Created
April 8, 2012 16:00
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| <%@page contentType="text/html" pageEncoding="UTF-8"%> | |
| <%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %> | |
| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> | |
| <title>JSP Page</title> | |
| </head> | |
| <body> | |
| <a href="index">Back</a> | |
| <ul> | |
| <c:forEach items="${shortens}" var="shorten"> | |
| <li><a href="${shorten.url}">${shorten.url}</a> => <a href="http://localhost:8080/short/r/${shorten.id}">http://localhost:8080/short/r/${shorten.id}</a> : <a href="delete?id=${shorten.id}">X</a></li> | |
| </c:forEach> | |
| </body> | |
| </html> |
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| <%@page contentType="text/html" pageEncoding="UTF-8"%> | |
| <%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %> | |
| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> | |
| <title>JSP Page</title> | |
| </head> | |
| <body> | |
| <a href="all">All</a> | |
| <form action="index" method="post"> | |
| <input type="text" name="url" id="url"> | |
| <input type="submit" value="add"> | |
| </form> | |
| <c:if test="${not empty miniurl}"> | |
| <p> | |
| <a href="${url}">${url}</a> => <a href="${miniurl}">${miniurl}</a> | |
| </p> | |
| </c:if> | |
| </body> | |
| </html> |
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| @Stateless | |
| public class ShortenService { | |
| @PersistenceContext EntityManager em; | |
| public List<Shorten> all() { | |
| return em.createQuery("select o from Shorten o").getResultList(); | |
| } | |
| public long count() { | |
| Long l = Long.parseLong(em.createQuery("select count(e) from Shorten e").getSingleResult().toString()); | |
| if (l == null || l < 0) { | |
| return 0L; | |
| } | |
| return l; | |
| } | |
| public int deleteAll() { | |
| return em.createQuery("delete from Shorten").executeUpdate(); | |
| } | |
| public void delete(Shorten shorten) { | |
| em.remove(findById(shorten.getId())); | |
| } | |
| public Shorten findById(Long primaryKey) { | |
| return em.find(Shorten.class, primaryKey); | |
| } | |
| public Shorten save(Shorten shorten) { | |
| if (em.contains(shorten)) { | |
| return em.merge(shorten); | |
| } | |
| em.persist(shorten); | |
| return shorten; | |
| } | |
| public Shorten get(String val) { | |
| Shorten shorten = (Shorten) em.createQuery("select e from Shorten e where e.url == " + val).getSingleResult(); | |
| if (shorten == null || shorten.getUrl() == null) { | |
| shorten = new Shorten(val); | |
| save(shorten); | |
| } | |
| return shorten; | |
| } | |
| } |
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| import java.io.Serializable; | |
| import javax.persistence.Entity; | |
| import javax.persistence.GeneratedValue; | |
| import javax.persistence.GenerationType; | |
| import javax.persistence.Id; | |
| @Entity | |
| public class Shorten implements Serializable { | |
| private final long serialVersionUID = 1L; | |
| @Id | |
| @GeneratedValue(strategy = GenerationType.AUTO) | |
| private Long id; | |
| private String url; | |
| public Shorten() {} | |
| public Shorten(String url) { | |
| this.url = url; | |
| } | |
| public String completeUrl() { | |
| return "/r/" + id; | |
| } | |
| public String getUrl() { | |
| return url; | |
| } | |
| public void setUrl(String url) { | |
| this.url = url; | |
| } | |
| public Long getId() { | |
| return id; | |
| } | |
| public void setId(Long id) { | |
| this.id = id; | |
| } | |
| } |
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| import foo.bar.services.ShortenService; | |
| import foo.bar.model.Shorten; | |
| import java.io.IOException; | |
| import javax.ejb.EJB; | |
| import javax.servlet.ServletException; | |
| import javax.servlet.annotation.WebServlet; | |
| import javax.servlet.http.HttpServlet; | |
| import javax.servlet.http.HttpServletRequest; | |
| import javax.servlet.http.HttpServletResponse; | |
| @WebServlet(name="Application", urlPatterns={"/index"}) | |
| public class Application extends HttpServlet { | |
| @EJB ShortenService handler; | |
| @Override | |
| protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { | |
| getServletContext().getRequestDispatcher("/index.jsp").forward(req, resp); | |
| } | |
| @Override | |
| protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { | |
| String url = req.getParameter("url"); | |
| Shorten shorten = handler.save(new Shorten(url)); | |
| req.setAttribute("url", url); | |
| req.setAttribute("miniurl", "http://localhost:8080/short/r/" + shorten.getId()); | |
| getServletContext().getRequestDispatcher("/index.jsp").forward(req, resp); | |
| } | |
| } |
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