Module java.management

Package javax.management.modelmbean

Class ModelMBeanInfoSupport

java.lang.Object

javax.management.MBeanInfo

javax.management.modelmbean.ModelMBeanInfoSupport

All Implemented Interfaces:

Serializable, Cloneable, DescriptorRead, ModelMBeanInfo

public class ModelMBeanInfoSupport
extends MBeanInfo
implements ModelMBeanInfo

This class represents the meta data for ModelMBeans. Descriptors have been added on the meta data objects.

Java resources wishing to be manageable instantiate the ModelMBean using the MBeanServer's createMBean method. The resource then sets the ModelMBeanInfo and Descriptors for the ModelMBean instance. The attributes and operations exposed via the ModelMBeanInfo for the ModelMBean are accessible from MBeans, connectors/adaptors like other MBeans. Through the Descriptors, values and methods in the managed application can be defined and mapped to attributes and operations of the ModelMBean. This mapping can be defined during development in a file or dynamically and programmatically at runtime.

Every ModelMBean which is instantiated in the MBeanServer becomes manageable: its attributes and operations become remotely accessible through the connectors/adaptors connected to that MBeanServer. A Java object cannot be registered in the MBeanServer unless it is a JMX compliant MBean. By instantiating a ModelMBean, resources are guaranteed that the MBean is valid. MBeanException and RuntimeOperationsException must be thrown on every public method. This allows for wrapping exceptions from distributed communications (RMI, EJB, etc.)

The serialVersionUID of this class is -1935722590756516193L.

Since:

1.5

See Also:

• Serialized Form

Constructor Summary

Constructors

Constructor	Description
ModelMBeanInfoSupport(String className, String description, ModelMBeanAttributeInfo[] attributes, ModelMBeanConstructorInfo[] constructors, ModelMBeanOperationInfo[] operations, ModelMBeanNotificationInfo[] notifications)	Creates a ModelMBeanInfoSupport with the provided information, but the descriptor is a default.
ModelMBeanInfoSupport(String className, String description, ModelMBeanAttributeInfo[] attributes, ModelMBeanConstructorInfo[] constructors, ModelMBeanOperationInfo[] operations, ModelMBeanNotificationInfo[] notifications, Descriptor mbeandescriptor)	Creates a ModelMBeanInfoSupport with the provided information and the descriptor given in parameter.
ModelMBeanInfoSupport(ModelMBeanInfo mbi)	Constructs a ModelMBeanInfoSupport which is a duplicate of the given ModelMBeanInfo.

Method Summary

Modifier and Type	Method	Description
Object	clone()	Returns a shallow clone of this instance.
ModelMBeanAttributeInfo	getAttribute(String inName)	Returns a ModelMBeanAttributeInfo requested by name.
ModelMBeanConstructorInfo	getConstructor(String inName)	Returns the ModelMBeanConstructorInfo requested by name.
Descriptor	getDescriptor()	Get the descriptor of this MBeanInfo.
Descriptor	getDescriptor(String inDescriptorName)	Returns a Descriptor requested by name.
Descriptor	getDescriptor(String inDescriptorName, String inDescriptorType)	Returns a Descriptor requested by name and descriptorType.
Descriptor[]	getDescriptors(String inDescriptorType)	Returns a Descriptor array consisting of all Descriptors for the ModelMBeanInfo of type inDescriptorType.
Descriptor	getMBeanDescriptor()	Returns the ModelMBean's descriptor which contains MBean wide policies.
ModelMBeanNotificationInfo	getNotification(String inName)	Returns a ModelMBeanNotificationInfo requested by name.
ModelMBeanOperationInfo	getOperation(String inName)	Returns a ModelMBeanOperationInfo requested by name.
void	setDescriptor(Descriptor inDescriptor, String inDescriptorType)	Sets descriptors in the info array of type inDescriptorType for the ModelMBean.
void	setDescriptors(Descriptor[] inDescriptors)	Adds or replaces descriptors in the ModelMBeanInfo.
void	setMBeanDescriptor(Descriptor inMBeanDescriptor)	Sets the ModelMBean's descriptor.

Methods declared in class javax.management.MBeanInfo

equals, getAttributes, getClassName, getConstructors, getDescription, getNotifications, getOperations

Methods declared in class java.lang.Object

finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods declared in interface javax.management.modelmbean.ModelMBeanInfo

getAttributes, getClassName, getConstructors, getDescription, getNotifications, getOperations

Constructor Details

ModelMBeanInfoSupport

public ModelMBeanInfoSupport(ModelMBeanInfo mbi)

Constructs a ModelMBeanInfoSupport which is a duplicate of the given ModelMBeanInfo. The returned object is a shallow copy of the given object. Neither the Descriptor nor the contained arrays (ModelMBeanAttributeInfo[] etc) are cloned. This method is chiefly of interest to modify the Descriptor of the returned instance via setDescriptor without affecting the Descriptor of the original object.

