java/8 : java/lang/management/ManagementFactory.java

ManagementFactory
https://openjdk.java.net/
GPLv2 + Classpath Exception
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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package java.lang.management;
import javax.management.DynamicMBean;
import javax.management.MBeanServer;
import javax.management.MBeanServerConnection;
import javax.management.MBeanServerFactory;
import javax.management.MBeanServerPermission;
import javax.management.NotificationEmitter;
import javax.management.ObjectInstance;
import javax.management.ObjectName;
import javax.management.InstanceAlreadyExistsException;
import javax.management.InstanceNotFoundException;
import javax.management.MalformedObjectNameException;
import javax.management.MBeanRegistrationException;
import javax.management.NotCompliantMBeanException;
import javax.management.StandardEmitterMBean;
import javax.management.StandardMBean;
import java.util.Collections;
import java.util.List;
import java.util.Set;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
import java.security.AccessController;
import java.security.Permission;
import java.security.PrivilegedAction;
import java.security.PrivilegedActionException;
import java.security.PrivilegedExceptionAction;
import javax.management.JMX;
import sun.management.ManagementFactoryHelper;
import sun.management.ExtendedPlatformComponent;

The ManagementFactory class is a factory class for getting managed beans for the Java platform. This class consists of static methods each of which returns one or more platform MXBeans representing
the management interface of a component of the Java virtual
machine.
Platform MXBeans

A platform MXBean is a managed bean that
conforms to the JMX Instrumentation Specification and only uses a set of basic data types. A JMX management application and the platform MBeanServer can interoperate without requiring classes for MXBean specific data types. The data types being transmitted between the JMX connector server and the connector client are open types and this allows interoperation across versions. See 
the specification of MXBeans for details.

Each platform MXBean is a PlatformManagedObject and it has a unique ObjectName for registration in the platform MBeanServer as returned by by the getObjectName method. 

An application can access a platform MXBean in the following ways:
1. Direct access to an MXBean interface


    Get an MXBean instance by calling the getPlatformMXBean or getPlatformMXBeans method and access the MXBean locally in the running virtual machine. 
    Construct an MXBean proxy instance that forwards the method calls to a given MBeanServer by calling the getPlatformMXBean(MBeanServerConnection, Class<PlatformManagedObject>) or getPlatformMXBeans(MBeanServerConnection, Class<PlatformManagedObject>) method. The newPlatformMXBeanProxy method can also be used to construct an MXBean proxy instance of a given ObjectName. A proxy is typically constructed to remotely access an MXBean of another running virtual machine. 

2. Indirect access to an MXBean interface via MBeanServer

    Go through the platform MBeanServer to access MXBeans locally or a specific MBeanServerConnection to access
        MXBeans remotely.
        The attributes and operations of an MXBean use only
        JMX open types which include basic data types, CompositeData, and TabularData defined in OpenType. The mapping is specified in the MXBean specification for details. 


 The getPlatformManagementInterfaces method returns all management interfaces supported in the Java virtual machine including the standard management interfaces listed in the tables below as well as the management interfaces extended by the JDK implementation. 

A Java virtual machine has a single instance of the following management
interfaces:



Management Interface
ObjectName


 ClassLoadingMXBean 
 
            java.lang:type=ClassLoading


 MemoryMXBean 
 
            java.lang:type=Memory


 ThreadMXBean 
 
            java.lang:type=Threading


 RuntimeMXBean 
 
            java.lang:type=Runtime


 OperatingSystemMXBean 
 
            java.lang:type=OperatingSystem


 PlatformLoggingMXBean 
 
            java.util.logging:type=Logging




A Java virtual machine has zero or a single instance of
the following management interfaces.



Management Interface
ObjectName


 CompilationMXBean 
 
            java.lang:type=Compilation




A Java virtual machine may have one or more instances of the following
management interfaces.



