jdk-sandbox: jdk/src/share/classes/java/lang/management/package.html@8435a30053c1 (annotated)

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90ce3da70b43 Initial load duke parents: diff changeset	25
90ce3da70b43 Initial load duke parents: diff changeset	26	<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN">
90ce3da70b43 Initial load duke parents: diff changeset	27	<html>
90ce3da70b43 Initial load duke parents: diff changeset	28	<body bgcolor="white">
90ce3da70b43 Initial load duke parents: diff changeset	29
9013 eedac0b9f552 7024172: Move BufferPoolMXBean and PlatformLoggingMXBean java.lang.management mchung parents: 5506 diff changeset	30	Provides the management interfaces for monitoring and management of the
eedac0b9f552 7024172: Move BufferPoolMXBean and PlatformLoggingMXBean java.lang.management mchung parents: 5506 diff changeset	31	Java virtual machine and other components in the Java runtime.
eedac0b9f552 7024172: Move BufferPoolMXBean and PlatformLoggingMXBean java.lang.management mchung parents: 5506 diff changeset	32	It allows both local and remote
eedac0b9f552 7024172: Move BufferPoolMXBean and PlatformLoggingMXBean java.lang.management mchung parents: 5506 diff changeset	33	monitoring and management of the running Java virtual machine.
eedac0b9f552 7024172: Move BufferPoolMXBean and PlatformLoggingMXBean java.lang.management mchung parents: 5506 diff changeset	34	<p>
2 90ce3da70b43 Initial load duke parents: diff changeset	35
9013 eedac0b9f552 7024172: Move BufferPoolMXBean and PlatformLoggingMXBean java.lang.management mchung parents: 5506 diff changeset	36	<h4><a name="MXBean">Platform MXBean</a></h4>
2 90ce3da70b43 Initial load duke parents: diff changeset	37	<p>
9013 eedac0b9f552 7024172: Move BufferPoolMXBean and PlatformLoggingMXBean java.lang.management mchung parents: 5506 diff changeset	38	A platform MXBean is a <i>managed bean</i> that
eedac0b9f552 7024172: Move BufferPoolMXBean and PlatformLoggingMXBean java.lang.management mchung parents: 5506 diff changeset	39	conforms to the <a href="../../../javax/management/package-summary.html">JMX</a>
eedac0b9f552 7024172: Move BufferPoolMXBean and PlatformLoggingMXBean java.lang.management mchung parents: 5506 diff changeset	40	Instrumentation Specification and only uses a set of basic data types.
eedac0b9f552 7024172: Move BufferPoolMXBean and PlatformLoggingMXBean java.lang.management mchung parents: 5506 diff changeset	41	Each platform MXBean is a {@link java.lang.management.PlatformManagedObject}
eedac0b9f552 7024172: Move BufferPoolMXBean and PlatformLoggingMXBean java.lang.management mchung parents: 5506 diff changeset	42	with a unique
eedac0b9f552 7024172: Move BufferPoolMXBean and PlatformLoggingMXBean java.lang.management mchung parents: 5506 diff changeset	43	{@linkplain java.lang.management.PlatformManagedObject#getObjectName name}.
eedac0b9f552 7024172: Move BufferPoolMXBean and PlatformLoggingMXBean java.lang.management mchung parents: 5506 diff changeset	44	<p>
2 90ce3da70b43 Initial load duke parents: diff changeset	45	<h4>ManagementFactory</h4>
90ce3da70b43 Initial load duke parents: diff changeset	46
9013 eedac0b9f552 7024172: Move BufferPoolMXBean and PlatformLoggingMXBean java.lang.management mchung parents: 5506 diff changeset	47	<p>The {@link java.lang.management.ManagementFactory} class is the management
eedac0b9f552 7024172: Move BufferPoolMXBean and PlatformLoggingMXBean java.lang.management mchung parents: 5506 diff changeset	48	factory class for the Java platform. This class provides a set of
2 90ce3da70b43 Initial load duke parents: diff changeset	49	static factory methods to obtain the MXBeans for the Java platform
90ce3da70b43 Initial load duke parents: diff changeset	50	to allow an application to access the MXBeans directly.
