October 2011 - rules-users - Jboss List Archives

Drools & jBPM Boot Camp (Healthcare Focus) : San Francisco Oct 2011

by Mark Proctor

http://blog.athico.com/2011/10/drools-jbpm-boot-camp-healthcare-focus.html --- Interested in HL7? Semantic Ontologies with OWL-DL? Want to know how to improve your healthcare services with Open source? THEN SIGN UP NOW!!! :) As previously reported <http://blog.athico.com/2011/09/drools-jbpm-boot-camp-healthcare-focus.html>the date is very close now for RulesFest <http://rulesfest.org>as well as the co-located Drools & jBPM tech and healthcare days. Spaces are filling up fast, so register quickly!!! We have a full plethora of speakers and talks now. Please take a look at the updated details below, for a full list of talks and speaker bios. You can get the most up to date information from the wiki page (which is copied below): http://community.jboss.org/wiki/DroolsJBPMBootCampHealthcareFocusSanFranc... Mark * Logistics <http://community.jboss.org/wiki/DroolsJBPMBootCampHealthcareFocusSanFranc...> * Previous Boot Camps <http://community.jboss.org/wiki/DroolsJBPMBootCampHealthcareFocusSanFranc...> * Agenda <http://community.jboss.org/wiki/DroolsJBPMBootCampHealthcareFocusSanFranc...> + Mon - Wed (Rules Fest) <http://community.jboss.org/wiki/DroolsJBPMBootCampHealthcareFocusSanFranc...> + Thu (Drools & jBPM, Free) <http://community.jboss.org/wiki/DroolsJBPMBootCampHealthcareFocusSanFranc...> + Fri (Drools & jBPM & Healthcare, Free) <http://community.jboss.org/wiki/DroolsJBPMBootCampHealthcareFocusSanFranc...> * Speaker Bios <http://community.jboss.org/wiki/DroolsJBPMBootCampHealthcareFocusSanFranc...> + Emory Fry <http://community.jboss.org/wiki/DroolsJBPMBootCampHealthcareFocusSanFranc...> + Nathan Bell <http://community.jboss.org/wiki/DroolsJBPMBootCampHealthcareFocusSanFranc...> + Dave Walsh <http://community.jboss.org/wiki/DroolsJBPMBootCampHealthcareFocusSanFranc...> + John Koisch <http://community.jboss.org/wiki/DroolsJBPMBootCampHealthcareFocusSanFranc...> + Diego Naya <http://community.jboss.org/wiki/DroolsJBPMBootCampHealthcareFocusSanFranc...> + Davide Sottara <http://community.jboss.org/wiki/DroolsJBPMBootCampHealthcareFocusSanFranc...> + Mauricio Salatino <http://community.jboss.org/wiki/DroolsJBPMBootCampHealthcareFocusSanFranc...> + Mark Proctor <http://community.jboss.org/wiki/DroolsJBPMBootCampHealthcareFocusSanFranc...> + Kris Verlaenen <http://community.jboss.org/wiki/DroolsJBPMBootCampHealthcareFocusSanFranc...> + Edson Tirelli <http://community.jboss.org/wiki/DroolsJBPMBootCampHealthcareFocusSanFranc...> + Ray Ploski <http://community.jboss.org/wiki/DroolsJBPMBootCampHealthcareFocusSanFranc...> Hyatt Regency San Francisco.jpg <http://community.jboss.org/servlet/JiveServlet/showImage/102-17205-22-170...> *The Drools & jBPM event is free, but you MUST BE REGISTERED to attend. Registration is from the main rulesfest website, here - <http://rulesfest.org/html/registration.html>http://rulesfest.org/html/registration.html. <http://rulesfest.org/html/registration.html>* Logistics *Where* * Hyatt Regency, Burlingame, San Francisco, CA *When* * Rules Fest - October 2011 - Mon 24th to Wed 26th * Drools & jBPM Boot Camp - October 2011 - Thu 27th to Fri 28th o Thu general tech for Drools & jBPM rules, workflow, event processing, ontologies o Fri Healthcare focus *What* * Rules Fest o General reasoning technologies, rules, workflow, agents, ontologies, uncertainty. * Drools & jBPM Boot Camp o Thu general tech for Drools & jBPM rules, workflow, event processing, ontologies o Fri Healthcare focus *Time * * Monday to Friday 9am to 6pm *Price* * Rules Fest (Mon - Wed) see here - <http://rulesfest.org/html/registration.html>http://rulesfest.org/html/registration.html * Drools & jBPM Boot camps (Thu - Fri) *FREE* o The event is free, but you must be registered to attend here - <http://rulesfest.org/html/registration.html>http://rulesfest.org/html/registration.html *Accomodation* * Discounted Room block available, see here - <http://rulesfest.org/html/registration.html>http://rulesfest.org/html/registration.html *Contact Details* * Rules Fest - Jason Morris - info at rulesfest d0t org * Drools & jBPM (general) - Prakash Aradhya - paradhya at redhat d0t com * Drools & jBPM (technical) - Mark Proctor - mproctor at codehaus d0t com Previous Boot Camps Drools Boot Camp : San Diego April 2010 <http://community.jboss.org/docs/DOC-14964> Drools Boot Camp : San Francisco June 2009 <http://community.jboss.org/docs/DOC-13468> Agenda *Mon - Wed (Rules Fest)* General talks covering a variety of topics related to reasoning systems, rules, workflow, agents, ontologies, uncertainty. Paul Haley will give the key note (not to be missed) "Paul Haley to Keynote Rules Fest" <http://blog.athico.com/2011/07/paul-haley-to-keynote-rules-fest.html>. Rest