| /** |
| * 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: |
| * Eike Stepper - initial API and implementation |
| */ |
| package org.eclipse.emf.cdo.spi.server; |
| |
| import org.eclipse.emf.cdo.common.id.CDOID; |
| import org.eclipse.emf.cdo.common.id.CDOID.ObjectType; |
| import org.eclipse.emf.cdo.common.id.CDOIDUtil; |
| import org.eclipse.emf.cdo.common.revision.CDORevision; |
| |
| import org.eclipse.net4j.util.ReflectUtil.ExcludeFromDump; |
| |
| import java.util.Collections; |
| import java.util.Set; |
| import java.util.concurrent.atomic.AtomicLong; |
| |
| /** |
| * @author Eike Stepper |
| * @since 2.0 |
| */ |
| public abstract class LongIDStore extends Store |
| { |
| /** |
| * @since 3.0 |
| */ |
| public static final Set<ObjectType> OBJECT_ID_TYPES = Collections.singleton(CDOID.ObjectType.LONG); |
| |
| /** |
| * @since 3.0 |
| */ |
| public static final long NULL = CDOIDUtil.getLong(CDOID.NULL); |
| |
| @ExcludeFromDump |
| private transient AtomicLong lastObjectID = new AtomicLong(); |
| |
| @ExcludeFromDump |
| private transient AtomicLong nextLocalObjectID = new AtomicLong(Long.MAX_VALUE); |
| |
| public LongIDStore(String type, Set<ChangeFormat> supportedChangeFormats, |
| Set<RevisionTemporality> supportedRevisionTemporalities, Set<RevisionParallelism> supportedRevisionParallelisms) |
| { |
| super(type, OBJECT_ID_TYPES, supportedChangeFormats, supportedRevisionTemporalities, supportedRevisionParallelisms); |
| } |
| |
| /** |
| * @since 4.0 |
| */ |
| public CDOID createObjectID(String val) |
| { |
| Long id = Long.valueOf(val); |
| return CDOIDUtil.createLong(id); |
| } |
| |
| public long getLastObjectID() |
| { |
| return lastObjectID.get(); |
| } |
| |
| public void setLastObjectID(long lastObjectID) |
| { |
| this.lastObjectID.set(lastObjectID); |
| } |
| |
| /** |
| * @since 3.0 |
| */ |
| public long getNextLocalObjectID() |
| { |
| return nextLocalObjectID.get(); |
| } |
| |
| /** |
| * @since 3.0 |
| */ |
| public void setNextLocalObjectID(long nextLocalObjectID) |
| { |
| this.nextLocalObjectID.set(nextLocalObjectID); |
| } |
| |
| /** |
| * @since 4.0 |
| */ |
| public CDOID getNextCDOID(LongIDStoreAccessor accessor, CDORevision revision) |
| { |
| if (revision.getBranch().isLocal()) |
| { |
| return CDOIDUtil.createLong(nextLocalObjectID.getAndDecrement()); |
| } |
| |
| return CDOIDUtil.createLong(lastObjectID.incrementAndGet()); |
| } |
| |
| /** |
| * @since 4.0 |
| */ |
| public boolean isLocal(CDOID id) |
| { |
| long value = CDOIDUtil.getLong(id); |
| return value > nextLocalObjectID.get(); |
| } |
| |
| /** |
| * @since 4.0 |
| */ |
| public void ensureLastObjectID(CDOID id) |
| { |
| long addedID = CDOIDUtil.getLong(id); |
| if (addedID > getLastObjectID()) |
| { |
| setLastObjectID(addedID); |
| } |
| } |
| } |