90ce3da70b43 Initial load duke parents: diff changeset	51
90ce3da70b43 Initial load duke parents: diff changeset	52	<p>A <em>platform MBeanServer</em> can be accessed with the
90ce3da70b43 Initial load duke parents: diff changeset	53	{@link java.lang.management.ManagementFactory#getPlatformMBeanServer
90ce3da70b43 Initial load duke parents: diff changeset	54	getPlatformMBeanServer} method. On the first call to this method,
9013 eedac0b9f552 7024172: Move BufferPoolMXBean and PlatformLoggingMXBean java.lang.management mchung parents: 5506 diff changeset	55	it creates the platform MBeanServer and registers all platform MXBeans
eedac0b9f552 7024172: Move BufferPoolMXBean and PlatformLoggingMXBean java.lang.management mchung parents: 5506 diff changeset	56	including {@linkplain java.lang.management.PlatformManagedObject
eedac0b9f552 7024172: Move BufferPoolMXBean and PlatformLoggingMXBean java.lang.management mchung parents: 5506 diff changeset	57	platform MXBeans}.
eedac0b9f552 7024172: Move BufferPoolMXBean and PlatformLoggingMXBean java.lang.management mchung parents: 5506 diff changeset	58	Each platform MXBean is registered with a unique name defined in
eedac0b9f552 7024172: Move BufferPoolMXBean and PlatformLoggingMXBean java.lang.management mchung parents: 5506 diff changeset	59	the specification of the management interface.
eedac0b9f552 7024172: Move BufferPoolMXBean and PlatformLoggingMXBean java.lang.management mchung parents: 5506 diff changeset	60	This is a single MBeanServer that can be shared by different managed
2 90ce3da70b43 Initial load duke parents: diff changeset	61	components running within the same Java virtual machine.
9013 eedac0b9f552 7024172: Move BufferPoolMXBean and PlatformLoggingMXBean java.lang.management mchung parents: 5506 diff changeset	62
2 90ce3da70b43 Initial load duke parents: diff changeset	63	<h4>Interoperability</h4>
90ce3da70b43 Initial load duke parents: diff changeset	64
9013 eedac0b9f552 7024172: Move BufferPoolMXBean and PlatformLoggingMXBean java.lang.management mchung parents: 5506 diff changeset	65	<p>A management application and a platform MBeanServer of a running
eedac0b9f552 7024172: Move BufferPoolMXBean and PlatformLoggingMXBean java.lang.management mchung parents: 5506 diff changeset	66	virtual machine can interoperate
2 90ce3da70b43 Initial load duke parents: diff changeset	67	without requiring classes used by the platform MXBean interfaces.
90ce3da70b43 Initial load duke parents: diff changeset	68	The data types being transmitted between the JMX connector
90ce3da70b43 Initial load duke parents: diff changeset	69	server and the connector client are JMX
9013 eedac0b9f552 7024172: Move BufferPoolMXBean and PlatformLoggingMXBean java.lang.management mchung parents: 5506 diff changeset	70	{@linkplain javax.management.openmbean.OpenType open types} and
2 90ce3da70b43 Initial load duke parents: diff changeset	71	this allows interoperation across versions.
9013 eedac0b9f552 7024172: Move BufferPoolMXBean and PlatformLoggingMXBean java.lang.management mchung parents: 5506 diff changeset	72	A data type used by the MXBean interfaces are mapped to an
eedac0b9f552 7024172: Move BufferPoolMXBean and PlatformLoggingMXBean java.lang.management mchung parents: 5506 diff changeset	73	open type when being accessed via MBeanServer interface.
eedac0b9f552 7024172: Move BufferPoolMXBean and PlatformLoggingMXBean java.lang.management mchung parents: 5506 diff changeset	74	See the <a href="../../../javax/management/MXBean.html#MXBean-spec">
eedac0b9f552 7024172: Move BufferPoolMXBean and PlatformLoggingMXBean java.lang.management mchung parents: 5506 diff changeset	75	MXBean</a> specification for details.
