com.yammer.metrics.core
Class VirtualMachineMBeans

java.lang.Object
  com.yammer.metrics.core.VirtualMachineMBeans

public class VirtualMachineMBeans
extends Object

A collection of Java Virtual Machine metrics.

Field Summary

private List<GarbageCollectorMXBean>	garbageCollectors
private static VirtualMachineMBeans	INSTANCE
private static int	MAX_STACK_TRACE_DEPTH
private MBeanServer	mBeanServer
private MemoryMXBean	memory
private List<MemoryPoolMXBean>	memoryPools
private OperatingSystemMXBean	os
private RuntimeMXBean	runtime
private ThreadMXBean	threads

Constructor Summary

VirtualMachineMBeans(MemoryMXBean memory, List<MemoryPoolMXBean> memoryPools, OperatingSystemMXBean os, ThreadMXBean threads, List<GarbageCollectorMXBean> garbageCollectors, RuntimeMXBean runtime, MBeanServer mBeanServer)

Method Summary

Set<String>	getDeadlockedThreads() Returns a set of strings describing deadlocked threads, if any are deadlocked.
List<GarbageCollectorMXBean>	getGarbageCollectors()
static VirtualMachineMBeans	getInstance() The default instance of VirtualMachineMBeans.
MBeanServer	getMBeanServer()
MemoryMXBean	getMemory()
List<MemoryPoolMXBean>	getMemoryPools()
String	getName() Returns the name of the currently-running jvm.
OperatingSystemMXBean	getOs()
RuntimeMXBean	getRuntime()
void	getThreadDump(OutputStream out) Dumps all of the threads' current information to an output stream.
ThreadMXBean	getThreads()
String	getVersion() Returns the version of the currently-running jvm.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

MAX_STACK_TRACE_DEPTH

private static final int MAX_STACK_TRACE_DEPTH

See Also:

Constant Field Values

INSTANCE

private static final VirtualMachineMBeans INSTANCE

memory

private final MemoryMXBean memory

memoryPools

private final List<MemoryPoolMXBean> memoryPools

os

private final OperatingSystemMXBean os

threads

private final ThreadMXBean threads

garbageCollectors

private final List<GarbageCollectorMXBean> garbageCollectors

runtime

private final RuntimeMXBean runtime

mBeanServer

private final MBeanServer mBeanServer

Constructor Detail

VirtualMachineMBeans

VirtualMachineMBeans(MemoryMXBean memory,
                     List<MemoryPoolMXBean> memoryPools,
                     OperatingSystemMXBean os,
                     ThreadMXBean threads,
                     List<GarbageCollectorMXBean> garbageCollectors,
                     RuntimeMXBean runtime,
                     MBeanServer mBeanServer)

Method Detail

getInstance

public static VirtualMachineMBeans getInstance()

The default instance of VirtualMachineMBeans.

Returns:

the default instance

getMemory

public MemoryMXBean getMemory()

getMemoryPools

public List<MemoryPoolMXBean> getMemoryPools()

getOs

public OperatingSystemMXBean getOs()

getThreads

public ThreadMXBean getThreads()

getGarbageCollectors

public List<GarbageCollectorMXBean> getGarbageCollectors()

getRuntime

public RuntimeMXBean getRuntime()

getMBeanServer

public MBeanServer getMBeanServer()

getVersion

public String getVersion()

Returns the version of the currently-running jvm.

Returns:

the version of the currently-running jvm, eg "1.6.0_24"

See Also:

J2SE SDK/JRE Version String Naming Convention

getName

public String getName()

Returns the name of the currently-running jvm.

Returns:

the name of the currently-running jvm, eg "Java HotSpot(TM) Client VM"

See Also:

System.getProperties()

getDeadlockedThreads

public Set<String> getDeadlockedThreads()

Returns a set of strings describing deadlocked threads, if any are deadlocked.

Returns:

a set of any deadlocked threads

getThreadDump

public void getThreadDump(OutputStream out)

Dumps all of the threads' current information to an output stream.

Parameters:

out - an output stream