Management Interface
ObjectName


 GarbageCollectorMXBean 
 
            java.lang:type=GarbageCollector,name=collector's name


 MemoryManagerMXBean 
 
            java.lang:type=MemoryManager,name=manager's name


 MemoryPoolMXBean 
 
            java.lang:type=MemoryPool,name=pool's name


 BufferPoolMXBean 
 java.nio:type=BufferPool,name=pool name



Author:  Mandy Chung
See Also: 
 *      JMX Specification

 *      Ways to Access Management Metrics
MXBean
Since:   1.5/**
 * The {@code ManagementFactory} class is a factory class for getting
 * managed beans for the Java platform.
 * This class consists of static methods each of which returns
 * one or more <i>platform MXBeans</i> representing
 * the management interface of a component of the Java virtual
 * machine.
 *
 * <h3><a name="MXBean">Platform MXBeans</a></h3>
 * <p>
 * A platform MXBean is a <i>managed bean</i> that
 * conforms to the <a href="../../../javax/management/package-summary.html">JMX</a>
 * Instrumentation Specification and only uses a set of basic data types.
 * A JMX management application and the {@linkplain
 * #getPlatformMBeanServer platform MBeanServer}
 * can interoperate without requiring classes for MXBean specific
 * data types.
 * The data types being transmitted between the JMX connector
 * server and the connector client are
 * {@linkplain javax.management.openmbean.OpenType open types}
 * and this allows interoperation across versions.
 * See <a href="../../../javax/management/MXBean.html#MXBean-spec">
 * the specification of MXBeans</a> for details.
 *
 * <a name="MXBeanNames"></a>
 * <p>Each platform MXBean is a {@link PlatformManagedObject}
 * and it has a unique
 * {@link javax.management.ObjectName ObjectName} for
 * registration in the platform {@code MBeanServer} as returned by
 * by the {@link PlatformManagedObject#getObjectName getObjectName}
 * method.
 *
 * <p>
 * An application can access a platform MXBean in the following ways:
 * <h4>1. Direct access to an MXBean interface</h4>
 * <blockquote>
 * <ul>
 *     <li>Get an MXBean instance by calling the
 *         {@link #getPlatformMXBean(Class) getPlatformMXBean} or
 *         {@link #getPlatformMXBeans(Class) getPlatformMXBeans} method
 *         and access the MXBean locally in the running
 *         virtual machine.
 *         </li>
 *     <li>Construct an MXBean proxy instance that forwards the
 *         method calls to a given {@link MBeanServer MBeanServer} by calling
 *         the {@link #getPlatformMXBean(MBeanServerConnection, Class)} or
 *         {@link #getPlatformMXBeans(MBeanServerConnection, Class)} method.
 *         The {@link #newPlatformMXBeanProxy newPlatformMXBeanProxy} method
 *         can also be used to construct an MXBean proxy instance of
 *         a given {@code ObjectName}.
 *         A proxy is typically constructed to remotely access
 *         an MXBean of another running virtual machine.
 *         </li>
 * </ul>
 * <h4>2. Indirect access to an MXBean interface via MBeanServer</h4>
 * <ul>
 *     <li>Go through the platform {@code MBeanServer} to access MXBeans
 *         locally or a specific <tt>MBeanServerConnection</tt> to access
 *         MXBeans remotely.
 *         The attributes and operations of an MXBean use only
 *         <em>JMX open types</em> which include basic data types,
 *         {@link javax.management.openmbean.CompositeData CompositeData},
 *         and {@link javax.management.openmbean.TabularData TabularData}
 *         defined in
 *         {@link javax.management.openmbean.OpenType OpenType}.
 *         The mapping is specified in
 *         the {@linkplain javax.management.MXBean MXBean} specification
 *         for details.
 *        </li>
 * </ul>
 * </blockquote>
 *
 * <p>
 * The {@link #getPlatformManagementInterfaces getPlatformManagementInterfaces}
 * method returns all management interfaces supported in the Java virtual machine
 * including the standard management interfaces listed in the tables
 * below as well as the management interfaces extended by the JDK implementation.
 * <p>
 * A Java virtual machine has a single instance of the following management
 * interfaces:
 *
 * <blockquote>
 * <table border summary="The list of Management Interfaces and their single instances">
 * <tr>
 * <th>Management Interface</th>
 * <th>ObjectName</th>
 * </tr>
 * <tr>
 * <td> {@link ClassLoadingMXBean} </td>
 * <td> {@link #CLASS_LOADING_MXBEAN_NAME
 *             java.lang:type=ClassLoading}</td>
 * </tr>
 * <tr>
 * <td> {@link MemoryMXBean} </td>
 * <td> {@link #MEMORY_MXBEAN_NAME
 *             java.lang:type=Memory}</td>
 * </tr>
 * <tr>
 * <td> {@link ThreadMXBean} </td>
 * <td> {@link #THREAD_MXBEAN_NAME
 *             java.lang:type=Threading}</td>
 * </tr>
 * <tr>
 * <td> {@link RuntimeMXBean} </td>
 * <td> {@link #RUNTIME_MXBEAN_NAME
 *             java.lang:type=Runtime}</td>
 * </tr>
 * <tr>
 * <td> {@link OperatingSystemMXBean} </td>
 * <td> {@link #OPERATING_SYSTEM_MXBEAN_NAME
 *             java.lang:type=OperatingSystem}</td>
 * </tr>
 * <tr>
 * <td> {@link PlatformLoggingMXBean} </td>
 * <td> {@link java.util.logging.LogManager#LOGGING_MXBEAN_NAME
 *             java.util.logging:type=Logging}</td>
 * </tr>
 * </table>
 * </blockquote>
 *
 * <p>
 * A Java virtual machine has zero or a single instance of
 * the following management interfaces.
 *
 * <blockquote>
 * <table border summary="The list of Management Interfaces and their single instances">
 * <tr>
 * <th>Management Interface</th>
 * <th>ObjectName</th>
 * </tr>
 * <tr>
 * <td> {@link CompilationMXBean} </td>
 * <td> {@link #COMPILATION_MXBEAN_NAME
 *             java.lang:type=Compilation}</td>
 * </tr>
 * </table>
 * </blockquote>
 *
 * <p>
 * A Java virtual machine may have one or more instances of the following
 * management interfaces.
 * <blockquote>
 * <table border summary="The list of Management Interfaces and their single instances">
 * <tr>
 * <th>Management Interface</th>
 * <th>ObjectName</th>
 * </tr>
 * <tr>
 * <td> {@link GarbageCollectorMXBean} </td>
 * <td> {@link #GARBAGE_COLLECTOR_MXBEAN_DOMAIN_TYPE
 *             java.lang:type=GarbageCollector}<tt>,name=</tt><i>collector's name</i></td>
 * </tr>
 * <tr>
 * <td> {@link MemoryManagerMXBean} </td>
 * <td> {@link #MEMORY_MANAGER_MXBEAN_DOMAIN_TYPE
 *             java.lang:type=MemoryManager}<tt>,name=</tt><i>manager's name</i></td>
 * </tr>
 * <tr>
 * <td> {@link MemoryPoolMXBean} </td>
 * <td> {@link #MEMORY_POOL_MXBEAN_DOMAIN_TYPE
 *             java.lang:type=MemoryPool}<tt>,name=</tt><i>pool's name</i></td>
 * </tr>
 * <tr>
 * <td> {@link BufferPoolMXBean} </td>
 * <td> {@code java.nio:type=BufferPool,name=}<i>pool name</i></td>
 * </tr>
 * </table>
 * </blockquote>
 *
 * @see <a href="../../../javax/management/package-summary.html">
 *      JMX Specification</a>
 * @see <a href="package-summary.html#examples">
 *      Ways to Access Management Metrics</a>
 * @see javax.management.MXBean
 *
 * @author  Mandy Chung
 * @since   1.5
 */
public class ManagementFactory {
    // A class with only static fields and methods.
    private ManagementFactory() {};

    String representation of the
ObjectName for the ClassLoadingMXBean. /**
     * String representation of the
     * <tt>ObjectName</tt> for the {@link ClassLoadingMXBean}.
     */
    public final static String CLASS_LOADING_MXBEAN_NAME =
        "java.lang:type=ClassLoading";

    String representation of the
ObjectName for the CompilationMXBean. /**
     * String representation of the
     * <tt>ObjectName</tt> for the {@link CompilationMXBean}.
     */
    public final static String COMPILATION_MXBEAN_NAME =
        "java.lang:type=Compilation";