Parameters:

mbi - the ModelMBeanInfo instance from which the ModelMBeanInfo being created is initialized.

ModelMBeanInfoSupport

public ModelMBeanInfoSupport(String className,
 String description,
 ModelMBeanAttributeInfo[] attributes,
 ModelMBeanConstructorInfo[] constructors,
 ModelMBeanOperationInfo[] operations,
 ModelMBeanNotificationInfo[] notifications)

Creates a ModelMBeanInfoSupport with the provided information, but the descriptor is a default. The default descriptor is: name=className, descriptorType="mbean", displayName=className, persistPolicy="never", log="F", visibility="1"

Parameters:

className - classname of the MBean

description - human readable description of the ModelMBean

attributes - array of ModelMBeanAttributeInfo objects which have descriptors

constructors - array of ModelMBeanConstructorInfo objects which have descriptors

operations - array of ModelMBeanOperationInfo objects which have descriptors

notifications - array of ModelMBeanNotificationInfo objects which have descriptors

ModelMBeanInfoSupport

public ModelMBeanInfoSupport(String className,
 String description,
 ModelMBeanAttributeInfo[] attributes,
 ModelMBeanConstructorInfo[] constructors,
 ModelMBeanOperationInfo[] operations,
 ModelMBeanNotificationInfo[] notifications,
 Descriptor mbeandescriptor)

Creates a ModelMBeanInfoSupport with the provided information and the descriptor given in parameter.

Parameters:

className - classname of the MBean

description - human readable description of the ModelMBean

attributes - array of ModelMBeanAttributeInfo objects which have descriptors

constructors - array of ModelMBeanConstructorInfo objects which have descriptor

operations - array of ModelMBeanOperationInfo objects which have descriptor

notifications - array of ModelMBeanNotificationInfo objects which have descriptor

mbeandescriptor - descriptor to be used as the MBeanDescriptor containing MBean wide policy. If the descriptor is null, a default descriptor will be constructed. The default descriptor is: name=className, descriptorType="mbean", displayName=className, persistPolicy="never", log="F", visibility="1". If the descriptor does not contain all of these fields, the missing ones are added with these default values.

Throws:

RuntimeOperationsException - Wraps an IllegalArgumentException for invalid descriptor passed in parameter. (see getMBeanDescriptor for the definition of a valid MBean descriptor.)

Method Details

clone

public Object clone()

Returns a shallow clone of this instance. Neither the Descriptor nor the contained arrays (ModelMBeanAttributeInfo[] etc) are cloned. This method is chiefly of interest to modify the Descriptor of the clone via setDescriptor without affecting the Descriptor of the original object.

Specified by:

clone in interface ModelMBeanInfo

Overrides:

clone in class MBeanInfo

Returns:

a shallow clone of this instance.

See Also:

• Cloneable

getDescriptors

public Descriptor[] getDescriptors(String inDescriptorType)
                            throws MBeanException,
RuntimeOperationsException

Description copied from interface: ModelMBeanInfo

Returns a Descriptor array consisting of all Descriptors for the ModelMBeanInfo of type inDescriptorType.

Specified by:

getDescriptors in interface ModelMBeanInfo

Parameters:

inDescriptorType - value of descriptorType field that must be set for the descriptor to be returned. Must be "mbean", "attribute", "operation", "constructor" or "notification". If it is null or empty then all types will be returned.

Returns:

Descriptor array containing all descriptors for the ModelMBean if type inDescriptorType.

Throws:

MBeanException - Wraps a distributed communication Exception.

RuntimeOperationsException - Wraps an IllegalArgumentException when the descriptorType in parameter is not one of: "mbean", "attribute", "operation", "constructor", "notification", empty or null.

See Also:

• ModelMBeanInfo.setDescriptors(javax.management.Descriptor[])

setDescriptors

public void setDescriptors(Descriptor[] inDescriptors)
                    throws MBeanException,
RuntimeOperationsException

Description copied from interface: ModelMBeanInfo

Adds or replaces descriptors in the ModelMBeanInfo.

Specified by:

setDescriptors in interface ModelMBeanInfo

Parameters:

inDescriptors - The descriptors to be set in the ModelMBeanInfo. Null elements of the list will be ignored. All descriptors must have name and descriptorType fields.

