Re: [rules-users] Declared Types and Globals in different files with incremental KnowledgeAgent
Op 20/09/2013 21:23, Davide Sottara schreef: Brecht, thanks for reporting this, but I don't think these are bugs. Thanks for the explanations. I tested it to be sure and it works as expected. The drools.agent.useKBaseClassLoaderForCompiling option indeed fixes the issue unless the agent detects several files at the same time in which case they are processed in alphabetical order (which is to be expected). In that case my preprocessing hack is still useful. The globals are just something different than what I expected globals to be. Thank you very much for the support. 1) In order to set the value of a global from a rule's RHS, you have to do somehting like this drools.getKnowledgeRuntime().setGlobal( RULES_MATCHED, newValue ); The reason is that the rule's RHS sees a reference to the original global... a local variable with the same name initialized appropriately. Something like RULES_MATCHED = 0 will only change the local reference, not modify the global. 2) The KnowledgeAgent supports declared types incrementally.. (Esteban and I spent a lot of time to make that work), but you have to set a flag in the KA's configuration: KnowledgeAgentConfiguration aconf = KnowledgeAgentFactory.newKnowledgeAgentConfiguration(); aconf.setProperty( drools.agent.useKBaseClassLoaderForCompiling, true ); The incremental mode (newInstance=false) only ensures that the existing KnowlegeBase is updated, tue useKBaseClassLoaderForCompiling will ALSO make sure that, as the new resources are compiled by a KnowledgeBuilder, this is initialized with the KB's classloader, which has the classes for the declared types. 3) I have proposed a fix for the issue you reported the other day... actually two in one. - 3a ) Runtime exceptions will be catched, - 3b ) you **WILL NOT** be able to use primitive types with globals anymore.. (which would result in a RTE anyway) Hope this help Best Davide On 09/20/2013 02:18 AM, De Rooms Brecht wrote: Dear Drools Users, I am building a network server for drools since the existing drools-server did not meet my requirements. Since I recently found a bug and find the people here very helpful I'll try to explain another issue I encountered in the hope that it improves drools 5.6 and 6.0. I noticed that declared types and globals don't seem to be found when you access them from a rule that was written in a different file. For the declared types I hacked around this issue by preprocessing the files and placing every declared type at the top of each file that needs it. For globals this is of course not possible. An example is shown below. File1 is loaded from the moment the agent starts up, then file2 is loaded. There is a difference when the knowledgeAgent detects the two files at once or one by one. In this case the KnowledgeAgent detects one file and then a few minutes later the other file and compiles them completely separately. The idea is to keep how many rules are matched of a certain type in a global. * FILE1: global_rules_matches.drl -- package ellipsoidfacts // declare global Integer RULES_MATCHED; // initialize global rule initRULESMATCHED salience 999 when then RULES_MATCHED = 0; end* * FILE2: testrule.drl -- package ellipsoidfacts rule Gesture_lefthook when // ... any precedent rules ... then System.out.println(matched gesture: lefthook+ RULES_MATCHED); end* In this particular case, my rule is not matched. I load these rules using a changeset xml, my knowledgeagent is set to incremental (but either doesnt work). The same happens when I declare types in FILE1 and use them in FILE2. When I write the type declaration in both files it works perfectly. Being the same package I assumed that these two scenarios should work. Am I doing something wrong or is the agent not supposed to work like this and should a package be in one file? Kind Regards, De Rooms Brecht ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users -- Brecht De Rooms = Phd Student Vrije Universiteit Brussel Research Group CISA(WISE) - DINF F.10.707 Department of Computer Science Pleinlaan 2 - 1050 Brussels - Belgium Tel. +32-2-629 1103 E-mail: bdero...@vub.ac.be Website http://wise.vub.ac.be/brecht-de-rooms = ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
[rules-users] Declared Types and Globals in different files with incremental KnowledgeAgent
Dear Drools Users, I am building a network server for drools since the existing drools-server did not meet my requirements. Since I recently found a bug and find the people here very helpful I'll try to explain another issue I encountered in the hope that it improves drools 5.6 and 6.0. I noticed that declared types and globals don't seem to be found when you access them from a rule that was written in a different file. For the declared types I hacked around this issue by preprocessing the files and placing every declared type at the top of each file that needs it. For globals this is of course not possible. An example is shown below. File1 is loaded from the moment the agent starts up, then file2 is loaded. There is a difference when the knowledgeAgent detects the two files at once or one by one. In this case the KnowledgeAgent detects one file and then a few minutes later the other file and compiles them completely separately. The idea is to keep how many rules are matched of a certain type in a global. * FILE1: global_rules_matches.drl -- package ellipsoidfacts // declare global Integer RULES_MATCHED; // initialize global rule initRULESMATCHED salience 999 when then RULES_MATCHED = 0; end* * FILE2: testrule.drl -- package ellipsoidfacts rule Gesture_lefthook when // ... any precedent rules ... then System.out.println(matched gesture: lefthook+ RULES_MATCHED); end* In this particular case, my rule is not matched. I load these rules using a changeset xml, my knowledgeagent is set to incremental (but either doesnt work). The same happens when I declare types in FILE1 and use them in FILE2. When I write the type declaration in both files it works perfectly. Being the same package I assumed that these two scenarios should work. Am I doing something wrong or is the agent not supposed to work like this and should a package be in one file? Kind Regards, De Rooms Brecht ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] No errors thrown from KnowledgeAgent
