jplane / durablestatemachines Goto Github PK

Need to be simpler and more terse

Model metadata is currently hardcoded to support SCXML. We want to abstract this into a proper C# interface so that we can store metadata in other formats/locations:

• JSON
• cloud storage
• SQL
• etc.

There are abstractions for defining state chart metadata here.

There's an XML-based implementation that adheres to the SCXML spec here.

XML kind of sucks :-) so it would be nice to implement a fluent object model for defining metadata.

https://docs.microsoft.com/en-us/aspnet/core/blazor/?view=aspnetcore-5.0

https://devblogs.microsoft.com/dotnet/configureawait-faq/

It would be lovely to define a standard protocol for any SCXML-compliant statechart implementation to implement, for providing telemetry for logging and visualization.

This would allow folks to build various kinds of viz/debuggers/recorders etc. and use whatever backend with them.

The SendMessage operation is stubbed out but not yet implemented.

We'd like a few things here:

• a standard HTTP send message implementation (should handle HTTP verbs, query strings, body payloads, etc.)
• a means for users to configure their own send message implementations prior to execution, probably using an ExecutionContext hook
  • probably need to add interface(s) to the abstractions assembly
  • this could include replacing the standard HTTP implementation with something better
• needs to work for both in-proc and durable task implementations

This is stubbed out but not yet implemented.

• needs to adhere to the spec
• the durable task implementation should use built-in mechanisms

There are abstractions for defining state chart metadata here.

There's an XML-based implementation that adheres to the SCXML spec here.

XML kind of sucks :-) so it would be nice to implement a JSON-based provider. Bonus points for defining a JSON schema that honors the SCXML spec and that we can share with other implementations.

Based on this https://docs.microsoft.com/en-us/azure/azure-functions/functions-custom-handlers

Need to thread a CancellationToken so that we can shutdown the engine when needed.

Events should match on prefixes, per the SCXML spec

Implement IModelMetadata.Validate() for XML and Fluent APIs