[jboss-jira] [JBoss JIRA] (DROOLS-5345) Class loading issue in Eclipse Equinox OSGi container
[
https://issues.redhat.com/browse/DROOLS-5345?page=com.atlassian.jira.plug...
]
Richard Schurig updated DROOLS-5345:
------------------------------------
Description:
When using Drools inside an *Equinox* OSGi container (Oxygen,
org.eclipse.osgi-3.12.0.v20170512-1932.jar) the logic inside
{{org.drools.relective.classloader.ProjectClassLoader#isOsgiClassLoader}} does not work
properly, i.e. the OSGi runtime is not detected. This leads to "The Eclipse JDT Core
jar is not in the classpath" because the shaded and packed compiler classes cannot be
found.
Cause of the problem seems to be the fact that the {{EquinoxClassLoader}} does not
implement {{BundleReference}} directly *but so does its superclass*. I tried and patched
{{ProjectClassLoader}} with the following snippet and this seems to work:
{code:java}
private static boolean isOsgiClassLoader(final ClassLoader cl) {
Class<?> clc = cl.getClass();
while (clc != null && !clc.equals(ClassLoader.class)) {
if (Stream.of(clc.getInterfaces()).map(Class::getSimpleName).anyMatch(name ->
name.equals("BundleReference"))) {
return true;
}
clc = clc.getSuperclass();
}
return false;
}
{code}
was:
When using Drools inside an *Equinox* OSGi container (Oxygen,
org.eclipse.osgi-3.12.0.v20170512-1932.jar) the logic inside
`org.drools.relective.classloader.ProjectClassLoader#isOsgiClassLoader` does not work
properly, i.e. the OSGi runtime is not detected. This leads to "The Eclipse JDT Core
jar is not in the classpath" because the shaded and packed compiler classes cannot be
found.
Cause of the problem seems to be the fact that the `EquinoxClassLoader`does not implement
`BundleReference` directly *but so does its superclass*. I tried and patched
`ProjectClassLoader` with the following snippet and this seems to work:
{code:java}
private static boolean isOsgiClassLoader(final ClassLoader cl) {
Class<?> clc = cl.getClass();
while (clc != null && !clc.equals(ClassLoader.class)) {
if (Stream.of(clc.getInterfaces()).map(Class::getSimpleName).anyMatch(name ->
name.equals("BundleReference"))) {
return true;
}
clc = clc.getSuperclass();
}
return false;
}
{code}
Class loading issue in Eclipse Equinox OSGi container
-----------------------------------------------------
Key: DROOLS-5345
URL: https://issues.redhat.com/browse/DROOLS-5345
Project: Drools
Issue Type: Bug
Components: core engine
Affects Versions: 7.37.0.Final
Reporter: Richard Schurig
Assignee: Mario Fusco
Priority: Major
When using Drools inside an *Equinox* OSGi container (Oxygen,
org.eclipse.osgi-3.12.0.v20170512-1932.jar) the logic inside
{{org.drools.relective.classloader.ProjectClassLoader#isOsgiClassLoader}} does not work
properly, i.e. the OSGi runtime is not detected. This leads to "The Eclipse JDT Core
jar is not in the classpath" because the shaded and packed compiler classes cannot be
found.
Cause of the problem seems to be the fact that the {{EquinoxClassLoader}} does not
implement {{BundleReference}} directly *but so does its superclass*. I tried and patched
{{ProjectClassLoader}} with the following snippet and this seems to work:
{code:java}
private static boolean isOsgiClassLoader(final ClassLoader cl) {
Class<?> clc = cl.getClass();
while (clc != null && !clc.equals(ClassLoader.class)) {
if (Stream.of(clc.getInterfaces()).map(Class::getSimpleName).anyMatch(name ->
name.equals("BundleReference"))) {
return true;
}
clc = clc.getSuperclass();
}
return false;
}
{code}
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