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What is use of observer in magento2?
Observers are a certain type of Magento class that can influence general behavior, performance, or change business logic. Observers are executed whenever the event they are configured to watch is dispatched by the event manager.
What is event and observer in magento2?
Working with events and observers is one of the ways to extend the core functionalities of the Magento Platform. Magento 2 provides the same events and observers customization options as Magento 1. The implementation of the events and observers in Magento 2 is based on the Publish-Subscribe pattern.
How are events and observers implemented in Magento 2?
The events and observers implementation in Magento 2 is based on the publish-subscribe pattern. Using events and observers, you can run your custom code in response to a specific Magento event or even a custom event. Events are dispatched by modules when certain actions are triggered.
How to get customer information from order Magento 2?
As per as,magento2 standard,you can inject Sales Collection Factory class,Then Filter that collection by Customer id. But this is not recommended. Use repository. With $order you can do $customer is an instance of Magento\\Customer\\Model\\Data\\Customer, just call its get () methods to access customer properties.
How is an event dispatched in Magento framework?
When an event is dispatched, it can pass data to any observers configured to watch that event. Events can be dispatched using the Magento\\Framework\\Event\\ManagerInterface class.
Can you have two observers with the same name?
Observer names must be unique per event definition. This means that you cannot have two observers with the same name in the same event definition. In the example, both observers have the name myObserverName. This is acceptable because each of those observers belong to different event definitions.