Dear Davide thank you very much for looking into this. I was wondering, are these kind of bugs also there in the commercial edition or is that a completely different implementation? Kind Regards, De Rooms Brecht Op 19/09/2013 10:46, Davide Sottara schreef: It is a bug, the KA can detect compilation errors in resources, but will not capture runtime exceptions. I have opened a ticket, It will be fixed in 5.6 and 6.x Davide On 09/17/2013 01:51 PM, De Rooms Brecht wrote: Dear Drools users, Apparently it was not caused by the previously mentioned fix. Sometimes I still had a KnowledgeAgent in my server that doesn't respond anymore which seems to be caused by a mistake in the DRL file. I started to investigate the source code of KnowledgeAgentImpl and KnowledgeBaseImpl and recompiled them to add some prints. Finally I tracked it until AbstractRuleBase.addPackages. There is a giant Try-final block and I noticed by adding prints that it stopped somewhere in the middle. When it does fail, my KnowledgeAgent stops working completely. The try-final seemed to be the only place for me where an exception might be ignored so I added a catch clause. As a result, the error report of my drl file was nicely printed and my agent didn't crash: *org.drools.RuntimeDroolsException: Unable to resolve class 'int' for global 'RULES_MATCHED' at org.drools.common.AbstractRuleBase.mergePackage(AbstractRuleBase.java:818) at org.drools.common.AbstractRuleBase.addPackages(AbstractRuleBase.java:615) at org.drools.reteoo.ReteooRuleBase.addPackages(ReteooRuleBase.java:472) at org.drools.impl.KnowledgeBaseImpl.addKnowledgePackages(KnowledgeBaseImpl.java:153) at org.drools.agent.impl.KnowledgeAgentImpl.addResourcesToKnowledgeBase(KnowledgeAgentImpl.java:1173) at org.drools.agent.impl.KnowledgeAgentImpl.incrementalBuildResources(KnowledgeAgentImpl.java:1058) at org.drools.agent.impl.KnowledgeAgentImpl.buildKnowledgeBase(KnowledgeAgentImpl.java:738) at org.drools.agent.impl.KnowledgeAgentImpl.applyChangeSet(KnowledgeAgentImpl.java:259) at org.drools.agent.impl.KnowledgeAgentImpl$ChangeSetNotificationDetector.run(KnowledgeAgentImpl.java:1357) at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471) at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334) at java.util.concurrent.FutureTask.run(FutureTask.java:166) at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471) at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334) at java.util.concurrent.FutureTask.run(FutureTask.java:166) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) at java.lang.Thread.run(Thread.java:722) * Maybe there is a reason for this missing catch so I am not sure whether I fixed it and broke something else ( eg. maybe I should undo a part of the operations before I continue). Is there anyone who knows this code and who can help me? Extra information: - I use Drools 5.5 from the Maven repository. - my agent configuration: agentConf.setProperty(drools.agent.newInstance, false); agentConf.setProperty(drools.agent.useKBaseClassLoaderForCompiling, true); Kind Regards, De Rooms Brecht Op 31/07/2013 14:45, De Rooms Brecht schreef: The bug was caused by one of the InputStreams that was not closed properly which caused the knowledgeAgent to block. I think my issues are solved now. Thanks for looking into this. Kind Regards, Op 31/07/2013 14:19, De Rooms Brecht schreef: Hello David and thanks for responding. I know it supports these event listeners and I use them. In my program, I have two knowledge agents and the first one (preprocessing) will read the file, preprocess a DRL and then write a second modified DRL file in a folder that is monitored by the second one. When I modify the original DRL file *(1.* in prints below*)* monitored by the preprocessing agent, everything works fine and the rule is triggered*(**2.)*. However, when I delete a file *(**3.)*, the knowledgeAgent just blocks after AfterChangeSetAppliedEvent and does not do anything anymore.. If I send new data in the knowledgeAgent it does not react anymore. I would expect to get a stacktrace of what went wrong but I do not get any info besides of the systemeventlistener or knowledgeagentlistener. Is there any way I can get a stacktrace? Kind Regards, De Rooms Brecht _*1. Resources Changed = Modified: [[FileResource file='knowledge\realtimeKnowledge\test.brules.testRule.drl']]*_ /eventListener 1::: ==[BeforeResourceProcessedEvent(RESOURCE_REMOVED): [FileResource file='knowledge\realtimeKnowledge\test.brules.testRule.drl']]// //eventListener 1::: ==[AfterResourceProcessedEvent(RESOURCE_REMOVED): [FileResource file='knowledge\realtimeKnowledge\test.brules.testRule.drl
Re: [rules-users] No errors thrown from KnowledgeAgent
Dear Drools users,
Apparently it was not caused by the previously mentioned fix. Sometimes
I still had a KnowledgeAgent in my server that doesn't respond anymore
which seems to be caused by a mistake in the DRL file.
