What's wrong with this rule
by 赵侃侃
Hello,
With the help from the community I managed to get my first rule working, and
I'm trying to write my second rule on my own but it just doesn't seem to
work correctly.
Here is the scenario, what I want is to identify a pattern that there's no
EventB coming in within 2 minutes with a particular index value.
For example, EventB would have a property named index and assume the value
of index would be either 0 or 1.
Before firing the rules, I would manually insert facts of possibleIndex with
value 0 and 1 into the workingMemory.
Within 2 minutes, if there only comes one EventB with index valued 0 then
the system should report no EventB coming in with index value 1 in last 2
minutes.
Vice versa, in the case of only coming one EventB with index valued 1 then
the system should report no EventB coming in with index value 0 in last 2
minutes.
If within 2 minutes, there comes 2 EventB with both value 0 and 1 then
nothing should report.
Here is what I wrote, but it doesn't seem to work correctly.
I used a timer to fire this rule every 10 seconds because I don't think the
rule would run automatically if I don't add that. (not too sure though)
rule "no B in 2 minutes"
timer (0 10s)
when
possibleIndex( $index : index ) from entry-point "Event stream"
$p : PatternConsumer ( name == 'no B' && index == $index )
not ( EventB( index == $index && this after[0ms,2m] $p) over window:time(2m)
from entry-point "Event stream" )
then
PatternConsumer pc = new PatternConsumer( "no B", $index );
insert(pc);
System.out.println("no B in 2 minutes " + $index);
end
Best Regards,
Kevin Zhao
13 years, 5 months
Internal error in Drools Plugin
by marc.schneiderman
Environment
-----------------
Windows 7 64bit
Java 1.6 JRE
Eclipse SDK 3.5.2
GEF 3.5.2
Drools 5.1 GA Eclipse Workbench
When importing a very simple drools project ( a personal implementation of
the classic fibonacci problem), which had worked fine without any build or
runtime errors when using drools 5.0, I received the following two build
errors in the Eclipse environment. I tried looking on the Nabble news group
but did not find any similar postings. Also Googled the errors but to no
avail. Any help would be very much appreciated. Thanks.
ERROR #1
-----------
Internal error in Drools plugin:
org.drools.RuntimeDroolsException: value '1.4' is not a valid language level
at
org.drools.rule.builder.dialect.java.JavaDialectConfiguration.setJavaLanguageLevel(JavaDialectConfiguration.java:79)
at org.drools.eclipse.DroolsEclipsePlugin.generateParsedResource(Unknown
Source)
at org.drools.eclipse.DroolsEclipsePlugin.generateParsedResource(Unknown
Source)
at org.drools.eclipse.DroolsEclipsePlugin.parseResource(Unknown Source)
at
org.drools.eclipse.editors.DroolsLineBreakpointAdapter.canToggleLineBreakpoints(Unknown
Source)
at
org.eclipse.debug.ui.actions.ToggleBreakpointAction.update(ToggleBreakpointAction.java:187)
at
org.eclipse.ui.texteditor.AbstractRulerActionDelegate.update(AbstractRulerActionDelegate.java:132)
at
org.eclipse.ui.texteditor.AbstractRulerActionDelegate.setActiveEditor(AbstractRulerActionDelegate.java:89)
at
org.eclipse.debug.ui.actions.RulerToggleBreakpointActionDelegate.setActiveEditor(RulerToggleBreakpointActionDelegate.java:98)
at
org.eclipse.ui.internal.EditorPluginAction.editorChanged(EditorPluginAction.java:75)
at
org.eclipse.ui.internal.EditorActionBuilder$EditorContribution.editorChanged(EditorActionBuilder.java:83)
at
org.eclipse.ui.internal.EditorActionBuilder$ExternalContributor.setActiveEditor(EditorActionBuilder.java:129)
at
org.eclipse.ui.internal.EditorActionBars.partChanged(EditorActionBars.java:345)
at org.eclipse.ui.internal.WorkbenchPage$3.run(WorkbenchPage.java:632)
at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
at org.eclipse.core.runtime.Platform.run(Platform.java:888)
at
org.eclipse.ui.internal.WorkbenchPage.activatePart(WorkbenchPage.java:621)
at
org.eclipse.ui.internal.WorkbenchPage.setActivePart(WorkbenchPage.java:3527)
at org.eclipse.ui.internal.WorkbenchPage.activate(WorkbenchPage.java:614)
at
org.eclipse.ui.internal.WorkbenchPage.showEditor(WorkbenchPage.java:2943)
at
