MemoryManagerMXBean


1   /*
2    * @(#)MemoryManagerMXBean.java 1.10 04/04/20
3    *
4    * Copyright 2004 Sun Microsystems, Inc. All rights reserved.
5    * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
6    */
7   
8   package java.lang.management;
9   
10  /**
11   * The management interface for a memory manager.
12   * A memory manager manages one or more memory pools of the 
13   * Java virtual machine.
14   *
15   * <p> A Java virtual machine has one or more memory managers.
16   * An instance implementing this interface is
17   * an <a HREF="ManagementFactory.html#MXBean">MXBean</a>
18   * that can be obtained by calling
19   * the {@link ManagementFactory#getMemoryManagerMXBeans} method or
20   * from the {@link ManagementFactory#getPlatformMBeanServer
21   * platform <tt>MBeanServer</tt>} method.
22   *
23   * <p>The <tt>ObjectName</tt> for uniquely identifying the MXBean for
24   * a memory manager within an MBeanServer is:
25   * <blockquote>
26   *   {@link ManagementFactory#MEMORY_MANAGER_MXBEAN_DOMAIN_TYPE
27   *    <tt>java.lang:type=MemoryManager</tt>}<tt>,name=</tt><i>manager's name</i>
28   * </blockquote>
29   *
30   * @see MemoryMXBean
31   *
32   * @see <a HREF="../../../javax/management/package-summary.html">
33   *      JMX Specification.</a>
34   * @see <a HREF="package-summary.html#examples">
35   *      Ways to Access MXBeans</a>
36   *
37   * @author  Mandy Chung
38   * @version 1.10, 04/20/04 
39   * @since   1.5
40   */
41  public interface MemoryManagerMXBean {
42      /**
43       * Returns the name representing this memory manager.
44       *
45       * @return the name of this memory manager.
46       */
47      public String   getName();
48  
49      /**
50       * Tests if this memory manager is valid in the Java virtual
51       * machine.  A memory manager becomes invalid once the Java virtual
52       * machine removes it from the memory system.
53       *
54       * @return <tt>true</tt> if the memory manager is valid in the 
55       *               Java virtual machine;
56       *         <tt>false</tt> otherwise.
57       */
58      public boolean isValid();
59  
60      /**
61       * Returns the name of memory pools that this memory manager manages.
62       *
63       * @return an array of <tt>String</tt> objects, each is 
64       * the name of a memory pool that this memory manager manages.
65       */
66      public String  [] getMemoryPoolNames();
67  }
68  
69
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