of agenda see here http://rulesfest.org/html/agenda.html <http:///> *Thu (Drools & jBPM, Free) * General Drools & jBPM day with presenters from Red Hat and core community members. This day is suitable for all and will provide an introduction and overview to Drools and jBPM and how they are used. *Name * *Company * *Subject* *Presentation Title* Mark Proctor Red Hat Drools Expert (rules) Introduction to what a Rule Engine is and the capabilities of Drools Expert. This will cover both the Drools technical language and Decision Table theory. EdsonTirelli Red Hat Drools Fusion (CEP) Complex Event Processing facilitates event correlation and temporal comparison. Fusion extends Drools to provide capabilities. Come learn what , what type of problems it helps solve and how it's done with Drools. Mauricio Salatno Plugtree jBPM (workflow) Introduction to what BPMN2 is, why it matters and how jBPM works. Ray Ploski Red Hat Guvnor (web tooling/brms) Guvnor provides server side knowledge mangement, authoring and deployment capalities. This talk introduces these conts and provides live demos of everything coming together. Davide Sottara US Navy Healthcare Drools Expert (Semantics and Ontologies) What are semantic ontologies and what research is underway with Drools to help. Will also introduce the base foundation of Traits, which provides dynamic and type safe duck typing. Mark Proctor Red Hat Drools Expert (rules) Learn how to write Adventure games with Drools. *Fri **(Drools & jBPM & Healthcare, Free)* Healthcare focus, especially clinical. This day will be predominantly industry lead with professionals doing most of the talks. None healthcare people are welcome to join, but be aware that this day is specialised for a focus on healthcare problems. Titles and abstracts are still being fleshed out and subject to change, check back regularly for changes. *Name * *Company * *Presentation Title and Abstract * Emory Fry US Navy Healthcare *Drools Enhancements In Support of Real-Time Clinical Decision Support.* Distributed Decision Support Services and Knowledge Management Repository (KMR-II) is a second generation Clinical Decision Support (CDS) platform for healthcare environments. This presentation will provide a brief overview of the overall architecture and then discuss in more detail specific enhancements to Drools that enables it to better support rule execution using standards-based object models, semantics, and data structures. KMR extends Drools with PredictiveModel Markup Language (PMML), Grid Services, and Semantic Web technologies within an agent architecture. KMR-II provides integrated knowledge management, analytic, and predictive modeling capabilities critical to the immediate and long-term care of our patients. As a sophisticated, standards-based Clinical Decision Support environment, it is uniquely suited to deliver "knowledge services" that can be layered on a variety of health information networks. Diego Naya OSDE *Improving Healthcare customer service with Drools and jBPM5* Mauricio Salatino Plugtree *Emergency Services in action.* The application was created to represent complex scenarios that are being exe-cuted by an Emergency Services company that deals with concurrent emergencies within a city. The company needs to solve different situations where different entities need to be coordinated to deal with an emergency situation. The Emergency Services Application shows how we can provide a tool that helps the company to improve their services by giving them full visibility of their actions, traceability of their resources, suggestions and advice based on the con-text without sacrifficing any degree of exibility that they need to solve real life situations. Nathan Bell Pharmacy OneSource *Speed Saves Lives: Leveraging a massively parallel expert system for patient surveillance* Pharmacy OneSource is a SaaS provider of applications for hospital pharmacy and infection prevention professionals. This case study will discuss the steps taken to develop a next-generation patient surveillance platform that allows clinicians to accurately detect risk factors, and perform interventions. The platform leverages the GigaSpaces implementation of Tuple-space and the Drools rule engine to create a massively parallel expert system. This architecture allows for customizable handling of millions of HL7 messages per day, evaluation of thousands of clinician created business rules, and reasoning over hundreds of thousands of patient data facts to provide near-real-time surveillance. Dave Walsh eServices Group *Medicare and Medicaid look to rules for the future of healthcare* The Center for Medicare and Medicaid Services (CMS), an agency of the Federal government, has aggressive plans to modernize healthcare administrative systems and