com.iluwatar.hexagonal.database.MongoTicketRepository.java Source code

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Here is the source code for com.iluwatar.hexagonal.database.MongoTicketRepository.java

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/**
 * The MIT License
 * Copyright (c) 2014-2016 Ilkka Seppl
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
package com.iluwatar.hexagonal.database;

import com.iluwatar.hexagonal.domain.LotteryNumbers;
import com.iluwatar.hexagonal.domain.LotteryTicket;
import com.iluwatar.hexagonal.domain.LotteryTicketId;
import com.iluwatar.hexagonal.domain.PlayerDetails;
import com.mongodb.MongoClient;
import com.mongodb.client.MongoCollection;
import com.mongodb.client.MongoDatabase;
import org.bson.Document;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Optional;
import java.util.Set;

/**
 * Mongo lottery ticket database
 */
public class MongoTicketRepository implements LotteryTicketRepository {

    private static final String DEFAULT_DB = "lotteryDB";
    private static final String DEFAULT_TICKETS_COLLECTION = "lotteryTickets";
    private static final String DEFAULT_COUNTERS_COLLECTION = "counters";

    private MongoClient mongoClient;
    private MongoDatabase database;
    private MongoCollection<Document> ticketsCollection;
    private MongoCollection<Document> countersCollection;

    /**
     * Constructor
     */
    public MongoTicketRepository() {
        connect();
    }

    /**
     * Constructor accepting parameters
     */
    public MongoTicketRepository(String dbName, String ticketsCollectionName, String countersCollectionName) {
        connect(dbName, ticketsCollectionName, countersCollectionName);
    }

    /**
     * Connect to database with default parameters
     */
    public void connect() {
        connect(DEFAULT_DB, DEFAULT_TICKETS_COLLECTION, DEFAULT_COUNTERS_COLLECTION);
    }

    /**
     * Connect to database with given parameters
     */
    public void connect(String dbName, String ticketsCollectionName, String countersCollectionName) {
        if (mongoClient != null) {
            mongoClient.close();
        }
        mongoClient = new MongoClient(System.getProperty("mongo-host"),
                Integer.parseInt(System.getProperty("mongo-port")));
        database = mongoClient.getDatabase(dbName);
        ticketsCollection = database.getCollection(ticketsCollectionName);
        countersCollection = database.getCollection(countersCollectionName);
        if (countersCollection.count() <= 0) {
            initCounters();
        }
    }

    private void initCounters() {
        Document doc = new Document("_id", "ticketId").append("seq", 1);
        countersCollection.insertOne(doc);
    }

    /**
     * @return next ticket id
     */
    public int getNextId() {
        Document find = new Document("_id", "ticketId");
        Document increase = new Document("seq", 1);
        Document update = new Document("$inc", increase);
        Document result = countersCollection.findOneAndUpdate(find, update);
        return result.getInteger("seq");
    }

    /**
     * @return mongo client
     */
    public MongoClient getMongoClient() {
        return mongoClient;
    }

    /**
     *
     * @return mongo database
     */
    public MongoDatabase getMongoDatabase() {
        return database;
    }

    /**
     *
     * @return tickets collection
     */
    public MongoCollection<Document> getTicketsCollection() {
        return ticketsCollection;
    }

    /**
     *
     * @return counters collection
     */
    public MongoCollection<Document> getCountersCollection() {
        return countersCollection;
    }

    @Override
    public Optional<LotteryTicket> findById(LotteryTicketId id) {
        Document find = new Document("ticketId", id.getId());
        List<Document> results = ticketsCollection.find(find).limit(1).into(new ArrayList<Document>());
        if (results.size() > 0) {
            LotteryTicket lotteryTicket = docToTicket(results.get(0));
            return Optional.of(lotteryTicket);
        } else {
            return Optional.empty();
        }
    }

    @Override
    public Optional<LotteryTicketId> save(LotteryTicket ticket) {
        int ticketId = getNextId();
        Document doc = new Document("ticketId", ticketId);
        doc.put("email", ticket.getPlayerDetails().getEmail());
        doc.put("bank", ticket.getPlayerDetails().getBankAccount());
        doc.put("phone", ticket.getPlayerDetails().getPhoneNumber());
        doc.put("numbers", ticket.getNumbers().getNumbersAsString());
        ticketsCollection.insertOne(doc);
        return Optional.of(new LotteryTicketId(ticketId));
    }

    @Override
    public Map<LotteryTicketId, LotteryTicket> findAll() {
        Map<LotteryTicketId, LotteryTicket> map = new HashMap<>();
        List<Document> docs = ticketsCollection.find(new Document()).into(new ArrayList<Document>());
        for (Document doc : docs) {
            LotteryTicket lotteryTicket = docToTicket(doc);
            map.put(lotteryTicket.getId(), lotteryTicket);
        }
        return map;
    }

    @Override
    public void deleteAll() {
        ticketsCollection.deleteMany(new Document());
    }

    private LotteryTicket docToTicket(Document doc) {
        PlayerDetails playerDetails = new PlayerDetails(doc.getString("email"), doc.getString("bank"),
                doc.getString("phone"));
        int[] numArray = Arrays.asList(doc.getString("numbers").split(",")).stream().mapToInt(Integer::parseInt)
                .toArray();
        Set<Integer> numbers = new HashSet<>();
        for (int num : numArray) {
            numbers.add(num);
        }
        LotteryNumbers lotteryNumbers = LotteryNumbers.create(numbers);
        return new LotteryTicket(new LotteryTicketId(doc.getInteger("ticketId")), playerDetails, lotteryNumbers);
    }
}