1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
|
/*
* Copyright (c) 2004 - 2012 Eike Stepper (Berlin, Germany) and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Eike Stepper - initial API and implementation
*/
package org.eclipse.net4j.util.concurrent;
import java.util.Collection;
/**
* Support Multiple reads/no write and upgrade lock from read to write. Many context could request
* {@link LockType#WRITE write} lock at the same time. It will privileges first context that has already a
* {@link LockType#READ read} lock. If no one has any read lock, it's "first come first serve".
*
* @author Eike Stepper
* @since 3.0
*/
public interface IRWLockManager<OBJECT, CONTEXT>
{
public static final int WAIT = 0;
public static final int NO_WAIT = 1;
public void lock(LockType type, CONTEXT context, Collection<? extends OBJECT> objectsToLock, long timeout)
throws InterruptedException;
public void lock(LockType type, CONTEXT context, OBJECT objectToLock, long timeout) throws InterruptedException;
/**
* Attempts to release for a given locktype, context and objects.
*
* @throws IllegalMonitorStateException
* Unlocking objects without lock.
*/
public void unlock(LockType type, CONTEXT context, Collection<? extends OBJECT> objectsToUnlock);
/**
* Attempts to release all locks(read and write) for a given context.
*/
public void unlock(CONTEXT context);
public boolean hasLock(LockType type, CONTEXT context, OBJECT objectToLock);
public boolean hasLockByOthers(LockType type, CONTEXT context, OBJECT objectToLock);
/**
* @author Simon McDuff
*/
public static enum LockType
{
WRITE, READ,
/**
* @since 3.2
*/
OPTION
}
}
|
