Java 関数を使用すると、企業内の複雑なビジネス プロセスをどのように簡素化できるでしょうか?

import com.google.cloud.functions.HttpFunction;
import com.google.cloud.functions.HttpRequest;
import com.google.cloud.functions.HttpResponse;
import java.io.IOException;
import java.io.PrintWriter;

public class OrderProcessingFunction implements HttpFunction {
    @Override
    public void service(HttpRequest request, HttpResponse response)
            throws IOException {
        // 验证客户信息
        String customerInfo = request.getFirstQueryParameter("customerInfo").orElse("");
        boolean isValidCustomer = isValidCustomer(customerInfo);
        if (!isValidCustomer) {
            response.setStatusCode(400);
            return;
        }

        // 检查产品库存
        String productId = request.getFirstQueryParameter("productId").orElse("");
        int quantity = request.getFirstQueryParameter("quantity").orElse(0);
        boolean isAvailable = isAvailable(productId, quantity);
        if (!isAvailable) {
            response.setStatusCode(404);
            return;
        }

        // 计算运费
        String shippingAddress = request.getFirstQueryParameter("shippingAddress").orElse("");
        int shippingCost = calculateShippingCost(shippingAddress);

        // 发送订单确认邮件
        String emailAddress = request.getFirstQueryParameter("emailAddress").orElse("");
        sendEmailConfirmation(emailAddress);

        response.setContentType("text/plain");
        PrintWriter pw = new PrintWriter(response.getWriter());
        pw.write("Order processed successfully. Shipping cost: " + shippingCost);
    }
}