System problems
by paco
I am using Drools 5.4.0, guvnor 5.3.0 and default database.
I imported the rules with XML file (550 KB) in Guvnor. After I can check,
validate and test (with run analysis button) the rules without problems.
Everything works fine.
After when I import ed other rules XML file (30,000 KB), I realized that the
system becomes too slow and obviously I can no longer veifier, validate or
test my rules.
Please suggest
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13 years, 7 months
Continuous Planning values for task planning
by Josef Bajada
Hi,
I am new to Drools and Drools Planner, so apologies if I am asking anything
obvious.
My objective is to implement a simple (for now) planner which schedules
tasks according to 2 main criteria:
- Their duration (in seconds)
- Their dependencies on other tasks (e.g. Hard Constraint that Task B has
to start between 180 and 200 seconds after Task A finishes).
Since there are gaps between dependent tasks as part of the hard
constraints other tasks can be fitted in between dependent tasks.
So the Solver needs to find the optimal start time for each task that
satisfies the hard constraints, and in the shortest total timeline possible
to complete all tasks (soft constraint).
The main problem I am finding is that this start time, which is essentially
the planning variable is a continuous variable.
Chapter 4 of the Drools documentation mentions very briefly (Section
4.3.4.1) that planning variables can be continuous, but there does not
seem to be any more details about how to achieve this.
Even if the planning variable was discrete (say bins of 5 second
intervals), there is no upper bound as such.
How is it best to handle such planning variables in Drools Planner?
thanks,
josef
13 years, 7 months
Drools Guvnor 5.2 Issue on Websphere AS 7
by Ravikiran
Hi Drools gurus,
I am back again. As most of you know that i had many 'weld' related issues
for deploying Drools Guvnor 5.4 in Webspere 7. After all my trails, i have
decided to go for Guvnor 5.2 (which doesn't have weld+seam dependancies)
deployment on Websphere As7.
This time, I was able to deploy Guvnor 5.2.0 Final on Websphere AS7
successfully without any errors. I have changed the repository to my own
file path. When i launch the guvnor for the first it had asked me to load
the sample packages, i have chosen YES. It was succeffully loaded all sample
packages into my given file path. That's it, after the loading, my browser
window was completely blank except "Drools" logo on top left and
guest[signout] on top right.
Any Idea what was wrong with my setup. What should i do to get the guvnor
web...Please help.
http://localhost:9080/drools-guvnor/org.drools.guvnor.Guvnor/Guvnor.html
I saw view source,
----
----
<link rel="stylesheet" href="css/Guvnor.css">
<link rel="stylesheet" href="css/Guvnor_DecoratedPopupPanel.css">
<link rel="stylesheet" href="css/ruleflow.css">
</head>
<body>
<iframe id="__gwt_historyFrame" style="width: 0; height: 0; border:
0"></iframe>
<div id="loading">
<div class="loading-indicator">
images/loading-icon.gif
Please wait<br />
Loading application...
</div>
</div>
</body>
</html>
-----------------------------------------------------------------------------------------------
Is it something to do with 'org.drools.guvnor.Guvnor.nocache.js'?
thanks a lot in advance.
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13 years, 7 months
NPE loading Drools 5.4.0.Beta1 using drools-spring
by lhorton
I am trying to load up 5.4.0.Beta1. I'm using Spring configuration xml that
works fine in 5.2.0.Final. In the xml, my grid-node is defined as:
<drools:grid-node id="droolsClusterNode1"/>
The exception is a NPE on a method in WhitePagesClient. Any idea what the
cause might be? Has anyone successfully loaded 5.4.0 using Spring?
The full exception is:
ERROR 2012-01-06 15:51:05,998
[org.springframework.web.context.ContextLoader] - Context initialization
failed
org.springframework.beans.factory.BeanCreationException: Error creating bean
with name 'droolsClusterNode1': Invocation of init method failed; nested
exception is java.lang.NullPointerException
at
org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1420)
at
org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:519)
at
org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:456)
at
org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:291)
at
org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222)
at
org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:288)
at
org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:190)
at
org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:563)
at
org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:895)
at
org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:425)
at
org.springframework.web.context.ContextLoader.createWebApplicationContext(ContextLoader.java:276)
at
org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:197)
at
org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:47)
at
org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4206)
at
org.apache.catalina.core.StandardContext.start(StandardContext.java:4705)
at
org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:799)
at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:779)
at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:601)
at org.apache.catalina.startup.HostConfig.deployWAR(HostConfig.java:943)
at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:563)
at org.apache.catalina.startup.HostConfig.check(HostConfig.java:1399)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at
org.apache.tomcat.util.modeler.BaseModelMBean.invoke(BaseModelMBean.java:297)
at
com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.invoke(DefaultMBeanServerInterceptor.java:836)
at com.sun.jmx.mbeanserver.JmxMBeanServer.invoke(JmxMBeanServer.java:761)
at
org.apache.catalina.manager.ManagerServlet.check(ManagerServlet.java:1500)
at
org.apache.catalina.manager.HTMLManagerServlet.doPost(HTMLManagerServlet.java:252)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
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
org.apache.catalina.filters.CsrfPreventionFilter.doFilter(CsrfPreventionFilter.java:186)
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:233)
at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at
org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:563)
at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:291)
at
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:859)
at
org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:602)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
at java.lang.Thread.run(Thread.java:662)
Caused by: java.lang.NullPointerException
at
org.drools.grid.service.directory.impl.WhitePagesClient.getGsd(WhitePagesClient.java:32)
at
org.drools.grid.service.directory.impl.WhitePagesClient.create(WhitePagesClient.java:80)
at org.drools.grid.impl.GridImpl.createGridNode(GridImpl.java:107)
at
org.drools.container.spring.beans.GridNodeBeanFactory.afterPropertiesSet(GridNodeBeanFactory.java:63)
at
org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1477)
at
org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1417)
... 47 more
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13 years, 8 months
Eclipse, Groovy and Drools - java.lang.NoClassDefFoundError
by sweeneymj
Hi,
I have just started trying out Drools and having an issue trying to run the
sample applications under Eclipse Helios with Groovy installed.
