compact3
java.lang.management
Class MonitorInfo
- java.lang.Object
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- java.lang.management.LockInfo
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- java.lang.management.MonitorInfo
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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 aCompositeDatawith attributes as specified in thefrommethod.- Since:
- 1.6
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Constructor Summary
Constructors Constructor and Description MonitorInfo(String className, int identityHashCode, int stackDepth, StackTraceElement stackFrame)Construct a MonitorInfo object.
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Method Summary
All Methods Static Methods Instance Methods Concrete Methods Modifier and Type Method and Description static MonitorInfofrom(CompositeData cd)Returns a MonitorInfo object represented by the given CompositeData.intgetLockedStackDepth()Returns the depth in the stack trace where the object monitor was locked.StackTraceElementgetLockedStackFrame()Returns the stack frame that locked the object monitor.-
Methods inherited from class java.lang.management.LockInfo
getClassName, getIdentityHashCode, toString
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Constructor Detail
MonitorInfo
public MonitorInfo(String className, int identityHashCode, int stackDepth, StackTraceElement stackFrame)
Construct a MonitorInfo object.- Parameters:
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className- the fully qualified name of the class of the lock object. -
identityHashCode- theidentity hash codeof 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:
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IllegalArgumentException- if stackDepth ≥ 0 but stackFrame is null, or stackDepth < 0 but stackFrame is not null.
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Method Detail
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 theThreadInfo.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 theLockInfoclass:Attribute Name Type lockedStackFrame CompositeData as specified in the stackTrace attribute defined in the ThreadInfo.frommethod.lockedStackDepth java.lang.Integer - Parameters:
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cd- CompositeData representing a MonitorInfo - Returns:
- a MonitorInfo object represented by cd if cd is not null; null otherwise.
- Throws:
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IllegalArgumentException- if cd does not represent a MonitorInfo with the attributes described above.
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For further API reference and developer documentation, see Java SE Documentation. That documentation contains more detailed, developer-targeted descriptions, with conceptual overviews, definitions of terms, workarounds, and working code examples.
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