JavaEE lessons for Geekbrains.zip

package ru.geekbrains.controller; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import ru.geekbrains.persist.ToDo; import ru.geekbrains.persist.ToDoRepository; import javax.servlet.ServletException; import javax.servlet.annotation.WebServlet; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import java.io.IOException; import java.sql.SQLException; import java.time.LocalDate; import java.time.format.DateTimeParseException; import static ru.geekbrains.listner.ContextListener.TODO_REPO; @WebServlet(name = "ToDoServlet", urlPatterns = {"", "/"}) public class ToDoServlet extends HttpServlet { private static final Logger logger = LoggerFactory.getLogger(ToDoServlet.class); private ToDoRepository repository; @Override public void init() throws ServletException { this.repository = (ToDoRepository) getServletContext().getAttribute(TODO_REPO); if (this.repository == null) { throw new ServletException("TodoRepository is not initialized"); } } @Override protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { logger.info("PathInfo: {}", req.getPathInfo()); logger.info("ServletPath: {}", req.getServletPath()); logger.info("ResourceURL: {}", getServletContext().getResource("/WEB-INF/templates/index.jsp")); if (req.getServletPath().equals("/")) { showAllTodos(req, resp); } else if (req.getServletPath().equals("/new")) { showNewTodoPage(req, resp); } else if (req.getServletPath().equals("/edit")) { showEditTodoPage(req, resp); } else if (req.getServletPath().equals("/delete")) { deleteTodo(req, resp); } else { resp.sendError(HttpServletResponse.SC_NOT_FOUND); } } @Override protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { logger.info("Date {}", req.getParameter("targetDate")); if (req.getServletPath().equals("/update")) { updateTodo(req, resp); } else if (req.getServletPath().equals("/create")) { createTodo(req, resp); } else { resp.setStatus(HttpServletResponse.SC_NOT_FOUND); } } private void showAllTodos(HttpServletRequest req, HttpServletResponse resp) throws IOException, ServletException { try { req.setAttribute("todos", repository.findAll()); } catch (SQLException ex) { logger.error("", ex); resp.sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR); return; } getServletContext().getRequestDispatcher("/WEB-INF/templates/index.jsp").forward(req, resp); } private void showNewTodoPage(HttpServletRequest req, HttpServletResponse resp) throws IOException, ServletException { req.setAttribute("todo", new ToDo()); req.setAttribute("action", "create"); getServletContext().getRequestDispatcher("/WEB-INF/templates/todo.jsp").forward(req, resp); } private void showEditTodoPage(HttpServletRequest req, HttpServletResponse resp) throws IOException, ServletException { long id; try { id = Long.parseLong(req.getParameter("id")); } catch (Exception ex) { logger.error("", ex); resp.sendError(HttpServletResponse.SC_BAD_REQUEST); return; } ToDo toDo; try { toDo = repository.findById(id); } catch (SQLException ex) { logger.error("", ex); resp.sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR); return; } req.setAttribute("todo", toDo); req.setAttribute("action", "update"); getServletContext().getRequestDispatcher("/WEB-INF/templates/todo.jsp").forward(req, resp); } private void deleteTodo(HttpServletRequest req, HttpServletResponse resp) throws IOException { long id; try { id = Long.parseLong(req.getParameter("id")); } catch (Exception ex) { logger.error("", ex); resp.sendError(HttpServletResponse.SC_BAD_REQUEST, ex.getMessage()); return; } try { repository.delete(id); resp.sendRedirect(getServletContext().getContextPath() + "/todos"); } catch (SQLException ex) { logger.error("", ex); resp.sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR); } } private void updateTodo(HttpServletRequest req, HttpServletResponse resp) throws IOException { try { repository.update(new ToDo( Long.parseLong(req.getParameter("id")), req.getParameter("description"), LocalDate.parse(req.getParameter("targetDate")))); resp.sendRedirect(getServletContext().getContextPath()); } catch (SQLException ex) { logger.error("", ex); resp.setStatus(HttpServletResponse.SC_INTERNAL_SERVER_ERROR); } catch (NumberFormatException|DateTimeParseException ex) { logger.error("", ex); resp.setStatus(HttpServletResponse.SC_BAD_REQUEST); } } private void createTodo(HttpServletRequest req, HttpServletResponse resp) throws IOException { try { repository.insert(new ToDo( -1L, req.getParameter("description"), LocalDate.parse(req.getParameter("targetDate")))); resp.sendRedirect(getServletContext().getContextPath()); } catch (SQLException ex) { logger.error("", ex); resp.setStatus(HttpServletResponse.SC_INTERNAL_SERVER_ERROR); } catch (NumberFormatException|DateTimeParseException ex) { logger.error("", ex); resp.setStatus(HttpServletResponse.SC_BAD_REQUEST); } } }