When I try run any sample Drools application I get the stack trace shown
below. I have looked around extensively on Google for assistance but have
been unable to find any thing that has helped me determine what the issue
is.
Any suggestions would be appreciated.
Regards
--
Build groovy files option has not been set one way or the other: use
'options.put(CompilerOptions.OPTIONG_BuildGroovyFiles,
CompilerOptions.ENABLED);'
java.lang.NoClassDefFoundError: org/eclipse/core/runtime/Plugin
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClassCond(ClassLoader.java:631)
at java.lang.ClassLoader.defineClass(ClassLoader.java:615)
at
java.security.SecureClassLoader.defineClass(SecureClassLoader.java:141)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:283)
at java.net.URLClassLoader.access$000(URLClassLoader.java:58)
at java.net.URLClassLoader$1.run(URLClassLoader.java:197)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
at
org.eclipse.jdt.internal.compiler.Compiler.initializeParser(Compiler.java:737)
at
org.eclipse.jdt.internal.compiler.Compiler.<init>(Compiler.java:294)
at
org.eclipse.jdt.internal.compiler.Compiler.<init>(Compiler.java:159)
at
org.drools.commons.jci.compilers.EclipseJavaCompiler.compile(EclipseJavaCompiler.java:364)
at
org.drools.commons.jci.compilers.AbstractJavaCompiler.compile(AbstractJavaCompiler.java:51)
at
org.drools.rule.builder.dialect.java.JavaDialect.compileAll(JavaDialect.java:366)
at
org.drools.compiler.DialectCompiletimeRegistry.compileAll(DialectCompiletimeRegistry.java:55)
at
org.drools.compiler.PackageRegistry.compileAll(PackageRegistry.java:69)
at
org.drools.compiler.PackageBuilder.compileAll(PackageBuilder.java:674)
at
org.drools.compiler.PackageBuilder.addPackage(PackageBuilder.java:633)
at
org.drools.compiler.PackageBuilder.addPackageFromDrl(PackageBuilder.java:278)
at
org.drools.compiler.PackageBuilder.addKnowledgeResource(PackageBuilder.java:451)
at
org.drools.builder.impl.KnowledgeBuilderImpl.add(KnowledgeBuilderImpl.java:28)
at com.sample.DroolsTest.readKnowledgeBase(DroolsTest.java:40)
at com.sample.DroolsTest.main(DroolsTest.java:23)
Caused by: java.lang.ClassNotFoundException: org.eclipse.core.runtime.Plugin
at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
... 27 more
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13 years, 8 months
Apply role to whole class hierarchy
by Joerg Henne
Hi all,
we are processing events through a Fusion rule base. To be recognized as
such, model classes must be declared as @role(event). We are using a rather
extensive hierarchy of events, all derived from a single abstract class.
Unfortunately, it doesn't seem to be possible to declare just this base
class as an event and have the 'event' role for the others derived from
that.
Is there a way around having to declare each and every single event class
separately?
Thanks
Joerg
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13 years, 8 months
fire a rule only once (for the time being)
by slyfox
It seems like there are many similar problems but I have not been able to
find anything that addresses my issue exactly.
I have a stock trading application, and I want to check if the price is out
of a range (high,low)
if the price goes below low, the problem is the rule keeps firing if the
price keeps going lower, this creates too much noise and overhead.
I thought maybe the no-loop and duration attributes would help but they
didnt.
I know I could check not(Fired()) and use insert fired but I believe that
spans the entire session which I do not want either.
Is there a way to say fire this rule if true once then wait a period of time
before I check again.
>From what Ive read maybe agenda filters, but I am not sure if that is
flexible enough.
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13 years, 8 months
How to iterate over a given rule multiple times
by RulesUsers
Hi All,
I have a specific requirement where in, i have my rules file as follows
rule "one"
when
//some condition
then
//fire a particular query & retrieve the count of records for a filter
condition
//Then populate it to some fact property using modify()
end
rule "two"
when
//check if the count of records is, say 100 after, the above modify
statement
then
//any further action
end
Now the problem is, I want to execute rule "one" again and again until rule
"two" is satisfied.
Two probable solutions I can think of is: -
1. Put some condition in rule "one", so that rule"one" is true until rule
"two" condition is satisfied. But that has a problem, rule"one" will still
fire even if rule "two" gets satisfied.
2. Other is, have some kind of third rule that will call rule "one",
when rule"two" is not satisfied.
Please provide your valuable inputs.
Thanks in advance.
Regards,
Sam
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13 years, 8 months
