How to register logback JMXConfigurator to WebSphere custom MBeanServer? - websphere

Question

I tried to put <jmxConfigurator/> in logback configuration file. I am able to connect jconsole to local JVM running unit tests and interact with the logback mbean. However, when I deploy my web application to a remote Websphere application server and connect jconsole to that remote JVM, I can't see the logback mbean in the MBeans panel.
As a comparison, the web application is built with spring boot, which also register some MBeans by default. I can see MBeans of spring boot in both scenarios.
I investigated a bit further and found out logback always get MBeanServer instance from ManagementFactory.getPlatformMBeanServer(), while spring uses different approaches in Websphere/Weblogic environment.
It appears that in Websphere environment, the MBeanServer instance exposed for remote connection is NOT the default PlatformMBeanServer.
So the question is, how can I register the logback mbean to the WebSphere custom MBeanServer, rather than the default PlatformMBeanServer?
WebSphere custom MBeanServer is favoured because it is better integrated with security and clustering capabilities.

Answer 1

This is my workaround by extending JMXConfigurator.
Just for the record, there is no document endorsing such extension, and I didn't test it with multiple web-applications.
This class inherited most behaviors from JMXConfigurator, but it will register to / unregister from the MBeanServer that is injected by Spring.
#ManagedResource(objectName = AnnotatedJMXConfigurator.NAME, description = "Logback Configuration Management Bean")
#Component
public class AnnotatedJMXConfigurator extends JMXConfigurator {
public static final String NAME = "xxx.ch.qos.logback.classic:Name=default,Type=ch.qos.logback.classic.jmx.JMXConfigurator";
private static final LoggerContext CONTEXT = (LoggerContext) LoggerFactory.getILoggerFactory();
private static final ObjectName OBJECT_NAME;
static {
try {
OBJECT_NAME = new ObjectName(NAME);
} catch (MalformedObjectNameException e) {
throw new RuntimeException(e.getMessage(), e);
}
}
#Autowired
public AnnotatedJMXConfigurator(MBeanServer mbs) {
super(CONTEXT, mbs, OBJECT_NAME);
}
}