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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.logging.log4j.core.appender;
import java.io.Serializable;
import java.util.HashMap;
import java.util.Map;
import java.util.zip.Deflater;
import org.apache.logging.log4j.core.Filter;
import org.apache.logging.log4j.core.Layout;
import org.apache.logging.log4j.core.LogEvent;
import org.apache.logging.log4j.core.appender.rolling.DefaultRolloverStrategy;
import org.apache.logging.log4j.core.appender.rolling.RollingRandomAccessFileManager;
import org.apache.logging.log4j.core.appender.rolling.RolloverStrategy;
import org.apache.logging.log4j.core.appender.rolling.TriggeringPolicy;
import org.apache.logging.log4j.core.config.Configuration;
import org.apache.logging.log4j.core.config.plugins.Plugin;
import org.apache.logging.log4j.core.config.plugins.PluginAttribute;
import org.apache.logging.log4j.core.config.plugins.PluginConfiguration;
import org.apache.logging.log4j.core.config.plugins.PluginElement;
import org.apache.logging.log4j.core.config.plugins.PluginFactory;
import org.apache.logging.log4j.core.layout.PatternLayout;
import org.apache.logging.log4j.core.net.Advertiser;
import org.apache.logging.log4j.core.util.Booleans;
import org.apache.logging.log4j.core.util.Integers;
/**
* An appender that writes to random access files and can roll over at
* intervals.
*/
@Plugin(name = "RollingRandomAccessFile", category = "Core", elementType = "appender", printObject = true)
public final class RollingRandomAccessFileAppender extends AbstractOutputStreamAppender {
private final String fileName;
private final String filePattern;
private final Object advertisement;
private final Advertiser advertiser;
private RollingRandomAccessFileAppender(final String name, final Layout layout,
final Filter filter, final RollingRandomAccessFileManager manager, final String fileName,
final String filePattern, final boolean ignoreExceptions,
final boolean immediateFlush, final int bufferSize, final Advertiser advertiser) {
super(name, layout, filter, ignoreExceptions, immediateFlush, manager);
if (advertiser != null) {
final Map configuration = new HashMap<>(layout.getContentFormat());
configuration.put("contentType", layout.getContentType());
configuration.put("name", name);
advertisement = advertiser.advertise(configuration);
} else {
advertisement = null;
}
this.fileName = fileName;
this.filePattern = filePattern;
this.advertiser = advertiser;
}
@Override
public void stop() {
super.stop();
if (advertiser != null) {
advertiser.unadvertise(advertisement);
}
}
/**
* Write the log entry rolling over the file when required.
*
* @param event The LogEvent.
*/
@Override
public void append(final LogEvent event) {
final RollingRandomAccessFileManager manager = getManager();
manager.checkRollover(event);
// Leverage the nice batching behaviour of async Loggers/Appenders:
// we can signal the file manager that it needs to flush the buffer
// to disk at the end of a batch.
// From a user's point of view, this means that all log events are
// _always_ available in the log file, without incurring the overhead
// of immediateFlush=true.
manager.setEndOfBatch(event.isEndOfBatch()); // FIXME manager's EndOfBatch threadlocal can be deleted
// LOG4J2-1292 utilize gc-free Layout.encode() method: taken care of in superclass
super.append(event);
}
/**
* Returns the File name for the Appender.
*
* @return The file name.
*/
public String getFileName() {
return fileName;
}
/**
* Returns the file pattern used when rolling over.
*
* @return The file pattern.
*/
public String getFilePattern() {
return filePattern;
}
/**
* Returns the size of the file manager's buffer.
* @return the buffer size
*/
public int getBufferSize() {
return getManager().getBufferSize();
}
/**
* Create a RollingRandomAccessFileAppender.
*
* @param fileName The name of the file that is actively written to.
* (required).
* @param filePattern The pattern of the file name to use on rollover.
* (required).
* @param append If true, events are appended to the file. If false, the
* file is overwritten when opened. Defaults to "true"
* @param name The name of the Appender (required).
* @param immediateFlush When true, events are immediately flushed. Defaults
* to "true".
* @param bufferSizeStr The buffer size, defaults to {@value RollingRandomAccessFileManager#DEFAULT_BUFFER_SIZE}.
* @param policy The triggering policy. (required).
* @param strategy The rollover strategy. Defaults to
* DefaultRolloverStrategy.
* @param layout The layout to use (defaults to the default PatternLayout).
* @param filter The Filter or null.
* @param ignore If {@code "true"} (default) exceptions encountered when appending events are logged; otherwise
* they are propagated to the caller.
* @param advertise "true" if the appender configuration should be
* advertised, "false" otherwise.
* @param advertiseURI The advertised URI which can be used to retrieve the
* file contents.
* @param config The Configuration.
* @return A RollingRandomAccessFileAppender.
*/
@PluginFactory
public static RollingRandomAccessFileAppender createAppender(
@PluginAttribute("fileName") final String fileName,
@PluginAttribute("filePattern") final String filePattern,
@PluginAttribute("append") final String append,
@PluginAttribute("name") final String name,
@PluginAttribute("immediateFlush") final String immediateFlush,
@PluginAttribute("bufferSize") final String bufferSizeStr,
@PluginElement("Policy") final TriggeringPolicy policy,
@PluginElement("Strategy") RolloverStrategy strategy,
@PluginElement("Layout") Layout layout,
@PluginElement("Filter") final Filter filter,
@PluginAttribute("ignoreExceptions") final String ignore,
@PluginAttribute("advertise") final String advertise,
@PluginAttribute("advertiseURI") final String advertiseURI,
@PluginConfiguration final Configuration config) {
final boolean isAppend = Booleans.parseBoolean(append, true);
final boolean ignoreExceptions = Booleans.parseBoolean(ignore, true);
final boolean isFlush = Booleans.parseBoolean(immediateFlush, true);
final boolean isAdvertise = Boolean.parseBoolean(advertise);
final int bufferSize = Integers.parseInt(bufferSizeStr, RollingRandomAccessFileManager.DEFAULT_BUFFER_SIZE);
if (name == null) {
LOGGER.error("No name provided for FileAppender");
return null;
}
if (fileName == null) {
LOGGER.error("No filename was provided for FileAppender with name " + name);
return null;
}
if (filePattern == null) {
LOGGER.error("No filename pattern provided for FileAppender with name " + name);
return null;
}
if (policy == null) {
LOGGER.error("A TriggeringPolicy must be provided");
return null;
}
if (strategy == null) {
strategy = DefaultRolloverStrategy.createStrategy(null, null, null,
String.valueOf(Deflater.DEFAULT_COMPRESSION), null, true, config);
}
if (layout == null) {
layout = PatternLayout.createDefaultLayout();
}
final RollingRandomAccessFileManager manager = RollingRandomAccessFileManager.getRollingRandomAccessFileManager(
fileName, filePattern, isAppend, isFlush, bufferSize, policy, strategy, advertiseURI, layout);
if (manager == null) {
return null;
}
return new RollingRandomAccessFileAppender(name, layout, filter, manager,
fileName, filePattern, ignoreExceptions, isFlush, bufferSize,
isAdvertise ? config.getAdvertiser() : null);
}
}