org.eclipse.ui.internal.WorkbenchPage.busyOpenEditorBatched(WorkbenchPage.java:2843)
at
org.eclipse.ui.internal.WorkbenchPage.busyOpenEditor(WorkbenchPage.java:2762)
at org.eclipse.ui.internal.WorkbenchPage.access$11(WorkbenchPage.java:2754)
at org.eclipse.ui.internal.WorkbenchPage$10.run(WorkbenchPage.java:2705)
at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:70)
at
org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:2701)
at
org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:2685)
at
org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:2676)
at org.eclipse.ui.ide.IDE.openEditor(IDE.java:651)
at org.eclipse.ui.ide.IDE.openEditor(IDE.java:610)
at org.eclipse.ui.ide.IDE.openEditor(IDE.java:1105)
at
org.eclipse.ui.internal.views.markers.ExtendedMarkersView.openMarkerInEditor(ExtendedMarkersView.java:254)
at
org.eclipse.ui.internal.views.markers.ExtendedMarkersView.openSelectedMarkers(ExtendedMarkersView.java:1572)
at
org.eclipse.ui.internal.views.markers.ExtendedMarkersView$4.open(ExtendedMarkersView.java:568)
at
org.eclipse.ui.OpenAndLinkWithEditorHelper$InternalListener.open(OpenAndLinkWithEditorHelper.java:48)
at
org.eclipse.jface.viewers.StructuredViewer$2.run(StructuredViewer.java:842)
at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
at org.eclipse.core.runtime.Platform.run(Platform.java:888)
at org.eclipse.ui.internal.JFaceUtil$1.run(JFaceUtil.java:48)
at org.eclipse.jface.util.SafeRunnable.run(SafeRunnable.java:175)
at
org.eclipse.jface.viewers.StructuredViewer.fireOpen(StructuredViewer.java:840)
at
org.eclipse.jface.viewers.StructuredViewer.handleOpen(StructuredViewer.java:1101)
at
org.eclipse.jface.viewers.StructuredViewer$6.handleOpen(StructuredViewer.java:1205)
at org.eclipse.jface.util.OpenStrategy.fireOpenEvent(OpenStrategy.java:264)
at org.eclipse.jface.util.OpenStrategy.access$2(OpenStrategy.java:258)
at org.eclipse.jface.util.OpenStrategy$1.handleEvent(OpenStrategy.java:298)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1003)
at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3910)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3503)
at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2405)
at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2369)
at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2221)
at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:500)
at
org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
at
org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:493)
at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
at
org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:113)
at
org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:194)
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:368)
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:559)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:514)
at org.eclipse.equinox.launcher.Main.run(Main.java:1311)
at org.eclipse.equinox.launcher.Main.main(Main.java:1287)
ERROR #2
----------
Unable to create view ID org.eclipse.ui.views.ContentOutline: value '1.4' is
not a valid language level:
org.drools.RuntimeDroolsException: value '1.4' is not a valid language level
at
org.drools.rule.builder.dialect.java.JavaDialectConfiguration.setJavaLanguageLevel(JavaDialectConfiguration.java:79)
at org.drools.eclipse.DroolsEclipsePlugin.generateParsedResource(Unknown
Source)
at org.drools.eclipse.DroolsEclipsePlugin.parseResource(Unknown Source)
at
org.drools.eclipse.editors.outline.RuleContentOutlinePage.initRules(Unknown
Source)
at org.drools.eclipse.editors.outline.RuleContentOutlinePage.update(Unknown
Source)
at
org.drools.eclipse.editors.outline.RuleContentOutlinePage.createControl(Unknown
Source)
at
org.eclipse.ui.views.contentoutline.ContentOutline.doCreatePage(ContentOutline.java:137)
at org.eclipse.ui.part.PageBookView.createPage(PageBookView.java:409)
at org.eclipse.ui.part.PageBookView.partActivated(PageBookView.java:752)
at org.eclipse.ui.part.PageBookView.showBootstrapPart(PageBookView.java:921)
at org.eclipse.ui.part.PageBookView.createPartControl(PageBookView.java:492)
at
org.eclipse.ui.views.contentoutline.ContentOutline.createPartControl(ContentOutline.java:121)
