private async Task <MethodInfo> CreateFunctionTarget(CancellationToken cancellationToken)
{
try
{
await VerifyPackageReferencesAsync();
string eventName = string.Format(MetricEventNames.FunctionCompileLatencyByLanguageFormat, _compilationService.Language);
using (_metricsLogger.LatencyEvent(eventName))
{
IDotNetCompilation compilation = await _compilationService.GetFunctionCompilationAsync(Metadata);
Assembly assembly = compilation.Emit(cancellationToken);
_assemblyLoader.CreateOrUpdateContext(Metadata, assembly, _metadataResolver, TraceWriter, Host.ScriptConfig.HostConfig.LoggerFactory);
FunctionSignature functionSignature = compilation.GetEntryPointSignature(_functionEntryPointResolver);
ImmutableArray <Diagnostic> bindingDiagnostics = ValidateFunctionBindingArguments(functionSignature, _triggerInputName, _inputBindings, _outputBindings, throwIfFailed: true);
TraceCompilationDiagnostics(bindingDiagnostics);
// Set our function entry point signature
_functionSignature = functionSignature;
return(_functionSignature.GetMethod(assembly));
}
}
catch (CompilationErrorException exc)
{
ImmutableArray <Diagnostic> diagnostics = AddFunctionDiagnostics(exc.Diagnostics);
// Here we only need to trace to system logs
TraceCompilationDiagnostics(diagnostics, LogTargets.System);
throw new CompilationErrorException(exc.Message, diagnostics);
}
}
private async Task ReloadScriptAsync()
{
// Reset cached function
_functionLoader.Reset();
_compilerErrorCount = 0;
LogOnPrimaryHost(string.Format(CultureInfo.InvariantCulture, "Script for function '{0}' changed. Reloading.", Metadata.Name), LogLevel.Information);
ImmutableArray <Diagnostic> compilationResult = ImmutableArray <Diagnostic> .Empty;
FunctionSignature signature = null;
try
{
IDotNetCompilation compilation = await _compilationService.GetFunctionCompilationAsync(Metadata);
compilationResult = compilation.GetDiagnostics();
// TODO: Invoking this without the assembly is not supported by all compilations
signature = compilation.GetEntryPointSignature(_functionEntryPointResolver, null);
compilationResult = ValidateFunctionBindingArguments(signature, _triggerInputName, _inputBindings, _outputBindings, compilationResult.ToBuilder());
}
catch (CompilationErrorException exc)
{
compilationResult = AddFunctionDiagnostics(compilationResult.AddRange(exc.Diagnostics));
}
TraceCompilationDiagnostics(compilationResult, LogTargets.User);
bool compilationSucceeded = !compilationResult.Any(d => d.Severity == DiagnosticSeverity.Error);
LogOnPrimaryHost(string.Format(CultureInfo.InvariantCulture, "Compilation {0}.", compilationSucceeded ? "succeeded" : "failed"), LogLevel.Information);
// If the compilation succeeded, AND:
// - We haven't cached a function (failed to compile on load), OR
// - We're referencing local function types (i.e. POCOs defined in the function) AND Our our function signature has changed
// Restart our host.
if (compilationSucceeded &&
(_functionSignature == null ||
(_functionSignature.HasLocalTypeReference || !_functionSignature.Equals(signature))))
{
await Host.RestartAsync().ConfigureAwait(false);
}
}