/*
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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 2006-2007 Sun Microsystems, Inc.
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*/
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package org.opends.server.extensions;
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import org.opends.messages.Message;
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import java.util.ArrayList;
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import java.util.List;
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import org.opends.server.admin.server.ConfigurationChangeListener;
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import org.opends.server.admin.std.server.EntryCacheCfg;
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import org.opends.server.api.Backend;
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import org.opends.server.api.EntryCache;
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import org.opends.server.config.ConfigException;
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import org.opends.server.types.ConfigChangeResult;
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import org.opends.server.types.DN;
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import org.opends.server.types.Entry;
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import org.opends.server.types.InitializationException;
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import org.opends.server.types.ResultCode;
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/**
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* This class defines the default entry cache that will be used in the server if
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* none is configured. It does not actually store any entries, so all calls to
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* <CODE>getEntry</CODE> will return <CODE>null</CODE>, and all calls to
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* <CODE>putEntry</CODE> will return immediately without doing anything.
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*/
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public class DefaultEntryCache
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extends EntryCache<EntryCacheCfg>
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implements ConfigurationChangeListener<EntryCacheCfg>
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{
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/**
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* Creates a new instance of this default entry cache.
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*/
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public DefaultEntryCache()
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{
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super();
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}
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/**
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* {@inheritDoc}
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*/
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public void initializeEntryCache(EntryCacheCfg configEntry)
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throws ConfigException, InitializationException
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{
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// No implementation required.
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}
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/**
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* {@inheritDoc}
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*/
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public void finalizeEntryCache()
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{
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// No implementation required.
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}
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/**
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* {@inheritDoc}
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*/
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public boolean containsEntry(DN entryDN)
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{
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// This implementation does not store any entries.
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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 Entry getEntry(DN entryDN)
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{
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// This implementation does not store any entries.
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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 long getEntryID(DN entryDN)
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{
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// This implementation does not store any entries.
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return -1;
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}
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/**
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* {@inheritDoc}
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*/
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protected DN getEntryDN(Backend backend, long entryID)
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{
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// This implementation does not store any entries.
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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 putEntry(Entry entry, Backend backend, long entryID)
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{
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// This implementation does not store entries.
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}
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/**
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* {@inheritDoc}
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*/
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public boolean putEntryIfAbsent(Entry entry, Backend backend, long entryID)
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{
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// This implementation does not store entries, so we will never have a
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// conflict.
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return true;
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}
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/**
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* {@inheritDoc}
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*/
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public void removeEntry(DN entryDN)
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{
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// This implementation does not store entries.
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}
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/**
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* {@inheritDoc}
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*/
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public void clear()
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{
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// This implementation does not store entries.
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}
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/**
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* {@inheritDoc}
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*/
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public void clearBackend(Backend backend)
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{
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// This implementation does not store entries.
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}
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/**
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* {@inheritDoc}
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*/
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public void clearSubtree(DN baseDN)
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{
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// This implementation does not store entries.
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}
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/**
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* {@inheritDoc}
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*/
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public void handleLowMemory()
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{
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// This implementation does not store entries, so there are no resources
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// that it can free.
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}
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/**
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* {@inheritDoc}
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*/
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public boolean isConfigurationChangeAcceptable(
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EntryCacheCfg configuration,
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List<Message> unacceptableReasons
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)
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{
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// No implementation required.
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return true;
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}
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/**
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* {@inheritDoc}
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*/
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public ConfigChangeResult applyConfigurationChange(
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EntryCacheCfg configuration
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)
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{
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// No implementation required.
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ConfigChangeResult changeResult = new ConfigChangeResult(
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ResultCode.SUCCESS, false, new ArrayList<Message>()
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);
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return changeResult;
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}
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}
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