JSR223 ScriptEngineManager cannot find both jython and jruby ScriptEngines when
using maven assembly plugin
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Key: JRUBY-4057
URL: http://jira.codehaus.org/browse/JRUBY-4057
Project: JRuby
Issue Type: Bug
Components: Embedding
Affects Versions: JRuby 1.4.0RC1
Environment: $ java -version
java version "1.6.0_14"
Java(TM) SE Runtime Environment (build 1.6.0_14-b08)
Java HotSpot(TM) Client VM (build 14.0-b16, mixed mode, sharing)
$ mvn -version
Apache Maven 2.2.1 (r801777; 2009-08-06 14:16:01-0500)
Reporter: Michael Heuer
Attachments: jruby-jsr223.tar.gz
See attached example maven project.
If both jruby and jython are enabled using runtime dependencies*
pom.xml:
<dependencies>
<dependency>
<groupId>org.jruby</groupId>
<artifactId>jruby</artifactId>
<version>1.4.0RC1</version>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.python</groupId>
<artifactId>jython</artifactId>
<version>2.5.1</version>
<scope>runtime</scope>
</dependency>
</dependencies>
then the jar-with-dependencies assembly jar will fail to register both
ScriptEngine implementations
$ mvn assembly:assembly
$ java -jar target/example-1.0-SNAPSHOT-jar-with-dependencies.jar
could not find jruby engine
whereas creating an explicit classpath works fine
$ java -classpath
"jython-2.5.1.jar;jruby-1.4.0RC1.jar;target/example-1.0-SNAPSHOT.jar"
example.Jsr223Example
ok
It appears the JSR223 mechanism cannot handle multiple copies of its metadata
in example-1.0-SNAPSHOT-jar-with-dependencies.jar.
$ jar tvf target/example-1.0-SNAPSHOT-jar-with-dependencies.jar | grep
javax.script.ScriptEngineFactory
42 Wed Sep 16 13:39:46 CDT 2009
META-INF/services/javax.script.ScriptEngineFactory
40 Sat Sep 26 13:48:04 CDT 2009
META-INF/services/javax.script.ScriptEngineFactory
* - please note a jython-2.5.1.jar artifact is not yet available on maven
central repo, will have to be installed manually
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