Module java.management

Package javax.management

Class MBeanOperationInfo

java.lang.Object

javax.management.MBeanFeatureInfo

javax.management.MBeanOperationInfo

All Implemented Interfaces:

Serializable, Cloneable, DescriptorRead

Direct Known Subclasses:

ModelMBeanOperationInfo, OpenMBeanOperationInfoSupport

public class MBeanOperationInfo
extends MBeanFeatureInfo
implements Cloneable

Describes a management operation exposed by an MBean. Instances of this class are immutable. Subclasses may be mutable but this is not recommended.

Since:

1.5

See Also:

• Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
static final int	ACTION	Indicates that the operation is write-like: it has an effect but does not return any information from the MBean.
static final int	ACTION_INFO	Indicates that the operation is both read-like and write-like: it has an effect, and it also returns information from the MBean.
static final int	INFO	Indicates that the operation is read-like: it returns information but does not change any state.
static final int	UNKNOWN	Indicates that the impact of the operation is unknown or cannot be expressed using one of the other values.

Fields declared in class javax.management.MBeanFeatureInfo

description, name

Constructor Summary

Constructors

Constructor	Description
MBeanOperationInfo(String description, Method method)	Constructs an MBeanOperationInfo object.
MBeanOperationInfo(String name, String description, MBeanParameterInfo[] signature, String type, int impact)	Constructs an MBeanOperationInfo object.
MBeanOperationInfo(String name, String description, MBeanParameterInfo[] signature, String type, int impact, Descriptor descriptor)	Constructs an MBeanOperationInfo object.

Method Summary

Modifier and Type	Method	Description
Object	clone()	Returns a shallow clone of this instance.
boolean	equals(Object o)	Compare this MBeanOperationInfo to another.
int	getImpact()	Returns the impact of the method, one of INFO, ACTION, ACTION_INFO, UNKNOWN.
String	getReturnType()	Returns the type of the method's return value.
MBeanParameterInfo[]	getSignature()	Returns the list of parameters for this operation.

Methods declared in class javax.management.MBeanFeatureInfo

getDescription, getDescriptor, getName

Methods declared in class java.lang.Object

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

Field Details

INFO

public static final int INFO

Indicates that the operation is read-like: it returns information but does not change any state.

See Also:

• Constant Field Values

ACTION

public static final int ACTION

Indicates that the operation is write-like: it has an effect but does not return any information from the MBean.

See Also:

• Constant Field Values

ACTION_INFO

public static final int ACTION_INFO

Indicates that the operation is both read-like and write-like: it has an effect, and it also returns information from the MBean.

See Also:

• Constant Field Values

UNKNOWN

public static final int UNKNOWN

Indicates that the impact of the operation is unknown or cannot be expressed using one of the other values.

See Also:

• Constant Field Values

Constructor Details

MBeanOperationInfo

public MBeanOperationInfo(String description,
 Method method)

Constructs an MBeanOperationInfo object. The Descriptor of the constructed object will include fields contributed by any annotations on the Method object that contain the DescriptorKey meta-annotation.

Parameters:

description - A human readable description of the operation.

method - The java.lang.reflect.Method object describing the MBean operation.

MBeanOperationInfo

public MBeanOperationInfo(String name,
 String description,
 MBeanParameterInfo[] signature,
 String type,
 int impact)

Constructs an MBeanOperationInfo object.

Parameters:

name - The name of the method.

description - A human readable description of the operation.

signature - MBeanParameterInfo objects describing the parameters(arguments) of the method. This may be null with the same effect as a zero-length array.

type - The type of the method's return value.

impact - The impact of the method, one of INFO, ACTION, ACTION_INFO, UNKNOWN.

MBeanOperationInfo

public MBeanOperationInfo(String name,
 String description,
 MBeanParameterInfo[] signature,
 String type,
 int impact,
 Descriptor descriptor)

Constructs an MBeanOperationInfo object.

Parameters:

name - The name of the method.

description - A human readable description of the operation.

signature - MBeanParameterInfo objects describing the parameters(arguments) of the method. This may be null with the same effect as a zero-length array.

type - The type of the method's return value.

impact - The impact of the method, one of INFO, ACTION, ACTION_INFO, UNKNOWN.

descriptor - The descriptor for the operation. This may be null which is equivalent to an empty descriptor.

Throws:

IllegalArgumentException - if impact is not one of ACTION, ACTION_INFO, INFO or UNKNOWN.

Since:

1.6

Method Details

clone

public Object clone()

Returns a shallow clone of this instance. The clone is obtained by simply calling super.clone(), thus calling the default native shallow cloning mechanism implemented by Object.clone(). No deeper cloning of any internal field is made.

Since this class is immutable, cloning is chiefly of interest to subclasses.

Overrides:

clone in class Object

Returns:

a clone of this instance.

See Also:

• Cloneable

getReturnType

public String getReturnType()

Returns the type of the method's return value.

Returns:

the return type.

getSignature

public MBeanParameterInfo[] getSignature()

Returns the list of parameters for this operation. Each parameter is described by an MBeanParameterInfo object.

The returned array is a shallow copy of the internal array, which means that it is a copy of the internal array of references to the MBeanParameterInfo objects but that each referenced MBeanParameterInfo object is not copied.

Returns:

An array of MBeanParameterInfo objects.

getImpact

public int getImpact()

Returns the impact of the method, one of INFO, ACTION, ACTION_INFO, UNKNOWN.

Returns:

the impact code.

equals

public boolean equals(Object o)

Compare this MBeanOperationInfo to another.

Overrides:

equals in class MBeanFeatureInfo

Parameters:

o - the object to compare to.

Returns:

true if and only if o is an MBeanOperationInfo such that its MBeanFeatureInfo.getName(), getReturnType(), MBeanFeatureInfo.getDescription(), getImpact(), MBeanFeatureInfo.getDescriptor() and getSignature() values are equal (not necessarily identical) to those of this MBeanConstructorInfo. Two signature arrays are equal if their elements are pairwise equal.

See Also:

• Object.hashCode()
• HashMap