bool Invoke <T>(AADCommand command, ISerializable parameters, [NotNullWhen(true)] out T?result) where T : class, ISerializable
{
result = null;
if (!IsConnected)
{
return(false);
}
var r = InvokeOne(command, parameters, out var result2);
Debug2.Assert(r != ExecutionResult.UnknownCommand);
// internal error, we should fix it
switch (r)
{
case ExecutionResult.IOError:
case ExecutionResult.Disconnect:
Disconnect();
return(false);
case ExecutionResult.Success:
result = result2 as T;
return(result is not null);
default:
return(false);
}
}
/// <summary>
/// Connects to a waiting server within the specified time-out period.
/// </summary>
/// <param name="timeout">The number of milliseconds to wait for the client to connect before the connection times out.</param>
/// <returns></returns>
bool WaitForConnection(int timeout)
{
// TODO: timeout
Debug2.Assert(!IsConnected);
var stream = (NamedPipeServerStream)base.stream;
stream.WaitForConnection();
return(IsConnected);
}
/// <summary>
/// Get the image bytes asynchronously. Must be called from the main thread,
/// as the <see cref="DataPath"/> is accessed and Realm can only be used from the main
/// thread. If you need to access the data from another thread, call
/// <see cref="PrepareImageLoad"/> on the main thread and then call
/// <see cref="PreparedImageLoad.GetDataAsync"/> on it.
/// </summary>
/// <returns></returns>
public virtual async Task <byte[]> GetDataAsync()
{
var dataPath = DataPath; // DO NOT INLINE! See method documentation.
Debug2.Assert(dataPath != null, $"dataPath is null for media with REST ID {IdForRestApi}");
return(await MediaCache.GetBytesAsync(
IdForRestApi,
async() => await fileManager.ReadFromDiskAsync(dataPath)
));
}
/// <summary>
/// Execute one command and return execution result
/// </summary>
/// <returns></returns>
/// <remarks>See invoker: <seealso cref="AADClient.InvokeOne(AADCommand, ISerializable, out ISerializable?)"/></remarks>
ExecutionResult ExecuteOne()
{
try {
ReadCommand(out var command);
if (command == AADCommand.Disconnect)
{
return(ExecutionResult.Disconnect);
}
if (!CommandHandlerManager.Handlers.TryGetValue(command, out var handler))
{
Debug2.Assert(false);
return(ExecutionResult.UnknownCommand);
}
// phase 1: get the handler corresponding to the command
if (Activator.CreateInstance(handler.ParametersType, true) is not ISerializable parameters)
{
throw new InvalidOperationException("Can't create parameters object");
}
// phase 2: create parameters instance
Read(parameters);
// phase 3: read parameters from stream
bool b;
ISerializable?result;
try {
b = handler.Execute(parameters, out result);
}
catch (Exception ex) {
WriteCommand(AADCommand.UnhandledException);
Write(new AADServerInvocationException(ex.ToFullString()));
return(ExecutionResult.UnhandledException);
}
if (!b)
{
WriteCommand(AADCommand.Failure);
return(ExecutionResult.Failure);
}
// phase 4: execute command with parameters
WriteCommand(AADCommand.Success);
Write(result !);
// phase 5: write result to stream
return(ExecutionResult.Success);
}
catch (Exception ex) {
Debug2.Assert(ex is IOException);
// regard all unhandable exceptions as IO error
return(ExecutionResult.IOError);
}
}
void InitializeMenus()
{
guidToMenu = new Dictionary <Guid, List <MenuMD> >();
foreach (var item in mefMenus)
{
string ownerGuidString = item.Metadata.OwnerGuid ?? MenuConstants.APP_MENU_GUID;
bool b = Guid.TryParse(ownerGuidString, out var ownerGuid);
Debug.Assert(b, $"Menu: Couldn't parse OwnerGuid property: '{ownerGuidString}'");
if (!b)
{
continue;
}
var guidString = item.Metadata.Guid;
b = Guid.TryParse(guidString, out var guid);
Debug.Assert(b, $"Menu: Couldn't parse Guid property: '{guidString}'");
if (!b)
{
continue;
}
var header = item.Metadata.Header;
b = !string.IsNullOrEmpty(header);
Debug2.Assert(b, "Menu: Header is null or empty");
if (!b)
{
continue;
}
if (!guidToMenu.TryGetValue(ownerGuid, out var list))
{
guidToMenu.Add(ownerGuid, list = new List <MenuMD>());
}
list.Add(new MenuMD(item));
}
foreach (var list in guidToMenu.Values)
{
var hash = new HashSet <Guid>();
var origList = new List <MenuMD>(list);
