August 2009 - rules-dev - Jboss List Archives

Possible London Drools Boot Camp for October

by Mark Proctor

The San Francisco Boot Camp <http://blog.athico.com/2009/03/drools-boot-camp-san-francisco-june.html> was a great success, with a fantastic turnout <http://www.jboss.org/community/wiki/DroolsBootCampSanFranciscoJune2009>. If I got enough names I could be tempted to do a London based event at the JBoss offices, probably in October. I would probably aim for this event to be just a 1 or 2 day event, dependant on the requests I receive. If you are interested, send me an email. The main idea would be to get 15 to 20 like minded people together for a day or two, where we can just discuss each others problems and we in the Drools team can help you deep dive into the Drools code. Mark

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Re: [rules-dev] Exception with Drools-XLS and Maven: "An error occured opening the workbook."

by Michael Neale

hmm... might be a worthy of a wiki entry? On Thu, Aug 20, 2009 at 12:36 AM, Bernd Rücker<bernd.ruecker(a)camunda.com> wrote: > Okay, it took some more investigation and one maven specialist of the > company to figure it out, we added this to the maven pom and now it works: > > <plugin> > <groupId>org.apache.maven.plugins</groupId> > <artifactId>maven-resources-plugin</artifactId> > <configuration> > <encoding>UTF-8</encoding> > <nonFilteredFileExtensions> > <nonFilteredFileExtension>xls</nonFilteredFileExtension> > </nonFilteredFileExtensions> > </configuration> > </plugin> > > Cheers > Bernd > > -----Ursprüngliche Nachricht----- > Von: rules-dev-bounces(a)lists.jboss.org > [mailto:rules-dev-bounces@lists.jboss.org] Im Auftrag von Geoffrey De Smet > Gesendet: Dienstag, 11. August 2009 20:22 > An: rules-dev(a)lists.jboss.org > Betreff: Re: [rules-dev] Exception with Drools-XLS and Maven: "An error > occured opening the workbook." > > By default the maven resources plugin copies resources in the encoding > of the platform it's build on IRCC. > It's better to lock that down on UTF-8. > It even logs a warning if it's not locked down. > Is that xls file a resource that's being copied? > > With kind regards, > Geoffrey De Smet > > > Bernd Rücker schreef: >> Hi all. >> >> >> >> I recently had the same exception as reported in >> https://jira.jboss.org/jira/browse/GUVNOR-286, but didn’t find anything >> on the web. We currently have the same error with Maven and Drools >> 5.0.1, very strange: >> >> >> >> Testcode >> >> >> >> public static void main(String[] args) { >> >> final DecisionTableConfiguration dtableconfiguration = >> KnowledgeBuilderFactory.newDecisionTableConfiguration(); >> >> dtableconfiguration.setInputType( DecisionTableInputType.XLS > ); >> >> >> >> final KnowledgeBuilder kbuilder = >> KnowledgeBuilderFactory.newKnowledgeBuilder(); >> >> kbuilder.add( >> ResourceFactory.newClassPathResource("Sample.xls", Test.class ), >> >> ResourceType.DTABLE, >> >> dtableconfiguration ); >> >> >> >> final KnowledgeBase kbase = >> KnowledgeBaseFactory.newKnowledgeBase(); >> >> kbase.addKnowledgePackages( kbuilder.getKnowledgePackages() > ); >> >> >> >> // typical decision tables are used statelessly >> >> StatefulKnowledgeSession ksession = >> kbase.newStatefulKnowledgeSession(); >> >> } >> >> >> >> Stacktrace: >> >> >> >> org.drools.template.parser.DecisionTableParseException: An