/*
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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
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* trunk/opends/resource/legal-notices/OpenDS.LICENSE
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* or https://OpenDS.dev.java.net/OpenDS.LICENSE.
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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
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* trunk/opends/resource/legal-notices/OpenDS.LICENSE. If applicable,
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* add the following below this CDDL HEADER, with the fields enclosed
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* by brackets "[]" replaced with your own identifying * 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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* Portions Copyright 2006 Sun Microsystems, Inc.
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*/
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package org.opends.server.synchronization;
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import java.util.HashMap;
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import java.util.Map;
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import org.opends.server.api.ConfigAddListener;
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import org.opends.server.api.ConfigChangeListener;
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import org.opends.server.api.ConfigDeleteListener;
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import org.opends.server.api.SynchronizationProvider;
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import org.opends.server.changelog.Changelog;
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import org.opends.server.config.ConfigEntry;
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import org.opends.server.config.ConfigException;
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import org.opends.server.core.AddOperation;
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import org.opends.server.types.DN;
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import org.opends.server.core.DeleteOperation;
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import org.opends.server.core.DirectoryException;
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import org.opends.server.core.DirectoryServer;
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import org.opends.server.types.Entry;
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import org.opends.server.core.ModifyDNOperation;
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import org.opends.server.core.ModifyOperation;
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import org.opends.server.core.Operation;
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import org.opends.server.types.ConfigChangeResult;
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import org.opends.server.types.ResultCode;
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import org.opends.server.types.SynchronizationProviderResult;
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import static org.opends.server.synchronization.SynchMessages.*;
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/**
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* This class is used to load the Synchronization code inside the JVM
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* and to trigger initialization of the synchronization.
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*
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* It also extends the SynchronizationProvider class in order to have some
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* synchronization code running during the operation process
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* as pre-op, conflictRsolution, and post-op.
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*/
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public class MultimasterSynchronization extends SynchronizationProvider
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implements ConfigAddListener, ConfigDeleteListener, ConfigChangeListener
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{
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static String CHANGELOG_DN = "cn=Changelog Server," +
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"cn=Multimaster Synchronization, cn=Synchronization Providers, cn=config";
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static String SYNCHRONIZATION_CLASS =
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"ds-cfg-synchronization-provider-config";
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private Changelog changelog = null;
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private static Map<DN, SynchronizationDomain> domains =
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new HashMap<DN, SynchronizationDomain>() ;
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/**
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* {@inheritDoc}
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*/
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public void initializeSynchronizationProvider(ConfigEntry configEntry)
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throws ConfigException
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{
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DN configEntryDn = null;
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SynchMessages.registerMessages();
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configEntry.registerAddListener(this);
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configEntry.registerDeleteListener(this);
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/*
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* Read changelog server the changelog configuration entry
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*/
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try
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{
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configEntryDn = DN.decode(CHANGELOG_DN);
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ConfigEntry config = DirectoryServer.getConfigEntry(configEntryDn);
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/*
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* If there is no such entry, this process must not be a changelog server
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*/
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if (config != null)
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{
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changelog = new Changelog(config);
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}
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} catch (DirectoryException e)
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{
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/* never happens */
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throw new ConfigException(MSGID_SYNC_INVALID_DN,
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"Invalid Changelog configuration DN");
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}
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/*
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* Parse the list of entries below configEntry,
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* create one synchronization domain for each child
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*/
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for (ConfigEntry domainEntry : configEntry.getChildren().values())
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{
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if (domainEntry.hasObjectClass(SYNCHRONIZATION_CLASS))
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{
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SynchronizationDomain domain = new SynchronizationDomain(domainEntry);
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domains.put(domain.getBaseDN(), domain);
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domain.start();
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}
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}
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}
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/**
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* Indicates whether the configuration entry that will result from a proposed
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* modification is acceptable to this change listener.
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*
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* @param configEntry The configuration entry that will result from
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* the requested update.
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* @param unacceptableReason A buffer to which this method can append a
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* human-readable message explaining why the
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* proposed change is not acceptable.
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*
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* @return <CODE>true</CODE> if the proposed entry contains an acceptable
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* configuration, or <CODE>false</CODE> if it does not.
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*/
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public boolean configChangeIsAcceptable(ConfigEntry configEntry,
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StringBuilder unacceptableReason)
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{
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return false; // TODO :NYI
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}
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/**
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* Attempts to apply a new configuration to this Directory Server component
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* based on the provided changed entry.
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*
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* @param configEntry The configuration entry that containing the updated
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* configuration for this component.
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*
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* @return Information about the result of processing the configuration
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* change.
