>
> A{
>
> String Type;
>
> B objectb;
>
> //getters and setters for above
>
> }
>
>
>
> My rules:
>
>
>
> *rule* "prod"
>
>
>
> *when*
>
> $a :A(Type == "Prod" , objectB != "")
>
> *then*
>
> B bobject = *new* B();
>
> bobject.setType( "Prod" );
>
> bobject.setId($a.getNumber().getId());
>
> *update*(bobject);
>
>
>
> *end*
>
> * *
>
> *I want to basically output a file which has updated values of B (type,
> Id)
>
> *
>
> * *
>
> *Error:*
>
> *org.drools.spi.ConsequenceException*: *org.drools.FactException*: Update
> error: handle not found for object: com.org.Ip@f42ad0. Is it in the
> working memory?
>
> at
> org.drools.base.DefaultConsequenceExceptionHandler.handleException(*
> DefaultConsequenceExceptionHandler.java:13*)
>
> at org.drools.common.DefaultAgenda.fireActivation(*
> DefaultAgenda.java:558*)
>
> at org.drools.common.DefaultAgenda.fireNextItem(*
> DefaultAgenda.java:518*)
>
> at org.drools.common.AbstractWorkingMemory.fireAllRules(*
> AbstractWorkingMemory.java:475*)
>
> at org.drools.common.AbstractWorkingMemory.fireAllRules(*
> AbstractWorkingMemory.java:439*)
>
> at com.org.DroolsTest.main(*DroolsTest.java:30*)
>
> Caused by: *org.drools.FactException*: Update error: handle not found for
> object: com.org.Ip@f42ad0. Is it in the working memory?
>
> at org.drools.base.DefaultKnowledgeHelper.update(*
> DefaultKnowledgeHelper.java:100*)
>
> at com.org.Rule_Prod_Ip_0.consequence(*Rule_Prod_Ip_0.java:10*)
>
> at com.org.Rule_Prod_Ip_0ConsequenceInvoker.evaluate(*
> Rule_Prod_Ip_0ConsequenceInvoker.java:22*)
>
> at org.drools.common.DefaultAgenda.fireActivation(*
> DefaultAgenda.java:554*)
>
> ... 4 more
>
>
>
> Please help! I am very new to drools! Not able to figure out why this
> error:
>
>
>
> I am using eclipse and working on Windows machine. Error above was
> generated on eclipse console.
>
>
>
> Thank you.
>
>
>
> M
>
> ------------------------------
>
> *Please consider the environment before printing this email.*
>
> *Visit our website at http://www.nyse.com
> *****************************************************************************
>
> Note: The information contained in this message and any attachment to it is
> privileged, confidential and protected from disclosure. If the reader of
> this message is not the intended recipient, or an employee or agent
> responsible for delivering this message to the intended recipient, you are
> hereby notified that any dissemination, distribution or copying of this
> communication is strictly prohibited. If you have received this
> communication in error, please notify the sender immediately by replying to
> the message, and please delete it from your system. Thank you. NYSE
> Euronext. *
>
>
> _______________________________________________
> rules-users mailing list
> rules-users(a)lists.jboss.org
> https://lists.jboss.org/mailman/listinfo/rules-users
>
>
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XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
Esteban Aliverti
16 years, 1 month
Using the ForEach component in RuleFlow
by Darshan
I am trying to use ForEach component in the process flow. I need to call a
set of rules in loop. I have this subFlow created inside ForEach component.
The collection set in the working memory becomes available to the ForEach
component and infact even in subFlow the OnEntryAction and OnExitAction can
access the integerObject from the collection. But when it comes to executing
the rules, looks like the integerObject is not available to the rule and
none of the rules are executed. If I add a dummy rule without any condition
it does get executed but only once. Have anybody tried similar kind of
scenario. If yes please send me some example, as I am really stuch out here
trying to call rules in a loop.
I am attaching the souce code along with this post. Please have a look.
Here is how the ForEach flow looks like
http://drools-java-rules-engine.46999.n3.nabble.com/file/n870012/ForEachF...
Here is my SubFlow layout
http://drools-java-rules-engine.46999.n3.nabble.com/file/n870012/subProce...
