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//******************************************************************************************************//  LogFileCompactor.cs - Gbtc////  Copyright © 2016, Grid Protection Alliance.  All Rights Reserved.////  Licensed to the Grid Protection Alliance (GPA) under one or more contributor license agreements. See//  the NOTICE file distributed with this work for additional information regarding copyright ownership.//  The GPA licenses this file to you under the Eclipse Public License -v 1.0 (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.opensource.org/licenses/eclipse-1.0.php////  Unless agreed to in writing, the subject software distributed under the License is distributed on an//  "AS-IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. Refer to the//  License for the specific language governing permissions and limitations.////  Code Modification History://  ----------------------------------------------------------------------------------------------------//  10/24/2016 - Steven E. Chisholm//       Generated original version of source code. //       ////****************************************************************************************************** using System;using System.Collections.Generic;using System.IO;using GSF.IO;using Ionic.Zlib; namespace GSF.Diagnostics{    /// <summary>    /// A method to read all of the logs in a single file.    /// </summary>    public static class LogFileCompactor    {        /// <summary>        /// Reads all log messages from the supplied file.        /// </summary>        public static void Compact(ICollection<string> inputFileNames, string outputFileName)        {            LogCollection logs = new LogCollection();             foreach (var file in inputFileNames)            {                using (var stream = new FileStream(file, FileMode.Open, FileAccess.Read, FileShare.Read))                {                    if (stream.ReadBoolean())                    {                        //Wrong File Version                        break;                    }                    if (stream.ReadNextByte() != 1)                    {                        //Wrong File Version                        break;                    }                    using (var zipStream = new DeflateStream(stream, CompressionMode.Decompress, true))                    using (var bs = new BufferedStream(zipStream, 8192))                    {                        while (bs.ReadBoolean())                        {                            var message = new LogMessage(bs);                            logs.Pass1(message);                        }                    }                }            }             logs.Compact();            foreach (var file in inputFileNames)            {                using (var stream = new FileStream(file, FileMode.Open, FileAccess.Read, FileShare.Read))                {                    if (stream.ReadBoolean())                    {                        //Wrong File Version                        break;                    }                    if (stream.ReadNextByte() != 1)                    {                        //Wrong File Version                        break;                    }                    using (var zipStream = new DeflateStream(stream, CompressionMode.Decompress, true))                    using (var bs = new BufferedStream(zipStream, 8192))                    {                        while (bs.ReadBoolean())                        {                            var message = new LogMessage(bs);                            logs.Pass2(message);                        }                    }                }            }            logs.Save(outputFileName);        }         private class LogCollection        {            private Dictionary<LogEventPublisherDetails, MessageByOwner> m_owners;             public LogCollection()            {                m_owners = new Dictionary<LogEventPublisherDetails, MessageByOwner>();            }             public void Pass1(LogMessage message)            {                MessageByOwner m;                if (!m_owners.TryGetValue(message.EventPublisherDetails, out m))                {                    m = new MessageByOwner(message.EventPublisherDetails);                    m_owners.Add(message.EventPublisherDetails, m);                }                m.Pass1(message);            }             public void Compact()            {             }             public void Pass2(LogMessage message)            {                m_owners[message.EventPublisherDetails].Pass2(message);            }             public void Save(string outputFileName)            {                using (var fileWriter = new LogFileWriter(outputFileName))                {                    foreach (var owner in m_owners.Values)                    {                        owner.Save(fileWriter);                    }                }            }        }         private class MessageByOwner        {            private int m_index;            public List<MessageData> AllMessages;            public LogEventPublisherDetails Owner;             public int KeepWeight = 0;             public MessageByOwner(LogEventPublisherDetails owner)            {                m_index = 0;                Owner = owner;                AllMessages = new List<MessageData>();            }             public void Pass1(LogMessage message)            {                AllMessages.Add(new MessageData(message));            }             public void Pass2(LogMessage message)            {                AllMessages[m_index].Assign(message, KeepWeight);                m_index++;            }              public void Save(LogFileWriter fileWriter)            {                foreach (var message in AllMessages)                {                    if (message.Message != null)                    {                        fileWriter.Write(message.Message);                    }                }            }        }         private class MessageData        {            public MessageClass Classification;            public MessageLevel Level;            public int KeepWeighting;            public DateTime UtcDateTime;            public LogMessage Message;             public MessageData(LogMessage message)            {                Classification = message.Classification;                Level = message.Level;                KeepWeighting = 0;                UtcDateTime = message.UtcTime;                message = null;            }             public void Assign(LogMessage message, int keepWeight)            {                if (Classification != message.Classification || Level != message.Level || UtcDateTime != message.UtcTime)                    throw new Exception("Parsing Exception");                 if (KeepWeighting >= keepWeight)                {                    Message = message;                }            }        }     }}

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