Throws:

MBeanException - Wraps a distributed communication Exception.

RuntimeOperationsException - Wraps an IllegalArgumentException for a null or invalid descriptor.

See Also:

• ModelMBeanInfo.getDescriptors(java.lang.String)

getDescriptor

public Descriptor getDescriptor(String inDescriptorName)
                         throws MBeanException,
RuntimeOperationsException

Returns a Descriptor requested by name.

Parameters:

inDescriptorName - The name of the descriptor.

Returns:

Descriptor containing a descriptor for the ModelMBean with the same name. If no descriptor is found, null is returned.

Throws:

MBeanException - Wraps a distributed communication Exception.

RuntimeOperationsException - Wraps an IllegalArgumentException for null name.

See Also:

• setDescriptor(javax.management.Descriptor, java.lang.String)

getDescriptor

public Descriptor getDescriptor(String inDescriptorName,
 String inDescriptorType)
                         throws MBeanException,
RuntimeOperationsException

Description copied from interface: ModelMBeanInfo

Returns a Descriptor requested by name and descriptorType.

Specified by:

getDescriptor in interface ModelMBeanInfo

Parameters:

inDescriptorName - The name of the descriptor.

inDescriptorType - The type of the descriptor being requested. If this is null or empty then all types are searched. Valid types are 'mbean', 'attribute', 'constructor' 'operation', and 'notification'. This value will be equal to the 'descriptorType' field in the descriptor that is returned.

Returns:

Descriptor containing the descriptor for the ModelMBean with the same name and descriptorType. If no descriptor is found, null is returned.

Throws:

MBeanException - Wraps a distributed communication Exception.

RuntimeOperationsException - Wraps an IllegalArgumentException for a null descriptor name or null or invalid type. The type must be "mbean","attribute", "constructor", "operation", or "notification".

See Also:

• ModelMBeanInfo.setDescriptor(javax.management.Descriptor, java.lang.String)

setDescriptor

public void setDescriptor(Descriptor inDescriptor,
 String inDescriptorType)
                   throws MBeanException,
RuntimeOperationsException

Description copied from interface: ModelMBeanInfo

Sets descriptors in the info array of type inDescriptorType for the ModelMBean. The setDescriptor method of the corresponding ModelMBean*Info will be called to set the specified descriptor.

Specified by:

setDescriptor in interface ModelMBeanInfo

Parameters:

inDescriptor - The descriptor to be set in the ModelMBean. It must NOT be null. All descriptors must have name and descriptorType fields.

inDescriptorType - The type of the descriptor being set. If this is null then the descriptorType field in the descriptor is used. If specified this value must be set in the descriptorType field in the descriptor. Must be "mbean","attribute", "constructor", "operation", or "notification".

Throws:

MBeanException - Wraps a distributed communication Exception.

RuntimeOperationsException - Wraps an IllegalArgumentException for illegal or null arguments or if the name field of the descriptor is not found in the corresponding MBeanAttributeInfo or MBeanConstructorInfo or MBeanNotificationInfo or MBeanOperationInfo.

See Also:

• ModelMBeanInfo.getDescriptor(java.lang.String, java.lang.String)

getAttribute

public ModelMBeanAttributeInfo getAttribute(String inName)
                                     throws MBeanException,
RuntimeOperationsException

Description copied from interface: ModelMBeanInfo

Returns a ModelMBeanAttributeInfo requested by name.

Specified by:

getAttribute in interface ModelMBeanInfo

Parameters:

inName - The name of the ModelMBeanAttributeInfo to get. If no ModelMBeanAttributeInfo exists for this name null is returned.

Returns:

the attribute info for the named attribute, or null if there is none.

Throws:

MBeanException - Wraps a distributed communication Exception.

RuntimeOperationsException - Wraps an IllegalArgumentException for a null attribute name.

getOperation

public ModelMBeanOperationInfo getOperation(String inName)
                                     throws MBeanException,
RuntimeOperationsException

Description copied from interface: ModelMBeanInfo

Returns a ModelMBeanOperationInfo requested by name.

Specified by:

getOperation in interface ModelMBeanInfo

Parameters:

inName - The name of the ModelMBeanOperationInfo to get. If no ModelMBeanOperationInfo exists for this name null is returned.

Returns:

the operation info for the named operation, or null if there is none.

Throws:

MBeanException - Wraps a distributed communication Exception.

RuntimeOperationsException - Wraps an IllegalArgumentException for a null operation name.

getConstructor

public ModelMBeanConstructorInfo getConstructor(String inName)
                                         throws MBeanException,
RuntimeOperationsException

Returns the ModelMBeanConstructorInfo requested by name. If no ModelMBeanConstructorInfo exists for this name null is returned.

