BAEL-3091: The Prototype Pattern in Java (changed code based on valid comments from a reader)

stripe/.gitignore

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+target/
+!.mvn/wrapper/maven-wrapper.jar
+
+### STS ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+
+### IntelliJ IDEA ###
+.idea
+*.iws
+*.iml
+*.ipr
+
+### NetBeans ###
+nbproject/private/
+build/
+nbbuild/
+dist/
+nbdist/
+.nb-gradle/
+
+###
+desktop.ini

stripe/README.md

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+### Stripe 
+
+This module contains articles about Stripe
+
+### Relevant articles
+
+- [Introduction to the Stripe API for Java](https://www.baeldung.com/java-stripe-api)
+

stripe/pom.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <groupId>com.baeldung.stripe</groupId>
+    <artifactId>stripe</artifactId>
+    <version>0.0.1-SNAPSHOT</version>
+    <name>stripe</name>
+    <description>Demo project for Stripe API</description>
+    <packaging>jar</packaging>
+
+    <parent>
+        <artifactId>parent-boot-1</artifactId>
+        <groupId>com.baeldung</groupId>
+        <version>0.0.1-SNAPSHOT</version>
+        <relativePath>../parent-boot-1</relativePath>
+    </parent>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-web</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-thymeleaf</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.projectlombok</groupId>
+            <artifactId>lombok</artifactId>
+            <version>${lombok.version}</version>
+            <!-- version is explicit here because the one provided with the current spring-boot-starter-parent has a bug in NetBeans; can be removed if spring-boot-starter-parent is 
+                upgraded -->
+        </dependency>
+        <dependency>
+            <groupId>com.stripe</groupId>
+            <artifactId>stripe-java</artifactId>
+            <version>${stripe.version}</version>
+        </dependency>
+    </dependencies>
+    
+    <properties>
+        <stripe.version>4.2.0</stripe.version>
+    </properties>
+
+</project>

stripe/src/main/java/com/baeldung/stripe/ChargeController.java

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+package com.baeldung.stripe;
+
+import com.baeldung.stripe.ChargeRequest.Currency;
+import com.stripe.exception.StripeException;
+import com.stripe.model.Charge;
+import lombok.extern.java.Log;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Controller;
+import org.springframework.ui.Model;
+import org.springframework.web.bind.annotation.ExceptionHandler;
+import org.springframework.web.bind.annotation.PostMapping;
+
+@Log
+@Controller
+public class ChargeController {
+
+    @Autowired
+    StripeService paymentsService;
+
+    @PostMapping("/charge")
+    public String charge(ChargeRequest chargeRequest, Model model) throws StripeException {
+        chargeRequest.setDescription("Example charge");
+        chargeRequest.setCurrency(Currency.EUR);
+        Charge charge = paymentsService.charge(chargeRequest);
+        model.addAttribute("id", charge.getId());
+        model.addAttribute("status", charge.getStatus());
+        model.addAttribute("chargeId", charge.getId());
+        model.addAttribute("balance_transaction", charge.getBalanceTransaction());
+        return "result";
+    }
+
+    @ExceptionHandler(StripeException.class)
+    public String handleError(Model model, StripeException ex) {
+        model.addAttribute("error", ex.getMessage());
+        return "result";
+    }
+}

stripe/src/main/java/com/baeldung/stripe/ChargeRequest.java

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+package com.baeldung.stripe;
+
+import lombok.Data;
+
+@Data
+public class ChargeRequest {
+
+    public enum Currency {
+        EUR, USD;
+    }
+    private String description;
+    private int amount; // cents
+    private Currency currency;
+    private String stripeEmail;
+    private String stripeToken;
+}

stripe/src/main/java/com/baeldung/stripe/CheckoutController.java

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+package com.baeldung.stripe;
+
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.stereotype.Controller;
+import org.springframework.ui.Model;
+import org.springframework.web.bind.annotation.RequestMapping;
+
+@Controller
+public class CheckoutController {
+
+    @Value("${STRIPE_PUBLIC_KEY}")
+    private String stripePublicKey;
+
+    @RequestMapping("/checkout")
+    public String checkout(Model model) {
+        model.addAttribute("amount", 50 * 100); // in cents
+        model.addAttribute("stripePublicKey", stripePublicKey);
+        model.addAttribute("currency", ChargeRequest.Currency.EUR);
+        return "checkout";
+    }
+}

