Drools Decision Table
by Riyaz Saiyed
Hi,
I'm doing a POC on drools decision table. We need to develope pricing
engine for few of our products. I created xls with list of products and
their price as per drools format. When I load xls and run the rules, the
price were picked up correctly against mathing product, customer and
quantity criteria.
Now I want to save the executed rule so the if there is any modification
in quantity (increase/decrease), I can calculate the price again based
on earlier executed rule and not from xls.
I think to achieve the, I need to store the "rule" against every order
for each product.
Can any one suggest me, how I can get the string representation of the
executed rule so that I can create .drl file from that string and run
the same rule again for any order modification.
I've looked at SpreadsheetCompiler and was able to get the string of all
the rules as a result of compile method.
Note - I can not read xls again for order modification because, if in
between the price in xls has changed, the engine should still pick the
old price.
Thanks,
Riyaz
15 years, 3 months
how to run pkg from java
by MichaelBini
Hi ,
I Build few classes using Eclipse and then import it into "JBoss BRMS"
then I created few rule and and using "knowledge base" I created binary
package.
I try to open the pkg using Eclipse with this code :
Collection<KnowledgePackage> kpkgs = new ArrayList<KnowledgePackage>();
ObjectInputStream in = new ObjectInputStream(new FileInputStream(
"c:/com.jspeed.brms.fire.pkg"));
Object o = in.readObject();
System.out.println("Read: pkg ok ");
in.close();
KnowledgePackage kp = (KnowledgePackage) o;
kpkgs.add(kp);
KnowledgeBase kbase = KnowledgeBaseFactory.newKnowledgeBase();
kbase.addKnowledgePackages(kpkgs);
and I am getting error -
java.io.ObjectInputStream cannot be cast to
org.drools.common.DroolsObjectInput
What am I doing wrong ?
My imports :
import java.io.FileInputStream;
import java.io.ObjectInputStream;
import java.util.ArrayList;
import java.util.Collection;
import java.util.HashMap;
import java.util.Map;
import org.drools.KnowledgeBase;
import org.drools.KnowledgeBaseFactory;
import org.drools.definition.KnowledgePackage;
import org.drools.runtime.StatefulKnowledgeSession;
import org.drools.runtime.rule.FactHandle;
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15 years, 3 months
How to add java logics in the LHS of a rule ?
by carnelk
Hi,
I have to rule below.
This rule finds the minimal date of a 'B object' that is still AFTER the
startDate of $aObject.
I would like it to find the minimal date of B that is at least 7 days after
the startDate of $aObject
(and perhaps no more then 14 days after).
For that I would need to add some java logics instead of line <9> to
manipulate the date with java,
wouldn't I?
Does anyone have any creative solution for that ???
1 rule "first measurement < 7 days> after the treatment"
2 salience 9
3 when
4 $aObject : A ( )
5 $minDate : Number()
6 from accumulate ( B (
7 # I would like to change the following line to
manipulate $aObject.startDate
8 # to be '$aObject.startDate + 7 days'
9 date > $aObject.startDate,
10 $bpDate : date),
11 min($bpDate.getTime()) )
12
13 then
14 # do something ....
15 end
Much thanks,
Carmel.
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15 years, 3 months
Drools rules
by annukaila
Hi
iam new to drools rules my problem is
iam receiving message in xml format so using drools have to route it my
drools rules work when the xml message is the format as below
<?xml version="1.0" encoding="UTF-8"?>
<IATA>
<messageaudit senderId="125" receiverId="FFCategory"
dateTimeOfMessage="19:00"
messageVersion="FSU/13/RCS" airwaybill="125-1234565" />
<fsurcs AwbNumber="125-1234565" origin="HYD" destination="KUL"
totalPieces="T40" totalWeight="K200"
statusCodeConsignmentRecieveDFromShipperOrAgent="RCS"
dayAndMonthOfReceipt="02June" actualTimeOfGivenStatusEvent="19:00"
airportCodeOfReceipt="HYD"
totalOrPartNumberOfPices="T40" weightOfTotalOrPartOfPieces="K200"
nameOfAgentOfShipper="Shipper" osi="RcsMessage"/>
</IATA>
but if the xml is the format as below
<?xml version="1.0" encoding="UTF-8"?>
<IATA>
<messageaudit>
<senderId>125</senderId>
<receiverId>FFCategory</receiverId>
<dateTimeOfMessage>19:00</dateTimeOfMessage>
<messageVersion>FSU/13/RCS</messageVersion>
<airwaybill>125-1234565</airwaybill>
</messageaudit>
<fsurcs>
<AwbNumber>125-1234565</AwbNumber>
<origin>HYD</origin>
<destination>KUL</destination>
<totalPieces>T40</totalPieces>
<totalWeight>K200</totalWeight>
<statusCodeConsignmentRecieveDFromShipperOrAgent>RCS</statusCodeConsignmentRecieveDFromShipperOrAgent>
<dayAndMonthOfReceipt>02June</dayAndMonthOfReceipt>
<actualTimeOfGivenStatusEvent>19:00</actualTimeOfGivenStatusEvent>
<airportCodeOfReceipt>HYD</airportCodeOfReceipt>
<totalOrPartNumberOfPices>T40</totalOrPartNumberOfPices>
<weightOfTotalOrPartOfPieces>K200</weightOfTotalOrPartOfPieces>
<nameOfAgentOfShipper>Shipper</nameOfAgentOfShipper>
<osi>RcsMessage</osi>
</fsurcs>
</IATA>
it is not routing the message means not recognizing the drools and my drools
file is as follows
package com.jboss.soa.esb.routing.cbr
#list any import classes here.