    String representation of the
ObjectName for the MemoryMXBean. /**
     * String representation of the
     * <tt>ObjectName</tt> for the {@link MemoryMXBean}.
     */
    public final static String MEMORY_MXBEAN_NAME =
        "java.lang:type=Memory";

    String representation of the
ObjectName for the OperatingSystemMXBean. /**
     * String representation of the
     * <tt>ObjectName</tt> for the {@link OperatingSystemMXBean}.
     */
    public final static String OPERATING_SYSTEM_MXBEAN_NAME =
        "java.lang:type=OperatingSystem";

    String representation of the
ObjectName for the RuntimeMXBean. /**
     * String representation of the
     * <tt>ObjectName</tt> for the {@link RuntimeMXBean}.
     */
    public final static String RUNTIME_MXBEAN_NAME =
        "java.lang:type=Runtime";

    String representation of the
ObjectName for the ThreadMXBean. /**
     * String representation of the
     * <tt>ObjectName</tt> for the {@link ThreadMXBean}.
     */
    public final static String THREAD_MXBEAN_NAME =
        "java.lang:type=Threading";

    The domain name and the type key property in
the ObjectName for a GarbageCollectorMXBean. The unique ObjectName for a GarbageCollectorMXBean
can be formed by appending this string with
",name=collector's name".
/**
     * The domain name and the type key property in
     * the <tt>ObjectName</tt> for a {@link GarbageCollectorMXBean}.
     * The unique <tt>ObjectName</tt> for a <tt>GarbageCollectorMXBean</tt>
     * can be formed by appending this string with
     * "<tt>,name=</tt><i>collector's name</i>".
     */
    public final static String GARBAGE_COLLECTOR_MXBEAN_DOMAIN_TYPE =
        "java.lang:type=GarbageCollector";

    The domain name and the type key property in
the ObjectName for a MemoryManagerMXBean. The unique ObjectName for a MemoryManagerMXBean
can be formed by appending this string with
",name=manager's name".
/**
     * The domain name and the type key property in
     * the <tt>ObjectName</tt> for a {@link MemoryManagerMXBean}.
     * The unique <tt>ObjectName</tt> for a <tt>MemoryManagerMXBean</tt>
     * can be formed by appending this string with
     * "<tt>,name=</tt><i>manager's name</i>".
     */
    public final static String MEMORY_MANAGER_MXBEAN_DOMAIN_TYPE=
        "java.lang:type=MemoryManager";

    The domain name and the type key property in
the ObjectName for a MemoryPoolMXBean. The unique ObjectName for a MemoryPoolMXBean
can be formed by appending this string with
,name=pool's name.
/**
     * The domain name and the type key property in
     * the <tt>ObjectName</tt> for a {@link MemoryPoolMXBean}.
     * The unique <tt>ObjectName</tt> for a <tt>MemoryPoolMXBean</tt>
     * can be formed by appending this string with
     * <tt>,name=</tt><i>pool's name</i>.
     */
    public final static String MEMORY_POOL_MXBEAN_DOMAIN_TYPE=
        "java.lang:type=MemoryPool";

    Returns the managed bean for the class loading system of
the Java virtual machine.
Returns: a ClassLoadingMXBean object for the Java virtual machine./**
     * Returns the managed bean for the class loading system of
     * the Java virtual machine.
     *
     * @return a {@link ClassLoadingMXBean} object for
     * the Java virtual machine.
     */
    public static ClassLoadingMXBean getClassLoadingMXBean() {
        return ManagementFactoryHelper.getClassLoadingMXBean();
    }

    Returns the managed bean for the memory system of
the Java virtual machine.
Returns: a MemoryMXBean object for the Java virtual machine./**
     * Returns the managed bean for the memory system of
     * the Java virtual machine.
     *
     * @return a {@link MemoryMXBean} object for the Java virtual machine.
     */
    public static MemoryMXBean getMemoryMXBean() {
        return ManagementFactoryHelper.getMemoryMXBean();
    }

    Returns the managed bean for the thread system of
the Java virtual machine.
Returns: a ThreadMXBean object for the Java virtual machine./**
     * Returns the managed bean for the thread system of
     * the Java virtual machine.
     *
     * @return a {@link ThreadMXBean} object for the Java virtual machine.
     */
    public static ThreadMXBean getThreadMXBean() {
        return ManagementFactoryHelper.getThreadMXBean();
    }

    Returns the managed bean for the runtime system of
the Java virtual machine.
Returns: a RuntimeMXBean object for the Java virtual machine./**
     * Returns the managed bean for the runtime system of
     * the Java virtual machine.
     *
     * @return a {@link RuntimeMXBean} object for the Java virtual machine.

     */
    public static RuntimeMXBean getRuntimeMXBean() {
        return ManagementFactoryHelper.getRuntimeMXBean();
    }

    Returns the managed bean for the compilation system of
the Java virtual machine.  This method returns null
if the Java virtual machine has no compilation system.
Returns: a CompilationMXBean object for the Java virtual machine or null if the Java virtual machine has
  no compilation system./**
     * Returns the managed bean for the compilation system of
     * the Java virtual machine.  This method returns <tt>null</tt>
     * if the Java virtual machine has no compilation system.
     *
     * @return a {@link CompilationMXBean} object for the Java virtual
     *   machine or <tt>null</tt> if the Java virtual machine has
     *   no compilation system.
     */
    public static CompilationMXBean getCompilationMXBean() {
        return ManagementFactoryHelper.getCompilationMXBean();
    }

    Returns the managed bean for the operating system on which
the Java virtual machine is running.
Returns: an OperatingSystemMXBean object for the Java virtual machine./**
     * Returns the managed bean for the operating system on which
     * the Java virtual machine is running.
     *
     * @return an {@link OperatingSystemMXBean} object for
     * the Java virtual machine.
     */
    public static OperatingSystemMXBean getOperatingSystemMXBean() {
        return ManagementFactoryHelper.getOperatingSystemMXBean();
    }