Parameters:

inName - the name of the constructor.

Returns:

the constructor info for the named constructor, or null if there is none.

Throws:

MBeanException - Wraps a distributed communication Exception.

RuntimeOperationsException - Wraps an IllegalArgumentException for a null constructor name.

getNotification

public ModelMBeanNotificationInfo getNotification(String inName)
                                           throws MBeanException,
RuntimeOperationsException

Description copied from interface: ModelMBeanInfo

Returns a ModelMBeanNotificationInfo requested by name.

Specified by:

getNotification in interface ModelMBeanInfo

Parameters:

inName - The name of the ModelMBeanNotificationInfo to get. If no ModelMBeanNotificationInfo exists for this name null is returned.

Returns:

the info for the named notification, or null if there is none.

Throws:

MBeanException - Wraps a distributed communication Exception.

RuntimeOperationsException - Wraps an IllegalArgumentException for a null notification name.

getDescriptor

public Descriptor getDescriptor()

Description copied from class: MBeanInfo

Get the descriptor of this MBeanInfo. Changing the returned value will have no affect on the original descriptor.

Specified by:

getDescriptor in interface DescriptorRead

Overrides:

getDescriptor in class MBeanInfo

Returns:

a descriptor that is either immutable or a copy of the original.

Since:

1.6

getMBeanDescriptor

public Descriptor getMBeanDescriptor()
                              throws MBeanException

Description copied from interface: ModelMBeanInfo

Returns the ModelMBean's descriptor which contains MBean wide policies. This descriptor contains metadata about the MBean and default policies for persistence and caching.

The fields in the descriptor are defined, but not limited to, the following. Note that when the Type in this table is Number, a String that is the decimal representation of a Long can also be used.

ModelMBean Fields

Name	Type	Meaning
name	String	MBean name.
descriptorType	String	Must be "mbean".
displayName	String	Name of MBean to be used in displays.
persistPolicy	String	One of: OnUpdate|OnTimer|NoMoreOftenThan|OnUnregister|Always|Never. See the section "MBean Descriptor Fields" in the JMX specification document.
persistLocation	String	The fully qualified directory name where the MBean should be persisted (if appropriate).
persistFile	String	File name into which the MBean should be persisted.
persistPeriod	Number	Frequency of persist cycle in seconds, for OnTime and NoMoreOftenThan PersistPolicy
currencyTimeLimit	Number	How long cached value is valid: <0 never, =0 always, >0 seconds.
log	String	t: log all notifications, f: log no notifications.
logfile	String	Fully qualified filename to log events to.
visibility	Number	1-4 where 1: always visible 4: rarely visible.
export	String	Name to be used to export/expose this MBean so that it is findable by other JMX Agents.
presentationString	String	XML formatted string to allow presentation of data to be associated with the MBean.

The default descriptor is: name=className,descriptorType="mbean", displayName=className, persistPolicy="never",log="F",visibility="1" If the descriptor does not contain all these fields, they will be added with these default values.

Note: because of inconsistencies in previous versions of this specification, it is recommended not to use negative or zero values for currencyTimeLimit. To indicate that a cached value is never valid, omit the currencyTimeLimit field. To indicate that it is always valid, use a very large number for this field.

Specified by:

getMBeanDescriptor in interface ModelMBeanInfo

Returns:

the MBean descriptor.

Throws:

MBeanException - Wraps a distributed communication Exception.

See Also:

• ModelMBeanInfo.setMBeanDescriptor(javax.management.Descriptor)

setMBeanDescriptor

public void setMBeanDescriptor(Descriptor inMBeanDescriptor)
                        throws MBeanException,
RuntimeOperationsException

Description copied from interface: ModelMBeanInfo

Sets the ModelMBean's descriptor. This descriptor contains default, MBean wide metadata about the MBean and default policies for persistence and caching. This operation does a complete replacement of the descriptor, no merging is done. If the descriptor to set to is null then the default descriptor will be created. The default descriptor is: name=className,descriptorType="mbean", displayName=className, persistPolicy="never",log="F",visibility="1" If the descriptor does not contain all these fields, they will be added with these default values. See getMBeanDescriptor method javadoc for description of valid field names.

Specified by:

setMBeanDescriptor in interface ModelMBeanInfo

Parameters:

inMBeanDescriptor - the descriptor to set.

Throws:

MBeanException - Wraps a distributed communication Exception.

RuntimeOperationsException - Wraps an IllegalArgumentException for invalid descriptor.

See Also:

• ModelMBeanInfo.getMBeanDescriptor()