Electronic Healthcare Records (EHR). The use of Rules and Business Process Management are a focal point for the new systems. This session will describe how Medicare and Medicaid work and how the government (Federal and State) is looking for Rules and BPM to help change both the administrative and clinical environments. This session will look at the Medicaid Information Technology Architecture (MITA) and how Rules and BPM can augment this Service Oriented Architecture. We will discuss how to get involved in some of the many projects that are currently underway. John Koisch Commence Partners *Part 1 - Health IT, Informatics, and Rich Information Structures - working with ontologies in the Health space* 1.1) What Health IT is and what it isn't - why health IT is hard 1.2) Standards and Health IT - the RIM, vocabularies, CDA and standardizing information 1.3) The changing nature of Health IT - Disecting a typical health system design and why using ontologies makes sense 1.4) Why ontologies and information models are not enough - Why we need rule-based systems and architecture to build extensible IT solutions *Part 2 - Ontologies for the working Health IT shop - working with ontologies in a development and production environment* 2.1) Examining system design - using ontologies and rule-based systems with rich information structures in a distributed setting 2.2) Why good developers have trouble in Health IT - where java and other frameworks are great, and where rich information ties you down 2.3) An example rule based system - dealing with DVT in a clinical setting 2.4) Towards an industrial-strength development framework - Working with ontologies and rules in health IT Kris Verlaenen Red Hat *Clinical Pathways for doing Clinical Decision Support (CDS)* This presentation will describe how you can use /clinical pathways/ to describe the treatment of patients. The pathways are usually the combination of processes describing the overall plan (for example using a flow chart approach but other representations like a time-task-matrix are possible as well) and rules adding additional constraints. It takes advantages of some of the more advanced features of jBPM5 to create flexible and adaptive, domain-specific processes that integration closely with rules.* * Speaker Bios Emory Fry Emory Fry, MD, a neonatal intensive care specialist, has over 15 years of experience in the design and development of enterprise clinical information systems with a particular interest in cognitive science and clinical decision support, He is the Principle Investigator for both the Distributed Decision Support Services and Knowledge Management Repository (KMR) program and the real-time Closed-Loop Mechanical Ventilation initiative (SmartVent). His engineering team is actively enhancing the core Drools infrastructure for the purposes of creating an open-source real-time clinical decision support for healthcare. Current Drools projects include Drools Grid, terminology support, ontology integration, and a rule authoring workbench for clinical domain experts. Nathan Bell Nathan is Principal Architect at Pharmacy OneSource (Wolters Kluwer Health), a provider of SaaS applications for hospital pharmacy and infection prevention professionals. He has designed and implemented mission critical, near-real-time, high transaction volume systems in several industries including financial, medical, defense and telecommunications. He is currently involved in various projects within Wolters Kluwer Health to apply business rules technology to clinical decision support systems at the point of care. Dave Walsh Dave Walsh is CEO of eServices Group. eServices Group is a software development firm focused on supplying software products to meet the needs of Medicaid and Medicare for over 18 years. Mr. Walsh also chairs the MITA Technical Architecture Committee (TAC). The TAC is an industry collaborative that is focused on supporting the Federal government and States in the definition of the next generation Medicaid systems based on SOA, BPM and rules. John Koisch John Koisch has over 16 years of experience in information technology with 8 in healthcare IT. He has pioneered efforts at bringing health IT standards into the development space. John has worked at the strategic levels of a number of organizations, and has led architects and developers in a variety of health and life science integration projects. He is a principal in Guidewire, and directs its research efforts, product development, and standards engagements. Prior to joining Guidewire, John has held a variety of leadership and development roles in healthcare IT and standarards development organizations. He has developed a contract-driven development and system specification framework. He designed and led development in a Service Oriented