// Returns price of cars at this location
public ReturnTuple<Integer> queryCarsPrice(int id, String location, Timestamp timestamp)
throws RemoteException, TransactionAbortedException, InvalidTransactionException {
if (!isMaster) {
System.out.println("Slave retransmitting queryCarsPrice to master");
return this.getMaster().queryCarsPrice(id, location, timestamp);
} else {
QueryCarsPriceRMICommand qcp = new QueryCarsPriceRMICommand(roomGroup, id, location);
qcp.setTimestampObject(timestamp);
ReturnTuple<Integer> result = null;
try {
overseer.validTransaction(id);
lm.Lock(id, Car.getKey(location), qcp.getRequiredLock());
qcp.execute();
result = qcp.price;
} catch (DeadlockException d) {
timestamp.stamp();
overseer.abort(id);
timestamp.stamp();
throw new TransactionAbortedException(timestamp);
} catch (TransactionAbortedException tae) {
tae.t = timestamp;
throw tae;
} catch (InvalidTransactionException ite) {
ite.t = timestamp;
throw ite;
}
result.timestamp.stamp();
return result;
}
}
// Delete cars from a location
public ReturnTuple<Boolean> deleteCars(int id, String location, Timestamp timestamp)
throws RemoteException, TransactionAbortedException, InvalidTransactionException {
if (!isMaster) {
System.out.println("Slave retransmitting deleteCars to master");
return this.getMaster().deleteCars(id, location, timestamp);
} else {
timestamp.stamp();
DeleteCarsRMICommand dc = new DeleteCarsRMICommand(carGroup, id, location);
dc.setTimestampObject(timestamp);
ReturnTuple<Boolean> result = null;
try {
overseer.validTransaction(id);
lm.Lock(id, Car.getKey(location), dc.getRequiredLock());
dc.execute();
result = dc.success;
if (result.result) overseer.addCommandToTransaction(id, dc);
} catch (DeadlockException d) {
timestamp.stamp();
overseer.abort(id);
timestamp.stamp();
throw new TransactionAbortedException(timestamp);
} catch (TransactionAbortedException tae) {
tae.t = timestamp;
throw tae;
} catch (InvalidTransactionException ite) {
ite.t = timestamp;
throw ite;
}
result.timestamp.stamp();
return result;
}
}
// return a bill
public ReturnTuple<String> queryCustomerInfo(int id, int customerID, Timestamp timestamp)
throws RemoteException, TransactionAbortedException, InvalidTransactionException {
if (!isMaster) {
System.out.println("Slave retransmitting queryCustomerInfo to master");
return this.getMaster().queryCustomerInfo(id, customerID, timestamp);
} else {
timestamp.stamp();
QueryCustomerInfoRMICommand qci =
new QueryCustomerInfoRMICommand(carGroup, flightGroup, roomGroup, id, customerID);
qci.setTimestampObject(timestamp);
ReturnTuple<String> result = null;
try {
Vector<Integer> flightNos;
Vector<String> locations;
overseer.validTransaction(id);
lm.Lock(id, Customer.getKey(customerID), qci.getRequiredLock());
qci.execute();
flightNos = qci.getCustomerFlightReservations();
for (int flightNo : flightNos) {
lm.Lock(id, Flight.getKey(flightNo), qci.getRequiredLock());
}
locations = qci.getCustomerRoomReservations();
for (String location : locations) {
lm.Lock(id, Hotel.getKey(location), qci.getRequiredLock());
}
locations = qci.getCustomerCarReservations();
for (String location : locations) {
lm.Lock(id, Car.getKey(location), qci.getRequiredLock());
}
qci.execute();
result = qci.customerInfo;
} catch (DeadlockException d) {
timestamp.stamp();
overseer.abort(id);
timestamp.stamp();
throw new TransactionAbortedException(timestamp);
} catch (TransactionAbortedException tae) {
tae.t = timestamp;
throw tae;
} catch (InvalidTransactionException ite) {
ite.t = timestamp;
throw ite;
}
result.timestamp.stamp();
return result;
}
}