/*
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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 2006-2008 Sun Microsystems, Inc.
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*/
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package org.opends.server.loggers;
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import org.opends.messages.Message;
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import static org.opends.messages.LoggerMessages.ERR_LOGGER_ERROR_LISTING_FILES;
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import org.opends.server.admin.std.server.SizeLimitLogRetentionPolicyCfg;
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import org.opends.server.admin.server.ConfigurationChangeListener;
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import static org.opends.server.loggers.debug.DebugLogger.*;
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import org.opends.server.loggers.debug.DebugTracer;
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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.DirectoryException;
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import org.opends.server.core.DirectoryServer;
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import java.io.File;
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import java.util.Arrays;
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import java.util.List;
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import java.util.ArrayList;
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/**
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* This class implements a retention policy based on the amount of
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* space taken by the log files.
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*/
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public class SizeBasedRetentionPolicy implements
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RetentionPolicy<SizeLimitLogRetentionPolicyCfg>,
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ConfigurationChangeListener<SizeLimitLogRetentionPolicyCfg>
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{
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/**
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* The tracer object for the debug logger.
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*/
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private static final DebugTracer TRACER = getTracer();
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private long size = 0;
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private SizeLimitLogRetentionPolicyCfg config;
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/**
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* {@inheritDoc}
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*/
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public void initializeLogRetentionPolicy(
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SizeLimitLogRetentionPolicyCfg config)
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{
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this.size = config.getDiskSpaceUsed();
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this.config = config;
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config.addSizeLimitChangeListener(this);
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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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SizeLimitLogRetentionPolicyCfg config,
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List<Message> 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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/**
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* {@inheritDoc}
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*/
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public ConfigChangeResult applyConfigurationChange(
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SizeLimitLogRetentionPolicyCfg config)
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{
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// Default result code.
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ResultCode resultCode = ResultCode.SUCCESS;
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boolean adminActionRequired = false;
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ArrayList<Message> messages = new ArrayList<Message>();
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this.size = config.getDiskSpaceUsed();
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this.config = config;
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return new ConfigChangeResult(resultCode, adminActionRequired, messages);
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}
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/**
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* {@inheritDoc}
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*/
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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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Message message =
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ERR_LOGGER_ERROR_LISTING_FILES.get(
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fileNamingPolicy.getInitialName().toString());
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throw new DirectoryException(DirectoryServer.getServerErrorResultCode(),
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message);
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}
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ArrayList<File> filesToDelete = new ArrayList<File>();
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long totalLength = 0;
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for (File file : files)
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{
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totalLength += file.length();
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}
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if(debugEnabled())
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{
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TRACER.debugInfo("Total size of files: %d, Max: %d", totalLength, size);
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}
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if (totalLength <= size)
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{
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return new File[0];
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}
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long freeSpaceNeeded = totalLength - size;
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// Sort files based on last modified time.
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Arrays.sort(files, new FileComparator());
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long freedSpace = 0;
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for (int j = files.length - 1; j < 1; j--)
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{
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freedSpace += files[j].length();
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filesToDelete.add(files[j]);
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if (freedSpace >= freeSpaceNeeded)
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{
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break;
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}
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}
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return filesToDelete.toArray(new File[0]);
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}
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/**
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* {@inheritDoc}
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*/
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public String toString()
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{
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return "Size Based Retention Policy " + config.dn().toString();
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}
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}
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