    Returns a list of MemoryPoolMXBean objects in the Java virtual machine. The Java virtual machine can have one or more memory pools. It may add or remove memory pools during execution. 
Returns: a list of MemoryPoolMXBean objects./**
     * Returns a list of {@link MemoryPoolMXBean} objects in the
     * Java virtual machine.
     * The Java virtual machine can have one or more memory pools.
     * It may add or remove memory pools during execution.
     *
     * @return a list of <tt>MemoryPoolMXBean</tt> objects.
     *
     */
    public static List<MemoryPoolMXBean> getMemoryPoolMXBeans() {
        return ManagementFactoryHelper.getMemoryPoolMXBeans();
    }

    Returns a list of MemoryManagerMXBean objects in the Java virtual machine. The Java virtual machine can have one or more memory managers. It may add or remove memory managers during execution. 
Returns: a list of MemoryManagerMXBean objects./**
     * Returns a list of {@link MemoryManagerMXBean} objects
     * in the Java virtual machine.
     * The Java virtual machine can have one or more memory managers.
     * It may add or remove memory managers during execution.
     *
     * @return a list of <tt>MemoryManagerMXBean</tt> objects.
     *
     */
    public static List<MemoryManagerMXBean> getMemoryManagerMXBeans() {
        return ManagementFactoryHelper.getMemoryManagerMXBeans();
    }


    Returns a list of GarbageCollectorMXBean objects in the Java virtual machine. The Java virtual machine may have one or more GarbageCollectorMXBean objects.
It may add or remove GarbageCollectorMXBean
during execution.
Returns: a list of GarbageCollectorMXBean objects./**
     * Returns a list of {@link GarbageCollectorMXBean} objects
     * in the Java virtual machine.
     * The Java virtual machine may have one or more
     * <tt>GarbageCollectorMXBean</tt> objects.
     * It may add or remove <tt>GarbageCollectorMXBean</tt>
     * during execution.
     *
     * @return a list of <tt>GarbageCollectorMXBean</tt> objects.
     *
     */
    public static List<GarbageCollectorMXBean> getGarbageCollectorMXBeans() {
        return ManagementFactoryHelper.getGarbageCollectorMXBeans();
    }

    private static MBeanServer platformMBeanServer;
    Returns the platform MBeanServer. On the first call to this method, it first creates the platform MBeanServer by calling the 
MBeanServerFactory.createMBeanServer method and registers each platform MXBean in this platform MBeanServer with its ObjectName. This method, in subsequent calls, will simply return the initially created platform MBeanServer.  MXBeans that get created and destroyed dynamically, for example, memory pools and managers, will automatically be registered and deregistered into the platform MBeanServer. 
 If the system property javax.management.builder.initial is set, the platform MBeanServer creation will be done by the specified MBeanServerBuilder. 
 It is recommended that this platform MBeanServer also be used to register other application managed beans besides the platform MXBeans. This will allow all MBeans to be published through the same MBeanServer and hence allow for easier network publishing and discovery. Name conflicts with the platform MXBeans should be avoided. 
Throws: SecurityException – if there is a security manager and the caller does not have the permission required by MBeanServerFactory.createMBeanServer.
See Also: MBeanServerFactory
MBeanServerFactory.createMBeanServer
Returns: the platform MBeanServer; the platform MXBeans are registered into the platform MBeanServer at the first time this method is called./**
     * Returns the platform {@link javax.management.MBeanServer MBeanServer}.
     * On the first call to this method, it first creates the platform
     * {@code MBeanServer} by calling the
     * {@link javax.management.MBeanServerFactory#createMBeanServer
     * MBeanServerFactory.createMBeanServer}
     * method and registers each platform MXBean in this platform
     * {@code MBeanServer} with its
     * {@link PlatformManagedObject#getObjectName ObjectName}.
     * This method, in subsequent calls, will simply return the
     * initially created platform {@code MBeanServer}.
     * <p>
     * MXBeans that get created and destroyed dynamically, for example,
     * memory {@link MemoryPoolMXBean pools} and
     * {@link MemoryManagerMXBean managers},
     * will automatically be registered and deregistered into the platform
     * {@code MBeanServer}.
     * <p>
     * If the system property {@code javax.management.builder.initial}
     * is set, the platform {@code MBeanServer} creation will be done
     * by the specified {@link javax.management.MBeanServerBuilder}.
     * <p>
     * It is recommended that this platform MBeanServer also be used
     * to register other application managed beans
     * besides the platform MXBeans.
     * This will allow all MBeans to be published through the same
     * {@code MBeanServer} and hence allow for easier network publishing
     * and discovery.
     * Name conflicts with the platform MXBeans should be avoided.
     *
     * @return the platform {@code MBeanServer}; the platform
     *         MXBeans are registered into the platform {@code MBeanServer}
     *         at the first time this method is called.
     *
     * @exception SecurityException if there is a security manager
     * and the caller does not have the permission required by
     * {@link javax.management.MBeanServerFactory#createMBeanServer}.
     *
     * @see javax.management.MBeanServerFactory
     * @see javax.management.MBeanServerFactory#createMBeanServer
     */
    public static synchronized MBeanServer getPlatformMBeanServer() {
        SecurityManager sm = System.getSecurityManager();
        if (sm != null) {
            Permission perm = new MBeanServerPermission("createMBeanServer");
            sm.checkPermission(perm);
        }

        if (platformMBeanServer == null) {
            platformMBeanServer = MBeanServerFactory.createMBeanServer();
            for (PlatformComponent pc : PlatformComponent.values()) {
                List<? extends PlatformManagedObject> list =
                    pc.getMXBeans(pc.getMXBeanInterface());
                for (PlatformManagedObject o : list) {
                    // Each PlatformComponent represents one management
                    // interface. Some MXBean may extend another one.
                    // The MXBean instances for one platform component
                    // (returned by pc.getMXBeans()) might be also
                    // the MXBean instances for another platform component.
                    // e.g. com.sun.management.GarbageCollectorMXBean
                    //
                    // So need to check if an MXBean instance is registered
                    // before registering into the platform MBeanServer
                    if (!platformMBeanServer.isRegistered(o.getObjectName())) {
                        addMXBean(platformMBeanServer, o);
                    }
                }
            }
            HashMap<ObjectName, DynamicMBean> dynmbeans =
                    ManagementFactoryHelper.getPlatformDynamicMBeans();
            for (Map.Entry<ObjectName, DynamicMBean> e : dynmbeans.entrySet()) {
                addDynamicMBean(platformMBeanServer, e.getValue(), e.getKey());
            }
            for (final PlatformManagedObject o :
                                       ExtendedPlatformComponent.getMXBeans()) {
                if (!platformMBeanServer.isRegistered(o.getObjectName())) {
                    addMXBean(platformMBeanServer, o);
                }
            }
        }
        return platformMBeanServer;
    }