I started to investigate the source code of KnowledgeAgentImpl and
KnowledgeBaseImpl and recompiled them to add some prints. Finally I
tracked it until AbstractRuleBase.addPackages.
There is a giant Try-final block and I noticed by adding prints that it
stopped somewhere in the middle. When it does fail, my KnowledgeAgent
stops working completely.
The try-final seemed to be the only place for me where an exception
might be ignored so I added a catch clause.
As a result, the error report of my drl file was nicely printed and my
agent didn't crash:
*org.drools.RuntimeDroolsException: Unable to resolve class 'int' for
global 'RULES_MATCHED'
at
org.drools.common.AbstractRuleBase.mergePackage(AbstractRuleBase.java:818)
at
org.drools.common.AbstractRuleBase.addPackages(AbstractRuleBase.java:615)
at
org.drools.reteoo.ReteooRuleBase.addPackages(ReteooRuleBase.java:472)
at
org.drools.impl.KnowledgeBaseImpl.addKnowledgePackages(KnowledgeBaseImpl.java:153)
at
org.drools.agent.impl.KnowledgeAgentImpl.addResourcesToKnowledgeBase(KnowledgeAgentImpl.java:1173)
at
org.drools.agent.impl.KnowledgeAgentImpl.incrementalBuildResources(KnowledgeAgentImpl.java:1058)
at
org.drools.agent.impl.KnowledgeAgentImpl.buildKnowledgeBase(KnowledgeAgentImpl.java:738)
at
org.drools.agent.impl.KnowledgeAgentImpl.applyChangeSet(KnowledgeAgentImpl.java:259)
at
org.drools.agent.impl.KnowledgeAgentImpl$ChangeSetNotificationDetector.run(KnowledgeAgentImpl.java:1357)
at
java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
at java.util.concurrent.FutureTask.run(FutureTask.java:166)
at
java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
at java.util.concurrent.FutureTask.run(FutureTask.java:166)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:722)
*
Maybe there is a reason for this missing catch so I am not sure whether
I fixed it and broke something else ( eg. maybe I should undo a part of
the operations before I continue).
Is there anyone who knows this code and who can help me?
Extra information:
- I use Drools 5.5 from the Maven repository.
- my agent configuration:
agentConf.setProperty(drools.agent.newInstance, false);
agentConf.setProperty(drools.agent.useKBaseClassLoaderForCompiling,
true);
Kind Regards,
De Rooms Brecht
Op 31/07/2013 14:45, De Rooms Brecht schreef:
The bug was caused by one of the InputStreams that was not closed
properly which caused the knowledgeAgent to block.
I think my issues are solved now.
Thanks for looking into this.
Kind Regards,
Op 31/07/2013 14:19, De Rooms Brecht schreef:
Hello David and thanks for responding.
I know it supports these event listeners and I use them. In my
program, I have two knowledge agents and the first one
(preprocessing) will read the file, preprocess a DRL and then write a
second modified DRL file in a folder that is monitored by the second
one. When I modify the original DRL file *(1.* in prints below*)*
monitored by the preprocessing agent, everything works fine and the
rule is triggered*(**2.)*. However, when I delete a file *(**3.)*,
the knowledgeAgent just blocks after AfterChangeSetAppliedEvent and
does not do anything anymore.. If I send new data in the
knowledgeAgent it does not react anymore.
