Adding jars for Guvnor to work
by richarda
Hi,
I have some rules that include a class that I created.. part of that class
requires the Apache common library.
When I run Drools in my application it all works fine as the Apache jar
files are in my classpath.
However, when I try to setup in Guvnor I am getting errors that the
classpath is not found.
Is there anyway to add jar files to the classpath of guvnor?
Cheers
Ric
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16 years, 1 month
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16 years, 1 month
exception while adding a packageDescr to a PackageBuilder
by DeepakA
I am trying to add a rule to a package.
First I create a PackageDescr, then I create a RuleDescr
and set some properties in it
com.deepak.development.Trade class is loaded into the working memory before
I try to create this rule
Upon doing a DrlDump, I get the following (which is correctly formed; if I
copy paste this in a drl file, the rule gets executed as expected)
rule "Added new Rule"
when
trade : com.deepak.development.Trade( )
then
System.out.println("Whatever");end
//////////////////////////
// CODE
//////////////////////////
//Create a PackageDescr
//packages[0] is the package that is already available,
//since I create a new PackageDescr with same name,
//I expect the new rule to be appended to the existing package
final PackageDescr packageDescr = new PackageDescr(new
Package(packages[0].getName()).getName());
//Create a RuleDescr
RuleDescr ruleDescr = new RuleDescr("Added new Rule");
String consequence = "System.out.println(\"Whatever\");";
AndDescr lhs = new AndDescr();
ruleDescr.setLhs( lhs );
final PatternDescr pattern = new PatternDescr(
com.deepak.development.Trade.class.getName(),"trade");
lhs.addDescr( pattern );
ruleDescr.setConsequence( consequence );
PackageBuilder builder = new PackageBuilder(packages[0]);
packageDescr.addRule( ruleDescr );
DrlDumper drlDumper = new DrlDumper();
System.out.println("Dumping Package Descriptor for all rules: "+
drlDumper.dump(packageDescr));
//Nullpointer Exception caught
builder.addPackage(packageDescr);
ruleBase.addPackage(builder.getPackage());
Doing a debug in eclipse I can see that a NullPointerException is caught in
the line ###builder.addPackage(packageDescr)###
Is there any other property I need to set in packageDescr before it can be
added to a builder?
I can see the following in the debug section of eclipse
PackageStore.read(String) line: 58
The following is shown in the Variables side (in eclispe debug mode)
[corresponds to PackageStore]
this PackageStore (id=13923)
errors ArrayList<E> (id=15898)
elementData Object[10] (id=19840)
modCount 0
size 0
javaDialectRuntimeData null
resourceName "java/lang/Object.class" (id=13925)
count 22
hash 0
offset 0
value (id=15896)
clazz null
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16 years, 1 month
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16 years, 1 month
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16 years, 1 month
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16 years, 1 month
Can't use global in RHS constructor call
by Barry Kaplan
In the following, [A] works but [B] yields the exception below. Is this some
kind of limitation of MVEL?
dialect "mvel"
...
global StateFactory stateFactory
global String NotOperating
...
rule "transition"
when
...
then
newState = stateFactory(NotOpering) // [A]
newState = new State(NotOperating) // [B]
end
----------------------
Caused by: [Error: unable to access property (null parent): NotOperating]
[Near : {... Unknown ....}]
^
[Line: 1, Column: 0]
at
org.mvel2.optimizers.impl.refl.ReflectiveAccessorOptimizer.getMethod(ReflectiveAccessorOptimizer.java:860)
at
org.mvel2.optimizers.impl.refl.ReflectiveAccessorOptimizer.getBeanProperty(ReflectiveAccessorOptimizer.java:584)
at
org.mvel2.optimizers.impl.refl.ReflectiveAccessorOptimizer.compileGetChain(ReflectiveAccessorOptimizer.java:312)
at
org.mvel2.optimizers.impl.refl.ReflectiveAccessorOptimizer.optimizeAccessor(ReflectiveAccessorOptimizer.java:138)
at org.mvel2.ast.ASTNode.getReducedValueAccelerated(ASTNode.java:133)
at
org.mvel2.compiler.ExecutableAccessor.getValue(ExecutableAccessor.java:41)
at
org.mvel2.optimizers.impl.refl.ReflectiveAccessorOptimizer.compileConstructor(ReflectiveAccessorOptimizer.java:1090)
at
org.mvel2.optimizers.impl.refl.ReflectiveAccessorOptimizer.optimizeObjectCreation(ReflectiveAccessorOptimizer.java:1047)
at
org.mvel2.ast.NewObjectNode.getReducedValueAccelerated(NewObjectNode.java:158)
at
org.mvel2.compiler.ExecutableAccessor.getValue(ExecutableAccessor.java:37)
at
org.mvel2.ast.AssignmentNode.getReducedValueAccelerated(AssignmentNode.java:89)
at org.mvel2.MVELRuntime.execute(MVELRuntime.java:85)
at
org.mvel2.compiler.CompiledExpression.getValue(CompiledExpression.java:104)
at org.mvel2.MVEL.executeExpression(MVEL.java:995)
at org.drools.base.mvel.MVELConsequence.evaluate(MVELConsequence.java:87)
at org.drools.common.DefaultAgenda.fireActivation(DefaultAgenda.java:966)
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16 years, 1 month
Human Task Question on Mina client / server
by Todd Pagni
I am creating a human task in a flow, but I am unable to get the human
task in the Mina client. Should items that enter a humanTaskNode go
into the task table in addition to the workItemInfo table? Do I need to
do anything to get the work item set as a potential owner for
Administrator so it is returned to the Mina client?
