com.cisco.oss.foundation.logging.converters.FoundationLoggingHostPatternConverter Maven / Gradle / Ivy
/*
* Copyright 2015 Cisco Systems, Inc.
*
* 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 com.cisco.oss.foundation.logging.converters;
import org.apache.log4j.pattern.LoggingEventPatternConverter;
import org.apache.log4j.spi.LoggingEvent;
import java.net.InetAddress;
import java.net.UnknownHostException;
/**
* @author Yair Ogen
*
*/
public final class FoundationLoggingHostPatternConverter extends LoggingEventPatternConverter {
public static final String hostName = initLocalHost();
/**
* Private constructor.
*/
private FoundationLoggingHostPatternConverter() {
super("Host", "host");
}
private static String initLocalHost() {
try {
InetAddress addr = InetAddress.getLocalHost();
return addr.getHostName();
} catch (UnknownHostException e) {
throw new UnsupportedOperationException("Cannot resolve host name. Please check hosts file.", e);
}
}
/**
* Gets an instance of the class.
*
* @param options
* pattern options, may be null. If first element is "short", only the first line of the throwable will be formatted.
* @return instance of class.
*/
public static FoundationLoggingHostPatternConverter newInstance(final String[] options) {
return new FoundationLoggingHostPatternConverter();
}
/**
* {@inheritDoc}
*/
@Override
public void format(final LoggingEvent event, final StringBuffer toAppendTo) {
toAppendTo.append(hostName);
}
/**
* This converter obviously handles throwables.
*
* @return true.
*/
@Override
public boolean handlesThrowable() {
return false;
}
}