MBeanServerBuilder


1   /*
2    * @(#)MBeanServerBuilder.java  1.18 03/12/19
3    * 
4    * Copyright 2004 Sun Microsystems, Inc. All rights reserved.
5    * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
6    */
7   
8   package javax.management;
9   
10  import com.sun.jmx.mbeanserver.JmxMBeanServer;
11  
12  /**
13   * <p>This class represents a builder that creates a default 
14   * {@link javax.management.MBeanServer} implementation. 
15   * The JMX {@link javax.management.MBeanServerFactory} allows 
16   * applications to provide their custom MBeanServer 
17   * implementation by providing a subclass of this class.</p>
18   *
19   * @see MBeanServer
20   * @see MBeanServerFactory
21   *
22   * @since 1.5
23   * @since.unbundled JMX 1.2
24   */
25  public class MBeanServerBuilder {
26      /**
27       * Public default constructor.
28       **/
29      public MBeanServerBuilder() {
30      }
31  
32      /**
33       * This method creates a new MBeanServerDelegate for a new MBeanServer.
34       * When creating a new MBeanServer the 
35       * {@link javax.management.MBeanServerFactory} first calls this method
36       * in order to create a new MBeanServerDelegate.
37       * <br>Then it calls 
38       * <code>newMBeanServer(defaultDomain,outer,delegate)</code>
39       * passing the <var>delegate</var> that should be used by the MBeanServer 
40       * implementation.
41       * <p>Note that the passed <var>delegate</var> might not be directly the 
42       * MBeanServerDelegate that was returned by this method. It could
43       * be, for instance, a new object wrapping the previously 
44       * returned object.
45       *
46       * @return A new {@link javax.management.MBeanServerDelegate}.
47       **/
48      public MBeanServerDelegate   newMBeanServerDelegate() {
49      return JmxMBeanServer.newMBeanServerDelegate();
50      }
51  
52      /**
53       * This method creates a new MBeanServer implementation object.
54       * When creating a new MBeanServer the 
55       * {@link javax.management.MBeanServerFactory} first calls  
56       * <code>newMBeanServerDelegate()</code> in order to obtain a new 
57       * {@link javax.management.MBeanServerDelegate} for the new 
58       * MBeanServer. Then it calls 
59       * <code>newMBeanServer(defaultDomain,outer,delegate)</code>
60       * passing the <var>delegate</var> that should be used by the MBeanServer 
61       * implementation.
62       * <p>Note that the passed <var>delegate</var> might not be directly the 
63       * MBeanServerDelegate that was returned by this implementation. It could
64       * be, for instance, a new object wrapping the previously 
65       * returned delegate.
66       * <p>The <var>outer</var> parameter is a pointer to the MBeanServer that
67       * should be passed to the {@link javax.management.MBeanRegistration} 
68       * interface when registering MBeans inside the MBeanServer.
69       * If <var>outer</var> is <code>null</code>, then the MBeanServer 
70       * implementation must use its own <code>this</code> reference when
71       * invoking the {@link javax.management.MBeanRegistration} interface.
72       * <p>This makes it possible for a MBeanServer implementation to wrap
73       * another MBeanServer implementation, in order to implement, e.g,
74       * security checks, or to prevent access to the actual MBeanServer
75       * implementation by returning a pointer to a wrapping object.
76       *
77       * @param defaultDomain Default domain of the new MBeanServer.
78       * @param outer A pointer to the MBeanServer object that must be
79       *        passed to the MBeans when invoking their
80       *        {@link javax.management.MBeanRegistration} interface.
81       * @param delegate A pointer to the MBeanServerDelegate associated
82       *        with the new MBeanServer. The new MBeanServer must register
83       *        this MBean in its MBean repository.
84       *
85       * @return A new private implementation of an MBeanServer.
86       **/
87      public MBeanServer   newMBeanServer(String                defaultDomain, 
88                        MBeanServer           outer, 
89                        MBeanServerDelegate   delegate) {
90      // By default, MBeanServerInterceptors are disabled.
91      // Use com.sun.jmx.mbeanserver.MBeanServerBuilder to obtain
92      // MBeanServers on which MBeanServerInterceptors are enabled.
93      return JmxMBeanServer.newMBeanServer(defaultDomain,outer,delegate,
94                           false);
95      }
96  } 
97
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