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Java™ Platform Standard Ed. 6 |
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See:
Description
Interface Summary | |
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CompositeData | The CompositeData interface specifies the behavior of a specific type of complex open data objects which represent composite data structures. |
CompositeDataView | A Java class can implement this interface to indicate how it is
to be converted into a CompositeData by the MXBean framework. |
OpenMBeanAttributeInfo | Describes an attribute of an open MBean. |
OpenMBeanConstructorInfo | Describes a constructor of an Open MBean. |
OpenMBeanInfo | Describes an Open MBean: an Open MBean is recognized as such if
its getMBeanInfo() method returns an instance of a class which
implements the OpenMBeanInfo interface, typically OpenMBeanInfoSupport . |
OpenMBeanOperationInfo | Describes an operation of an Open MBean. |
OpenMBeanParameterInfo | Describes a parameter used in one or more operations or constructors of an open MBean. |
TabularData | The TabularData interface specifies the behavior of a specific type of complex open data objects which represent tabular data structures. |
Class Summary | |
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ArrayType<T> | The ArrayType class is the open type class whose instances describe
all open data values which are n-dimensional arrays of open data values. |
CompositeDataInvocationHandler | An InvocationHandler that forwards getter methods to a
CompositeData . |
CompositeDataSupport | The CompositeDataSupport class is the open data class which implements the CompositeData interface. |
CompositeType | The CompositeType class is the open type class
whose instances describe the types of values. |
OpenMBeanAttributeInfoSupport | Describes an attribute of an open MBean. |
OpenMBeanConstructorInfoSupport | Describes a constructor of an Open MBean. |
OpenMBeanInfoSupport | The OpenMBeanInfoSupport class describes the management
information of an open MBean: it is a subclass of MBeanInfo , and it implements the OpenMBeanInfo interface. |
OpenMBeanOperationInfoSupport | Describes an operation of an Open MBean. |
OpenMBeanParameterInfoSupport | Describes a parameter used in one or more operations or constructors of an open MBean. |
OpenType<T> | The OpenType class is the parent abstract class of all classes which describe the actual open type
of open data values. |
SimpleType<T> | The SimpleType class is the open type class whose instances describe
all open data values which are neither arrays,
nor values,
nor values. |
TabularDataSupport | The TabularDataSupport class is the open data class which implements the TabularData and the Map interfaces, and which is internally based on a hash map data structure. |
TabularType | The TabularType class is the open type class
whose instances describe the types of values. |
Exception Summary | |
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InvalidKeyException | This runtime exception is thrown to indicate that a method parameter which was expected to be an item name of a composite data or a row index of a tabular data is not valid. |
InvalidOpenTypeException | This runtime exception is thrown to indicate that the open type of an open data value is not the one expected. |
KeyAlreadyExistsException | This runtime exception is thrown to indicate that the index of a row to be added to a tabular data instance is already used to refer to another row in this tabular data instance. |
OpenDataException | This checked exception is thrown when an open type, an open data or an open MBean metadata info instance could not be constructed because one or more validity constraints were not met. |
Provides the open data types and Open MBean descriptor classes. An Open MBean is an MBean where the types of attributes and of operation parameters and return values are built using a small set of predefined Java classes. Open MBeans facilitate operation with remote management programs that do not necessarily have access to application-specific types, including non-Java programs.
Every MBean has an MBeanInfo
with information about the MBean itself, and its
attributes, operations, constructors, and notifications. In an
Open MBean, this MBeanInfo
implements the OpenMBeanInfo
interface, usually by being an instance of OpenMBeanInfoSupport
.
The attribute information returned by MBeanInfo.getAttributes
for an Open MBean is an array of
objects implementing OpenMBeanAttributeInfo
, usually instances of OpenMBeanAttributeInfoSupport
. In addition to the usual
information about attributes, an
OpenMBeanAttributeInfo
specifies the OpenType
of the attribute.
The possible OpenType
values are predefined, which
is what ensures that remote managers will understand them.
Similar remarks apply to the parameter types of operations and constructors, and to the return types of operations.
There is a distinction between an attribute's Java language
type, as returned by getType()
, and
its OpenType
, as returned by getOpenType()
. For example, if the Java language type is
java.lang.String
, the OpenType
will be
SimpleType.String
. If the Java language type is CompositeData
, the
OpenType
will be a CompositeType
that
describes the items in the CompositeData
instances
for the attribute.
In Open MBeans, attributes and parameters can have default values
and/or constraints associated with them in the OpenMBeanAttributeInfo
or OpenMBeanParameterInfo
.
There are two ways to specify these constraints. Either the
values are directly specified as parameters to one of the
constructors of OpenMBeanAttributeInfoSupport
or
OpenMBeanParameterInfoSupport
, for example
OpenMBeanParameterInfoSupport.OpenMBeanParameterInfoSupport(
String, String, OpenType, Object, Object[])
; or the values are
specified in a Descriptor
given
as a parameter to one of the constructors.
When a Descriptor
is used, the fields of interest are
these:
defaultValue
defines the value returned by
getDefaultValue()
;
minValue
defines the value returned by getMinValue()
;
maxValue
defines the value returned by getMaxValue()
;
legalValues
defines the values returned by getLegalValues()
.
For defaultValue
, minValue
, and maxValue
, the associated value must either be of the Java type
corresponding to openType
, or be a string that can be
converted into that type. The conversion uses the static method
valueOf(String)
if it finds one; otherwise a constructor
with a single String
parameter if it finds one; otherwise
it fails.
For legalValues
, the associated value must be either
an array or a Set
, and the elements of the array or set
must be convertible as described for defaultValue
etc.
The following conditions must be met for these fields:
legalValues
is present then neither minValue
nor maxValue
must be present;
defaultValue
is present then it must satisfy the
constraints defined by legalValues
, minValue
, or
maxValue
when any of these is also present;
minValue
and maxValue
are both present
then minValue
must not be greater than maxValue
.
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Java™ Platform Standard Ed. 6 |
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Copyright 2008 Sun Microsystems, Inc. All rights reserved. Use is subject to license terms. Also see the documentation redistribution policy.