I would expect to get a stacktrace of what went wrong but I do not
get any info besides of the systemeventlistener or
knowledgeagentlistener. Is there any way I can get a stacktrace?
Kind Regards,
De Rooms Brecht
_*1. Resources Changed = Modified: [[FileResource
file='knowledge\realtimeKnowledge\test.brules.testRule.drl']]*_
/eventListener 1:::
==[BeforeResourceProcessedEvent(RESOURCE_REMOVED): [FileResource
file='knowledge\realtimeKnowledge\test.brules.testRule.drl']]//
//eventListener 1:::
==[AfterResourceProcessedEvent(RESOURCE_REMOVED): [FileResource
file='knowledge\realtimeKnowledge\test.brules.testRule.drl']]//
//eventListener 1::: ==[AfterChangeSetProcessedEvent:
ChangeSetImpl{resourcesRemoved=[], resourcesAdded=[],
resourcesModified=[[FileResource
file='knowledge\realtimeKnowledge\test.brules.testRule.drl']],
knowledgeDefinitionsRemoved=[]}]//
//eventListener 1::: ==[ResourceCompilationFailedEvent:
org.drools.builder.impl.KnowledgeBuilderImpl@70d0d127]//
//eventListener 1::: ==[KnowledgeBaseUpdatedEvent:
org.drools.impl.KnowledgeBaseImpl@49669be
Re: [rules-users] No errors thrown from KnowledgeAgent
Hello David and thanks for responding.
I know it supports these event listeners and I use them. In my program,
I have two knowledge agents and the first one (preprocessing) will read
the file, preprocess a DRL and then write a second modified DRL file in
a folder that is monitored by the second one. When I modify the original
DRL file *(1.* in prints below*)* monitored by the preprocessing agent,
everything works fine and the rule is triggered*(**2.)*. However, when I
delete a file *(**3.)*, the knowledgeAgent just blocks after
AfterChangeSetAppliedEvent and does not do anything anymore.. If I send
new data in the knowledgeAgent it does not react anymore.
I would expect to get a stacktrace of what went wrong but I do not get
any info besides of the systemeventlistener or knowledgeagentlistener.
Is there any way I can get a stacktrace?
Kind Regards,
De Rooms Brecht
_*1. Resources Changed = Modified: [[FileResource
file='knowledge\realtimeKnowledge\test.brules.testRule.drl']]*_
/eventListener 1:::
==[BeforeResourceProcessedEvent(RESOURCE_REMOVED): [FileResource
file='knowledge\realtimeKnowledge\test.brules.testRule.drl']]//
//eventListener 1:::
==[AfterResourceProcessedEvent(RESOURCE_REMOVED): [FileResource
file='knowledge\realtimeKnowledge\test.brules.testRule.drl']]//
//eventListener 1::: ==[AfterChangeSetProcessedEvent:
ChangeSetImpl{resourcesRemoved=[], resourcesAdded=[],
resourcesModified=[[FileResource
file='knowledge\realtimeKnowledge\test.brules.testRule.drl']],
knowledgeDefinitionsRemoved=[]}]//
//eventListener 1::: ==[ResourceCompilationFailedEvent:
org.drools.builder.impl.KnowledgeBuilderImpl@70d0d127]//
//eventListener 1::: ==[KnowledgeBaseUpdatedEvent:
org.drools.impl.KnowledgeBaseImpl@49669be]//
//eventListener 1::: ==[AfterChangeSetAppliedEvent:
ChangeSetImpl{resourcesRemoved=[], resourcesAdded=[],
resourcesModified=[[FileResource
file='knowledge\realtimeKnowledge\test.brules.testRule.drl']],
knowledgeDefinitionsRemoved=[]}]//
//eventListener 2::: ==[BeforeChangeSetAppliedEvent:
ChangeSetImpl{resourcesRemoved=[], resourcesAdded=[],
resourcesModified=[[FileResource
file='knowledge\packaged\test.brules.testRule.drl']],
knowledgeDefinitionsRemoved=[]}]//
//eventListener 2:::
==[BeforeResourceProcessedEvent(RESOURCE_REMOVED): [FileResource
file='knowledge\packaged\test.brules.testRule.drl']]//
//eventListener 2:::
==[AfterResourceProcessedEvent(RESOURCE_REMOVED): [FileResource
