The project demonstrates the modes of message communication in the Actor model.
The project uses the Akka framework running under Java.
mvn compile exec:exec
This GitHub project shows how to implement the Actor Model as a simple shopping cart for Jill’s Juice, a fictitious e-commerce company that sells a variety of gourmet juices. The implementation uses the Akka framework under Java.
The shopping cart is represented by an actor called the ShoppingCartActor. The client that sends messages into the ShoppingCartActor is a controller actor called App.
The App actor sends a fire-and-forget AddItems message that describes a set of items to add to the ShoppingCartActor. Another fire-and-forget message named CheckoutInfo describes the checkout information required to execute checkout behavior within the ShoppingCartActor. Sending a CheckoutInfo to the ShoppingCartActor instigates the checkout process. (See Figure 2, callout 1.)
The checkout process within the ShoppingCartActor sends a response message to the PaymentActor which processes payment and returns a response. (See Figure 2, callout 2a.) After the PaymentActor processes payment it sends a fire-and-forget PaymentReceipt message to the CustomerActor. (See Figure 2, callout 3a.)
After payment is made and acknowledged by a response from the PaymentActor, the ShoppingCartActor sends a ShippingInfo message to the ShippingActor. (See Figure 2, call out 2b.) The ShippingActor ships the items described in the ShippingInfo message. The ShippingActor responds to the ShoppingCartActor letting it know that shipment has executed. Also, the ShippingActor sends a fire-and-forget ShippingReceipt message to the CustomerActor to inform the customer that the items have shipped. (See Figure 2, callout 3b.)