Query GetDefaultContent(FlowKey key)
{
var query = (Query)key.Type.New();
FlowContext.Bind(query, key);
return(query);
}
void BindFlow(TimelinePosition position)
{
_flow = ReadData();
FlowContext.Bind(_flow, _key, position, TimelinePosition.None);
_areaCheckpoint = position.ToInt64();
}
Task <FlowResumeInfo> StartAndResume()
{
var flow = _key.Type.New();
FlowContext.Bind(flow, _key);
return(Resume(flow));
}
Flow LoadFlow()
{
var flow = ReadInstance();
FlowContext.Bind(flow, _key, _metadata.Position, TimelinePosition.None);
return(flow);
}
public static T Bind <T>(this T query, Id instanceId) where T : Query
{
var queryType = query.GetType();
var areaMap = AreaMap.From(new[] { queryType });
AreaTypeName.TryFrom(queryType.Name, out var areaType);
var flowType = areaMap.GetFlow(areaType);
var subscriptionKey = FlowKey.From(flowType, instanceId);
FlowContext.Bind(query, subscriptionKey);
return(query);
}
Query GetCheckpointContent(FlowKey key, ResolvedEvent e)
{
var metadata = _context.ReadCheckpointMetadata(e);
if (metadata.ErrorPosition.IsSome)
{
throw new Exception($"Query is stopped at {metadata.ErrorPosition} with the following error: {metadata.ErrorMessage}");
}
var query = (Query)_context.Json.FromJsonUtf8(e.Event.Data, key.Type.DeclaredType);
FlowContext.Bind(query, key, metadata.Position, metadata.ErrorPosition);
return(query);
}
void StartIfFirst()
{
if (Observation.CanBeFirst)
{
Flow = (T)Key.Type.New();
FlowContext.Bind(Flow, Key);
}
else
{
if (!_queue.HasPoint)
{
CompleteTask(FlowResult.Ignored);
}
}
}
void StartFlowIfFirst()
{
if (Flow != null)
{
return;
}
if (Observation.CanBeFirst)
{
Flow = (T)Key.Type.New();
FlowContext.Bind(Flow, Key);
}
else
{
if (_queue.Count == 0)
{
CompleteTask(FlowResult.Ignored);
}
}
}
void CreateFlow()
{
Flow = (T)Key.Type.New();
FlowContext.Bind(Flow, Key);
}
void CreateFlow()
{
_flow = _key.Type.New();
FlowContext.Bind(_flow, _key);
}
