Why is solving a partial puzzle much slower than generating one from scratch?
by aitchnyu
I am making a 3x3 Sudoku solver with Drools planner. The planning entities
are the digits. The problem facts are the rows (planning variable) and
columns.
When I set Drools Planner to solve a problem where no digit is initialized,
it gives a perfect solution in ~15 secs. But when I set a few digits as
initialized, it never finds a solution. It always lists 8 hard constraints
broken on termination.
I implemented the moves as:
if(digit.getFixed()==false){
moveList.add(new RowChangeMove(digit, toRow));
}
If the digit is fixed, dont make a move object for it.
Earlier, I implemented it in isMoveDoable: if the digit.getFixed() is true,
it returns false. Both do not work.
20:31:13.442 [main] INFO o.d.p.c.l.DefaultLocalSearchSolverPhase - Phase
local search finished: step total (978), time spend (60061), best score
(-8).
20:31:13.442 [main] INFO o.d.p.core.solver.DefaultSolver - Solved: time
spend (60061), best score (-8), average calculate count per second (7433).
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13 years, 11 months
Guvnor data enumeration issue
by GPatel＠tsys.com
I am trying to use data enumerations and running into a problem. Following
the Vehicle engineType/fuelType data enumeration example in the Guvnor
manual, I created the following enumeration list and it works:
'Vehicle.engineType' : (new test.VehicleHelper()).getEngineTypes()
'Vehicle.fuelType[engineType]' : '(new
test.VehicleHelper()).getFuelTypes("@{engineType}")'
VehicleHelper:
------------
public class VehicleHelper {
public List<String> getEngineTypes(){
List<String> engineTypes = new ArrayList<String>();
engineTypes.add("Petrol");
engineTypes.add("Diesel");
return engineTypes;
}
public List<String> getFuelTypes(String engineType){
List<String> fuelTypes = new ArrayList<String>();
if("Petrol".equalsIgnoreCase(engineType)){
fuelTypes.add("ULP");
fuelTypes.add("PULP");
}
else if("Diesel".equalsIgnoreCase(engineType)){
fuelTypes.add("BIO");
fuelTypes.add("NORMAL");
}
else{
fuelTypes.add("Default Fuel 1");
fuelTypes.add("Default Fuel 2");
}
return fuelTypes;
}
}
Above works as expected.
Problem:
I want to only have an enumeration on Vehicle.fuelType that depends on the
value of engineType, without specifying an enumeration on engineType. So,
I took out the first line in my enumeration list so that it is now:
'Vehicle.fuelType[engineType]' : '(new
test.VehicleHelper()).getFuelTypes("@{engineType}")'
But that does not work. When I create a rule, VehicleHelper.getFuelTypes
does not get called and the dropdown for fuelType is not a list.
How do I get this working?
Thanks
G. Patel
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13 years, 11 months
Bug with BatchExecutionHelper when using Log4j rootlogger?
by dunnlow
Hi,
I have a small drools client that sends a pojo to a Drools Server using
xstream:
MyBean mb = new MyBean();
List<Command> cmds = new ArrayList<Command>();
InsertObjectCommand insertCmd = (InsertObjectCommand)
CommandFactory.newInsert(mb);
insertCmd.setOutIdentifier("inserter");
insertCmd.setEntryPoint("Default");
cmds.add(insertCmd);
FireAllRulesCommand fireAllRulesCommand = new FireAllRulesCommand();
cmds.add(fireAllRulesCommand);
BatchExecutionCommand command =
CommandFactory.newBatchExecution(cmds,"ksession1");
String xml BatchExecutionHelper.newXstreammarshaller().toXML(command); *<--
this XML is sent to the server*
..........8<
Pretty standard, I think. It works just fine and I get a http 200 response
back from my server.
HOWEVER, if I add log4j (log4j.1.2.14.jar) and a log4j.properties that has a
root logger (set to any level) the XML produced includes an "appenderList"
which seems to be trying to stream the log4j appenders (e.g.
org.apache.log4j.ConsoleAppender). I'm guessing these are not serializable
(no surprise there) and the server complains about the XML. (fyi, the same
log4j jar is on the drools server)
Is this a known issue/expected? I can comment out the root logger and
everything is back to ok.
Thanks for any insight,
-J
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14 years, 1 month
Re: [rules-users] Error running Drools 5.0 HelloWorldExample on WebSphere 6.1
by Blythe, Marshall
A quick follow-up: this error occurs only when I have rules using the MVEL dialect. I rewrote the MVEL rule in the HelloWorld.drl to use the Java dialect, and now the problem is gone. I may need to raise this issue on the MVEL mailing list instead.
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14 years, 2 months
setting different value in consequence ( RHS part) based on a conditional check
by vadlam
Hi,
we have an existing BRL rule in Guvnor whereby we set the value of some
fields in RHS based on some value checks in the condition part. we have
created several of these rules already in a previous release.
In the next release, we have new requirements to set the value of an
existing field in consequence to be of 2 different values based on a
specific conditional evaluation. the rest of the rule remains the same.
to clarify,
when
samplefact1( status== "active" , state=="CA" )
then
Response fact0= new Response();
fact0.setField1( "Y" );
fact0.setName( "something " );
insert(fact0 );
end
we now have to change this to set Field1 value to Y or N based on some
updated condition for status field.
lets say if status=="active" , Field1 has to be Y, but when status=closed,
then Field1 has to be N
Please keep in mind that the rest of the rule remains the same.
is there a way to set the value of Field1 to be Y or N within the
consequence part of same rule without having to create another rule .
will the use of functions or variables be of any help in this case?
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14 years, 2 months
Camel-drools example
by Serge Vilvovsky
Can anybody provide, please, the example of using camel with drools? Where
should I place the drool files if I run them in ServiceMix?
