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JBoss 4.0.1 sp1 jmx API Documentation 英文版文档
MBeanPermission (JBoss/JMX API) - JBoss 4.0.1 sp1 jmx API Documentation 英文版文档
javax.management
Class MBeanPermission
java.lang.Object
java.security.Permission
javax.management.MBeanPermission
- All Implemented Interfaces:
- Guard, Serializable
- public class MBeanPermission
- extends Permission
Permission controlling access to MBeanServer operations. If a security
manager has been set using System.setSecurityManager(java.lang.SecurityManager),
most operations on the MBean Server require that the caller's permissions imply
an MBeanPermission appropriate for the operation. This is described in detail
in the documentation for the MBeanServer interface.
As with other Permission objects, an MBeanPermission can represent either a
permission that you have or a permission that you need. When a sensitive
operation is being checked for permission, an MBeanPermission is constructed
representing the permission you need. The operation is only allowed if the
permissions you have imply the permission you need.
An MBeanPermission contains four items of information:
- The action. For a permission you need, this is one of the actions in the
list below. For a permission you have, this is a comma-separated list of those
actions, or *, representing all actions.
The action is returned by getActions().
- The class name.
For a permission you need, this is the class name of an MBean you are
accessing, as returned by MBeanServer.getMBeanInfo(name).getClassName().
Certain operations do not reference a class name, in which case the class
name is null.
For a permission you have, this is either empty or a class name pattern.
A class name pattern is a string following the Java conventions for
dot-separated class names. It may end with ".*" meaning that the permission
grants access to any class that begins with the string preceding ".*". For
instance, "javax.management.*" grants access to
javax.management.MBeanServerDelegate and javax.management.timer.Timer,
among other classes.
A class name pattern can also be empty or the single character "*", both
of which grant access to any class.
- The member.
For a permission you need, this is the name of the attribute or operation
you are accessing. For operations that do not reference an attribute or
operation, the member is null.
For a permission you have, this is either the name of an attribute or
operation you can access, or it is empty or the single character "*", both of
which grant access to any member.
- The object name.
For a permission you need, this is the ObjectName of the MBean you are
accessing. For operations that do not reference a single MBean, it is null.
It is never an object name pattern.
For a permission you have, this is the ObjectName of the MBean or MBeans
you can access. It may be an object name pattern to grant access to all MBeans
whose names match the pattern. It may also be empty, which grants access to all
MBeans whatever their name.
If you have an MBeanPermission, it allows operations only if all four of the
items match.
The class name, member, and object name can be written together as a single
string, which is the name of this permission. The name of the permission is
the string returned by getName(). The format of the string is:
className#member[objectName]
The object name is written using the usual syntax for ObjectName. It may
contain any legal characters, including ]. It is terminated by a ] character
that is the last character in the string.
One or more of the className, member, or objectName may be omitted. If the
member is omitted, the # may be too (but does not have to be). If the
objectName is omitted, the [] may be too (but does not have to be). It is not
legal to omit all three items, that is to have a name that is the empty string.
One or more of the className, member, or objectName may be the character "-",
which is equivalent to a null value. A null value is implied by any value
(including another null value) but does not imply any other value.
The possible actions are these:
addNotificationListener
getAttribute
getClassLoader
getClassLoaderFor
getClassLoaderRepository
getDomains
getMBeanInfo
getObjectInstance
instantiate
invoke
isInstanceOf
queryMBeans
queryNames
registerMBean
removeNotificationListener
setAttribute
unregisterMBean
In a comma-separated list of actions, spaces are allowed before and after each
action.
- Version:
- $Revision: 1.7 $
- Author:
- Thomas Diesler., Scott.Stark@jboss.org
- See Also:
- Serialized Form
|
Method Summary |
boolean |
equals(Object p)
Checks two MBeanPermission objects for equality. |
String |
getActions()
Returns the "canonical string representation" of the actions. |
int |
hashCode()
Returns the hash code value for this object. |
boolean |
implies(Permission p)
Checks if this MBeanPermission object "implies" the specified permission. |
MBeanPermission
public MBeanPermission(String name,
String actions)
- Create a new MBeanPermission object with the specified target name and actions.
The target name is of the form "className#member[objectName]" where each
part is optional. It must not be empty or null.
The actions parameter contains a comma-separated list of the desired
actions granted on the target name. It must not be empty or null.
- Parameters:
name - the triplet "className#member[objectName]".actions - the action string.
- Throws:
IllegalArgumentException - if the name or actions is invalid.
MBeanPermission
public MBeanPermission(String className,
String member,
ObjectName objectName,
String actions)
- Create a new MBeanPermission object with the specified target name
(class name, member, object name) and actions.
The class name, member and object name parameters define a target name of
the form "className#member[objectName]" where each part is optional. This
will be the result of Permission.getName() on the resultant
MBeanPermission.
The actions parameter contains a comma-separated list of the desired
actions granted on the target name. It must not be empty or null.
- Parameters:
className - the class name to which this permission applies. May be
null or "-", which represents a class name that is implied by any class
name but does not imply any other class name.member - the member to which this permission applies. May be null or
"-", which represents a member that is implied by any member but does not
imply any other member.objectName - the object name to which this permission applies. May
be null, which represents an object name that is implied by any object
name but does not imply any other object name.actions - the action string.
getActions
public String getActions()
- Returns the "canonical string representation" of the actions.
That is, this method always returns present actions in alphabetical order.
- Returns:
- the canonical string representation of the actions.
hashCode
public int hashCode()
- Returns the hash code value for this object.
- Returns:
- a hash code value for this object.
implies
public boolean implies(Permission p)
- Checks if this MBeanPermission object "implies" the specified permission.
More specifically, this method returns true if:
- p is an instance of MBeanPermission; and
- p has a null className or p's className matches this object's
className; and
- p has a null member or p's member matches this object's member; and
- p has a null object name name or or p's object name matches this
object's object name; and
- p's actions are a subset of this object's actions
If this object's className is "*", p's className always matches it. If it
is "a.*", p's className matches it if it begins with "a.".
If this object's member is "*", p's member always matches it.
If this object's objectName n1 is an object name pattern, p's objectName
n2 matches it if n1.equals(n2) or if n1.apply(n2).
A permission that includes the queryMBeans action is considered to include
queryNames as well.
- Parameters:
p - the permission to check against.
- Returns:
- true if the specified permission is implied by this object, false
if not.
equals
public boolean equals(Object p)
- Checks two MBeanPermission objects for equality. Checks that obj is an
MBeanPermission, and has the same name and actions as this object.
- Parameters:
p - the object we are testing for equality with this object.
- Returns:
- true if obj is an MBeanPermission, and has the same name and
actions as this MBeanPermission object.
Copyright © 2002 JBoss Group, LLC. All Rights Reserved.