Architecture to the DoD's Western Regional Medical Command. In addition to application architecture, he also contributed to the DOD's CDA Implementation Guide, participates in HL7 actively on various service-oriented projects, and has developed a framework for binding web services to HL7's rich information models. John has a bachelor's degree in physics / astronomy, with focuses on math from Texas Christian University and is certified in a number of relevant technologies. Diego Naya Diego Naya is the Application Development Manager for OSDE, Argentina's biggest healthecare company. He has extensive experience in BPMS and BRMS implementation in the healthcare industry. Diego wrote the book "OSWorkflow: A guide for implementing Business Processes" and several related articles. Mauricio Salatino Davide Sottara Davide is currently working as an independent private consultant and as a post-doc researcher at the University of Bologna, being involved the development of remote health-care systems, enhanced with AI-based predictive, diagnostic and planning features. In 2006, he has been awarded a SPINNER grant from the region Emilia Romagna, attending a post-graduate course in "Research, Innovation and Technology Transfer". Since 2006, he has been working on the development of intelligent DSSs in the environmental (in cooperation with the Italian National Agency for the Energy, Environment and New Technologies) and medical field and is a member of the Drools Community, leading a sub-project on the extension of production rule engines to support uncertain and fuzzy reasoning. Davide Sottara got his Ms. Degree (2006) and his Ph.D (2010) in Computer Science, Electronics and Telecommunications from the University of Bologna. His research and development interests include artificial intelligence in general and decision support systems in particular, focusing on hybrid systems combining predictive models and rule-based systems. Mauricio Salatino Mauricio has been a Drools and jBPM5 Community Contributor for more than three years now. As CTO of Plug Tree, he has been an active community member, trainer, developer and Open Source Software Evangelist. Mauricio is the author of the /jBPM Developer Guide for Packt Publishing (2009)/. He was a JBoss Community Award Winner 2011 (New Features -- Bug Fixes). blog: http://salaboy.wordpress.com <http://salaboy.wordpress.com/> Mark Proctor Mark Proctor received his B.S. Eng. in Engineer Science and Technology and then his M.S. in Business and Information Systems; both from Brunel University, West London. His M.S. thesis was in the field of Genetic Algorithms; which is where he first got his interest for anything AI related. Mark became involved in the Drools expert system project at an early stage and soon became its project lead. Mark then joined JBoss (later acquired by RedHat) as an employee when the Drools project was federated into the JBoss JEMS stack. Having developed a powerful expert system, Mark is now turning his attention to other declarative paradigms in an effort to unify them to allow for richer domain modeling environments. Kris Verlaenen Kris is a Software Engineer at JBoss, by Red Hat, where he leads on the jBPM project (an open-source business process management (BPM) suite), and is also part of the Drools project (an open-source Java rules engine). The jBPM project consists of a lightweight workflow engine in Java that support native BPMN 2.0 execution and various tools and features around that to support business processes throughout their entire life cycle. Kris did a PhD in Computer Science at the Katholieke Universiteit Leuven, Belgium. His main research area is policy-based management, i.e. using declarative policy rules for configuring services, resulting in highly-configurable, reusable services. He has experience and a great intrest in policy-based and rule-based systems, workflow management, service-oriented software development and clinical decision support. Edson Tirelli Edson Tirelli is a Senior Software Engineer at Red Hat with over 10 years of experience in the Middleware and Telecom Industries. He has been working on the Drools project (part of the JBoss Enterprise BRMS product) design and development for 5+ years and is the Lead Designer of the Drools Fusion CEP engine. Ray Ploski Ray Ploski is the Director of Application Platforms and Developer Strategy for JBoss. He has been an active contributor, consultant, developer, architect and trainer aiding organizations and companies adopt open source for the past fifteen years. Ray has been regularly recognized for his contributions in advancing the adoption of open source and is one of the few Red Hat employees to have earned the Chairman's Award[1] . In his current role he is responsible for JBoss's evangelism and developer programs.

