LockInfo

java.lang.management

Class LockInfo

java.lang.Object
- java.lang.management.LockInfo

Direct Known Subclasses:

MonitorInfo
```
public class LockInfo
extends Object
```
Information about a lock. A lock can be a built-in object monitor, an ownable synchronizer, or the Condition object associated with synchronizers.
An ownable synchronizer is a synchronizer that may be exclusively owned by a thread and uses AbstractOwnableSynchronizer (or its subclass) to implement its synchronization property. ReentrantLock and ReentrantReadWriteLock are two examples of ownable synchronizers provided by the platform.

MXBean Mapping
LockInfo is mapped to a CompositeData as specified in the from method.

Since:

1.6

See Also:

AbstractOwnableSynchronizer, Condition

Constructor Summary

Constructors

Constructor and Description
`LockInfo(String className, int identityHashCode)` Constructs a `LockInfo` object.

Method Summary

All Methods

Static Methods

Instance Methods

Concrete Methods
Modifier and Type	Method and Description
`static LockInfo`	`from(CompositeData cd)` Returns a `LockInfo` object represented by the given `CompositeData`.
`String`	`getClassName()` Returns the fully qualified name of the class of the lock object.
`int`	`getIdentityHashCode()` Returns the identity hash code of the lock object returned from the `System.identityHashCode(java.lang.Object)` method.
`String`	`toString()` Returns a string representation of a lock.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail
- LockInfo
```
public LockInfo(String className,
                int identityHashCode)
```
  Constructs a LockInfo object.
  
  Parameters:
  
  className - the fully qualified name of the class of the lock object.
  
  identityHashCode - the identity hash code of the lock object.

Method Detail

getClassName
```
public String getClassName()
```
Returns the fully qualified name of the class of the lock object.

Returns:

the fully qualified name of the class of the lock object.

getIdentityHashCode
```
public int getIdentityHashCode()
```
Returns the identity hash code of the lock object returned from the System.identityHashCode(java.lang.Object) method.

Returns:

the identity hash code of the lock object.

from

public static LockInfo from(CompositeData cd)

Returns a LockInfo object represented by the given CompositeData. The given CompositeData must contain the following attributes:

Attribute Name Type

className java.lang.String

identityHashCode java.lang.Integer

Parameters:: cd - CompositeData representing a LockInfo
Returns:: a LockInfo object represented by cd if cd is not null; null otherwise.
Throws:: IllegalArgumentException - if cd does not represent a LockInfo with the attributes described above.
Since:: 1.8

toString
```
public String toString()
```
Returns a string representation of a lock. The returned string representation consists of the name of the class of the lock object, the at-sign character `@', and the unsigned hexadecimal representation of the identity hash code of the object. This method returns a string equals to the value of:
```
 lock.getClass().getName() + '@' + Integer.toHexString(System.identityHashCode(lock))
 
```
where lock is the lock object.
Overrides:

toString in class Object

Returns:

the string representation of a lock.