September 2011 - jboss-jira - Jboss List Archives

[JBoss JIRA] Created: (JBRULES-3139) NPE in KnowledgeAgentImpl due to missing change set

by Wolfgang Laun (JIRA)

NPE in KnowledgeAgentImpl due to missing change set --------------------------------------------------- Key: JBRULES-3139 URL: https://issues.jboss.org/browse/JBRULES-3139 Project: Drools Issue Type: Bug Security Level: Public (Everyone can see) Components: drools-core (expert) Reporter: Wolfgang Laun Assignee: Mark Proctor A missing Change Set causes a NPE in KnowledgeAgentImpl. import java.net.URL; import org.drools.*; import org.drools.agent.*; import org.drools.conf.*; import org.drools.builder.*; import org.drools.io.*; public void setup() throws Exception { KnowledgeBaseConfiguration kBaseConfig = KnowledgeBaseFactory.newKnowledgeBaseConfiguration(); kBaseConfig.setOption(EventProcessingOption.STREAM); // kBaseConfig.setOption( cehOption ); ResourceChangeScannerConfiguration rcsConf = ResourceFactory.getResourceChangeScannerService() .newResourceChangeScannerConfiguration(); rcsConf.setProperty("drools.resource.scanner.interval", "20"); ResourceFactory.getResourceChangeScannerService().configure( rcsConf ); KnowledgeAgentConfiguration kaConf = KnowledgeAgentFactory.newKnowledgeAgentConfiguration(); kaConf.setProperty("drools.agent.scanDirectories", "true"); kaConf.setProperty("drools.agent.scanResources", "true"); kaConf.setProperty("drools.agent.newInstance", "false"); KnowledgeBase kBase = KnowledgeBaseFactory.newKnowledgeBase(kBaseConfig); KnowledgeAgent kAgent = KnowledgeAgentFactory.newKnowledgeAgent( "drools agent", kBase, kaConf); String urlString = "file://tmp/MissingChangeSet.xml"; try { URL url = new URL(urlString); Resource urlResource = ResourceFactory.newUrlResource(url); if( urlResource != null ){ System.out.println( "Resource " + urlResource ); } kAgent.applyChangeSet( urlResource ); } catch (Exception e) { System.out.println("Caught exception: " + e.getMessage()); e.printStackTrace(); } } Caught exception: null java.lang.NullPointerException at org.drools.agent.impl.KnowledgeAgentImpl.processChangeSet(KnowledgeAgentImpl.java:223) at org.drools.agent.impl.KnowledgeAgentImpl.applyChangeSet(KnowledgeAgentImpl.java:189) at org.drools.agent.impl.KnowledgeAgentImpl.applyChangeSet(KnowledgeAgentImpl.java:174) at hashcode.Main.setup(Main.java:75) -- This message is automatically generated by JIRA. For more information on JIRA, see: http://www.atlassian.com/software/jira

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[JBoss JIRA] Created: (JBRULES-2801) Entry-point defaults for type, rule, package

by Wolfgang Laun (JIRA)

Entry-point defaults for type, rule, package -------------------------------------------- Key: JBRULES-2801 URL: https://jira.jboss.org/browse/JBRULES-2801 Project: Drools Issue Type: Feature Request Security Level: Public (Everyone can see) Reporter: Wolfgang Laun Assignee: Mark Proctor Implement the definition of the default entry point for an Event or Fact type via a metadata attribute, e.g.: declare X @role( event ) @entry-point( y ) end so that this a) declares the entry-point in the KnowledgeBase (the same way from entry-point "x" does) b) removes the need to use from entry-point with all patterns referring to X c) would still let me override the entry point with a "from entry-point" clause. The same attribute can be used inside a rule, where it is associated with all fact patterns without an explicit entry point. Here it also overrides an entry-point declared with the type's declare, if any. Since all rule attributes may also be used at package level (outside rules), this includes the new entry-point attribute. It will then be honoured in rules according to the current strategy for all other rule attributes. -- This message is automatically generated by JIRA. - For more information on JIRA, see: http://www.atlassian.com/software/jira

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[JBoss JIRA] Created: (JBRULES-3001) Free form expression constraints: unexpected execution result; unexpected failure to compile

by Wolfgang Laun (JIRA)

Free form expression constraints: unexpected execution result; unexpected failure to compile --------------------------------------------------------------------------------------------- Key: JBRULES-3001 URL: https://issues.jboss.org/browse/JBRULES-3001 Project: Drools Issue Type: Bug Security Level: Public (Everyone can see) Components: drools-compiler (expert) Affects Versions: 5.2.0.CR1 Reporter: Wolfgang Laun Assignee: Mark Proctor Given public class Customer { int custid; //... } The following rule always fires, for any value of custid. rule "articles of a customer" when $c: Customer( 150 <= custid <= 250 ) returns true then System.out.println( "Customer1 " + $c.getCustid() ); end But the constraint $c: Customer( 100 <= custid ) is refused by the compiler: Unable to build constraint as '100' is invalid : [Rule name='articles of a customer'] -- This message is automatically generated by JIRA. For more information on JIRA, see: http://www.atlassian.com/software/jira

