[rules-users] Import Error
Hi All, I have class I could import that class in my java file but when I ma trying to import that in drl file, I am getting error saying ImportError Any one has any idea; Thanks Sougata This message contains information that may be privileged or confidential and is the property of the Capgemini Group. It is intended only for the person to whom it is addressed. If you are not the intended recipient, you are not authorized to read, print, retain, copy, disseminate, distribute, or use this message or any part thereof. If you receive this message in error, please notify the sender immediately and delete all copies of this message. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] Attribute activations vs object activations
Mark, Thank you for the quick response.I understand what you are saying in terms of efficiency, the problem we have though is that the rule engine is only one of many client applications to our system, and in terms of injecting data into our system it is actually a very minor client at that. It is really the other clients that are doing the majority (95%) of the creating, modifying, and deleting. The rule engine we have set up is more of a cautionary client that creates Alert objects to notify the users, using other clients to our system, that something is wrong. IE don't put a fox in the same room as a chicken without a person, those types of things (but obviously more complex than this). As such, and since we are adhering to the java bean event model, all modifications that come to our Drools client are in the form of single value property change events. That is why I was using the dynamic ones. Figured it was the same as me calling update after every single update anyway. What I could do though is set up a queue on my Drools engine client that will store the external incoming property change events and batch process them say every 2-5 seconds. I can see what you are saying though for batch commands, especially if the right hand side of the rule is creating/modifying tons of objects (internal drools events).In that case it would be most beneficial to do batch processing because you are in control of the events. Also thank you for the heads up on the slot-specific rule activations functionality.I think this will definitely be a nice addition to the Drools engine and I look forward to it's release! Thanks again! Joshua Mark Proctor wrote: firstly I wouldn't recommend you use the dynamic update stuff its not very efficient. its no less efficient than jess, but the principle itslef is bad. The reason is because each field change results in a notification to the engine, where as you really want to notify the engine after a batch of changes to the instance. The feature I believe you are after is called slot-specific, so that only fields which are constrained on pick up the notifications if those fields have changed. This is not currently supported - sorry. Will probably be in our next major release in Q1. Mark Joshua Undesser wrote: I am sorry if this has already been answered, I tried a few different search combinations within this user forum and didn't find an answer. I am pretty new to Drools, but am no stranger to JESS and CLIPS. We are currently looking at moving over our product implementations from JESS to DROOLS. In looking at what it will take to do the conversion, and working with a few sample systems, i've noticed that DROOLS doesn't seem to support attribute activations, only object activations.What I mean by this is say that I have two rules. rule Rule 1 when $o : ObjectType (type == OBJECTTYPE.STATIC ) then System.out.println(ObjectType is Static); end rule Rule 2 when $o : ObjectType (active == false) then System.out.println(ObjectType not active); end (My sample system is utilizing the default Drools 4.0 shadow fact support so as an ObjectType object is created I am calling memory.insert(obj, true) for dynamic updates.) If on external property change event occurs on an ObjectType:active attribute, both rules fire. Which to me signifies that if any attribute on the ObjectType object happens, all rules that contain ObjectType on the LHS of the rule will be re-evaluated (not re-fired, but re-evaluated). Now I realize these rules are simple and that I could code the rules in a way to avoid them being fired, but non the less, they would still need to be evaluated to the point where the engine realizes it should run. Instead, performance-wise, wouldn't it be more beneficial to only re-evaluate the rules that contain the attribute that changed that you are interested in? I.E. In the above scenario, only RULE 2 would fire because rule 1 doesn't contain the attribute that changed. The early versions of JESS did not support attribute activations (aka per slot activations), which was a major stumbling block. However ever since JESS 5.0, if I remember right, they've been included. So I guess my question is, does DROOLS support attribute activations and I am just blind?If Drools does not support this, is it scheduled to be supported in the future? Thank you in advance! Joshua ___ 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:
[rules-users] Jboss rules: or with binding issue?
