org.apache.tomee.jul.handler.rotating.LocalFileHandler Maven / Gradle / Ivy
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* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.tomee.jul.handler.rotating;
import org.apache.commons.io.FileUtils;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.FilenameFilter;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.io.UnsupportedEncodingException;
import java.sql.Timestamp;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReadWriteLock;
import java.util.concurrent.locks.ReentrantLock;
import java.util.concurrent.locks.ReentrantReadWriteLock;
import java.util.logging.ErrorManager;
import java.util.logging.Filter;
import java.util.logging.Formatter;
import java.util.logging.Handler;
import java.util.logging.Level;
import java.util.logging.LogManager;
import java.util.logging.LogRecord;
import java.util.logging.SimpleFormatter;
import java.util.regex.Pattern;
import java.util.zip.Deflater;
import java.util.zip.GZIPOutputStream;
import java.util.zip.ZipEntry;
import java.util.zip.ZipOutputStream;
/**
* NOTE: for simplicity the prefix `org.apache.tomee.jul.handler.rotating.LocalFileHandler.` has been removed of name columns.
*
* |===
* | Name | Default Value | Description
* | filenamePattern | ${catalina.base}/logs/logs.%s.%03d.log | where log files are created, it uses String.format() and gives you the date and file number - in this order.
* | limit | 10 Megabytes | limit size indicating the file should be rotated
* | dateCheckInterval | 5 seconds | how often the date should be computed to rotate the file (don't do it each time for performances reason, means you can get few records of next day in a file name with current day)
* | bufferSize | -1 bytes | if positive the in memory buffer used to store data before flushing them to the disk
* | encoding | - | file encoding
* | level | ALL | level this handler accepts
* | filter | - | filter used to check if the message should be logged
* | formatter | java.util.logging.SimpleFormatter | formatter used to format messages
* | archiveDirectory | ${catalina.base}/logs/archives/ | where compressed logs are put.
* | archiveFormat | gzip | zip or gzip.
* | archiveOlderThan | -1 days | how many days files are kept before being compressed
* | purgeOlderThan | -1 days | how many days files are kept before being deleted, note: it applies on archives and not log files so 2 days of archiving and 3 days of purge makes it deleted after 5 days.
* | compressionLevel | -1 | In case of zip archiving the zip compression level (-1 for off or 0-9).
* |===
*
* NOTE: archiving and purging are done only when a file is rotated, it means it can be ignored during days if there is no logging activity.
*
* NOTE: archiving and purging is done in a background thread pool, you can configure the number of threads in thanks to
* `org.apache.tomee.jul.handler.rotating.BackgroundTaskRunner.threads` property in `conf/logging.properties`.
* Default is 2 which should be fine for most applications.
*/
/*
Open point/enhancements:
- date pattern/filename pattern instead of hardcoded String.format?
- write another async version? ensure it flushed well, use disruptor? -> bench seems to show it is useless
*/
public class LocalFileHandler extends Handler {
private static final int BUFFER_SIZE = 8102;
private long limit;
private int bufferSize = -1;
private Pattern filenameRegex;
private Pattern archiveFilenameRegex;
private String filenamePattern = "${catalina.base}/logs/logs.%s.%03d.log";
private String archiveFormat = "gzip";
private long dateCheckInterval = TimeUnit.SECONDS.toMillis(5);
private long archiveExpiryDuration;
private int compressionLevel;
private long purgeExpiryDuration;
private File archiveDir;
private volatile int currentIndex;
private volatile long lastTimestamp;
private volatile String date;
private volatile PrintWriter writer;
private volatile int written;
private final ReadWriteLock writerLock = new ReentrantReadWriteLock();
private final Lock backgroundTaskLock = new ReentrantLock();
private volatile boolean closed;
public LocalFileHandler() {
configure();
}
private void configure() {
date = currentDate();
final String className = getClass().getName(); //allow classes to override
final ClassLoader cl = Thread.currentThread().getContextClassLoader();
dateCheckInterval = new Duration(getProperty(className + ".dateCheckInterval", String.valueOf(dateCheckInterval))).asMillis();
filenamePattern = replace(getProperty(className + ".filenamePattern", filenamePattern));
limit = new Size(getProperty(className + ".limit", String.valueOf("10 Mega"))).asBytes();
final int lastSep = Math.max(filenamePattern.lastIndexOf('/'), filenamePattern.lastIndexOf('\\'));
String fileNameReg = lastSep >= 0 ? filenamePattern.substring(lastSep + 1) : filenamePattern;
fileNameReg = fileNameReg.replace("%s", "\\d{4}\\-\\d{2}\\-\\d{2}"); // date.