list.Clear();
foreach (var menu in origList)
{
var guid = new Guid(menu.Metadata.Guid !);
if (hash.Contains(guid))
{
continue;
}
hash.Add(guid);
list.Add(menu);
}
list.Sort((a, b) => a.Metadata.Order.CompareTo(b.Metadata.Order));
}
}
private void AddContentToPage(Page dbPage, PageDto pageDto, FetchedMediaData fetchedMedia)
{
if (pageDto != null && dbPage != null)
{
PageConverter.Convert(pageDto, dbPage);
switch (dbPage)
{
case ImagePage imagePage:
var image = fetchedMedia.Images.SingleOrDefault(x => x.IdForRestApi == pageDto.Image);
imagePage.Image = image ?? BackupData.BackupImage;
break;
case TextPage textPage:
break;
case TimeSliderPage timeSliderPage:
var fetchedImages = fetchedMedia.Images;
if (fetchedImages.Count > 0)
{
Debug2.Assert(timeSliderPage.SliderImages.Count == pageDto.Images.Count);
for (var i = 0; i < timeSliderPage.SliderImages.Count; i++)
{
var imageId = pageDto.Images[i].Image;
var dbImage = fetchedImages.FirstOrDefault(img => img.IdForRestApi == imageId);
timeSliderPage.SliderImages[i].Image = dbImage;
}
}
else
{
timeSliderPage.SliderImages.Add(new TimeSliderPageImage
{
Page = timeSliderPage,
Image = BackupData.BackupImage
});
}
break;
}
var audio = fetchedMedia.Audios.SingleOrDefault(x => x.IdForRestApi == pageDto.Audio);
if (audio != null)
{
dbPage.Audio = audio;
}
}
}
/// <summary>
/// Invoke one specified command with parameters
/// </summary>
/// <param name="command"></param>
/// <param name="parameters"></param>
/// <param name="result"></param>
/// <returns></returns>
/// <remarks>See executor: <seealso cref="AADServer.ExecuteOne"/></remarks>
ExecutionResult InvokeOne(AADCommand command, ISerializable parameters, out ISerializable?result)
{
result = null;
try {
if (!CommandHandlerManager.Handlers.TryGetValue(command, out var handler))
{
Debug2.Assert(false);
return(ExecutionResult.UnknownCommand);
}
// phase 1: get the handler corresponding to the command
WriteCommand(command);
Write(parameters);
// phase 2: write parameters to stream
ReadCommand(out var resultCommand);
if (resultCommand == AADCommand.UnhandledException)
{
var exception = new AADServerInvocationException();
Read(exception);
throw exception;
}
if (resultCommand != AADCommand.Success)
{
return(ExecutionResult.Failure);
}
// phase 3: read execution result
result = Activator.CreateInstance(handler.ResultType, true) as ISerializable;
if (result is null)
{
throw new InvalidOperationException("Can't create result object");
}
// phase 4: create result instance
Read(result);
// phase 5: read result from stream
return(ExecutionResult.Success);
}
catch (AADServerInvocationException) {
throw;
}
catch (Exception ex) {
Debug2.Assert(ex is IOException);
// regard all unhandable exceptions as IO error
return(ExecutionResult.IOError);
}
}
static bool CheckEquivalent(TypeDef td)
{
Debug2.Assert(td != null);
for (int i = 0; td != null && i < 1000; i++)
{
if (i != 0)
{
var info = GetInfo(td);
if (info == null)
{
return(false);
}
}
bool f;
if (td.IsInterface)
{
f = td.IsImport || td.CustomAttributes.IsDefined("System.Runtime.InteropServices.ComEventInterfaceAttribute");
}
else
{
f = td.IsValueType || td.IsDelegate;
}
if (!f)
{
return(false);
}
if (td.GenericParameters.Count > 0)
{
return(false);
}
var declType = td.DeclaringType;
if (declType == null)
{
return(td.IsPublic);
}
if (!td.IsNestedPublic)
{
return(false);
}
td = declType;
}
return(false);
}
/// <summary>
/// Execute loop until disconnect
/// </summary>
/// <returns><see langword="true"/> if disconnected by command, <see langword="false"/> if client disconnects without sending command</returns>
/// <remarks>Guarantee no exception thrown</remarks>
bool Execute()
{
while (true)
{
var r = ExecuteOne();
Debug2.Assert(r != ExecutionResult.UnknownCommand);
// internal error, we should fix it
switch (r)
{
case ExecutionResult.IOError:
case ExecutionResult.Disconnect:
Disconnect();
return(r == ExecutionResult.Disconnect);
}
}
}
public IEnumerable <ModuleInfo> EnumerateModules()
{
foreach (var client in AADExtensions.EnumerateAADClients(processId))
{
var runtime = client.Runtime;
