UserMarkerServlet.java

package com.google.codeu.servlets;

import com.google.codeu.data.Datastore;
import com.google.codeu.data.UserMarker;
import com.google.gson.Gson;
import java.io.IOException;
import java.util.List;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.jsoup.Jsoup;
import org.jsoup.safety.Whitelist;

/** Handles fetching and saving {@link UserMarker} instances. */
@WebServlet("/user-markers")
public class UserMarkerServlet extends HttpServlet {

  private Datastore datastore;

  @Override
  public void init() {
    datastore = new Datastore();
  }

  @Override
  public void doGet(HttpServletRequest request, HttpServletResponse response) throws IOException {
    response.setContentType("application/json");

    List<UserMarker> markers = datastore.getMarkers();
    Gson gson = new Gson();
    String json = gson.toJson(markers);

    response.getOutputStream().println(json);
  }

  @Override
  public void doPost(HttpServletRequest request, HttpServletResponse response) {

    double lat = Double.parseDouble(request.getParameter("lat"));
    double lng = Double.parseDouble(request.getParameter("lng"));
    String content = Jsoup.clean(request.getParameter("content"), Whitelist.none());

    UserMarker marker = new UserMarker(lat, lng, content);
    datastore.storeMarker(marker);
  }
}