/*
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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 2009 Sun Microsystems, Inc.
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* Portions Copyright 2011-2014 ForgeRock AS
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*/
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package org.opends.server.replication.common;
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import java.util.Collections;
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import java.util.List;
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import java.util.Set;
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import org.forgerock.i18n.LocalizableMessage;
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import org.opends.server.admin.server.ConfigurationChangeListener;
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import org.opends.server.admin.std.server.UserDefinedVirtualAttributeCfg;
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import org.opends.server.api.VirtualAttributeProvider;
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import org.opends.server.core.DirectoryServer;
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import org.opends.server.core.SearchOperation;
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import org.forgerock.i18n.slf4j.LocalizedLogger;
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import org.opends.server.replication.plugin.MultimasterReplication;
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import org.opends.server.replication.server.ReplicationServer;
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import org.opends.server.types.*;
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import org.forgerock.opendj.ldap.ByteString;
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import org.opends.server.util.ServerConstants;
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import org.opends.server.workflowelement.externalchangelog.ECLWorkflowElement;
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import static org.opends.messages.ExtensionMessages.*;
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/**
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* This class implements a virtual attribute provider in the root-dse entry
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* that contains the last (newest) cookie (cross domain state)
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* available in the server.
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*/
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public class LastCookieVirtualProvider
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extends VirtualAttributeProvider<UserDefinedVirtualAttributeCfg>
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implements ConfigurationChangeListener<UserDefinedVirtualAttributeCfg>
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{
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private static final LocalizedLogger logger = LocalizedLogger.getLoggerForThisClass();
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/**
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* Creates a new instance of this member virtual attribute provider.
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*/
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public LastCookieVirtualProvider()
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{
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super();
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// All initialization should be performed in the
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// initializeVirtualAttributeProvider method.
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}
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/** {@inheritDoc} */
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@Override()
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public boolean hasValue(Entry entry, VirtualAttributeRule rule)
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{
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// There's only a value for the rootDSE, i.e. the Null DN.
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return entry.getName().isRootDN();
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}
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/** {@inheritDoc} */
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@Override()
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public boolean isMultiValued()
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{
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return false;
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}
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/** {@inheritDoc} */
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@Override()
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public Set<AttributeValue> getValues(Entry entry,VirtualAttributeRule rule)
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{
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try
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{
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ECLWorkflowElement eclwe = (ECLWorkflowElement)
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DirectoryServer.getWorkflowElement("EXTERNAL CHANGE LOG");
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if (eclwe!=null)
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{
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// Set a list of excluded domains (also exclude 'cn=changelog' itself)
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Set<String> excludedDomains =
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MultimasterReplication.getECLDisabledDomains();
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excludedDomains.add(ServerConstants.DN_EXTERNAL_CHANGELOG_ROOT);
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final ReplicationServer rs = eclwe.getReplicationServer();
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String newestCookie = rs.getNewestECLCookie(excludedDomains).toString();
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final ByteString cookie = ByteString.valueOf(newestCookie);
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return Collections.singleton(AttributeValues.create(cookie, cookie));
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}
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}
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catch (Exception e)
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{
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logger.traceException(e);
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}
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return Collections.emptySet();
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}
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/** {@inheritDoc} */
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@Override()
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public boolean isSearchable(VirtualAttributeRule rule,
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SearchOperation searchOperation,
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boolean isPreIndexed)
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{
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// We do not allow search for the lastCookie. It's a read-only
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// attribute of the RootDSE.
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return false;
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}
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/** {@inheritDoc} */
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@Override()
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public void processSearch(VirtualAttributeRule rule,
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SearchOperation searchOperation)
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{
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searchOperation.setResultCode(ResultCode.UNWILLING_TO_PERFORM);
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final LocalizableMessage message = ERR_LASTCOOKIE_VATTR_NOT_SEARCHABLE.get(
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rule.getAttributeType().getNameOrOID());
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searchOperation.appendErrorMessage(message);
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}
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/** {@inheritDoc} */
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@Override
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public boolean isConfigurationChangeAcceptable(
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UserDefinedVirtualAttributeCfg configuration,
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List<LocalizableMessage> unacceptableReasons)
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{
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return false;
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}
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/** {@inheritDoc} */
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@Override
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public ConfigChangeResult applyConfigurationChange(
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UserDefinedVirtualAttributeCfg configuration)
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{
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return new ConfigChangeResult(ResultCode.OTHER, false);
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}
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}
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