public synchronized String transferFromBankToPlayer(Request request, Response response) {
lamport.Add();
if (banks.containsKey(request.params(":gameid"))) {
Collection<Account> accounts = banks.get(request.params(":gameid"));
for (Account account : accounts) {
if (account.getPlayer().getId().equals(request.params(":to"))) {
int am = Integer.parseInt(request.params(":amount"));
account.AddAmount(am);
banks.put(request.params(":gameid"), accounts);
String uri = localUri + "transfers/" + UniqueId++;
Transfer trans =
new Transfer(
request.params(":from"), request.params(":to"), am, request.body(), "", uri);
Event event =
new Event(
"bank transfer",
request.body(),
request.body(),
uri,
account.getPlayer().getId());
transfers.add(trans);
BanksService.sendUpdate(trans, request.params(":gameid"));
response.status(201);
return gson.toJson(event);
}
}
response.status(404);
return "Player not found.";
} else {
response.status(404);
return "Game not found.";
}
}
public static synchronized void sendUpdate(Transfer trans, String gameid) {
lamport.Add();
try {
Transaction transaction = new Transaction(trans, lamport.getTime());
transfers.add(trans);
transactions.add(transaction);
String tmp = gson.toJson(trans);
Unirest.post(replication + "/sync/" + gameid)
.header("Content-Type", "application/json")
.body(tmp)
.asString();
} catch (UnirestException e) {
System.out.println("Konnte Dienste nicht synchronisieren.");
e.printStackTrace();
}
}
public synchronized String updateAccounts(Request request, Response response) {
Transaction json = gson.fromJson(request.body(), Transaction.class);
if (json.getTimestamp() > lamport.getTime()) {
lamport.Update(json.getTimestamp());
lamport.Add();
Unirest.get(replication + "/sync/all");
return "replacing database.";
} else {
lamport.Add();
for (Transaction transaction : transactions) {
if (transaction.getTransfer().equals(json.getTransfer())
&& transaction.getTimestamp() == json.getTimestamp()) {
return "failure, transfer already exists.";
}
}
if (banks.containsKey(request.params(":gameid"))) {
Collection<Account> accounts = banks.get(request.params(":gameid"));
for (Account account : accounts) {
if (account.getPlayer().getId().equals(request.params(":from"))) {
int am = Integer.parseInt(request.params(":amount"));
if (account.getSaldo() >= am) {
account.SubtractAmount(am);
banks.put(request.params(":gameid"), accounts);
String uri = localUri + "transfers/" + UniqueId++;
Transfer trans =
new Transfer(
request.params(":from"), request.params(":to"), am, request.body(), "", uri);
Event event =
new Event(
"bank transfer",
request.body(),
request.body(),
uri,
account.getPlayer().getId());
transfers.add(trans);
Transaction transaction = new Transaction(trans, lamport.getTime());
transactions.add(transaction);
BanksService.sendUpdate(trans, request.params(":gameid"));
response.status(201);
return gson.toJson(event);
} else {
response.status(403);
return "Insufficent funds.";
}
}
}
response.status(404);
return "Player not found.";
}
// from Bank to Player
else if (json.getTransfer().getFrom().equals("bank")) {
if (banks.containsKey(request.params(":gameid"))) {
Collection<Account> accounts = banks.get(request.params(":gameid"));
for (Account account : accounts) {
if (account.getPlayer().getId().equals(request.params(":to"))) {
int am = Integer.parseInt(request.params(":amount"));
account.AddAmount(am);
banks.put(request.params(":gameid"), accounts);
String uri = localUri + "transfers/" + UniqueId++;
Transfer trans =
new Transfer(
request.params(":from"), request.params(":to"), am, request.body(), "", uri);
Event event =
new Event(
"bank transfer",
request.body(),
request.body(),
uri,
account.getPlayer().getId());
transfers.add(trans);
BanksService.sendUpdate(trans, request.params(":gameid"));
response.status(201);
return gson.toJson(event);
}
}
response.status(404);
return "Player not found.";
}
// from Player to Player
else {
Collection<Event> events = new ArrayList<Event>();
boolean transactionSuccessful = false;
Transfer trans = null;
Collection<Account> accounts = banks.get(request.params(":gameid"));
Collection<Account> copy = new ArrayList<>();
copy.addAll(accounts);
for (Account account : copy) {
if (account.getPlayer().getId().equals(request.params(":from"))) {
int am = Integer.parseInt(request.params(":amount"));
if (account.getSaldo() >= am) {
account.SubtractAmount(am);
break;
} else {
response.status(403);
return "Insufficent funds.";
}
}
}
for (Account account : copy) {
if (account.getPlayer().getId().equals(request.params(":to"))) {
int am = Integer.parseInt(request.params(":amount"));
account.AddAmount(am);
String uri = localUri + "transfers/" + UniqueId++;
trans =
new Transfer(
request.params(":from"), request.params(":to"), am, request.body(), "", uri);
Event event =
new Event(
"bank transfer",
request.body(),
request.body(),
uri,
account.getPlayer().getId());
events.add(event);
transactionSuccessful = true;
}
}
if (transactionSuccessful) {
// transfer was successful, time to "commit" the changes!
banks.put(request.params(":gameid"), copy);
transfers.add(trans);
Transaction transaction = new Transaction(trans, lamport.getTime());
transactions.add(transaction);
BanksService.sendUpdate(trans, request.params(":gameid"));
response.status(201);
return gson.toJson(events);
} else {
// OH OH! Something went wrong! But we actually didn't change anything, so we're good.
response.status(404);
return "Player not found.";
}
}
} else {
return "Game not found.";
}
}
}