file='knowledge\packaged\test.brules.testRule.drl']]//
//eventListener 2::: ==[AfterChangeSetProcessedEvent:
ChangeSetImpl{resourcesRemoved=[], resourcesAdded=[],
resourcesModified=[[FileResource
file='knowledge\packaged\test.brules.testRule.drl']],
knowledgeDefinitionsRemoved=[]}]//
//eventListener 2::: ==[KnowledgeBaseUpdatedEvent:
org.drools.impl.KnowledgeBaseImpl@11c834d1]/
_*2. Rules are triggered when the PKG file its knowledge is updated:*_
/Changed This Rule::: Got Event: TestEvent( number=5,
message=doesDynamicEventTypeWork? )//
//Changed This Rule::: Got Event: TestEvent( number=4,
message=doesDynamicEventTypeWork? )//
//Changed This Rule::: Got Event: TestEvent( number=2,
message=doesDynamicEventTypeWork? )//
//Changed This Rule::: Got Event: TestEvent( number=1,
message=doesDynamicEventTypeWork? )//
//Changed This Rule::: Got Event: TestEvent( number=2,
message=doesDynamicEventTypeWork? )//
//Changed This Rule::: Got Event: TestEvent( number=1,
message=doesDynamicEventTypeWork? )//
//Changed This Rule::: Got Event: TestEvent( number=2,
message=doesDynamicEventTypeWork? )//
//Changed This Rule::: Got Event: TestEvent( number=1,
message=doesDynamicEventTypeWork? )//
//
//eventListener 2::: ==[AfterChangeSetAppliedEvent:
ChangeSetImpl{resourcesRemoved=[], resourcesAdded=[],
resourcesModified=[[FileResource
file='knowledge\packaged\test.brules.testRule.drl']],
knowledgeDefinitionsRemoved=[]}]//
//eventListener 1::: ==[BeforeChangeSetAppliedEvent:
ChangeSetImpl{resourcesRemoved=[[FileResource
file='knowledge\realtimeKnowledge\test.brules.testRule.drl']],
resourcesAdded=[], resourcesModified=[],
knowledgeDefinitionsRemoved=[]}]//
//eventListener 1::: ==[BeforeChangeSetProcessedEvent:
ChangeSetImpl{resourcesRemoved=[[FileResource
file='knowledge\realtimeKnowledge\test.brules.testRule.drl']],
resourcesAdded=[], resourcesModified=[], knowledgeDefinitionsRemoved=[]}]/
_*3. *__*Resources Changed = *__*Removed: [[FileResource
file='knowledge\realtimeKnowledge\test.brules.testRule.drl']]*_
/eventListener 1:::
==[BeforeResourceProcessedEvent(RESOURCE_MODIFIED): [FileResource
file='knowledge\realtimeKnowledge\test.brules.testRule.drl']]//
//eventListener 1:::
==[AfterResourceProcessedEvent(RESOURCE_MODIFIED): [FileResource
file='knowledge\realtimeKnowledge\test.brules.testRule.drl']]//
//eventListener 1::: ==[AfterChangeSetProcessedEvent
Re: [rules-users] No errors thrown from KnowledgeAgent
The bug was caused by one of the InputStreams that was not closed
properly which caused the knowledgeAgent to block.
I think my issues are solved now.
Thanks for looking into this.
Kind Regards,
Op 31/07/2013 14:19, De Rooms Brecht schreef:
Hello David and thanks for responding.
I know it supports these event listeners and I use them. In my
program, I have two knowledge agents and the first one (preprocessing)
will read the file, preprocess a DRL and then write a second modified
DRL file in a folder that is monitored by the second one. When I
modify the original DRL file *(1.* in prints below*)* monitored by the
preprocessing agent, everything works fine and the rule is
triggered*(**2.)*. However, when I delete a file *(**3.)*, the
knowledgeAgent just blocks after AfterChangeSetAppliedEvent and does
not do anything anymore.. If I send new data in the knowledgeAgent it
does not react anymore.
I would expect to get a stacktrace of what went wrong but I do not get
any info besides of the systemeventlistener or knowledgeagentlistener.
Is there any way I can get a stacktrace?
