private async ValueTask ExecuteBufferedRequestBatchAsync(
CancellationToken cancellationToken)
{
// first we take all buffered requests and merge them into a single request.
// we however have to group requests by operation type. This means we should
// end up with one or two requests (query and mutation).
foreach ((IQueryRequest Merged, IEnumerable <BufferedRequest> Requests)batch in
MergeRequestHelper.MergeRequests(_bufferedRequests))
{
// now we take this merged request and run it against the executor.
IExecutionResult result = await _executor
.ExecuteAsync(batch.Merged, cancellationToken)
.ConfigureAwait(false);
if (result is IQueryResult queryResult)
{
// last we will extract the results for the original buffered requests
// and fulfil the promises.
MergeRequestHelper.DispatchResults(queryResult, batch.Requests);
}
else
{
// since we only support query/mutation at this point we will just fail
// in the event that something else was returned.
foreach (BufferedRequest request in batch.Requests)
{
request.Promise.SetException(new NotSupportedException(
"Only IQueryResult is supported when batching."));
}
}
}
}
public async Task Create_BufferedRequest_With_Mixed_Operations()
{
// arrange
ISchema schema =
await new ServiceCollection()
.AddGraphQL()
.AddCustomerSchema()
.BuildSchemaAsync();
var variableNames = new HashSet <string> {
"id"
};
var queryA = "query abc($id: ID) { customer(id: $id) { name } }";
var queryB = "query abc($id: ID) { customer(id: $id) { id } }";
var queryC = "mutation { createCustomer(input: { name: \"a\" }) { customer { id } } }";
IQueryRequest requestA =
QueryRequestBuilder.New()
.SetQuery(queryA)
.SetVariableValue("id", "1")
.Create();
IQueryRequest requestB =
QueryRequestBuilder.New()
.SetQuery(queryB)
.SetVariableValue("id", "1")
.Create();
IQueryRequest requestC =
QueryRequestBuilder.New()
.SetQuery(queryC)
.Create();
var bufferedRequestA = BufferedRequest.Create(requestA, schema);
var bufferedRequestB = BufferedRequest.Create(requestB, schema);
var bufferedRequestC = BufferedRequest.Create(requestC, schema);
// act
IEnumerable <(IQueryRequest, IEnumerable <BufferedRequest>)> mergeResult =
MergeRequestHelper.MergeRequests(new[]
{
bufferedRequestA,
bufferedRequestB,
bufferedRequestC
},
variableNames);
// assert
string.Join(Environment.NewLine + "-------" + Environment.NewLine,
mergeResult
.Select(t => t.Item1)
.Select(t => Utf8GraphQLParser.Parse(t.Query !.AsSpan()).ToString(true)))
.MatchSnapshot();
}
public async Task Merge_Requests_With_Variables_On_Directives()
{
// arrange
ISchema schema =
await new ServiceCollection()
.AddGraphQL()
.AddCustomerSchema()
.BuildSchemaAsync();
var queryA =
@"query abc($id: ID $if: Boolean) {
customer(id: $id) {
name @include(id: $if)
}
}";
var queryB =
@"query abc($id: ID $if: Boolean) {
customer(id: $id) {
id @include(id: $if)
}
}";
IQueryRequest requestA =
QueryRequestBuilder.New()
.SetQuery(queryA)
.SetVariableValue("id", "1")
.SetVariableValue("if", true)
.Create();
IQueryRequest requestB =
QueryRequestBuilder.New()
.SetQuery(queryB)
.SetVariableValue("id", "1")
.SetVariableValue("if", true)
.Create();
var bufferedRequestA = BufferedRequest.Create(requestA, schema);
var bufferedRequestB = BufferedRequest.Create(requestB, schema);
// act
IEnumerable <(IQueryRequest, IEnumerable <BufferedRequest>)> mergeResult =
MergeRequestHelper.MergeRequests(new[] { bufferedRequestA, bufferedRequestB });
// assert
string.Join(Environment.NewLine + "-------" + Environment.NewLine,
mergeResult
.Select(t => t.Item1)
.Select(t => Utf8GraphQLParser.Parse(t.Query !.AsSpan()).ToString(true)))
.MatchSnapshot();
}
public async Task Create_BufferedRequest_AutoGenerated()
{
// arrange
ISchema schema =
await new ServiceCollection()
.AddGraphQL()
.AddCustomerSchema()
.BuildSchemaAsync();
var queryA = "query abc($id: ID) { customer(id: $id) { name } }";
var queryB = "query abc($id: ID) { customer(id: $id) { id } }";
IQueryRequest requestA =
QueryRequestBuilder.New()
.SetQuery(queryA)
.SetVariableValue("id", "1")
.SetProperty(WellKnownContextData.IsAutoGenerated, true)
.Create();
IQueryRequest requestB =
QueryRequestBuilder.New()
.SetQuery(queryB)
.SetVariableValue("id", "1")
.SetProperty(WellKnownContextData.IsAutoGenerated, true)
.Create();
var bufferedRequestA = BufferedRequest.Create(requestA, schema);
var bufferedRequestB = BufferedRequest.Create(requestB, schema);
// act
IEnumerable <(IQueryRequest, IEnumerable <BufferedRequest>)> mergeResult =
MergeRequestHelper.MergeRequests(
new[] { bufferedRequestA, bufferedRequestB });
// assert
string.Join(Environment.NewLine + "-------" + Environment.NewLine,
mergeResult
.Select(t => t.Item1)
.Select(t => Utf8GraphQLParser.Parse(t.Query !.AsSpan()).ToString(true)))
.MatchSnapshot();
}