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package in.shop2020.web;
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import java.io.IOException;
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import java.util.Collection;
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import javax.servlet.RequestDispatcher;
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import javax.servlet.ServletException;
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import javax.servlet.http.HttpServlet;
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import javax.servlet.http.HttpServletRequest;
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import javax.servlet.http.HttpServletResponse;
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import in.shop2020.model.Message;
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import in.shop2020.server.MessageRepository;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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public class IndexServlet extends HttpServlet {
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@SuppressWarnings("unused")
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private static final Logger log = LoggerFactory
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.getLogger(IndexServlet.class);
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private MessageRepository messageRepository = new MessageRepository();
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@Override
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protected void doGet(HttpServletRequest request,
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HttpServletResponse response) throws ServletException, IOException {
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if (log.isDebugEnabled()) {
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log.debug("doGet");
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}
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// delete
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if (request.getParameter("id") != null) {
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deleteMessage(request);
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response.sendRedirect("index");
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return;
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}
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// get
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Collection<Message> messages = messageRepository.getAll();
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request.setAttribute("messages", messages);
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if (log.isDebugEnabled()) {
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log.debug("messages: " + messages);
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}
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forward(request, response, "index.jsp");
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}
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@Override
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protected void doPost(HttpServletRequest request,
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HttpServletResponse response) throws ServletException, IOException {
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if (log.isDebugEnabled()) {
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log.debug("doPost");
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}
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// create
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createMessage(request);
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response.sendRedirect("index");
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}
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protected void createMessage(HttpServletRequest request) {
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String text = request.getParameter("text");
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if (log.isDebugEnabled()) {
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log.debug("creating message with text: " + text);
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}
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Message message = new Message();
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message.setText(text);
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messageRepository.create(message);
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}
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protected void deleteMessage(HttpServletRequest request) throws IOException {
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Long id = Long.valueOf(request.getParameter("id"));
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if (log.isDebugEnabled()) {
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log.debug("deleting message with id: " + id);
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}
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messageRepository.deleteById(id);
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}
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/**
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* Forwards request and response to given path. Handles any exceptions
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* caused by forward target by printing them to logger.
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*
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* @param request
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* @param response
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* @param path
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*/
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protected void forward(HttpServletRequest request,
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HttpServletResponse response, String path) {
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try {
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RequestDispatcher rd = request.getRequestDispatcher(path);
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rd.forward(request, response);
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} catch (Throwable tr) {
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if (log.isErrorEnabled()) {
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log.error("Cought Exception: " + tr.getMessage());
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log.debug("StackTrace:", tr);
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}
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}
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}
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}
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