/*
|
* CDDL HEADER START
|
*
|
* The contents of this file are subject to the terms of the
|
* Common Development and Distribution License, Version 1.0 only
|
* (the "License"). You may not use this file except in compliance
|
* with the License.
|
*
|
* You can obtain a copy of the license at legal-notices/CDDLv1_0.txt
|
* or http://forgerock.org/license/CDDLv1.0.html.
|
* See the License for the specific language governing permissions
|
* and limitations under the License.
|
*
|
* When distributing Covered Code, include this CDDL HEADER in each
|
* file and include the License file at legal-notices/CDDLv1_0.txt.
|
* If applicable, add the following below this CDDL HEADER, with the
|
* fields enclosed by brackets "[]" replaced with your own identifying
|
* information:
|
* Portions Copyright [yyyy] [name of copyright owner]
|
*
|
* CDDL HEADER END
|
*
|
*
|
* Copyright 2008-2010 Sun Microsystems, Inc.
|
* Portions Copyright 2011-2016 ForgeRock AS
|
*/
|
package org.opends.server.replication.plugin;
|
|
import static org.opends.server.replication.plugin.HistAttrModificationKey.*;
|
|
import java.util.Collections;
|
import java.util.Iterator;
|
import java.util.Set;
|
|
import org.forgerock.opendj.ldap.ByteString;
|
import org.forgerock.opendj.ldap.ModificationType;
|
import org.opends.server.replication.common.CSN;
|
import org.opends.server.types.Attribute;
|
import org.forgerock.opendj.ldap.schema.AttributeType;
|
import org.opends.server.types.Entry;
|
import org.opends.server.types.Modification;
|
|
/**
|
* This class is used to store historical information for single valued attributes.
|
* One object of this type is created for each attribute that was changed in the entry.
|
* It allows to record the last time a given value was added,
|
* and the last time the whole attribute was deleted.
|
*/
|
public class AttrHistoricalSingle extends AttrHistorical
|
{
|
/** Last time when the attribute was deleted. */
|
private CSN deleteTime;
|
/** Last time when a value was added. */
|
private CSN addTime;
|
/** Last added value. */
|
private ByteString value;
|
/**
|
* Last operation applied. This is only used for multiple mods on the same
|
* single valued attribute in the same modification.
|
*/
|
private HistAttrModificationKey lastMod;
|
|
@Override
|
public CSN getDeleteTime()
|
{
|
return this.deleteTime;
|
}
|
|
@Override
|
public Set<AttrValueHistorical> getValuesHistorical()
|
{
|
if (addTime != null)
|
{
|
return Collections.singleton(new AttrValueHistorical(value, addTime, null));
|
}
|
return Collections.emptySet();
|
}
|
|
@Override
|
public void processLocalOrNonConflictModification(CSN csn, Modification mod)
|
{
|
Attribute modAttr = mod.getAttribute();
|
ByteString newValue = getSingleValue(modAttr);
|
|
switch (mod.getModificationType().asEnum())
|
{
|
case DELETE:
|
delete(csn, newValue);
|
break;
|
|
case ADD:
|
add(csn, newValue);
|
break;
|
|
case REPLACE:
|
replaceOrDelete(csn, newValue);
|
break;
|
|
case INCREMENT:
|
/* FIXME : we should update CSN */
|
break;
|
}
|
}
|
|
private void replaceOrDelete(CSN csn, ByteString newValue)
|
{
|
if (newValue != null)
|
{
|
replace(csn, newValue);
|
}
|
else
|
{
|
delete(csn, null);
|
}
|
}
|
|
private void add(CSN csn, ByteString newValue)
|
{
|
addTime = csn;
|
value = newValue;
|
lastMod = ADD;
|
}
|
|
private void replace(CSN csn, ByteString newValue)
|
{
|
addTime = csn;
|
deleteTime = csn;
|
value = newValue;
