org.apache.log4j.helpers.RelativeTimeDateFormat 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.log4j.helpers;
import java.text.DateFormat;
import java.text.FieldPosition;
import java.text.ParsePosition;
import java.util.Date;
/**
* Formats a {@link Date} by printing the number of milliseconds elapsed since construction of the format. This is the
* fastest printing DateFormat in the package.
*
* @since 0.7.5
*/
public class RelativeTimeDateFormat extends DateFormat {
private static final long serialVersionUID = 7055751607085611984L;
protected final long startTime;
public RelativeTimeDateFormat() {
this.startTime = System.currentTimeMillis();
}
/**
* Appends to sbuf the number of milliseconds elapsed since the start of the application.
*
* @since 0.7.5
*/
@Override
public StringBuffer format(final Date date, final StringBuffer sbuf, final FieldPosition fieldPosition) {
// System.err.println(":"+ date.getTime() + " - " + startTime);
return sbuf.append((date.getTime() - startTime));
}
/**
* Always returns null.
*/
@Override
public Date parse(final String s, final ParsePosition pos) {
return null;
}
}