/*
* 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.RollingFileManager;
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.helpers.Booleans;
import org.apache.logging.log4j.core.layout.PatternLayout;
import org.apache.logging.log4j.core.net.Advertiser;
/**
* An appender that writes to files and can roll over at intervals.
*/
@Plugin(name = "RollingFile", category = "Core", elementType = "appender", printObject = true)
public final class RollingFileAppender extends AbstractOutputStreamAppender<RollingFileManager> {
private final String fileName;
private final String filePattern;
private Object advertisement;
private final Advertiser advertiser;
private RollingFileAppender(final String name, final Layout<? extends Serializable> layout, final Filter filter,
final RollingFileManager manager, final String fileName,
final String filePattern, final boolean ignoreExceptions, final boolean immediateFlush,
final Advertiser advertiser) {
super(name, layout, filter, ignoreExceptions, immediateFlush, manager);
if (advertiser != null) {
final Map<String, String> configuration = new HashMap<String, String>(layout.getContentFormat());
configuration.put("contentType", layout.getContentType());
configuration.put("name", name);
advertisement = advertiser.advertise(configuration);
}
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) {
getManager().checkRollover(event);
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;
}
/**
* Create a RollingFileAppender.
* @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 bufferedIO When true, I/O will be buffered. Defaults to "true".
* @param immediateFlush When true, events are immediately flushed. Defaults to "true".
* @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 RollingFileAppender.
*/
@PluginFactory
public static RollingFileAppender createAppender(
@PluginAttribute("fileName") final String fileName,
@PluginAttribute("filePattern") final String filePattern,
@PluginAttribute("append") final String append,
@PluginAttribute("name") final String name,
@PluginAttribute("bufferedIO") final String bufferedIO,
@PluginAttribute("immediateFlush") final String immediateFlush,
@PluginElement("Policy") final TriggeringPolicy policy,
@PluginElement("Strategy") RolloverStrategy strategy,
@PluginElement("Layout") Layout<? extends Serializable> 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 isBuffered = Booleans.parseBoolean(bufferedIO, true);
final boolean isFlush = Booleans.parseBoolean(immediateFlush, true);
final boolean isAdvertise = Boolean.parseBoolean(advertise);
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), config);
}
if (layout == null) {
layout = PatternLayout.createLayout(null, null, null, null, null, null);
}
final RollingFileManager manager = RollingFileManager.getFileManager(fileName, filePattern, isAppend,
isBuffered, policy, strategy, advertiseURI, layout);
if (manager == null) {
return null;
}
return new RollingFileAppender(name, layout, filter, manager, fileName, filePattern,
ignoreExceptions, isFlush, isAdvertise ? config.getAdvertiser() : null);
}
}