Using "collect" repeatedly over sub-groups of a fact
by Mike Goldner
I have a single rule that includes a "collect" pattern to pass a collection
to the RHS. However, what I now need to do fire this rule for multiple
collections based on groupings defined by attributes on the fact.
Here is an example:
Fact(a = 1, b = 1, c = 1)
Fact(a = 1, b = 1, c = 2)
Fact(a = 2, b = 1, c = 3)
Fact(a = 2, b = 2, c = 4)
Fact(a = 2, b = 2, c = 5)
I would like to create sub-groups based on the attributes 'a' and 'b'. My
rule should fire three times for the facts listed above, providing the
corresponding collection of Fact.
The only solution that I can think of is to build a HashSet and add each
Fact to the HashSet using the attributes as keys. I suppose it would have
to be a nested set since I can't define a multi-valued key class within a
rule. I could then handle this HashSet in a RHS block. However, I realize
that I'm completely subverting the whole rule language
Any suggestions?
Thanks,
Mike
11 years, 11 months
5.4.0.Final Eclipse plug-in exception
by Sean Su
The generated dslr from "new drools source" can't be opened inside Eclipse
3.7 due to the following exception. It works fine in the previous version:
java.lang.ArrayIndexOutOfBoundsException: 1
at
org.eclipse.swt.custom.StyledTextRenderer.calculateClientArea(StyledTextRenderer.java:230)
at org.eclipse.swt.custom.StyledText.handleResize(StyledText.java:6148)
at
org.eclipse.swt.custom.StyledText$7.handleEvent(StyledText.java:5641)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1053)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1077)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1058)
at org.eclipse.swt.widgets.Control.WM_SIZE(Control.java:5173)
at org.eclipse.swt.widgets.Scrollable.WM_SIZE(Scrollable.java:291)
at org.eclipse.swt.widgets.Composite.WM_SIZE(Composite.java:1662)
at org.eclipse.swt.widgets.Canvas.WM_SIZE(Canvas.java:454)
at org.eclipse.swt.widgets.Control.windowProc(Control.java:4603)
at org.eclipse.swt.widgets.Canvas.windowProc(Canvas.java:341)
at org.eclipse.swt.widgets.Display.windowProc(Display.java:4972)
at org.eclipse.swt.internal.win32.OS.DefWindowProcW(Native Method)
at org.eclipse.swt.internal.win32.OS.DefWindowProc(OS.java:2526)
at
org.eclipse.swt.widgets.Scrollable.callWindowProc(Scrollable.java:80)
at
org.eclipse.swt.widgets.Control.WM_WINDOWPOSCHANGED(Control.java:5408)
at org.eclipse.swt.widgets.Canvas.WM_WINDOWPOSCHANGED(Canvas.java:460)
at org.eclipse.swt.widgets.Control.windowProc(Control.java:4616)
at org.eclipse.swt.widgets.Canvas.windowProc(Canvas.java:341)
at org.eclipse.swt.widgets.Display.windowProc(Display.java:4972)
at org.eclipse.swt.internal.win32.OS.SetWindowPos(Native Method)
at org.eclipse.swt.widgets.Widget.SetWindowPos(Widget.java:1457)
at org.eclipse.swt.widgets.Control.forceResize(Control.java:1121)
at
org.eclipse.swt.widgets.ScrollBar.getThumbTrackBounds(ScrollBar.java:464)
at
org.eclipse.jface.text.source.SourceViewer$RulerLayout.computeScrollArrowHeights(SourceViewer.java:224)
at
org.eclipse.jface.text.source.SourceViewer$RulerLayout.getVerticalScrollArrowHeights(SourceViewer.java:204)
at
org.eclipse.jface.text.source.SourceViewer$RulerLayout.layout(SourceViewer.java:159)
at org.eclipse.swt.widgets.Composite.updateLayout(Composite.java:1263)
at org.eclipse.swt.widgets.Composite.updateLayout(Composite.java:1249)
at org.eclipse.swt.widgets.Composite.layout(Composite.java:664)
at org.eclipse.swt.widgets.Composite.layout(Composite.java:622)
at
