/*
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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 2006-2009 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.loggers;
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import java.io.File;
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import java.io.FilenameFilter;
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import org.forgerock.i18n.slf4j.LocalizedLogger;
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import org.opends.server.util.TimeThread;
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/**
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* A file name policy that names files suffixed by the time it was created.
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*/
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public class TimeStampNaming implements FileNamingPolicy
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{
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private static final LocalizedLogger logger = LocalizedLogger.getLoggerForThisClass();
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private File file;
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private TimeStampNamingFilter filter;
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/**
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* The FilenameFilter implementation for this naming policy to filter
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* for all the files named by this policy.
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*/
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private class TimeStampNamingFilter implements FilenameFilter
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{
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/**
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* Select only files that are named by this policy.
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*
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* @param dir The directory to search.
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* @param name The filename to which to apply the filter.
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*
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* @return <CODE>true</CODE> if the given filename matches the filter, or
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* <CODE>false</CODE> if it does not.
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*/
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public boolean accept(File dir, String name)
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{
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if(new File(dir, name).isDirectory())
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{
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return false;
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}
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String initialFileName = file.getName();
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// Make sure it is the expected length.
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if(name.length() != initialFileName.length() + 16)
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{
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return false;
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}
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int pos;
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// Make sure we got the expected name prefix.
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for(pos = 0; pos < initialFileName.length(); pos++)
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{
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if(name.charAt(pos) != initialFileName.charAt(pos))
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{
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return false;
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}
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}
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// Make sure there is a period between the prefix and timestamp.
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if(name.charAt(pos) != '.')
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{
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return false;
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}
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char c;
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// Make sure there are 14 numbers for the timestamp.
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for(pos++; pos < name.length() - 1; pos++)
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{
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c = name.charAt(pos);
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if(c < 48 || c > 57)
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{
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return false;
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}
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}
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// And ends with an Z.
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return name.charAt(pos) == 'Z';
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}
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}
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/**
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* Create a new instance of the TimeStampNaming policy. Files will be created
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* with the names in the prefix.utctime format.
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*
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* @param file the file to use as the naming prefix.
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*/
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public TimeStampNaming(File file)
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{
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this.file = file;
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this.filter = new TimeStampNamingFilter();
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}
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/** {@inheritDoc} */
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public File getInitialName()
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{
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return file;
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}
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/** {@inheritDoc} */
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public File getNextName()
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{
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return new File(file + "." + TimeThread.getGMTTime());
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}
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/** {@inheritDoc} */
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public FilenameFilter getFilenameFilter()
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{
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return filter;
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}
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/** {@inheritDoc} */
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public File[] listFiles()
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{
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File directory = file.getParentFile();
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File[] files = directory.listFiles(filter);
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if(files == null)
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{
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logger.trace("Unable to list files named by policy " +
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"with initial file %s in directory %s", file, directory);
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}
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return files;
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}
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}
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