foreach (var module in client.EnumerateModules())
{
var peInfo = client.GetPEInfo(module);
if (peInfo.IsInvalid)
{
// may be ngen image and corresponding IL image not loaded TODO: get native image, not IL image
yield return(new DotNetModuleInfo(module.AssemblyName, unchecked ((nuint)(-1)), 0, "NGEN", module.DomainName, $"v{runtime.FileVersion}"));
continue;
}
var layout = peInfo.LoadedLayout;
Debug2.Assert(!layout.IsInvalid);
yield return(new DotNetModuleInfo(module.AssemblyName, (nuint)layout.ImageBase, layout.ImageSize, peInfo.FilePath, module.DomainName, $"v{runtime.FileVersion}"));
}
}
}
/// <summary>
/// Create <see cref="AADServer"/>s in other application domains and get corresponding <see cref="AADClient"/>s
/// </summary>
/// <param name="clients"></param>
/// <returns></returns>
public bool EnableMultiDomain(out AADClient[] clients)
{
if (mainClient is not null)
{
Debug2.Assert(false, "do NOT call EnableMultiDomain in sub AADClient");
clients = Array2.Empty <AADClient>();
return(false);
}
if (multiDomainClients is not null)
{
foreach (var client in multiDomainClients)
{
Debug2.Assert(client.IsConnected);
}
clients = multiDomainClients;
return(true);
}
clients = Array2.Empty <AADClient>();
if (!Invoke <Handlers.EnableMultiDomainHandler.PipeNames>(AADCommand.EnableMultiDomain, EmptySerializable.Instance, out var pipeNames))
{
return(false);
}
clients = new AADClient[pipeNames.Values.Length];
for (int i = 0; i < clients.Length; i++)
{
var client = Create(pipeNames.Values[i], this);
if (client is null)
{
return(false);
}
clients[i] = client;
}
multiDomainClients = clients;
return(true);
}
public static async Task Init()
{
// We do NOT use DbManager.InTransaction() here because that would attach BackupImage & BackupImageTag
// to the transaction and these properties are still null at this point.
var dataAccess = IoCManager.Resolve <IDataAccess>();
var fileManager = IoCManager.Resolve <IMediaFileManager>();
var dataLoader = IoCManager.Resolve <IDataLoader>();
backupImage = dataAccess.GetItems <Image>().SingleOrDefault(x => x.IdForRestApi == BackupImageIdForRestApi);
backupImageTag = dataAccess.GetItems <Image>().SingleOrDefault(x => x.IdForRestApi == BackupImageTagIdForRestApi);
string backupImagePath;
if (backupImage == null)
{
backupImageData = dataLoader.LoadByteData("noImage.png");
backupImagePath = await fileManager.WriteMediaToDiskAsync(backupImageData, BackupImageIdForRestApi, BackupTimestamp);
}
else
{
backupImagePath = null;
}
string backupImageTagPath;
if (backupImageTag == null)
{
var backupImageDataTag = dataLoader.LoadByteData("noImageTag.jpg");
backupImageTagPath = await fileManager.WriteMediaToDiskAsync(backupImageDataTag, BackupImageTagIdForRestApi, BackupTimestamp);
}
else
{
backupImageTagPath = null;
}
dataAccess.InTransaction(Enumerable.Empty <object>(), transaction =>
{
var transactionDataAccess = transaction.DataAccess;
if (backupImage == null)
{
backupImageData = dataLoader.LoadByteData("noImage.png");
Debug2.Assert(backupImagePath != null);
transactionDataAccess.AddItem(backupImage = new Image
{
Title = "No Image",
Description = "Hier fehlt das Bild",
IdForRestApi = BackupImageIdForRestApi,
DataPath = backupImagePath
});
}
if (backupImageTag == null)
{
Debug2.Assert(backupImageTagPath != null);
transactionDataAccess.AddItem(backupImageTag = new Image
{
Title = "No Tag Image",
Description = "Hier fehlt das Tag-Bild",
IdForRestApi = BackupImageTagIdForRestApi,
DataPath = backupImageTagPath
});
}
mockAudioData = dataLoader.LoadByteData("mockaudio.mp3");
return(0);
});
IsInitializedSema.Release();
}
/// <summary>
/// Read <see cref="ISerializable"/> instance which has simple internal layout
/// </summary>
/// <param name="destination"></param>
/// <param name="obj"></param>
/// <returns></returns>
/// <remarks>Should only called by <see cref="ISerializable.Deserialize(Stream)(Stream)"/> to quick deserialize itself</remarks>
public static bool Read(Stream source, ISerializable obj)
{
var fields = obj.GetType().GetFields(System.Reflection.BindingFlags.Public | System.Reflection.BindingFlags.Instance);
foreach (var field in fields)
