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Automate This: Chapter 13: Payment Processing with Interfaces and Composition
Welcome to Automate This! 🎙️
This podcast started as a little life hack for myself—a way to skip re-reading my own blog posts and instead listen to them on the go. Crafted using NotebookLM, it’s a personal productivity experiment that quickly evolved into something worth sharing!
Born from the blog Automate This (medium.com/@automatethis), this podcast turns complex topics into bite-sized, fun, and interactive episodes. Whether it's mastering Java, Selenium, Appium, or GitHub—or diving into automation solutions for payment systems and fintech applications—we make it sound easy (and sometimes even funny).
Tune in while driving, cooking, or juggling spreadsheets. Automate This is here to save you time, sharpen your automation skills, and make your downtime productive. Who knew staying on top of tech could be this effortless?
đź“Ś For the best experience, check out the blog and repo links included in each post.
Grab your headphones, hit play, and let’s automate your world, one clever trick at a time! 🚀
Code Snippet:
==============================================
// Interface: Defines the contract for all payment methods
interface Payment {
void process(double amount); // Every payment type must implement this
}
// CreditCardPayment: Implements the payment interface
class CreditCardPayment implements Payment {
@Override
public void process(double amount) {
System.out.println("Processing credit card payment of $" + amount);
}
}
// PayPalPayment: Implements the payment interface
class PayPalPayment implements Payment {
@Override
public void process(double amount) {
System.out.println("Processing PayPal payment of $" + amount);
}
}
// PaymentService: User-facing service to initiate payments
class PaymentService {
private Payment payment; // Holds a reference to the Payment interface
PaymentService(Payment payment) {
this.payment = payment; // Inject specific payment type
}
void makePayment(double amount) {
payment.process(amount); // Delegate processing to the implementation
}
}
public class Main {
public static void main(String[] args) {
// Using Credit Card payment
PaymentService service = new PaymentService(new CreditCardPayment());
service.makePayment(100.00);
// Using PayPal payment
service = new PaymentService(new PayPalPayment());
service.makePayment(200.50);
}
}
interface Payment {
void process(double amount); // Every payment type must implement this
}
// CreditCardPayment: Implements the payment interface
class CreditCardPayment implements Payment {
@Override
public void process(double amount) {
System.out.println("Processing credit card payment of $" + amount);
}
}
// PayPalPayment: Implements the payment interface
class PayPalPayment implements Payment {
@Override
public void process(double amount) {
System.out.println("Processing PayPal payment of $" + amount);
}
}
// PaymentService: User-facing service to initiate payments
class PaymentService {
private Payment payment; // Holds a reference to the Payment interface
PaymentService(Payment payment) {
this.payment = payment; // Inject specific payment type
}
void makePayment(double amount) {
payment.process(amount); // Delegate processing to the implementation
}
}
public class Main {
public static void main(String[] args) {
// Using Credit Card payment
PaymentService service = new PaymentService(new CreditCardPayment());
service.makePayment(100.00);
// Using PayPal payment
service = new PaymentService(new PayPalPayment());
service.makePayment(200.50);
}
}
==============================================
// Abstract Class: Provides shared functionality and a structure
abstract class AbstractPayment {
void validatePayment() {
System.out.println("Validating payment details...");
}
abstract void process(double amount); // Subclasses must implement this
}
// CreditCardPayment: Extends AbstractPayment
class CreditCardPayment extends AbstractPayment {
@Override
void process(double amount) {
validatePayment(); // Reuse common functionality
System.out.println("Processing credit card payment of $" + amount);
}
}
// PayPalPayment: Extends AbstractPayment
class PayPalPayment extends AbstractPayment {
@Override
void process(double amount) {
validatePayment(); // Reuse common functionality
System.out.println("Processing PayPal payment of $" + amount);
}
}
abstract class AbstractPayment {
void validatePayment() {
System.out.println("Validating payment details...");
}
abstract void process(double amount); // Subclasses must implement this
}
// CreditCardPayment: Extends AbstractPayment
class CreditCardPayment extends AbstractPayment {
@Override
void process(double amount) {
validatePayment(); // Reuse common functionality
System.out.println("Processing credit card payment of $" + amount);
}
}
// PayPalPayment: Extends AbstractPayment
class PayPalPayment extends AbstractPayment {
@Override
void process(double amount) {
validatePayment(); // Reuse common functionality
System.out.println("Processing PayPal payment of $" + amount);
}
}
View all episodes
By Mrigank Shubham SaxenaWelcome to Automate This! 🎙️
This podcast started as a little life hack for myself—a way to skip re-reading my own blog posts and instead listen to them on the go. Crafted using NotebookLM, it’s a personal productivity experiment that quickly evolved into something worth sharing!