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How to improve drools performance?

by arrehman

Is there a way to log / monitor the time taken for rule in a Drools rule set? Is there a way to make sure that one rule is not executed more than once(It seems to be happening in my case) What are the general guidelines on improving Drools performance? Currently I am using a one single DRL file with 100 odd rules. Any additiional information you need will be provided. Thanks, Abdul -- View this message in context: http://drools.46999.n3.nabble.com/How-to-improve-drools-performance-tp341... Sent from the Drools: User forum mailing list archive at Nabble.com.

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NPE in SlidingTimeWindow$SlidingTimeWindowComparator

by Rob Crawford

I'm getting a null pointer exception on either line 232 or 233 of SlidingTimeWindow. The only window I'm using is: rule "Mark up to date" timer(int: 5m) when $store: Store() exists (SensorReading (this.store == $store) over window:time(5m)) then ... end The rule never fires; this happens when the sliding time window is expiring tuples. It appears the comparator needs to handle nulls, but there's nothing in the JavaDocs about that.

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Re: [rules-users] Guvnor - Loading enums programatically using rule metadata

by GPatel＠tsys.com

I suppose I can use the standaloneEditor, add my data loader arguments to the URL, have a filter on the serverside set up a thread-local context that contains the arguments and have the data loaders use that context. How do I disable enum caching so that the above approach works? From: Ghanshyam Patel/Tempe/TotalSystem To: rules-users(a)lists.jboss.org Date: 10/11/2011 05:05 PM Subject: Re: Guvnor - Loading enums programatically using rule metadata I realize that "drools" is a runtime variable, available only during rule execution, but the question still stands. Is it possible to somehow pass in rule attributes as arguments to Data loaders for enums? Any help would be appreciated Thanks G. Patel From: Ghanshyam Patel/Tempe/TotalSystem To: rules-users(a)lists.jboss.org Date: 10/10/2011 03:35 PM Subject: Guvnor - Loading enums programatically using rule metadata The Guvnor manual specifies how to load enum data programtically but it seems like only other fields on the same Fact can be used to filter the values that can show up in the drop-down fields, as shown below: 'Fact.field[dependentField1, dependentField2]' : '(new com.yourco.DataHelper()).getListOfAges("@{dependentField1}", "@{dependentField2}")' Is it possible to somehow use other rule attributes, like package name or rule metadata to filter the list? Something like the following: 'Fact.field[dependentField1]' : '(new com.yourco.DataHelper()).getListOfAges("@{dependentField1}", drools.getRule().getMetaData().get("ID"))' Thanks G. Patel ----------------------------------------- The information contained in this communication (including any attachments hereto) is confidential and is intended solely for the personal and confidential use of the individual or entity to whom it is addressed. If the reader of this message is not the intended recipient or an agent responsible for delivering it to the intended recipient, you are hereby notified that you have received this communication in error and that any review, dissemination, copying, or unauthorized use of this information, or the taking of any action in reliance on the contents of this information is strictly prohibited. If you have received this communication in error, please notify us immediately by e-mail, and delete the original message. Thank you