2 90ce3da70b43 Initial load duke parents: diff changeset	76
90ce3da70b43 Initial load duke parents: diff changeset	77	<h4><a name="examples">Ways to Access MXBeans</a></h4>
90ce3da70b43 Initial load duke parents: diff changeset	78
9013 eedac0b9f552 7024172: Move BufferPoolMXBean and PlatformLoggingMXBean java.lang.management mchung parents: 5506 diff changeset	79	<p>An application can monitor the instrumentation of the
eedac0b9f552 7024172: Move BufferPoolMXBean and PlatformLoggingMXBean java.lang.management mchung parents: 5506 diff changeset	80	Java virtual machine and the runtime in the following ways:
2 90ce3da70b43 Initial load duke parents: diff changeset	81	<p>
9013 eedac0b9f552 7024172: Move BufferPoolMXBean and PlatformLoggingMXBean java.lang.management mchung parents: 5506 diff changeset	82	<b>1. Direct access to an MXBean interface</b>
eedac0b9f552 7024172: Move BufferPoolMXBean and PlatformLoggingMXBean java.lang.management mchung parents: 5506 diff changeset	83	<p>
eedac0b9f552 7024172: Move BufferPoolMXBean and PlatformLoggingMXBean java.lang.management mchung parents: 5506 diff changeset	84	<ul>
eedac0b9f552 7024172: Move BufferPoolMXBean and PlatformLoggingMXBean java.lang.management mchung parents: 5506 diff changeset	85	<li>Get an MXBean instance locally in the running Java virtual machine:<p>
eedac0b9f552 7024172: Move BufferPoolMXBean and PlatformLoggingMXBean java.lang.management mchung parents: 5506 diff changeset	86	<pre>
2 90ce3da70b43 Initial load duke parents: diff changeset	87	RuntimeMXBean mxbean = ManagementFactory.getRuntimeMXBean();
90ce3da70b43 Initial load duke parents: diff changeset	88
90ce3da70b43 Initial load duke parents: diff changeset	89	// Get the standard attribute "VmVendor"
90ce3da70b43 Initial load duke parents: diff changeset	90	String vendor = mxbean.getVmVendor();
90ce3da70b43 Initial load duke parents: diff changeset	91	</pre>
9013 eedac0b9f552 7024172: Move BufferPoolMXBean and PlatformLoggingMXBean java.lang.management mchung parents: 5506 diff changeset	92	<p>Or by calling the
eedac0b9f552 7024172: Move BufferPoolMXBean and PlatformLoggingMXBean java.lang.management mchung parents: 5506 diff changeset	93	{@link java.lang.management.ManagementFactory#getPlatformMXBean(Class)
eedac0b9f552 7024172: Move BufferPoolMXBean and PlatformLoggingMXBean java.lang.management mchung parents: 5506 diff changeset	94	getPlatformMXBean} or
eedac0b9f552 7024172: Move BufferPoolMXBean and PlatformLoggingMXBean java.lang.management mchung parents: 5506 diff changeset	95	{@link java.lang.management.ManagementFactory#getPlatformMXBeans(Class)
eedac0b9f552 7024172: Move BufferPoolMXBean and PlatformLoggingMXBean java.lang.management mchung parents: 5506 diff changeset	96	getPlatformMXBeans} method:
eedac0b9f552 7024172: Move BufferPoolMXBean and PlatformLoggingMXBean java.lang.management mchung parents: 5506 diff changeset	97	<pre>
eedac0b9f552 7024172: Move BufferPoolMXBean and PlatformLoggingMXBean java.lang.management mchung parents: 5506 diff changeset	98	RuntimeMXBean mxbean = ManagementFactory.getPlatformMXBean(RuntimeMXBean.class);
eedac0b9f552 7024172: Move BufferPoolMXBean and PlatformLoggingMXBean java.lang.management mchung parents: 5506 diff changeset	99
eedac0b9f552 7024172: Move BufferPoolMXBean and PlatformLoggingMXBean java.lang.management mchung parents: 5506 diff changeset	100	// Get the standard attribute "VmVendor"
