Can When part of DRL contains simple logics?
by wtang
I have the following code to set a Calendar object at Jan-1-2013 and roll it
3 days to 1-4-2013 and test to see if it is less then the current date.
This in all done inside the THEN part of a DRL rule
then
Calendar c = Calendar.getInstance();
c.set(2013, 1, 1);
c.roll(3, true);
if (c.getTime().before(new Date())) {
System.out.println("successfully rolled 3 days ahead");
}
How to you do this in the WHEN part of a DRL rule?
--
View this message in context: http://drools.46999.n3.nabble.com/Can-When-part-of-DRL-contains-simple-lo...
Sent from the Drools: User forum mailing list archive at Nabble.com.
10 years, 3 months
Problem with declare event
by Demian Calcaprina
Hey Guys, I am having a drools compilation error when declaring an error.
I tried to isolate this as much as possible.
https://github.com/droolsjbpm/drools/blob/master/drools-compiler/src/test...
I just added after the given line, this:
header = header + " declare Message\n "+
" @role(event) \n " +
" end \n ";
And I get this exception:
java.lang.NullPointerException
at java.io.FilterOutputStream.write(FilterOutputStream.java:97)
at
org.drools.compiler.compiler.io.memory.MemoryFileSystem.writeJarEntries(MemoryFileSystem.java:437)
at
org.drools.compiler.compiler.io.memory.MemoryFileSystem.writeJarEntries(MemoryFileSystem.java:430)
at
org.drools.compiler.compiler.io.memory.MemoryFileSystem.writeJarEntries(MemoryFileSystem.java:430)
at
org.drools.compiler.compiler.io.memory.MemoryFileSystem.writeJarEntries(MemoryFileSystem.java:430)
at
org.drools.compiler.compiler.io.memory.MemoryFileSystem.zip(MemoryFileSystem.java:387)
at
org.drools.compiler.compiler.io.memory.MemoryFileSystem.writeAsBytes(MemoryFileSystem.java:365)
at
org.drools.compiler.kie.builder.impl.MemoryKieModule.getBytes(MemoryKieModule.java:64)
at
org.drools.compiler.CommonTestMethodBase.createKJar(CommonTestMethodBase.java:421)
at
org.drools.compiler.integrationtests.IncrementalCompilationTest.createAndDeployJar(IncrementalCompilationTest.java:205)
at
org.drools.compiler.integrationtests.IncrementalCompilationTest.testLoadOrderAfterRuleRemoval(IncrementalCompilationTest.java:70)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:601)
at
org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:47)
at
org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at
org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:44)
at
org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:271)
at
org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:70)
at
org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:238)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:63)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:236)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:53)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:229)
at org.junit.runners.ParentRunner.run(ParentRunner.java:309)
at
org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)
at
org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)
Any idea on how to declare an event on the drl?
Thanks!
Demian
10 years, 3 months
Rules confilct and resulution strategy
by bobby nick
I am using Drools 5.5 and I have two drl files, i.e. Sample.drl, Sample1.drl, with four rules, two
sets of duplicate rules. When I assert facts, rules from Sample1.drl
file is getting fired. I assume in this situation rules are in conflict, therefore rules engine using rules resolution strategy firing rules
loaded last to knowledge base. But I don't find any documentation
indicating what leads to conflict in rules.
If anyone in mailing list has experienced
similar issue, appreciate if you could share.
Thanks,Amit
10 years, 3 months
Process' RulesetNode and SplitNode working memory
by kenhelmes
Hello,
I am working on proof-of-concept with the Process API. A small cutout of
code shows an example process:
startnode->actionnode->rulesetnode-splitnode(gateway). The process flow
starts and runs normally.
However, the splitnode constraint does not seem to use the working memory of
the rulesetnode and never finds a rule hit. Does the splitnode constraint
rule generated by drools, use the same working memory as the rulesetnodes?
If a rulesetnode has one ruleflow-group, is there a way to put the splitnode
constraint rule into the same ruleflow-group?
// Nodes
.startNode(1)
.name("Start")
.done()
.actionNode(2)
.name("Action")
.action("java", "System.out.println(\"Starting process\");")
.done()
.ruleSetNode(3)
.name("City is in list")
.ruleFlowGroup("CityRules")
.done()
// Gateway
.splitNode(11)
.name("Split 11")
.type(Split.TYPE_XOR)
.constraint(4, "yes", "rule", "mvel",
"City(name == \"Copenhagen\")")
.constraint(92, "no", "rule", "mvel",
"not City(name == \"Copenhagen\")")
.done()
--
View this message in context: http://drools.46999.n3.nabble.com/Process-RulesetNode-and-SplitNode-worki...
Sent from the Drools: User forum mailing list archive at Nabble.com.
10 years, 3 months
