DataTable Column Resize

@Named("dtResizableColumnsView")
@RequestScoped
public class ResizableColumnsView implements Serializable {

    private List<Product> products1;
    private List<Product> products2;

    @Inject
    private ProductService service;

    @PostConstruct
    public void init() {
        products1 = service.getProducts(10);
        products2 = service.getProducts(10);
    }

    public void onResize(ColumnResizeEvent event) {
        FacesMessage msg = new FacesMessage("Column " + event.getColumn().getClientId() + " resized", "W:" + event.getWidth() + ", H:" + event.getHeight());
        FacesContext.getCurrentInstance().addMessage(null, msg);
    }

    public List<Product> getProducts1() {
        return products1;
    }

    public List<Product> getProducts2() {
        return products2;
    }

    public void setService(ProductService service) {
        this.service = service;
    }
}

@Named
@ApplicationScoped
public class ProductService {

    private List<Product> products;

    @PostConstruct
    public void init() {
        products = new ArrayList<>();
        products.add(new Product(1000, "f230fh0g3", "Bamboo Watch", "Product Description", "bamboo-watch.jpg", 65,
                "Accessories", 24, InventoryStatus.INSTOCK, 5));
        products.add(new Product(1001, "nvklal433", "Black Watch", "Product Description", "black-watch.jpg", 72,
                "Accessories", 61, InventoryStatus.INSTOCK, 4));
        products.add(new Product(1002, "zz21cz3c1", "Blue Band", "Product Description", "blue-band.jpg", 79,
                "Fitness", 2, InventoryStatus.LOWSTOCK, 3));
        products.add(new Product(1003, "244wgerg2", "Blue T-Shirt", "Product Description", "blue-t-shirt.jpg", 29,
                "Clothing", 25, InventoryStatus.INSTOCK, 5));
        products.add(new Product(1004, "h456wer53", "Bracelet", "Product Description", "bracelet.jpg", 15,
                "Accessories", 73, InventoryStatus.INSTOCK, 4));
        products.add(new Product(1005, "av2231fwg", "Brown Purse", "Product Description", "brown-purse.jpg", 120,
                "Accessories", 0, InventoryStatus.OUTOFSTOCK, 4));
        products.add(new Product(1006, "bib36pfvm", "Chakra Bracelet", "Product Description", "chakra-bracelet.jpg", 32,
                "Accessories", 5, InventoryStatus.LOWSTOCK, 3));
        products.add(new Product(1007, "mbvjkgip5", "Galaxy Earrings", "Product Description", "galaxy-earrings.jpg", 34,
                "Accessories", 23, InventoryStatus.INSTOCK, 5));
        products.add(new Product(1008, "vbb124btr", "Game Controller", "Product Description", "game-controller.jpg", 99,
                "Electronics", 2, InventoryStatus.LOWSTOCK, 4));
        products.add(new Product(1009, "cm230f032", "Gaming Set", "Product Description", "gaming-set.jpg", 299,
                "Electronics", 63, InventoryStatus.INSTOCK, 3));
        products.add(new Product(1010, "plb34234v", "Gold Phone Case", "Product Description", "gold-phone-case.jpg", 24,
                "Accessories", 0, InventoryStatus.OUTOFSTOCK, 4));
        products.add(new Product(1011, "4920nnc2d", "Green Earbuds", "Product Description", "green-earbuds.jpg", 89,
                "Electronics", 23, InventoryStatus.INSTOCK, 4));
        products.add(new Product(1012, "250vm23cc", "Green T-Shirt", "Product Description", "green-t-shirt.jpg", 49,
                "Clothing", 74, InventoryStatus.INSTOCK, 5));
        products.add(new Product(1013, "fldsmn31b", "Grey T-Shirt", "Product Description", "grey-t-shirt.jpg", 48,
                "Clothing", 0, InventoryStatus.OUTOFSTOCK, 3));
        products.add(new Product(1014, "waas1x2as", "Headphones", "Product Description", "headphones.jpg", 175,
                "Electronics", 8, InventoryStatus.LOWSTOCK, 5));
        products.add(new Product(1015, "vb34btbg5", "Light Green T-Shirt", "Product Description", "light-green-t-shirt.jpg", 49,
                "Clothing", 34, InventoryStatus.INSTOCK, 4));
        products.add(new Product(1016, "k8l6j58jl", "Lime Band", "Product Description", "lime-band.jpg", 79,
                "Fitness", 12, InventoryStatus.INSTOCK, 3));
        products.add(new Product(1017, "v435nn85n", "Mini Speakers", "Product Description", "mini-speakers.jpg", 85,
                "Clothing", 42, InventoryStatus.INSTOCK, 4));
        products.add(new Product(1018, "09zx9c0zc", "Painted Phone Case", "Product Description", "painted-phone-case.jpg", 56,
                "Accessories", 41, InventoryStatus.INSTOCK, 5));
        products.add(new Product(1019, "mnb5mb2m5", "Pink Band", "Product Description", "pink-band.jpg", 79,
                "Fitness", 63, InventoryStatus.INSTOCK, 4));
        products.add(new Product(1020, "r23fwf2w3", "Pink Purse", "Product Description", "pink-purse.jpg", 110,
                "Accessories", 0, InventoryStatus.OUTOFSTOCK, 4));
        products.add(new Product(1021, "pxpzczo23", "Purple Band", "Product Description", "purple-band.jpg", 79,
                "Fitness", 6, InventoryStatus.LOWSTOCK, 3));
        products.add(new Product(1022, "2c42cb5cb", "Purple Gemstone Necklace", "Product Description", "purple-gemstone-necklace.jpg", 45,
                "Accessories", 62, InventoryStatus.INSTOCK, 4));
        products.add(new Product(1023, "5k43kkk23", "Purple T-Shirt", "Product Description", "purple-t-shirt.jpg", 49,
                "Clothing", 2, InventoryStatus.LOWSTOCK, 5));
        products.add(new Product(1024, "lm2tny2k4", "Shoes", "Product Description", "shoes.jpg", 64,
                "Clothing", 0, InventoryStatus.INSTOCK, 4));
        products.add(new Product(1025, "nbm5mv45n", "Sneakers", "Product Description", "sneakers.jpg", 78,
                "Clothing", 52, InventoryStatus.INSTOCK, 4));
        products.add(new Product(1026, "zx23zc42c", "Teal T-Shirt", "Product Description", "teal-t-shirt.jpg", 49,
                "Clothing", 3, InventoryStatus.LOWSTOCK, 3));
        products.add(new Product(1027, "acvx872gc", "Yellow Earbuds", "Product Description", "yellow-earbuds.jpg", 89,
                "Electronics", 35, InventoryStatus.INSTOCK, 3));
        products.add(new Product(1028, "tx125ck42", "Yoga Mat", "Product Description", "yoga-mat.jpg", 20,
                "Fitness", 15, InventoryStatus.INSTOCK, 5));
        products.add(new Product(1029, "gwuby345v", "Yoga Set", "Product Description", "yoga-set.jpg", 20,
                "Fitness", 25, InventoryStatus.INSTOCK, 8));

