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:

  • 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:

    • 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:

    • 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:

    • 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:

    • 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:

    • 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:

    • 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
      NameTypeMeaning
      nameString MBean name.
      descriptorTypeString Must be "mbean".
      displayNameString Name of MBean to be used in displays.
      persistPolicyString One of: OnUpdate|OnTimer|NoMoreOftenThan|OnUnregister|Always|Never. See the section "MBean Descriptor Fields" in the JMX specification document.
      persistLocationString The fully qualified directory name where the MBean should be persisted (if appropriate).
      persistFileString File name into which the MBean should be persisted.
      persistPeriodNumber Frequency of persist cycle in seconds, for OnTime and NoMoreOftenThan PersistPolicy
      currencyTimeLimitNumber How long cached value is valid: <0 never, =0 always, >0 seconds.
      logString t: log all notifications, f: log no notifications.
      logfileString Fully qualified filename to log events to.
      visibilityNumber 1-4 where 1: always visible 4: rarely visible.
      exportString Name to be used to export/expose this MBean so that it is findable by other JMX Agents.
      presentationStringString 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:

    • 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: