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Peergreen MBeans Commands

Ease MBeanServer (platform's default one) manipulation:

  • Browse MBeans
  • List domains
  • Display MBean's structure (MBeanInfo)
  • Display MBeans's attribute's values

Installation

Install with the following command:

start mvn:com.peergreen.shelbie/mbeans-commands/1.0.0-SNAPSHOT

Commands

mbeans:list-objectnames

List registered ObjectNames.

No arguments

All ObjectNames are returned

guillaume@peergreen-platform$ mbeans:list-objectnames
  java.lang:name=PS Eden Space,type=MemoryPool
  java.lang:type=Memory
  org.eclipse.equinox.region.domain:frameworkUUID=80edf5e9-bd8d-0012-1d07-a5591531df55,name=org.eclipse.equinox.region.kernel,type=Region
  java.lang:name=PS Survivor Space,type=MemoryPool
  org.eclipse.equinox.region.domain:frameworkUUID=80edf5e9-bd8d-0012-1d07-a5591531df55,type=RegionDigraph
  java.lang:name=Code Cache,type=MemoryPool
  java.lang:name=PS MarkSweep,type=GarbageCollector
  java.lang:type=Runtime
  java.nio:name=direct,type=BufferPool
  java.lang:type=ClassLoading
  java.lang:type=Threading
  java.nio:name=mapped,type=BufferPool
  java.util.logging:type=Logging
  java.lang:type=Compilation
  com.sun.management:type=HotSpotDiagnostic
  java.lang:name=PS Perm Gen,type=MemoryPool
  java.lang:type=OperatingSystem
  java.lang:name=PS Scavenge,type=GarbageCollector
  java.lang:name=PS Old Gen,type=MemoryPool
  JMImplementation:type=MBeanServerDelegate
  java.lang:name=CodeCacheManager,type=MemoryManager

With ObjectName pattern as argument

Only ObjectNames matching the given pattern are returned.

guillaume@peergreen-platform$ mbeans:list-objectnames java.lang:*
  java.lang:type=Compilation
  java.lang:type=Memory
  java.lang:name=PS Eden Space,type=MemoryPool
  java.lang:name=PS Survivor Space,type=MemoryPool
  java.lang:name=Code Cache,type=MemoryPool
  java.lang:name=PS MarkSweep,type=GarbageCollector
  java.lang:type=Runtime
  java.lang:name=PS Perm Gen,type=MemoryPool
  java.lang:type=ClassLoading
  java.lang:name=PS Scavenge,type=GarbageCollector
  java.lang:type=OperatingSystem
  java.lang:type=Threading
  java.lang:name=PS Old Gen,type=MemoryPool
  java.lang:name=CodeCacheManager,type=MemoryManager

mbeans:list-domains

List MBean's domain.

guillaume@peergreen-platform$ mbeans:list-domains
  java.nio (2 MBeans)
  JMImplementation (1 MBeans)
  com.sun.management (1 MBeans)
  java.lang (14 MBeans)
  java.util.logging (1 MBeans)
  org.eclipse.equinox.region.domain (2 MBeans)

mbeans:mbean-info

Display informations about a given MBean (ObjectName provided as argument).

guillaume@peergreen-platform$ mbeans:mbean-info java.lang:type=Memory
----------------------------------------------------
java.lang:type=Memory (sun.management.MemoryImpl)
  Information on the management interface of the MBean
----------------------------------------------------
Attributes:
  * ObjectPendingFinalizationCount [R-] int                                      ObjectPendingFinalizationCount
  * HeapMemoryUsage                [R-] javax.management.openmbean.CompositeData HeapMemoryUsage
  * NonHeapMemoryUsage             [R-] javax.management.openmbean.CompositeData NonHeapMemoryUsage
  * Verbose                        [RW] boolean                                  Verbose
  * ObjectName                     [R-] javax.management.ObjectName              ObjectName
Operations:
  * gc():void gc
Notifications:
  * javax.management.Notification Memory Notification
    + java.management.memory.threshold.exceeded
    + java.management.memory.collection.threshold.exceeded

mbeans:get-attributes

Display attribute's value of a given MBean (ObjectName provided as argument).

guillaume@peergreen-platform$ mbeans:get-attributes java.lang:type=Memory
  ObjectPendingFinalizationCount 0
  HeapMemoryUsage Composite{committed=149356544, init=134069376, max=1907032064, used=36066056}
  NonHeapMemoryUsage Composite{committed=25493504, init=24313856, max=136314880, used=25323952}
  Verbose false
  ObjectName java.lang:type=Memory

Notice that CompositeDate and simple value types are supported (no support yet for TabularData for example).