java.lang.Object
java.lang.management.LockInfo
java.lang.management.MonitorInfo
This class represents information about objects locked via
a synchronized method or block.
- Since:
- 1.6
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Constructor Summary
ConstructorsConstructorDescriptionMonitorInfo(String className, int identityHashCode, int stackDepth, StackTraceElement stackFrame) Creates a newMonitorInfoinstance. -
Method Summary
Modifier and TypeMethodDescriptionstatic MonitorInfofrom(CompositeData cd) Receives aCompositeDatarepresenting aMonitorInfoobject and attempts to return the rootMonitorInfoinstance.intReturns an integer which is the number of frames deep into the stack where the monitor locking took place.The completeStackTraceElementin which the monitor was locked.Methods declared in class java.lang.management.LockInfo
getClassName, getIdentityHashCode, toString
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Constructor Details
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MonitorInfo
public MonitorInfo(String className, int identityHashCode, int stackDepth, StackTraceElement stackFrame) Creates a newMonitorInfoinstance.- Parameters:
className- the name (including the package prefix) of the associated monitor lock object's classidentityHashCode- the value of the associated monitor lock object's identity hash code. This amounts to the result of callingSystem.identityHashCode(Object)with the monitor lock object as the sole argument.stackDepth- the number of frames deep in the stack where the locking of the monitor took placestackFrame- the complete stack frame at which the locking of the monitor occurred- Throws:
IllegalArgumentException- if either of the following two conditions apply:- the supplied
stackFrameis non-nullyet the value ofstackDepthis less than zero - the supplied
stackFrameisnullyet the value ofstackDepthis zero or greater
- the supplied
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Method Details
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getLockedStackDepth
public int getLockedStackDepth()Returns an integer which is the number of frames deep into the stack where the monitor locking took place.- Returns:
- the number of frames into the stack trace at which point the monitor object locking too place
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getLockedStackFrame
The completeStackTraceElementin which the monitor was locked.- Returns:
- the
StackTraceElementin which the associated monitor was locked
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from
Receives aCompositeDatarepresenting aMonitorInfoobject and attempts to return the rootMonitorInfoinstance.- Parameters:
cd- aCompositeDatathat represents aMonitorInfo.- Returns:
- if
cdis non-null, returns a new instance ofMonitorInfo. Ifcdisnull, returnsnull. - Throws:
IllegalArgumentException- if argumentcddoes not correspond to aMonitorInfowith the expected attributes of aLockInfo-className(java.lang.String) andidentityHashCode(java.lang.Integer) - plus the following:lockedStackFrame(javax.management.openmbean.CompositeData)lockedStackDepth(java.lang.Integer)
lockedStackFrameattribute must correspond to ajava.lang.StackTraceElementwhich has the following attributes:moduleName(java.lang.String)moduleVersion(java.lang.String)className(java.lang.String)methodName(java.lang.String)fileName(java.lang.String)lineNumber(java.lang.Integer)nativeMethod(java.lang.Boolean)
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