The version of Apache log4j used by SoundHelix.
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SlidingWindowRollingPolicy.java
/*
* Copyright 1999,2004 The Apache Software Foundation.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.log4j.rolling;
import org.apache.log4j.Logger;
import org.apache.log4j.rolling.helper.Compress;
import org.apache.log4j.rolling.helper.FileNamePattern;
import org.apache.log4j.rolling.helper.Util;
import java.io.File;
/**
* The SlidingWindowRollingPolicy rolls over files
*
* @author Ceki Gülcü
* @since 1.3
* */
public class SlidingWindowRollingPolicy extends RollingPolicySkeleton {
static Logger logger = Logger.getLogger(SlidingWindowRollingPolicy.class);
int maxIndex;
int minIndex;
FileNamePattern fileNamePattern;
String fileNamePatternStr;
String activeFileName;
public SlidingWindowRollingPolicy() {
minIndex = 1;
maxIndex = 7;
activeFileName = null;
}
public void activateOptions() {
if (activeFileName == null) {
logger.warn(
"The active file name option must be set before using this rolling policy.");
throw new IllegalStateException(
"The activeFileName option must be set.");
}
if (maxIndex < minIndex) {
logger.warn(
"maxIndex (" + maxIndex + ") cannot be smaller than minIndex ("
+ minIndex + ").");
logger.warn("Setting maxIndex to equal minIndex.");
maxIndex = minIndex;
}
switch (compressionMode) {
case Compress.GZ:
if (!fileNamePatternStr.endsWith(".gz")) {
fileNamePatternStr = fileNamePatternStr + ".gz";
}
break;
}
fileNamePattern = new FileNamePattern(fileNamePatternStr);
}
public void rollover() throws RolloverFailure {
// Inside this method it is guaranteed that the hereto active log fil is closed.
// If maxIndex <= 0, then there is no file renaming to be done.
if (maxIndex >= 0) {
// Delete the oldest file, to keep Windows happy.
File file = new File(fileNamePattern.convert(maxIndex));
if (file.exists()) {
file.delete();
}
// Map {(maxIndex - 1), ..., minIndex} to {maxIndex, ..., minIndex+1}
for (int i = maxIndex - 1; i >= minIndex; i--) {
Util.rename(
fileNamePattern.convert(i), fileNamePattern.convert(i + 1));
}
if (activeFileName != null) {
//move active file name to min
switch (compressionMode) {
case Compress.NONE:
Util.rename(activeFileName, fileNamePattern.convert(minIndex));
break;
case Compress.GZ:
Compress.GZCompress(
activeFileName, fileNamePattern.convert(minIndex));
break;
}
}
}
}
/**
*
* If the <b>ActiveFileName</b> option is set, then this method simply returns the
* value of the option. Otherwise, it returns the value of <b>FileNamePattern</b>
* for <b>MaxIndex</b>. For example, if <b>ActiveFileName</b> is not set and
* <b>FileNamePattern</b> is set to "mylogfile.%i" and <b>MaxIndex</b> is set to 0,
* then this method will return "mylogfile.0".
*
*/
public String getActiveFileName() {
// TODO This is clearly bogus.
return activeFileName;
}
public int getMaxIndex() {
return maxIndex;
}
public int getMinIndex() {
return minIndex;
}
public void setMaxIndex(int maxIndex) {
this.maxIndex = maxIndex;
}
public void setMinIndex(int minIndex) {
this.minIndex = minIndex;
}
}