com.acmeair.jpa.service.BookingServiceImpl.java Source code

Introduction

Here is the source code for com.acmeair.jpa.service.BookingServiceImpl.java

Source

/*******************************************************************************
* Copyright (c) 2013 IBM Corp.
*
* 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 com.acmeair.jpa.service;

import java.util.Date;
import java.util.List;

import javax.annotation.Resource;
import javax.persistence.EntityManager;
import javax.persistence.Query;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Propagation;
import org.springframework.transaction.annotation.Transactional;

import com.acmeair.entities.Booking;
import com.acmeair.entities.BookingPK;
import com.acmeair.entities.Customer;
import com.acmeair.entities.Flight;
import com.acmeair.entities.FlightPK;
import com.acmeair.service.BookingService;
import com.acmeair.service.CustomerService;
import com.acmeair.service.FlightService;
import com.acmeair.service.KeyGenerator;

@Service("bookingService")
public class BookingServiceImpl implements BookingService {

    @Autowired
    EntityManager em;

    @Resource
    FlightService flightService;

    @Resource
    CustomerService customerService;

    @Resource
    KeyGenerator keyGenerator;

    @Transactional(propagation = Propagation.REQUIRED)
    @Override
    public BookingPK bookFlight(String customerId, FlightPK flightId) {
        try {
            // We still delegate to the flight and customer service for the map
            // access than getting the map instance directly
            Flight f = flightService.getFlightByFlightKey(flightId);
            Customer c = customerService.getCustomerByUsername(customerId);

            Booking newBooking = new Booking(keyGenerator.generate().toString(), new Date(), c, f);
            BookingPK key = newBooking.getPkey();

            em.persist(newBooking);

            return key;
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }

    @Override
    public Booking getBooking(String user, String id) {
        BookingPK key = new BookingPK(user, id);
        return em.find(Booking.class, key);
    }

    @Override
    public List<Booking> getBookingsByUser(String user) {
        Query q = em.createQuery("SELECT obj FROM Booking obj where obj.customer.id=?1");
        q.setParameter(1, user);

        List<Booking> results = (List<Booking>) q.getResultList();

        return results;
    }

    @Transactional(propagation = Propagation.REQUIRED)
    @Override
    public void cancelBooking(String user, String id) {
        Booking booking = getBooking(user, id);
        if (booking != null) {
            em.remove(booking);
        }
    }

}