Accès à une GarbageCollectorMXBean à distance

Question

je peux accéder à d'autres types MXBean, comme le RuntimeMXBean, mais pas le GarabageCollectorMXBean:

JMXConnector connector = JMXConnectorFactory.connect(new JMXServiceURL("service:jmx:rmi:///jndi/rmi://coretest:1542/jmxrmi")); 
MBeanServerConnection mbs = connector.getMBeanServerConnection(); 
GarbageCollectorMXBean gc = ManagementFactory.newPlatformMXBeanProxy(mbs, ManagementFactory.GARBAGE_COLLECTOR_MXBEAN_DOMAIN_TYPE, GarbageCollectorMXBean.class); 

et le résultat est

Exception in thread "main" java.lang.IllegalArgumentException: java.lang:type=GarbageCollector not found in the connection. 
at java.lang.management.ManagementFactory.newPlatformMXBeanProxy(ManagementFactory.java:629) 
at jmx.JMXConnectorSample.main(JMXConnectorSample.java:32) 
Caused by: javax.management.InstanceNotFoundException: java.lang:type=GarbageCollector 
at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.getMBean(DefaultMBeanServerInterceptor.java:1094) 
at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.isInstanceOf(DefaultMBeanServerInterceptor.java:1398) 
at com.sun.jmx.mbeanserver.JmxMBeanServer.isInstanceOf(JmxMBeanServer.java:1051) 
at javax.management.remote.rmi.RMIConnectionImpl.doOperation(RMIConnectionImpl.java:1432) 
at javax.management.remote.rmi.RMIConnectionImpl.access$200(RMIConnectionImpl.java:72) 
at javax.management.remote.rmi.RMIConnectionImpl$PrivilegedOperation.run(RMIConnectionImpl.java:1264) 
at javax.management.remote.rmi.RMIConnectionImpl.doPrivilegedOperation(RMIConnectionImpl.java:1359) 
at javax.management.remote.rmi.RMIConnectionImpl.isInstanceOf(RMIConnectionImpl.java:898) 
at sun.reflect.GeneratedMethodAccessor91.invoke(Unknown Source) 
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) 
at java.lang.reflect.Method.invoke(Method.java:597) 
at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:305) 
at sun.rmi.transport.Transport$1.run(Transport.java:159) 
at java.security.AccessController.doPrivileged(Native Method) 
at sun.rmi.transport.Transport.serviceCall(Transport.java:155) 
at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:535) 
at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(TCPTransport.java:790) 
at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:649) 
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:885) 
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:907) 
at java.lang.Thread.run(Thread.java:619) 
at sun.rmi.transport.StreamRemoteCall.exceptionReceivedFromServer(StreamRemoteCall.java:255) 
at sun.rmi.transport.StreamRemoteCall.executeCall(StreamRemoteCall.java:233) 
at sun.rmi.server.UnicastRef.invoke(UnicastRef.java:142) 
at com.sun.jmx.remote.internal.PRef.invoke(Unknown Source) 
at javax.management.remote.rmi.RMIConnectionImpl_Stub.isInstanceOf(Unknown Source) 
at javax.management.remote.rmi.RMIConnector$RemoteMBeanServerConnection.isInstanceOf(RMIConnector.java:1073) 
at java.lang.management.ManagementFactory.newPlatformMXBeanProxy(ManagementFactory.java:616) 
... 1 more 

Cela peut être parce qu'il ya plusieurs GarbageCollectorMXBean s disponible, mais je ne trouve aucune autre méthode pertinente sur ManagementFactory pour accéder à plusieurs beans distants.

Answer 1

En fait, je devais d'abord interroger:

ObjectName gcName = new ObjectName(ManagementFactory.GARBAGE_COLLECTOR_MXBEAN_DOMAIN_TYPE + ",*"); 

for (ObjectName name : mbs.queryNames(gcName, null)) { 
    GarbageCollectorMXBean gc = ManagementFactory.newPlatformMXBeanProxy(mbs, name.getCanonicalName(), GarbageCollectorMXBean.class);    
    System.out.println(gc.getName());    
}