Error trying to use slf4j

[Remi Forax]

On 01/06/2013 05:43 PM, Bryan Castillo wrote:
> I just ran into an error using Nashorn today with slf4j.  I don't see this
> error with Rhino.

It's a bug in the FacetIntrospector of dynalink, if the class is not 
public, the introspector should try to find a super class or an 
interface that declares the method, here Object::toString.

Rémi

>
> source:
> ----------------
>
> package bcc;
>
> import javax.script.ScriptEngine;
> import javax.script.ScriptEngineManager;
>
> public class UseSlf4j {
>
> public static void main(String[] args) throws Exception {
> ScriptEngine engine = new ScriptEngineManager().getEngineByName("nashorn");
> engine.eval(
>      "var logger =
> Packages.org.slf4j.LoggerFactory.getLogger('my_script');\n" +
>      "java.lang.System.out.println('Here is a logger: ' + logger);\n" +
>      "logger.info('From a script.');"
> );
> }
>
> }
>
>
> output:
> -----------------
>
> Here is a logger: org.slf4j.impl.Log4jLoggerAdapter(my_script)
> Exception in thread "main" java.lang.IllegalAccessError: Failed to
> unreflect method public java.lang.String
> org.slf4j.helpers.NamedLoggerBase.getName()
> at org.dynalang.dynalink.support.Lookup.unreflect(Lookup.java:61)
> at
> org.dynalang.dynalink.beans.FacetIntrospector.unreflect(FacetIntrospector.java:113)
> at
> org.dynalang.dynalink.beans.AbstractJavaLinker.<init>(AbstractJavaLinker.java:101)
> at org.dynalang.dynalink.beans.BeanLinker.<init>(BeanLinker.java:44)
> at
> org.dynalang.dynalink.beans.BeansLinker$1.computeValue(BeansLinker.java:71)
> at
> org.dynalang.dynalink.beans.BeansLinker$1.computeValue(BeansLinker.java:67)
> at java.lang.ClassValue.getFromHashMap(ClassValue.java:227)
> at java.lang.ClassValue.getFromBackup(ClassValue.java:209)
> at java.lang.ClassValue.get(ClassValue.java:115)
> at
> org.dynalang.dynalink.beans.BeansLinker.getLinkerForClass(BeansLinker.java:93)
> at
> org.dynalang.dynalink.beans.BeansLinker.getGuardedInvocation(BeansLinker.java:111)
> at
> org.dynalang.dynalink.support.CompositeGuardingDynamicLinker.getGuardedInvocation(CompositeGuardingDynamicLinker.java:58)
> at
> org.dynalang.dynalink.support.LinkerServicesImpl.getGuardedInvocation(LinkerServicesImpl.java:72)
> at org.dynalang.dynalink.DynamicLinker.relink(DynamicLinker.java:163)
> at jdk.nashorn.internal.scripts.Script$?003Ceval?003E.runScript(<eval>:3)
> at
> jdk.nashorn.internal.runtime.ScriptFunction.invoke(ScriptFunction.java:359)
> at jdk.nashorn.internal.runtime.ScriptRuntime.apply(ScriptRuntime.java:310)
> at
> jdk.nashorn.api.scripting.NashornScriptEngine.evalImpl(NashornScriptEngine.java:438)
> at
> jdk.nashorn.api.scripting.NashornScriptEngine.evalImpl(NashornScriptEngine.java:423)
> at
> jdk.nashorn.api.scripting.NashornScriptEngine.eval(NashornScriptEngine.java:150)
> at javax.script.AbstractScriptEngine.eval(AbstractScriptEngine.java:264)
> at bcc.UseSlf4j.main(UseSlf4j.java:10)
> Caused by: java.lang.IllegalAccessException: class is not public:
> org.slf4j.helpers.NamedLoggerBase.getName()String/invokeVirtual, from
> java.lang.Object/public
> at java.lang.invoke.MemberName.makeAccessException(MemberName.java:732)
> at
> java.lang.invoke.MethodHandles$Lookup.checkAccess(MethodHandles.java:1135)
> at
> java.lang.invoke.MethodHandles$Lookup.checkMethod(MethodHandles.java:1098)
> at
> java.lang.invoke.MethodHandles$Lookup.getDirectMethodCommon(MethodHandles.java:1209)
> at
> java.lang.invoke.MethodHandles$Lookup.getDirectMethod(MethodHandles.java:1199)
> at java.lang.invoke.MethodHandles$Lookup.unreflect(MethodHandles.java:914)
> at org.dynalang.dynalink.support.Lookup.unreflect(Lookup.java:59)
> ... 21 more
>
>
>
> jdk:
> -----------------
>
> C:\Users\bcastill>"c:\Program Files\Java\jdk1.8.0\bin\java" -version
> java version "1.8.0-ea"
> Java(TM) SE Runtime Environment (build 1.8.0-ea-b71)
> Java HotSpot(TM) 64-Bit Server VM (build 25.0-b14, mixed mode)
>
>
> Nashorn version:
> ------------------------------------------
>
> bcastill at US-SEA-R9CMKD3 /cygdrive/c/bcastill/nashorn
> $ hg log -l 1
> changeset:   6:5a1b0714df0e
> tag:         tip
> user:        jlaskey
> date:        Fri Jan 04 09:58:33 2013 -0400
> summary:     8005663: Update copyright year to 2013
>
>
>
> Slf4j related jars:
> ----------------------------------
> $ ls -l *slf4j*.jar log*.jar
> ----------+ 1 bcastill Domain Users  17308 Jan  5 21:59
> jcl-over-slf4j-1.6.1.jar
> ----------+ 1 bcastill Domain Users 481534 Jan  5 22:00 log4j-1.2.16.jar
> ----------+ 1 bcastill Domain Users  25496 Jan  5 21:59 slf4j-api-1.6.1.jar
> ----------+ 1 bcastill Domain Users   9753 Jan  5 21:59
> slf4j-log4j12-1.6.1.jar