[rules-users] Very basic running of drools 5, basic setup and quickstart
Berlin Brown
berlin.brown at gmail.com
Thu Apr 22 18:11:25 EDT 2010
Is there documentation on how to do this, including a full example. I saw
the pom file, but still don't know the run/compile targets?
2010/4/22 Greg Barton <greg_barton at yahoo.com>
> Have you ever thought of using maven? Your problem is no doubt with
> including the transitive dependencies of the drools libraries, which maven
> would do for you automatically. Here are the jars that were included
> automatically in a project I compiled with drools-core, drools-compiler,
> drools-api, all 5.0.1:
>
> antlr-runtime-3.1.1.jar
> core-3.4.2.v_883_R34x.jar
>
> drools-api-5.0.1.jar
> drools-compiler-5.0.1.jar
> drools-core-5.0.1.jar
> janino-2.5.15.jar
> joda-time-1.6.jar
> jsap-2.1.jar
> mvel2-2.0.10.jar
>
> This resulted from a dependencies section in the maven pom that had just
> this in it:
>
> <dependencies>
> <dependency>
> <groupId>org.drools</groupId>
> <artifactId>drools-core</artifactId>
> <version>5.0.1</version>
> </dependency>
> <dependency>
> <groupId>org.drools</groupId>
> <artifactId>drools-compiler</artifactId>
> <version>5.0.1</version>
> </dependency>
> <dependency>
> <groupId>org.drools</groupId>
> <artifactId>drools-api</artifactId>
> <version>5.0.1</version>
> </dependency>
> </dependencies>
>
> So I suggest you give maven a try. It makes this easy. :)
>
> --- On *Wed, 4/21/10, Berlin Brown <berlin.brown at gmail.com>* wrote:
>
>
> From: Berlin Brown <berlin.brown at gmail.com>
> Subject: [rules-users] Very basic running of drools 5, basic setup and
> quickstart
> To: rules-users at lists.jboss.org
> Date: Wednesday, April 21, 2010, 12:54 AM
>
>
> Is there a more comprehensive quick start for drools 5. I was attempting
> to run the simple Hello World .drl rule but I wanted to do it through an ant
> script, possibly with just javac/java:
>
> I get the following error: Note: I don't am running completely without
> Eclipse or any other IDE:
>
> test:
> [java] Exception in thread "main" org.drools.RuntimeDroolsException:
> Unable to load d
> ialect
> 'org.drools.rule.builder.dialect.java.JavaDialectConfiguration:java:org.drools.rule
> .builder.dialect.java.JavaDialectConfiguration'
> [java] at
> org.drools.compiler.PackageBuilderConfiguration.addDialect(PackageBuild
> erConfiguration.java:274)
> [java] at
> org.drools.compiler.PackageBuilderConfiguration.buildDialectConfigurati
> onMap(PackageBuilderConfiguration.java:259)
> [java] at
> org.drools.compiler.PackageBuilderConfiguration.init(PackageBuilderConf
> iguration.java:176)
> [java] at
> org.drools.compiler.PackageBuilderConfiguration.<init>(PackageBuilderCo
> nfiguration.java:153)
> [java] at
> org.drools.compiler.PackageBuilder.<init>(PackageBuilder.java:242)
> [java] at
> org.drools.compiler.PackageBuilder.<init>(PackageBuilder.java:142)
> [java] at
> org.drools.builder.impl.KnowledgeBuilderProviderImpl.newKnowledgeBuilde
> r(KnowledgeBuilderProviderImpl.java:29)
> [java] at
> org.drools.builder.KnowledgeBuilderFactory.newKnowledgeBuilder(Knowledg
> eBuilderFactory.java:29)
> [java] at org.berlin.rpg.rules.Rules.rules(Rules.java:33)
> [java] at org.berlin.rpg.rules.Rules.main(Rules.java:73)
> [java] Caused by: java.lang.RuntimeException: The Eclipse JDT Core jar
> is not in the
> classpath
> [java] at
> org.drools.rule.builder.dialect.java.JavaDialectConfiguration.setCompil
> er(JavaDialectConfiguration.java:94)
> [java] at
> org.drools.rule.builder.dialect.java.JavaDialectConfiguration.init(Java
> DialectConfiguration.java:55)
> [java] at
> org.drools.compiler.PackageBuilderConfiguration.addDialect(PackageBuild
> erConfiguration.java:270)
> [java] ... 9 more
> [java] Java Result: 1
>
> ...
