| #region Apache License |
| // |
| // 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. |
| // |
| #endregion |
| |
| using System; |
| using System.Text; |
| using System.IO; |
| |
| using log4net.Core; |
| |
| namespace log4net.Layout.Pattern |
| { |
| /// <summary> |
| /// Converter to output the relative time of the event |
| /// </summary> |
| /// <remarks> |
| /// <para> |
| /// Converter to output the time of the event relative to the start of the program. |
| /// </para> |
| /// </remarks> |
| /// <author>Nicko Cadell</author> |
| internal sealed class RelativeTimePatternConverter : PatternLayoutConverter |
| { |
| /// <summary> |
| /// Write the relative time to the output |
| /// </summary> |
| /// <param name="writer"><see cref="TextWriter" /> that will receive the formatted result.</param> |
| /// <param name="loggingEvent">the event being logged</param> |
| /// <remarks> |
| /// <para> |
| /// Writes out the relative time of the event in milliseconds. |
| /// That is the number of milliseconds between the event <see cref="LoggingEvent.TimeStamp"/> |
| /// and the <see cref="LoggingEvent.StartTime"/>. |
| /// </para> |
| /// </remarks> |
| override protected void Convert(TextWriter writer, LoggingEvent loggingEvent) |
| { |
| writer.Write( TimeDifferenceInMillis(LoggingEvent.StartTimeUtc, loggingEvent.TimeStampUtc).ToString(System.Globalization.NumberFormatInfo.InvariantInfo) ); |
| } |
| |
| /// <summary> |
| /// Helper method to get the time difference between two DateTime objects |
| /// </summary> |
| /// <param name="start">start time (in the current local time zone)</param> |
| /// <param name="end">end time (in the current local time zone)</param> |
| /// <returns>the time difference in milliseconds</returns> |
| private static long TimeDifferenceInMillis(DateTime start, DateTime end) |
| { |
| // We must convert all times to UTC before performing any mathematical |
| // operations on them. This allows use to take into account discontinuities |
| // caused by daylight savings time transitions. |
| return (long)(end.ToUniversalTime() - start.ToUniversalTime()).TotalMilliseconds; |
| } |
| } |
| } |