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 the write-lock (but not the read-lock) of 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
Constructor | Description |
---|---|
LockInfo(String className,
int identityHashCode) | Constructs a |
Method Summary
Modifier and Type | Method | Description |
---|---|---|
static LockInfo | from(CompositeData cd) | Returns a |
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 |
String | toString() | Returns a string representation of a lock. |
Methods declared in 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
- theidentity 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 aLockInfo
- Returns:
- a
LockInfo
object represented bycd
ifcd
is notnull
;null
otherwise. - Throws:
-
IllegalArgumentException
- ifcd
does not represent aLockInfo
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.