/*
* 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
* trunk/opends/resource/legal-notices/OpenDS.LICENSE
* or https://OpenDS.dev.java.net/OpenDS.LICENSE.
* 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
* trunk/opends/resource/legal-notices/OpenDS.LICENSE. 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 2006-2008 Sun Microsystems, Inc.
*/
package org.opends.server.plugins;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.UUID;
import org.opends.messages.Message;
import org.opends.server.admin.server.ConfigurationChangeListener;
import org.opends.server.admin.std.meta.PluginCfgDefn;
import org.opends.server.admin.std.server.EntryUUIDPluginCfg;
import org.opends.server.admin.std.server.PluginCfg;
import org.opends.server.api.plugin.*;
import org.opends.server.config.ConfigException;
import org.opends.server.types.*;
import org.opends.server.types.operation.PreOperationAddOperation;
import static org.opends.messages.PluginMessages.*;
import static org.opends.server.util.StaticUtils.*;
/**
* This class implements a Directory Server plugin that will add the entryUUID
* attribute to an entry whenever it is added or imported as per RFC 4530. For
* entries added over LDAP, the entryUUID will be based on a semi-random UUID
* (which is still guaranteed to be unique). For entries imported from LDIF,
* the UUID will be constructed from the entry DN using a repeatable algorithm.
* This will ensure that LDIF files imported in parallel across multiple systems
* will have identical entryUUID values.
*/
public final class EntryUUIDPlugin
extends DirectoryServerPlugin<EntryUUIDPluginCfg>
implements ConfigurationChangeListener<EntryUUIDPluginCfg>
{
/**
* The name of the entryUUID attribute type.
*/
private static final String ENTRYUUID = "entryuuid";
// The attribute type for the "entryUUID" attribute.
private final AttributeType entryUUIDType;
// The current configuration for this plugin.
private EntryUUIDPluginCfg currentConfig;
/**
* Creates a new instance of this Directory Server plugin. Every plugin must
* implement a default constructor (it is the only one that will be used to
* create plugins defined in the configuration), and every plugin constructor
* must call <CODE>super()</CODE> as its first element.
*/
public EntryUUIDPlugin()
{
super();
// Get the entryUUID attribute type. This needs to be done in the
// constructor in order to make the associated variables "final".
AttributeType at = DirectoryConfig.getAttributeType(ENTRYUUID, false);
if (at == null)
{
String definition =
"( 1.3.6.1.1.16.4 NAME 'entryUUID' DESC 'UUID of the entry' " +
"EQUALITY uuidMatch ORDERING uuidOrderingMatch " +
"SYNTAX 1.3.6.1.1.16.1 SINGLE-VALUE NO-USER-MODIFICATION " +
"USAGE directoryOperation X-ORIGIN 'RFC 4530' )";
at = new AttributeType(definition, ENTRYUUID,
Collections.singleton(ENTRYUUID), ENTRYUUID, null,
null, DirectoryConfig.getDefaultAttributeSyntax(),
AttributeUsage.DIRECTORY_OPERATION, false, true,
false, true);
}
entryUUIDType = at;
}
/**
* {@inheritDoc}
*/
@Override()
public final void initializePlugin(Set<PluginType> pluginTypes,
EntryUUIDPluginCfg configuration)
throws ConfigException
{
currentConfig = configuration;
configuration.addEntryUUIDChangeListener(this);
// Make sure that the plugin has been enabled for the appropriate types.
for (PluginType t : pluginTypes)
{
switch (t)
{
case LDIF_IMPORT:
case PRE_OPERATION_ADD:
// These are acceptable.
break;
default:
Message message =
ERR_PLUGIN_ENTRYUUID_INVALID_PLUGIN_TYPE.get(t.toString());
throw new ConfigException(message);
}
}
}
/**
* {@inheritDoc}
*/
@Override()
public final void finalizePlugin()
{
currentConfig.removeEntryUUIDChangeListener(this);
}
/**
* {@inheritDoc}
*/
@Override()
public final PluginResult.ImportLDIF
doLDIFImport(LDIFImportConfig importConfig, Entry entry)
{
// See if the entry being imported already contains an entryUUID attribute.
// If so, then leave it alone.
List<Attribute> uuidList = entry.getAttribute(entryUUIDType);
if (uuidList != null)
{
return PluginResult.ImportLDIF.continueEntryProcessing();
}
// Construct a new UUID. In order to make sure that UUIDs are consistent
// when the same LDIF is generated on multiple servers, we'll base the UUID
// on the byte representation of the normalized DN.
byte[] dnBytes = getBytes(entry.getDN().toNormalizedString());
UUID uuid = UUID.nameUUIDFromBytes(dnBytes);
Attribute uuidAttr = Attributes.create(entryUUIDType,
AttributeValues.create(entryUUIDType,
ByteString.valueOf(uuid.toString())));
uuidList = new ArrayList<Attribute>(1);
uuidList.add(uuidAttr);
entry.putAttribute(entryUUIDType, uuidList);
// We shouldn't ever need to return a non-success result.
return PluginResult.ImportLDIF.continueEntryProcessing();
}
/**
* {@inheritDoc}
*/
@Override()
public final PluginResult.PreOperation
doPreOperation(PreOperationAddOperation addOperation)
{
// See if the entry being added already contains an entryUUID attribute.
// It shouldn't, since it's NO-USER-MODIFICATION, but if it does then leave
// it alone.
Map<AttributeType,List<Attribute>> operationalAttributes =
addOperation.getOperationalAttributes();
List<Attribute> uuidList = operationalAttributes.get(entryUUIDType);
if (uuidList != null)
{
return PluginResult.PreOperation.continueOperationProcessing();
}
// Construct a new random UUID.
UUID uuid = UUID.randomUUID();
Attribute uuidAttr = Attributes.create(entryUUIDType,
AttributeValues.create(entryUUIDType,uuid.toString()));
uuidList = new ArrayList<Attribute>(1);
uuidList.add(uuidAttr);
// Add the attribute to the entry and return.
addOperation.setAttribute(entryUUIDType, uuidList);
return PluginResult.PreOperation.continueOperationProcessing();
}
/**
* {@inheritDoc}
*/
@Override()
public boolean isConfigurationAcceptable(PluginCfg configuration,
List<Message> unacceptableReasons)
{
EntryUUIDPluginCfg cfg = (EntryUUIDPluginCfg) configuration;
return isConfigurationChangeAcceptable(cfg, unacceptableReasons);
}
/**
* {@inheritDoc}
*/
public boolean isConfigurationChangeAcceptable(
EntryUUIDPluginCfg configuration,
List<Message> unacceptableReasons)
{
boolean configAcceptable = true;
// Ensure that the set of plugin types contains only LDIF import and
// pre-operation add.
for (PluginCfgDefn.PluginType pluginType : configuration.getPluginType())
{
switch (pluginType)
{
case LDIFIMPORT:
case PREOPERATIONADD:
// These are acceptable.
break;
default:
Message message = ERR_PLUGIN_ENTRYUUID_INVALID_PLUGIN_TYPE.get(
pluginType.toString());
unacceptableReasons.add(message);
configAcceptable = false;
}
}
return configAcceptable;
}
/**
* {@inheritDoc}
*/
public ConfigChangeResult applyConfigurationChange(
EntryUUIDPluginCfg configuration)
{
currentConfig = configuration;
return new ConfigChangeResult(ResultCode.SUCCESS, false);
}
}