I am using Jboss Rules 4.0.2 version. I am trying to using or with binding. However the following doesn't work rule RulesTest # the if part activation-group ActivationGroup1 salience 50 when $eventType: EventType(id == Constants.EVENT_DEVCOM_ID) $result : Result() $param : Parameter($thresh:threshold) # difference exceeds threshold value and it is still day time context: (or DevContext(difference $thresh, dayTime == true) DevContext(difference $thresh, sleepy == false, dayTime == false) ) then # do something here end I get rule compilation errors: SEVERE: CheckedDroolsException org.drools.CheckedDroolsException: There were errors in the rule source: [320,18]: unknown:320:18 mismatched token: [EMAIL PROTECTED],12142:12143='or',34,320:18]; expecting type ID[321,15]: unknown:321:15 mismatched token: [EMAIL PROTECTED],12215:12227='DevContext',7,321:15]; expecting type RIGHT_PAREN[321,86]: unknown:321:86 mismatched token: [EMAIL PROTECTED],12286:12286=')',12,321:86]; expecting type THEN at org.drools.compiler.RuleBaseLoader.makeRuleBase(RuleBaseLoader.java:6 Is this a known bug ? I can work around by using the alternate syntax suggested in the documentation which is: or $context : DevContext(difference $thresh, dayTime == true) $context : DevComContext(difference $thresh, sleepy == false, dayTime == false) ) Rahul. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
[rules-users] DSL regex support
I just upgraded to 4.0.3 and want to take advantage of regex support for
my DSL. Specifically, I want to be able to use a character class at the
start of my expander expression to allow the first character to be case
insensitive. For example (in the expander definition):
[when][Ff]act value is {value}= SomeFact( value == {value})
So that the rule could be written as Fact value is... or fact value
is. But I think this conflicts with a syntax that the parser uses
to add constraints to the previous declaration (according to the
reference docs, section 6.7.4). If I try to use the same character class
construct anywhere other than the first character it works fine.
Is there some escape sequence I can use to get what I'm looking for?
Simply escaping the [ and ] with \ didn't work.
Thanks,
Adam Lewandowski
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Re: [rules-users] infinite loop controlling
for individual rules you'd have to manage it yourself. there is a
generic firelimit which can be applied, but it tracks all rules.
Paul Browne wrote:
Mark,
I'm interested in this (for another mad reason).
I'm guessing that you're refering to AgendaEventListener; Are you
suggesting using an implementation of this listener that has a counter
to check if a rule is fired too many times , then calls
workingmemory.halt() if required?
Or is there a better way of doing this?
Thanks
Paul
Mark Proctor wrote:
There is no out of the box way to do this, you could add an event
listener and check yourself for recursion and halt the session if it
is spotted.
Mark
Isabelle Hupont wrote:
Hi!
I'm developing a software where the user creates his own rules,
saves then,
and finally fires them in order to preprocess a set of data.
I have implemented a method for controlling infinite loops (its
simply a
timer). I would like to notify to the user the rule that has caused the
infinite loop, in order to change it. My code is the following:
public void fireRules(Instances instances) {
try {
assertInstances(instances);
// Worker thread to execute task that may hang.
WorkerThread workerThread = new WorkerThread();
// Wait for timeout or task end.
synchronized (this) {
workerThread.start();
try {
this.wait(6);
} catch (InterruptedException e) {
log.error(e.getLocalizedMessage(),e);
}
if (!workerThread.isWorkDone()) {
// If work is not done then
workingMemory.fireAllRules()
// hasn't finished (the timeout has expired).
workingMemory.halt();
// Here comes the code for
capturing
rule that has code the loop
throw new PersistenceException(Operation
timeout. Please modify rule
XXX);
}
}
cleanWorkingMemory();
} catch (PersistenceException e) {
log.error(e.getLocalizedMessage(),e);
}
log.debug(Rule firing finished);
}
private class WorkerThread extends Thread {
private boolean workDone = false;
public boolean isWorkDone() {
synchronized (SingletonInferenceEngine.this) {
return workDone;
}
}
public void run() {
workingMemory.fireAllRules();
synchronized (SingletonInferenceEngine.this) {
workDone = true;
SingletonInferenceEngine.this.notifyAll();
}
}
}
Can you help me?
Thanks in advance!