13 years

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[JBoss JIRA] Created: (JBRULES-2983) IooB exception when using positional notation on pojo fact

by Wolfgang Laun (JIRA)

IooB exception when using positional notation on pojo fact ---------------------------------------------------------- Key: JBRULES-2983 URL: https://issues.jboss.org/browse/JBRULES-2983 Project: Drools Issue Type: Bug Security Level: Public (Everyone can see) Components: drools-compiler (expert) Affects Versions: 5.2.0.CR1 Reporter: Wolfgang Laun Assignee: Mark Proctor If Sale is a Java class containing int custid and int amount, the following pattern crashes the builder: query bigSales ( int $custid, int $limit ) $s: Sale( $custid; amount >= $limit ) end -- This message is automatically generated by JIRA. For more information on JIRA, see: http://www.atlassian.com/software/jira

13 years

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[JBoss JIRA] Created: (JBRULES-2986) Confusing error reporting due to incomplete constraint

by Wolfgang Laun (JIRA)

Confusing error reporting due to incomplete constraint ------------------------------------------------------ Key: JBRULES-2986 URL: https://issues.jboss.org/browse/JBRULES-2986 Project: Drools Issue Type: Bug Security Level: Public (Everyone can see) Components: drools-compiler (expert) Affects Versions: 5.2.0.CR1 Reporter: Wolfgang Laun Assignee: Mark Proctor declare Article artid : int; artname : String; custid : int; end declare Customer custid : int end rule "articles of a customer" when $c: Customer( $custid: custid ) $a: Article( $artid, artname == ("mou" + "se"), $custid : custid == $custid ) then end Produces many error messages (see below), where line number 1 and column numnber 1 are incorrect. Expect: only one error message, with correct line number. ==================================================================== Unable to Analyse Expression $artid: [Error: Failed to compile: 2 compilation error(s): - (1,1) unable to resolve method using strict-mode: ex50.Article.$artid() - (1,1) unqualified type in strict mode for: $artid] [Near : {... $artid ....}] ^ [Line: 1, Column: 1] : [Rule name='articles of a customer'] Rule Compilation error : [Rule name='articles of a customer'] ex50/Rule_articles_of_a_customer_0.java (14:690) : $artid cannot be resolved ==================================================================== -- This message is automatically generated by JIRA. For more information on JIRA, see: http://www.atlassian.com/software/jira

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[JBoss JIRA] Created: (JBRULES-2987) Literal expression not possible in constraint

by Wolfgang Laun (JIRA)

Literal expression not possible in constraint --------------------------------------------- Key: JBRULES-2987 URL: https://issues.jboss.org/browse/JBRULES-2987 Project: Drools Issue Type: Bug Security Level: Public (Everyone can see) Components: drools-compiler (expert) Affects Versions: 3.0-beta3 Reporter: Wolfgang Laun Assignee: Mark Proctor declare Article artid : int; artname : String; custid : int; end declare Customer custid : int endrule "articles of a customer" when $c: Customer( $custid: custid ) $a: Article( $artid: artid, artname == "mou" + "se", $custid : custid == $custid ) then end This produces the (misleading) error message below, but should work according to Mark Proctor. Notice that artname == ("mou" + "se") works correctly. Unable to return Declaration for identifier '"mou" + "se"' : [Rule name='articles of a customer'] -- This message is automatically generated by JIRA. For more information on JIRA, see: http://www.atlassian.com/software/jira

13 years

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[JBoss JIRA] Created: (JBRULES-2878) NPE due to session.update with 1 or 2 invalid operands

by Wolfgang Laun (JIRA)

NPE due to session.update with 1 or 2 invalid operands ------------------------------------------------------ Key: JBRULES-2878 URL: https://issues.jboss.org/browse/JBRULES-2878 Project: Drools Issue Type: Bug Security Level: Public (Everyone can see) Components: drools-core Affects Versions: 5.1.1.FINAL Reporter: Wolfgang Laun Assignee: Mark Proctor Counter counter = new Counter( initial ); this.session.insert( counter ); And now each of these calls session.update( session.getFactHandle( null ), null ); session.update( session.getFactHandle( counter ), null ); session.update( session.getFactHandle( null ), counter ); results in a NPE Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException at org.drools.common.ObjectTypeConfigurationRegistry.getObjectTypeConf(ObjectTypeConfigurationRegistry.java:58) at org.drools.common.NamedEntryPoint.update(NamedEntryPoint.java:382) at org.drools.common.AbstractWorkingMemory.update(AbstractWorkingMemory.java:981) at org.drools.common.AbstractWorkingMemory.update(AbstractWorkingMemory.java:954) at org.drools.impl.StatefulKnowledgeSessionImpl.update(StatefulKnowledgeSessionImpl.java:266) -- This message is automatically generated by JIRA. - For more information on JIRA, see: http://www.atlassian.com/software/jira

