co.stateful.quota

Class QtLocks

java.lang.Object

co.stateful.quota.QtLocks

All Implemented Interfaces:

Locks

@Immutable
@Loggable(value=1)
public final class QtLocks
extends Object
implements Locks

Quota on Locks.

Since:

1.4

Version:

$Id$

Author:

Yegor Bugayenko (yegor@tpc2.com)

Field Summary

Fields inherited from interface co.stateful.spi.Locks

MAX

Constructor Summary

Constructors

Constructor and Description
QtLocks(Locks org, Quota qta) Ctor.

Method Summary

Methods

Modifier and Type	Method and Description
String	lock(String name, String label) Lock it.
Map<String,String>	names() Get list of them all, and their labels.
void	unlock(String name) Unlock it.
String	unlock(String name, String label) Unlock only if label matches.

Methods inherited from class java.lang.Object

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

Constructor Detail

QtLocks

public QtLocks(Locks org,
       Quota qta)

Ctor.

Parameters:

org - Original object

qta - Quota

Method Detail

names

public Map<String,String> names()
                         throws IOException

Description copied from interface: Locks

Get list of them all, and their labels.

Specified by:

names in interface Locks

Returns:

List of locks

Throws:

IOException - If fails

lock

public String lock(String name,
          String label)
            throws IOException

Description copied from interface: Locks

Lock it.

Specified by:

lock in interface Locks

Parameters:

name - Unique name of the lock

label - Label to attach

Returns:

Empty if success or a label of a current lock

Throws:

IOException - If fails

unlock

public void unlock(String name)
            throws IOException

Description copied from interface: Locks

Unlock it.

Specified by:

unlock in interface Locks

Parameters:

name - Unique name of the lock

Throws:

IOException - If fails

unlock

public String unlock(String name,
            String label)
              throws IOException

Description copied from interface: Locks

Unlock only if label matches.

Specified by:

unlock in interface Locks

Parameters:

name - Unique name of the lock

label - Label to match

Returns:

Empty if success or label of current lock

Throws:

IOException - If fails