Class LockInfo

java.lang.Object
java.lang.management.LockInfo
Direct Known Subclasses:
MonitorInfo
public class LockInfo extends Object
This class represents information about locked objects.
Since:
1.6

  • Constructor Summary

    Constructors
    Constructor
    Description
    LockInfo(String className, int identityHashCode)
    Creates a new LockInfo instance.

  • Method Summary

    Modifier and Type
    Method
    Description
    static LockInfo
    from(CompositeData compositeData)
    Returns a LockInfo object represented by the given CompositeData.
    String
    getClassName()
    Returns the name of the lock object's class in fully qualified form (i.e. including the package prefix).
    int
    getIdentityHashCode()
    Returns the value of the associated lock object's identity hash code
    String
    toString()
    Provides callers with a string value that represents the associated lock.

    Methods declared in class Object

    clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
    Modifier and Type
    Method
    Description
    protected Object
    clone()
    Answers a new instance of the same class as the receiver, whose slots have been filled in with the values in the slots of the receiver.
    boolean
    equals(Object o)
    Compares the argument to the receiver, and answers true if they represent the same object using a class specific comparison.
    protected void
    finalize()
    Deprecated, for removal: This API element is subject to removal in a future version.
    May cause performance issues, deadlocks and hangs.
    final Class<? extends Object>
    getClass()
    Answers the unique instance of java.lang.Class which represents the class of the receiver.
    int
    hashCode()
    Answers an integer hash code for the receiver.
    final void
    notify()
    Causes one thread which is waiting on the receiver to be made ready to run.
    final void
    notifyAll()
    Causes all threads which are waiting on the receiver to be made ready to run.
    final void
    wait()
    Causes the thread which sent this message to be made not ready to run pending some change in the receiver (as indicated by notify or notifyAll).
    final void
    wait(long time)
    Causes the thread which sent this message to be made not ready to run either pending some change in the receiver (as indicated by notify or notifyAll) or the expiration of the timeout.
    final void
    wait(long time, int frac)
    Causes the thread which sent this message to be made not ready to run either pending some change in the receiver (as indicated by notify or notifyAll) or the expiration of the timeout.

  • Constructor Details

    • LockInfo

      public LockInfo(String className, int identityHashCode)
      Creates a new LockInfo instance.
      Parameters:
      className - the name (including the package prefix) of the associated lock object's class
      identityHashCode - the value of the associated lock object's identity hash code. This amounts to the result of calling System.identityHashCode(Object) with the lock object as the sole argument.
      Throws:
      NullPointerException - if className is null

  • Method Details

    • getClassName

      public String getClassName()
      Returns the name of the lock object's class in fully qualified form (i.e. including the package prefix).
      Returns:
      the associated lock object's class name

    • getIdentityHashCode

      public int getIdentityHashCode()
      Returns the value of the associated lock object's identity hash code
      Returns:
      the identity hash code of the lock object

    • from

      public static LockInfo from(CompositeData compositeData)
      Returns a LockInfo object represented by the given CompositeData. The given CompositeData must contain the following attributes:

      The attributes and the types the given CompositeData contains
      Attribute Name Type
      className java.lang.String
      identityHashCode java.lang.Integer
      Parameters:
      compositeData - CompositeData representing a LockInfo
      Returns:
      a LockInfo object represented by compositeData if compositeData is not null; null otherwise.
      Throws:
      IllegalArgumentException - if compositeData does not represent a LockInfo with the attributes described above.
      Since:
      1.8

    • toString

      public String toString()
      Provides callers with a string value that represents the associated lock. The string will hold both the name of the lock object's class and it's identity hash code expressed as an unsigned hexadecimal. i.e.

      getClassName()  + @ + Integer.toHexString(getIdentityHashCode())

      Overrides:
      toString in class Object
      Returns:
      a string containing the key details of the lock