error occured > >> opening the workbook. It is possible that the encoding of the document >> did not match the encoding of the reader. >> >> at >> > org.drools.decisiontable.parser.xls.ExcelParser.parseFile(ExcelParser.java > :89) >> >> at >> > org.drools.decisiontable.SpreadsheetCompiler.compile(SpreadsheetCompiler.j > ava:90) >> >> at >> > org.drools.decisiontable.SpreadsheetCompiler.compile(SpreadsheetCompiler.j > ava:69) >> >> at >> > org.drools.decisiontable.DecisionTableProviderImpl.compileStream(DecisionT > ableProviderImpl.java:29) >> >> at >> > org.drools.decisiontable.DecisionTableProviderImpl.loadFromInputStream(Dec > isionTableProviderImpl.java:19) >> >> at >> > org.drools.compiler.DecisionTableFactory.loadFromInputStream(DecisionTable > Factory.java:16) >> >> at >> > org.drools.compiler.PackageBuilder.addKnowledgeResource(PackageBuilder.jav > a:508) >> >> at >> > org.drools.builder.impl.KnowledgeBuilderImpl.add(KnowledgeBuilderImpl.java > :31) >> >> at Test.main(Test.java:21) >> >> Caused by: jxl.read.biff.BiffException: Unable to recognize OLE stream >> >> at jxl.read.biff.CompoundFile.<init>(CompoundFile.java:111) >> >> at jxl.read.biff.File.<init>(File.java:113) >> >> at jxl.Workbook.getWorkbook(Workbook.java:250) >> >> at jxl.Workbook.getWorkbook(Workbook.java:235) >> >> at >> > org.drools.decisiontable.parser.xls.ExcelParser.parseFile(ExcelParser.java > :74) >> >> ... 8 more >> >> >> >> The strange thing: When we tried it with Eclipse (3.4.2) and created a >> Drools project, everything worked. When we created a maven project and >> added exactly the same libraries, the exception was caused. >> >> >> >> We tracked it down to the .project file: >> >> >> >> <?xml version="1.0" encoding="UTF-8"?> >> >> <projectDescription> >> >> <name>iks_drools</name> >> >> <comment></comment> >> >> <projects> >> >> </projects> >> >> <buildSpec> >> >> <buildCommand> >> >> <name>org.eclipse.jdt.core.javabuilder</name> >> >> <arguments> >> >> </arguments> >> >> </buildCommand> >> >>  >> >> <buildCommand> >> >> <name>org.drools.eclipse.droolsbuilder</name> >> >> <arguments> >> >> </arguments> >> >> </buildCommand> >> >> </buildSpec> >> >> <natures> >> >> <nature>org.eclipse.jdt.core.javanature</nature> >> >>  >> >> </natures> >> >> </projectDescription> >> >> >> >> With the comments it works, without the comments and the maven2Builder >> and natures it causes the exception. We are puzzled. >> >> >> >> Any ideas? >> >> >> >> Hopefully it is OK to post that to the dev lists, seems a pretty deep > thing… >> >> >> Thanks a lot and Cheers >> >> Bernd >> >> >> ------------------------------------------------------------------------ >> >> _______________________________________________ >> rules-dev mailing list >> rules-dev(a)lists.jboss.org >> https://lists.jboss.org/mailman/listinfo/rules-dev > > _______________________________________________ > rules-dev mailing list > rules-dev(a)lists.jboss.org > https://lists.jboss.org/mailman/listinfo/rules-dev > _______________________________________________ > rules-dev mailing list > rules-dev(a)lists.jboss.org > https://lists.jboss.org/mailman/listinfo/rules-dev > -- Michael D Neale home: www.michaelneale.net blog: michaelneale.blogspot.com

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Re: [rules-dev] Exception with Drools-XLS and Maven: "An error occured opening the workbook."