import org.jboss.soa.esb.message.Message;
import org.jboss.soa.esb.message.format.MessageType;
expander XPathLanguage.dsl
#declare any global variables here
global java.util.List destinations;
rule "Blue Routing Rule using XPATH"
when
xpathEquals "/IATA/messageaudit/@messageVersion" "FSU/13/RCS"
then
Log : "Blue Team";
Destination : "blue";
end
rule "Red Routing Rule using XPATH"
when
xpathEquals "/IATA/messageaudit/@messageVersion" "FSU/13/MAN"
then
Log : "Red Team";
Destination : "red";
end
rule "Green Routing Rule using XPATH"
when
xpathEquals "/IATA/messageaudit/@messageVersion" "FSU/13/DEP"
then
Log : "Green Team";
Destination : "green";
end
please help me hoe to rectify this its very urgent for me and please dnt
mind if i did any mistakes
thanku
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15 years, 3 months
Drools Rule verifier background
by Steffen Heublein
Hello,
I am currently using the Rule Verifier and am quite happy so far. Yet I
am interested in its (scientific) background background, but I am unsure
where to start. Are there any papers on the topic or anything else I
could relate to? There certainly is, but I don't really know what topic
I should look for to find what I want. My special interest so far is the
solving of the rule conditions and how the system finds out how e.g. two
rule conditions are equivalent.
Cheers, and thanks so far,
Steffen
15 years, 3 months
Need JSON request for Drools Server
by fulton
I have deployed Drools Server 5.1.1 on Tomcat and have successfully tested it
with the sample Test.jsp and with a raw XML <batch-execution> request via
TCPMON. However, I need to support JSON-based requests to the server, and I
have been unable to find any documentation or examples on how to specify a
valid JSON request to the server. Would someone please translate the sample
XML request to a JSON request that actually WORKS on the Drools Server.
<batch-execution lookup="ksession1">
<insert out-identifier="message">
<org.test.Message>
<text>Hello World</text>
</org.test.Message>
</insert>
</batch-execution>
BTW, I am behind a corporate proxy, so I cannot access certain web sites
(including plugtree.com!), but go ahead and point me to the "proper"
documentation for this, if any.
Thanks so much! Fulton
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15 years, 3 months
Problem in compiling each rule separately
by saurabh maheshwari
Hi sir ,
I have 10 rules . rules are created dynamically .Now if any of them is
causing problem so none of them runs
so I want to compile each rule separately , so that i can create knowledge
base with rules which have no errors
but can i do this ?
I am not finding the way how i can do it . is it possible ?
thanks ,
Saurabh Maheshwari
15 years, 3 months
[guvnor] How to use a rule in a java application
by Mario Viertel
Hi all,
I am new in Guvnor and have a lot of questions.
I have created a decision table with the Guvnor web app. I have also
created some test. All seems to be fine.
Now I want to use the rules in a web application. Unfortunately Guvnor
doesn't provide a web service interface so I must develop an own web
service to deal with the rules. But thats not so easy ...
In the Guvnor documentation I can see how to create KnowledgeBases and
builders and how to fire rules. But I cannot see how to receive rule
results.
Example:
The decision table looks similar like this:
rule 1 "under age"
if person.age < 18 then "under age"
rule 2 "pensioner female"
if person.age > 64 and person.gender == "female" then "pensioner"
rule 3 "pensioner male"
if person.age > 67 and person.gender == "male" then "pensioner"
rule 4 "full age"
* then "full age"
In my java application I create a person object:
Person p = new Person();
p.setBirthday(...);
p.setGender(...);
Now I miss a method in the Guvnor api to exectute the rules and receive
the result like this:
Person result = (Person) rules.execute(p);
Can somebody explain how to execute a rule and receive the result.
Thanks in Advance
Mario Viertel
Germany
15 years, 3 months
And Or Problem
by saurabh maheshwari
Hi sir ,
I am facing one issue regarding and( , ) and OR( || ) condition
i have one rule like that
dialect "java"
rule "mytest1"
when
test ( ( i==1,j==2) || (i == 2 ,j==3) )
then
System.out.println("Found");
end
it gives excpetion [ERR 102] Line 24:22 mismatched input ',' expecting
'then' in rule "mytest1"
can we not do such type of combination ?
dialect "java"
rule "mytest1"
when
test (( i==1 || j==2) ,(i == 2 || j==3))
then
System.out.println("Found");
end
this gives no excpetion and works as expected .
Regards ,
Saurabh Maheshwari
15 years, 3 months
Re: [rules-users] unable to create field extractor for tickerId
by FrankVhh
"Unable to create FIeld extractor", mostly that is because you did not
declare getters and in your java class.
Drools uses the getters to extract the needed values.
Make sure you use the correct naming conventions as well. I.e. public int
getTicketId(){...}
Regards,
frank
sirinath wrote:
>
> declare ReqMktData
> @role( event )
> end
>
> declare TickPrice
> @role( event )
> @expires( 2m )
> end
>
> declare TickSize
> @role( event )
> @expires( 2m )
> end
>
>
> rule "Bids"
>
> when
> $req: ReqMktData($tickerId : tickerId) from entry-point "IB Events"
> $bidprice: TickPrice(field == 1, tickerId == $tickerId, this after $req)
> from entry-point "IB Events"
> $bidsize: TickSize(field == 0, tickerId == $tickerId, this after $req)
> from entry-point "IB Events"
> then
> Bid bid = new Bid($tickerId, $req.contract, size, price);
> insert(bid);
> end
>
>
>
>
>
>
> public class ReqMktData {
> public int tickerId;
> public Contract contract;
> public String genericTickList;
> public boolean snapshot;
> }
>
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15 years, 3 months