org.eclipse.jface.text.source.CompositeRuler.layoutTextViewer(CompositeRuler.java:611)
at
org.eclipse.jface.text.source.CompositeRuler.addDecorator(CompositeRuler.java:565)
at
org.eclipse.jface.text.source.projection.ProjectionViewer.addVerticalRulerColumn(ProjectionViewer.java:1289)
at
org.eclipse.jface.text.source.projection.ProjectionSupport.doEnableProjection(ProjectionSupport.java:310)
at
org.eclipse.jface.text.source.projection.ProjectionSupport$ProjectionListener.projectionEnabled(ProjectionSupport.java:143)
at
org.eclipse.jface.text.source.projection.ProjectionViewer.fireProjectionEnabled(ProjectionViewer.java:489)
at
org.eclipse.jface.text.source.projection.ProjectionViewer.enableProjection(ProjectionViewer.java:537)
at
org.eclipse.jface.text.source.projection.ProjectionViewer.doOperation(ProjectionViewer.java:1441)
at
org.drools.eclipse.editors.AbstractRuleEditor.createPartControl(AbstractRuleEditor.java:84)
at
org.eclipse.ui.part.MultiPageEditorPart.addPage(MultiPageEditorPart.java:241)
at org.eclipse.ui.forms.editor.FormEditor.addPage(FormEditor.java:325)
at
org.eclipse.ui.part.MultiPageEditorPart.addPage(MultiPageEditorPart.java:211)
at org.eclipse.ui.forms.editor.FormEditor.addPage(FormEditor.java:308)
at
org.drools.eclipse.dsl.editor.DSLRuleEditor2.addPages(DSLRuleEditor2.java:64)
at
org.eclipse.ui.forms.editor.FormEditor.createPages(FormEditor.java:138)
at
org.eclipse.ui.part.MultiPageEditorPart.createPartControl(MultiPageEditorPart.java:348)
at
org.eclipse.ui.internal.EditorReference.createPartHelper(EditorReference.java:670)
at
org.eclipse.ui.internal.EditorReference.createPart(EditorReference.java:465)
at
org.eclipse.ui.internal.WorkbenchPartReference.getPart(WorkbenchPartReference.java:595)
at org.eclipse.ui.internal.PartPane.setVisible(PartPane.java:313)
at
org.eclipse.ui.internal.presentations.PresentablePart.setVisible(PresentablePart.java:180)
at
org.eclipse.ui.internal.presentations.util.PresentablePartFolder.select(PresentablePartFolder.java:270)
at
org.eclipse.ui.internal.presentations.util.LeftToRightTabOrder.select(LeftToRightTabOrder.java:65)
at
org.eclipse.ui.internal.presentations.util.TabbedStackPresentation.selectPart(TabbedStackPresentation.java:473)
at
org.eclipse.ui.internal.PartStack.refreshPresentationSelection(PartStack.java:1245)
at org.eclipse.ui.internal.PartStack.setSelection(PartStack.java:1198)
at org.eclipse.ui.internal.PartStack.showPart(PartStack.java:1597)
at org.eclipse.ui.internal.PartStack.add(PartStack.java:493)
at org.eclipse.ui.internal.EditorStack.add(EditorStack.java:103)
at org.eclipse.ui.internal.PartStack.add(PartStack.java:479)
at org.eclipse.ui.internal.EditorStack.add(EditorStack.java:112)
at
org.eclipse.ui.internal.EditorSashContainer.addEditor(EditorSashContainer.java:63)
at
org.eclipse.ui.internal.EditorAreaHelper.addToLayout(EditorAreaHelper.java:225)
at
org.eclipse.ui.internal.EditorAreaHelper.addEditor(EditorAreaHelper.java:213)
at
org.eclipse.ui.internal.EditorManager.createEditorTab(EditorManager.java:808)
at
org.eclipse.ui.internal.EditorManager.openEditorFromDescriptor(EditorManager.java:707)
at
org.eclipse.ui.internal.EditorManager.openEditor(EditorManager.java:666)
at
org.eclipse.ui.internal.WorkbenchPage.busyOpenEditorBatched(WorkbenchPage.java:2942)
at
org.eclipse.ui.internal.WorkbenchPage.busyOpenEditor(WorkbenchPage.java:2850)
at
org.eclipse.ui.internal.WorkbenchPage.access$11(WorkbenchPage.java:2842)
at
org.eclipse.ui.internal.WorkbenchPage$10.run(WorkbenchPage.java:2793)
at
