February 2010 - rules-users - Jboss List Archives

Retrieve the rule name from the LHS of a rule

by Malinda Kaushalye

Hi All, How do I access the rule name from the LHS of a rule. drools.getRule().getName() works only in RHS. This issue has been raised earlier but there was no answer. http://www.mail-archive.com/user@drools.codehaus.org/msg01720.html Also I'd like to know the Cheers, Malinda

14 years, 2 months

2
1
0 / 0

Can I do a Collection contains Collection?

by EdenAEL20

I have an object coming in which contains a collection of id's. I want to verify these id's are in another collection. I'm looking for something like collection is a subset of another collection. any ideas?? zips below is a collection, i want to verify that each zip is in $e1. rule "example" when e1: Set() from RefData.getConstantValues() e2: Example( zips not in $e1) then error() -- View this message in context: http://n3.nabble.com/Can-I-do-a-Collection-contains-Collection-tp217546p2... Sent from the Drools - User mailing list archive at Nabble.com.

14 years, 2 months

4
7
0 / 0

Rule in decision table

by Jeffrey Schneller

I am trying to write a condition for a decision table and can't seem to figure out how to do it. I have a global variable called area. This is in sq. ft. I have a fact called Item which has an attribute called weight. This is in grams / sq. ft. The Item comes from the attribute called value from a fact named Choice where the sku attribute matches what is in the rule I want to compare the (weight * area) to the parameter for the row. The parameter is being passed in as lbs. Here is what I tried for my three condition columns: CONDITION CONDITION CONDITION mm : Choice sku exists(Item(weight * area > ($param * 453.5924)) from mm.value) exists(Item(weight * area <= ($param * 453.5924)) from mm.value) This did not work. This will work if I remove the formula and just do something like exists(Item(weight > $param) from mm.value). So the syntax is correct except for the comparison that I want to do. Any ideas on how to do this? Thanks.

14 years, 2 months

2
1
0 / 0

Authorizing the binary package URL - Drools Guvnor

by Sartaj Shaik

Hi, I am new to drools guvnor and I have a question regarding the authorization of binary package. To use the rule agent, we have to call it something like.. RuleAgent agent = RuleAgent.newRuleAgent("/MyRules.properties"); RuleBase rb = agent.getRuleBase(); Following is the MyRules.properties ## ## RuleAgent configuration file example ## newInstance=true url=http: //localhost:8080/drools-guvnor/org.drools.guvnor.Guvnor/package/XYZ/LATEST localCacheDir=/foo/bar/cache poll=30 name=XYZAgent Any one who know this URL(http: //localhost:8080/drools-guvnor/org.drools.guvnor.Guvnor/package/XYZ/LATEST) can dowload my package/drl. So how can we protect it from unauthorized access. Thanks Sartaj. =====-----=====-----===== Notice: The information contained in this e-mail message and/or attachments to it may contain confidential or privileged information. If you are not the intended recipient, any dissemination, use, review, distribution, printing or copying of the information contained in this e-mail message and/or attachments to it are strictly prohibited. If you have received this communication in error, please notify us by reply e-mail or telephone and immediately and permanently delete the message and any attachments. Thank you

14 years, 2 months

2
1
0 / 0

Handling listeners when KnowledgeAgent builds new KnowledgeBase

by ljnelson

I notice that at line 372 in KnowledgeAgentImpl that a new KnowledgeBase is built in place of the old one. This is fine, but the listeners and other objects that are added to the old one are not carried over, or explicitly removed. Nor is there a notification (other than a debug message) that such a rebuild is taking place. I suspect this is a bug. What do people think? Best, Laird -- View this message in context: http://n3.nabble.com/Handling-listeners-when-KnowledgeAgent-builds-new-Kn... Sent from the Drools - User mailing list archive at Nabble.com.

