org.apache.hadoop.http.HttpRequestLog Maven / Gradle / Ivy
/**
* 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.hadoop.http;
import java.util.HashMap;
import org.apache.commons.logging.impl.Log4JLogger;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogConfigurationException;
import org.apache.commons.logging.LogFactory;
import org.apache.log4j.Appender;
import org.eclipse.jetty.server.AsyncRequestLogWriter;
import org.eclipse.jetty.server.CustomRequestLog;
import org.eclipse.jetty.server.RequestLog;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* RequestLog object for use with Http
*/
public class HttpRequestLog {
public static final Logger LOG =
LoggerFactory.getLogger(HttpRequestLog.class);
private static final HashMap serverToComponent;
static {
serverToComponent = new HashMap();
serverToComponent.put("cluster", "resourcemanager");
serverToComponent.put("hdfs", "namenode");
serverToComponent.put("node", "nodemanager");
}
public static RequestLog getRequestLog(String name) {
String lookup = serverToComponent.get(name);
if (lookup != null) {
name = lookup;
}
String loggerName = "http.requests." + name;
String appenderName = name + "requestlog";
Log logger = LogFactory.getLog(loggerName);
boolean isLog4JLogger;;
try {
isLog4JLogger = logger instanceof Log4JLogger;
} catch (NoClassDefFoundError err) {
// In some dependent projects, log4j may not even be on the classpath at
// runtime, in which case the above instanceof check will throw
// NoClassDefFoundError.
LOG.debug("Could not load Log4JLogger class", err);
isLog4JLogger = false;
}
if (isLog4JLogger) {
Log4JLogger httpLog4JLog = (Log4JLogger)logger;
org.apache.log4j.Logger httpLogger = httpLog4JLog.getLogger();
Appender appender = null;
try {
appender = httpLogger.getAppender(appenderName);
} catch (LogConfigurationException e) {
LOG.warn("Http request log for {} could not be created", loggerName);
throw e;
}
if (appender == null) {
LOG.info("Http request log for {} is not defined", loggerName);
return null;
}
if (appender instanceof HttpRequestLogAppender) {
HttpRequestLogAppender requestLogAppender
= (HttpRequestLogAppender)appender;
AsyncRequestLogWriter logWriter = new AsyncRequestLogWriter();
logWriter.setFilename(requestLogAppender.getFilename());
logWriter.setRetainDays(requestLogAppender.getRetainDays());
return new CustomRequestLog(logWriter,
CustomRequestLog.EXTENDED_NCSA_FORMAT);
} else {
LOG.warn("Jetty request log for {} was of the wrong class", loggerName);
return null;
}
} else {
LOG.warn("Jetty request log can only be enabled using Log4j");
return null;
}
}
}