Kind Regards,
De Rooms Brecht
_*1. Resources Changed = Modified: [[FileResource
file='knowledge\realtimeKnowledge\test.brules.testRule.drl']]*_
/eventListener 1:::
==[BeforeResourceProcessedEvent(RESOURCE_REMOVED): [FileResource
file='knowledge\realtimeKnowledge\test.brules.testRule.drl']]//
//eventListener 1:::
==[AfterResourceProcessedEvent(RESOURCE_REMOVED): [FileResource
file='knowledge\realtimeKnowledge\test.brules.testRule.drl']]//
//eventListener 1::: ==[AfterChangeSetProcessedEvent:
ChangeSetImpl{resourcesRemoved=[], resourcesAdded=[],
resourcesModified=[[FileResource
file='knowledge\realtimeKnowledge\test.brules.testRule.drl']],
knowledgeDefinitionsRemoved=[]}]//
//eventListener 1::: ==[ResourceCompilationFailedEvent:
org.drools.builder.impl.KnowledgeBuilderImpl@70d0d127]//
//eventListener 1::: ==[KnowledgeBaseUpdatedEvent:
org.drools.impl.KnowledgeBaseImpl@49669be]//
//eventListener 1::: ==[AfterChangeSetAppliedEvent:
ChangeSetImpl{resourcesRemoved=[], resourcesAdded=[],
resourcesModified=[[FileResource
file='knowledge\realtimeKnowledge\test.brules.testRule.drl']],
knowledgeDefinitionsRemoved=[]}]//
//eventListener 2::: ==[BeforeChangeSetAppliedEvent:
ChangeSetImpl{resourcesRemoved=[], resourcesAdded=[],
resourcesModified=[[FileResource
file='knowledge\packaged\test.brules.testRule.drl']],
knowledgeDefinitionsRemoved=[]}]//
//eventListener 2:::
==[BeforeResourceProcessedEvent(RESOURCE_REMOVED): [FileResource
file='knowledge\packaged\test.brules.testRule.drl']]//
//eventListener 2:::
==[AfterResourceProcessedEvent(RESOURCE_REMOVED): [FileResource
file='knowledge\packaged\test.brules.testRule.drl']]//
//eventListener 2::: ==[AfterChangeSetProcessedEvent:
ChangeSetImpl{resourcesRemoved=[], resourcesAdded=[],
resourcesModified=[[FileResource
file='knowledge\packaged\test.brules.testRule.drl']],
knowledgeDefinitionsRemoved=[]}]//
//eventListener 2::: ==[KnowledgeBaseUpdatedEvent:
org.drools.impl.KnowledgeBaseImpl@11c834d1]/
_*2. Rules are triggered when the PKG file its knowledge is updated:*_
/Changed This Rule::: Got Event: TestEvent( number=5,
message=doesDynamicEventTypeWork? )//
//Changed This Rule::: Got Event: TestEvent( number=4,
message=doesDynamicEventTypeWork? )//
//Changed This Rule::: Got Event: TestEvent( number=2,
message=doesDynamicEventTypeWork? )//
//Changed This Rule::: Got Event: TestEvent( number=1,
message=doesDynamicEventTypeWork? )//
//Changed This Rule::: Got Event: TestEvent( number=2,
message=doesDynamicEventTypeWork? )//
//Changed This Rule::: Got Event: TestEvent( number=1,
message=doesDynamicEventTypeWork? )//
//Changed This Rule::: Got Event: TestEvent( number=2,
message=doesDynamicEventTypeWork? )//
//Changed This Rule::: Got Event: TestEvent( number=1,
message=doesDynamicEventTypeWork? )//
//
//eventListener 2::: ==[AfterChangeSetAppliedEvent:
ChangeSetImpl{resourcesRemoved=[], resourcesAdded=[],
resourcesModified=[[FileResource
file='knowledge\packaged\test.brules.testRule.drl']],
knowledgeDefinitionsRemoved=[]}]//
//eventListener 1::: ==[BeforeChangeSetAppliedEvent:
ChangeSetImpl{resourcesRemoved=[[FileResource
file='knowledge\realtimeKnowledge\test.brules.testRule.drl']],
resourcesAdded=[], resourcesModified=[],
knowledgeDefinitionsRemoved=[]}]//
//eventListener 1::: ==[BeforeChangeSetProcessedEvent:
ChangeSetImpl{resourcesRemoved=[[FileResource
file='knowledge\realtimeKnowledge\test.brules.testRule.drl']],
resourcesAdded=[], resourcesModified=[], knowledgeDefinitionsRemoved=[]}]/
_*3. *__*Resources Changed = *__*Removed: [[FileResource
file='knowledge\realtimeKnowledge\test.brules.testRule.drl']]*_
/eventListener 1:::
==[BeforeResourceProcessedEvent(RESOURCE_MODIFIED): [FileResource
file='knowledge
Re: [rules-users] uninformative rule parsing/compiling error - org.drools.rule.Rule cannot be cast to org.drools.rule.Query
Op 24/07/2013 14:24, Davide Sottara schreef:
Two clarifications first:
1) Which version are you using?
