public void run() {
try {
serverSocket = new ServerSocket(7777);
while (!stop) {
try {
// listen for incoming clients
Socket client = serverSocket.accept();
String remoteIp = client.getInetAddress().getHostAddress();
refreshFingerTable(remoteIp);
BufferedReader in = new BufferedReader(new InputStreamReader(client.getInputStream()));
PrintWriter out =
new PrintWriter(
new BufferedWriter(new OutputStreamWriter(client.getOutputStream())), true);
String line = null;
while ((line = in.readLine()) != null && !stop) {
((App) App.getLastInstance())
.getLog()
.add("< " + client.getInetAddress().getHostAddress() + ": " + line);
if (line.startsWith("lookup")) {
String[] split = line.split(" ");
String adress = getAdress(Integer.parseInt(split[1]), remoteIp);
out.println(adress);
} else if (line.startsWith("find")) {
String[] split = line.split(" ");
String adress = find(Integer.parseInt(split[1]), split[2], remoteIp);
out.println(adress);
} else if (line.startsWith("load")) {
String[] split = line.split(" ");
String load = load(Integer.parseInt(split[1]), remoteIp);
out.println(load);
} else if (line.startsWith("insert")) {
String[] split = line.split(" ");
((App) App.getLastInstance()).getData().put(split[1], split[2]);
}
}
in.close();
out.close();
} catch (Exception e) {
e.printStackTrace();
((App) App.getLastInstance()).getLog().add(e.getMessage());
}
}
} catch (Exception e) {
e.printStackTrace();
((App) App.getLastInstance()).getLog().add(e.getMessage());
}
}
private String getAdress(int lookupId, String remoteIp) {
int i;
int remoteId = Util.getId(remoteIp);
for (i = 0; i < 8; i++) {
int finguer = Util.finguer(myId, i);
if (remoteId < myId) {
if (lookupId > myId) {
if (finguer > lookupId) {
break;
}
} else {
if (finguer < myId && finguer > lookupId) {
break;
}
}
} else {
if (lookupId > remoteId) {
break;
} else if (lookupId <= myId) {
break;
} else if (finguer > lookupId) {
break;
}
}
}
i--;
return i == -1 ? myIp : ((App) App.getLastInstance()).getFingerTable().get(i);
}
private void refreshFingerTable(String remoteIp) {
MyArrayList<String> fingerTable = ((App) App.getLastInstance()).getFingerTable();
for (int i = 0; i < 8; i++) {
String ip = fingerTable.get(i);
fingerTable.set(i, Util.bestSucessor(Util.finguer(myId, i), ip, remoteIp));
}
}
private String load(int id, String remoteIp) {
int remoteId = Util.getId(remoteIp);
String value;
if (remoteId < myId) {
if (id <= myId) {
value = "+" + ((App) App.getLastInstance()).getData().size();
} else {
value = Util.nextStep(((App) App.getLastInstance()).getFingerTable(), myId, id);
}
} else {
if (id <= myId || id > remoteId) {
value = "+" + ((App) App.getLastInstance()).getData().size();
} else {
value = Util.nextStep(((App) App.getLastInstance()).getFingerTable(), myId, id);
}
}
return value;
}
private String find(int id, String key, String remoteIp) {
String value = ((App) App.getLastInstance()).getData().get(key);
if (value != null) {
value = "+" + value;
} else {
int remoteId = Util.getId(remoteIp);
if (remoteId < myId) {
if (id <= myId) {
value = "--";
} else {
value = Util.nextStep(((App) App.getLastInstance()).getFingerTable(), myId, id);
}
} else {
if (id <= myId || id > remoteId) {
value = "--";
} else {
value = Util.nextStep(((App) App.getLastInstance()).getFingerTable(), myId, id);
}
}
}
return value;
}
