public static int Main(string[] args)
{
// The library we want to run was built and copied to the ApplicationFiles subdirectory
// Create an AppDomain with that directory as the appBasePath
var entryDirectory = Directory.GetParent(Assembly.GetEntryAssembly().Location);
var applicationFilesDirectory = Path.Combine(entryDirectory.FullName, "ApplicationFiles");
var applicationAppDomain = AppDomain.CreateDomain("ApplicationAppDomain", null, applicationFilesDirectory, applicationFilesDirectory, false);
try
{
// Test that when transition back to this AppDomain, there are no serialization problems
// This would happen if any values were stored in data slots
Console.WriteLine("Calling the ApplicationWithLog4Net.Program in a separate AppDomain");
AppDomainProxy.Call(applicationAppDomain, "ApplicationWithLog4Net", "ApplicationWithLog4Net.Program", "Invoke", null);
AppDomain.Unload(applicationAppDomain);
}
catch (Exception ex)
{
Console.Error.WriteLine(ex);
return((int)ExitCode.UnknownError);
}
#if NETCOREAPP2_1
// Add a delay to avoid a race condition on shutdown: https://github.com/dotnet/coreclr/pull/22712
// This would cause a segmentation fault on .net core 2.x
System.Threading.Thread.Sleep(5000);
#endif
return((int)ExitCode.Success);
}
public static int RunLoggingProcedure(Action <string> logAction)
{
#if NETFRAMEWORK
// Set up the secondary AppDomain first
// The plugin application we'll call was built and copied to the ApplicationFiles subdirectory
// Create an AppDomain with that directory as the appBasePath
var entryDirectory = Directory.GetParent(Assembly.GetEntryAssembly().Location);
var applicationFilesDirectory = Path.Combine(entryDirectory.FullName, "ApplicationFiles");
var applicationAppDomain = AppDomain.CreateDomain("ApplicationAppDomain", null, applicationFilesDirectory, applicationFilesDirectory, false);
#endif
// Set up Tracer and start a trace
// Do not explicitly set LogsInjectionEnabled = true, use DD_LOGS_INJECTION environment variable to enable
var settings = TracerSettings.FromDefaultSources();
settings.Environment ??= "dev"; // Ensure that we have an env value. In CI, this will automatically be assigned. Later we can test that everything is fine when Environment=null
settings.ServiceVersion ??= "1.0.0"; // Ensure that we have an env value. In CI, this will automatically be assigned. Later we can test that everything is fine when when ServiceVersion=null
Tracer.Configure(settings);
try
{
logAction($"{ExcludeMessagePrefix}Entering Datadog scope.");
using (var scope = Tracer.Instance.StartActive("transaction"))
{
// In the middle of the trace, make a call across AppDomains
// Unless handled properly, this can cause the following error due
// to the way log4net stores "AsyncLocal" state in the
// System.Runtime.Remoting.Messaging.CallContext:
// System.Runtime.Serialization.SerializationException: Type is not resolved for member 'log4net.Util.PropertiesDictionary,log4net, Version=2.0.12.0, Culture=neutral, PublicKeyToken=669e0ddf0bb1aa2a'.
#if NETFRAMEWORK
logAction("Calling the PluginApplication.Program in a separate AppDomain");
AppDomainProxy.Call(applicationAppDomain, "PluginApplication", "PluginApplication.Program", "Invoke", null);
#else
logAction("Skipping the cross-AppDomain call on .NET Core");
#endif
}
logAction($"{ExcludeMessagePrefix}Exited Datadog scope.");
#if NETFRAMEWORK
AppDomain.Unload(applicationAppDomain);
#endif
}
catch (Exception ex)
{
Console.Error.WriteLine(ex);
return((int)ExitCode.UnknownError);
}
#if NETCOREAPP2_1
// Add a delay to avoid a race condition on shutdown: https://github.com/dotnet/coreclr/pull/22712
// This would cause a segmentation fault on .net core 2.x
System.Threading.Thread.Sleep(5000);
#endif
return((int)ExitCode.Success);
}