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#region Copyright notice and license
// Copyright 2015-2016, Google Inc.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#endregion
using System;
using System.Collections.Generic;
using System.Globalization;
namespace Grpc.Core.Logging
{
/// <summary>Logger that logs to System.Console.</summary>
public class ConsoleLogger : ILogger
{
// Format similar enough to C core log format except nanosecond precision is not supported.
const string DateTimeFormatString = "MMdd HH:mm:ss.ffffff";
readonly Type forType;
readonly string forTypeString;
/// <summary>Creates a console logger not associated to any specific type.</summary>
public ConsoleLogger() : this(null)
{
}
/// <summary>Creates a console logger that logs messsage specific for given type.</summary>
private ConsoleLogger(Type forType)
{
this.forType = forType;
if (forType != null)
{
var namespaceStr = forType.Namespace ?? "";
if (namespaceStr.Length > 0)
{
namespaceStr += ".";
}
this.forTypeString = namespaceStr + forType.Name + " ";
}
else
{
this.forTypeString = "";
}
}
/// <summary>
/// Returns a logger associated with the specified type.
/// </summary>
public ILogger ForType<T>()
{
if (typeof(T) == forType)
{
return this;
}
return new ConsoleLogger(typeof(T));
}
/// <summary>Logs a message with severity Debug.</summary>
public void Debug(string message)
{
Log("D", message);
}
/// <summary>Logs a formatted message with severity Debug.</summary>
public void Debug(string format, params object[] formatArgs)
{
Debug(string.Format(format, formatArgs));
}
/// <summary>Logs a message with severity Info.</summary>
public void Info(string message)
{
Log("I", message);
}
/// <summary>Logs a formatted message with severity Info.</summary>
public void Info(string format, params object[] formatArgs)
{
Info(string.Format(format, formatArgs));
}
/// <summary>Logs a message with severity Warning.</summary>
public void Warning(string message)
{
Log("W", message);
}
/// <summary>Logs a formatted message with severity Warning.</summary>
public void Warning(string format, params object[] formatArgs)
{
Warning(string.Format(format, formatArgs));
}
/// <summary>Logs a message and an associated exception with severity Warning.</summary>
public void Warning(Exception exception, string message)
{
Warning(message + " " + exception);
}
/// <summary>Logs a message with severity Error.</summary>
public void Error(string message)
{
Log("E", message);
}
/// <summary>Logs a formatted message with severity Error.</summary>
public void Error(string format, params object[] formatArgs)
{
Error(string.Format(format, formatArgs));
}
/// <summary>Logs a message and an associated exception with severity Error.</summary>
public void Error(Exception exception, string message)
{
Error(message + " " + exception);
}
private void Log(string severityString, string message)
{
Console.Error.WriteLine("{0}{1} {2}{3}",
severityString,
DateTime.Now.ToString(DateTimeFormatString, CultureInfo.InvariantCulture),
forTypeString,
message);
}
}
}
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