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Package notification
Short Description PHP implementation of Fowler's Notification pattern
License MIT
FAQ
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Informations about the package notification
Notification
PHP 5.3+ library to handle to replace throwing exceptions with notification in validations.
"If you're validating some data, you usually shouldn't be using exceptions to signal validation failures." -- Martin Fowler
Installation
This is installable via Composer as php-ddd/notification:
$ composer require php-ddd/notificationUsage
Suppose we have a code like this:
We want to avoid using Exception because the goal of this method is to know if we can validate the Purchase order, not
to validate it.
This kind of method should return a boolean value saying whether we can validate or not.
But returning a boolean without throwing exception means we loose information about why we can't purchase this order.
We can having both information by introducing the Notification pattern.
Bear in mind that this changes the behavior of your code. You should read Martin Fowler's blog article to see how you can do this without breaking your code.
Sometimes, you don't want to know why we cannot validate. So, creating the notification object is irrelevant for your context.
In this case, simply update your code like so:
