Welcome to OStack Knowledge Sharing Community for programmer and developer-Open, Learning and Share
Ask a Question
Welcome To Ask or Share your Answers For Others

Categories

java - Fuseki how to add Pellet reasoner

0 votes
354 views
in Technique[技术] by (71.8m points)

java - Fuseki how to add Pellet reasoner

I want to use pellet reasoner with my Fuseki 2.3.1

First: I added Pellet reasoner to my config.ttl as this:

ja:reasoner
        [ ja:reasonerClass
        "org.mindswap.pellet.jena.PelletReasonerFactory";]

So now I have to add the jar for Pellet to fuseki

This page explains how to add jars (not specificaly pellete) to fuseki

https://jena.apache.org/documentation/permissions/example.html

So I commet this line

exec $JAVA $JVM_ARGS -jar "$JAR" "$@"

and I uncommet this line

java $JVM_ARGS -cp "$JAR:$APPJAR" org.apache.jena.fuseki.cmd.FusekiCmd "$@"

and uncomment the line that starts with APPJAR=

now I still need to know and download the jars for Pellete, I found this link https://datababel.wordpress.com/2013/06/26/fuseki-using-pellet-inference/ that says which are the jars,

I downloaded the lastest available version from maven, which are:

pellet-jena-ignazio1977-2.4.0-ignazio1977.jar

pellet-rules-2.3.6-ansell.jar

pellet-el-2.3.6-ansell.jar

pellet-datatypes-2.3.6-ansell.jar

pellet-core-ignazio1977-2.4.0-ignazio1977.jar

aterm-java-1.8.2-p1.jar

commons-collections4-4.1-javadoc.jar

commons-collections4-4.1.jar

and I added them to fuseki-server script like this:

APPJAR=pellet-jena-ignazio1977-2.4.0-ignazio1977.jar:pellet-rules-2.3.6-ansell.jar:pellet-el-2.3.6-ansell.jar:pellet-datatypes-2.3.6-ansell.jar:pellet-core-ignazio1977-2.4.0-ignazio1977.jar:aterm-java-1.8.2-p1.jar:commons-collections4-4.1-javadoc.jar:commons-collections4-4.1.jar

(they are in the home directory of fuseki)

I run ./fuseki-server, and I get this error

[2016-03-30 16:49:06] Server     INFO  Fuseki 2.3.1 2015-12-08T09:24:07+0000
[2016-03-30 16:49:07] Config     INFO  FUSEKI_HOME=/usr/local/apache-jena-fuseki-2.3.1
[2016-03-30 16:49:07] Config     INFO  FUSEKI_BASE=/usr/local/apache-jena-fuseki-2.3.1/run
[2016-03-30 16:49:07] Servlet    INFO  Initializing Shiro environment
[2016-03-30 16:49:07] Config     INFO  Shiro file: file:///usr/local/apache-jena-fuseki-2.3.1/run/shiro.ini
[2016-03-30 16:49:07] Config     INFO  Load configuration: file:///usr/local/apache-jena-fuseki-2.3.1/run/configuration/config.ttl
[2016-03-30 16:49:07] AssemblerHelp WARN  ja:loadClass: Migration to Jena3: Converting com.hp.hpl.jena.tdb.TDB to org.apache.jena.tdb.TDB
[2016-03-30 16:49:07] Server     ERROR Exception in initialization: com/hp/hpl/jena/reasoner/ReasonerFactory
Exception in thread "main" java.lang.NoClassDefFoundError: com/hp/hpl/jena/reasoner/ReasonerFactory
    at java.lang.ClassLoader.defineClass1(Native Method)
    at java.lang.ClassLoader.defineClass(ClassLoader.java:760)
    at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
    at java.net.URLClassLoader.defineClass(URLClassLoader.java:467)
    at java.net.URLClassLoader.access$100(URLClassLoader.java:73)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:368)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:362)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:361)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
    at java.lang.Class.forName0(Native Method)
    at java.lang.Class.forName(Class.java:264)
    at org.apache.jena.assembler.assemblers.AssemblerBase.loadClass(AssemblerBase.java:109)
    at org.apache.jena.assembler.assemblers.ReasonerFactoryAssembler.getReasonerFactoryByClassName(ReasonerFactoryAssembler.java:140)
    at org.apache.jena.assembler.assemblers.ReasonerFactoryAssembler.getReasonerFactory(ReasonerFactoryAssembler.java:131)
    at org.apache.jena.assembler.assemblers.ReasonerFactoryAssembler.open(ReasonerFactoryAssembler.java:50)
    at org.apache.jena.assembler.assemblers.AssemblerGroup$PlainAssemblerGroup.openBySpecificType(AssemblerGroup.java:130)
    at org.apache.jena.assembler.assemblers.AssemblerGroup$PlainAssemblerGroup.open(AssemblerGroup.java:117)
    at org.apache.jena.assembler.assemblers.AssemblerGroup$ExpandingAssemblerGroup.open(AssemblerGroup.java:81)
    at org.apache.jena.assembler.assemblers.AssemblerBase.open(AssemblerBase.java:39)
    at org.apache.jena.assembler.assemblers.AssemblerBase.open(AssemblerBase.java:35)
    at org.apache.jena.assembler.assemblers.InfModelAssembler.getReasonerFactory(InfModelAssembler.java:53)
    at org.apache.jena.assembler.assemblers.InfModelAssembler.getReasoner(InfModelAssembler.java:46)
    at org.apache.jena.assembler.assemblers.InfModelAssembler.openEmptyModel(InfModelAssembler.java:34)
    at org.apache.jena.assembler.assemblers.ModelAssembler.openModel(ModelAssembler.java:36)
    at org.apache.jena.assembler.assemblers.ModelAssembler.open(ModelAssembler.java:43)
    at org.apache.jena.assembler.assemblers.AssemblerGroup$PlainAssemblerGroup.openBySpecificType(AssemblerGroup.java:130)
    at org.apache.jena.assembler.assemblers.AssemblerGroup$PlainAssemblerGroup.open(AssemblerGroup.java:117)
    at org.apache.jena.assembler.assemblers.AssemblerGroup$ExpandingAssemblerGroup.open(AssemblerGroup.java:81)
    at org.apache.jena.assembler.assemblers.AssemblerBase.open(AssemblerBase.java:39)
    at org.apache.jena.assembler.assemblers.AssemblerBase.open(AssemblerBase.java:35)
    at org.apache.jena.assembler.assemblers.AssemblerGroup.openModel(AssemblerGroup.java:35)
    at org.apache.jena.sparql.core.assembler.DatasetAssembler.createDataset(DatasetAssembler.java:59)
    at org.apache.jena.sparql.core.assembler.DatasetAssembler.open(DatasetAssembler.java:43)
    at org.apache.jena.assembler.assemblers.AssemblerGroup$PlainAssemblerGroup.openBySpecificType(AssemblerGroup.java:130)
    at org.apache.jena.assembler.assemblers.AssemblerGroup$PlainAssemblerGroup.open(AssemblerGroup.java:117)
    at org.apache.jena.assembler.assemblers.AssemblerGroup$ExpandingAssemblerGroup.open(AssemblerGroup.java:81)
    at org.apache.jena.assembler.assemblers.AssemblerBase.open(AssemblerBase.java:39)
    at org.apache.jena.assembler.assemblers.AssemblerBase.open(AssemblerBase.java:35)
    at org.apache.jena.fuseki.build.Builder.buildDataService(Builder.java:75)
    at org.apache.jena.fuseki.build.Builder.buildDataAccessPoint(Builder.java:60)
    at org.apache.jena.fuseki.build.FusekiConfig.readConfiguration(FusekiConfig.java:249)
    at org.apache.jena.fuseki.build.FusekiConfig.readConfigurationDirectory(FusekiConfig.java:223)
    at org.apache.jena.fuseki.server.FusekiServer.initializeDataAccessPoints(FusekiServer.java:212)
    at org.apache.jena.fuseki.server.FusekiServerListener.init(FusekiServerListener.java:78)
    at org.apache.jena.fuseki.server.FusekiServerListener.contextInitialized(FusekiServerListener.java:46)
    at org.eclipse.jetty.server.handler.ContextHandler.callContextInitialized(ContextHandler.java:835)
    at org.eclipse.jetty.servlet.ServletContextHandler.callContextInitialized(ServletContextHandler.java:530)
    at org.eclipse.jetty.server.handler.ContextHandler.startContext(ContextHandler.java:808)
    at org.eclipse.jetty.servlet.ServletContextHandler.startContext(ServletContextHandler.java:342)
    at org.eclipse.jetty.webapp.WebAppContext.startWebapp(WebAppContext.java:1368)
    at org.eclipse.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1335)
    at org.eclipse.jetty.server.handler.ContextHandler.doStart(ContextHandler.java:772)
    at org.eclipse.jetty.servlet.ServletContextHandler.doStart(ServletContextHandler.java:259)
    at org.eclipse.jetty.webapp.WebAppContext.doStart(WebAppContext.java:511)
    at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:68)
    at org.eclipse.jetty.util.component.ContainerLifeCycle.start(ContainerLifeCycle.java:132)
    at org.eclipse.jetty.server.Server.start(Server.java:405)
    at org.eclipse.jetty.util.component.ContainerLifeCycle.doStart(ContainerLifeCycle.java:106)
    at org.eclipse.jetty.server.handler.AbstractHandler.doStart(AbstractHandler.java:61)
    at org.eclipse.jetty.server.Server.doStart(Server.java:372)
    at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:68)
    at org.apache.jena.fuseki.jetty.JettyFuseki.start(JettyFuseki.java:120)
    at org.apache.jena.fuseki.cmd.FusekiCmd$FusekiCmdInner.exec(FusekiCmd.java:359)
    at jena.cmd.CmdMain.mainMethod(CmdMain.java:93)
    at jena.cmd.CmdMain.mainRun(CmdMain.java:58)
    at jena.cmd.CmdMain.mainRun(CmdMain.java:45)
    at org.apache.jena.fuseki.cmd.FusekiCmd$FusekiCmdInner.innerMain(FusekiCmd.java:95)
    at org.apache.jena.fuseki.cmd.FusekiCmd.main(FusekiCmd.java:60)
Caused by: java.lang.ClassNotFoundException: com.hp.hpl.jena.reasoner.ReasonerFactory
    at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
    ... 71 more

