public async Task Run(Func <IWorkContextScope, Task> process, string shellName)
{
var shellContext = _hostContainer.Resolve <IOrchardHost>().GetShellContext(new ShellSettings {
Name = shellName
});
// We need a single HCA, and thus the same HttpContext throughout this scope to carry the work context. Especially
// important for async code, see: https://github.com/OrchardCMS/Orchard/issues/4338
// Using InstancePerLifetimeScope() inside the shell ContinerBuilder still yields multiple instantiations.
var hca = new AppHostHttpContextAccessor();
using (var scope = shellContext.LifetimeScope.BeginLifetimeScope(
RunScopeTag,
builder =>
{
builder.RegisterInstance(hca).As <IHttpContextAccessor>();
// Needed so it gets the AppHostHttpContextAccessor instance registered in Run().
builder.RegisterType <WorkContextAccessor>().As <IWorkContextAccessor>().SingleInstance();
builder.RegisterType <ProcessingEngineTaskAddedHandler>()
.As <IProcessingEngine>()
.As <IProcessingEngineTaskAddedHandler>()
.SingleInstance();
builder.RegisterType <ShellChangeHandler>()
.As <IShellChangeHandler>()
.As <IEventHandler>()
.Named <IEventHandler>(typeof(IShellDescriptorManagerEventHandler).Name)
.Named <IEventHandler>(typeof(IShellSettingsManagerEventHandler).Name)
.SingleInstance();
}))
{
HttpContextBase httpContext;
// Resolving will fail if it's just the setup shell. TryResolve() would still cause this exception.
try
{
// Will return the stub from Orchard.Mvc.MvcModule. There are some direct resolve calls to HttpContextBase in
// Orchard but it doesn't matter here (otherwise it does: https://github.com/OrchardCMS/Orchard/issues/4607) as the
// point is to keep the WorkContext in HttpContext.Items the same throughout this scope (unless a new WCS is
// started somewhere).
httpContext = scope.Resolve <HttpContextBase>();
}
catch (DependencyResolutionException ex)
{
// Unfortunately the only way to identify the specific exception is by its message.
if (ex.Message.StartsWith("No scope with a Tag matching 'work' is visible from the scope in which the instance"))
{
httpContext = new AppHostHttpContextAccessor.HttpContextPlaceholder();
}
else
{
throw;
}
}
hca.Set(httpContext);
var logger = scope.Resolve <ILoggerService>();
var orchardHost = scope.Resolve <IOrchardHost>();
var previousTenantState = TenantState.Invalid;
orchardHost.BeginRequest();
try
{
using (var workContext = scope.CreateWorkContextScope(httpContext))
{
try
{
await process(workContext);
previousTenantState = workContext.Resolve <ShellSettings>().State;
}
catch (Exception ex)
{
if (ex.IsFatal())
{
throw;
}
logger.Error(ex, "Error when executing work inside Orchard App Host.");
throw;
}
}
}
finally
{
var shellSettingManagerEventHandler = _hostContainer.Resolve <IShellSettingsManagerEventHandler>();
var shellSettings = scope.Resolve <IShellSettingsManager>().LoadSettings().SingleOrDefault(settings => settings.Name == shellName);
// This means that setup just run. During setup the shell-tracking services are not registered.
if (previousTenantState == TenantState.Invalid && shellSettings != null && shellSettings.State == TenantState.Running)
{
shellSettingManagerEventHandler.Saved(shellSettings);
}
else
{
// Due to possibly await-ed calls in the process we keep track of everything that is stored in ContextState<T> normally.
// This is needed because ContextState<T> looses state on thread switch.
// Here we re-apply every change so the necessary services will get to know everything.
var shellChangeHandler = scope.Resolve <IShellChangeHandler>();
var shellDescriptorManagerEventHandler = _hostContainer.Resolve <IShellDescriptorManagerEventHandler>();
foreach (var changedShellDescriptor in shellChangeHandler.GetChangedShellDescriptors())
{
shellDescriptorManagerEventHandler.Changed(changedShellDescriptor.ShellDescriptor, changedShellDescriptor.TenantName);
}
foreach (var changedShellSettings in shellChangeHandler.GetChangedShellSettings())
{
shellSettingManagerEventHandler.Saved(changedShellSettings);
}
var processingEngine = _hostContainer.Resolve <IProcessingEngine>();
var processingEngineTaskAddedHandler = scope.Resolve <IProcessingEngineTaskAddedHandler>();
foreach (var task in processingEngineTaskAddedHandler.GetAddedTasks())
{
processingEngine.AddTask(task.ShellSettings, task.ShellDescriptor, task.MessageName, task.Parameters);
}
}
// Either this or running tasks through IProcessingEngine and restarting shells manually.
