How to forsee mid way planning team changes
by ns
Hi,
I am working on a planning tool based on the nurse rostering example. I have
encountered a problem which I do not know how to solve correctly.
Our employees are divided into teams. But sometimes employees switch between
teams, to for example cover the illness or pregnancy of a colleague. Each
team has its own shifts.
So for example Optaplanner may propose a roster for a month. In the middle
of the month the employee changes team. I know this when I start the
planning. But how do I tell Optaplanner that in the middle of the month the
employee changes team and hence has different shifts?
Thanks.
Kind regards,
Nick
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12 years, 4 months
Drools 5,3.1 with MVEL 2.1 Concurrency issue
by adarsh.chaini＠hsbcib.com
Hi ,
We have noted another incident in our testing environment where we
have noted that there is a concurrency issue with the drools and mvel
version we are using where the threads are blocked for a long time
resulting the application node/JVM reach an unexpected state which
needed to be restarted.Could some one look into this if there is a known
defect on this and if it has been resolved in a later version?.
Thread[DSLFpmlDataRecordKeepingTradeViewCacheWorker:5,5,DSLFpmlDataRecordKeepingTradeViewCache]
java.util.WeakHashMap.get(WeakHashMap.java:470)
org.mvel2.util.ParseTools.getBestCandidate(ParseTools.java:246)
org.mvel2.util.ParseTools.getBestCandidate(ParseTools.java:224)
org.mvel2.compiler.PropertyVerifier.getMethod(PropertyVerifier.java:509)
org.mvel2.compiler.PropertyVerifier.analyze(PropertyVerifier.java:120)
org.mvel2.compiler.ExpressionCompiler.verify(ExpressionCompiler.java:381)
org.mvel2.compiler.ExpressionCompiler._compile(ExpressionCompiler.java:273)
org.mvel2.compiler.ExpressionCompiler.compile(ExpressionCompiler.java:62)
org.mvel2.MVEL.compileExpression(MVEL.java:810)
org.drools.base.mvel.MVELCompilationUnit.compile(MVELCompilationUnit.java:426)
org.drools.base.mvel.MVELCompilationUnit.getCompiledExpression(MVELCompilationUnit.java:243)
org.drools.base.dataproviders.MVELDataProvider.compile(MVELDataProvider.java:83)
org.drools.rule.MVELDialectRuntimeData.onBeforeExecute(MVELDialectRuntimeData.java:162)
org.drools.rule.DialectRuntimeRegistry.onBeforeExecute(DialectRuntimeRegistry.java:138)
org.drools.common.AbstractRuleBase.readExternal(AbstractRuleBase.java:295)
org.drools.reteoo.ReteooRuleBase.readExternal(ReteooRuleBase.java:223)
org.drools.impl.KnowledgeBaseImpl.readExternal(KnowledgeBaseImpl.java:116)
java.io.ObjectInputStream.readExternalData(ObjectInputStream.java:1835)
java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1794)
java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1348)
java.io.ObjectInputStream.readObject(ObjectInputStream.java:370)
Thread[DSLFpmlDataRecordKeepingCacheWorker:39,5,DSLFpmlDataRecordKeepingCache]
java.util.WeakHashMap.expungeStaleEntries(WeakHashMap.java:386)
java.util.WeakHashMap.getTable(WeakHashMap.java:417)
java.util.WeakHashMap.get(WeakHashMap.java:464)
org.mvel2.util.ParseTools.getBestCandidate(ParseTools.java:246)
org.mvel2.util.ParseTools.getBestCandidate(ParseTools.java:224)
org.mvel2.compiler.PropertyVerifier.getMethod(PropertyVerifier.java:509)
org.mvel2.compiler.PropertyVerifier.analyze(PropertyVerifier.java:120)
org.mvel2.compiler.ExpressionCompiler.verify(ExpressionCompiler.java:381)
org.mvel2.compiler.ExpressionCompiler._compile(ExpressionCompiler.java:273)
org.mvel2.compiler.ExpressionCompiler.compile(ExpressionCompiler.java:62)
org.mvel2.MVEL.compileExpression(MVEL.java:810)
org.drools.base.mvel.MVELCompilationUnit.compile(MVELCompilationUnit.java:426)
org.drools.base.mvel.MVELCompilationUnit.getCompiledExpression(MVELCompilationUnit.java:243)
org.drools.base.mvel.MVELPredicateExpression.compile(MVELPredicateExpression.java:69)
org.drools.rule.MVELDialectRuntimeData.onBeforeExecute(MVELDialectRuntimeData.java:162)
org.drools.rule.DialectRuntimeRegistry.onBeforeExecute(DialectRuntimeRegistry.java:138)
org.drools.common.AbstractRuleBase.readExternal(AbstractRuleBase.java:295)
org.drools.reteoo.ReteooRuleBase.readExternal(ReteooRuleBase.java:223)
org.drools.impl.KnowledgeBaseImpl.readExternal(KnowledgeBaseImpl.java:116)
java.io.ObjectInputStream.readExternalData(ObjectInputStream.java:1835)
java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1794)
java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1348)
java.io.ObjectInputStream.readObject(ObjectInputStream.java:370)
We have found a similar BUG in the drools defect database
https://issues.jboss.org/i#browse/DROOLS-81 but the scenarios are bit
different.