    Returns a proxy for a platform MXBean interface of a
given MXBean name
that forwards its method calls through the given
MBeanServerConnection.
This method is equivalent to:
 
       Proxy.newProxyInstance(mxbeanInterface.getClassLoader(),
       new Class[] { mxbeanInterface }, handler)

where handler is an 
InvocationHandler to which method invocations to the MXBean interface are dispatched. This handler converts an input parameter
from an MXBean data type to its mapped open type before forwarding
to the MBeanServer and converts a return value from
an MXBean method call through the MBeanServer
from an open type to the corresponding return type declared in
the MXBean interface.
 If the MXBean is a notification emitter (i.e., it implements NotificationEmitter), both the mxbeanInterface and NotificationEmitter
will be implemented by this proxy.

Notes:

Using an MXBean proxy is a convenience remote access to
a platform MXBean of a running virtual machine.  All method
calls to the MXBean proxy are forwarded to an
MBeanServerConnection where IOException may be thrown when the communication problem occurs with the connector server. An application remotely accesses the platform MXBeans using proxy should prepare to catch IOException as if
accessing with the MBeanServerConnector interface.
When a client application is designed to remotely access MXBeans for a running virtual machine whose version is different than the version on which the application is running, it should prepare to catch InvalidObjectException which is thrown when an MXBean proxy receives a name of an enum constant which is missing in the enum class loaded in the client application. 

MBeanServerInvocationHandler or its 
newProxyInstance method cannot be used to create a proxy for a platform MXBean. The proxy object created by MBeanServerInvocationHandler does not handle
the properties of the platform MXBeans described in
the class specification.


Params: connection – the MBeanServerConnection to forward to.
mxbeanName – the name of a platform MXBean within
connection to forward to. mxbeanName must be in the format of ObjectName.
mxbeanInterface – the MXBean interface to be implemented
by the proxy.
Type parameters: <T> – an mxbeanInterface type parameter
Throws: IllegalArgumentException – if

mxbeanName is not with a valid ObjectName format, or
the named MXBean in the connection is
    not a MXBean provided by the platform, or
the named MXBean is not registered in the
    MBeanServerConnection, or
the named MXBean is not an instance of the given
    mxbeanInterface
IOException – if a communication problem
occurred when accessing the MBeanServerConnection.
Returns: a proxy for a platform MXBean interface of a
given MXBean name
that forwards its method calls through the given
MBeanServerConnection, or null if not exist./**
     * Returns a proxy for a platform MXBean interface of a
     * given <a href="#MXBeanNames">MXBean name</a>
     * that forwards its method calls through the given
     * <tt>MBeanServerConnection</tt>.
     *
     * <p>This method is equivalent to:
     * <blockquote>
     * {@link java.lang.reflect.Proxy#newProxyInstance
     *        Proxy.newProxyInstance}<tt>(mxbeanInterface.getClassLoader(),
     *        new Class[] { mxbeanInterface }, handler)</tt>
     * </blockquote>
     *
     * where <tt>handler</tt> is an {@link java.lang.reflect.InvocationHandler
     * InvocationHandler} to which method invocations to the MXBean interface
     * are dispatched. This <tt>handler</tt> converts an input parameter
     * from an MXBean data type to its mapped open type before forwarding
     * to the <tt>MBeanServer</tt> and converts a return value from
     * an MXBean method call through the <tt>MBeanServer</tt>
     * from an open type to the corresponding return type declared in
     * the MXBean interface.
     *
     * <p>
     * If the MXBean is a notification emitter (i.e.,
     * it implements
     * {@link javax.management.NotificationEmitter NotificationEmitter}),
     * both the <tt>mxbeanInterface</tt> and <tt>NotificationEmitter</tt>
     * will be implemented by this proxy.
     *
     * <p>
     * <b>Notes:</b>
     * <ol>
     * <li>Using an MXBean proxy is a convenience remote access to
     * a platform MXBean of a running virtual machine.  All method
     * calls to the MXBean proxy are forwarded to an
     * <tt>MBeanServerConnection</tt> where
     * {@link java.io.IOException IOException} may be thrown
     * when the communication problem occurs with the connector server.
     * An application remotely accesses the platform MXBeans using
     * proxy should prepare to catch <tt>IOException</tt> as if
     * accessing with the <tt>MBeanServerConnector</tt> interface.</li>
     *
     * <li>When a client application is designed to remotely access MXBeans
     * for a running virtual machine whose version is different than
     * the version on which the application is running,
     * it should prepare to catch
     * {@link java.io.InvalidObjectException InvalidObjectException}
     * which is thrown when an MXBean proxy receives a name of an
     * enum constant which is missing in the enum class loaded in
     * the client application. </li>
     *
     * <li>{@link javax.management.MBeanServerInvocationHandler
     * MBeanServerInvocationHandler} or its
     * {@link javax.management.MBeanServerInvocationHandler#newProxyInstance
     * newProxyInstance} method cannot be used to create
     * a proxy for a platform MXBean. The proxy object created
     * by <tt>MBeanServerInvocationHandler</tt> does not handle
     * the properties of the platform MXBeans described in
     * the <a href="#MXBean">class specification</a>.
     *</li>
     * </ol>
     *
     * @param connection the <tt>MBeanServerConnection</tt> to forward to.
     * @param mxbeanName the name of a platform MXBean within
     * <tt>connection</tt> to forward to. <tt>mxbeanName</tt> must be
     * in the format of {@link ObjectName ObjectName}.
     * @param mxbeanInterface the MXBean interface to be implemented
     * by the proxy.
     * @param <T> an {@code mxbeanInterface} type parameter
     *
     * @return a proxy for a platform MXBean interface of a
     * given <a href="#MXBeanNames">MXBean name</a>
     * that forwards its method calls through the given
     * <tt>MBeanServerConnection</tt>, or {@code null} if not exist.
     *
     * @throws IllegalArgumentException if
     * <ul>
     * <li><tt>mxbeanName</tt> is not with a valid
     *     {@link ObjectName ObjectName} format, or</li>
     * <li>the named MXBean in the <tt>connection</tt> is
     *     not a MXBean provided by the platform, or</li>
     * <li>the named MXBean is not registered in the
     *     <tt>MBeanServerConnection</tt>, or</li>
     * <li>the named MXBean is not an instance of the given
     *     <tt>mxbeanInterface</tt></li>
     * </ul>
     *
     * @throws java.io.IOException if a communication problem
     * occurred when accessing the <tt>MBeanServerConnection</tt>.
     */
    public static <T> T
        newPlatformMXBeanProxy(MBeanServerConnection connection,
                               String mxbeanName,
                               Class<T> mxbeanInterface)
            throws java.io.IOException {

