Class MonitorInfo

java.lang.Object
java.lang.management.LockInfo
java.lang.management.MonitorInfo

public class MonitorInfo
extends LockInfo
Information about an object monitor lock. An object monitor is locked when entering a synchronization block or method on that object.

MXBean Mapping

MonitorInfo is mapped to a CompositeData with attributes as specified in the from method.
Since:
1.6
  • Constructor Details

    • MonitorInfo

      public MonitorInfo​(String className, int identityHashCode, int stackDepth, StackTraceElement stackFrame)
      Construct a MonitorInfo object.
      Parameters:
      className - the fully qualified name of the class of the lock object.
      identityHashCode - the identity hash code of the lock object.
      stackDepth - the depth in the stack trace where the object monitor was locked.
      stackFrame - the stack frame that locked the object monitor.
      Throws:
      IllegalArgumentException - if stackDepth ≥ 0 but stackFrame is null, or stackDepth < 0 but stackFrame is not null.
  • Method Details

    • getLockedStackDepth

      public int getLockedStackDepth()
      Returns the depth in the stack trace where the object monitor was locked. The depth is the index to the StackTraceElement array returned in the ThreadInfo.getStackTrace() method.
      Returns:
      the depth in the stack trace where the object monitor was locked, or a negative number if not available.
    • getLockedStackFrame

      public StackTraceElement getLockedStackFrame()
      Returns the stack frame that locked the object monitor.
      Returns:
      StackTraceElement that locked the object monitor, or null if not available.
    • from

      public static MonitorInfo from​(CompositeData cd)
      Returns a MonitorInfo object represented by the given CompositeData. The given CompositeData must contain the following attributes as well as the attributes specified in the mapped type for the LockInfo class:
      The attributes and their types the given CompositeData contains
      Attribute Name Type
      lockedStackFrame CompositeData for StackTraceElement as specified in ThreadInfo.from(CompositeData) method.
      lockedStackDepth java.lang.Integer
      Parameters:
      cd - CompositeData representing a MonitorInfo
      Returns:
      a MonitorInfo object represented by cd if cd is not null; null otherwise.
      Throws:
      IllegalArgumentException - if cd does not represent a MonitorInfo with the attributes described above.