| /** |
| * Copyright (c) 2004 - 2011 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: |
| * Simon McDuff - initial API and implementation |
| * Eike Stepper - maintenance |
| */ |
| package org.eclipse.emf.internal.cdo.object; |
| |
| import org.eclipse.emf.cdo.CDOLock; |
| import org.eclipse.emf.cdo.util.LockTimeoutException; |
| |
| import org.eclipse.net4j.util.WrappedException; |
| import org.eclipse.net4j.util.concurrent.IRWLockManager.LockType; |
| |
| import org.eclipse.emf.spi.cdo.InternalCDOObject; |
| |
| import java.text.MessageFormat; |
| import java.util.Collections; |
| import java.util.concurrent.TimeUnit; |
| import java.util.concurrent.TimeoutException; |
| import java.util.concurrent.locks.Condition; |
| |
| /** |
| * @author Simon McDuff |
| * @since 4.0 |
| */ |
| public class CDOLockImpl implements CDOLock |
| { |
| public static final CDOLock NOOP = new NOOPLockImpl(); |
| |
| private InternalCDOObject object; |
| |
| private LockType type; |
| |
| public CDOLockImpl(InternalCDOObject object, LockType type) |
| { |
| this.object = object; |
| this.type = type; |
| } |
| |
| public LockType getType() |
| { |
| return type; |
| } |
| |
| public boolean isLocked() |
| { |
| return object.cdoView().isObjectLocked(object, type, false); |
| } |
| |
| /** |
| * @see org.eclipse.emf.cdo.CDOLock#isLockedByOthers() |
| */ |
| public boolean isLockedByOthers() |
| { |
| return object.cdoView().isObjectLocked(object, type, true); |
| } |
| |
| public void lock() |
| { |
| try |
| { |
| object.cdoView().lockObjects(Collections.singletonList(object), type, CDOLock.WAIT); |
| } |
| catch (InterruptedException ex) |
| { |
| throw WrappedException.wrap(ex); |
| } |
| } |
| |
| public void lock(long time, TimeUnit unit) throws TimeoutException |
| { |
| try |
| { |
| if (!tryLock(time, unit)) |
| { |
| throw new TimeoutException(); |
| } |
| } |
| catch (InterruptedException ex) |
| { |
| throw WrappedException.wrap(ex); |
| } |
| } |
| |
| public void lock(long millis) throws TimeoutException |
| { |
| lock(millis, TimeUnit.MILLISECONDS); |
| } |
| |
| public boolean tryLock(long millis) throws InterruptedException |
| { |
| return tryLock(millis, TimeUnit.MILLISECONDS); |
| } |
| |
| public void lockInterruptibly() throws InterruptedException |
| { |
| lock(); |
| } |
| |
| public Condition newCondition() |
| { |
| throw new UnsupportedOperationException(); |
| } |
| |
| public boolean tryLock() |
| { |
| try |
| { |
| object.cdoView().lockObjects(Collections.singletonList(object), type, CDOLock.NO_WAIT); |
| return true; |
| } |
| catch (LockTimeoutException ex) |
| { |
| return false; |
| } |
| catch (InterruptedException ex) |
| { |
| throw WrappedException.wrap(ex); |
| } |
| } |
| |
| public boolean tryLock(long time, TimeUnit unit) throws InterruptedException |
| { |
| try |
| { |
| object.cdoView().lockObjects(Collections.singletonList(object), type, unit.toMillis(time)); |
| return true; |
| } |
| catch (LockTimeoutException ex) |
| { |
| return false; |
| } |
| } |
| |
| public void unlock() |
| { |
| object.cdoView().unlockObjects(Collections.singletonList(object), type); |
| } |
| |
| @Override |
| public String toString() |
| { |
| return MessageFormat.format("CDOLock[object={0}, type={1}]", object, type); |
| } |
| |
| /** |
| * @author Simon McDuff |
| */ |
| public static final class NOOPLockImpl implements CDOLock |
| { |
| private NOOPLockImpl() |
| { |
| } |
| |
| public boolean isLocked() |
| { |
| return false; |
| } |
| |
| /** |
| * @see org.eclipse.emf.cdo.CDOLock#isLockedByOthers() |
| */ |
| public boolean isLockedByOthers() |
| { |
| return false; |
| } |
| |
| public void lock() |
| { |
| throw new UnsupportedOperationException(); |
| } |
| |
| public void lockInterruptibly() throws InterruptedException |
| { |
| throw new UnsupportedOperationException(); |
| } |
| |
| public Condition newCondition() |
| { |
| return null; |
| } |
| |
| public void lock(long time, TimeUnit unit) throws TimeoutException |
| { |
| throw new UnsupportedOperationException(); |
| } |
| |
| public void lock(long millis) throws TimeoutException |
| { |
| throw new UnsupportedOperationException(); |
| } |
| |
| public boolean tryLock(long millis) throws InterruptedException |
| { |
| return false; |
| } |
| |
| public boolean tryLock() |
| { |
| return false; |
| } |
| |
| public boolean tryLock(long time, TimeUnit unit) throws InterruptedException |
| { |
| return false; |
| } |
| |
| public void unlock() |
| { |
| throw new UnsupportedOperationException(); |
| } |
| |
| public LockType getType() |
| { |
| return null; |
| } |
| } |
| } |