public DataPortalResult Fetch(Type objectType, object criteria, DataPortalContext context)
{
Thread t = new Thread(DoFetch);
FetchTask task = new FetchTask();
task.ObjectType = objectType;
task.Criteria = criteria;
task.Context = context;
t.Start(task);
t.Join();
return task.Result;
}
public DataPortalResult Fetch(Type objectType, object criteria, DataPortalContext context)
{
Thread t = new Thread(DoFetch);
FetchTask task = new FetchTask();
task.ObjectType = objectType;
task.Criteria = criteria;
task.Context = context;
t.Start(task);
t.Join();
return(task.Result);
}
void DoFetch(object state)
{
FetchTask task = null;
try
{
task = state as FetchTask;
if (task != null)
{
task.Result = Portal.Fetch(task.ObjectType, task.Criteria, task.Context);
}
}
catch (Exception ex)
{
if (task != null)
{
task.ResultException = ex;
}
}
}
public async Task <DataPortalResult> Fetch(Type objectType, object criteria, DataPortalContext context, bool isSync)
{
var task =
new FetchTask
{
ObjectType = objectType,
Criteria = criteria,
Context = context
};
if (isSync)
{
DoFetch(task);
}
else
{
await Task.Factory.StartNew(DoFetch, task);
}
if (task.ResultException != null)
{
throw task.ResultException;
}
return(task.Result);
}
public async Task<DataPortalResult> Fetch(Type objectType, object criteria, DataPortalContext context, bool isSync)
{
var task =
new FetchTask
{
ObjectType = objectType,
Criteria = criteria,
Context = context
};
if (isSync)
DoFetch(task);
else
await Task.Factory.StartNew(DoFetch, task);
if (task.ResultException != null)
throw task.ResultException;
return task.Result;
}
void DoFetch(object state)
{
FetchTask task = state as FetchTask;
task.Result = Portal.Fetch(task.ObjectType, task.Criteria, task.Context);
}
private void Visit(
OptimizerContext context,
ISelectionSet selectionSet,
IObjectType objectType,
FetchTask?parent)
{
if (!context.Processed.IsSupersetOf(selectionSet.Selections))
{
IReadOnlyList <IFetchConfiguration> configurations =
GetFetchConfigurations(objectType);
var tasks = new List <FetchTask>();
FetchTask?task = null;
foreach (IFetchConfiguration configuration in configurations)
{
if (configuration.CanHandleSelections(
context.Operation,
selectionSet,
objectType,
out IReadOnlyList <ISelection> handledSelections))
{
var current = new FetchTask(
new HashSet <ISelection>(handledSelections),
configuration,
parent?.Path.Push(parent) ?? ImmutableStack <FetchTask> .Empty,
tasks);
if (task is null || task.Selections.Count < handledSelections.Count)
{
task = current;
}
tasks.Add(current);
}
}
if (task is not null)
{
tasks.Remove(task);
foreach (ISelection handledSelection in task.Selections)
{
context.Processed.Add(handledSelection);
}
if (parent is null)
{
context.QueryPlan.Add(task);
}
else
{
parent.Children.Add(task);
}
parent = task;
}
}
foreach (ISelection selection in selectionSet.Selections)
{
Visit(context, selection, parent);
}
}