at
org.eclipse.ui.internal.ViewReference.createPartHelper(ViewReference.java:367)
at org.eclipse.ui.internal.ViewReference.createPart(ViewReference.java:226)
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.ViewPane.setVisible(ViewPane.java:529)
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:1256)
at org.eclipse.ui.internal.PartStack.createControl(PartStack.java:668)
at org.eclipse.ui.internal.PartStack.createControl(PartStack.java:576)
at
org.eclipse.ui.internal.PartSashContainer.createControl(PartSashContainer.java:568)
at
org.eclipse.ui.internal.PerspectiveHelper.activate(PerspectiveHelper.java:272)
at org.eclipse.ui.internal.Perspective.onActivate(Perspective.java:982)
at org.eclipse.ui.internal.WorkbenchPage.onActivate(WorkbenchPage.java:2626)
at org.eclipse.ui.internal.WorkbenchWindow$27.run(WorkbenchWindow.java:2965)
at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:70)
at
org.eclipse.ui.internal.WorkbenchWindow.setActivePage(WorkbenchWindow.java:2946)
at
org.eclipse.ui.internal.WorkbenchWindow$21.runWithException(WorkbenchWindow.java:2263)
at
org.eclipse.ui.internal.StartupThreading$StartupRunnable.run(StartupThreading.java:31)
at org.eclipse.swt.widgets.RunnableLock.run(RunnableLock.java:35)
at
org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:134)
at org.eclipse.swt.widgets.Display.runAsyncMessages(Display.java:3885)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3506)
at
org.eclipse.ui.application.WorkbenchAdvisor.openWindows(WorkbenchAdvisor.java:803)
at
org.eclipse.ui.internal.Workbench$28.runWithException(Workbench.java:1384)
at
org.eclipse.ui.internal.StartupThreading$StartupRunnable.run(StartupThreading.java:31)
at org.eclipse.swt.widgets.RunnableLock.run(RunnableLock.java:35)
at
org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:134)
at org.eclipse.swt.widgets.Display.runAsyncMessages(Display.java:3885)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3506)
at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2316)
at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2221)
at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:500)
at
org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
at
org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:493)
at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
at
org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:113)
at
org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:194)
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:368)
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:559)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:514)
at org.eclipse.equinox.launcher.Main.run(Main.java:1311)
at org.eclipse.equinox.launcher.Main.main(Main.java:1287)
--
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13 years, 5 months
Equality vs Equality
by H.C.
We have the potential for duplicate data and so we have some rules we wrote
to de-dupe things. We are attempting the check if we have two different
objects in memory but they equal each other by equals(). We have overridden
equal() and hashCode() in all our classes.
I came a cross two variations of the same de-duping rule that yields
different results but to me seems logically equivalent. How do these two
rules apply equality differently?
v1:
<code>rule "Ensure no ConfigurationEntities are duplicates of others"
when
$config1 : ConfigurationEntity( )
$config2 : ConfigurationEntity( eval( $config1 != $config2 ) && this ==
$config1 )
then
errorList.add( new ConfigError( ConfigErrorCodes.DUPLICATE_CONFIGURATION,
$config1 ));
end</code>
v2:
<code>rule "Ensure no ConfigurationEntities are duplicates of others"
when
$config1 : ConfigurationEntity( )
$config2 : ConfigurationEntity( )
eval( $config1 != $config2 && $config2.equals($config1) )
then
errorList.add( new ConfigError( ConfigErrorCodes.DUPLICATE_CONFIGURATION,
$config1 ));
end</code>
Our understanding is that:
1. eval( $config1 != $config2 ) compares the memory reference
2. this == $config1 is the same thing as eval( $config2.equals($config1) )
Given our disparate results, our assumptions must be wrong somewhere. Would
very much appreciate some insight.
