AbstractOwnableSynchronizer (Java SE 12 & JDK 12 )

java.lang.Object
- java.util.concurrent.locks.AbstractOwnableSynchronizer

All Implemented Interfaces:

Serializable

Direct Known Subclasses:

AbstractQueuedLongSynchronizer, AbstractQueuedSynchronizer
```
public abstract class AbstractOwnableSynchronizer
extends Object
implements Serializable
```
A synchronizer that may be exclusively owned by a thread. This class provides a basis for creating locks and related synchronizers that may entail a notion of ownership. The AbstractOwnableSynchronizer class itself does not manage or use this information. However, subclasses and tools may use appropriately maintained values to help control and monitor access and provide diagnostics.

Since:

1.6

See Also:

Serialized Form

Constructor Summary

Constructors
Modifier Constructor Description

protected AbstractOwnableSynchronizer()
Empty constructor for use by subclasses.

Method Summary

Modifier and Type	Method	Description
`protected Thread`	`getExclusiveOwnerThread()`	Returns the thread last set by `setExclusiveOwnerThread`, or `null` if never set.
`protected void`	`setExclusiveOwnerThread(Thread thread)`	Sets the thread that currently owns exclusive access.

Methods declared in class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - AbstractOwnableSynchronizer
```
protected AbstractOwnableSynchronizer()
```
    Empty constructor for use by subclasses.
- Method Detail
  - setExclusiveOwnerThread
```
protected final void setExclusiveOwnerThread(Thread thread)
```
    Sets the thread that currently owns exclusive access. A null argument indicates that no thread owns access. This method does not otherwise impose any synchronization or volatile field accesses.
    
    Parameters:
    
    thread - the owner thread
  - getExclusiveOwnerThread
```
protected final Thread getExclusiveOwnerThread()
```
    Returns the thread last set by setExclusiveOwnerThread, or null if never set. This method does not otherwise impose any synchronization or volatile field accesses.
    
    Returns:
    
    the owner thread