Here is the output of Java Program
Setting numberList
Entry 1
Entry 2
Exit 1
Entry 3
Exit 2
Entry 4
Exit 3
Entry 5
Exit 4
Entry 6
Exit 5
Entry 7
Exit 6
Entry 8
Exit 7
Entry 9
Exit 8
Entry 10
Exit 9
Entry 11
Exit 10
Entry 12
Exit 11
Entry 13
Exit 12
Entry 14
Exit 13
Entry 15
Exit 14
Entry 16
Exit 15
Entry 17
Exit 16
Entry 18
Exit 17
Entry 19
Exit 18
Exit 19
Rules executed
testSubFlowForEach.rf looks like this
<?xml version="1.0" encoding="UTF-8"?>
<process xmlns="http://drools.org/drools-5.0/process"
xmlns:xs="http://www.w3.org/2001/XMLSchema-instance"
xs:schemaLocation="http://drools.org/drools-5.0/process
drools-processes-5.0.xsd"
type="RuleFlow" name="testForEach" id="processForEach"
package-name="com.sample" >
<header>
<imports>
<import name="java.util.ArrayList" />
<import name="com.sample.IntegerObject" />
</imports>
<variables>
<variable name="numberList" >
<type
name="org.drools.process.core.datatype.impl.type.ObjectDataType"
className="java.util.ArrayList" />
</variable>
<variable name="integerObject" >
<type
name="org.drools.process.core.datatype.impl.type.ObjectDataType"
className="com.sample.IntegerObject" />
</variable>
</variables>
</header>
<nodes>
<start id="1" name="Start" x="224" y="15" width="80" height="40" />
<forEach id="2" name="processForEach" x="163" y="111" width="203"
height="268" variableName="integerObject" collectionExpression="numberList"
>
<nodes>
<subProcess id="13" name="SubProcess" x="55" y="110" width="80"
height="40" processId="testSubFlow" independent="false" >
<mapping type="in" from="integerObject" to="integerObject" />
<onEntry>
<action type="expression" dialect="java" >System.out.println("Entry
" + ((IntegerObject) integerObject).getIntVal());</action>
</onEntry>
<onExit>
<action type="expression" dialect="java" >System.out.println("Exit "
+ ((IntegerObject) integerObject).getIntVal());</action>
</onExit>
</subProcess>
</nodes>
<connections>
</connections>
<in-ports>
<in-port type="DROOLS_DEFAULT" nodeId="13"
nodeInType="DROOLS_DEFAULT" />
</in-ports>
<out-ports>
<out-port type="DROOLS_DEFAULT" nodeId="13"
nodeOutType="DROOLS_DEFAULT" />
</out-ports>
</forEach>
<end id="5" name="End" x="230" y="456" width="80" height="40" />
</nodes>
<connections>
<connection from="1" to="2" />
<connection from="2" to="5" />
</connections>
</process>
http://drools-java-rules-engine.46999.n3.nabble.com/file/n870012/testForE...
testForEach.zip
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16 years, 1 month
Use Drools-Guvnor .pkg
by Josua
Hi,
I’m new to drools, just started evaluating Drools-Guvnor for a project. To
take advantage of Java-enums I’m using the current 5.1.0 Milestone 2.
I created a decision table (web-guided) in drools-guvnor and deployed the
package snapshot, which is downloadable and returns a .pkg-File. This File
is in some Binary format (non plaintext). When I try to load that package in
code using a KnowledgeAgent it fails on the following code line:
knowledgeAgent.applyChangeSet(resource);
with an Exception: “java.lang.RuntimeException: Unable to parse ChangeSet …
Caused by: org.xml.sax.SAXParseException: Content is not allowed in
prolog.”.
I debugged it, and it seems to try to parse XML content from this binary
file..
Can anyone tell me the proper way to load a package from a remote Guvnor
installation?
Thx!
