switching off JIT compiler in 5.4.0.Final
by Willem van Asperen
Dear List,
Does anyone know of a way to disable JIT in 5.4.0.Final? There is a snag
in that version that seems to not play nice with my application. If
there is a way to disable it then I could just bridge the time until
5.4.1.Final is released.
I have tried the following:
-Dmvel.disable.jit=true
and
-Ddrools.permgenThreshold=0
but still the same issue.
Thanks,
Willem
11 years, 11 months
Declared Types with large number of fields
by Phani Saripalli
Hi.
I am using declared types in .drl rule rule. When I kept the number of
fields in a declared type low, drools works fine. When I am increasing the
number of fields in a declared type to 300 or even more, drools raising an
exception.
Particularly, it is giving this.
ava.lang.ClassFormatError: Too many arguments in method signature in class
file com/sample/Project
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClassCond(ClassLoader.java:631)
at java.lang.ClassLoader.defineClass(ClassLoader.java:615)
at
org.drools.rule.JavaDialectRuntimeData$PackageClassLoader.fastFindClass(JavaDialectRuntimeData.java:615)
at
org.drools.util.CompositeClassLoader$CachingLoader.load(CompositeClassLoader.java:254)
at
org.drools.util.CompositeClassLoader$CachingLoader.load(CompositeClassLoader.java:237)
at
org.drools.util.CompositeClassLoader.loadClass(CompositeClassLoader.java:88)
at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
at
org.drools.base.ClassTypeResolver.resolveType(ClassTypeResolver.java:155)
at
org.drools.compiler.PackageBuilder.processTypeDeclarations(PackageBuilder.java:2049)
at
org.drools.compiler.PackageBuilder.mergePackage(PackageBuilder.java:1218)
at org.drools.compiler.PackageBuilder.addPackage(PackageBuilder.java:829)
at
org.drools.compiler.PackageBuilder.addPackageFromDrl(PackageBuilder.java:467)
at
org.drools.compiler.PackageBuilder.addKnowledgeResource(PackageBuilder.java:673)
at
org.drools.builder.impl.KnowledgeBuilderImpl.add(KnowledgeBuilderImpl.java:45)
at
org.drools.builder.impl.KnowledgeBuilderImpl.add(KnowledgeBuilderImpl.java:34)
at com.sample.DroolsTest.readKnowledgeBase(DroolsTest.java:67)
at com.sample.DroolsTest.main(DroolsTest.java:24)
I suspect, it is something to do with creating class, constructor with so
many arguments at run time. I am looking for a solution, something like
declared types, or a workaround. The purpose for which I am using Drools
limits to use the traditional Java classes, or defining a Java class.
Also, is there any way, to perform calculations, or value propagations.
That, Drools could assume some value to a variable given a certain
constraint on it.
For example, x > 6 && x < 9, Drools could assume x as 7 or 8 and fire rules?
Thank you.
Phani
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11 years, 11 months
Stateless session with pre-inserted facts
by Chris Selwyn
I have a need to execute a set of rules on a complicated hierarchical data structure where some of the rules use a bunch of reference facts.
At the moment I load the reference facts and the hierarchical structure into the WM of a stateless session on every execution.
There are a lot of reference facts and they start off in the same state on every execution though they can get modified as part of the rules execution.
I would really like to be able to save the WM after inserting the reference facts so that I can start each execution with those facts pre-loaded and thereby avoid loading them each time.
Is this an easy thing to do? Could someone give me some pointers?
Chris
11 years, 11 months
Inserting String Object and accessing it in Guvnor
by Manasi
Hi,
Currently in my application I want to insert a *String object* into a
StatefulKnowledgeSession.
I don't want to insert object of any *User defined type* ,as input parameter
contains only one string parameter.
I am able to insert String object into my StatefulKnowledgeSession, but
don't know how to access it in Guvnor , as I want to use value from this
string object to satisfy one of the rule in my Guvnor decision table. I want
to use this String object as one of the condition columns in Guvnor.
Below is some code I am using:
StatefulKnowledgeSession session = kbase.newStatefulKnowledgeSession();
String myString = new String("department");
session.insert(myString);
session.fireAllRules();
Is there any way to access this String object in Guvnor?
Thanks,
Manasi.
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11 years, 11 months