> ...
>
> I do include the following libraries with my javac and java target:
>
> <path id="classpath">
> <pathelement location="${lib.dir}" />
> <pathelement location="${lib.dir}/drools-api-5.0.1.jar" />
> <pathelement location="${lib.dir}/drools-compiler-5.0.1.jar" />
> <pathelement location="${lib.dir}/drools-core-5.0.1.jar" />
> <pathelement location="${lib.dir}/janino-2.5.15.jar" />
> </path>
>
> Here is the Java code that is throwing the error. I commented out the
> java.compiler code, that didn't work either.
>
> public void rules() {
>
> /*
> final Properties properties = new Properties();
> properties.setProperty( "drools.dialect.java.compiler", "JANINO"
> );
> PackageBuilderConfiguration cfg = new PackageBuilderConfiguration(
> properties );
> JavaDialectConfiguration javaConf = (JavaDialectConfiguration)
> cfg.getDialectConfiguration( "java" );
> */
> final KnowledgeBuilder kbuilder =
> KnowledgeBuilderFactory.newKnowledgeBuilder();
>
> // this will parse and compile in one step
> kbuilder.add(ResourceFactory.newClassPathResource("HelloWorld.drl",
> Rules.class), ResourceType.DRL);
>
> // Check the builder for errors
> if (kbuilder.hasErrors()) {
> System.out.println(kbuilder.getErrors().toString());
> throw new RuntimeException("Unable to compile
> \"HelloWorld.drl\".");
> }
>
> // Get the compiled packages (which are serializable)
> final Collection<KnowledgePackage> pkgs =
> kbuilder.getKnowledgePackages();
>
> // Add the packages to a knowledgebase (deploy the knowledge
> packages).
> final KnowledgeBase kbase =
> KnowledgeBaseFactory.newKnowledgeBase();
> kbase.addKnowledgePackages(pkgs);
>
> final StatefulKnowledgeSession ksession =
> kbase.newStatefulKnowledgeSession();
> ksession.setGlobal("list", new ArrayList<Object>());
>
> ksession.addEventListener(new DebugAgendaEventListener());
> ksession.addEventListener(new DebugWorkingMemoryEventListener());
>
> // Setup the audit logging
> KnowledgeRuntimeLogger logger =
> KnowledgeRuntimeLoggerFactory.newFileLogger(ksession, "log/helloworld");
>
> final Message message = new Message();
> message.setMessage("Hello World");
> message.setStatus(Message.HELLO);
> ksession.insert(message);
>
> ksession.fireAllRules();
> logger.close();
> ksession.dispose();
> }
>
> ...
>
> Here I don't think Ant is relevant because I have fork set to true:
>
> <target name="test" depends="compile">
> <java classname="org.berlin.rpg.rules.Rules" fork="true">
> <classpath refid="classpath.rt" />
> <classpath>
> <pathelement location="${basedir}" />
> <pathelement location="${build.classes.dir}" />
> </classpath>
> </java>
> </target>
>
>
>
> The error is thrown at line 1.
>
> Basically, I haven't done anything except call
>
> final KnowledgeBuilder kbuilder =
> KnowledgeBuilderFactory.newKnowledgeBuilder();
>
> I am running with Windows XP, Java6, and within Ant.1.7.
>
>
>
>
>
> --
> Berlin Brown (berlin dot brown at gmail.com)
> http://botnode.com
> http://berlinbrowndev.blogspot.com/
>
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>
>
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--
Berlin Brown (berlin dot brown at gmail.com)
http://botnode.com
http://berlinbrowndev.blogspot.com/
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