Hi,
I am experimenting with running groovy scripts in a "clean" environment
i.e. in a GroovyClassloader that does not have a parent.
Background: One of my OSS projects is an analytics IDE where i want to
enable users to run scripts that only has the dependencies of a gradle
build script and hence i need to separate the IDE classloader from the
one running the script.
However, i have run into an issue with ginq expressions that baffles me.
A complete but minimal example is here:
https://github.com/perNyfelt/groovy-issues/tree/main/NoParentCL but the
issue is basically:
The groovy script is
def numbers = [0, 1, 2] println "Numbers are $numbers" var result = GQ {
from n in numbers where n > 0 select n } println "Ginq result is $result"
After creating the GroovyClassloader i add the following files to the
classpath: groovy-4.0.26.jar, groovy-ginq-4.0.26.jar,
groovy-macro-4.0.26.jar
When is do
new GroovyShell(new GroovyClassloader()).evaluate(script)
everything works fine but if i do
new GroovyShell(new GroovyClassloader((Classloader)null).evaluate(script)
I get
Exception in thread "main" groovy.lang.MissingMethodException: No
signature of method: Script1.GQ() is applicable for argument types:
(Script1$_run_closure1) values: [Script1$_run_closure1@5cb5bb88]
Possible solutions: is(java.lang.Object), run(), run(), any(), grep(),
any(groovy.lang.Closure)
at
org.codehaus.groovy.runtime.ScriptBytecodeAdapter.unwrap(ScriptBytecodeAdapter.java:72)
at
org.codehaus.groovy.vmplugin.v8.IndyGuardsFiltersAndSignatures.unwrap(IndyGuardsFiltersAndSignatures.java:163)
at
org.codehaus.groovy.vmplugin.v8.IndyInterface.fromCache(IndyInterface.java:321)
at Script1.run(Script1.groovy:3)
at
java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)
at java.base/java.lang.reflect.Method.invoke(Method.java:580)
at
org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:343)
at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:328)
at
groovy.lang.MetaClassImpl.doInvokeMethod(MetaClassImpl.java:1333)
at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1088)
at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1007)
at
org.codehaus.groovy.runtime.InvokerHelper.invokePojoMethod(InvokerHelper.java:633)
at
org.codehaus.groovy.runtime.InvokerHelper.invokeMethod(InvokerHelper.java:624)
at
org.codehaus.groovy.runtime.InvokerHelper$1.run(InvokerHelper.java:461)
at groovy.lang.GroovyShell.evaluate(GroovyShell.java:460)
at groovy.lang.GroovyShell.evaluate(GroovyShell.java:495)
at groovy.lang.GroovyShell.evaluate(GroovyShell.java:469)
at RunScript.runScript(RunScript.java:37)
at RunScript.main(RunScript.java:18)
Does anyone know why that would be the case and/or a possible workaround?
Regards,
Per