13 years

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[JBoss JIRA] Created: (JBRULES-3002) Invalid comparison operator (=) causes EmptyStackException in DRLParser/ParserHelper

by Wolfgang Laun (JIRA)

Invalid comparison operator (=) causes EmptyStackException in DRLParser/ParserHelper ------------------------------------------------------------------------------------ Key: JBRULES-3002 URL: https://issues.jboss.org/browse/JBRULES-3002 Project: Drools Issue Type: Bug Security Level: Public (Everyone can see) Components: drools-compiler (expert) Affects Versions: 5.2.0.M2 Reporter: Wolfgang Laun Assignee: Mark Proctor class Customer { int custid; //... } rule x when $c: Customer( custid = 100 ) // Typo, wanted: "==" then end [0,0]: Line 47:0 unexpected exception at input 'rule'. Exception: java.util.EmptyStackException. Stack trace: java.util.EmptyStackException at java.util.Stack.peek(Stack.java:102) at java.util.Stack.pop(Stack.java:84) at org.drools.lang.ParserHelper.popParaphrases(ParserHelper.java:409) at org.drools.lang.ParserHelper.end(ParserHelper.java:723) at org.drools.lang.DRLParser.rule(DRLParser.java:915) at org.drools.lang.DRLParser.statement(DRLParser.java:248) at org.drools.lang.DRLParser.compilationUnit(DRLParser.java:143) at org.drools.compiler.DrlParser.compile(DrlParser.java:225) at org.drools.compiler.DrlParser.parse(DrlParser.java:136) at org.drools.compiler.DrlParser.parse(DrlParser.java:141) at org.drools.compiler.PackageBuilder.addPackageFromDrl(PackageBuilder.java:292) at org.drools.compiler.PackageBuilder.addKnowledgeResource(PackageBuilder.java:471) at org.drools.builder.impl.KnowledgeBuilderImpl.add(KnowledgeBuilderImpl.java:28) -- This message is automatically generated by JIRA. For more information on JIRA, see: http://www.atlassian.com/software/jira

13 years

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[JBoss JIRA] Created: (JBRULES-2222) Rule silently discarded if RHS calls an undefined DRL function

by Wolfgang Laun (JIRA)

Rule silently discarded if RHS calls an undefined DRL function -------------------------------------------------------------- Key: JBRULES-2222 URL: https://jira.jboss.org/jira/browse/JBRULES-2222 Project: JBoss Drools Issue Type: Bug Security Level: Public (Everyone can see) Components: drools-compiler Affects Versions: 5.0.1.FINAL Reporter: Wolfgang Laun Assignee: Mark Proctor If a function bar is called on a RHS of a rule in the same .drl file without being defined in the same .drl file, the .drl is compiled without kBuilder.getErrors() returning an error, and the rule is silently discarded (not firing, although it should). - Note that this error occurred when there was a function bar defined in another .drl file of the same package. Eclipse does indicate an error. -- This message is automatically generated by JIRA. - If you think it was sent incorrectly contact one of the administrators: https://jira.jboss.org/jira/secure/Administrators.jspa - For more information on JIRA, see: http://www.atlassian.com/software/jira

13 years

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[JBoss JIRA] Created: (JBRULES-2761) Restriction operator parameters should be strings, not token sequences

by Wolfgang Laun (JIRA)

Restriction operator parameters should be strings, not token sequences ---------------------------------------------------------------------- Key: JBRULES-2761 URL: https://jira.jboss.org/browse/JBRULES-2761 Project: Drools Issue Type: Feature Request Security Level: Public (Everyone can see) Reporter: Wolfgang Laun Assignee: Mark Proctor User defined operators (similar to "matches" or the temporal ops) may have parameters, written in '[' and ']' after the identifier denoting the relational operator. Text between the brackets is currently parsed as a "chunk", requiring the text to be composed from tokens recognized by the lexer. This is too restrictive since all Unicode characters that aren't letters (and this part of an identifier) are simply dropped. It should be simple to parse the text between '[' and ']' as a special form of recursive string, with brackets as delimiters. This means that op[foo[1]] is OK, but op{bar[[] is not. -- This message is automatically generated by JIRA. - If you think it was sent incorrectly contact one of the administrators: https://jira.jboss.org/secure/Administrators.jspa - For more information on JIRA, see: http://www.atlassian.com/software/jira

13 years

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jboss-jira September 2011