/// <inheritdoc/>
/// <remarks>Commands will be loaded regardless of presence of <see cref="CommandsHandlerAttribute"/>.</remarks>
/// <exception cref="InvalidOperationException">No mapped initializer for a command was found.</exception>
public Task <IEnumerable <ICommandInstanceDescriptor> > LoadFromMethodAsync(MethodInfo method, CancellationToken cancellationToken = default)
{
List <ICommandInstanceDescriptor> results = new List <ICommandInstanceDescriptor>();
_log?.LogTrace("Loading command {Name}", method.Name);
IEnumerable <CommandAttributeBase> attributes = method.GetCustomAttributes <CommandAttributeBase>(true);
if (!attributes.Any())
{
_log?.LogWarning("Cannot initialize command from {Handler}'s method {Name} - {Attribute} missing", method.DeclaringType.FullName, method.Name, nameof(CommandAttributeBase));
return(NullTask());
}
foreach (CommandAttributeBase attribute in attributes)
{
// ensure there's a valid initializer
ICommandInitializer initializer = _initializers.GetInitializer(attribute.GetType());
if (initializer == null)
{
throw new InvalidOperationException($"No initializer found for command type {attribute.GetType().Name}");
}
// add the command
CommandInstanceDescriptor descriptor = new CommandInstanceDescriptor(attribute, method);
results.Add(new CommandInstanceDescriptor(attribute, method));
_log?.LogTrace("Command {Name} from handler {Handler} loaded", descriptor.Method.Name, descriptor.GetHandlerType().Name);
}
return(Task.FromResult <IEnumerable <ICommandInstanceDescriptor> >(results));
}
public CommandManager(IVariableHelper variableHelper, [Named("CommandHelper")] IHelper <Action> commandHelper,
ICommandRepository commandRepository, ICommandInitializer commandInitializer)
{
VariableHelper = variableHelper;
CommandHelper = commandHelper;
CommandRepository = (CommandRepository)commandRepository;
CommandInitializer = (CommandInitializer)commandInitializer;
}
/// <summary>
/// Устанавливает компонент для инициализации экемпляра модели команды.
/// </summary>
/// <param name="initializer">Компонента для инициализации модели команды.</param>
/// <returns>Экземпляр билдера.</returns>
/// <exception cref="ArgumentNullException">Если <paramref name="initializer"/> равен <c>null</c>.</exception>
public CommandParserBuilder WithInitializer(ICommandInitializer initializer)
{
if (initializer == null)
{
throw new ArgumentNullException(nameof(initializer));
}
_initializerProvider = () => initializer;
return(this);
}
public MarsRoverExecuter()
{
var programAssembly = Assembly.GetExecutingAssembly();
var builder = new ContainerBuilder();
builder.RegisterAssemblyTypes(programAssembly)
.AsImplementedInterfaces().InstancePerLifetimeScope();
using (var container = builder.Build())
{
commandInitializer = container.Resolve <ICommandInitializer>();
roverManager = container.Resolve <IRoverManager>();
}
}
/// <inheritdoc/>
/// <remarks>Once already started, calling this method again will cause commands to be re-loaded.</remarks>
public async Task StartAsync(CancellationToken cancellationToken = default)
{
using (CancellationTokenSource cts = CancellationTokenSource.CreateLinkedTokenSource(cancellationToken, this._cts.Token))
{
await this._lock.WaitAsync(cts.Token).ConfigureAwait(false);
try
{
this._log?.LogDebug("Initializing commands");
// dispose commands since we're reloading them
this.DisposeCommands();
// ask loader to load from all specified assemblies and types
IEnumerable <ICommandInstanceDescriptor> descriptors = await _commandsLoader.LoadFromAssembliesAsync(_options.Assemblies ?? Enumerable.Empty <Assembly>(), cts.Token).ConfigureAwait(false);
descriptors = descriptors.Union(await _commandsLoader.LoadFromTypesAsync(_options.Classes.Select(t => t.GetTypeInfo()) ?? Enumerable.Empty <TypeInfo>(), cts.Token).ConfigureAwait(false));