14 years, 2 months

2
1
0 / 0

Application based rule management

by Luiz Eduardo Guida Valmont

Hi all, >From what I could grasp after looking at the Guvnor documentation, it provides no API. Since it would be a (very) bad idea to re-develop such (complex) simple feature, I'm wondering whether there is an API to manage a set of rules, poll it for changes and update it accordingly. I cannot use RuleAgent from drools-core since its underpinnings require that all rules from a package be written in a single file (considering automatic loading of all rules in a directory). I could dive into the code and adapt the scanners to do what I want but that's not as feasible as I'd like it to be. It's better to just use something that's been developed and tested. Any ideas/thoughts? Regards, Luiz Valmont

14 years, 2 months

3
2
0 / 0

Drools Flow: Variable Persistence Strategies

by Dale Wyttenbach

I'm trying to adapt the StringVariablePersister presented in http://blog.athico.com/2009/09/drools-flow-variable-persistence.html <http://blog.athico.com/2009/09/drools-flow-variable-persistence.html>I can create process instances with variable "color": private static WorkflowProcessInstance startProcess(StatefulKnowledgeSession ksession, String color) { Map<String, Object> vars = new HashMap<String, Object>(); vars.put("color", color); WorkflowProcessInstance p1 = (WorkflowProcessInstance) ksession.startProcess("com.sample.ruleflow", vars); return p1; } I can count them: select count(*) from ProcessInstanceInfo However I'm stymied as to counting process instances with a given color, as there appears to be no join column between ProcessInstanceInfo and VariableInstanceInfo. Can such a query be written? Thanks.

14 years, 2 months

3
15
0 / 0

What is the Best practice of using "Drools Fusion" in a Load balancing environment (ie temporal reasoning between 2 working memories)??

by Chetan Mahadev

Hi Can anyone tell me how to Implement temporal based event correlation using drools fusion in a load balancing environment. What is the best practice in a situation like this?? Use case : To correlate events which comes into the system with in a time window. Scenario1: Single System Scenario: that is One working memory 1.All the events come into the system, 2.Temporal based rules are written using Drools-Fusion. 3.Correlations takes place if all the events come with in the time window, else the rule expires. Note: All these takes place with in a single working memory ( Single System) Scenario2: Two System Scenario in active/active: that is two working memories 1.All the events come into the system, 2.Temporal based rules are written using Drools-Fusion. 3. Same rules are deployed in both the systems (active/active) 4.Both systems are load-balanced, 5. Event1 goes to System1, Event2 goes to System2 and again Event3 goes system1. ( load -balanced) As a result, System1 recieves 2 events out of 3 events, and System2 the other 1 event. Correlation never happens since I dont recieve all the events in a single working memory. How do we handle this kinda scenario?? Do we have any best practise that is followed in a clustered or load-balanced environment?? Pls help me.. I am stuck. Regds Chetan In a single system, Fusion/temporal based correlation works completely fine. Use case: I have a situation, where events flow into two active components (both running simultaneosly)

14 years, 2 months

2
1
0 / 0

How to use Drools 5 TimeMachine for controlling effective dates?

by H.C.

Hey, I have a use case where we need to retroactively process data using rules, but with the rules that were effective at the time the data was created (maybe a year ago), not at the time the data is run through the engine (today). We are setting effective and expiration dates on our rules to accomplish this. I am now trying to figure out how to control the date the agenda sees against which it evaluates which rules are in effect. I understand the TimeMachine class is part of this control mechanism but I am not sure how to properly use it in the context of a session. We may have multiple stateless sessions executing at the same time and each session needs its own independent control over its date parameter. Thanks HC -- View this message in context: http://n3.nabble.com/How-to-use-Drools-5-TimeMachine-for-controlling-effe... Sent from the Drools - User mailing list archive at Nabble.com.

14 years, 2 months

1
0
0 / 0

Drools

by Nilima R

Hi All , How to prevent the below important URL information available while building rule packages from unauthorized access. URL for package source: http://localhost:8080/drools-guvnor/org.drools.guvnor.Guvnor/package/test... URL for package binary: http://localhost:8080/drools-guvnor/org.drools.guvnor.Guvnor/package/test... URL for running tests: http://localhost:8080/drools-guvnor/org.drools.guvnor.Guvnor/package/test... Status: . Nilima ____________________________________________ Experience certainty. IT Services Business Solutions Outsourcing ____________________________________________ =====-----=====-----===== Notice: The information contained in this e-mail message and/or attachments to it may contain confidential or privileged information. If you are not the intended recipient, any dissemination, use, review, distribution, printing or copying of the information contained in this e-mail message and/or attachments to it are strictly prohibited. If you have received this communication in error, please notify us by reply e-mail or telephone and immediately and permanently delete the message and any attachments. Thank you

14 years, 2 months

2
1
0 / 0

2024

2023

2022

2021

2020

2019

2018

2017

2016

2015

2014

2013

2012

2011

2010

2009

2008

2007

2006

rules-users February 2010