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13 years, 5 months
check if a
by Tina Vießmann
Is it possible to write the following conditions without using eval?
$object : MyObject ( $valueList : valueList ) // of type List
$ value : Value ( // other restrictions
&& eval( !($valueList.contains($value)) ) )
Thank you :)
Tina
13 years, 5 months
Re: [rules-users] check if a
by Greg Barton
$value : Value( $value : value, // other restrictions )
$object : MyObject( $value not memberOf valueList )
GreG
On Nov 1, 2010, at 9:55, Tina Vießmann <tviessmann(a)stud.hs-bremen.de> wrote:
Is it possible to write the following conditions without using eval?
$object : MyObject ( $valueList : valueList ) // of type List
$ value : Value ( // other restrictions
&& eval( !($valueList.contains($value)) ) )
Thank you :)
Tina
_______________________________________________
rules-users mailing list
rules-users(a)lists.jboss.org
https://lists.jboss.org/mailman/listinfo/rules-users
13 years, 5 months
DrlParser with "Unknown error while parsing..."
by Wolfgang Laun
Trying to parse an absolutely correct DRL (a regular build succeeds)...
DrlParser parser = new DrlParser();
FileReader fr = new FileReader( "some.drl" );
// ... read file, create String
String drl = ...
PackageDescr pd = parser.parse( true, drl );
if( pd == null ){
System.out.println( "pd id null!" );
System.out.println( parser.getErrors() );
} else {
...
}
...and the error is:
pd id null!
[[-1,0]: Unknown error while parsing. This is a bug. Please contact the
Development team.]
?
-W
13 years, 6 months
Drools Flow in EJBs
by tizo
Hi there,
I have seen in chapter 6 of the documentation, that Drools Flow can be
configured to use JPA and transactions to persist the running states.
However, I am in a EJB where I obtain entity managers with a
@PersistenceContext annotation, and the transactions are managed by the
container, whereas in the example an EntityManagerFactory and a
TransactionManager are used.
Could I configure Flow in a direct way to be used by my EJB?
Thanks very much,
tizo
13 years, 6 months
Query about Drools
by sameer.bogawat
I have a project where I am allowing users to create rules from the
application UI. Currently all the rules related info is stored in a database
and the rules matching code is in Java. However this slows down the
application considerably and hence we are looking at using a third party
rules engine.
I have the following queries :
1. Is it possible to use the backend APIs (if any) to create/modify rules in
XML files in Drools on the fly i.e. at runtime ? We do not want to use the
Guvnor UI to create/modify rules.
2. We would be using a clustered environment , so is there any readymade
webservice which will update the rules at one location (from where the other
nodes can refer data).
Any help with the above queries would be of great help. Do let me know in
case you require extra information.
Thanks in Advance !
-Sameer
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13 years, 6 months
RuleBase serialization error in a cluster
by nir s
Hi,
We use drools in our application and store a compiled KnowledgeBase in
cache, all worked fine until we moved into cluster.