        // Only allow MXBean interfaces from rt.jar loaded by the
        // bootstrap class loader
        final Class<?> cls = mxbeanInterface;
        ClassLoader loader =
            AccessController.doPrivileged(new PrivilegedAction<ClassLoader>() {
                public ClassLoader run() {
                    return cls.getClassLoader();
                }
            });
        if (!sun.misc.VM.isSystemDomainLoader(loader)) {
            throw new IllegalArgumentException(mxbeanName +
                " is not a platform MXBean");
        }

        try {
            final ObjectName objName = new ObjectName(mxbeanName);
            // skip the isInstanceOf check for LoggingMXBean
            String intfName = mxbeanInterface.getName();
            if (!connection.isInstanceOf(objName, intfName)) {
                throw new IllegalArgumentException(mxbeanName +
                    " is not an instance of " + mxbeanInterface);
            }

            final Class[] interfaces;
            // check if the registered MBean is a notification emitter
            boolean emitter = connection.isInstanceOf(objName, NOTIF_EMITTER);

            // create an MXBean proxy
            return JMX.newMXBeanProxy(connection, objName, mxbeanInterface,
                                      emitter);
        } catch (InstanceNotFoundException|MalformedObjectNameException e) {
            throw new IllegalArgumentException(e);
        }
    }

    Returns the platform MXBean implementing the given mxbeanInterface which is specified to have one single instance in the Java virtual machine. This method may return null if the management interface is not implemented in the Java virtual machine (for example, a Java virtual machine with no compilation system does not implement CompilationMXBean); otherwise, this method is equivalent to calling:  
     getPlatformMXBeans(mxbeanInterface).get(0); 
Params: mxbeanInterface – a management interface for a platform
    MXBean with one single instance in the Java virtual machine
    if implemented.
Type parameters: <T> – an mxbeanInterface type parameter
Throws: IllegalArgumentException – if mxbeanInterface is not a platform management interface or not a singleton platform MXBean.
Returns: the platform MXBean that implements mxbeanInterface, or null if not exist.
Since: 1.7/**
     * Returns the platform MXBean implementing
     * the given {@code mxbeanInterface} which is specified
     * to have one single instance in the Java virtual machine.
     * This method may return {@code null} if the management interface
     * is not implemented in the Java virtual machine (for example,
     * a Java virtual machine with no compilation system does not
     * implement {@link CompilationMXBean});
     * otherwise, this method is equivalent to calling:
     * <pre>
     *    {@link #getPlatformMXBeans(Class)
     *      getPlatformMXBeans(mxbeanInterface)}.get(0);
     * </pre>
     *
     * @param mxbeanInterface a management interface for a platform
     *     MXBean with one single instance in the Java virtual machine
     *     if implemented.
     * @param <T> an {@code mxbeanInterface} type parameter
     *
     * @return the platform MXBean that implements
     * {@code mxbeanInterface}, or {@code null} if not exist.
     *
     * @throws IllegalArgumentException if {@code mxbeanInterface}
     * is not a platform management interface or
     * not a singleton platform MXBean.
     *
     * @since 1.7
     */
    public static <T extends PlatformManagedObject>
            T getPlatformMXBean(Class<T> mxbeanInterface) {
        PlatformComponent pc = PlatformComponent.getPlatformComponent(mxbeanInterface);
        if (pc == null) {
            T mbean = ExtendedPlatformComponent.getMXBean(mxbeanInterface);
            if (mbean != null) {
                return mbean;
            }
            throw new IllegalArgumentException(mxbeanInterface.getName() +
                " is not a platform management interface");
        }
        if (!pc.isSingleton())
            throw new IllegalArgumentException(mxbeanInterface.getName() +
                " can have zero or more than one instances");

        return pc.getSingletonMXBean(mxbeanInterface);
    }

    Returns the list of platform MXBeans implementing the given mxbeanInterface in the Java virtual machine. The returned list may contain zero, one, or more instances. The number of instances in the returned list is defined in the specification of the given management interface. The order is undefined and there is no guarantee that the list returned is in the same order as previous invocations. 
Params: mxbeanInterface – a management interface for a platform
                       MXBean
Type parameters: <T> – an mxbeanInterface type parameter
Throws: IllegalArgumentException – if mxbeanInterface is not a platform management interface.
Returns: the list of platform MXBeans that implement mxbeanInterface.
Since: 1.7/**
     * Returns the list of platform MXBeans implementing
     * the given {@code mxbeanInterface} in the Java
     * virtual machine.
     * The returned list may contain zero, one, or more instances.
     * The number of instances in the returned list is defined
     * in the specification of the given management interface.
     * The order is undefined and there is no guarantee that
     * the list returned is in the same order as previous invocations.
     *
     * @param mxbeanInterface a management interface for a platform
     *                        MXBean
     * @param <T> an {@code mxbeanInterface} type parameter
     *
     * @return the list of platform MXBeans that implement
     * {@code mxbeanInterface}.
     *
     * @throws IllegalArgumentException if {@code mxbeanInterface}
     * is not a platform management interface.
     *
     * @since 1.7
     */
    public static <T extends PlatformManagedObject> List<T>
            getPlatformMXBeans(Class<T> mxbeanInterface) {
        PlatformComponent pc = PlatformComponent.getPlatformComponent(mxbeanInterface);
        if (pc == null) {
            T mbean = ExtendedPlatformComponent.getMXBean(mxbeanInterface);
            if (mbean != null) {
                return Collections.singletonList(mbean);
            }
            throw new IllegalArgumentException(mxbeanInterface.getName() +
                " is not a platform management interface");
        }
        return Collections.unmodifiableList(pc.getMXBeans(mxbeanInterface));
    }

