Top Description Fields Constructors Methods

org.h2.util

public Class AbbaDetector

Class Inheritance

extends Object

java.lang.Object
org.h2.util.AbbaDetector

Imports

java.util.ArrayDeque, .Deque, .HashSet, .Map, .Set, .WeakHashMap

Utility to detect AB-BA deadlocks.

Field Summary

Modifier and Type	Field and Description
private static final Set<String>	KNOWN_DEADLOCKS
private static final Map<Object, Map<Object, Exception>>	LOCK_ORDERING Map of (object A) -> ( map of (object locked before object A) -> (stack trace where locked) )
private static final ThreadLocal<Deque<Object>>	STACK
private static final boolean	TRACE

Constructor Summary

Access	Constructor and Description
public	AbbaDetector()

Method Summary

Modifier and Type	Method and Description
public static Object	Returns: the object that was passed begin(Object the object, or null for the current class o) This method is called just before or just after an object is synchronized.
private static String	getObjectName(Object o)
private static Object	getTest(Object o)
private static synchronized void	markHigher(Object o, Deque<Object> older)

Inherited from java.lang.Object:: clone equals finalize getClass hashCode notify notifyAll toString wait wait wait

Field Detail

KNOWN_DEADLOCKS	back to summary
private static final Set<String> KNOWN_DEADLOCKS

LOCK_ORDERING	back to summary
private static final Map<Object, Map<Object, Exception>> LOCK_ORDERING Map of (object A) -> ( map of (object locked before object A) -> (stack trace where locked) )

STACK	back to summary
private static final ThreadLocal<Deque<Object>> STACK

TRACE	back to summary
private static final boolean TRACE

Constructor Detail

AbbaDetector	back to summary
public AbbaDetector()

Method Detail

begin

back to summary

public static Object begin(Object o)

This method is called just before or just after an object is synchronized.

Parameters

o:Object: the object, or null for the current class

Returns:Object

the object that was passed

getObjectName	back to summary
private static String getObjectName(Object o)

getTest	back to summary
private static Object getTest(Object o)

markHigher	back to summary
private static synchronized void markHigher(Object o, Deque<Object> older)