org.springframework.yarn.event.LoggingListener Maven / Gradle / Ivy
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/*
* Copyright 2013 the original author or authors.
*
* Licensed 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.springframework.yarn.event;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.context.ApplicationListener;
import org.springframework.util.StringUtils;
/**
* Simple {@link ApplicationListener} which logs all events
* based on {@link AbstractYarnEvent} using a log level
* set during the construction.
*
* @author Janne Valkealahti
*
*/
public class LoggingListener implements ApplicationListener {
private static final Log log = LogFactory.getLog(LoggingListener.class);
/** Internal enums to match the log level */
private static enum Level {
FATAL, ERROR, WARN, INFO, DEBUG, TRACE
}
/** Level to use */
private final Level level;
/**
* Constructs Logger listener with debug level.
*/
public LoggingListener() {
level = Level.DEBUG;
}
/**
* Constructs Logger listener with given level.
*
* @param level the level string
*/
public LoggingListener(String level) {
try {
this.level = Level.valueOf(level.toUpperCase());
}
catch (IllegalArgumentException e) {
throw new IllegalArgumentException("Invalid log level '" + level
+ "'. The (case-insensitive) supported values are: "
+ StringUtils.arrayToCommaDelimitedString(Level.values()));
}
}
@Override
public void onApplicationEvent(AbstractYarnEvent event) {
switch (this.level) {
case FATAL:
if (log.isFatalEnabled()) {
log.fatal(event);
}
break;
case ERROR:
if (log.isErrorEnabled()) {
log.error(event);
}
break;
case WARN:
if (log.isWarnEnabled()) {
log.warn(event);
}
break;
case INFO:
if (log.isInfoEnabled()) {
log.info(event);
}
break;
case DEBUG:
if (log.isDebugEnabled()) {
log.debug(event);
}
break;
case TRACE:
if (log.isTraceEnabled()) {
log.trace(event);
}
break;
}
}
}