I running drools 5.0.1 in JBoss:
1. Create the human task node in the flow:
addActionStep(factory,
3).joinNode(4).type(Join.TYPE_XOR).done().humanTaskNode(5)
.name("Approve")
.actorId("Administrator")
.taskName("Approve")
.comment("hi")
.content("random content")
2. Start the flow process (after this step I a row in the
workItemInfo table):
StatefulKnowledgeSession ksession = km.getSession(kb);
WSHumanTaskHandler approveTask = new WSHumanTaskHandler();
/* Setup workitemmanager here? */
org.drools.runtime.process.WorkItemManager wm =
ksession.getWorkItemManager();
wm.registerWorkItemHandler("Approve", approveTask);
ksession.setGlobal("entity", e);
ksession.startProcess(DuckFlowBuilder.PROCESS_NAME);
return ksession;
See the following in the log after this step:
14:37:15,349 INFO [STDOUT] Hibernate: insert into SessionInfo (dirty,
lastModificationDate, rulesByteArray, startDate) values (?, ?, ?, ?)
14:37:15,364 INFO [STDOUT] Hibernate: insert into ProcessInstanceInfo
(lastModificationDate, lastReadDate, processId,
processInstanceByteArray, startDate, state, OPTLOCK) values (?, ?, ?, ?,
?, ?, ?)
14:37:15,364 INFO [STDOUT] Entity name: Mallardes, Step: 3
14:37:15,364 INFO [STDOUT] Hibernate: insert into WorkItemInfo
(creationDate, name, processInstanceId, state, OPTLOCK,
workItemByteArray) values (?, ?, ?, ?, ?, ?)
14:37:15,364 ERROR [STDERR] Could not find work item handler for Human
Task
14:37:15,364 INFO [STDOUT] Hibernate: update ProcessInstanceInfo set
lastModificationDate=?, lastReadDate=?, processId=?,
processInstanceByteArray=?, startDate=?, state=?, OPTLOCK=? where
processInstanceId=? and OPTLOCK=?
14:37:15,364 INFO [STDOUT] Hibernate: update WorkItemInfo set
creationDate=?, name=?, processInstanceId=?, state=?, OPTLOCK=?,
workItemByteArray=? where workItemId=? and OPTLOCK=?
14:37:15,364 INFO [STDOUT] Hibernate: update SessionInfo set dirty=?,
lastModificationDate=?, rulesByteArray=?, startDate=? where id=?
3. Start the mina server (don't see anything in the task table)
EntityManagerFactory emf =
Persistence.createEntityManagerFactory("org.drools.task");
taskService = new
TaskService(emf,SystemEventListenerFactory.getSystemEventListener())
server = new MinaTaskServer( taskService );
Thread thread = new Thread( server );
thread.start();
Thread.sleep( 500 );
System.out.println("Server started ...");
4. Run the mina client (no results returned)
BlockingTaskSummaryResponseHandler summaryHandler =
new BlockingTaskSummaryResponseHandler()
client.getTasksAssignedAsPotentialOwner("Administrator",
"en-UK",summaryHandler);
List<TaskSummary> tasks = summaryHandler.getResults();
Thanks,
Todd
16 years, 1 month
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16 years, 1 month
