- java.lang.Object
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- java.lang.management.LockInfo
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- 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 theConditionobject 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.ReentrantLockand the write-lock (but not the read-lock) ofReentrantReadWriteLockare two examples of ownable synchronizers provided by the platform.MXBean Mapping
LockInfois mapped to aCompositeDataas specified in thefrommethod.- Since:
- 1.6
- See Also:
AbstractOwnableSynchronizer,Condition
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Method Summary
All Methods Static Methods Instance Methods Concrete Methods Modifier and Type Method Description static LockInfofrom(CompositeData cd)Returns aLockInfoobject represented by the givenCompositeData.StringgetClassName()Returns the fully qualified name of the class of the lock object.intgetIdentityHashCode()Returns the identity hash code of the lock object returned from theSystem.identityHashCode(java.lang.Object)method.StringtoString()Returns a string representation of a lock.
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Constructor Detail
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LockInfo
public LockInfo(String className, int identityHashCode)
Constructs aLockInfoobject.- Parameters:
className- the fully qualified name of the class of the lock object.identityHashCode- theidentity hash codeof the lock object.
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Method Detail
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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.
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getIdentityHashCode
public int getIdentityHashCode()
Returns the identity hash code of the lock object returned from theSystem.identityHashCode(java.lang.Object)method.- Returns:
- the identity hash code of the lock object.
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from
public static LockInfo from(CompositeData cd)
Returns aLockInfoobject represented by the givenCompositeData. The givenCompositeDatamust contain the following attributes:Attribute Name Type className java.lang.StringidentityHashCode java.lang.Integer- Parameters:
cd-CompositeDatarepresenting aLockInfo- Returns:
- a
LockInfoobject represented bycdifcdis notnull;nullotherwise. - Throws:
IllegalArgumentException- ifcddoes not represent aLockInfowith the attributes described above.- Since:
- 1.8
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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:
wherelock.getClass().getName() + '@' + Integer.toHexString(System.identityHashCode(lock))
lockis the lock object.
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