eedac0b9f552 7024172: Move BufferPoolMXBean and PlatformLoggingMXBean java.lang.management mchung parents: 5506 diff changeset	101	String vendor = mxbean.getVmVendor();
eedac0b9f552 7024172: Move BufferPoolMXBean and PlatformLoggingMXBean java.lang.management mchung parents: 5506 diff changeset	102	</pre>
eedac0b9f552 7024172: Move BufferPoolMXBean and PlatformLoggingMXBean java.lang.management mchung parents: 5506 diff changeset	103	<p>
2 90ce3da70b43 Initial load duke parents: diff changeset	104	</li>
9013 eedac0b9f552 7024172: Move BufferPoolMXBean and PlatformLoggingMXBean java.lang.management mchung parents: 5506 diff changeset	105	<li>Construct an MXBean proxy instance that forwards the
eedac0b9f552 7024172: Move BufferPoolMXBean and PlatformLoggingMXBean java.lang.management mchung parents: 5506 diff changeset	106	method calls to a given MBeanServer:<p>
eedac0b9f552 7024172: Move BufferPoolMXBean and PlatformLoggingMXBean java.lang.management mchung parents: 5506 diff changeset	107	<pre>
eedac0b9f552 7024172: Move BufferPoolMXBean and PlatformLoggingMXBean java.lang.management mchung parents: 5506 diff changeset	108	MBeanServerConnection mbs;
2 90ce3da70b43 Initial load duke parents: diff changeset	109
9013 eedac0b9f552 7024172: Move BufferPoolMXBean and PlatformLoggingMXBean java.lang.management mchung parents: 5506 diff changeset	110	// Connect to a running JVM (or itself) and get MBeanServerConnection
eedac0b9f552 7024172: Move BufferPoolMXBean and PlatformLoggingMXBean java.lang.management mchung parents: 5506 diff changeset	111	// that has the JVM MBeans registered in it
eedac0b9f552 7024172: Move BufferPoolMXBean and PlatformLoggingMXBean java.lang.management mchung parents: 5506 diff changeset	112	...
eedac0b9f552 7024172: Move BufferPoolMXBean and PlatformLoggingMXBean java.lang.management mchung parents: 5506 diff changeset	113
eedac0b9f552 7024172: Move BufferPoolMXBean and PlatformLoggingMXBean java.lang.management mchung parents: 5506 diff changeset	114	// Get a MBean proxy for RuntimeMXBean interface
eedac0b9f552 7024172: Move BufferPoolMXBean and PlatformLoggingMXBean java.lang.management mchung parents: 5506 diff changeset	115	RuntimeMXBean proxy =
eedac0b9f552 7024172: Move BufferPoolMXBean and PlatformLoggingMXBean java.lang.management mchung parents: 5506 diff changeset	116	{@link java.lang.management.ManagementFactory#getPlatformMXBean(MBeanServerConnection, Class)
eedac0b9f552 7024172: Move BufferPoolMXBean and PlatformLoggingMXBean java.lang.management mchung parents: 5506 diff changeset	117	ManagementFactory.getPlatformMXBean}(mbs,
eedac0b9f552 7024172: Move BufferPoolMXBean and PlatformLoggingMXBean java.lang.management mchung parents: 5506 diff changeset	118	RuntimeMXBean.class);
eedac0b9f552 7024172: Move BufferPoolMXBean and PlatformLoggingMXBean java.lang.management mchung parents: 5506 diff changeset	119	// Get standard attribute "VmVendor"
eedac0b9f552 7024172: Move BufferPoolMXBean and PlatformLoggingMXBean java.lang.management mchung parents: 5506 diff changeset	120	String vendor = proxy.getVmVendor();
eedac0b9f552 7024172: Move BufferPoolMXBean and PlatformLoggingMXBean java.lang.management mchung parents: 5506 diff changeset	121	</pre>
eedac0b9f552 7024172: Move BufferPoolMXBean and PlatformLoggingMXBean java.lang.management mchung parents: 5506 diff changeset	122	<p>A proxy is typically used to access an MXBean
eedac0b9f552 7024172: Move BufferPoolMXBean and PlatformLoggingMXBean java.lang.management mchung parents: 5506 diff changeset	123	in a remote Java virtual machine.
