/// <summary>
/// Runs expressions, and configures DotNetStarter's ILocator, but does not run IStartupModules
/// <para>IMPORTANT: Must run after all other configurations.</para>
/// </summary>
/// <param name="useApplicationContext">If false, the static ApplicationContext.Default will not be set nor will Import<T> work after execution. Default is true.</param>
/// <param name="useDiscoverableAssemblies">Ignored if assemblyexpression is used! Instructs default assembly loader to filter for assemblies with DiscoverableAssemblyAttribute</param>
/// <returns></returns>
public StartupBuilder Build(bool useApplicationContext = true, bool useDiscoverableAssemblies = false)
{
// order matters
_usingAppContext = useApplicationContext;
if (_isConfigured)
{
return(this);
}
_isConfigured = true;
if (_usingAppContext && ApplicationContext.Started)
{
return(this);
}
// end order matters
AddManualRegistrations();
var objFactory = new StartupBuilderObjectFactory()
{
Environment = _environment
};
var assemblyExp = new AssemblyExpression();
_assemblyExpression?.Invoke(assemblyExp);
objFactory.AssemblyExpression = assemblyExp;
var moduleExp = new StartupModulesExpression();
_moduleExpression?.Invoke(moduleExp);
moduleExp.Build();
objFactory.StartupModulesExpression = moduleExp;
var overrideExp = new DefaultsExpression();
_overrideExpression?.Invoke(overrideExp);
objFactory.OverrideExpression = overrideExp;
// if no assemblies have been configured follow the default scanner rule
// will throw exception for netstandard1.0 applications
var assembliesForStartup = GetDefaultAssemblies(useDiscoverableAssemblies, assemblyExp);
if (!useApplicationContext)
{
ExecuteBuild(objFactory, assembliesForStartup, overrideExp, false);
return(this);
}
// default way using the static startup
if (!ApplicationContext.Started)
{
if (_appStarting)
{
_appStarting = false; // for test purposes
throw new Exception($"Do not access {typeof(ApplicationContext).FullName}.{nameof(ApplicationContext.Default)} during startup!");
}
lock (_objLock)
{
if (!ApplicationContext.Started)
{
_appStarting = true;
ExecuteBuild(objFactory, assembliesForStartup, overrideExp, useApplicationContext);
ApplicationContext._Default = StartupContext;
_appStarting = false;
}
}
}
return(this);
}
private void ExecuteBuild(StartupBuilderObjectFactory objFactory, IEnumerable <Assembly> assemblies, DefaultsExpression defaults, bool enableImport)
{
var startupConfig = objFactory.CreateStartupConfiguration(assemblies);
IStartupHandler localStartupHandlerFactory(IStartupConfiguration config) =>
new StartupHandler(objFactory.CreateTimedTask, objFactory.CreateRegistryFactory(config), objFactory.CreateContainerDefaults(), objFactory.GetRegistryFinalizer(), enableImport: enableImport);
_startupHandler = (defaults.StartupHandlerFactory ?? localStartupHandlerFactory)?.Invoke(startupConfig);
StartupContext = _startupHandler?.ConfigureLocator(startupConfig);
}
