PHP
Commands and Domain Events
As you advance in your career, you'll quickly fall into the "sequential tasks" trap. "I need to do these ten things when a user signs up.... but I have no idea where to place this logic." Many times, we give up and simply throw it in the controller. But is that the best place? Might there be a better way (when appropriate) to structure our applications? Sure! Let me show you.
Difficulty
This series has been archived.
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In the opening episode, we'll review the "sequential tasks" dilemma, while introducing the concept of command objects.
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The Command Bus
Run Time 8:34Now that we have our first command object, we next need to calculate the appropriate handler class, which will delegate, as needed. Let's tackle that in this episode. Go sports!
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Command Handlers
Run Time 15:32So we've successfully translated a command into its associated handler class. In this lesson, we'll delegate, as needed, to post the job listing - while raising domain events in the process.
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Clean Event Listeners
Run Time 15:00So, we've learned how to dispatch our custom events, but how do we go about listening for them? Well, in this lesson, I'll show you a really nice and clean way to go about it! Let's do this.
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Usage Recap
Run Time 7:18Now that our base is essentially complete, let's go through the process of, using our job site example, marking jobs as filled, or archived.
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Validation and Decorators
Run Time 12:23In this lesson, we'll extend the functionality of the command bus by adding a validation decorator, while also reviewing an implementation that uses simple inheritance.
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Extracting a Composer Package
Run Time 9:10Now that our review of commands and domain events is complete, let's extract a Composer package, so that we can reuse this logic across all new projects! See the completed package on GitHub!
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