Any help please

Hint: I dont know if what I tried is correct of not, all I want is to include Pellet reasoner into fuseki

Update

After ignazio told me that I am mixing the jars,

I went to Pellet git hut and download the src and used maven to complie and get the jars

Then I changed the jar that I am using to :

commons-collections4-4.1-javadoc.jar:commons-collections4-4.1.jar:pellet-cli-2.4.0-SNAPSHOT.jar:jena-core-2.13.0.jar:pellet-jena-2.4.0-SNAPSHOT.jar:pellet-modularity-2.4.0-SNAPSHOT.jar:pellet-owlapi-2.4.0-SNAPSHOT.jar:pellet-pellint-2.4.0-SNAPSHOT.jar

but I got this exception:

[2016-03-30 17:42:09] AssemblerHelp WARN  ja:loadClass: Migration to Jena3: Converting com.hp.hpl.jena.tdb.TDB to org.apache.jena.tdb.TDB
[2016-03-30 17:42:10] RDFDefaultErrorHandler WARN  unknown-source: {W136} Relative URIs are not permitted in RDF: specifically <ont-policy.rdf>
[2016-03-30 17:42:10] Server     ERROR Exception in initialization: expected class org.apache.jena.reasoner.ReasonerFactory, but had class org.mindswap.pellet.jena.PelletReasonerFactory
[2016-03-30 17:42:10] WebAppContext WARN  Failed startup of context o.e.j.w.WebAppContext@5bcde458{/,file:///usr/local/apache-jena-fuseki-2.3.1/webapp/,STARTING}
org.apache.jena.assembler.exceptions.NotExpectedTypeException: expected class org.apache.jena.reasoner.ReasonerFactory, but had class org.mindswap.pellet.jena.PelletReasonerFactory
  doing:
    root: 79f74f0ed3a21ef24b1cbccda7d37b62 with type: http://jena.hpl.hp.com/2005/11/Assembler#ReasonerFactory assembler class: class org.apache.jena.assembler.assemblers.ReasonerFactoryAssembler
    root: file:///usr/local/apache-jena-fuseki-2.3.1/run/configuration/config.ttl#model_inf with type: http://jena.hpl.hp.com/2005/11/Assembler#InfModel assembler class: class org.apache.jena.assembler.assemblers.InfModelAssembler
    root: file:///usr/local/apache-jena-fuseki-2.3.1/run/configuration/config.ttl#dataset with type: http://jena.hpl.hp.com/2005/11/Assembler#RDFDataset assembler class: class org.apache.jena.sparql.core.assembler.DatasetAssembler

    at org.apache.jena.assembler.assemblers.Reasone

与恶龙缠斗过久,自身亦成为恶龙；凝视深渊过久,深渊将回以凝视…
Welcome To Ask or Share your Answers For Others

1 Answer

0 votes
by (71.8m points)

Solution: Use openllet instead. Just change to ja:reasonerClass "openllet.jena.PelletReasonerFactory" in the config file, and download the openllet distribution and other jar files needed to the classpath.

Explanation:The error

expected class org.apache.jena.reasoner.ReasonerFactory, but had class org.mindswap.pellet.jena.PelletReasonerFactory

is caused by that the pellet's org.mindswap.pellet.jena.PelletReasonerFactory implements the old interface (com.hp.hpl.jena.reasoner.ReasonerFactory) which is different from the interface used in Fuseki (org.apache.jena.reasoner.ReasonerFactory).

The openllet's openllet.jena.PelletReasonerFactory implements the correct interface (org.apache.jena.reasoner.ReasonerFactory).

Check their source code:

openllet's PelletReasonerFactory.java

pellet's PelletReasonerFactory.java


与恶龙缠斗过久,自身亦成为恶龙；凝视深渊过久,深渊将回以凝视…
Welcome to OStack Knowledge Sharing Community for programmer and developer-Open, Learning and Share
Click Here to Ask a Question

Just Browsing Browsing

2.1m questions

2.1m answers

60 comments

57.0k users

Most popular tags

Powered by Question2Answer
Donate
Theme by Q2A Market&&OStack.cn
...