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Typecasting problem

by hsherlock

I have a following scenario in which a complex logic (distributed over multiple .DRL files) need to process incoming jobs as fast as possible. A job definition looks something like describing what to do (type), what to process (item) with some additional data supplied (args). enum JobType { VALIDATE, SEND } class Job { String type; Object item; Object[] args; } In order to implement the processing I need to put the business logic into rules which fire depending on the kind of processing requested and type of the item passed: rule "process [VALIDATION] on [Document]" when $job: Job(type==JobType.VALIDATE) $doc: Document(issued==true) from $job.item then insert(new DocumentAlreadyIssuedFact()); end rule "process [SENDING] on [Message]" when $job: Job(type==JobType.SEND) $msg: Message() from $job.item then //do the sending end Unfortunately this does not work and results in ClassCastException being thrown, because it looks that Drools tries to cast any passed item to the class expected by the particular rule. In my opinion behaviour one can expect from Drools here is to first match the item class to the one expected by the rule and on success to perform the type casting. Is it a Drools bug or a missing feature? So after stidying the documention and example code I found only one way to workaround this – by using eval and instanceof which should have its performance implications due to extensive use of the eval. rule "process [VALIDATION] on [Message]" when $job: Job(type==”validate”) $msg: Message() from $job.item then //do the validation end rule "process [SENDING] on [Message]" when $job: Job(type==”send”) $msg: Message() from $job.item then //do the sending end Such an implementation works, but I see it as some form of workaround as my feeling is that it will not allow the optimizations of Drools to shine. Please recommend more effective and elegant way of implementing this. Thank you in advance -- View this message in context: http://drools.46999.n3.nabble.com/Typecasting-problem-tp3412494p3412494.html Sent from the Drools: User forum mailing list archive at Nabble.com.

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Setting category tags programmatically

by gab

Hi all, my application needs several hundreds rules to implement its business logic. We generated such rules from a legacy database using a few sql scripts, since the relevant tables contained the business configuration constraints for the app, and then added them to Guvnor by means of the eclipse plugin. Is it possible to set category tags programmatically for that rules artifacts in Guvnor? Possibly a script or some java api? Thanks in advance, Gab -- View this message in context: http://drools.46999.n3.nabble.com/Setting-category-tags-programmatically-... Sent from the Drools: User forum mailing list archive at Nabble.com.

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Re: [rules-users] Guvnor - Loading enums programatically using rule metadata

by GPatel＠tsys.com

I realize that "drools" is a runtime variable, available only during rule execution, but the question still stands. Is it possible to somehow pass in rule attributes as arguments to Data loaders for enums? Any help would be appreciated Thanks G. Patel From: Ghanshyam Patel/Tempe/TotalSystem To: rules-users(a)lists.jboss.org Date: 10/10/2011 03:35 PM Subject: Guvnor - Loading enums programatically using rule metadata The Guvnor manual specifies how to load enum data programtically but it seems like only other fields on the same Fact can be used to filter the values that can show up in the drop-down fields, as shown below: 'Fact.field[dependentField1, dependentField2]' : '(new com.yourco.DataHelper()).getListOfAges("@{dependentField1}", "@{dependentField2}")' Is it possible to somehow use other rule attributes, like package name or rule metadata to filter the list? Something like the following: 'Fact.field[dependentField1]' : '(new com.yourco.DataHelper()).getListOfAges("@{dependentField1}", drools.getRule().getMetaData().get("ID"))' Thanks G. Patel ----------------------------------------- The information contained in this communication (including any attachments hereto) is confidential and is intended solely for the personal and confidential use of the individual or entity to whom it is addressed. If the reader of this message is not the intended recipient or an agent responsible for delivering it to the intended recipient, you are hereby notified that you have received this communication in error and that any review, dissemination, copying, or unauthorized use of this information, or the taking of any action in reliance on the contents of this information is strictly prohibited. If you have received this communication in error, please notify us immediately by e-mail, and delete the original message. Thank you