Thank you!
14 years, 2 months
Accumulate function, events and stream processing
by Juanker Atina
I need your help to put to work an accumulate function.
So, i will introduce several facts into working memory (StateEvent, which i
declare as event) and i want to accumulate the last five values.
I have changed a property in drools.default.rulebase.conf
(drools.eventProcessingMode = STREAM) to make the engine works in stream
mode.
And my rule is:
declare StateEvent
@role( event )
end
rule "Testing"
when
$total : Number() from accumulate(
StateEvent(itemName=="Temperatura", $val : newState) over
window:length( 5 ),
sum ( ((DecimalType)$val).toBigDecimal().doubleValue() ) )
then
#actions
end
But it's not working, as the value of $total is 0.0, no matter what i do,
and the rule is firing with every fact in the working memory.
Any help will be appreciated.
Thanks
14 years, 2 months
ruleflow and bpmn files issues with drools and guvnor 5.2 final
by style.x7
Hi all,
I've tried drools 5.2 final version with much excitement but the default
create new drools project is already giving problems:
Issue 1. Exceptions when running default created .rf and .bpmn files.
When I ran ProcessTest.java with .rf file, I get:
java.lang.NullPointerException
at
org.drools.compiler.PackageBuilder.addProcessFromXml(PackageBuilder.java:516)
at
org.drools.compiler.PackageBuilder.addKnowledgeResource(PackageBuilder.java:556)
at
org.drools.builder.impl.KnowledgeBuilderImpl.add(KnowledgeBuilderImpl.java:28)
at com.sample.ProcessTest.readKnowledgeBase(ProcessTest.java:36)
at com.sample.ProcessTest.main(ProcessTest.java:23)
When I ran ProcessTest.java with .bpmn file, I get:
lang.IllegalArgumentException: Unable to instantiate service for Class
'org.drools.compiler.BPMN2ProcessProvider'
at org.drools.util.ServiceRegistryImpl.get(ServiceRegistryImpl.java:161)
at
org.drools.compiler.BPMN2ProcessFactory.loadProvider(BPMN2ProcessFactory.java:29)
at
org.drools.compiler.BPMN2ProcessFactory.getBPMN2ProcessProvider(BPMN2ProcessFactory.java:21)
at
org.drools.compiler.BPMN2ProcessFactory.configurePackageBuilder(BPMN2ProcessFactory.java:12)
at
org.drools.compiler.PackageBuilder.addKnowledgeResource(PackageBuilder.java:559)
at
org.drools.builder.impl.KnowledgeBuilderImpl.add(KnowledgeBuilderImpl.java:28)
at com.sample.ProcessTest.readKnowledgeBase(ProcessTest.java:33)
at com.sample.ProcessTest.main(ProcessTest.java:20)
Caused by: java.lang.IllegalArgumentException: Unable to instantiate
'org.jbpm.bpmn2.BPMN2ProcessProviderImpl'
at
org.drools.util.ServiceRegistryImpl$ReflectionInstantiator.newInstance(ServiceRegistryImpl.java:210)
at
org.drools.util.ServiceRegistryImpl$ReflectionInstantiator.call(ServiceRegistryImpl.java:202)
at org.drools.util.ServiceRegistryImpl.get(ServiceRegistryImpl.java:159)
... 7 more
Caused by: java.lang.ClassNotFoundException:
org.jbpm.bpmn2.BPMN2ProcessProviderImpl
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Unknown Source)
at
org.drools.util.ServiceRegistryImpl$ReflectionInstantiator.newInstance(ServiceRegistryImpl.java:207)
... 9 more
Issue 2: Guvnor 5.2 final unable to display .rf and .bpmn files
No error message was given when guvnor is unable to display .rf files. The
popup shows blank diagrams.
For .bpmn files, guvnor with designer-1.0.0.052-jboss.war shows the oryx
editor with blank diagrams, error message:
SEVERE [JbpmProfileImpl] Could not find BPMNDI information
java.lang.IllegalArgumentException: Could not find BPMNDI information
at
com.intalio.bpmn2.impl.Bpmn2JsonMarshaller.marshallProcess(Bpmn2JsonMarshaller.java:347)
at
com.intalio.bpmn2.impl.Bpmn2JsonMarshaller.marshallDefinitions(Bpmn2JsonMarshaller.java:255)
at
com.intalio.bpmn2.impl.Bpmn2JsonMarshaller.marshall(Bpmn2JsonMarshaller.java:138)
at
com.intalio.web.profile.impl.JbpmProfileImpl$2.parseModel(JbpmProfileImpl.java:197)
at
com.intalio.web.repository.impl.UUIDBasedJbpmRepository.load(UUIDBasedJbpmRepository.java:38)
at
com.intalio.web.server.UUIDBasedRepositoryServlet.doGet(UUIDBasedRepositoryServlet.java:123)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:617)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at
com.intalio.web.filter.impl.PluggableFilter.doFilter(PluggableFilter.java:75)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at
org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:235)
at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at
org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:190)
at
org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:92)
at
org.jboss.web.tomcat.security.SecurityContextEstablishmentValve.process(SecurityContextEstablishmentValve.java:126)
at
org.jboss.web.tomcat.security.SecurityContextEstablishmentValve.invoke(SecurityContextEstablishmentValve.java:70)
at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at
org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:158)
at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:330)
at
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:829)
at
org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:598)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
at java.lang.Thread.run(Unknown Source)
My development environment is eclipse 3.6, drools plugin 5.2 final, java 6,
windows 7, jboss as 5.1 jdk 6.
Any help would be greatly appreciated.
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14 years, 2 months
