/*
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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 2006-2010 Sun Microsystems, Inc.
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* Portions Copyright 2014-2015 ForgeRock AS
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*/
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package org.opends.server.backends.pluggable;
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import static org.opends.server.backends.pluggable.JebFormat.*;
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import org.forgerock.opendj.ldap.ByteString;
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import org.opends.server.backends.pluggable.spi.ReadableTransaction;
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import org.opends.server.backends.pluggable.spi.StorageRuntimeException;
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import org.opends.server.backends.pluggable.spi.TreeName;
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import org.opends.server.backends.pluggable.spi.WriteableTransaction;
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import org.opends.server.types.DN;
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/**
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* This class represents the DN database, or dn2id, which has one record
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* for each entry. The key is the normalized entry DN and the value
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* is the entry ID.
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*/
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class DN2ID extends DatabaseContainer
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{
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private final int prefixRDNComponents;
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/**
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* Create a DN2ID instance for the DN database in a given entryContainer.
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*
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* @param treeName The name of the DN database.
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* @param entryContainer The entryContainer of the DN database.
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* @throws StorageRuntimeException If an error occurs in the database.
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*/
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DN2ID(TreeName treeName, EntryContainer entryContainer) throws StorageRuntimeException
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{
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super(treeName);
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prefixRDNComponents = entryContainer.getBaseDN().size();
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}
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/**
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* Adds a new record into the DN database replacing any existing record having the same DN.
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* @param txn a non null database transaction
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* @param dn The entry DN, which is the key to the record.
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* @param id The entry ID, which is the value of the record.
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* @throws StorageRuntimeException If an error occurred while attempting to insert
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* the new record.
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*/
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void put(WriteableTransaction txn, DN dn, EntryID id) throws StorageRuntimeException
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{
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ByteString key = dnToDNKey(dn, prefixRDNComponents);
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ByteString value = id.toByteString();
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txn.put(getName(), key, value);
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}
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/**
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* Remove a record from the DN database.
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* @param txn a non null database transaction
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* @param dn The entry DN, which is the key to the record.
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* @return true if the record was removed, false if it was not removed.
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* @throws StorageRuntimeException If an error occurred while attempting to remove
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* the record.
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*/
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boolean remove(WriteableTransaction txn, DN dn) throws StorageRuntimeException
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{
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ByteString key = dnToDNKey(dn, prefixRDNComponents);
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return txn.delete(getName(), key);
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}
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/**
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* Fetch the entry ID for a given DN.
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* @param txn a non null database transaction
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* @param dn The DN for which the entry ID is desired.
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* @return The entry ID, or null if the given DN is not in the DN database.
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* @throws StorageRuntimeException If an error occurs in the database.
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*/
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EntryID get(ReadableTransaction txn, DN dn) throws StorageRuntimeException
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{
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ByteString key = dnToDNKey(dn, prefixRDNComponents);
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ByteString value = txn.read(getName(), key);
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if (value != null)
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{
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return new EntryID(value);
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}
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return null;
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}
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}
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