Born from the blog Automate This (medium.com/@automatethis), this podcast turns complex topics into bite-sized, fun, and interactive episodes. Whether it's mastering Java, Selenium, Appium, or GitHub—or diving into automation solutions for payment systems and fintech applications—we make it sound easy (and sometimes even funny).
Tune in while driving, cooking, or juggling spreadsheets. Automate This is here to save you time, sharpen your automation skills, and make your downtime productive. Who knew staying on top of tech could be this effortless?
đź“Ś For the best experience, check out the blog and repo links included in each post.
Grab your headphones, hit play, and let’s automate your world, one clever trick at a time! 🚀
Code Snippet:
==============================================
// Interface: Defines the contract for all payment methods
interface Payment {
void process(double amount); // Every payment type must implement this
}
// CreditCardPayment: Implements the payment interface
class CreditCardPayment implements Payment {
@Override
public void process(double amount) {
System.out.println("Processing credit card payment of $" + amount);
}
}
// PayPalPayment: Implements the payment interface
class PayPalPayment implements Payment {
@Override
public void process(double amount) {
System.out.println("Processing PayPal payment of $" + amount);
}
}
// PaymentService: User-facing service to initiate payments
class PaymentService {
private Payment payment; // Holds a reference to the Payment interface
PaymentService(Payment payment) {
this.payment = payment; // Inject specific payment type
}
void makePayment(double amount) {
payment.process(amount); // Delegate processing to the implementation
}
}
public class Main {
public static void main(String[] args) {
// Using Credit Card payment
PaymentService service = new PaymentService(new CreditCardPayment());
service.makePayment(100.00);
// Using PayPal payment
service = new PaymentService(new PayPalPayment());
service.makePayment(200.50);
}
}
interface Payment {
void process(double amount); // Every payment type must implement this
}
// CreditCardPayment: Implements the payment interface
class CreditCardPayment implements Payment {
@Override
public void process(double amount) {
System.out.println("Processing credit card payment of $" + amount);
}
}
// PayPalPayment: Implements the payment interface
class PayPalPayment implements Payment {
@Override
public void process(double amount) {
System.out.println("Processing PayPal payment of $" + amount);
}
}
// PaymentService: User-facing service to initiate payments
class PaymentService {
private Payment payment; // Holds a reference to the Payment interface
PaymentService(Payment payment) {
this.payment = payment; // Inject specific payment type
}
void makePayment(double amount) {
payment.process(amount); // Delegate processing to the implementation
}
}
public class Main {
public static void main(String[] args) {
// Using Credit Card payment
PaymentService service = new PaymentService(new CreditCardPayment());
service.makePayment(100.00);
// Using PayPal payment
service = new PaymentService(new PayPalPayment());
service.makePayment(200.50);
}
}
==============================================
// Abstract Class: Provides shared functionality and a structure
abstract class AbstractPayment {
void validatePayment() {
System.out.println("Validating payment details...");
}
abstract void process(double amount); // Subclasses must implement this
}
// CreditCardPayment: Extends AbstractPayment
class CreditCardPayment extends AbstractPayment {
@Override
void process(double amount) {
validatePayment(); // Reuse common functionality
System.out.println("Processing credit card payment of $" + amount);
}
}
// PayPalPayment: Extends AbstractPayment
class PayPalPayment extends AbstractPayment {
@Override
void process(double amount) {
validatePayment(); // Reuse common functionality
System.out.println("Processing PayPal payment of $" + amount);
}
}
abstract class AbstractPayment {
void validatePayment() {
System.out.println("Validating payment details...");
}
abstract void process(double amount); // Subclasses must implement this
}
// CreditCardPayment: Extends AbstractPayment
class CreditCardPayment extends AbstractPayment {
@Override
void process(double amount) {
validatePayment(); // Reuse common functionality
System.out.println("Processing credit card payment of $" + amount);
}
}
// PayPalPayment: Extends AbstractPayment
class PayPalPayment extends AbstractPayment {
@Override
void process(double amount) {
validatePayment(); // Reuse common functionality
System.out.println("Processing PayPal payment of $" + amount);
}
}