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
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
|
package derms.replica.replica1;
import java.io.IOException;
import java.io.Serializable;
import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.InetAddress;
import java.net.InetSocketAddress;
import java.net.SocketAddress;
import java.util.Collection;
import java.util.concurrent.Executors;
import java.util.concurrent.ExecutorService;
import java.util.List;
import java.util.logging.Logger;
public class FindResource {
public static final int port = 5558;
public static class Client implements Runnable {
private InetAddress serverAddr;
private Request request;
private Collection<Resource> response;
private Logger log;
public Client(Request request, InetAddress serverAddr, Collection<Resource> response) throws IOException {
this.serverAddr = serverAddr;
this.request = request;
this.response = response;
this.log = DermsLogger.getLogger(this.getClass());
}
@Override
public void run() {
DatagramSocket sock;
try {
sock = new DatagramSocket();
} catch (Exception e) {
log.severe("Failed to open socket: "+e.getMessage());
return;
}
DatagramPacket requestPkt;
try {
requestPkt = ObjectPacket.create(request, new InetSocketAddress(serverAddr, port));
} catch (IOException e) {
log.severe("Failed to create request packet: "+e.getMessage());
sock.close();
return;
}
try {
sock.send(requestPkt);
} catch (Exception e) {
log.severe("Failed to send request: "+e.getMessage());
sock.close();
return;
}
Resource[] resources;
try {
resources = ResourceTransfer.receive(sock);
} catch (IOException e) {
log.severe(e.getMessage());
return;
} finally {
sock.close();
}
for (Resource r : resources) {
response.add(r);
}
}
}
public static class Server implements Runnable {
private static final int bufsize = 4096;
private InetAddress localAddr;
private Resources resources;
private ExecutorService pool;
private Logger log;
public Server(InetAddress localAddr, Resources resources) throws IOException {
this.localAddr = localAddr;
this.resources = resources;
this.pool = Executors.newWorkStealingPool();
this.log = DermsLogger.getLogger(this.getClass());
}
@Override
public void run() {
DatagramSocket sock = null;
try {
sock = new DatagramSocket(port, localAddr);
} catch (Exception e) {
log.severe("Failed to bind socket: "+e.getMessage());
return;
}
log.info("Running on "+localAddr.toString()+":"+port);
DatagramPacket requestPkt = new DatagramPacket(new byte[bufsize], bufsize);
try {
for (;;) {
try {
sock.receive(requestPkt);
} catch (Exception e) {
log.warning("Error receiving from socket: "+e.getMessage());
continue;
}
log.info("Got request");
Request request;
try {
request = ObjectPacket.deserialize(requestPkt, Request.class);
} catch (IOException e) {
log.warning("Failed to deserialize request: "+e.getMessage());
continue;
}
pool.execute(new RequestHandler(request, requestPkt.getSocketAddress(), resources, log));
}
} finally {
sock.close();
}
}
}
public static class Request implements Serializable {
private CoordinatorID cid;
private ResourceName rname;
public Request(CoordinatorID cid, ResourceName rname) {
this.cid = cid;
this.rname = rname;
}
}
private static class RequestHandler implements Runnable {
private Request request;
private SocketAddress client;
private Resources resources;
private Logger log;
private RequestHandler(Request request, SocketAddress client, Resources resources, Logger log) {
this.request = request;
this.client = client;
this.resources = resources;
this.log = log;
}
@Override
public void run() {
List<Resource> borrowedResources = resources.borrowed(request.cid, request.rname);
log.info(""+borrowedResources.size()+" "+request.rname+" resources borrowed by "+request.cid);
try {
Resource[] arr = new Resource[0];
ResourceTransfer.send(borrowedResources.toArray(arr), client);
} catch (IOException e) {
log.severe("Failed to send response: "+e.getMessage());
}
}
}
}
|