/**
* 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.apache.log4j.Logger;
import org.mortbay.jetty.NCSARequestLog;
import org.mortbay.jetty.RequestLog;
/**
* RequestLog object for use with Http
*/
public class HttpRequestLog {
public static final Log LOG = LogFactory.getLog(HttpRequestLog.class);
private static final HashMap<String, String> serverToComponent;
static {
serverToComponent = new HashMap<String, String>();
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);
if (logger instanceof Log4JLogger) {
Log4JLogger httpLog4JLog = (Log4JLogger)logger;
Logger httpLogger = httpLog4JLog.getLogger();
Appender appender = null;
try {
appender = httpLogger.getAppender(appenderName);
} catch (LogConfigurationException e) {
LOG.warn("Http request log for " + loggerName
+ " could not be created");
throw e;
}
if (appender == null) {
LOG.info("Http request log for " + loggerName
+ " is not defined");
return null;
}
if (appender instanceof HttpRequestLogAppender) {
HttpRequestLogAppender requestLogAppender
= (HttpRequestLogAppender)appender;
NCSARequestLog requestLog = new NCSARequestLog();
requestLog.setFilename(requestLogAppender.getFilename());
requestLog.setRetainDays(requestLogAppender.getRetainDays());
return requestLog;
}
else {
LOG.warn("Jetty request log for " + loggerName
+ " was of the wrong class");
return null;
}
}
else {
LOG.warn("Jetty request log can only be enabled using Log4j");
return null;
}
}
}