org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:70)
at
org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:2789)
at
org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:2773)
at
org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:2764)
at org.eclipse.ui.ide.IDE.openEditor(IDE.java:651)
at org.eclipse.ui.ide.IDE.openEditor(IDE.java:610)
at
org.eclipse.jdt.internal.ui.javaeditor.EditorUtility.openInEditor(EditorUtility.java:355)
at
org.eclipse.jdt.internal.ui.javaeditor.EditorUtility.openInEditor(EditorUtility.java:164)
at org.eclipse.jdt.ui.actions.OpenAction.run(OpenAction.java:249)
at org.eclipse.jdt.ui.actions.OpenAction.run(OpenAction.java:228)
at
org.eclipse.jdt.ui.actions.SelectionDispatchAction.dispatchRun(SelectionDispatchAction.java:275)
at
org.eclipse.jdt.ui.actions.SelectionDispatchAction.run(SelectionDispatchAction.java:251)
at
org.eclipse.jdt.internal.ui.packageview.PackageExplorerActionGroup.handleOpen(PackageExplorerActionGroup.java:376)
at
org.eclipse.jdt.internal.ui.packageview.PackageExplorerPart$4.open(PackageExplorerPart.java:538)
at
org.eclipse.ui.OpenAndLinkWithEditorHelper$InternalListener.open(OpenAndLinkWithEditorHelper.java:48)
at
org.eclipse.jface.viewers.StructuredViewer$2.run(StructuredViewer.java:866)
at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
at org.eclipse.ui.internal.JFaceUtil$1.run(JFaceUtil.java:49)
at org.eclipse.jface.util.SafeRunnable.run(SafeRunnable.java:175)
at
org.eclipse.jface.viewers.StructuredViewer.fireOpen(StructuredViewer.java:864)
at
org.eclipse.jface.viewers.StructuredViewer.handleOpen(StructuredViewer.java:1152)
at
org.eclipse.jface.viewers.StructuredViewer$6.handleOpen(StructuredViewer.java:1256)
at
org.eclipse.jface.util.OpenStrategy.fireOpenEvent(OpenStrategy.java:275)
at org.eclipse.jface.util.OpenStrategy.access$2(OpenStrategy.java:269)
at
org.eclipse.jface.util.OpenStrategy$1.handleEvent(OpenStrategy.java:309)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1053)
at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:4165)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3754)
at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2696)
at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2660)
at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2494)
at org.eclipse.ui.internal.Workbench$7.run(Workbench.java:674)
at
org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
at
org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:667)
at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
at
org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:123)
at
org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196)
at
org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:110)
at
org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:79)
at
org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:344)
at
org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:179)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:622)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:577)
at org.eclipse.equinox.launcher.Main.run(Main.java:1410)
--
"But beware of the Dark Side. Anger, fear, aggression - the Dark Side of
the Force are they." -Yoda
11 years, 11 months
The drools.packagebuilder.conf directory
by Carolina Pellecchia
Hi all
I am novice on GUVNOR/DROOLS, but I defined some Drools Evaluator
functions and to make the function available to the rules engine I inserted
drools.packagebuilder.conf into user home directory. Is there different
directory to do this?
