snugs
104 lines
3.5 KiB
C#
104 lines
3.5 KiB
C#
/*
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* QUANTCONNECT.COM - Democratizing Finance, Empowering Individuals.
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* Lean Algorithmic Trading Engine v2.0. Copyright 2014 QuantConnect Corporation.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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using System;
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using System.IO;
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namespace QuantConnect.Logging
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{
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/// <summary>
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/// Provides an implementation of <see cref="ILogHandler"/> that writes all log messages to a file on disk.
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/// </summary>
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public class FileLogHandler : ILogHandler
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{
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// we need to control synchronization to our stream writer since it's not inherently thread-safe
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private readonly object _lock = new object();
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private readonly Lazy<TextWriter> _writer;
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/// <summary>
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/// Initializes a new instance of the <see cref="FileLogHandler"/> class to write messages to the specified file path.
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/// The file will be opened using <see cref="FileMode.Append"/>
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/// </summary>
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/// <param name="filepath">The file path use to save the log messages</param>
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public FileLogHandler(string filepath)
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{
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_writer = new Lazy<TextWriter>(
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() => new StreamWriter(File.Open(filepath, FileMode.Append, FileAccess.Write, FileShare.Read))
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);
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}
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/// <summary>
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/// Initializes a new instance of the <see cref="FileLogHandler"/> class using 'log.txt' for the filepath.
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/// </summary>
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public FileLogHandler()
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: this("log.txt")
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{
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}
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/// <summary>
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/// Write error message to log
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/// </summary>
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/// <param name="text">The error text to log</param>
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public void Error(string text)
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{
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WriteMessage(text, "ERROR");
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}
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/// <summary>
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/// Write debug message to log
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/// </summary>
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/// <param name="text">The debug text to log</param>
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public void Debug(string text)
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{
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WriteMessage(text, "DEBUG");
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}
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/// <summary>
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/// Write debug message to log
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/// </summary>
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/// <param name="text">The trace text to log</param>
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public void Trace(string text)
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{
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WriteMessage(text, "TRACE");
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}
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/// <summary>
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/// Performs application-defined tasks associated with freeing, releasing, or resetting unmanaged resources.
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/// </summary>
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/// <filterpriority>2</filterpriority>
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public void Dispose()
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{
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lock (_lock)
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{
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if (_writer.IsValueCreated)
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{
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_writer.Value.Dispose();
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}
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}
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}
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/// <summary>
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/// Writes the message to the writer
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/// </summary>
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private void WriteMessage(string text, string level)
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{
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lock (_lock)
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{
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_writer.Value.WriteLine("{0} {1}:: {2}", DateTime.UtcNow.ToString("o"), level, text);
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_writer.Value.Flush();
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}
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}
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}
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}
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