    Returns the platform MXBean proxy for mxbeanInterface which is specified to have one single instance in a Java virtual machine and the proxy will forward the method calls through the given MBeanServerConnection. This method may return null if the management interface is not implemented in the Java virtual machine being monitored (for example, a Java virtual machine with no compilation system does not implement CompilationMXBean); otherwise, this method is equivalent to calling:  
       getPlatformMXBeans(connection, mxbeanInterface).get(0); 
Params: connection – the MBeanServerConnection to forward to.
mxbeanInterface – a management interface for a platform
    MXBean with one single instance in the Java virtual machine
    being monitored, if implemented.
Type parameters: <T> – an mxbeanInterface type parameter
Throws: IllegalArgumentException – if mxbeanInterface is not a platform management interface or not a singleton platform MXBean.
IOException – if a communication problem occurred when accessing the MBeanServerConnection.
See Also: newPlatformMXBeanProxy
Returns: the platform MXBean proxy for forwarding the method calls of the mxbeanInterface through the given MBeanServerConnection, or null if not exist.
Since: 1.7/**
     * Returns the platform MXBean proxy for
     * {@code mxbeanInterface} which is specified to have one single
     * instance in a Java virtual machine and the proxy will
     * forward the method calls through the given {@code MBeanServerConnection}.
     * This method may return {@code null} if the management interface
     * is not implemented in the Java virtual machine being monitored
     * (for example, a Java virtual machine with no compilation system
     * does not implement {@link CompilationMXBean});
     * otherwise, this method is equivalent to calling:
     * <pre>
     *     {@link #getPlatformMXBeans(MBeanServerConnection, Class)
     *        getPlatformMXBeans(connection, mxbeanInterface)}.get(0);
     * </pre>
     *
     * @param connection the {@code MBeanServerConnection} to forward to.
     * @param mxbeanInterface a management interface for a platform
     *     MXBean with one single instance in the Java virtual machine
     *     being monitored, if implemented.
     * @param <T> an {@code mxbeanInterface} type parameter
     *
     * @return the platform MXBean proxy for
     * forwarding the method calls of the {@code mxbeanInterface}
     * through the given {@code MBeanServerConnection},
     * or {@code null} if not exist.
     *
     * @throws IllegalArgumentException if {@code mxbeanInterface}
     * is not a platform management interface or
     * not a singleton platform MXBean.
     * @throws java.io.IOException if a communication problem
     * occurred when accessing the {@code MBeanServerConnection}.
     *
     * @see #newPlatformMXBeanProxy
     * @since 1.7
     */
    public static <T extends PlatformManagedObject>
            T getPlatformMXBean(MBeanServerConnection connection,
                                Class<T> mxbeanInterface)
        throws java.io.IOException
    {
        PlatformComponent pc = PlatformComponent.getPlatformComponent(mxbeanInterface);
        if (pc == null) {
            T mbean = ExtendedPlatformComponent.getMXBean(mxbeanInterface);
            if (mbean != null) {
                ObjectName on = mbean.getObjectName();
                return ManagementFactory.newPlatformMXBeanProxy(connection,
                                                                on.getCanonicalName(),
                                                                mxbeanInterface);
            }
            throw new IllegalArgumentException(mxbeanInterface.getName() +
                " is not a platform management interface");
        }
        if (!pc.isSingleton())
            throw new IllegalArgumentException(mxbeanInterface.getName() +
                " can have zero or more than one instances");
        return pc.getSingletonMXBean(connection, mxbeanInterface);
    }

    Returns the list of the platform MXBean proxies for forwarding the method calls of the mxbeanInterface through the given MBeanServerConnection. The returned list may contain zero, one, or more instances. The number of instances in the returned list is defined in the specification of the given management interface. The order is undefined and there is no guarantee that the list returned is in the same order as previous invocations. 
Params: connection – the MBeanServerConnection to forward to.
mxbeanInterface – a management interface for a platform
                       MXBean
Type parameters: <T> – an mxbeanInterface type parameter
Throws: IllegalArgumentException – if mxbeanInterface is not a platform management interface.
IOException – if a communication problem occurred when accessing the MBeanServerConnection.
See Also: newPlatformMXBeanProxy
Returns: the list of platform MXBean proxies for forwarding the method calls of the mxbeanInterface through the given MBeanServerConnection.
Since: 1.7/**
     * Returns the list of the platform MXBean proxies for
     * forwarding the method calls of the {@code mxbeanInterface}
     * through the given {@code MBeanServerConnection}.
     * The returned list may contain zero, one, or more instances.
     * The number of instances in the returned list is defined
     * in the specification of the given management interface.
     * The order is undefined and there is no guarantee that
     * the list returned is in the same order as previous invocations.
     *
     * @param connection the {@code MBeanServerConnection} to forward to.
     * @param mxbeanInterface a management interface for a platform
     *                        MXBean
     * @param <T> an {@code mxbeanInterface} type parameter
     *
     * @return the list of platform MXBean proxies for
     * forwarding the method calls of the {@code mxbeanInterface}
     * through the given {@code MBeanServerConnection}.
     *
     * @throws IllegalArgumentException if {@code mxbeanInterface}
     * is not a platform management interface.
     *
     * @throws java.io.IOException if a communication problem
     * occurred when accessing the {@code MBeanServerConnection}.
     *
     * @see #newPlatformMXBeanProxy
     * @since 1.7
     */
    public static <T extends PlatformManagedObject>
            List<T> getPlatformMXBeans(MBeanServerConnection connection,
                                       Class<T> mxbeanInterface)
        throws java.io.IOException
    {
        PlatformComponent pc = PlatformComponent.getPlatformComponent(mxbeanInterface);
        if (pc == null) {
            T mbean = ExtendedPlatformComponent.getMXBean(mxbeanInterface);
            if (mbean != null) {
                ObjectName on = mbean.getObjectName();
                T proxy = ManagementFactory.newPlatformMXBeanProxy(connection,
                            on.getCanonicalName(), mxbeanInterface);
                return Collections.singletonList(proxy);
            }
            throw new IllegalArgumentException(mxbeanInterface.getName() +
                " is not a platform management interface");
        }
        return Collections.unmodifiableList(pc.getMXBeans(connection, mxbeanInterface));
    }