Thank you in advance,
Carolina Pellecchia
11 years, 11 months
Error with Helloworld Drools projet
by paco
Hello everybody,
I want to create my first drools projet with eclipse and I've got this
following error.
org.drools.RuntimeDroolsException: Unable to load dialect
'org.drools.rule.builder.dialect.java.JavaDialectConfiguration:java'
.............................
......................
Caused by: java.lang.RuntimeException: The Eclipse JDT Core jar is not in
the classpath
............................
.................
... 7 more
Please cant somebody tell me what's wrong with my program.
I've used an eclipse Eclipse Java EE IDE for Web Developers; and drools
4.0.7
Thanks
--
View this message in context: http://drools.46999.n3.nabble.com/Error-with-Helloworld-Drools-projet-tp3...
Sent from the Drools: User forum mailing list archive at Nabble.com.
11 years, 11 months
Will StatefulKnowledgeSession.fireallrules() block in this case ?
by soumya_sd
My question is if I call re.callRuleEngine(facts) in the same thread (which
in turn calls knowledgeSession.fireallrules()) will it "block" till
a) ALL rules are fired (i.e., THEN part of rule is executed for all
matching facts in working memory)
AND
b) MyChannel.send() is executed for all matching facts i.e., the list of
FilteredFacts inside my MyChannel object is populated completely at the end
of the blocking call.
Thanks.
-------------------------------------------------------------------------------------
RuleEngine re = RuleEngine();
re.callRuleEngine(facts);
-----------------------------------------------------------------------------------
rule.drl
rule "some_rule"
dialect "mvel"
when
$my_var : MyValueObject( x > 4.0 )
then
channels["my_drools_channel"].send($my_var);
end
-----------------------------------------------------------------------------------
RuleEngine
{
RuleEngine{
KnowledgeBase knowledgeBase = null;
try {
knowledgeBase = createKnowledgeBase();
} catch (Exception e) {
e.printStackTrace();
}
knowledgeSession = knowledgeBase.newStatefulKnowledgeSession();
knowledgeSession.registerChannel("my_drools_channel", new MyChannel());
}
void callRuleEngine(List<MyValueObject> facts)
{
// insert Facts into
// the working memory.
for (Object fact : facts) {
knowledgeSession.insert(fact);
}
knowledgeSession.fireallrules();
}
}
-----------------------------------------------------------------------------------
public class MyChannel implements Channel {
private List<MyValueObject> filteredFacts;
@Override
public void send(Object object) {
if( object instanceof MyValueObject )
{
MyValueObject obj = (MyValueObject)object;
filteredFacts.add(obj)
}
}
}
--
View this message in context: http://drools.46999.n3.nabble.com/Will-StatefulKnowledgeSession-fireallru...
Sent from the Drools: User forum mailing list archive at Nabble.com.
11 years, 11 months
Use of ruleflows in Guvnor
by dollanitri
Hi All,
Currently i'm trying to do a small POC on drools and ruleflows integrating
with Java Custom Application.
Here below are the details:
-- Created decision tables in Guvnor Web based UI and ruleflows in Eclipse
using jBPM plugin.
-- Exposed Drools API into one of the java helper class and called ruleflows
using startprocess.
-- When process starts then it calls Decision tables (by hard coding the
decision table name) from the ruleflow (.rf)
-- Finally getting output from the decision table returned action.
Here my question is
1) There is a option in Guvnor to upload ruleflows (.rf), but seems to be
that its not working.
I tried to upload newly created ruleflow into Guvnor and shown uploaded
successfully, however its not at all using anywhere.
Question : how this ruleflow works in Guvnor after uploading into it?
--
View this message in context: http://drools.46999.n3.nabble.com/Use-of-ruleflows-in-Guvnor-tp3977643.html
Sent from the Drools: User forum mailing list archive at Nabble.com.
11 years, 12 months