by Michael Neale

yes - I think in all cases it turned out to be munging of the XLS file (it is certainly not text ;) So I think that is what the jexcel library reports when things go badly wrong... That other error in JIRA is to do with supporting open office files (ie you get that error if you try to load up a ODS file). Is this something we can raise with the maven plugin to not mess with XLS files? On Thu, Aug 20, 2009 at 12:36 AM, Bernd Rücker<bernd.ruecker(a)camunda.com> wrote: > Okay, it took some more investigation and one maven specialist of the > company to figure it out, we added this to the maven pom and now it works: > > <plugin> > <groupId>org.apache.maven.plugins</groupId> > <artifactId>maven-resources-plugin</artifactId> > <configuration> > <encoding>UTF-8</encoding> > <nonFilteredFileExtensions> > <nonFilteredFileExtension>xls</nonFilteredFileExtension> > </nonFilteredFileExtensions> > </configuration> > </plugin> > > Cheers > Bernd > > -----Ursprüngliche Nachricht----- > Von: rules-dev-bounces(a)lists.jboss.org > [mailto:rules-dev-bounces@lists.jboss.org] Im Auftrag von Geoffrey De Smet > Gesendet: Dienstag, 11. August 2009 20:22 > An: rules-dev(a)lists.jboss.org > Betreff: Re: [rules-dev] Exception with Drools-XLS and Maven: "An error > occured opening the workbook." > > By default the maven resources plugin copies resources in the encoding > of the platform it's build on IRCC. > It's better to lock that down on UTF-8. > It even logs a warning if it's not locked down. > Is that xls file a resource that's being copied? > > With kind regards, > Geoffrey De Smet > > > Bernd Rücker schreef: >> Hi all. >> >> >> >> I recently had the same exception as reported in >> https://jira.jboss.org/jira/browse/GUVNOR-286, but didn’t find anything >> on the web. We currently have the same error with Maven and Drools >> 5.0.1, very strange: >> >> >> >> Testcode >> >> >> >> public static void main(String[] args) { >> >> final DecisionTableConfiguration dtableconfiguration = >> KnowledgeBuilderFactory.newDecisionTableConfiguration(); >> >> dtableconfiguration.setInputType( DecisionTableInputType.XLS > ); >> >> >> >> final KnowledgeBuilder kbuilder = >> KnowledgeBuilderFactory.newKnowledgeBuilder(); >> >> kbuilder.add( >> ResourceFactory.newClassPathResource("Sample.xls", Test.class ), >> >> ResourceType.DTABLE, >> >> dtableconfiguration ); >> >> >> >> final KnowledgeBase kbase = >> KnowledgeBaseFactory.newKnowledgeBase(); >> >> kbase.addKnowledgePackages( kbuilder.getKnowledgePackages() > ); >> >> >> >> // typical decision tables are used statelessly >> >> StatefulKnowledgeSession ksession = >> kbase.newStatefulKnowledgeSession(); >> >> } >> >> >> >> Stacktrace: >> >> >> >> org.drools.template.parser.DecisionTableParseException: An error occured > >> opening the workbook. It is possible that the encoding of the document >> did not match the encoding of the reader. >> >> at >> > org.drools.decisiontable.parser.xls.ExcelParser.parseFile(ExcelParser.java > :89) >> >> at >> > org.drools.decisiontable.SpreadsheetCompiler.compile(SpreadsheetCompiler.j > ava:90) >> >> at >> > org.drools.decisiontable.SpreadsheetCompiler.compile(SpreadsheetCompiler.j > ava:69) >> >> at >> > org.drools.decisiontable.DecisionTableProviderImpl.compileStream(DecisionT > ableProviderImpl.java:29) >> >> at >> > org.drools.decisiontable.DecisionTableProviderImpl.loadFromInputStream(Dec > isionTableProviderImpl.java:19) >> >> at >> > org.drools.compiler.DecisionTableFactory.loadFromInputStream(DecisionTable > Factory.java:16) >> >> at >> > org.drools.compiler.PackageBuilder.addKnowledgeResource(PackageBuilder.jav > a:508) >> >> at >> > org.drools.builder.impl.KnowledgeBuilderImpl.add(KnowledgeBuilderImpl.java > :31) >> >> at Test.main(Test.java:21) >> >> Caused by: jxl.read.biff.BiffException: Unable to recognize OLE stream >> >> at jxl.read.biff.CompoundFile.<init>(CompoundFile.java:111) >> >> at jxl.read.biff.File.<init>(File.java:113) >> >> at jxl.Workbook.getWorkbook(Workbook.java:250) >> >> at jxl.Workbook.getWorkbook(Workbook.java:235) >> >> at >> > org.drools.decisiontable.parser.xls.ExcelParser.parseFile(ExcelParser.java > :74) >> >> ... 8 more >> >> >> >> The strange thing: When we tried it with Eclipse (3.4.2) and created a >> Drools project, everything worked. When we created a maven project and >> added exactly the same libraries, the exception was caused. >> >> >> >> We tracked it down to the .project file: >> >> >> >> <?xml version="1.0" encoding="UTF-8"?> >> >> <projectDescription> >> >> <name>iks_drools</name> >> >> <comment></comment> >> >> <projects> >> >> </projects> >> >> <buildSpec> >> >> <buildCommand> >> >> <name>org.eclipse.jdt.core.javabuilder</name> >> >> <arguments> >> >> </arguments> >> >> </buildCommand> >> >>  >> >> <buildCommand> >> >> <name>org.drools.eclipse.droolsbuilder</name> >> >> <arguments> >> >> </arguments> >> >> </buildCommand> >> >> </buildSpec> >> >> <natures> >> >> <nature>org.eclipse.jdt.core.javanature</nature> >> >>  >> >> </natures> >> >> </projectDescription> >> >> >> >> With the comments it works, without the comments and the maven2Builder >> and natures it causes the exception. We are puzzled. >> >> >> >> Any ideas? >> >> >> >> Hopefully it is OK to post that to the dev lists, seems a pretty deep > thing… >> >> >> Thanks a lot and Cheers >> >> Bernd >> >> >> ------------------------------------------------------------------------ >> >> _______________________________________________ >> rules-dev mailing list >> rules-dev(a)lists.jboss.org >> https://lists.jboss.org/mailman/listinfo/rules-dev > > _______________________________________________ > rules-dev mailing list > rules-dev(a)lists.jboss.org > https://lists.jboss.org/mailman/listinfo/rules-dev > _______________________________________________ > rules-dev mailing list > rules-dev(a)lists.jboss.org > https://lists.jboss.org/mailman/listinfo/rules-dev > -- Michael D Neale home: www.michaelneale.net blog: michaelneale.blogspot.com