{
object?value;
var fieldType = field.FieldType;
switch (Type.GetTypeCode(fieldType))
{
case TypeCode.Boolean:
if (!Serializer.ReadBoolean(source, out bool b))
{
return(false);
}
value = b;
goto next;
case TypeCode.Byte:
if (!Serializer.ReadByte(source, out byte u1))
{
return(false);
}
value = u1;
goto next;
case TypeCode.Int32:
if (!Serializer.ReadInt32(source, out int i4))
{
return(false);
}
value = i4;
goto next;
case TypeCode.UInt32:
if (!Serializer.ReadUInt32(source, out uint u4))
{
return(false);
}
value = u4;
goto next;
case TypeCode.Int64:
if (!Serializer.ReadInt64(source, out long i8))
{
return(false);
}
value = i8;
goto next;
case TypeCode.UInt64:
if (!Serializer.ReadUInt64(source, out ulong u8))
{
return(false);
}
value = u8;
goto next;
case TypeCode.String:
if (!Serializer.ReadString(source, out var s))
{
return(false);
}
value = s;
goto next;
}
if (fieldType == typeof(byte[]))
{
if (!Serializer.ReadBytes(source, out var bin))
{
return(false);
}
value = bin;
goto next;
}
if (fieldType == typeof(int[]))
{
if (!Serializer.ReadInt32Array(source, out var i4s))
{
return(false);
}
value = i4s;
goto next;
}
if (fieldType == typeof(uint[]))
{
if (!Serializer.ReadUInt32Array(source, out var u4s))
{
return(false);
}
value = u4s;
goto next;
}
if (fieldType == typeof(long[]))
{
if (!Serializer.ReadInt64Array(source, out var i8s))
{
return(false);
}
value = i8s;
goto next;
}
if (fieldType == typeof(ulong[]))
{
if (!Serializer.ReadUInt64Array(source, out var u8s))
{
return(false);
}
value = u8s;
goto next;
}
if (fieldType == typeof(string[]))
{
if (!Serializer.ReadStringArray(source, out var ss))
{
return(false);
}
value = ss;
goto next;
}
if (typeof(ISerializable).IsAssignableFrom(fieldType))
{
var o = (ISerializable)Activator.CreateInstance(fieldType, true);
if (!Read(source, o))
{
return(false);
}
value = o;
goto next;
}
Debug2.Assert(false);
return(false);
next:
field.SetValue(obj, value);
}
return(true);
}
/// <summary>
/// Write <see cref="ISerializable"/> instance which has simple internal layout
/// </summary>
/// <param name="destination"></param>
/// <param name="obj"></param>
/// <returns></returns>
/// <remarks>Should only called by <see cref="ISerializable.Serialize(Stream)"/> to quick serialize itself</remarks>
public static bool Write(Stream destination, ISerializable obj)
{
var fields = obj.GetType().GetFields(System.Reflection.BindingFlags.Public | System.Reflection.BindingFlags.Instance);
foreach (var field in fields)
{
var value = field.GetValue(obj);
switch (Type.GetTypeCode(field.FieldType))
{
case TypeCode.Boolean:
if (!Serializer.WriteBoolean(destination, (bool)value))
{
return(false);
}
continue;
case TypeCode.Byte:
if (!Serializer.WriteByte(destination, (byte)value))
{
return(false);
}
continue;
case TypeCode.Int32:
if (!Serializer.WriteInt32(destination, (int)value))
{
return(false);
}
continue;
case TypeCode.UInt32:
if (!Serializer.WriteUInt32(destination, (uint)value))
{
return(false);
}
continue;
case TypeCode.Int64:
if (!Serializer.WriteInt64(destination, (long)value))
{
return(false);
}
continue;
case TypeCode.UInt64:
if (!Serializer.WriteUInt64(destination, (ulong)value))
{
return(false);
}
continue;
case TypeCode.String:
if (!Serializer.WriteString(destination, (string)value))
{
return(false);
}
continue;
}
if (value is int[] i4s)
{
if (!Serializer.WriteInt32Array(destination, i4s))
{
return(false);
}
continue;
}
if (value is uint[] u4s)
{
if (!Serializer.WriteUInt32Array(destination, u4s))
{
return(false);
}
continue;
}
if (value is long[] i8s)
{
if (!Serializer.WriteInt64Array(destination, i8s))
{
return(false);
}
continue;
}
if (value is ulong[] u8s)
{
if (!Serializer.WriteUInt64Array(destination, u8s))
{
return(false);
}
continue;
}
if (value is string[] ss)
{
if (!Serializer.WriteStringArray(destination, ss))
{
return(false);
}
continue;
}
if (value is byte[] bin)
{
if (!Serializer.WriteBytes(destination, bin))
{
return(false);
}
continue;
}
if (value is ISerializable o)
{
if (!Write(destination, o))
{
return(false);
}
continue;
}
Debug2.Assert(false);
return(false);
}
return(true);
}
