| /* |
| * Copyright 2016 Open Networking Laboratory |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package org.onlab.warden; |
| |
| import com.google.common.io.ByteStreams; |
| import org.eclipse.jetty.server.Response; |
| |
| import javax.servlet.ServletException; |
| import javax.servlet.http.HttpServlet; |
| import javax.servlet.http.HttpServletRequest; |
| import javax.servlet.http.HttpServletResponse; |
| import java.io.IOException; |
| import java.io.PrintWriter; |
| import java.text.SimpleDateFormat; |
| import java.util.ArrayList; |
| import java.util.Date; |
| import java.util.List; |
| |
| import static com.google.common.base.Strings.isNullOrEmpty; |
| |
| /** |
| * Web socket servlet capable of creating web sockets for the STC monitor. |
| */ |
| public class WardenServlet extends HttpServlet { |
| |
| static Warden warden; |
| |
| private SimpleDateFormat fmt = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); |
| |
| @Override |
| protected void doGet(HttpServletRequest req, HttpServletResponse resp) |
| throws ServletException, IOException { |
| resp.setContentType("text/plain; charset=UTF-8"); |
| try (PrintWriter out = resp.getWriter()) { |
| if (req.getPathInfo().endsWith("data")) { |
| String userName = req.getParameter("user"); |
| if (userName != null) { |
| printUserInfo(out, userName); |
| } else { |
| printAvailability(out); |
| } |
| } else { |
| printAvailabilityText(out); |
| } |
| } catch (Exception e) { |
| resp.setStatus(Response.SC_INTERNAL_SERVER_ERROR); |
| e.printStackTrace(); |
| } |
| } |
| |
| private void printUserInfo(PrintWriter out, String userName) { |
| Reservation reservation = warden.currentUserReservation(userName); |
| out.println(getCellStatus(null, reservation)); |
| } |
| |
| private void printAvailability(PrintWriter out) { |
| List<String> list = new ArrayList<>(warden.getCells()); |
| list.sort(String::compareTo); |
| for (String cellName : list) { |
| Reservation reservation = warden.currentCellReservation(cellName); |
| out.println(getCellStatus(cellName, reservation)); |
| } |
| } |
| |
| private String getCellStatus(String cellName, Reservation reservation) { |
| if (reservation != null) { |
| long expiration = reservation.time + reservation.duration * 60_000; |
| long remaining = (expiration - System.currentTimeMillis()) / 60_000; |
| return String.format("%s,%s,%s,%s", reservation.cellName, |
| reservation.cellSpec, reservation.userName, remaining); |
| } else if (cellName != null) { |
| return String.format("%s", cellName); |
| } |
| return null; |
| } |
| |
| private void printAvailabilityText(PrintWriter out) { |
| List<String> list = new ArrayList<>(warden.getCells()); |
| list.sort(String::compareTo); |
| for (String cellName : list) { |
| Reservation reservation = warden.currentCellReservation(cellName); |
| if (reservation != null) { |
| long expiration = reservation.time + reservation.duration * 60_000; |
| long remaining = (expiration - System.currentTimeMillis()) / 60_000; |
| out.println(String.format("%-14s\t%-10s\t%s\t%s\t%s mins (%s remaining)", |
| cellName + "-" + reservation.cellSpec, |
| reservation.userName, |
| fmt.format(new Date(reservation.time)), |
| fmt.format(new Date(expiration)), |
| reservation.duration, remaining)); |
| } else { |
| out.println(String.format("%-10s\t%-10s", cellName, "available")); |
| } |
| } |
| } |
| |
| @Override |
| protected void doPost(HttpServletRequest req, HttpServletResponse resp) |
| throws ServletException, IOException { |
| try (PrintWriter out = resp.getWriter()) { |
| String sshKey = new String(ByteStreams.toByteArray(req.getInputStream()), "UTF-8"); |
| String userName = req.getParameter("user"); |
| String sd = req.getParameter("duration"); |
| String spec = req.getParameter("spec"); |
| int duration = isNullOrEmpty(sd) ? 0 : Integer.parseInt(sd); |
| String cellDefinition = warden.borrowCell(userName, sshKey, duration, spec); |
| out.println(cellDefinition); |
| } catch (Exception e) { |
| resp.setStatus(Response.SC_INTERNAL_SERVER_ERROR); |
| e.printStackTrace(); |
| } |
| } |
| |
| @Override |
| protected void doDelete(HttpServletRequest req, HttpServletResponse resp) |
| throws ServletException, IOException { |
| try (PrintWriter out = resp.getWriter()) { |
| String userName = req.getParameter("user"); |
| warden.returnCell(userName); |
| } catch (Exception e) { |
| resp.setStatus(Response.SC_INTERNAL_SERVER_ERROR); |
| e.printStackTrace(); |
| } |
| } |
| } |