I am using version 5.5
2) Is TrackerUpdate a static class inside TrackerRemote?
In case, could you post the exact import statements you are using?
the TrackerUpdate is not static, but it's a class defined within the
TrackerUpdate class.
/public class TrackerRemote
public class TrackerUpdate {
public java.util.Date msg_time;
public int sensor;
public double[] pos;
public double[] quat;
public TrackerUpdate() { /* compiled code */ }
}/
The full imports and rule is:
package derooms.be.testRule
import derooms.be.server.predefinedtypes.Event;
import derooms.be.test.Message;
import vrpn.TrackerRemote;
/
rule TrackerRemote.TrackerUpdate
when
message:TrackerRemote.TrackerUpdate()
then
System.out.println(Tracker: + message);
end/
Sorry that I didn't sent it earlier, I actually sent this e-mail already
but it didn't came through.
B
Thanks
Davide
On 07/24/2013 02:14 PM, De Rooms Brecht wrote:
Dear rules users,
I am currently writing my own Drools-server since I wanted more
control than the drools-execution server (and it never worked very
well here) where I can send rules/facts over JMS/AQMP/STOMP. Rules
which are sent are saved on the server-side in DRL files that are
monitored. That way, I can debug easily by changing the sent files.
However, when I sent the following code, the agent does not provide
me with an error message at all and hangs:
/
//rule TrackerRemote.TrackerUpdate//
//when//
//message:TrackerRemote.TrackerUpdate()//
//then//
//System.out.println(Tracker: + message);//
//end/
at first I thought it was because TrackerRemote.TrackerUpdate is not
in that package anymore and thus unknown so I tried to send the rule
listed below which gives me the nice and expected error:
Unable to resolve ObjectType 'NotExistingType' : [Rule name='Foo']
/rule Foo//
//when //
//NotExistingType( bloe == test)//
//then//
//System.out.println(this should not work);//
//end/
when I compile the rule myself with a KnowledgeBuilder:
KnowledgeBuilder kbuilder =
KnowledgeBuilderFactory.newKnowledgeBuilder();
InputStream is = new ByteArrayInputStream(drlstring.getBytes());
kbuilder.add(
ResourceFactory.newInputStreamResource(is),ResourceType.DRL );
I receive the error:
org.drools.rule.Rule cannot be cast to org.drools.rule.Query
which I think doesn't tell me anything about the mistake I made in my
rule, is this a Drools bug and should I post this somewhere?
Kind Regards,
De Rooms Brecht
Full Stack:
java.lang.ClassCastException: org.drools.rule.Rule cannot be cast to
org.drools.rule.Query
at
org.drools.rule.builder.PatternBuilder.build(PatternBuilder.java:175)
at
org.drools.rule.builder.PatternBuilder.build(PatternBuilder.java:118)
at
org.drools.rule.builder.GroupElementBuilder.build(GroupElementBuilder.java:67)
at org.drools.rule.builder.RuleBuilder.build(RuleBuilder.java:84)
at
org.drools.compiler.PackageBuilder.addRule(PackageBuilder.java:2706)
at
org.drools.compiler.PackageBuilder.compileRules(PackageBuilder.java:930)
at
org.drools.compiler.PackageBuilder.compileAllRules(PackageBuilder.java:839)
at
org.drools.compiler.PackageBuilder.addPackage(PackageBuilder.java:831)
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
derooms.be.server.listeners.RulesListener.processMessage(RulesListener.java:33)
at
derooms.be.server.listeners.AbstractListener.onMessage(AbstractListener.java:35)
at
org.apache.activemq.ActiveMQMessageConsumer.dispatch(ActiveMQMessageConsumer.java:1321)
at
org.apache.activemq.ActiveMQSessionExecutor.dispatch(ActiveMQSessionExecutor.java:131)
at
org.apache.activemq.ActiveMQSessionExecutor.iterate(ActiveMQSessionExecutor.java:202)
at
org.apache.activemq.thread.PooledTaskRunner.runTask(PooledTaskRunner.java:129)
at
org.apache.activemq.thread.PooledTaskRunner$1.run(PooledTaskRunner.java:47)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:722)
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rules-users
[rules-users] No errors thrown from KnowledgeAgent
Dear Drools users, I have been testing with the KnowledgeAgent from version 5.4 and 5.5. It monitors a changeset and is set to incrementally build the knowledgebase. I noticed that it sometimes crashes but never throws out errors. This happens for example when I define a type two times and when I remove a file. Does anyone experience similar behaviour and has an idea of how I could see the errors? I already tried to check the errors by building it myself using a knowledgebuilder before I update the file that the knowledgeAgent monitors but that's quite a dirty solution. Kind Regards, De Rooms Brecht ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] uninformative rule parsing/compiling error - org.drools.rule.Rule cannot be cast to org.drools.rule.Query
Op 24/07/2013 14:24, Davide Sottara schreef:
Two clarifications first:
1) Which version are you using?