The stack trace:
2010-10-31 12:25:35,333 ERROR [] [org.jgroups.blocks.RpcDispatcher]
exception marshalling object
java.lang.ClassCastException:
org.jboss.serial.objectmetamodel.DataContainer$DataContainerDirectInput
cannot be cast to java.io.ObjectInputStream
at
org.drools.common.AbstractRuleBase.readExternal(AbstractRuleBase.java:232)
at
org.drools.reteoo.ReteooRuleBase.readExternal(ReteooRuleBase.java:179)
at
org.drools.impl.KnowledgeBaseImpl.readExternal(KnowledgeBaseImpl.java:87)
at
org.jboss.serial.persister.ExternalizePersister.readData(ExternalizePersister.java:72)
at
org.jboss.serial.objectmetamodel.ObjectDescriptorFactory.readObjectDescriptionFromStreaming(ObjectDescriptorFactory.java:412)
at
org.jboss.serial.objectmetamodel.ObjectDescriptorFactory.objectFromDescription(ObjectDescriptorFactory.java:82)
at
org.jboss.serial.objectmetamodel.DataContainer$DataContainerDirectInput.readObject(DataContainer.java:643)
at
org.jboss.serial.persister.RegularObjectPersister.readSlotWithFields(RegularObjectPersister.java:353)
at
org.jboss.serial.persister.RegularObjectPersister.defaultRead(RegularObjectPersister.java:273)
at
org.jboss.serial.persister.RegularObjectPersister.readData(RegularObjectPersister.java:241)
at
org.jboss.serial.objectmetamodel.ObjectDescriptorFactory.readObjectDescriptionFromStreaming(ObjectDescriptorFactory.java:412)
at
org.jboss.serial.objectmetamodel.ObjectDescriptorFactory.objectFromDescription(ObjectDescriptorFactory.java:82)
at
org.jboss.serial.objectmetamodel.DataContainer$DataContainerDirectInput.readObject(DataContainer.java:643)
at
org.jboss.serial.io.JBossObjectInputStreamSharedTree.readObjectOverride(JBossObjectInputStreamSharedTree.java:61)
at
org.jboss.cache.marshall.JBossObjectStreamFactory$JBossObjectInputStreamOverride.readObjectOverride(JBossObjectStreamFactory.java:33)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:345)
at
org.jboss.cache.marshall.TreeCacheMarshaller140.unmarshallObject(TreeCacheMarshaller140.java:432)
at
org.jboss.cache.marshall.TreeCacheMarshaller140.unmarshallMethodCall(TreeCacheMarshaller140.java:493)
at
org.jboss.cache.marshall.TreeCacheMarshaller140.unmarshallObject(TreeCacheMarshaller140.java:436)
at
org.jboss.cache.marshall.TreeCacheMarshaller140.unmarshallMethodCall(TreeCacheMarshaller140.java:493)
at
org.jboss.cache.marshall.TreeCacheMarshaller140.unmarshallObject(TreeCacheMarshaller140.java:436)
at
org.jboss.cache.marshall.TreeCacheMarshaller140.unmarshallObject(TreeCacheMarshaller140.java:405)
at
org.jboss.cache.marshall.TreeCacheMarshaller140.objectFromStream(TreeCacheMarshaller140.java:126)
at
org.jboss.cache.marshall.VersionAwareMarshaller.objectFromByteBuffer(VersionAwareMarshaller.java:167)
at org.jgroups.blocks.RpcDispatcher.handle(RpcDispatcher.java:254)
at
org.jgroups.blocks.RequestCorrelator.handleRequest(RequestCorrelator.java:654)
at
org.jgroups.blocks.RequestCorrelator.receiveMessage(RequestCorrelator.java:544)
at
org.jgroups.blocks.RequestCorrelator.receive(RequestCorrelator.java:367)
at
org.jgroups.blocks.MessageDispatcher$ProtocolAdapter.up(MessageDispatcher.java:777)
at org.jgroups.JChannel.up(JChannel.java:1091)
at org.jgroups.stack.ProtocolStack.up(ProtocolStack.java:382)
at
org.jgroups.stack.ProtocolStack.receiveUpEvent(ProtocolStack.java:398)
at org.jgroups.stack.Protocol.passUp(Protocol.java:520)
at
org.jgroups.protocols.pbcast.STREAMING_STATE_TRANSFER.up(STREAMING_STATE_TRANSFER.java:280)
at org.jgroups.stack.UpHandler.run(Protocol.java:60)
any idea?
BR,
Nir
13 years, 6 months
sliding window and explicit event expiration
by Samuli Saarinen
Hi,
Drools fusion documentation states that the engine calculates event
expires from rule constraints and uses the greater from the calculations
and @expires declaration. Do these calculations take sliding time
windows into account? E.g I hava event that sets @expires(1s) and a rule
that uses time window of 3s to detect 2 events in the given window.
Cheers,
Samuli
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13 years, 6 months