eedac0b9f552 7024172: Move BufferPoolMXBean and PlatformLoggingMXBean java.lang.management mchung parents: 5506 diff changeset	124	An alternative way to create an MXBean proxy is:
eedac0b9f552 7024172: Move BufferPoolMXBean and PlatformLoggingMXBean java.lang.management mchung parents: 5506 diff changeset	125	<pre>
eedac0b9f552 7024172: Move BufferPoolMXBean and PlatformLoggingMXBean java.lang.management mchung parents: 5506 diff changeset	126	RuntimeMXBean proxy =
eedac0b9f552 7024172: Move BufferPoolMXBean and PlatformLoggingMXBean java.lang.management mchung parents: 5506 diff changeset	127	{@link java.lang.management.ManagementFactory#newPlatformMXBeanProxy
eedac0b9f552 7024172: Move BufferPoolMXBean and PlatformLoggingMXBean java.lang.management mchung parents: 5506 diff changeset	128	ManagementFactory.newPlatformMXBeanProxy}(mbs,
eedac0b9f552 7024172: Move BufferPoolMXBean and PlatformLoggingMXBean java.lang.management mchung parents: 5506 diff changeset	129	ManagementFactory.RUNTIME_MXBEAN_NAME,
eedac0b9f552 7024172: Move BufferPoolMXBean and PlatformLoggingMXBean java.lang.management mchung parents: 5506 diff changeset	130	RuntimeMXBean.class);
eedac0b9f552 7024172: Move BufferPoolMXBean and PlatformLoggingMXBean java.lang.management mchung parents: 5506 diff changeset	131	</pre>
eedac0b9f552 7024172: Move BufferPoolMXBean and PlatformLoggingMXBean java.lang.management mchung parents: 5506 diff changeset	132	</li>
eedac0b9f552 7024172: Move BufferPoolMXBean and PlatformLoggingMXBean java.lang.management mchung parents: 5506 diff changeset	133	</ul>
eedac0b9f552 7024172: Move BufferPoolMXBean and PlatformLoggingMXBean java.lang.management mchung parents: 5506 diff changeset	134	<p>
eedac0b9f552 7024172: Move BufferPoolMXBean and PlatformLoggingMXBean java.lang.management mchung parents: 5506 diff changeset	135	<b>2. Indirect access to an MXBean interface via MBeanServer</b><p>
eedac0b9f552 7024172: Move BufferPoolMXBean and PlatformLoggingMXBean java.lang.management mchung parents: 5506 diff changeset	136	<ul>
eedac0b9f552 7024172: Move BufferPoolMXBean and PlatformLoggingMXBean java.lang.management mchung parents: 5506 diff changeset	137	<li>Go through the
eedac0b9f552 7024172: Move BufferPoolMXBean and PlatformLoggingMXBean java.lang.management mchung parents: 5506 diff changeset	138	{@link java.lang.management.ManagementFactory#getPlatformMBeanServer
eedac0b9f552 7024172: Move BufferPoolMXBean and PlatformLoggingMXBean java.lang.management mchung parents: 5506 diff changeset	139	platform MBeanServer} to access MXBeans locally or
eedac0b9f552 7024172: Move BufferPoolMXBean and PlatformLoggingMXBean java.lang.management mchung parents: 5506 diff changeset	140	a specific {@code MBeanServerConnection} to access
eedac0b9f552 7024172: Move BufferPoolMXBean and PlatformLoggingMXBean java.lang.management mchung parents: 5506 diff changeset	141	MXBeans remotely.
eedac0b9f552 7024172: Move BufferPoolMXBean and PlatformLoggingMXBean java.lang.management mchung parents: 5506 diff changeset	142	The attributes and operations of an MXBean use only
eedac0b9f552 7024172: Move BufferPoolMXBean and PlatformLoggingMXBean java.lang.management mchung parents: 5506 diff changeset	143	<em>JMX open types</em> which include basic data types,
eedac0b9f552 7024172: Move BufferPoolMXBean and PlatformLoggingMXBean java.lang.management mchung parents: 5506 diff changeset	144	{@link javax.management.openmbean.CompositeData CompositeData},
eedac0b9f552 7024172: Move BufferPoolMXBean and PlatformLoggingMXBean java.lang.management mchung parents: 5506 diff changeset	145	and {@link javax.management.openmbean.TabularData TabularData}
eedac0b9f552 7024172: Move BufferPoolMXBean and PlatformLoggingMXBean java.lang.management mchung parents: 5506 diff changeset	146	defined in {@link javax.management.openmbean.OpenType OpenType}.<p>
eedac0b9f552 7024172: Move BufferPoolMXBean and PlatformLoggingMXBean java.lang.management mchung parents: 5506 diff changeset	147	<pre>
2 90ce3da70b43 Initial load duke parents: diff changeset	148	MBeanServerConnection mbs;
90ce3da70b43 Initial load duke parents: diff changeset	149
90ce3da70b43 Initial load duke parents: diff changeset	150	// Connect to a running JVM (or itself) and get MBeanServerConnection
90ce3da70b43 Initial load duke parents: diff changeset	151	// that has the JVM MXBeans registered in it
90ce3da70b43 Initial load duke parents: diff changeset	152	...