// make sure there's no duplicates
descriptors = descriptors.Distinct();
// for each loaded command, handle pre-initialization and caching
foreach (ICommandInstanceDescriptor descriptor in descriptors)
{
CommandsHandlerAttribute handlerAttribute = descriptor.GetHandlerAttribute();
// check if handler is persistent. If so, request it from provider to pre-initialize
if (handlerAttribute?.IsPersistent == true)
{
this._log?.LogDebug("Pre-initializing command handler {Handler}", descriptor.GetHandlerType().Name);
this._handlerProvider.GetCommandHandler(descriptor, this._services);
}
// create all command instances
this._log?.LogDebug("Creating command instance {Name} from handler {Handler}", descriptor.Method.Name, descriptor.GetHandlerType().Name);
ICommandInitializer initializer = this._initializers.GetInitializer(descriptor.Attribute.GetType());
ICommandInstance instance = initializer.InitializeCommand(descriptor, _options);
this._commands.Add(descriptor, instance);
}
// mark as started
this._started = true;
this._log?.LogDebug("{Count} commands loaded", _commands.Count);
}
finally
{
this._lock.Release();
}
}
}
/// <summary>
/// Initializes an instance of <see cref="CliApplication"/>.
/// </summary>
public CliApplication(ApplicationMetadata metadata, ApplicationConfiguration configuration,
IConsole console, ICommandInputParser commandInputParser, ICommandSchemaResolver commandSchemaResolver,
ICommandFactory commandFactory, ICommandInitializer commandInitializer, IHelpTextRenderer helpTextRenderer)
{
_metadata = metadata.GuardNotNull(nameof(metadata));
_configuration = configuration.GuardNotNull(nameof(configuration));
_console = console.GuardNotNull(nameof(console));
_commandInputParser = commandInputParser.GuardNotNull(nameof(commandInputParser));
_commandSchemaResolver = commandSchemaResolver.GuardNotNull(nameof(commandSchemaResolver));
_commandFactory = commandFactory.GuardNotNull(nameof(commandFactory));
_commandInitializer = commandInitializer.GuardNotNull(nameof(commandInitializer));
_helpTextRenderer = helpTextRenderer.GuardNotNull(nameof(helpTextRenderer));
}
/// <summary>
/// Initializes an instance of <see cref="CliApplication"/>.
/// </summary>
public CliApplication(ApplicationMetadata metadata, ApplicationConfiguration configuration,
IConsole console, ICommandInputParser commandInputParser, ICommandSchemaResolver commandSchemaResolver,
ICommandFactory commandFactory, ICommandInitializer commandInitializer, IHelpTextRenderer helpTextRenderer)
{
_metadata = metadata;
_configuration = configuration;
_console = console;
_commandInputParser = commandInputParser;
_commandSchemaResolver = commandSchemaResolver;
_commandFactory = commandFactory;
_commandInitializer = commandInitializer;
_helpTextRenderer = helpTextRenderer;
}
public CustomCommandInitializer(Func <ICommandParserSettings> settingsProvider)
{
_sourceInitializer = new ParameterAttributeBasedCommandInitializer(settingsProvider);
}
// for initializers provider /// <summary>Maps command initializer for a command attribute type in Command Initializer Provider.</summary> /// <param name="builder">Hosted Commands Service builder.</param> /// <param name="commandArgumentType">Type of command attribute.</param> /// <param name="initializer">Initializer to use for given command attribute type.</param> /// <seealso cref="ICommandInitializerProvider"/> /// <seealso cref="ICommandInitializer"/> /// <seealso cref="CommandAttributeBase"/> /// <seealso cref="CommandInitializerProviderOptions.Initializers"/> public static IHostedCommandsServiceBuilder MapCommandInitializer(this IHostedCommandsServiceBuilder builder, Type commandArgumentType, ICommandInitializer initializer) => builder.ConfigureCommandInitializerProvider(options => options.Initializers[commandArgumentType] = initializer);
