| /* |
| * Copyright (c) 2009-2012 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 |
| } |
| } |