async ValueTask RunCore(ConsoleAppContext _)
{
var result = methodInfo.Invoke(instance, invokeArgs);
if (result != null)
{
switch (result)
{
case int exitCode:
invokeResult = exitCode;
break;
case Task <int> taskWithExitCode:
invokeResult = await taskWithExitCode;
break;
case Task task:
await task;
break;
case ValueTask <int> valueTaskWithExitCode:
invokeResult = await valueTaskWithExitCode;
break;
case ValueTask valueTask:
await valueTask;
break;
}
}
}
public async Task RunAsync(Type type, MethodInfo method, string?[] args)
{
logger.LogTrace("ConsoleAppEngine.Run Start");
var ctx = new ConsoleAppContext(args, DateTime.UtcNow, cancellationToken, logger);
await RunCore(ctx, type, method, args, 1); // 0 is type selector
}
// Try to invoke method.
async Task RunCore(Type type, MethodInfo methodInfo, object?instance, string?[] args, int argsOffset)
{
object?[] invokeArgs;
ParameterInfo[] originalParameters = methodInfo.GetParameters();
var isService = provider.GetService <IServiceProviderIsService>();
try
{
var parameters = originalParameters;
if (isService != null)
{
parameters = parameters.Where(x => !(x.ParameterType == typeof(ConsoleAppContext) || isService.IsService(x.ParameterType))).ToArray();
}
if (!TryGetInvokeArguments(parameters, args, argsOffset, out invokeArgs, out var errorMessage))
{
await SetFailAsync(errorMessage + " args: " + string.Join(" ", args));
return;
}
}
catch (Exception ex)
{
await SetFailAsync("Fail to match method parameter on " + type.Name + "." + methodInfo.Name + ". args: " + string.Join(" ", args), ex);
return;
}
var ctx = new ConsoleAppContext(args, DateTime.UtcNow, cancellationToken, logger, methodInfo, provider);
// re:create invokeArgs, merge with DI parameter.
if (invokeArgs.Length != originalParameters.Length)
{
var newInvokeArgs = new object?[originalParameters.Length];
var invokeArgsIndex = 0;
for (int i = 0; i < originalParameters.Length; i++)
{
var p = originalParameters[i].ParameterType;
if (p == typeof(ConsoleAppContext))
{
newInvokeArgs[i] = ctx;
}
else if (isService !.IsService(p))
{
try
{
newInvokeArgs[i] = provider.GetService(p);
}
catch (Exception ex)
{
await SetFailAsync("Fail to get service parameter. ParameterType:" + p.FullName, ex);
return;
}
}
else
{
newInvokeArgs[i] = invokeArgs[invokeArgsIndex++];
}
}
public WithFilterInvoker(MethodInfo methodInfo, object instance, object[] invokeArgs, IServiceProvider serviceProvider, ConsoleAppFilter[] globalFilters, ConsoleAppContext context)
{
this.methodInfo = methodInfo;
this.instance = instance;
this.invokeArgs = invokeArgs;
this.serviceProvider = serviceProvider;
this.globalFilters = globalFilters;
this.context = context;
}
public async ValueTask OnEngineCompleteAsync(ConsoleAppContext context, string?errorMessageIfFailed, Exception?exceptionIfExists)
{
var exceptions = new AggregateExceptionHolder();
foreach (var item in interceptors)
{
try
{
await item.OnEngineCompleteAsync(context, errorMessageIfFailed, exceptionIfExists);
}
catch (Exception e)
{
exceptions.Add(e);
}
}
exceptions.ThrowIfExists();
}
public async ValueTask OnMethodBeginAsync(ConsoleAppContext context)
{
var exceptions = new AggregateExceptionHolder();
foreach (var item in interceptors)
{
try
{
await item.OnMethodBeginAsync(context);
}
catch (Exception e)
{
exceptions.Add(e);
}
}
exceptions.ThrowIfExists();
}
async Task RunCore(Type type, MethodInfo methodInfo, string?[] args, int argsOffset)
{
object instance;
object[] invokeArgs;
try
{
if (!TryGetInvokeArguments(methodInfo.GetParameters(), args, argsOffset, out invokeArgs, out var errorMessage))
{
await SetFailAsync(errorMessage + " args: " + string.Join(" ", args));
return;
}
}
catch (Exception ex)
{
await SetFailAsync("Fail to match method parameter on " + type.Name + "." + methodInfo.Name + ". args: " + string.Join(" ", args), ex);
return;
}
var ctx = new ConsoleAppContext(args, DateTime.UtcNow, cancellationToken, logger, methodInfo, provider);
try
{
instance = provider.GetService(type);
typeof(ConsoleAppBase).GetProperty(nameof(ConsoleAppBase.Context)).SetValue(instance, ctx);
}
catch (Exception ex)
{
await SetFailAsync("Fail to create ConsoleAppBase instance. Type:" + type.FullName, ex);
return;
}
try
{
var invoker = new WithFilterInvoker(methodInfo, instance, invokeArgs, provider, options.GlobalFilters ?? Array.Empty <ConsoleAppFilter>(), ctx);
var result = await invoker.InvokeAsync();
if (result != null)
{
Environment.ExitCode = result.Value;
}
}
catch (Exception ex)
{
if (ex is OperationCanceledException operationCanceledException && operationCanceledException.CancellationToken == cancellationToken)
{
// NOTE: Do nothing if the exception has thrown by the CancellationToken of ConsoleAppEngine.
