public FieldHelper(
FieldCollector fieldCollector,
DirectiveLookup directives,
IVariableCollection variables,
ICollection <IError> errors)
{
if (directives == null)
{
throw new ArgumentNullException(nameof(directives));
}
if (variables == null)
{
throw new ArgumentNullException(nameof(variables));
}
if (errors == null)
{
throw new ArgumentNullException(nameof(errors));
}
_fieldCollector = fieldCollector;;
_errors = errors;
_directives = directives;
}
public OperationExecuter(
ISchema schema,
DocumentNode queryDocument,
OperationDefinitionNode operation)
{
_schema = schema
?? throw new ArgumentNullException(nameof(schema));
_queryDocument = queryDocument
?? throw new ArgumentNullException(nameof(queryDocument));
_operation = operation
?? throw new ArgumentNullException(nameof(operation));
_executionTimeout = schema.Options.ExecutionTimeout;
_variableValueBuilder = new VariableValueBuilder(schema, _operation);
if (!_executionStrategy.TryGetValue(_operation.Operation,
out IExecutionStrategy strategy))
{
throw new NotSupportedException();
}
_strategy = strategy;
var directiveCollector = new DirectiveCollector(_schema);
directiveCollector.VisitDocument(_queryDocument);
_directiveLookup = directiveCollector.CreateLookup();
}
private static IFieldHelper CreateFieldHelper(
IVariableCollection variables,
FragmentCollection fragments,
DirectiveLookup directives,
ICollection <IError> errors)
{
var fieldCollector = new FieldCollector(
variables, fragments);
return(new FieldHelper(
fieldCollector, directives,
variables, errors));
}
private IExecutionContext CreateExecutionContext(IQueryContext context)
{
DirectiveLookup directives = GetOrCreateDirectiveLookup(context);
return(new ExecutionContext(
context.Schema,
context.ServiceScope,
context.Operation,
context.Variables,
directives,
context.ContextData,
context.RequestAborted));
}
public ExecutionContext(
ISchema schema,
DirectiveLookup directiveLookup,
DocumentNode queryDocument,
OperationDefinitionNode operation,
OperationRequest request,
VariableCollection variables,
CancellationToken cancellationToken)
{
if (request == null)
{
throw new ArgumentNullException(nameof(request));
}
Schema = schema
?? throw new ArgumentNullException(nameof(schema));
_directiveLookup = directiveLookup
?? throw new ArgumentNullException(nameof(directiveLookup));
QueryDocument = queryDocument
?? throw new ArgumentNullException(nameof(queryDocument));
Operation = operation
?? throw new ArgumentNullException(nameof(operation));
Variables = variables
?? throw new ArgumentNullException(nameof(variables));
Services = _serviceFactory.Services = request.Services;
_session = request.Session;
_resolverCache = request.Session?.CustomContexts
.GetCustomContext <IResolverCache>();
Fragments = new FragmentCollection(schema, queryDocument);
_fieldCollector = new FieldCollector(variables, Fragments);
OperationType = schema.GetOperationType(operation.Operation);
RootValue = ResolveRootValue(request.Services, schema,
OperationType, request.InitialValue);
if (RootValue == null)
{
RootValue = CreateRootValue(Services, schema, OperationType);
_disposeRootValue = true;
}
CancellationToken = cancellationToken;
_clone = c => new ExecutionContext(
schema, directiveLookup, queryDocument,
operation, CreateOperationRequest(
schema, request.VariableValues,
request.InitialValue),
variables, c);
}
public void CloneExecutionContext()
{
// arrange
var schema = Schema.Create(
"type Query { foo: String }",
c => c.Use(next => context => Task.CompletedTask));
var query = Parser.Default.Parse("{ foo }");
var errorHandler = new Mock <IErrorHandler>();
var services = new Mock <IServiceProvider>();
services.Setup(t => t.GetService(typeof(IErrorHandler)))
.Returns(errorHandler.Object);
IRequestServiceScope serviceScope = services.Object
