/*
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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 Sun Microsystems, Inc.
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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.util.Arrays;
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import static org.opends.server.loggers.Debug.*;
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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 RetentionPolicy
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{
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private static final String CLASS_NAME =
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"org.opends.server.loggers.FileNumberRetentionPolicy";
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private int numFiles = 0;
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private File directory = null;
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private String prefix = null;
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/**
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* Create the retention policy based on the number of files.
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*
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* @param dir The directory in which the log files reside.
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* @param prefix The prefix for the log file names.
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* @param numFiles The number of files on disk.
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*/
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public FileNumberRetentionPolicy(String dir, String prefix, int numFiles)
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{
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assert debugConstructor(CLASS_NAME, String.valueOf(dir),
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String.valueOf(prefix), String.valueOf(numFiles));
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this.numFiles = numFiles;
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this.directory = new File(dir);
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this.prefix = prefix;
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}
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/**
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* This method deletes files based on the policy.
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*
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* @return number of files deleted.
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*/
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public int deleteFiles()
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{
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assert debugEnter(CLASS_NAME, "deleteFiles");
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int count = 0;
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File[] selectedFiles = directory.listFiles(new LogFileFilter(prefix));
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if(selectedFiles.length <= numFiles)
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{
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return 0;
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}
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// Sort files based on last modified time.
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Arrays.sort(selectedFiles, new FileComparator());
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for(int j = numFiles; j < selectedFiles.length; j++)
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{
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// System.out.println("Deleting log file:" + selectedFiles[j]);
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selectedFiles[j].delete();
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count++;
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}
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return count;
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}
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}
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