|
lastMod = REPL;
|
}
|
|
private void delete(CSN csn, ByteString newValue)
|
{
|
addTime = null;
|
deleteTime = csn;
|
value = newValue;
|
lastMod = DEL;
|
}
|
|
private void deleteWithoutDeleteTime()
|
{
|
addTime = null;
|
value = null;
|
lastMod = DEL;
|
}
|
|
@Override
|
public boolean replayOperation(Iterator<Modification> modsIterator, CSN csn,
|
Entry modifiedEntry, Modification mod)
|
{
|
Attribute modAttr = mod.getAttribute();
|
ByteString newValue = getSingleValue(modAttr);
|
|
boolean conflict = false;
|
switch (mod.getModificationType().asEnum())
|
{
|
case DELETE:
|
if (csn.isNewerThan(addTime))
|
{
|
if (newValue == null || newValue.equals(value) || value == null)
|
{
|
if (csn.isNewerThan(deleteTime))
|
{
|
deleteTime = csn;
|
}
|
AttributeType type = modAttr.getAttributeType();
|
if (!modifiedEntry.hasAttribute(type))
|
{
|
conflict = true;
|
modsIterator.remove();
|
}
|
else if (newValue != null &&
|
!modifiedEntry.hasValue(type, modAttr.getOptions(), newValue))
|
{
|
conflict = true;
|
modsIterator.remove();
|
}
|
else
|
{
|
deleteWithoutDeleteTime();
|
}
|
}
|
else
|
{
|
conflict = true;
|
modsIterator.remove();
|
}
|
}
|
else if (csn.equals(addTime))
|
{
|
if (lastMod == ADD || lastMod == REPL)
|
{
|
if (csn.isNewerThan(deleteTime))
|
{
|
deleteTime = csn;
|
}
|
deleteWithoutDeleteTime();
|
}
|
else
|
{
|
conflict = true;
|
modsIterator.remove();
|
}
|
}
|
else
|
{
|
conflict = true;
|
modsIterator.remove();
|
}
|
break;
|
|
case ADD:
|
if (csn.isNewerThanOrEqualTo(deleteTime) && csn.isOlderThan(addTime))
|
{
|
conflict = true;
|
mod.setModificationType(ModificationType.REPLACE);
|
addTime = csn;
|
value = newValue;
|
lastMod = REPL;
|
}
|
else
|
{
|
if (csn.isNewerThanOrEqualTo(deleteTime)
|
&& (addTime == null || addTime.isOlderThan(deleteTime)))
|
{
|
add(csn, newValue);
|
}
|
else
|
{
|
// Case where CSN = addTime = deleteTime
|
if (csn.equals(deleteTime) && csn.equals(addTime)
|
&& lastMod == DEL)
|
{
|
add(csn, newValue);
|
}
|
else
|
{
|
conflict = true;
|
modsIterator.remove();
|
}
|
}
|
}
|
|
break;
|
|
case REPLACE:
|
if (csn.isOlderThan(deleteTime))
|
{
|
conflict = true;
|
modsIterator.remove();
|
}
|
else
|
{
|
replaceOrDelete(csn, newValue);
|
}
|
break;
|
|
case INCREMENT:
|
/* FIXME : we should update CSN */
|
break;
|
}
|
return conflict;
|
}
|
|
private ByteString getSingleValue(Attribute modAttr)
|
{
|
if (modAttr != null && !modAttr.isEmpty())
|
{
|
return modAttr.iterator().next();
|
}
|
return null;
|
}
|
|
@Override
|
public void assign(HistAttrModificationKey histKey, ByteString value, CSN csn)
|
{
|
switch (histKey)
|
{
|
case ADD:
|
this.addTime = csn;
|
this.value = value;
|
break;
|
|
case DEL:
|
this.deleteTime = csn;
|
if (value != null)
|
{
|
this.value = value;
|
}
|
break;
|
|
case REPL:
|
this.addTime = this.deleteTime = csn;
|
if (value != null)
|
{
|
this.value = value;
|
}
|
break;
|
|
case ATTRDEL:
|
this.deleteTime = csn;
|
break;
|
}
|
}
|
|
@Override
|
public String toString()
|
{
|
final StringBuilder sb = new StringBuilder();
|
if (deleteTime != null)
|
{
|
sb.append("deleteTime=").append(deleteTime);
|
}
|
if (addTime != null)
|
{
|
if (sb.length() > 0)
|
{
|
sb.append(", ");
|
}
|
sb.append("addTime=").append(addTime);
|
}
|
if (sb.length() > 0)
|
{
|
sb.append(", ");
|
}
|
sb.append("value=").append(value)
|
.append(", lastMod=").append(lastMod);
|
return getClass().getSimpleName() + "(" + sb + ")";
|
}
|
}
|