.CreateRequestServiceScope();
var operation = new Mock <IOperation>();
operation.Setup(t => t.Query).Returns(query);
var variables = new Mock <IVariableCollection>();
var directives = new DirectiveLookup(new Dictionary <ObjectType, IDictionary <FieldNode, IReadOnlyCollection <IDirective> > >());
var contextData = new Dictionary <string, object>
{
{ "abc", "123" }
};
// act
var executionContext = new ExecutionContext(
schema, serviceScope, operation.Object,
variables.Object, directives, contextData,
CancellationToken.None);
IExecutionContext cloned = executionContext.Clone();
// assert
Assert.Equal(contextData, executionContext.ContextData);
Assert.Equal(contextData, cloned.ContextData);
Assert.False(object.ReferenceEquals(
executionContext.Result, cloned.Result));
Assert.False(object.ReferenceEquals(
executionContext.ContextData, cloned.ContextData));
}
private IExecutionContext CreateExecutionContext(IQueryContext context)
{
DirectiveLookup directiveLookup = _directiveCache.GetOrCreate(
context.Request.Query,
() => CreateLookup(context.Schema, context.Document));
OperationRequest request = CreateOperationRequest(context);
VariableCollection variables = CoerceVariables(
context.Schema, context.Operation,
request.VariableValues);
var executionContext = new ExecutionContext(
context.Schema, directiveLookup, context.Document,
context.Operation, request, variables,
context.RequestAborted);
return(executionContext);
}
public ExecutionContext(
ISchema schema,
DirectiveLookup directiveLookup,
DocumentNode queryDocument,
OperationDefinitionNode operation,
OperationRequest request,
VariableCollection variables,
CancellationToken requestAborted)
{
Schema = schema
?? throw new ArgumentNullException(nameof(schema));
_directiveLookup = directiveLookup
?? throw new ArgumentNullException(nameof(directiveLookup));
QueryDocument = queryDocument
?? throw new ArgumentNullException(nameof(queryDocument));
Operation = operation
?? throw new ArgumentNullException(nameof(operation));
Variables = variables
?? throw new ArgumentNullException(nameof(variables));
_request = request
?? throw new ArgumentNullException(nameof(request));
Services = _serviceFactory.Services = request.Services;
_resolverCache = request.Session?.CustomContexts
.GetCustomContext <IResolverCache>();
ErrorHandler = Services.GetRequiredService <IErrorHandler>();
Fragments = new FragmentCollection(schema, queryDocument);
_fieldCollector = new FieldCollector(variables, Fragments);
OperationType = schema.GetOperationType(operation.Operation);
RootValue = ResolveRootValue(request.Services, schema,
OperationType, request.InitialValue);
if (RootValue == null)
{
RootValue = CreateRootValue(Services, schema, OperationType);
_disposeRootValue = true;
}
RequestAborted = requestAborted;
}
public ExecutionContext(
ISchema schema,
IRequestServiceScope serviceScope,
IOperation operation,
IVariableCollection variables,
DirectiveLookup directives,
IDictionary <string, object> contextData,
CancellationToken requestAborted)
{
Schema = schema
?? throw new ArgumentNullException(nameof(schema));
ServiceScope = serviceScope
?? throw new ArgumentNullException(nameof(serviceScope));
Operation = operation
?? throw new ArgumentNullException(nameof(operation));
Variables = variables
?? throw new ArgumentNullException(nameof(variables));
Directives = directives
?? throw new ArgumentNullException(nameof(directives));
ContextData = contextData
?? throw new ArgumentNullException(nameof(contextData));
RequestAborted = requestAborted;
ErrorHandler = serviceScope.ServiceProvider
.GetRequiredService <IErrorHandler>();
Result = new QueryResult();
FieldHelper = CreateFieldHelper(
variables,
new FragmentCollection(schema, operation.Query),
directives,
Result.Errors);
Activator = new Activator(serviceScope.ServiceProvider);
}