/*
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* The contents of this file are subject to the terms of the Common Development and
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* Distribution License (the License). You may not use this file except in compliance with the
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* License.
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*
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* You can obtain a copy of the License at legal/CDDLv1.0.txt. See the License for the
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* specific language governing permission and limitations under the License.
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*
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* When distributing Covered Software, include this CDDL Header Notice in each file and include
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* the License file at legal/CDDLv1.0.txt. If applicable, add the following below the CDDL
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* Header, with the fields enclosed by brackets [] replaced by your own identifying
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* information: "Portions Copyright [year] [name of copyright owner]".
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*
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* Copyright 2006-2008 Sun Microsystems, Inc.
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* Portions Copyright 2014-2016 ForgeRock AS.
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*/
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package org.opends.server.loggers;
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import static org.opends.messages.LoggerMessages.*;
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import java.io.File;
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import java.util.ArrayList;
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import java.util.Arrays;
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import java.util.List;
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import org.forgerock.i18n.LocalizableMessage;
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import org.forgerock.opendj.config.server.ConfigurationChangeListener;
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import org.forgerock.opendj.server.config.server.FileCountLogRetentionPolicyCfg;
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import org.opends.server.core.DirectoryServer;
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import org.forgerock.opendj.config.server.ConfigChangeResult;
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import org.opends.server.types.DirectoryException;
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/**
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* This class implements a retention policy based on the number of files.
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* Files will be cleaned up based on the number of files on disk.
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*/
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public class FileNumberRetentionPolicy implements
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RetentionPolicy<FileCountLogRetentionPolicyCfg>,
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ConfigurationChangeListener<FileCountLogRetentionPolicyCfg>
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{
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private int numFiles;
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private FileCountLogRetentionPolicyCfg config;
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/** {@inheritDoc} */
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public void initializeLogRetentionPolicy(
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FileCountLogRetentionPolicyCfg config)
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{
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this.numFiles = config.getNumberOfFiles();
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this.config = config;
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config.addFileCountChangeListener(this);
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}
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/** {@inheritDoc} */
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public boolean isConfigurationChangeAcceptable(
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FileCountLogRetentionPolicyCfg config,
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List<LocalizableMessage> unacceptableReasons)
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{
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// Changes should always be OK
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return true;
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}
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/** {@inheritDoc} */
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public ConfigChangeResult applyConfigurationChange(
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FileCountLogRetentionPolicyCfg config)
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{
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this.numFiles = config.getNumberOfFiles();
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this.config = config;
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return new ConfigChangeResult();
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}
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/** {@inheritDoc} */
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public File[] deleteFiles(FileNamingPolicy fileNamingPolicy)
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throws DirectoryException
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{
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File[] files = fileNamingPolicy.listFiles();
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if(files == null)
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{
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throw new DirectoryException(DirectoryServer.getServerErrorResultCode(),
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ERR_LOGGER_ERROR_LISTING_FILES.get(fileNamingPolicy.getInitialName()));
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}
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if (files.length <= numFiles)
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{
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return new File[0];
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}
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// Sort files based on last modified time.
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Arrays.sort(files, new FileComparator());
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ArrayList<File> filesToDelete = new ArrayList<>();
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for (int j = numFiles; j < files.length; j++)
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{
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filesToDelete.add(files[j]);
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}
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return filesToDelete.toArray(new File[0]);
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}
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/** {@inheritDoc} */
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public String toString()
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{
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return "Free Number Retention Policy " + config.dn();
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}
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}
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