org.springsource.restbucks.payment.PaymentServiceImpl.java Source code

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Here is the source code for org.springsource.restbucks.payment.PaymentServiceImpl.java

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/*
 * Copyright 2012-2016 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.springsource.restbucks.payment;

import lombok.NonNull;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.ApplicationEventPublisher;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import org.springsource.restbucks.order.Order;
import org.springsource.restbucks.order.OrderRepository;
import org.springsource.restbucks.payment.Payment.Receipt;

import java.util.Optional;

/**
 * Implementation of {@link PaymentService} delegating persistence operations to {@link PaymentRepository} and
 * {@link CreditCardRepository}.
 *
 * @author Oliver Gierke
 * @author Stphane Nicoll
 */
@Service
@Transactional
class PaymentServiceImpl implements PaymentService {

    private final @NonNull CreditCardRepository creditCardRepository;
    private final @NonNull PaymentRepository paymentRepository;
    private final @NonNull OrderRepository orderRepository;
    private final @NonNull ApplicationEventPublisher publisher;

    @Autowired
    public PaymentServiceImpl(final CreditCardRepository creditCardRepository,
            final PaymentRepository paymentRepository, final OrderRepository orderRepository,
            final ApplicationEventPublisher publisher) {
        this.creditCardRepository = creditCardRepository;
        this.paymentRepository = paymentRepository;
        this.orderRepository = orderRepository;
        this.publisher = publisher;
    }

    /*
     * (non-Javadoc)
     * @see org.springsource.restbucks.payment.PaymentService#pay(org.springsource.restbucks.order.Order, org.springsource.restbucks.payment.Payment)
     */
    @Override
    public CreditCardPayment pay(Order order, CreditCardNumber creditCardNumber) {

        if (order.isPaid()) {
            throw new PaymentException(order, "Order already paid!");
        }

        // Using Optional.orElseThrow() doesn't work due to https://bugs.openjdk.java.net/browse/JDK-8054569
        Optional<CreditCard> creditCardResult = creditCardRepository.findByNumber(creditCardNumber);

        if (!creditCardResult.isPresent()) {
            throw new PaymentException(order,
                    String.format("No credit card found for number: %s", creditCardNumber.getNumber()));
        }

        CreditCard creditCard = creditCardResult.get();

        if (!creditCard.isValid()) {
            throw new PaymentException(order, String.format("Invalid credit card with number %s, expired %s!",
                    creditCardNumber.getNumber(), creditCard.getExpirationDate()));
        }

        order.markPaid();
        CreditCardPayment payment = paymentRepository.save(new CreditCardPayment(creditCard, order));

        publisher.publishEvent(new OrderPaidEvent(order.getId()));

        return payment;
    }

    /*
     * (non-Javadoc)
     * @see org.springsource.restbucks.payment.PaymentService#getPaymentFor(org.springsource.restbucks.order.Order)
     */
    @Override
    @Transactional(readOnly = true)
    public Optional<Payment> getPaymentFor(Order order) {
        return paymentRepository.findByOrder(order);
    }

    /*
     * (non-Javadoc)
     * @see org.springsource.restbucks.payment.PaymentService#takeReceiptFor(org.springsource.restbucks.order.Order)
     */
    @Override
    public Optional<Receipt> takeReceiptFor(Order order) {

        order.markTaken();
        orderRepository.save(order);

        return getPaymentFor(order).map(Payment::getReceipt);
    }
}