    }

    public List<Product> getProducts() {
        return new ArrayList<>(products);
    }

    public List<Product> getProducts(int size) {

        if (size > products.size()) {
            Random rand = new Random();

            List<Product> randomList = new ArrayList<>();
            for (int i = 0; i < size; i++) {
                int randomIndex = rand.nextInt(products.size());
                randomList.add(products.get(randomIndex));
            }

            return randomList;
        }

        else {
            return new ArrayList<>(products.subList(0, size));
        }

    }

    public List<Product> getClonedProducts(int size) {
        List<Product> results = new ArrayList<>();
        List<Product> originals = getProducts(size);
        for (Product original : originals) {
            results.add(original.clone());
        }

        // make sure to have unique codes
        for (Product product : results) {
            product.setCode(UUID.randomUUID().toString().replace("-", "").substring(0, 8));
        }

        return results;
    }
}

@Named("dtGroupView")
@ViewScoped
public class GroupView implements Serializable {

    private static final String[] MANUFACTORS;
    private static final String[] PLAYER_NAMES;

    private List<Sale> sales;
    private Integer lastYearTotal;
    private Integer thisYearTotal;
    private List<Integer> years;
    private List<Player> players;

    static {
        MANUFACTORS = new String[10];
        MANUFACTORS[0] = "Bamboo Watch";
        MANUFACTORS[1] = "Black Watch";
        MANUFACTORS[2] = "Blue Band";
        MANUFACTORS[3] = "Blue T-Shirt";
        MANUFACTORS[4] = "Brown Purse";
        MANUFACTORS[5] = "Chakra Bracelet";
        MANUFACTORS[6] = "Galaxy Earrings";
        MANUFACTORS[7] = "Game Controller";
        MANUFACTORS[8] = "Gaming Set";
        MANUFACTORS[9] = "Gold Phone Case";

        PLAYER_NAMES = new String[10];
        PLAYER_NAMES[0] = "Lionel Messi";
        PLAYER_NAMES[1] = "Cristiano Ronaldo";
        PLAYER_NAMES[2] = "Arjen Robben";
        PLAYER_NAMES[3] = "Franck Ribery";
        PLAYER_NAMES[4] = "Ronaldinho";
        PLAYER_NAMES[5] = "Luis Suarez";
        PLAYER_NAMES[6] = "Sergio Aguero";
        PLAYER_NAMES[7] = "Zlatan Ibrahimovic";
        PLAYER_NAMES[8] = "Neymar Jr";
        PLAYER_NAMES[9] = "Andres Iniesta";
    }

    @PostConstruct
    public void init() {
        sales = new ArrayList<>();
        for (int i = 0; i < 10; i++) {
            sales.add(new Sale(MANUFACTORS[i], getRandomAmount(), getRandomAmount(), getRandomPercentage(), getRandomPercentage()));
        }

        years = new ArrayList<>();
        years.add(2010);
        years.add(2011);
        years.add(2012);
        years.add(2013);
        years.add(2014);

        players = new ArrayList<>();
        for (int i = 0; i < 10; i++) {
            players.add(new Player(PLAYER_NAMES[i], generateRandomGoalStatsData()));
        }
    }

    public List<Sale> getSales() {
        return sales;
    }

    private int getRandomAmount() {
        return (int) (Math.random() * 100000);
    }

    private int getRandomPercentage() {
        return (int) (Math.random() * 100);
    }

    public Integer getLastYearTotal() {
        if (lastYearTotal == null) {
            lastYearTotal = sales.stream().mapToInt(Sale::getLastYearSale).sum();
        }
        return lastYearTotal;
    }

    public Integer getThisYearTotal() {
        if (thisYearTotal == null) {
            thisYearTotal = sales.stream().mapToInt(Sale::getThisYearSale).sum();
        }
        return thisYearTotal;
    }

    public List<Integer> getYears() {
        return years;
    }

    public int getYearCount() {
        return years.size();
    }

    public List<Player> getPlayers() {
        return players;
    }

    private Map<Integer, Integer> generateRandomGoalStatsData() {
        Map<Integer, Integer> stats = new LinkedHashMap<>();
        for (int i = 0; i < 5; i++) {
            stats.put(years.get(i), getRandomGoals());
        }

        return stats;
    }

    private int getRandomGoals() {
        return (int) (Math.random() * 50);
    }
}