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Re: [rules-dev] Exception with Drools-XLS and Maven: "An error occured opening the workbook."

by Geoffrey De Smet

By default the maven resources plugin copies resources in the encoding of the platform it's build on IRCC. It's better to lock that down on UTF-8. It even logs a warning if it's not locked down. Is that xls file a resource that's being copied? With kind regards, Geoffrey De Smet Bernd Rücker schreef: > Hi all. > > > > I recently had the same exception as reported in > https://jira.jboss.org/jira/browse/GUVNOR-286, but didn’t find anything > on the web. We currently have the same error with Maven and Drools > 5.0.1, very strange: > > > > Testcode > > > > public static void main(String[] args) { > > final DecisionTableConfiguration dtableconfiguration = > KnowledgeBuilderFactory.newDecisionTableConfiguration(); > > dtableconfiguration.setInputType( DecisionTableInputType.XLS ); > > > > final KnowledgeBuilder kbuilder = > KnowledgeBuilderFactory.newKnowledgeBuilder(); > > kbuilder.add( > ResourceFactory.newClassPathResource("Sample.xls", Test.class ), > > ResourceType.DTABLE, > > dtableconfiguration ); > > > > final KnowledgeBase kbase = > KnowledgeBaseFactory.newKnowledgeBase(); > > kbase.addKnowledgePackages( kbuilder.getKnowledgePackages() ); > > > > // typical decision tables are used statelessly > > StatefulKnowledgeSession ksession = > kbase.newStatefulKnowledgeSession(); > > } > > > > Stacktrace: > > > > org.drools.template.parser.DecisionTableParseException: An error occured > opening the workbook. It is possible that the encoding of the document > did not match the encoding of the reader. > > at > org.drools.decisiontable.parser.xls.ExcelParser.parseFile(ExcelParser.java:89) > > at > org.drools.decisiontable.SpreadsheetCompiler.compile(SpreadsheetCompiler.java:90) > > at > org.drools.decisiontable.SpreadsheetCompiler.compile(SpreadsheetCompiler.java:69) > > at > org.drools.decisiontable.DecisionTableProviderImpl.compileStream(DecisionTableProviderImpl.java:29) > > at > org.drools.decisiontable.DecisionTableProviderImpl.loadFromInputStream(DecisionTableProviderImpl.java:19) > > at > org.drools.compiler.DecisionTableFactory.loadFromInputStream(DecisionTableFactory.java:16) > > at > org.drools.compiler.PackageBuilder.addKnowledgeResource(PackageBuilder.java:508) > > at > org.drools.builder.impl.KnowledgeBuilderImpl.add(KnowledgeBuilderImpl.java:31) > > at Test.main(Test.java:21) > > Caused by: jxl.read.biff.BiffException: Unable to recognize OLE stream > > at jxl.read.biff.CompoundFile.<init>(CompoundFile.java:111) > > at jxl.read.biff.File.<init>(File.java:113) > > at jxl.Workbook.getWorkbook(Workbook.java:250) > > at jxl.Workbook.getWorkbook(Workbook.java:235) > > at > org.drools.decisiontable.parser.xls.ExcelParser.parseFile(ExcelParser.java:74) > > ... 8 more > > > > The strange thing: When we tried it with Eclipse (3.4.2) and created a > Drools project, everything worked. When we created a maven project and > added exactly the same libraries, the exception was caused. > > > > We tracked it down to the .project file: > > > > <?xml version="1.0" encoding="UTF-8"?> > > <projectDescription> > > <name>iks_drools</name> > > <comment></comment> > > <projects> > > </projects> > > <buildSpec> > > <buildCommand> > > <name>org.eclipse.jdt.core.javabuilder</name> > > <arguments> > > </arguments> > > </buildCommand> > >  > > <buildCommand> > > <name>org.drools.eclipse.droolsbuilder</name> > > <arguments> > > </arguments> > > </buildCommand> > > </buildSpec> > > <natures> > > <nature>org.eclipse.jdt.core.javanature</nature> > >  > > </natures> > > </projectDescription> > > > > With the comments it works, without the comments and the maven2Builder > and natures it causes the exception. We are puzzled. > > > > Any ideas? > > > > Hopefully it is OK to post that to the dev lists, seems a pretty deep thing… > > > Thanks a lot and Cheers > > Bernd > > > ------------------------------------------------------------------------ > > _______________________________________________ > rules-dev mailing list > rules-dev(a)lists.jboss.org > https://lists.jboss.org/mailman/listinfo/rules-dev

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Drools Solver homepage

by Geoffrey De Smet

Hi guys, On the drools homepage, each of the major subprojects have a homepage, for example for Guvnor: http://labs.jboss.com/drools/drools-guvnor.html Such a homepage answers a few start questions: - What is it? - What are its features? - Lets see some screenshots. - Where do I go next? => download, examples, reference manual, blog, ... Drools Solver doesn't have such a homepage yet, so when I have to fill in a link to drools solver, I sometimes fill in the blog or the reference manual or even the article on Dzone. So such a Drools Solver homepage is missing: I can create some content for it, if JBoss is willing to add a page to the Drools homepage? WDYT? -- With kind regards, Geoffrey De Smet

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rules-dev August 2009