{ // file rotation index
final int indexIdxStart = fileNameReg.indexOf('%');
if (indexIdxStart >= 0) {
final int indexIdxEnd = fileNameReg.indexOf('d', indexIdxStart);
if (indexIdxEnd >= 0) {
fileNameReg = fileNameReg.substring(0, indexIdxStart) + "\\d*" + fileNameReg.substring(indexIdxEnd + 1, fileNameReg.length());
}
}
}
filenameRegex = Pattern.compile(fileNameReg);
compressionLevel = Integer.parseInt(getProperty(className + ".compressionLevel", String.valueOf(Deflater.DEFAULT_COMPRESSION)));
archiveExpiryDuration = new Duration(getProperty(className + ".archiveOlderThan", String.valueOf("-1 days"))).asMillis();
archiveDir = new File(replace(getProperty(className + ".archiveDirectory", "${catalina.base}/logs/archives/")));
archiveFormat = replace(getProperty(className + ".archiveFormat", archiveFormat));
archiveFilenameRegex = Pattern.compile(fileNameReg + "\\." + archiveFormat);
purgeExpiryDuration = new Duration(getProperty(className + ".purgeOlderThan", String.valueOf("-1 days"))).asMillis();
try {
bufferSize = (int) new Size(getProperty(className + ".bufferSize", "-1 b")).asBytes();
} catch (final NumberFormatException ignore) {
// no-op
}
final String encoding = getProperty(className + ".encoding", null);
if (encoding != null && encoding.length() > 0) {
try {
setEncoding(encoding);
} catch (final UnsupportedEncodingException ex) {
// no-op
}
}
setLevel(Level.parse(getProperty(className + ".level", Level.ALL.getName())));
final String filterName = getProperty(className + ".filter", null);
if (filterName != null) {
try {
setFilter(Filter.class.cast(cl.loadClass(filterName).newInstance()));
} catch (final Exception e) {
// Ignore
}
}
final String formatterName = getProperty(className + ".formatter", null);
if (formatterName != null) {
try {
setFormatter(Formatter.class.cast(cl.loadClass(formatterName).newInstance()));
} catch (final Exception e) {
setFormatter(new SimpleFormatter());
}
} else {
setFormatter(new SimpleFormatter());
}
setErrorManager(new ErrorManager());
lastTimestamp = System.currentTimeMillis();
}
protected String currentDate() {
return new Timestamp(System.currentTimeMillis()).toString().substring(0, 10);
}
@Override
public void publish(final LogRecord record) {
if (!isLoggable(record)) {
return;
}
final long now = System.currentTimeMillis();
final String tsDate;
// just do it once / sec if we have a lot of log, can make some log appearing in the wrong file but better than doing it each time
if (now - lastTimestamp > dateCheckInterval) { // using as much as possible volatile to avoid to lock too much
lastTimestamp = now;
tsDate = currentDate();
} else {
tsDate = null;
}
try {
writerLock.readLock().lock();
rotateIfNeeded(tsDate);
final String result;
try {
result = getFormatter().format(record);
} catch (final Exception e) {
reportError(null, e, ErrorManager.FORMAT_FAILURE);
return;
}
try {
if (writer != null) {
writer.write(result);
if (bufferSize < 0) {
writer.flush();
}
} else {
reportError(getClass().getSimpleName() + " is closed or not yet initialized, unable to log [" + result + "]", null, ErrorManager.WRITE_FAILURE);
}
} catch (final Exception e) {
reportError(null, e, ErrorManager.WRITE_FAILURE);
}
} finally {
writerLock.readLock().unlock();
}
}
private void rotateIfNeeded(final String currentDate) {
if (!closed && writer == null) {
try {
writerLock.readLock().unlock();
writerLock.writeLock().lock();
if (!closed && writer == null) {
openWriter();
}
} finally {
writerLock.writeLock().unlock();
writerLock.readLock().lock();
}
} else if (shouldRotate(currentDate)) {
try {
writerLock.readLock().unlock();
writerLock.writeLock().lock();
if (shouldRotate(currentDate)) {
close();
if (currentDate != null && !date.equals(currentDate)) {
currentIndex = 0;
date = currentDate;
}
openWriter();
}
} finally {
writerLock.writeLock().unlock();
writerLock.readLock().lock();
}
}
}
private boolean shouldRotate(final String currentDate) { // new day, new file or limit exceeded