Complete code:
KnowledgeAgent knowledgeAgent =
KnowledgeAgentFactory.newKnowledgeAgent("testAgent");
UrlResource resource = (UrlResource) ResourceFactory.newUrlResource(url);
resource.setBasicAuthentication("enabled");
resource.setUsername("whatever");
resource.setPassword("");
knowledgeAgent.applyChangeSet(resource);
KnowledgeBase knowledgeBase = knowledgeAgent.getKnowledgeBase();
Stacktrace:
java.lang.RuntimeException: Unable to parse ChangeSet
at
org.drools.agent.impl.KnowledgeAgentImpl.getChangeSet(KnowledgeAgentImpl.java:323)
at
org.drools.agent.impl.KnowledgeAgentImpl.applyChangeSet(KnowledgeAgentImpl.java:130)
at
com.efgfp.hermes.drools.test.DroolsTest.testDroolsDecisionTable(DroolsTest.java:37)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at
org.testng.internal.MethodHelper.invokeMethod(MethodHelper.java:644)
at
org.testng.internal.MethodHelper$1.runTestMethod(MethodHelper.java:762)
at
org.springframework.test.context.testng.AbstractTestNGSpringContextTests.run(AbstractTestNGSpringContextTests.java:140)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at
org.testng.internal.MethodHelper.invokeHookable(MethodHelper.java:770)
at org.testng.internal.Invoker.invokeMethod(Invoker.java:539)
at
org.testng.internal.Invoker.invokeTestMethod(Invoker.java:700)
at
org.testng.internal.Invoker.invokeTestMethods(Invoker.java:1002)
at
org.testng.internal.TestMethodWorker.invokeTestMethods(TestMethodWorker.java:137)
at
org.testng.internal.TestMethodWorker.run(TestMethodWorker.java:121)
at org.testng.TestRunner.runWorkers(TestRunner.java:908)
at org.testng.TestRunner.privateRun(TestRunner.java:617)
at org.testng.TestRunner.run(TestRunner.java:498)
at org.testng.SuiteRunner.runTest(SuiteRunner.java:329)
at org.testng.SuiteRunner.runSequentially(SuiteRunner.java:324)
at org.testng.SuiteRunner.privateRun(SuiteRunner.java:296)
at org.testng.SuiteRunner.run(SuiteRunner.java:201)
at org.testng.TestNG.createAndRunSuiteRunners(TestNG.java:915)
at org.testng.TestNG.runSuitesLocally(TestNG.java:879)
at org.testng.TestNG.run(TestNG.java:787)
at org.testng.remote.RemoteTestNG.run(RemoteTestNG.java:75)
at
org.testng.RemoteTestNGStarter.main(RemoteTestNGStarter.java:79)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at
com.intellij.rt.execution.application.AppMain.main(AppMain.java:110)
Caused by: org.xml.sax.SAXParseException: Content is not allowed in prolog.
at
com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.createSAXParseException(ErrorHandlerWrapper.java:195)
at
com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.fatalError(ErrorHandlerWrapper.java:174)
at
com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(XMLErrorReporter.java:388)
at
com.sun.org.apache.xerces.internal.impl.XMLScanner.reportFatalError(XMLScanner.java:1411)
at
com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl$PrologDriver.next(XMLDocumentScannerImpl.java:1038)
at
com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(XMLDocumentScannerImpl.java:648)
at
com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.next(XMLNSDocumentScannerImpl.java:140)
at
com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentScannerImpl.java:510)
at
com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:807)
at
com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:737)
at
com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLParser.java:107)
at
com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(AbstractSAXParser.java:1205)
at
com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(SAXParserImpl.java:522)
at javax.xml.parsers.SAXParser.parse(SAXParser.java:395)
at
org.drools.xml.ExtensibleXmlParser.read(ExtensibleXmlParser.java:295)
at
org.drools.xml.ExtensibleXmlParser.read(ExtensibleXmlParser.java:174)
at
org.drools.xml.XmlChangeSetReader.read(XmlChangeSetReader.java:49)
at
org.drools.agent.impl.KnowledgeAgentImpl.getChangeSet(KnowledgeAgentImpl.java:320)
... 36 more
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16 years, 1 month
Object Referencing error:
by Fnu Mahalakshmi
Hi,
I am getting the following error when I try to do complex object referencing in drools:
My class:
A{
String Type;
B objectb;
//getters and setters for above
}
My rules:
rule "prod"
when
$a :A(Type == "Prod" , objectB != "")
then
B bobject = new B();
bobject.setType( "Prod" );
bobject.setId($a.getNumber().getId());
update(bobject);
end
I want to basically output a file which has updated values of B (type, Id)
Error:
org.drools.spi.ConsequenceException: org.drools.FactException: Update error: handle not found for object: com.org.Ip@f42ad0. Is it in the working memory?
at org.drools.base.DefaultConsequenceExceptionHandler.handleException(DefaultConsequenceExceptionHandler.java:13)
at org.drools.common.DefaultAgenda.fireActivation(DefaultAgenda.java:558)
at org.drools.common.DefaultAgenda.fireNextItem(DefaultAgenda.java:518)
at org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:475)
at org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:439)
at com.org.DroolsTest.main(DroolsTest.java:30)
Caused by: org.drools.FactException: Update error: handle not found for object: com.org.Ip@f42ad0. Is it in the working memory?
at org.drools.base.DefaultKnowledgeHelper.update(DefaultKnowledgeHelper.java:100)
at com.org.Rule_Prod_Ip_0.consequence(Rule_Prod_Ip_0.java:10)
at com.org.Rule_Prod_Ip_0ConsequenceInvoker.evaluate(Rule_Prod_Ip_0ConsequenceInvoker.java:22)
at org.drools.common.DefaultAgenda.fireActivation(DefaultAgenda.java:554)
... 4 more
Please help! I am very new to drools! Not able to figure out why this error:
I am using eclipse and working on Windows machine. Error above was generated on eclipse console.
Thank you.
M
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16 years, 1 month
