/*
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* CDDL HEADER START
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*
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* The contents of this file are subject to the terms of the
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* Common Development and Distribution License, Version 1.0 only
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* (the "License"). You may not use this file except in compliance
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* with the License.
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*
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* You can obtain a copy of the license at legal-notices/CDDLv1_0.txt
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* or http://forgerock.org/license/CDDLv1.0.html.
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* See the License for the specific language governing permissions
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* and limitations under the License.
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*
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* When distributing Covered Code, include this CDDL HEADER in each
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* file and include the License file at legal-notices/CDDLv1_0.txt.
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* If applicable, add the following below this CDDL HEADER, with the
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* fields enclosed by brackets "[]" replaced with your own identifying
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* information:
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* Portions Copyright [yyyy] [name of copyright owner]
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*
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* CDDL HEADER END
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*
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*
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* Copyright 2006-2008 Sun Microsystems, Inc.
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* Portions Copyright 2014 ForgeRock AS
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*/
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package org.opends.server.plugins;
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import java.util.ArrayList;
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import java.util.Collections;
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import java.util.List;
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import java.util.Map;
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import java.util.Set;
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import java.util.UUID;
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import org.forgerock.i18n.LocalizableMessage;
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import org.forgerock.opendj.ldap.ByteString;
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import org.forgerock.opendj.ldap.schema.AttributeUsage;
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import org.opends.server.admin.server.ConfigurationChangeListener;
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import org.opends.server.admin.std.meta.PluginCfgDefn;
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import org.opends.server.admin.std.server.EntryUUIDPluginCfg;
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import org.opends.server.admin.std.server.PluginCfg;
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import org.opends.server.api.plugin.DirectoryServerPlugin;
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import org.opends.server.api.plugin.PluginResult;
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import org.opends.server.api.plugin.PluginType;
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import org.opends.server.config.ConfigException;
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import org.opends.server.types.*;
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import org.forgerock.opendj.ldap.ResultCode;
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import org.opends.server.types.operation.PreOperationAddOperation;
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import static org.opends.messages.PluginMessages.*;
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import static org.opends.server.util.StaticUtils.*;
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/**
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* This class implements a Directory Server plugin that will add the entryUUID
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* attribute to an entry whenever it is added or imported as per RFC 4530. For
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* entries added over LDAP, the entryUUID will be based on a semi-random UUID
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* (which is still guaranteed to be unique). For entries imported from LDIF,
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* the UUID will be constructed from the entry DN using a repeatable algorithm.
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* This will ensure that LDIF files imported in parallel across multiple systems
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* will have identical entryUUID values.
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*/
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public final class EntryUUIDPlugin
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extends DirectoryServerPlugin<EntryUUIDPluginCfg>
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implements ConfigurationChangeListener<EntryUUIDPluginCfg>
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{
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/**
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* The name of the entryUUID attribute type.
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*/
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private static final String ENTRYUUID = "entryuuid";
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// The attribute type for the "entryUUID" attribute.
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private final AttributeType entryUUIDType;
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// The current configuration for this plugin.
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private EntryUUIDPluginCfg currentConfig;
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/**
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* Creates a new instance of this Directory Server plugin. Every plugin must
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* implement a default constructor (it is the only one that will be used to
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* create plugins defined in the configuration), and every plugin constructor
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* must call <CODE>super()</CODE> as its first element.
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*/
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public EntryUUIDPlugin()
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{
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super();
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// Get the entryUUID attribute type. This needs to be done in the
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// constructor in order to make the associated variables "final".
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AttributeType at = DirectoryConfig.getAttributeType(ENTRYUUID, false);
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if (at == null)
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{
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String definition =
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"( 1.3.6.1.1.16.4 NAME 'entryUUID' DESC 'UUID of the entry' " +
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"EQUALITY uuidMatch ORDERING uuidOrderingMatch " +
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"SYNTAX 1.3.6.1.1.16.1 SINGLE-VALUE NO-USER-MODIFICATION " +
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"USAGE directoryOperation X-ORIGIN 'RFC 4530' )";
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at = new AttributeType(definition, ENTRYUUID,
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Collections.singleton(ENTRYUUID), ENTRYUUID, null,
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null, DirectoryConfig.getDefaultAttributeSyntax(),
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AttributeUsage.DIRECTORY_OPERATION, false, true,
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false, true);
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}
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entryUUIDType = at;
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}
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/**
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* {@inheritDoc}
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*/
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@Override()
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public final void initializePlugin(Set<PluginType> pluginTypes,
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EntryUUIDPluginCfg configuration)
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throws ConfigException
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{
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currentConfig = configuration;
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configuration.addEntryUUIDChangeListener(this);
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// Make sure that the plugin has been enabled for the appropriate types.
