/// <summary>
/// Submits the GraphQL query for processing.
/// </summary>
/// <param name="queryData">The query data.</param>
/// <returns>Task<IActionResult>.</returns>
public virtual async Task SubmitGraphQLQuery(GraphQueryData queryData)
{
// ensure data was received
if (queryData == null || string.IsNullOrWhiteSpace(queryData.Query))
{
await this.WriteStatusCodeResponse(HttpStatusCode.BadRequest, ERROR_NO_QUERY_PROVIDED).ConfigureAwait(false);
return;
}
using (var cancelSource = new CancellationTokenSource())
{
try
{
// *******************************
// Setup
// *******************************
this.GraphQLRequest = this.CreateRequest(queryData);
if (this.GraphQLRequest == null)
{
await this.WriteStatusCodeResponse(HttpStatusCode.InternalServerError, ERROR_NO_REQUEST_CREATED).ConfigureAwait(false);
return;
}
// *******************************
// Primary query execution
// *******************************
var metricPackage = this.EnableMetrics ? _metricsFactory.CreateMetricsPackage() : null;
var context = new GraphQueryExecutionContext(
this.GraphQLRequest,
this.HttpContext.RequestServices,
this.HttpContext.User,
metricPackage,
_logger);
await _queryPipeline.InvokeAsync(context, cancelSource.Token).ConfigureAwait(false);
// *******************************
// Response Generation
// *******************************
var queryResponse = context.Result;
if (queryResponse == null)
{
queryResponse = this.ErrorMessageAsGraphQLResponse(ERROR_NO_RESPONSE);
}
// if any metrics were populated in the execution, allow a child class to process them
if (context.Metrics != null)
{
this.HandleQueryMetrics(context.Metrics);
}
// all done, finalize and return
queryResponse = this.FinalizeResult(queryResponse);
await this.WriteResponse(queryResponse).ConfigureAwait(false);
}
catch (Exception ex)
{
var exceptionResult = this.HandleQueryException(ex);
if (exceptionResult == null)
{
// no one was able to handle hte exception. Log it if able and just fail out to the caller
_logger?.UnhandledExceptionEvent(ex);
await this.WriteStatusCodeResponse(HttpStatusCode.InternalServerError, ERROR_INTERNAL_SERVER_ISSUE).ConfigureAwait(false);
}
else
{
await this.WriteResponse(exceptionResult).ConfigureAwait(false);
}
}
}
}
/// <inheritdoc />
public IGraphQueryExecutionMetrics CreateMetricsPackage()
{
return(_metricsFactory?.CreateMetricsPackage());
}