Reputation: 10970
I'm trying to run very simple application using Drools and for a couple of hours now can't set up pom.xml with all dependencies.
Here is how it looks now:
<dependencies>
<!-- Drools engine -->
<dependency>
<groupId>org.drools</groupId>
<artifactId>drools-core</artifactId>
<version>5.4.0.Final</version>
</dependency>
<dependency>
<groupId>org.drools</groupId>
<artifactId>drools-compiler</artifactId>
<version>5.4.0.Final</version>
</dependency>
<!-- Test -->
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.7</version>
<scope>test</scope>
</dependency>
</dependencies>
Just like in https://community.jboss.org/wiki/DroolsMaven
But what I get:
org.drools.RuntimeDroolsException: Unable to load dialect 'org.drools.rule.builder.dialect.java.JavaDialectConfiguration:java:org.drools.rule.builder.dialect.java.JavaDialectConfiguration'
at org.drools.compiler.PackageBuilderConfiguration.addDialect(PackageBuilderConfiguration.java:313)
at org.drools.compiler.PackageBuilderConfiguration.buildDialectConfigurationMap(PackageBuilderConfiguration.java:298)
at org.drools.compiler.PackageBuilderConfiguration.init(PackageBuilderConfiguration.java:187)
at org.drools.compiler.PackageBuilderConfiguration.<init>(PackageBuilderConfiguration.java:160)
at org.drools.builder.impl.KnowledgeBuilderFactoryServiceImpl.newKnowledgeBuilderConfiguration(KnowledgeBuilderFactoryServiceImpl.java:26)
at org.drools.builder.KnowledgeBuilderFactory.newKnowledgeBuilderConfiguration(KnowledgeBuilderFactory.java:85)
yada-yada-yada
Caused by: java.lang.RuntimeException: The Janino jar is not in the classpath
If I try to add Janino I get another exception about some missing classes(I don't think I should add Janino here anyway as it should be a dependency of something else). Do I miss anything in my pom?
Thanks!
Leonty
Upvotes: 0
Views: 13319
Reputation: 27357
By default, drools-compiler uses the eclipse compiler (JavaDialectConfiguration.ECLIPSE
) for the java dialect which is a transitive dependency:
<dependency>
<groupId>org.eclipse.jdt.core.compiler</groupId>
<artifactId>ecj</artifactId>
</dependency>
However, if you prefer the janino compiler(JavaDialectConfiguration.JANINO
), you need to add the janino dependency yourself because it is an optional transitive dependency:
<dependency>
<groupId>org.codehaus.janino</groupId>
<artifactId>janino</artifactId>
<optional>true</optional>
</dependency>
Look at the droolsjbpm-parent pom to find out which version to use.
Upvotes: 2
Reputation: 10970
Turned out just the right version of Janino is needed for Drools 5.4.0 Final: 2.5.16 Newer versions luck class used in Drools.
<dependencies>
<!-- Drools engine -->
<dependency>
<groupId>org.drools</groupId>
<artifactId>drools-core</artifactId>
<version>5.4.0.Final</version>
</dependency>
<dependency>
<groupId>org.drools</groupId>
<artifactId>drools-compiler</artifactId>
<version>5.4.0.Final</version>
</dependency>
<dependency>
<groupId>org.codehaus.janino</groupId>
<artifactId>janino</artifactId>
<version>2.5.16</version>
</dependency>
<!-- Test -->
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.7</version>
<scope>test</scope>
</dependency>
</dependencies>
Upvotes: 1