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/*
* Copyright (c) 2009-2012, 2016 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;
/**
* If the meaning of this type isn't clear, there really should be more of a description here...
*
* @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());
}
@Deprecated
public boolean isLocal(CDOID id)
{
throw new UnsupportedOperationException();
}
/**
* @since 4.0
*/
public void ensureLastObjectID(CDOID id)
{
long addedID = CDOIDUtil.getLong(id);
if (addedID > getLastObjectID())
{
setLastObjectID(addedID);
}
}
}
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