public int propose(int seq, Operation op) throws RemoteException {
if (!work) return seq;
boolean decided = false;
while (!decided) {
seq++;
ArrayList<KeyValueServerInterface> list = getServersList();
int count = 0;
int max = -1;
for (KeyValueServerInterface server : list) {
Instance ins = server.prepare(op.op_num, seq);
if (ins != null) {
count++;
if (ins.n_a > max) {
max = ins.n_a;
// content = ins.content;
op.content = ins.content;
}
}
}
if (count > (list.size() / 2)) {
if (sendAllAccept(op.op_num, seq, op.content, list)) {
for (KeyValueServerInterface server : list) {
server.decide(seq, op);
}
decided = true;
}
}
}
return seq;
}
public ArrayList<KeyValueServerInterface> getServersList() throws RemoteException {
//
ArrayList<KeyValueServerInterface> res = new ArrayList();
try {
Registry registry = LocateRegistry.getRegistry();
String[] name = registry.list();
for (String str : name) {
// if( str.equals(server_name) ) continue;
KeyValueServerInterface obj = (KeyValueServerInterface) registry.lookup(str);
res.add(obj);
}
} catch (Exception e) {
System.out.println(e.getMessage());
}
return res;
}
public boolean sendAllAccept(
int ins_num, int income_seq, String content, ArrayList<KeyValueServerInterface> list)
throws RemoteException {
int count = 0;
for (KeyValueServerInterface server : list) {
if (server.accept(ins_num, income_seq, content) != -1) count++;
}
if (count > (list.size() / 2)) return true;
return false;
}