90ce3da70b43 Initial load duke parents: diff changeset	153
90ce3da70b43 Initial load duke parents: diff changeset	154	try {
90ce3da70b43 Initial load duke parents: diff changeset	155	// Assuming the RuntimeMXBean has been registered in mbs
90ce3da70b43 Initial load duke parents: diff changeset	156	ObjectName oname = new ObjectName(ManagementFactory.RUNTIME_MXBEAN_NAME);
9013 eedac0b9f552 7024172: Move BufferPoolMXBean and PlatformLoggingMXBean java.lang.management mchung parents: 5506 diff changeset	157
2 90ce3da70b43 Initial load duke parents: diff changeset	158	// Get standard attribute "VmVendor"
90ce3da70b43 Initial load duke parents: diff changeset	159	String vendor = (String) mbs.getAttribute(oname, "VmVendor");
90ce3da70b43 Initial load duke parents: diff changeset	160	} catch (....) {
90ce3da70b43 Initial load duke parents: diff changeset	161	// Catch the exceptions thrown by ObjectName constructor
90ce3da70b43 Initial load duke parents: diff changeset	162	// and MBeanServer.getAttribute method
90ce3da70b43 Initial load duke parents: diff changeset	163	...
90ce3da70b43 Initial load duke parents: diff changeset	164	}
9013 eedac0b9f552 7024172: Move BufferPoolMXBean and PlatformLoggingMXBean java.lang.management mchung parents: 5506 diff changeset	165	</pre>
eedac0b9f552 7024172: Move BufferPoolMXBean and PlatformLoggingMXBean java.lang.management mchung parents: 5506 diff changeset	166	</li>
eedac0b9f552 7024172: Move BufferPoolMXBean and PlatformLoggingMXBean java.lang.management mchung parents: 5506 diff changeset	167	</ul>
2 90ce3da70b43 Initial load duke parents: diff changeset	168
90ce3da70b43 Initial load duke parents: diff changeset	169
90ce3da70b43 Initial load duke parents: diff changeset	170	<h4><a name="extension">Platform Extension</a></h4>
90ce3da70b43 Initial load duke parents: diff changeset	171
9013 eedac0b9f552 7024172: Move BufferPoolMXBean and PlatformLoggingMXBean java.lang.management mchung parents: 5506 diff changeset	172	<p>A Java virtual machine implementation may add its platform extension to
2 90ce3da70b43 Initial load duke parents: diff changeset	173	the management interface by defining platform-dependent
90ce3da70b43 Initial load duke parents: diff changeset	174	interfaces that extend the standard management interfaces to include
9013 eedac0b9f552 7024172: Move BufferPoolMXBean and PlatformLoggingMXBean java.lang.management mchung parents: 5506 diff changeset	175	platform-specific metrics and management operations.
2 90ce3da70b43 Initial load duke parents: diff changeset	176	The static factory methods in the <tt>ManagementFactory</tt> class will
9013 eedac0b9f552 7024172: Move BufferPoolMXBean and PlatformLoggingMXBean java.lang.management mchung parents: 5506 diff changeset	177	return the MXBeans with the platform extension.
2 90ce3da70b43 Initial load duke parents: diff changeset	178
90ce3da70b43 Initial load duke parents: diff changeset	179	<p>
90ce3da70b43 Initial load duke parents: diff changeset	180	It is recommended to name the platform-specific attributes with
90ce3da70b43 Initial load duke parents: diff changeset	181	a vendor-specific prefix such as the vendor's name to
90ce3da70b43 Initial load duke parents: diff changeset	182	avoid collisions of the attribute name between the future extension
90ce3da70b43 Initial load duke parents: diff changeset	183	to the standard management interface and the platform extension.
