Package org.mycore.util.concurrent

Class MCRReadWriteGuard

java.lang.Object

org.mycore.util.concurrent.MCRReadWriteGuard

public class MCRReadWriteGuard
extends Object

A MCRReadWriteGuard acts like a ReadWriteLock but automatically wraps read and write operations accordingly.

Author:

Thomas Scheffler (yagee)

Constructor Summary

Constructors

Constructor	Description
MCRReadWriteGuard()
MCRReadWriteGuard(ReadWriteLock readWriteLock)

Method Summary

Modifier and Type	Method	Description
<T> T	lazyLoad(Supplier<Boolean> check, Runnable operation, Supplier<T> reader)
<T> T	read(Supplier<T> reader)	Executes the read operation while the read lock is locked.
void	write(Runnable operation)	Executes the write operation while the write lock is locked.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

MCRReadWriteGuard

public MCRReadWriteGuard()

MCRReadWriteGuard

public MCRReadWriteGuard(ReadWriteLock readWriteLock)

Method Details

read

public <T> T read(Supplier<T> reader)

Executes the read operation while the read lock is locked. This is a sharable lock. Many reader can be executed simultaneously when no write operation is running.

Parameters:

reader - a read operation that should be guarded.

Returns:

result of Supplier.get()

write

public void write(Runnable operation)

Executes the write operation while the write lock is locked. This is an exclusive lock. So no other read or write operation can be executed while operation is running.

Parameters:

operation -

lazyLoad

public <T> T lazyLoad(Supplier<Boolean> check,
 Runnable operation,
 Supplier<T> reader)