Upgrading the javax.scripting version of Rhino.
Michael Haefele
I'm interested in upgrading the version of Rhino used in
javax.scripting.
(At least initially because envjs says not to use the bundled one
http://www.envjs.com/doc/guides#running-rhino).
I was expecting something similar to
ScriptEngineManager factory = new ScriptEngineManager();
factory.registerEngineName("JavaScript", );
ScriptEngine engine = factory.getEngineByName("JavaScript");
...
...but I can't seem to locate anything resembling an implementation of
ScriptEngineFactory for this.
Am I missing something?
Thanks,
Mike
Kevin Krouse
Hi Mike,
You can use the JSR 223 js-engine.jar found at:
https://scripting.dev.java.net/servlets/ProjectDocumentList
Download the jsr223-engines.tar.gz, extract the js-engine.jar. There is a
META-INF/services/javax.script.ScriptEngineFactory file that registers the
script engine. I think you can request this new script engine with
something
like 'factory.getEngineByName("rhino-nonjdk")'.
--
Kevin
Michael Haefele
Thanks for the help!
In case anyone is going down a similar path, I ended up doing the
following to get a mavenized version of this.
1. Exported the scripting/engines/javascript source using cvs.
* See https://scripting.dev.java.net/source/browse/scripting/
2. Added a basic pom.xml file
3. moved the src/ directory contents to src/main/java/
4. moved the META-INF directory to src/main/resources/
5. deleted bin, lib and make directory
6. Added a dependency on the latest rhino version to the pom.xml
<dependencies>
<dependency>
<groupId>rhino</groupId>
<artifactId>js</artifactId>
<version>1.7R2</version>
</dependency>
</dependencies>
7. Added some sanity check tests to src/test/java
That worked like a charm and (being mavenized) will be easy to upgrade
to newer versions of rhino.
Also, for bonus points, I modified RhinoScriptEngineFactory to return
a more accurate version of the Rhino Engine (it was hardcoded to
1.6R7).
Added the following method to RhinoScriptEngineFactory:
private String getRhinoVersion()
{
// The rhino version message looks like "Rhino 1.7 release 2
2009 03 22"
// We need something of the form "1.7R2"
String longVersion =
ScriptRuntime.getMessage("implementation.version", null);
Pattern pattern = Pattern.compile("Rhino ([0-9.]*)( release
([0-9.]*))?");
Matcher matcher = pattern.matcher(longVersion);
if (matcher.find() && matcher.group(1) != null)
{
String version = matcher.group(1);
if (matcher.group(3) != null)
version += "R" + matcher.group(3);
return version;
}
return "unknown";
}
And replaced
} else if (key.equals(ScriptEngine.ENGINE_VERSION)) {
return "1.6R7";
with
} else if (key.equals(ScriptEngine.ENGINE_VERSION)) {
return getRhinoVersion();
Mike