    Returns the set of Class objects, subinterface of PlatformManagedObject, representing all management interfaces for monitoring and managing the Java platform. 
Returns: the set of Class objects, subinterface of PlatformManagedObject representing the management interfaces for monitoring and managing the Java platform.
Since: 1.7/**
     * Returns the set of {@code Class} objects, subinterface of
     * {@link PlatformManagedObject}, representing
     * all management interfaces for
     * monitoring and managing the Java platform.
     *
     * @return the set of {@code Class} objects, subinterface of
     * {@link PlatformManagedObject} representing
     * the management interfaces for
     * monitoring and managing the Java platform.
     *
     * @since 1.7
     */
    public static Set<Class<? extends PlatformManagedObject>>
           getPlatformManagementInterfaces()
    {
        Set<Class<? extends PlatformManagedObject>> result =
            new HashSet<>();
        for (PlatformComponent component: PlatformComponent.values()) {
            result.add(component.getMXBeanInterface());
        }
        return Collections.unmodifiableSet(result);
    }

    private static final String NOTIF_EMITTER =
        "javax.management.NotificationEmitter";

    Registers an MXBean.
/**
     * Registers an MXBean.
     */
    private static void addMXBean(final MBeanServer mbs, final PlatformManagedObject pmo) {
        // Make DynamicMBean out of MXBean by wrapping it with a StandardMBean
        try {
            AccessController.doPrivileged(new PrivilegedExceptionAction<Void>() {
                public Void run() throws InstanceAlreadyExistsException,
                                         MBeanRegistrationException,
                                         NotCompliantMBeanException {
                    final DynamicMBean dmbean;
                    if (pmo instanceof DynamicMBean) {
                        dmbean = DynamicMBean.class.cast(pmo);
                    } else if (pmo instanceof NotificationEmitter) {
                        dmbean = new StandardEmitterMBean(pmo, null, true, (NotificationEmitter) pmo);
                    } else {
                        dmbean = new StandardMBean(pmo, null, true);
                    }

                    mbs.registerMBean(dmbean, pmo.getObjectName());
                    return null;
                }
            });
        } catch (PrivilegedActionException e) {
            throw new RuntimeException(e.getException());
        }
    }

    Registers a DynamicMBean.
/**
     * Registers a DynamicMBean.
     */
    private static void addDynamicMBean(final MBeanServer mbs,
                                        final DynamicMBean dmbean,
                                        final ObjectName on) {
        try {
            AccessController.doPrivileged(new PrivilegedExceptionAction<Void>() {
                @Override
                public Void run() throws InstanceAlreadyExistsException,
                                         MBeanRegistrationException,
                                         NotCompliantMBeanException {
                    mbs.registerMBean(dmbean, on);
                    return null;
                }
            });
        } catch (PrivilegedActionException e) {
            throw new RuntimeException(e.getException());
        }
    }
}
Management Interface	ObjectName
`ClassLoadingMXBean`	`java.lang:type=ClassLoading`
`MemoryMXBean`	`java.lang:type=Memory`
`ThreadMXBean`	`java.lang:type=Threading`
`RuntimeMXBean`	`java.lang:type=Runtime`
`OperatingSystemMXBean`	`java.lang:type=OperatingSystem`
`PlatformLoggingMXBean`	`java.util.logging:type=Logging`
Management Interface	ObjectName
`GarbageCollectorMXBean`	`java.lang:type=GarbageCollector,name=`collector's name
`MemoryManagerMXBean`	`java.lang:type=MemoryManager,name=`manager's name
`MemoryPoolMXBean`	`java.lang:type=MemoryPool,name=`pool's name
`BufferPoolMXBean`	`java.nio:type=BufferPool,name=`pool name
Author:	Mandy Chung
See Also:	* JMX Specification * Ways to Access Management Metrics MXBean
Since:	1.5
Throws:	SecurityException – if there is a security manager and the caller does not have the permission required by `MBeanServerFactory.createMBeanServer`.
See Also:	MBeanServerFactory MBeanServerFactory.createMBeanServer
Returns:	the platform `MBeanServer`; the platform MXBeans are registered into the platform `MBeanServer` at the first time this method is called.
Params:	connection – the `MBeanServerConnection` to forward to. mxbeanName – the name of a platform MXBean within `connection` to forward to. `mxbeanName` must be in the format of `ObjectName`. mxbeanInterface – the MXBean interface to be implemented by the proxy.
Type parameters:	<T> – an `mxbeanInterface` type parameter
Throws:	IllegalArgumentException – if `mxbeanName` is not with a valid `ObjectName` format, or the named MXBean in the `connection` is not a MXBean provided by the platform, or the named MXBean is not registered in the `MBeanServerConnection`, or the named MXBean is not an instance of the given `mxbeanInterface` IOException – if a communication problem occurred when accessing the `MBeanServerConnection`.
Returns:	a proxy for a platform MXBean interface of a given MXBean name that forwards its method calls through the given `MBeanServerConnection`, or `null` if not exist.
Params:	mxbeanInterface – a management interface for a platform MXBean with one single instance in the Java virtual machine if implemented.
Type parameters:	<T> – an `mxbeanInterface` type parameter
Throws:	IllegalArgumentException – if `mxbeanInterface` is not a platform management interface or not a singleton platform MXBean.
Returns:	the platform MXBean that implements `mxbeanInterface`, or `null` if not exist.
Since:	1.7
Returns:	the set of `Class` objects, subinterface of `PlatformManagedObject` representing the management interfaces for monitoring and managing the Java platform.
Since:	1.7
/

java/ 8/ java/lang/management/ManagementFactory.java

Platform MXBeans

1. Direct access to an MXBean interface

2. Indirect access to an MXBean interface via MBeanServer