Version 5.4.0.Final
2) Is TrackerUpdate a static class inside TrackerRemote?
In case, could you post the exact import statements you are using?
It is a normal class inside TrackerRemote.
public class TrackerRemote extends vrpn.VRPNDevice implements
java.lang.Runnable {
public class TrackerUpdate {...
I imported:
import vrpn.TrackerRemote;
and used it as follows:
rule TrackerRemote.TrackerUpdate
when
message:TrackerRemote.TrackerUpdate()
then
System.out.println(Tracker: + message);
end
Extra information:
I have been trying to add type declarations in one file and import them
in another and I get exactly the same error message. There I did this:
package derooms.be.testRule
declare TestEvent
@typesafe(false)
number : int
message : String
end
and then a rule:
package derooms.be.testRule
rule TestEvent
when
event:TestEvent(message == doesDynamicEventTypeWork?)
then
System.out.println(Got Event: + event.data);
end
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[rules-users] uninformative rule parsing/compiling error - org.drools.rule.Rule cannot be cast to org.drools.rule.Query
Dear rules users, I am currently writing my own Drools-server since I wanted more control than the drools-execution server (and it never worked very well here) where I can send rules/facts over JMS/AQMP/STOMP. Rules which are sent are saved on the server-side in DRL files that are monitored. That way, I can debug easily by changing the sent files. However, when I sent the following code, the agent does not provide me with an error message at all and hangs: / //rule TrackerRemote.TrackerUpdate// //when// //message:TrackerRemote.TrackerUpdate()// //then// //System.out.println(Tracker: + message);// //end/ at first I thought it was because TrackerRemote.TrackerUpdate is not in that package anymore and thus unknown so I tried to send the rule listed below which gives me the nice and expected error: Unable to resolve ObjectType 'NotExistingType' : [Rule name='Foo'] /rule Foo// //when // //NotExistingType( bloe == test)// //then// //System.out.println(this should not work);// //end/ when I compile the rule myself with a KnowledgeBuilder: KnowledgeBuilder kbuilder = KnowledgeBuilderFactory.newKnowledgeBuilder(); InputStream is = new ByteArrayInputStream(drlstring.getBytes()); kbuilder.add( ResourceFactory.newInputStreamResource(is),ResourceType.DRL ); I receive the error: org.drools.rule.Rule cannot be cast to org.drools.rule.Query which I think doesn't tell me anything about the mistake I made in my rule, is this a Drools bug and should I post this somewhere? Kind Regards, De Rooms Brecht Full Stack: java.lang.ClassCastException: org.drools.rule.Rule cannot be cast to org.drools.rule.Query at org.drools.rule.builder.PatternBuilder.build(PatternBuilder.java:175) at org.drools.rule.builder.PatternBuilder.build(PatternBuilder.java:118) at org.drools.rule.builder.GroupElementBuilder.build(GroupElementBuilder.java:67) at org.drools.rule.builder.RuleBuilder.build(RuleBuilder.java:84) at org.drools.compiler.PackageBuilder.addRule(PackageBuilder.java:2706) at org.drools.compiler.PackageBuilder.compileRules(PackageBuilder.java:930) at org.drools.compiler.PackageBuilder.compileAllRules(PackageBuilder.java:839) at org.drools.compiler.PackageBuilder.addPackage(PackageBuilder.java:831) 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 derooms.be.server.listeners.RulesListener.processMessage(RulesListener.java:33) at derooms.be.server.listeners.AbstractListener.onMessage(AbstractListener.java:35) at org.apache.activemq.ActiveMQMessageConsumer.dispatch(ActiveMQMessageConsumer.java:1321) at org.apache.activemq.ActiveMQSessionExecutor.dispatch(ActiveMQSessionExecutor.java:131) at org.apache.activemq.ActiveMQSessionExecutor.iterate(ActiveMQSessionExecutor.java:202) at org.apache.activemq.thread.PooledTaskRunner.runTask(PooledTaskRunner.java:129) at org.apache.activemq.thread.PooledTaskRunner$1.run(PooledTaskRunner.java:47) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) at java.lang.Thread.run(Thread.java:722) ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