return currentDate != null && !date.equals(currentDate) || limit > 0 && written >= limit;
}
@Override
public void close() {
closed = true;
writerLock.writeLock().lock();
try {
if (writer == null) {
return;
}
writer.write(getFormatter().getTail(this));
writer.flush();
writer.close();
writer = null;
} catch (final Exception e) {
reportError(null, e, ErrorManager.CLOSE_FAILURE);
} finally {
writerLock.writeLock().unlock();
}
// wait for bg tasks if running
backgroundTaskLock.lock();
backgroundTaskLock.unlock();
}
@Override
public void flush() {
writerLock.readLock().lock();
try {
writer.flush();
} catch (final Exception e) {
reportError(null, e, ErrorManager.FLUSH_FAILURE);
} finally {
writerLock.readLock().unlock();
}
}
protected void openWriter() {
final long beforeRotation = System.currentTimeMillis();
writerLock.writeLock().lock();
FileOutputStream fos = null;
OutputStream os = null;
try {
File pathname;
do {
pathname = new File(formatFilename(filenamePattern, date, currentIndex));
final File parent = pathname.getParentFile();
if (!parent.isDirectory() && !parent.mkdirs()) {
reportError("Unable to create [" + parent + "]", null, ErrorManager.OPEN_FAILURE);
writer = null;
return;
}
currentIndex++;
} while (pathname.isFile()); // loop to ensure we don't overwrite existing files
final String encoding = getEncoding();
fos = new FileOutputStream(pathname, true);
os = new CountingStream(bufferSize > 0 ? new BufferedOutputStream(fos, bufferSize) : fos);
writer = new PrintWriter(encoding != null ? new OutputStreamWriter(os, encoding) : new OutputStreamWriter(os), false);
writer.write(getFormatter().getHead(this));
} catch (final Exception e) {
reportError(null, e, ErrorManager.OPEN_FAILURE);
writer = null;
if (fos != null) {
try {
fos.close();
} catch (final IOException e1) {
// no-op
}
}
if (os != null) {
try {
os.close();
} catch (final IOException e1) {
// no-op
}
}
} finally {
writerLock.writeLock().unlock();
}
BackgroundTaskRunner.push(new Runnable() {
@Override
public void run() {
backgroundTaskLock.lock();
try {
evict(beforeRotation);
} catch (final Exception e) {
reportError("Can't do the log eviction", e, ErrorManager.GENERIC_FAILURE);
} finally {
backgroundTaskLock.unlock();
}
}
});
}
private void evict(final long now) {
if (purgeExpiryDuration > 0) { // purging archives
final File[] archives = archiveDir.listFiles(new FilenameFilter() {
@Override
public boolean accept(final File dir, final String name) {
return archiveFilenameRegex.matcher(name).matches();
}
});
if (archives != null) {
for (final File archive : archives) {
try {
if (FileUtils.isFileOlder(archive, now - purgeExpiryDuration)) {
if (!FileUtils.deleteQuietly(archive)) {
// Do not try to delete on exit cause we will find it again
reportError("Failed to delete " + archive.getAbsolutePath() + ".", null, ErrorManager.GENERIC_FAILURE);
}
}
} catch (final Exception e) {
throw new IllegalStateException(e);
}
}
}
}
if (archiveExpiryDuration > 0) { // archiving log files
final File[] logs = new File(formatFilename(filenamePattern, "0000-00-00", 0)).getParentFile()
.listFiles(new FilenameFilter() {
@Override
public boolean accept(final File dir, final String name) {
return filenameRegex.matcher(name).matches();
}
});
if (logs != null) {
for (final File file : logs) {
try {
final boolean older = FileUtils.isFileOlder(file, now);
if (older && now - file.lastModified() > archiveExpiryDuration) {
createArchive(file);
}
} catch (final Exception e) {
throw new IllegalStateException(e);
}
}
}
}
}
private String formatFilename(final String pattern, final String date, final int index) {
return String.format(pattern, date, index);
}
private void createArchive(final File source) {
final File target = new File(archiveDir, source.getName() + "." + archiveFormat);
if (target.isFile()) {
return;
}
final File parentFile = target.getParentFile();