90ce3da70b43 Initial load duke parents: diff changeset	184	If the future extension to the standard management interface defines
90ce3da70b43 Initial load duke parents: diff changeset	185	a new attribute for a management interface and the attribute name
90ce3da70b43 Initial load duke parents: diff changeset	186	is happened to be same as some vendor-specific attribute's name,
90ce3da70b43 Initial load duke parents: diff changeset	187	the applications accessing that vendor-specific attribute would have
90ce3da70b43 Initial load duke parents: diff changeset	188	to be modified to cope with versioning and compatibility issues.
90ce3da70b43 Initial load duke parents: diff changeset	189
9013 eedac0b9f552 7024172: Move BufferPoolMXBean and PlatformLoggingMXBean java.lang.management mchung parents: 5506 diff changeset	190	<p>Below is an example showing how to access an attribute
eedac0b9f552 7024172: Move BufferPoolMXBean and PlatformLoggingMXBean java.lang.management mchung parents: 5506 diff changeset	191	from the platform extension:
2 90ce3da70b43 Initial load duke parents: diff changeset	192
90ce3da70b43 Initial load duke parents: diff changeset	193	<p>
9013 eedac0b9f552 7024172: Move BufferPoolMXBean and PlatformLoggingMXBean java.lang.management mchung parents: 5506 diff changeset	194	1) Direct access to the Oracle-specific MXBean interface
eedac0b9f552 7024172: Move BufferPoolMXBean and PlatformLoggingMXBean java.lang.management mchung parents: 5506 diff changeset	195	<blockquote>
eedac0b9f552 7024172: Move BufferPoolMXBean and PlatformLoggingMXBean java.lang.management mchung parents: 5506 diff changeset	196	<pre>
eedac0b9f552 7024172: Move BufferPoolMXBean and PlatformLoggingMXBean java.lang.management mchung parents: 5506 diff changeset	197	List<com.sun.management.GarbageCollectorMXBean> mxbeans =
eedac0b9f552 7024172: Move BufferPoolMXBean and PlatformLoggingMXBean java.lang.management mchung parents: 5506 diff changeset	198	ManagementFactory.getPlatformMXBeans(com.sun.management.GarbageCollectorMXBean.class);
2 90ce3da70b43 Initial load duke parents: diff changeset	199
9013 eedac0b9f552 7024172: Move BufferPoolMXBean and PlatformLoggingMXBean java.lang.management mchung parents: 5506 diff changeset	200	for (com.sun.management.GarbageCollectorMXBean gc : mxbeans) {
eedac0b9f552 7024172: Move BufferPoolMXBean and PlatformLoggingMXBean java.lang.management mchung parents: 5506 diff changeset	201	// Get the standard attribute "CollectionCount"
eedac0b9f552 7024172: Move BufferPoolMXBean and PlatformLoggingMXBean java.lang.management mchung parents: 5506 diff changeset	202	String count = mxbean.getCollectionCount();
2 90ce3da70b43 Initial load duke parents: diff changeset	203
9013 eedac0b9f552 7024172: Move BufferPoolMXBean and PlatformLoggingMXBean java.lang.management mchung parents: 5506 diff changeset	204	// Get the platform-specific attribute "LastGcInfo"
eedac0b9f552 7024172: Move BufferPoolMXBean and PlatformLoggingMXBean java.lang.management mchung parents: 5506 diff changeset	205	GcInfo gcinfo = gc.getLastGcInfo();
eedac0b9f552 7024172: Move BufferPoolMXBean and PlatformLoggingMXBean java.lang.management mchung parents: 5506 diff changeset	206	...
eedac0b9f552 7024172: Move BufferPoolMXBean and PlatformLoggingMXBean java.lang.management mchung parents: 5506 diff changeset	207	}
2 90ce3da70b43 Initial load duke parents: diff changeset	208	</pre>
90ce3da70b43 Initial load duke parents: diff changeset	209	</blockquote>
90ce3da70b43 Initial load duke parents: diff changeset	210
90ce3da70b43 Initial load duke parents: diff changeset	211	<p>
9013 eedac0b9f552 7024172: Move BufferPoolMXBean and PlatformLoggingMXBean java.lang.management mchung parents: 5506 diff changeset	212	2) Access the Oracle-specific MXBean interface via <tt>MBeanServer</tt>
eedac0b9f552 7024172: Move BufferPoolMXBean and PlatformLoggingMXBean java.lang.management mchung parents: 5506 diff changeset	213	through proxy
2 90ce3da70b43 Initial load duke parents: diff changeset	214
90ce3da70b43 Initial load duke parents: diff changeset	215	<blockquote><pre>
90ce3da70b43 Initial load duke parents: diff changeset	216	MBeanServerConnection mbs;
90ce3da70b43 Initial load duke parents: diff changeset	217
90ce3da70b43 Initial load duke parents: diff changeset	218	// Connect to a running JVM (or itself) and get MBeanServerConnection
90ce3da70b43 Initial load duke parents: diff changeset	219	// that has the JVM MXBeans registered in it
90ce3da70b43 Initial load duke parents: diff changeset	220	...
