/*
|
* 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 2013 ForgeRock AS
|
*/
|
package org.opends.server.replication.server.changelog.api;
|
|
|
/**
|
* This class stores an index of all the changes seen by this server in the form
|
* of {@link CNIndexRecord}s. The records are sorted by a global ordering as
|
* defined in the CSN class. The index links a <code>changeNumber</code> to the
|
* corresponding CSN. The CSN then links to a corresponding change in one of the
|
* ReplicaDBs.
|
*
|
* @see <a href=
|
* "https://wikis.forgerock.org/confluence/display/OPENDJ/OpenDJ+Domain+Names"
|
* >OpenDJ Domain Names</a> for more information about the changelog.
|
* @see <a href= "http://tools.ietf.org/html/draft-good-ldap-changelog-04"
|
* >OpenDJ Domain Names</a> for more information about the changeNumber.
|
*/
|
public interface ChangeNumberIndexDB
|
{
|
|
/**
|
* Returns the last generated change number.
|
*
|
* @return the last generated change number
|
*/
|
long getLastGeneratedChangeNumber();
|
|
/**
|
* Get the oldest record stored in this DB.
|
*
|
* @return Returns the oldest {@link CNIndexRecord} in this DB, null when the
|
* DB is empty or closed
|
* @throws ChangelogException
|
* if a database problem occurs.
|
*/
|
CNIndexRecord getOldestRecord() throws ChangelogException;
|
|
/**
|
* Get the newest record stored in this DB.
|
*
|
* @return Returns the newest {@link CNIndexRecord} in this DB, null when the
|
* DB is empty or closed
|
* @throws ChangelogException
|
* if a database problem occurs.
|
*/
|
CNIndexRecord getNewestRecord() throws ChangelogException;
|
|
/**
|
* Add an update to the list of messages that must be saved to this DB managed
|
* by this DB and return the changeNumber associated to this record.
|
* <p>
|
* Note: this method disregards the changeNumber in the provided record.
|
* <p>
|
* FIXME will be removed when ECLServerHandler will not be responsible anymore
|
* for lazily building the ChangeNumberIndexDB.
|
*
|
* @param record
|
* The {@link CNIndexRecord} to add to this DB.
|
* @return the change number associated to this record on adding to this DB
|
* @throws ChangelogException
|
* if a database problem occurs.
|
*/
|
long addRecord(CNIndexRecord record) throws ChangelogException;
|
|
/**
|
* Generate a new {@link DBCursor} that allows to browse the db managed by
|
* this object and starting at the position defined by a given changeNumber.
|
*
|
* @param startChangeNumber
|
* The position where the iterator must start.
|
* @return a new ReplicationIterator that allows to browse this DB managed by
|
* this object and starting at the position defined by a given
|
* changeNumber.
|
* @throws ChangelogException
|
* if a database problem occurs.
|
*/
|
DBCursor<CNIndexRecord> getCursorFrom(long startChangeNumber)
|
throws ChangelogException;
|
|
}
|