// If the user code throws OperationCanceledException, ConsoleAppEngine should not handle that.
return;
}
if (ex is TargetInvocationException tex)
{
await SetFailAsync("Fail in console app running on " + type.Name + "." + methodInfo.Name, tex.InnerException);
return;
}
else
{
await SetFailAsync("Fail in console app running on " + type.Name + "." + methodInfo.Name, ex);
return;
}
}
logger.LogTrace("ConsoleAppEngine.Run Complete Successfully");
}
public ValueTask OnEngineCompleteAsync(ConsoleAppContext context, string?errorMessageIfFailed, Exception?exceptionIfExists)
{
return(Empty);
}
public ValueTask OnMethodBeginAsync(ConsoleAppContext context)
{
return(Empty);
}
public async Task RunAsync(Type type, string[] args)
{
logger.LogTrace("ConsoleAppEngine.Run Start");
int argsOffset = 0;
MethodInfo?method = null;
var ctx = new ConsoleAppContext(args, DateTime.UtcNow, cancellationToken, logger);
try
{
await interceptor.OnMethodBeginAsync(ctx);
if (type == typeof(void))
{
await SetFailAsync(ctx, "Type or method does not found on this Program. args: " + string.Join(" ", args));
return;
}
var methods = type.GetMethods(BindingFlags.Public | BindingFlags.Instance | BindingFlags.DeclaredOnly);
if (methods.Length == 0)
{
await SetFailAsync(ctx, "Method can not select. T of Run/UseConsoleAppEngine<T> have to be contain single method or command. Type:" + type.FullName);
return;
}
MethodInfo?helpMethod = null;
foreach (var item in methods)
{
var command = item.GetCustomAttribute <CommandAttribute>();
if (command != null)
{
if (args.Length > 0 && command.EqualsAny(args[0]))
{
// command's priority is first
method = item;
argsOffset = 1;
goto RUN;
}
else
{
if (command.EqualsAny("help"))
{
helpMethod = item;
}
}
}
else
{
if (method != null)
{
await SetFailAsync(ctx, "Found more than one public methods(without command). Type:" + type.FullName + " Method:" + method.Name + " and " + item.Name);
return;
}
method = item; // found single public(non-command) method.
}
}
if (method != null)
{
goto RUN;
}
// completely not found, invalid command name show help.
if (helpMethod != null)
{
method = helpMethod;
goto RUN;
}
else
{
Console.Write(new CommandHelpBuilder().BuildHelpMessage(methods, null));
await interceptor.OnMethodEndAsync(ctx, null, null);
return;
}
}
catch (Exception ex)
{
await SetFailAsync(ctx, "Fail to get method. Type:" + type.FullName, ex);
return;
}
RUN:
await RunCore(ctx, type, method, args, argsOffset);
}
async ValueTask SetFailAsync(ConsoleAppContext context, string message, Exception ex)
{
Environment.ExitCode = 1;
logger.LogError(ex, message);
await interceptor.OnMethodEndAsync(context, message, ex);
}
async Task RunCore(ConsoleAppContext ctx, Type type, MethodInfo methodInfo, string?[] args, int argsOffset)
{
object instance;
object[] invokeArgs;
try
{
if (!TryGetInvokeArguments(methodInfo.GetParameters(), args, argsOffset, out invokeArgs, out var errorMessage))
{
await SetFailAsync(ctx, errorMessage + " args: " + string.Join(" ", args));
return;
}
}
catch (Exception ex)
{
await SetFailAsync(ctx, "Fail to match method parameter on " + type.Name + "." + methodInfo.Name + ". args: " + string.Join(" ", args), ex);
return;
}
try
{
instance = provider.GetService(type);
typeof(ConsoleAppBase).GetProperty(nameof(ConsoleAppBase.Context)).SetValue(instance, ctx);
}
catch (Exception ex)
{
await SetFailAsync(ctx, "Fail to create ConsoleAppBase instance. Type:" + type.FullName, ex);
return;
}
try
{
var result = methodInfo.Invoke(instance, invokeArgs);
switch (result)
{
case int exitCode:
Environment.ExitCode = exitCode;
break;
case Task <int> taskWithExitCode:
Environment.ExitCode = await taskWithExitCode;
break;
case Task task:
await task;
break;
case ValueTask <int> valueTaskWithExitCode:
Environment.ExitCode = await valueTaskWithExitCode;
break;
case ValueTask valueTask:
await valueTask;
break;
}
}
catch (Exception ex)
{
if (ex is OperationCanceledException operationCanceledException && operationCanceledException.CancellationToken == cancellationToken)
{
// NOTE: Do nothing if the exception has thrown by the CancellationToken of ConsoleAppEngine.
// If the user code throws OperationCanceledException, ConsoleAppEngine should not handle that.
return;
}
if (ex is TargetInvocationException tex)
{
await SetFailAsync(ctx, "Fail in console app running on " + type.Name + "." + methodInfo.Name, tex.InnerException);
return;
}
else
{
await SetFailAsync(ctx, "Fail in console app running on " + type.Name + "." + methodInfo.Name, ex);
return;
}
}
await interceptor.OnMethodEndAsync(ctx, null, null);
logger.LogTrace("ConsoleAppEngine.Run Complete Successfully");
}
ValueTask InvokeAsync(ConsoleAppContext context)
{
return(filter.Invoke(context, next));
}
public abstract ValueTask Invoke(ConsoleAppContext context, Func <ConsoleAppContext, ValueTask> next);
async ValueTask SetFailAsync(ConsoleAppContext context, string message)
{
Environment.ExitCode = 1;
logger.LogError(message);
await interceptor.OnEngineCompleteAsync(context, message, null);
}
public ValueTask OnMethodEndAsync(ConsoleAppContext context, string?errorMessageIfFailed, Exception?exceptionIfExists)
{
return(Empty);
}