// Deletes customer from the database.
public boolean deleteCustomer(int id, int customerID) throws RemoteException {
Trace.info("RM::deleteCustomer(" + id + ", " + customerID + ") called");
Customer cust = (Customer) readData(id, Customer.getKey(customerID));
if (cust == null) {
Trace.warn(
"RM::deleteCustomer(" + id + ", " + customerID + ") failed--customer doesn't exist");
return false;
} else {
Customer temp = cust.clone();
// Increase the reserved numbers of all reservable items which the customer reserved.
RMHashtable reservationHT = cust.getReservations();
for (Enumeration e = reservationHT.keys(); e.hasMoreElements(); ) {
String reservedkey = (String) (e.nextElement());
ReservedItem reserveditem = cust.getReservedItem(reservedkey);
Trace.info(
"RM::deleteCustomer("
+ id
+ ", "
+ customerID
+ ") has reserved "
+ reserveditem.getKey()
+ " "
+ reserveditem.getCount()
+ " times");
ReservableItem item = (ReservableItem) readData(id, reserveditem.getKey());
Trace.info(
"RM::deleteCustomer("
+ id
+ ", "
+ customerID
+ ") has reserved "
+ reserveditem.getKey()
+ "which is reserved"
+ item.getReserved()
+ " times and is still available "
+ item.getCount()
+ " times");
Flight tempItem =
new Flight(Integer.parseInt(item.getLocation()), item.getCount(), item.getPrice());
tempItem.setReserved(item.getReserved());
tempItem.setType(0);
item.setReserved(item.getReserved() - reserveditem.getCount());
item.setCount(item.getCount() + reserveditem.getCount());
if (readDataFromLog(id, item.getKey(), id) == null)
writeDataToLog(id, item.getKey(), tempItem);
}
// remove the customer from the storage
temp.setType(1);
if (readDataFromLog(id, cust.getKey(), id) == null) writeDataToLog(id, cust.getKey(), temp);
removeData(id, cust.getKey());
Trace.info("RM::deleteCustomer(" + id + ", " + customerID + ") succeeded");
return true;
} // if
}
// Remove the item out of storage
protected RMItem removeData(int id, String key) {
synchronized (m_itemHT) {
return (RMItem) m_itemHT.remove(key);
}
}
// Writes a data item
private void writeData(int id, String key, RMItem value) {
synchronized (m_itemHT) {
m_itemHT.put(key, value);
}
}
// Reads a data item
private RMItem readData(int id, String key) {
synchronized (m_itemHT) {
return (RMItem) m_itemHT.get(key);
}
}