// EndRequest() can have unwanted side effects in the future.
orchardHost.EndRequest();
}
}
}
public async Task Run(Func <IWorkContextScope, Task> process, string shellName)
{
var shellContext = _hostContainer.Resolve <IOrchardHost>().GetShellContext(new ShellSettings {
Name = shellName
});
// We need a single HCA, and thus the same HttpContext throughout this scope to carry the work context.
// Especially important for async code, see: https://github.com/OrchardCMS/Orchard/issues/4338
// Using InstancePerLifetimeScope() inside the shell ContinerBuilder still yields multiple instantiations.
var hca = new AppHostHttpContextAccessor();
using (var scope = shellContext.LifetimeScope.BeginLifetimeScope(
RunScopeTag,
builder =>
{
builder.RegisterInstance(hca).As <IHttpContextAccessor>();
// Needed so it gets the AppHostHttpContextAccessor instance registered in Run().
builder.RegisterType <WorkContextAccessor>().As <IWorkContextAccessor>().SingleInstance();
builder.RegisterType <ProcessingEngineTaskAddedHandler>()
.As <IProcessingEngine>()
.As <IProcessingEngineTaskAddedHandler>()
.SingleInstance();
builder.RegisterType <ShellChangeHandler>()
.As <IShellChangeHandler>()
.As <IEventHandler>()
.Named <IEventHandler>(typeof(IShellDescriptorManagerEventHandler).Name)
.Named <IEventHandler>(typeof(IShellSettingsManagerEventHandler).Name)
.SingleInstance();
}))
{
var httpContext = new MvcModule.HttpContextPlaceholder(() => "http://localhost");
hca.Set(httpContext);
var logger = scope.Resolve <ILoggerService>();
var orchardHost = scope.Resolve <IOrchardHost>();
var previousTenantState = TenantState.Invalid;
orchardHost.BeginRequest();
try
{
using (var workContext = scope.CreateWorkContextScope(httpContext))
{
try
{
await process(workContext);
previousTenantState = workContext.Resolve <ShellSettings>().State;
}
catch (Exception ex)
{
if (ex.IsFatal())
{
throw;
}
logger.Error(ex, "Error when executing work inside Orchard App Host.");
throw;
}
}
}
finally
{
var shellSettingManagerEventHandler = _hostContainer.Resolve <IShellSettingsManagerEventHandler>();
var shellSettings = scope
.Resolve <IShellSettingsManager>()
.LoadSettings()
.SingleOrDefault(settings => settings.Name == shellName);
// This means that setup just run. During setup the shell-tracking services are not registered.
if (previousTenantState == TenantState.Invalid &&
shellSettings != null &&
shellSettings.State == TenantState.Running)
{
shellSettingManagerEventHandler.Saved(shellSettings);
}
else
{
// Due to possibly await-ed calls in the process we keep track of everything that is stored in
// ContextState<T> normally.
// This is needed because ContextState<T> looses state on thread switch.
// Here we re-apply every change so the necessary services will get to know everything.
var shellChangeHandler = scope.Resolve <IShellChangeHandler>();
var shellDescriptorManagerEventHandler = _hostContainer.Resolve <IShellDescriptorManagerEventHandler>();
foreach (var changedShellDescriptor in shellChangeHandler.GetChangedShellDescriptors())
{
shellDescriptorManagerEventHandler
.Changed(changedShellDescriptor.ShellDescriptor, changedShellDescriptor.TenantName);
}
foreach (var changedShellSettings in shellChangeHandler.GetChangedShellSettings())
{
shellSettingManagerEventHandler.Saved(changedShellSettings);
}
var processingEngine = _hostContainer.Resolve <IProcessingEngine>();
var processingEngineTaskAddedHandler = scope.Resolve <IProcessingEngineTaskAddedHandler>();
foreach (var task in processingEngineTaskAddedHandler.GetAddedTasks())
{
processingEngine.AddTask(task.ShellSettings, task.ShellDescriptor, task.MessageName, task.Parameters);
}
}
// Either this or running tasks through IProcessingEngine and restarting shells manually.
// EndRequest() can have unwanted side effects in the future.
orchardHost.EndRequest();
}
}
}