stripe/src/main/java/com/baeldung/stripe/StripeApplication.java

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+package com.baeldung.stripe;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class StripeApplication {
+
+    public static void main(String[] args) {
+        SpringApplication.run(StripeApplication.class, args);
+    }
+}

stripe/src/main/java/com/baeldung/stripe/StripeService.java

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+package com.baeldung.stripe;
+
+import com.stripe.Stripe;
+import com.stripe.exception.APIConnectionException;
+import com.stripe.exception.APIException;
+import com.stripe.exception.AuthenticationException;
+import com.stripe.exception.CardException;
+import com.stripe.exception.InvalidRequestException;
+import com.stripe.model.Charge;
+import java.util.HashMap;
+import java.util.Map;
+import javax.annotation.PostConstruct;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.stereotype.Service;
+
+@Service
+public class StripeService {
+
+    @Value("${STRIPE_SECRET_KEY}")
+    String secretKey;
+
+    @PostConstruct
+    public void init() {
+        Stripe.apiKey = secretKey;
+    }
+
+    public Charge charge(ChargeRequest chargeRequest)
+            throws AuthenticationException, InvalidRequestException, APIConnectionException, CardException, APIException {
+        Map<String, Object> chargeParams = new HashMap<>();
+        chargeParams.put("amount", chargeRequest.getAmount());
+        chargeParams.put("currency", chargeRequest.getCurrency());
+        chargeParams.put("description", chargeRequest.getDescription());
+        chargeParams.put("source", chargeRequest.getStripeToken());
+        return Charge.create(chargeParams);
+    }
+}

stripe/src/main/resources/logback.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<configuration>
+    <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
+        <encoder>
+            <pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n
+            </pattern>
+        </encoder>
+    </appender>
+
+    <root level="INFO">
+        <appender-ref ref="STDOUT" />
+    </root>
+</configuration>

stripe/src/main/resources/static/index.html

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+<!DOCTYPE html>
+<html>
+    <head>
+        <meta http-equiv="refresh" content="0; url=/checkout.html" />
+    </head>
+    <body></body>
+</html>

stripe/src/main/resources/templates/checkout.html

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+<!DOCTYPE html>
+<html xmlns='http://www.w3.org/1999/xhtml' xmlns:th='http://www.thymeleaf.org'>
+    <head>
+        <title>Checkout</title>
+        <style>
+            body {
+                font-family: 'arial';
+            }
+            #checkout-form input,
+            #checkout-form button {
+                display: block;
+                margin: 12px;
+            }
+        </style>
+    </head>
+    <body>
+        <form action='/charge' method='POST' id='checkout-form'>
+            <input type='hidden' th:value='${amount}' name='amount' />
+            <label>Price:<span th:text='${amount/100}' /></label>
+            <!-- NOTE: data-key/data-amount/data-currency will be rendered by Thymeleaf -->
+            <script
+                src='https://checkout.stripe.com/checkout.js' 
+                class='stripe-button'
+                th:attr='data-key=${stripePublicKey},
+                         data-amount=${amount},
+                         data-currency=${currency}'
+                data-name='Baeldung'
+                data-description='Spring course checkout'
+                data-image='http://www.baeldung.com/wp-content/themes/baeldung/favicon/android-chrome-192x192.png'
+                data-locale='auto'
+                data-zip-code='false'>
+            </script>
+        </form>
+    </body>
+</html>

stripe/src/main/resources/templates/result.html

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+<!DOCTYPE html>
+<html xmlns='http://www.w3.org/1999/xhtml' xmlns:th='http://www.thymeleaf.org'>
+    <head>
+        <title>Result</title>
+    </head>
+    <body>
+        <h3 th:if='${error}' th:text='${error}' style='color: red;'></h3>
+        <div th:unless='${error}'>
+            <h3 style='color: green;'>Success!</h3>
+            <div>Id.: <span th:text='${id}' /></div>
+            <div>Status: <span th:text='${status}' /></div>
+            <div>Charge id.: <span th:text='${chargeId}' /></div>
+            <div>Balance transaction id.: <span th:text='${balance_transaction}' /></div>
+        </div>
+        <a href='/checkout.html'>Checkout again</a>
+    </body>
+</html>