private bool StartSnoopInstance(string settingsFile)
{
Trace.WriteLine("Starting snoop...");
var settingsData = TransientSettingsData.LoadCurrent(settingsFile);
IList <AppDomain>?appDomains = null;
if (settingsData.MultipleAppDomainMode != MultipleAppDomainMode.NeverUse)
{
appDomains = new AppDomainHelper().GetAppDomains();
}
var numberOfAppDomains = appDomains?.Count ?? 1;
var succeeded = false;
if (numberOfAppDomains < 1)
{
Trace.WriteLine("Snoop wasn't able to enumerate app domains or MultipleAppDomainMode was disabled. Trying to run in single app domain mode.");
succeeded = this.RunInCurrentAppDomain(settingsData);
}
else if (numberOfAppDomains == 1)
{
Trace.WriteLine("Only found one app domain. Running in single app domain mode.");
succeeded = this.RunInCurrentAppDomain(settingsData);
}
else
{
Trace.WriteLine($"Found {numberOfAppDomains} app domains. Running in multiple app domain mode.");
var shouldUseMultipleAppDomainMode = settingsData.MultipleAppDomainMode == MultipleAppDomainMode.Ask ||
settingsData.MultipleAppDomainMode == MultipleAppDomainMode.AlwaysUse;
if (settingsData.MultipleAppDomainMode == MultipleAppDomainMode.Ask)
{
var result =
MessageBox.Show(
"Snoop has noticed multiple app domains.\n\n" +
"Would you like to enter multiple app domain mode, and have a separate Snoop window for each app domain?\n\n" +
"Without having a separate Snoop window for each app domain, you will not be able to Snoop the windows in the app domains outside of the main app domain.",
"Enter Multiple AppDomain Mode",
MessageBoxButton.YesNo,
MessageBoxImage.Question,
MessageBoxResult.No);
if (result != MessageBoxResult.Yes)
{
shouldUseMultipleAppDomainMode = false;
}
}
if (shouldUseMultipleAppDomainMode == false ||
appDomains is null)
{
succeeded = this.RunInCurrentAppDomain(settingsData);
}
else
{
SnoopModes.MultipleAppDomainMode = true;
// Use environment variable to transport snoop settings file accross multiple app domains
Environment.SetEnvironmentVariable("Snoop.SettingsFile", settingsFile, EnvironmentVariableTarget.Process);
var assemblyFullName = typeof(SnoopManager).Assembly.Location;
var fullInjectorClassName = typeof(SnoopCrossAppDomainInjector).FullName;
foreach (var appDomain in appDomains)
{
Trace.WriteLine($"Trying to create Snoop instance in app domain \"{appDomain.FriendlyName}\"...");
try
{
AttachAssemblyResolveHandler(appDomain);
// the injection code runs inside the constructor of SnoopCrossAppDomainManager
appDomain.CreateInstanceFrom(assemblyFullName, fullInjectorClassName !);
// if there is no exception we consider the injection successful
var appDomainSucceeded = true;
succeeded = succeeded || appDomainSucceeded;
Trace.WriteLine($"Successfully created Snoop instance in app domain \"{appDomain.FriendlyName}\".");
}
catch (Exception exception)
{
Trace.WriteLine($"Failed to create Snoop instance in app domain \"{appDomain.FriendlyName}\".");
Trace.WriteLine(exception);
}
}
}
}
if (succeeded == false)
{
MessageBox.Show("Can't find a current application or a PresentationSource root visual.",
"Can't Snoop",
MessageBoxButton.OK,
MessageBoxImage.Exclamation);
}
return(succeeded);
}
public virtual void AutoRegisterTypes(bool typesWithCustomRegistrationFuncToo)
{
IList <Type> typesFound = AppDomainHelper.GetTypesMarkedWithAttribute(typeof(DIContainerAutoRegisterableTypeAttribute), assemblySelector, (a, t) => true);
AutoRegisterTypesInternal(typesWithCustomRegistrationFuncToo, typesFound);
}
