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
96
97
98
99
100
101
102
103
104
105
106
107
|
package org.openslx.dnbd3;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.Socket;
import java.nio.ByteBuffer;
import java.util.List;
import org.openslx.dnbd3.xml.Client;
import org.openslx.dnbd3.xml.Image;
import org.openslx.dnbd3.xml.Info;
import org.simpleframework.xml.core.Persister;
public class DNBD3Server {
private static final int CMDSTOP = 0;
private static final int CMDRELOAD = 1;
private static final int CMDINFO = 2;
private static final int CMDCONFIG = 3;
private static final String HOST = "127.0.0.1";
private static final int PORT = 5004;
public void doReload() throws IOException, DNBD3Exception {
Socket sock = new Socket(HOST, PORT);
sendHeader(sock, new DNBD3Header(CMDRELOAD, 0, 0));
receiveHeader(sock);
sock.close();
}
public void doShutdown() throws IOException, DNBD3Exception {
Socket sock = new Socket(HOST, PORT);
sendHeader(sock, new DNBD3Header(CMDSTOP, 0, 0));
receiveHeader(sock);
sock.close();
}
public void addImage(Image image) throws Exception {
Info info = new Info();
info.getImages().add(image);
ByteArrayOutputStream os = new ByteArrayOutputStream();
new Persister().write(info, os);
Socket sock = new Socket(HOST, PORT);
sendHeader(sock, new DNBD3Header(CMDCONFIG, os.size(), 0));
sock.getOutputStream().write(os.toByteArray());
receiveHeader(sock);
sock.close();
}
public List<Image> getImages() throws Exception {
Socket sock = new Socket(HOST, PORT);
sendHeader(sock, new DNBD3Header(CMDINFO, 0, 0));
receiveHeader(sock);
Info info = new Persister().read(Info.class, sock.getInputStream());
sock.close();
return info.getImages();
}
public List<Client> getClients() throws Exception {
Socket sock = new Socket(HOST, PORT);
sendHeader(sock, new DNBD3Header(CMDINFO, 0, 0));
receiveHeader(sock);
Info info = new Persister().read(Info.class, sock.getInputStream());
sock.close();
return info.getClients();
}
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
private void sendHeader(Socket sock, DNBD3Header header) throws IOException {
OutputStream os = sock.getOutputStream();
os.write(header.toByteArray());
}
private DNBD3Header receiveHeader(Socket sock) throws IOException, DNBD3Exception {
DNBD3Header header = new DNBD3Header();
InputStream is = sock.getInputStream();
byte[] bytes = ByteBuffer.allocate(12).array();
is.read(bytes, 0, 12);
header.fromByteArray(bytes);
switch (header.getError()) {
case 0:
return header;
case DNBD3Header.ERROR_IMAGE_NOT_FOUND:
throw new DNBD3Exception(DNBD3Header.ERROR_IMAGE_NOT_FOUND,
"Image file does not exist or is not readable");
case DNBD3Header.ERROR_IMAGE_ALREADY_EXISTS:
throw new DNBD3Exception(DNBD3Header.ERROR_IMAGE_ALREADY_EXISTS,
"Image with given vid and rid already exists");
case DNBD3Header.ERROR_CONFIG_FILE_PERMISSIONS:
throw new DNBD3Exception(DNBD3Header.ERROR_CONFIG_FILE_PERMISSIONS,
"Config file is not writable");
default:
throw new DNBD3Exception(DNBD3Header.ERROR_UNKNOWN,
"Unknown error, something went horribly wrong...");
}
}
}
|