In our case it has happened when we deserialize the serilized
KnowledgeBaseImpl by multiple threads and it seems that the problem is
due to usage of a java.util.WeakHashMap as a class variable in
org.mvel2.util.ParseTools.getBestCandidate(ParseTools.java:246)
Thanks
&
Regards,
Adarsh
SENIOR LEAD DEVELOPMENT SPECIALIST
SCJP, SCWCD
FINANCE TECHNOLOGY
HSBC BANK PLC HBEU
8 Canada Square,Canary Wharf,
London,E14 5HQ,United Kingdom
------------------------------------------------------
Phone +44 207914720
Mobile 07595530105
Email. adarsh.chaini(a)hsbcib.com
________________________________
From:
Imran Shafiq <ishafiq(a)redhat.com>
To:
Adarsh CHAINI/IBEU/HSBC@HSBC
Date:
17/09/2013 18:55
Subject:
Drools Community Issue.
Hi Ardash,
I've seen details of the recent issue you have experienced with the
community Drools product; I was keen to contact you regarding this.
We have been a strategic and global supplier to HSBC for many years, and
have built our success largely on our ability to provide full enterprise
services and productised versions of community products, that are fit for
enterprise use.
In the case of community Drools, our productised version (JBoss BRMS)
provides a full testing, certification, commercial assurance eco-system,
and 24*7 SLA support service - which would appear to be ideally positioned
to help address issues such as that which you are currently experiencing.
Ardash, given the appetite of HSBC to mitigate the risk associated with
the use of community software alone, I would welcome the opportunity to
have a brief initial conversation with you concerning the above.
Might there be a suitable number for me to reach you in the coming days?
Kind regards
Imran
Imran Shafiq
Strategic & Global Accounts Team
Red Hat UK
Direct: +44 (0) 1252 362766
Mobile: +44 (0) 7506 765 287
ishafiq(a)redhat.com
www.europe.redhat.com
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already provides other services. It may equally decide to allocate to its
own proprietary book or with an associate of HSBC Group. This represents a
potential conflict of interest. HSBC Bank plc has internal arrangements
designed to ensure that the firm would give unbiased and full advice to
the corporate finance client about the valuation and pricing of the
offering as well as internal systems, controls and procedures to identify
and manage conflicts of interest.
HSBC Bank plc
Registered Office: 8 Canada Square, London E14 5HQ, United Kingdom
Registered in England - Number 14259
Authorised by the Prudential Regulation Authority and regulated by the
Financial Conduct Authority and the Prudential Regulation Authority
************************************************************
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"HSBC" for the information of the addressee only and should not be
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is neither an offer nor the solicitation of an offer to sell or
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completeness or accuracy.
12 years, 4 months
lock-on-active
by Stephen Masters
Hi folks,
According to the user guide, lock-on-active “inhibits additional activations of all rules with this flag set within the same rule flow or agenda group”.
I was doing a little testing of some rules earlier today, and noticed that lock-on-active seems to change behaviour when applied to rules which don’t have an agenda-group or rules flow-group defined. It also seemed to have a slightly inconsistent effect, although that may just be me not realising what it’s supposed to do.
There doesn’t appear to be any documentation of what the attribute means when a rule is not part of a rule flow or agenda group. So I was wondering whether perhaps there is an expected/official behaviour, which is just not documented. Or is lock-on-active without a rule flow or agenda group an error? In which case is there a reason why it doesn’t cause a compilation error when the knowledge base is built?
Yours curiously...
Steve
12 years, 4 months
Optaplanner JAXB
by Jugu Dannie
The optaplanner uses XStream for reading the solver configuration from XML.
For using JAXB instead, is it sufficient to have custom implementation of
XMLSolverFactory and SolverConfig?
12 years, 4 months
Formula in Decision Table?
by nzhu972
Can someone confirm if I am using Formula the correct way in a web based
decision table?
I like to populate the Condition Columns automatically when certain other
columns in the Condition Columns are populated.
For example, If col1 and col2 are populated, can I use formula to auto
populate col4 with value X and if col1, col2 and col3 are populated, then
auto populate col4 with Y?
If Formula isn't the right approach, is auto populating possible for web
based decision table in Drools 5?
Thanks
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12 years, 4 months
bound variable scope
by webfrank
Hi,
I have a rule with a "from accumulate" where I bind "e" variable to Event
object. I would like to pass "e" to
send method of channel like: channels["reset"].send(e); but I got a Rule
Compilation error with: "e cannot be resolved". Why I cannot access variable
"e" when defined inside from accumulate?
rule "Reset alarm"
when
a : Alarm()
c : Number( intValue > 5) from accumulate (
e : Event( level < 6) over window:time(10s) from entry-point "queue",
count(e)
)
then
channels["reset"].send("Alarm resolved.");
end
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12 years, 5 months