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Map errors and quirks

by zstlaw

I have a large pool of errors I would like help with but I am breaking them up by topic since they are so different in nature. I have made fairly simple examples to start. Environment : Using drools 5.2.0.Final on Linux using the openjdk 6 JDK. First are some bugs in Map access when using a local variable or a object variable as key. This is a very simple case which gets more complicated in my next example in this email. The rule file will not compile despite appearing logically valid to me. /* simple example class */ package com.sample; import java.util.Date; import java.util.HashMap; import java.util.Map; public class Mailbox { static public final String TEST_EMAIL = "me(a)test.com"; public Map<String, Date> recentContacts = new HashMap<String, Date>(); public Mailbox() { owneremail = TEST_EMAIL; // create contact for self recentContacts.put(owneremail, new Date()); } public Map<String, Date> getRecentContacts() { return recentContacts; } } /* simple rule file */ // this rule is nonsensical but attempts hashmap access via many means to find out why // behavior was inconsistant. Each commented line will cause file to not compile when uncommented. // the uncommented lines are present to show what does work. package com.sample import java.util.Date; import java.util.Map; import com.sample.Mailbox; rule "check recentContacts hash mvel" dialect "mvel" when $m : Mailbox( // Each commented line will result in the file no longer compiling if uncommented $me : owneremail, recentContacts[Mailbox.TEST_EMAIL] != null, recentContacts["me(a)test.com"] != null, // recentContacts[owneremail] != null, // HAS ERROR because it checks HashMap for owneremail recentContacts[$me] != null, $d1 : recentContacts[Mailbox.TEST_EMAIL], $d2 : recentContacts["me(a)test.com"], // $d3 : recentContacts[$me], // HAS ERROR only when doing variable assignment recentContacts.get(owneremail) != null, recentContacts.get($me) != null, // $d4: recentContacts.get($me), // HAS ERROR only if doing variable assignment $d5 : getRecentContacts(), $d6 : getRecentContacts().size, 0 < 1 ) then System.out.println( "recentContacts were accessible" ); end Any suggestions? Not being able to access objects in a hash is problematic. And it gets worse if objects are not base java classes as I find even static enums getting handled erratically when used as keys. Some time I need to use the full name but using a method I can use different expression and have it work. Moving to next problem now this is my real problem. Please note that I was not initially usign an inner static enum but moved it there to make example a single file. /* more complicated version of class */ package com.sample; import java.util.ArrayList; import java.util.Date; import java.util.HashMap; import java.util.List; import java.util.Map; public class Mailbox { // taken straight form example code static public class Message { public static final int HELLO = 0; public static final int GOODBYE = 1; private String message; private int status; public String getMessage() { return this.message; } public void setMessage(String message) { this.message = message; } public int getStatus() { return this.status; } public void setStatus(int status) { this.status = status; } } static public enum FolderType {INBOX, SENT, TRASH}; static public final String TEST_EMAIL = "me(a)test.com"; private Map<FolderType, List<Message>> folders = new HashMap<FolderType, List<Message>>(); public Map<String, Date> recentContacts = new HashMap<String, Date>(); private String owneremail; public Mailbox(String username) { owneremail = username; // create contact for self recentContacts.put(owneremail, new Date()); // create default folders folders.put(FolderType.SENT, new ArrayList<Message>()); folders.put(FolderType.TRASH, new ArrayList<Message>()); folders.put(FolderType.INBOX, new ArrayList<Message>()); } /** parameterized accessor */ public List<Message> getFolder(FolderType t) { return folders.get(t); } public Map<FolderType, List<Message>> getFolders() { return folders; } public Map<String, Date> getRecentContacts() { return recentContacts; } public String getOwneremail() { return owneremail; } } /* more complicated rule */ package com.sample import java.util.Date; import java.util.HashMap; import java.util.List; import java.util.Map; import com.sample.Mailbox; import com.sample.Mailbox.FolderType; import com.sample.Mailbox.Message; rule "check folders hash mvel" dialect "mvel" when $m : Mailbox( // Each commented line will result in the file no longer compiling $type1 : FolderType.INBOX, $type2 : com.sample.Mailbox$FolderType.INBOX, $work1 : getFolder(null), $work2 : getFolder(com.sample.Mailbox$FolderType.INBOX), $work3 : getFolder(com.sample.Mailbox$FolderType.INBOX).size, // getFolder(FolderType.INBOX), // HAS ERROR - unable to resolve using strict mode getFolder($type1) != null, // $err1 : getFolder($type1), // again HAS ERROR only when doing variable assignment getFolder($type2) != null, // $err2 : getFolder($type2), // again HAS ERROR only when doing variable assignment getFolder($type1).size() > 0, getFolder($type1).isEmpty(), // $err3 : folders[FolderType.INBOX], // HAS ERROR // $err4 : folders[com.sample.Mailbox.FolderType.INBOX], // HAS ERROR - bad path syntax obviously // $err5 : folders[com.sample.Mailbox$FolderType.INBOX], // HAS ERROR // folders[$type1]!=null, // HAS ERROR // folders[$type2]!=null, // HAS ERROR $work6 : folders, $work7 : folders.size, folders.containsKey(com.sample.Mailbox$FolderType.INBOX), folders.containsKey($type2), !folders.isEmpty, // $err6: folders.size(), // HAS ERROR // $err7: folders.isEmpty(), // HAS ERROR // folders.get(FolderType.INBOX)!=null, // HAS ERROR // folders.get(com.sample.Mailbox.FolderType.INBOX)!=null, // HAS ERROR - bad path syntax obviously // folders.get(com.sample.Mailbox$FolderType.INBOX)!=null, // HAS ERROR // folders.get($type1)!=null, // HAS ERROR // folders.get($type2)!=null, // HAS ERROR $work8 : getFolders(), $work9 : getFolders().size, // getFolders().size(), // HAS ERROR 0 < 1 ) then System.out.println( "folders were accessible" ); end Now you can see my real problem. Dealing with a hash of enum to other object I get a lot of odd behavior on hash keying depending on how I make each call and while I really need to store the result to do many comparisons I can not unless I hardcode the parameter by which I am accessing the data which would profoundly weaken the rules I am writing. While I could register every object in the hash the problem then becomes the profusion of meta objects and the management of them especially given the memory leaks not fixed until 5.3.Final is released. Thank you for any assistance! -- View this message in context: http://drools.46999.n3.nabble.com/Map-errors-and-quirks-tp3404106p3404106... Sent from the Drools: User forum mailing list archive at Nabble.com.

