WardenServlet.java
3.75 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
/*
* 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.Date;
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;
@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException {
resp.setContentType("text/plain; charset=UTF-8");
SimpleDateFormat fmt = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
try (PrintWriter out = resp.getWriter()) {
for (String cellName : warden.getCells()) {
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("%-10s\t%-10s\t%s\t%s\t%s mins (%s remaining)",
cellName,
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"));
}
}
} catch (Exception e) {
resp.setStatus(Response.SC_INTERNAL_SERVER_ERROR);
e.printStackTrace();
}
}
@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");
int duration = isNullOrEmpty(sd) ? 0 : Integer.parseInt(sd);
String cellDefinition = warden.borrowCell(userName, sshKey, duration);
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();
}
}
}