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*/
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public ConfigChangeResult applyConfigurationChange(ConfigEntry configEntry)
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{
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// TODO implement this method
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return new ConfigChangeResult(ResultCode.SUCCESS, false);
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}
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/**
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* {@inheritDoc}
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*/
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public boolean configAddIsAcceptable(ConfigEntry configEntry,
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StringBuilder unacceptableReason)
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{
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// TODO Auto-generated method stub
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return false;
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}
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/**
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* {@inheritDoc}
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*/
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public ConfigChangeResult applyConfigurationAdd(ConfigEntry configEntry)
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{
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// TODO Auto-generated method stub
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return null;
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}
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/**
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* {@inheritDoc}
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*/
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public boolean configDeleteIsAcceptable(ConfigEntry configEntry,
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StringBuilder unacceptableReason)
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{
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// TODO Auto-generated method stub
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return false;
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}
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/**
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* {@inheritDoc}
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*/
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public ConfigChangeResult applyConfigurationDelete(ConfigEntry configEntry)
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{
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// TODO Auto-generated method stub
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return null;
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}
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/**
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* {@inheritDoc}
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*/
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public void doPostOperation(AddOperation addOperation)
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{
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DN dn = addOperation.getEntryDN();
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genericPostOperation(addOperation, dn);
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}
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/**
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* {@inheritDoc}
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*/
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public void doPostOperation(DeleteOperation deleteOperation)
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{
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DN dn = deleteOperation.getEntryDN();
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genericPostOperation(deleteOperation, dn);
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}
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/**
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* {@inheritDoc}
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*/
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public void doPostOperation(ModifyDNOperation modifyDNOperation)
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{
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DN dn = modifyDNOperation.getEntryDN();
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genericPostOperation(modifyDNOperation, dn);
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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 void doPostOperation(ModifyOperation modifyOperation)
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{
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DN dn = modifyOperation.getEntryDN();
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genericPostOperation(modifyOperation, dn);
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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 SynchronizationProviderResult handleConflictResolution(
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ModifyOperation modifyOperation)
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{
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SynchronizationDomain domain = findDomain(modifyOperation.getEntryDN());
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if (domain == null)
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return new SynchronizationProviderResult(true);
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return domain.handleConflictResolution(modifyOperation);
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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 SynchronizationProviderResult
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doPreOperation(ModifyOperation modifyOperation)
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{
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SynchronizationDomain domain = findDomain(modifyOperation.getEntryDN());
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if (domain == null)
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return new SynchronizationProviderResult(true);
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Historical historicalInformation = (Historical)
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modifyOperation.getAttachment(HISTORICAL);
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if (historicalInformation == null)
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{
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Entry entry = modifyOperation.getModifiedEntry();
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historicalInformation = Historical.load(entry);
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modifyOperation.setAttachment(HISTORICAL, historicalInformation);
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}
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historicalInformation.generateState(modifyOperation);
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return new SynchronizationProviderResult(true);
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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 SynchronizationProviderResult doPreOperation(AddOperation addOperation)
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{
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SynchronizationDomain domain = findDomain(addOperation.getEntryDN());
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if (domain == null)
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return new SynchronizationProviderResult(true);
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domain.setChangeNumber(addOperation);
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return new SynchronizationProviderResult(true);
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}
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/**
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* Pre-operation processing.
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* Called after operation has been processed by the core server
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* but before being committed to the backend
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* Generate the Change number and update the historical information
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*
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* @param deleteOperation the current operation
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* @return code indicating if operation must be processed
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*/
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@Override
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public SynchronizationProviderResult
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doPreOperation(DeleteOperation deleteOperation)
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{
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SynchronizationDomain domain = findDomain(deleteOperation.getEntryDN());
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if (domain == null)
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return new SynchronizationProviderResult(true);
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domain.setChangeNumber(deleteOperation);
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return new SynchronizationProviderResult(true);
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}
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/**
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* Pre-operation processing.
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* Called after operation has been processed by the core server
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* but before being committed to the backend
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* Generate the Change number and update the historical information
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*
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* @param modifyDNOperation the current operation
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* @return code indicating if operation must be processed
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*/
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@Override
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public SynchronizationProviderResult
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doPreOperation(ModifyDNOperation modifyDNOperation)
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{
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SynchronizationDomain domain = findDomain(modifyDNOperation.getEntryDN());
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if (domain == null)
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return new SynchronizationProviderResult(true);
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domain.setChangeNumber(modifyDNOperation);
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return new SynchronizationProviderResult(true);
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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 void finalizeSynchronizationProvider()
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{
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// shutdown all the Synchronization domains
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for (SynchronizationDomain domain : domains.values())
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{
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domain.shutdown();
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}
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// shutdown the Changelog Service if necessary
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if (changelog != null)
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Changelog.shutdown();
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}
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/**
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* Finds the Synchronization domain for a given DN.
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*
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* @param dn The DN for which the domain must be returned.
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* @return The Synchronization domain for this DN.
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*/
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private static SynchronizationDomain findDomain(DN dn)
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{
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SynchronizationDomain domain = null;
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DN temp = dn;
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do
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{
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domain = domains.get(temp);
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temp = temp.getParent();
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if (temp == null)
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{
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break;
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}
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} while (domain == null);
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if ((domain!= null) && (domain.getServerStateDN().equals(dn)))
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return null;
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return domain;
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}
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/**
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* Generic code for all the postOperation entry point.
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*
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* @param operation The Operation for which the post-operation is called.
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* @param dn The Dn for which the post-operation is called.
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*/
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private void genericPostOperation(Operation operation, DN dn)
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{
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SynchronizationDomain domain = findDomain(dn);
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if (domain == null)
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return;
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domain.synchronize(operation);
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return;
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}
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/**
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* Get the ServerState associated to the SynchronizationDomain
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* with a given DN.
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*
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* @param baseDn The DN of the Synchronization Domain for which the
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* ServerState must be returned.
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* @return the ServerState associated to the SynchronizationDomain
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* with the DN in parameter.
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*/
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public static ServerState getServerState(DN baseDn)
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{
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SynchronizationDomain domain = findDomain(baseDn);
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return domain.getServerState();
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}
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}
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