if (!parentFile.isDirectory() && !parentFile.mkdirs()) {
throw new IllegalStateException("Can't create " + parentFile.getAbsolutePath());
}
if (archiveFormat.equalsIgnoreCase("gzip")) {
OutputStream outputStream = null;
try {
outputStream = new BufferedOutputStream(new GZIPOutputStream(new FileOutputStream(target)));
final byte[] buffer = new byte[BUFFER_SIZE];
FileInputStream inputStream = null;
try {
inputStream = new FileInputStream(source);
copyStream(inputStream, outputStream, buffer);
} catch (final IOException e) {
throw new IllegalStateException(e);
} finally {
if (inputStream != null) {
try {
inputStream.close();
} catch (final IOException ioe) {
// no-op
}
}
}
} catch (final IOException e) {
throw new IllegalStateException(e);
} finally {
if (outputStream != null) {
try {
outputStream.close();
} catch (final IOException ioe) {
// no-op
}
}
}
} else { // consider file defines a zip whatever extension it is
ZipOutputStream outputStream = null;
try {
outputStream = new ZipOutputStream(new FileOutputStream(target));
outputStream.setLevel(compressionLevel);
final byte[] buffer = new byte[BUFFER_SIZE];
FileInputStream inputStream = null;
try {
inputStream = new FileInputStream(source);
final ZipEntry zipEntry = new ZipEntry(source.getName());
outputStream.putNextEntry(zipEntry);
copyStream(inputStream, outputStream, buffer);
} catch (final IOException e) {
throw new IllegalStateException(e);
} finally {
if (inputStream != null) {
try {
inputStream.close();
} catch (final IOException ioe) {
// no-op
}
}
}
} catch (final IOException e) {
throw new IllegalStateException(e);
} finally {
if (outputStream != null) {
try {
outputStream.close();
} catch (final IOException ioe) {
// no-op
}
}
}
}
try {
if (!FileUtils.deleteQuietly(source)) {
reportError("Can't delete " + source.getAbsolutePath() + ".", null, ErrorManager.GENERIC_FAILURE);
}
} catch (final Exception e) {
throw new IllegalStateException(e);
}
}
private static void copyStream(final InputStream inputStream, final OutputStream outputStream, final byte[] buffer) throws IOException {
int n;
while ((n = inputStream.read(buffer)) != -1) {
outputStream.write(buffer, 0, n);
}
}
protected String getProperty(final String name, final String defaultValue) {
String value = LogManager.getLogManager().getProperty(name);
if (value == null) {
value = defaultValue;
} else {
value = value.trim();
}
return value;
}
protected static String replace(final String str) { // [lang3] would be good but no dep for these classes is better
String result = str;
int start = str.indexOf("${");
if (start >= 0) {
final StringBuilder builder = new StringBuilder();
int end = -1;
while (start >= 0) {
builder.append(str, end + 1, start);
end = str.indexOf('}', start + 2);
if (end < 0) {
end = start - 1;
break;
}
final String propName = str.substring(start + 2, end);
String replacement = !propName.isEmpty() ? System.getProperty(propName) : null;
if (replacement == null) {
replacement = System.getenv(propName);
}
if (replacement != null) {
builder.append(replacement);
} else {
builder.append(str, start, end + 1);
}
start = str.indexOf("${", end + 1);
}
builder.append(str, end + 1, str.length());
result = builder.toString();
}
return result;
}
private final class CountingStream extends OutputStream {
private final OutputStream out;
private CountingStream(final OutputStream out) {
this.out = out;
written = 0;
}
@Override
public void write(final int b) throws IOException {
out.write(b);
written++;
}
@Override
public void write(final byte[] buff) throws IOException {
out.write(buff);
written += buff.length;
}
@Override
public void write(final byte[] buff, final int off, final int len) throws IOException {
out.write(buff, off, len);
written += len;
}
@Override
public void flush() throws IOException {
out.flush();
}
@Override
public void close() throws IOException {
out.close();
}
}
}
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