Skip to main content

MassTransit–Minimal Message Handlers

By default message handling in MassTransit is done through Consumers. A consumer consumes one or more message types when configured on or connected to a receive endpoint. MassTransit includes many consumer types, including consumers, sagas, saga state machines, routing slip activities, handlers, and job consumers.

With the upcoming 8.1 release, an extra way to handle messages will be "Minimal Message Handlers". Instead of defining a separate Consumer class, a function is provided to handle a given message type, in the trend of the "minimal APIs" feature in ASP.NET Core.

To use this feature, you need to use the AddHandler method on the IBusRegistrationConfigurator:

Of course in this example there is not much happening. Let us extend the example above and log the incoming request message. To inject extra dependencies, we can specify them as extra parameters to the method:

Instead of passing the message directly, we can also use the ConsumeContext to access the message metadata:

If you want to learn more about Minimal Message Handlers, check out this video:

Popular posts from this blog

DevToys–A swiss army knife for developers

As a developer there are a lot of small tasks you need to do as part of your coding, debugging and testing activities.  DevToys is an offline windows app that tries to help you with these tasks. Instead of using different websites you get a fully offline experience offering help for a large list of tasks. Many tools are available. Here is the current list: Converters JSON <> YAML Timestamp Number Base Cron Parser Encoders / Decoders HTML URL Base64 Text & Image GZip JWT Decoder Formatters JSON SQL XML Generators Hash (MD5, SHA1, SHA256, SHA512) UUID 1 and 4 Lorem Ipsum Checksum Text Escape / Unescape Inspector & Case Converter Regex Tester Text Comparer XML Validator Markdown Preview Graphic Color B

Help! I accidently enabled HSTS–on localhost

I ran into an issue after accidently enabling HSTS for a website on localhost. This was not an issue for the original website that was running in IIS and had a certificate configured. But when I tried to run an Angular app a little bit later on http://localhost:4200 the browser redirected me immediately to https://localhost . Whoops! That was not what I wanted in this case. To fix it, you need to go the network settings of your browser, there are available at: chrome://net-internals/#hsts edge://net-internals/#hsts brave://net-internals/#hsts Enter ‘localhost’ in the domain textbox under the Delete domain security policies section and hit Delete . That should do the trick…

Azure DevOps/ GitHub emoji

I’m really bad at remembering emoji’s. So here is cheat sheet with all emoji’s that can be used in tools that support the github emoji markdown markup: All credits go to rcaviers who created this list.