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[rules-users] Drools 4.0.3 Released
http://blog.athico.com/2007/10/drools-403-released.html We just released Drools v4.0.3 http://labs.jboss.com/drools/downloads.html. This is a minor release with a few improvements on existing features and some bug fixes. Release Notes - JBoss Drools - Version 4.0.3 We would like to really thanks all the contributors that helped on getting this release out. From those contributing patches and docs, to those testing and reporting bugs and providing feedback. The list is a bit long to post all names here and I may incur in a mistake forgetting someone, so our open public thank you to you all! Follows the release notes. Happy Drooling Drools Team Bug - [JBRULES-1264 http://jira.jboss.com/jira/browse/JBRULES-1264] - NPE at BaseObjectClassFieldExtractor.getLongValue with null fields - [JBRULES-1266 http://jira.jboss.com/jira/browse/JBRULES-1266] - Composite facts types (OR, AND) not rendering correctly - [JBRULES-1272 http://jira.jboss.com/jira/browse/JBRULES-1272] - DSL : String index out of range: -1 - [JBRULES-1279 http://jira.jboss.com/jira/browse/JBRULES-1279] - Memory leak in release 4.0.2 - [JBRULES-1281 http://jira.jboss.com/jira/browse/JBRULES-1281] - ExecutorService cannot be shared - [JBRULES-1282 http://jira.jboss.com/jira/browse/JBRULES-1282] - Problems uploading models etc. into the BRMS - [JBRULES-1283 http://jira.jboss.com/jira/browse/JBRULES-1283] - Unable to serialize rule base ( NotSerializableException: org.drools.base.FireAllRulesRuleBaseUpdateListener) - [JBRULES-1295 http://jira.jboss.com/jira/browse/JBRULES-1295] - DSL Mapping files does not support comments and empty lines Feature Request - [JBRULES-1252 http://jira.jboss.com/jira/browse/JBRULES-1252] - DrlDumper does not dump import functions Task - [JBRULES-1260 http://jira.jboss.com/jira/browse/JBRULES-1260] - Include eclipse JDT library in drools-eclipse IDE plugin - [JBRULES-1293 http://jira.jboss.com/jira/browse/JBRULES-1293] - Backport for Eclipse 3.3 - [JBRULES-1294 http://jira.jboss.com/jira/browse/JBRULES-1294] - Upgrade to MVEL 1.2.10 -- Fernando Meyer http://fmeyer.org JBoss Rules Core Developer [EMAIL PROTECTED] ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
[rules-users] Rules firing with an update of another object
Hi everybody! Here is my code and my rule. The problem is that the rule doesn?t detect that my item ?chocolate? contained in the container has moved to the ?office?. I know that if I update the item instead the container it?s working, but I was wondering if there is a solution to detect this movement by this way? Do you have a solution? Thanks! ***CODE *** session = ruleBase.newStatefulSession(); Location kitchen=new Location(kitchen); Location office=new Location(office); Container container1=new Container(container1,kitchen); session.insert(container1); Item chocolate=new Item(chocolate, container1); session.insert(chocolate); session.fireAllRules(); //No rules fired = OK container1.setLocation(office); session.update(session.getFactHandle(container1), container1); session.fireAllRules(); //Once again, no rules fired = Not OK... I want detect this movement ***RULE *** rule An item is in the office salience 0 when $itemA : Item($cont : container, $cont.location.name==office) then System.out.println(item in office); end ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] Rules firing with an update of another object
Hi Fabrice, That is how it is supposed to work... no automatic way of doing it in another way. []s Edson 2007/10/23, Fabrice Granzotto [EMAIL PROTECTED]: Hi everybody! Here is my code and my rule. The problem is that the rule doesn?t detect that my item ?chocolate? contained in the container has moved to the ?office?. I know that if I update the item instead the container it?s working, but I was wondering if there is a solution to detect this movement by this way? Do you have a solution? Thanks! ***CODE *** session = ruleBase.newStatefulSession(); Location kitchen=new Location(kitchen); Location office=new Location(office); Container container1=new Container(container1,kitchen); session.insert(container1); Item chocolate=new Item(chocolate, container1); session.insert(chocolate); session.fireAllRules(); //No rules fired = OK container1.setLocation(office); session.update(session.getFactHandle(container1), container1); session.fireAllRules(); //Once again, no rules fired = Not OK... I want detect this movement ***RULE *** rule An item is in the office salience 0 when $itemA : Item($cont : container, $cont.location.name==office) then System.out.println(item in office); end ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users -- Edson Tirelli Software Engineer - JBoss Rules Core Developer Office: +55 11 3529-6000 Mobile: +55 11 9287-5646 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
