#region Copyright & License
//
// Copyright 2001-2005 The Apache Software Foundation
//
// Licensed 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
namespace ConsoleApp{
using System;
/// <summary>
/// Illustrates using log4net to conditionally log events, and
/// using log4net to log exceptions, ...
/// </summary>
public class LoggingExample
{
// Create a logger for use in this class
private static readonly log4net.ILog log = log4net.LogManager.GetLogger(typeof(LoggingExample));
/// <summary>
/// Logs events.
/// </summary>
public static void LogEvents()
{
// Log a debug message. Test if debug is enabled before
// attempting to log the message. This is not required but
// can make running without logging faster.
if (log.IsDebugEnabled) log.Debug("This is a debug message");
try
{
Bar();
}
catch(Exception ex)
{
// Log an error with an exception
log.Error("Exception thrown from method Bar", ex);
}
log.Error("Hey this is an error!");
// Push a message on to the Nested Diagnostic Context stack
using(log4net.NDC.Push("NDC_Message"))
{
log.Warn("This should have an NDC message");
// Set a Mapped Diagnostic Context value
log4net.MDC.Set("auth", "auth-none");
log.Warn("This should have an MDC message for the key 'auth'");
} // The NDC message is popped off the stack at the end of the using {} block
log.Warn("See the NDC has been popped of! The MDC 'auth' key is still with us.");
}
// Helper methods to demonstrate location information and nested exceptions
private static void Bar()
{
Goo();
}
private static void Foo()
{
throw new Exception("This is an Exception");
}
private static void Goo()
{
try
{
Foo();
}
catch(Exception ex)
{
throw new ArithmeticException("Failed in Goo. Calling Foo. Inner Exception provided", ex);
}
}
}
}
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