dvdstelt/eventualconsistencydemo

Demo for Eventual Consistency presentation

Hello there 👋

Dennis is a contractor, with specializations as a software developer, solution architect, trainer/coach, and international speaker at conferences. More information can be found on compilesoftware.nl

Currently working for Particular Software, makers of NServiceBus.

You can reach him at [email protected] or Twitter/X and LinkedIn.

eventualconsistencydemo's Issues

Load HTML view on order confirmation

When the response message returns and the SignalR message is formed, it's full of HTML. Instead, return an object and have some javascript (not inside Movie.cshtml as currently is) load an HTML view or something and display the confirmation using that.

Interesting is how the Game of Thrones reservation should be loaded without the code having too much knowledge about the fact it's a different type of reservation.

Document NServiceBus behaviors for adding SignalR identifier to message headers

Document in a GitHub markdown file in this repo how the communication identifiers for SignalR are added to the message headers.

SignalR messages for ordered movie arrive at every client

Problem Description

Currently the SignalR implementation broadcasts messages to every single connected client. It should only send messages to the original client.

Introduce LiteDb as database

Introduce LiteDb as document database for the demo.

The criteria for a possible database were

• Absolutely no installation of any kind.
• Preferable a single database file
• Location of the database under solution folder
• Shareable across different processes
  • Web Application
  • Background processes like NServiceBus endpoints

Out of scope

• Store reviews in the database that are also stored in local storage
  Don't want to complicate iterating over local storage by searching for reviews that were already added. Simply removing them using the Clear LocalStorage button is what we want to keep

Plan of Action

• Introduce LiteDb into code using DI
• Store movies in the database
• Possibly store reviews from ReviewsContext in database and alternate between user profiles
  Might not be necessary, still possible to load those from simple collection
• Store order in the database and make it retrievable

Lottery reservation waits for async messages to confirm reservation

Problem Description

Currently when registering for a lottery the system waits for the request/response messages to confirm the registration. Instead it should immediately return after sending the request and not wait for a confirmation response message.

Goals

• Ability to turn off the NServiceBus endpoint and the reservation is still confirmed to end-user