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for (PluginType t : pluginTypes)
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{
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switch (t)
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{
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case LDIF_IMPORT:
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case PRE_OPERATION_ADD:
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// These are acceptable.
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break;
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default:
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throw new ConfigException(ERR_PLUGIN_ENTRYUUID_INVALID_PLUGIN_TYPE.get(t));
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}
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}
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}
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/**
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* {@inheritDoc}
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*/
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@Override()
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public final void finalizePlugin()
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{
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currentConfig.removeEntryUUIDChangeListener(this);
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}
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/**
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* {@inheritDoc}
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*/
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@Override()
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public final PluginResult.ImportLDIF
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doLDIFImport(LDIFImportConfig importConfig, Entry entry)
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{
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// See if the entry being imported already contains an entryUUID attribute.
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// If so, then leave it alone.
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List<Attribute> uuidList = entry.getAttribute(entryUUIDType);
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if (uuidList != null)
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{
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return PluginResult.ImportLDIF.continueEntryProcessing();
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}
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// Construct a new UUID. In order to make sure that UUIDs are consistent
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// when the same LDIF is generated on multiple servers, we'll base the UUID
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// on the byte representation of the normalized DN.
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byte[] dnBytes = getBytes(entry.getName().toNormalizedString());
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UUID uuid = UUID.nameUUIDFromBytes(dnBytes);
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Attribute uuidAttr = Attributes.create(entryUUIDType,
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AttributeValues.create(entryUUIDType,
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ByteString.valueOf(uuid.toString())));
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uuidList = new ArrayList<Attribute>(1);
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uuidList.add(uuidAttr);
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entry.putAttribute(entryUUIDType, uuidList);
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// We shouldn't ever need to return a non-success result.
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return PluginResult.ImportLDIF.continueEntryProcessing();
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}
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/**
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* {@inheritDoc}
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*/
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@Override()
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public final PluginResult.PreOperation
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doPreOperation(PreOperationAddOperation addOperation)
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{
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// See if the entry being added already contains an entryUUID attribute.
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// It shouldn't, since it's NO-USER-MODIFICATION, but if it does then leave
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// it alone.
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Map<AttributeType,List<Attribute>> operationalAttributes =
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addOperation.getOperationalAttributes();
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List<Attribute> uuidList = operationalAttributes.get(entryUUIDType);
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if (uuidList != null)
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{
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return PluginResult.PreOperation.continueOperationProcessing();
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}
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// Construct a new random UUID.
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UUID uuid = UUID.randomUUID();
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Attribute uuidAttr = Attributes.create(entryUUIDType,
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AttributeValues.create(entryUUIDType,uuid.toString()));
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uuidList = new ArrayList<Attribute>(1);
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uuidList.add(uuidAttr);
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// Add the attribute to the entry and return.
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addOperation.setAttribute(entryUUIDType, uuidList);
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return PluginResult.PreOperation.continueOperationProcessing();
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}
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/**
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* {@inheritDoc}
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*/
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@Override()
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public boolean isConfigurationAcceptable(PluginCfg configuration,
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List<LocalizableMessage> unacceptableReasons)
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{
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EntryUUIDPluginCfg cfg = (EntryUUIDPluginCfg) configuration;
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return isConfigurationChangeAcceptable(cfg, unacceptableReasons);
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}
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/**
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* {@inheritDoc}
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*/
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@Override
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public boolean isConfigurationChangeAcceptable(
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EntryUUIDPluginCfg configuration,
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List<LocalizableMessage> unacceptableReasons)
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{
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boolean configAcceptable = true;
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// Ensure that the set of plugin types contains only LDIF import and
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// pre-operation add.
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for (PluginCfgDefn.PluginType pluginType : configuration.getPluginType())
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{
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switch (pluginType)
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{
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case LDIFIMPORT:
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case PREOPERATIONADD:
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// These are acceptable.
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break;
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default:
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unacceptableReasons.add(ERR_PLUGIN_ENTRYUUID_INVALID_PLUGIN_TYPE.get(pluginType));
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configAcceptable = false;
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}
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}
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return configAcceptable;
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}
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/**
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* {@inheritDoc}
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*/
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@Override
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public ConfigChangeResult applyConfigurationChange(
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EntryUUIDPluginCfg configuration)
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{
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currentConfig = configuration;
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return new ConfigChangeResult(ResultCode.SUCCESS, false);
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}
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}
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