Hello,
I try to use EJB3 in portlet, but it just raised NullPointerException !
Could you please to teach me how to solve it ?
| @Stateless
| @Local(ProductLocal.class)
| public class ProductBean implements ProductLocal {
| @PersistenceContext
| // (unitName="cal")
| protected EntityManager em;
|
| /**
| *
| */
| public ProductBean() {
| super();
| // TODO Auto-generated constructor stub
| }
|
| /**
| * (non-Javadoc)
| *
| * @see mo.reales.ejb.session.ProductLocal#addProduct(java.lang.String,
| * java.lang.String, java.lang.String, float, int, int,
| * java.lang.String, java.lang.String)
| */
| public void addProduct(String buildingName, String floor, String flat,
| float area, int totalRoom, int totalSittingRoom, String
direction,
| String description) {
|
| Product product = new Product();
| product.setBuildingName(buildingName);
| product.setFlat(floor);
| product.setFlat(flat);
| product.setArea(area);
| product.setTotalRoom(totalRoom);
| product.setTotalSittingRoom(totalSittingRoom);
| product.setDirection(direction);
| product.setDescription(description);
|
| em.persist(product);
| }
|
| /**
| * (non-Javadoc)
| * @see mo.reales.ejb.session.ProductLocal#getProducts()
| */
| public Collection<Product> getProducts() {
| return em.createQuery("from Product p").getResultList();
|
| }
| }
|
| public interface ProductIF {
| /**
| * Add new product
| *
| * @param buildingName
| * @param floor
| * @param flat
| * @param area
| * @param totalRoom
| * @param totalSittingRoom
| * @param direction
| * @param description
| */
| public void addProduct(String buildingName, String floor, String flat,
| float area, int totalRoom, int totalSittingRoom, String
direction,
| String description);
|
|
| /**
| * get all the products
| *
| * @return
| */
| public Collection<Product> getProducts();
|
| }
|
|
| public interface ProductLocal extends ProductIF {
|
|
| }
|
| public class ProductDAO implements ProductIF {
|
| @EJB
| protected ProductLocal productLocal;
|
| /**
| *
| */
| public ProductDAO() {
| super();
| }
|
| /*
| * (non-Javadoc)
| *
| * @see mo.reales.ejb.session.ProductIF#addProduct(java.lang.String,
| * java.lang.String, java.lang.String, float, int, int,
| * java.lang.String, java.lang.String)
| */
| public void addProduct(String buildingName, String floor, String flat,
| float area, int totalRoom, int totalSittingRoom, String
direction,
| String description) {
|
| productLocal.addProduct(buildingName, floor, flat, area,
totalRoom,
| totalSittingRoom, direction, description);
|
| }
|
| /*
| * (non-Javadoc)
| *
| * @see mo.reales.ejb.session.ProductIF#getProducts()
| */
| public Collection<Product> getProducts() {
| return productLocal.getProducts();
| }
| }
|
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