14 years, 9 months

2
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Temporal operators fail on persisted SKS

by Melton, Michael P CTR SPAWARSYSCEN-ATLANTIC, 01200

Hello, I have a SKS that is persisted using JPAKnowledgeService. I am using events and have multiple rules that match on those events using the "after" and "before" temporal operators. When I have a fresh session, I can insert events and fire rules till the cows come home with no issue. However, if I load a persisted session containing event facts and try to insert a new event, when rule conditions attempt to evaluate on the *persisted* events in working memory, I get "org.drools.common.DefaultFactHandle cannot be cast to org.drools.common.EventFactHandle". I have googled extensively on this issue and, though it seems to be relatively common, none of the resolutions I've seen apply to me. I've doublechecked that my events are declared as such. I've debugged into Drools code and verified that the FactHandle returned upon insertion is an EventFactHandle. However, it seems as if the engine "forgets" that these facts are events when the session is persisted or rehydrated. I do not currently have a simple example to share, and I can work on one if required, but I wanted to get my question out ahead of that in case anyone in the community has an answer for me off the top of their head. Any assistance is appreciated. Mike

14 years, 9 months

1
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How to convert .drl file to XML ...

by Manohar Kokkula

Hi All! I'm trying to convert a .drl file to xml But im not sure how to approach for this, Please help me regarding the same. Here is my drl file: package com.rules import com.model.Bank; rule "Your First Rule" when $b1:Bank(name=="Manohar", accntno=="533") then $b1.setBalance(5000); $b1.setDeposit($b1.getBalance()+1000); end rule "Your Second Rule" when $b1:Bank(name=="Ajay", accntno=="536") then $b1.setBalance(6000); $b1.setDeposit($b1.getBalance()+2000); end Thanks and Regards Manohar Kokkula Mailto: manohar.kokkula(a)tcs.com =====-----=====-----===== 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, 9 months

3
2
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rules-users October 2011