90ce3da70b43 Initial load duke parents: diff changeset	221
9013 eedac0b9f552 7024172: Move BufferPoolMXBean and PlatformLoggingMXBean java.lang.management mchung parents: 5506 diff changeset	222	List<com.sun.management.GarbageCollectorMXBean> mxbeans =
eedac0b9f552 7024172: Move BufferPoolMXBean and PlatformLoggingMXBean java.lang.management mchung parents: 5506 diff changeset	223	ManagementFactory.getPlatformMXBeans(mbs, com.sun.management.GarbageCollectorMXBean.class);
2 90ce3da70b43 Initial load duke parents: diff changeset	224
9013 eedac0b9f552 7024172: Move BufferPoolMXBean and PlatformLoggingMXBean java.lang.management mchung parents: 5506 diff changeset	225	for (com.sun.management.GarbageCollectorMXBean gc : mxbeans) {
eedac0b9f552 7024172: Move BufferPoolMXBean and PlatformLoggingMXBean java.lang.management mchung parents: 5506 diff changeset	226	// Get the standard attribute "CollectionCount"
eedac0b9f552 7024172: Move BufferPoolMXBean and PlatformLoggingMXBean java.lang.management mchung parents: 5506 diff changeset	227	String count = mxbean.getCollectionCount();
eedac0b9f552 7024172: Move BufferPoolMXBean and PlatformLoggingMXBean java.lang.management mchung parents: 5506 diff changeset	228
eedac0b9f552 7024172: Move BufferPoolMXBean and PlatformLoggingMXBean java.lang.management mchung parents: 5506 diff changeset	229	// Get the platform-specific attribute "LastGcInfo"
eedac0b9f552 7024172: Move BufferPoolMXBean and PlatformLoggingMXBean java.lang.management mchung parents: 5506 diff changeset	230	GcInfo gcinfo = gc.getLastGcInfo();
2 90ce3da70b43 Initial load duke parents: diff changeset	231	...
90ce3da70b43 Initial load duke parents: diff changeset	232	}
90ce3da70b43 Initial load duke parents: diff changeset	233	</pre></blockquote>
90ce3da70b43 Initial load duke parents: diff changeset	234
90ce3da70b43 Initial load duke parents: diff changeset	235	<p> Unless otherwise noted, passing a <tt>null</tt> argument to a constructor
90ce3da70b43 Initial load duke parents: diff changeset	236	or method in any class or interface in this package will cause a {@link
90ce3da70b43 Initial load duke parents: diff changeset	237	java.lang.NullPointerException NullPointerException} to be thrown.
90ce3da70b43 Initial load duke parents: diff changeset	238
90ce3da70b43 Initial load duke parents: diff changeset	239	<p> The java.lang.management API is thread-safe.
90ce3da70b43 Initial load duke parents: diff changeset	240
90ce3da70b43 Initial load duke parents: diff changeset	241	@see <a href="../../../javax/management/package-summary.html">
90ce3da70b43 Initial load duke parents: diff changeset	242	JMX Specification.</a>
90ce3da70b43 Initial load duke parents: diff changeset	243
90ce3da70b43 Initial load duke parents: diff changeset	244	@author Mandy Chung
90ce3da70b43 Initial load duke parents: diff changeset	245	@since 1.5
90ce3da70b43 Initial load duke parents: diff changeset	246
90ce3da70b43 Initial load duke parents: diff changeset	247	</body>
90ce3da70b43 Initial load duke parents: diff changeset	248	</html>

author	alanb
	Fri, 02 Nov 2012 15:50:11 +0000
changeset 14342	8435a30053c1
parent 9013	eedac0b9f552
child 21334	c60dfce46a77
permissions	-rw-r--r--