private async Task BindOutputsAsync(object input, Binder binder, ScriptInvocationResult result)
{
if (_outputBindings == null)
{
return;
}
_handleScriptReturnValue(result);
var outputBindingTasks = _outputBindings.Select(async binding =>
{
// apply the value to the binding
if (result.Outputs.TryGetValue(binding.Metadata.Name, out object value) && value != null)
{
BindingContext bindingContext = new BindingContext
{
TriggerValue = input,
Binder = binder,
BindingData = binder.BindingData,
Value = value
};
await binding.BindAsync(bindingContext).ConfigureAwait(false);
}
});
await Task.WhenAll(outputBindingTasks);
}
private void HandleOutputDictionary(ScriptInvocationResult result)
{
if (result.Return is JObject returnJson)
{
foreach (var pair in returnJson)
{
result.Outputs[pair.Key] = pair.Value.ToObject <object>();
}
}
}
protected override async Task <object> InvokeCore(object[] parameters, FunctionInvocationContext context)
{
// Need to wait for atleast one language worker process to be initialized before accepting invocations
await DelayUntilFunctionDispatcherInitialized();
string invocationId = context.ExecutionContext.InvocationId.ToString();
// TODO: fix extensions and remove
object triggerValue = TransformInput(parameters[0], context.Binder.BindingData);
var triggerInput = (_bindingMetadata.Name, _bindingMetadata.DataType ?? DataType.String, triggerValue);
var inputs = new[] { triggerInput }.Concat(await BindInputsAsync(context.Binder));
ScriptInvocationContext invocationContext = new ScriptInvocationContext()
{
FunctionMetadata = Metadata,
BindingData = context.Binder.BindingData, // This has duplicates too (of type DefaultHttpRequest). Needs to be removed after verifying this can indeed be constructed by the workers from the rest of the data being passed (https://github.com/Azure/azure-functions-host/issues/4735).
ExecutionContext = context.ExecutionContext,
Inputs = inputs,
ResultSource = new TaskCompletionSource <ScriptInvocationResult>(),
AsyncExecutionContext = System.Threading.ExecutionContext.Capture(),
Traceparent = Activity.Current?.Id,
Tracestate = Activity.Current?.TraceStateString,
Attributes = Activity.Current?.Tags,
// TODO: link up cancellation token to parameter descriptors
CancellationToken = CancellationToken.None,
Logger = context.Logger
};
_logger.LogDebug($"Sending invocation id:{invocationId}");
await _functionDispatcher.InvokeAsync(invocationContext);
ScriptInvocationResult result = await invocationContext.ResultSource.Task;
await BindOutputsAsync(triggerValue, context.Binder, result);
return(result.Return);
}
private void HandleReturnParameter(ScriptInvocationResult result)
{
result.Outputs[ScriptConstants.SystemReturnParameterBindingName] = result.Return;
}
