public int newCustomer(int id) throws RemoteException {
Trace.info("INFO: RM::newCustomer(" + id + ") called");
// Generate a globally unique ID for the new customer
int cid =
Integer.parseInt(
String.valueOf(id)
+ String.valueOf(Calendar.getInstance().get(Calendar.MILLISECOND))
+ String.valueOf(Math.round(Math.random() * 100 + 1)));
Customer cust = new Customer(cid);
writeData(id, cust.getKey(), cust);
Customer temp = cust.clone();
temp.setID(-1);
temp.setType(1);
writeDataToLog(id, cust.getKey(), temp);
Trace.info("RM::newCustomer(" + cid + ") returns ID=" + cid);
return cid;
}
// deletes the entire item
protected boolean deleteItem(int id, String key) {
Trace.info("RM::deleteItem(" + id + ", " + key + ") called");
ReservableItem curObj = (ReservableItem) readData(id, key);
Flight tempItem =
new Flight(Integer.parseInt(curObj.getLocation()), curObj.getCount(), curObj.getPrice());
tempItem.setReserved(curObj.getReserved());
// Check if there is such an item in the storage
if (curObj == null) {
Trace.warn("RM::deleteItem(" + id + ", " + key + ") failed--item doesn't exist");
return false;
} else {
if (curObj.getReserved() == 0) {
tempItem.setType(0);
writeDataToLog(id, curObj.getKey(), tempItem);
removeData(id, curObj.getKey());
Trace.info("RM::deleteItem(" + id + ", " + key + ") item deleted");
return true;
} else {
Trace.info(
"RM::deleteItem("
+ id
+ ", "
+ key
+ ") item can't be deleted because some customers reserved it");
return false;
}
} // if
}
// Delete the entire item.
protected boolean deleteItem(int id, String key) {
Trace.info("RM::deleteItem(" + id + ", " + key + ") called.");
synchronized (syncLock) {
ReservableItem curObj = (ReservableItem) readData(id, key);
// Check if there is such an item in the storage.
if (curObj == null) {
Trace.warn("RM::deleteItem(" + id + ", " + key + ") failed: " + " item doesn't exist.");
return false;
} else {
if (curObj.getReserved() == 0) {
removeData(id, curObj.getKey());
Trace.info("RM::deleteItem(" + id + ", " + key + ") OK.");
return true;
} else {
Trace.info(
"RM::deleteItem("
+ id
+ ", "
+ key
+ ") failed: "
+ "some customers have reserved it.");
return false;
}
}
}
}
public void run() {
try {
ObjectOutputStream outputStream = new ObjectOutputStream(_clientSocket.getOutputStream());
outputStream.flush();
DataInputStream inputStream = new DataInputStream(_clientSocket.getInputStream());
while (true) {
String request = inputStream.readUTF();
Trace.info("Received request: " + request);
RMResult response = processIfComposite(request);
if (response == null) {
response = processIfCIDRequired(request);
if (response == null) {
response = processAtomicRequest(request);
}
}
outputStream.writeObject(response);
outputStream.flush();
}
} catch (EOFException eof) {
Trace.info("A client closed a connection.");
} catch (IOException e) {
e.printStackTrace();
}
}
// 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
}
// Create a new flight, or add seats to existing flight
// NOTE: if flightPrice <= 0 and the flight already exists, it maintains its current price
public boolean addFlight(int id, int flightNum, int flightSeats, int flightPrice)
throws RemoteException, InvalidTransactionException, TransactionAbortedException {
Trace.info(
"RM::addFlight("
+ id
+ ", "
+ flightNum
+ ", $"
+ flightPrice
+ ", "
+ flightSeats
+ ") called");
Flight curObj = (Flight) readData(id, Flight.getKey(flightNum));
if (curObj == null) {
// doesn't exist...add it
Flight newObj = new Flight(flightNum, flightSeats, flightPrice);
writeData(id, newObj.getKey(), newObj);
String key = newObj.getKey();
if (readDataFromLog(id, key, id) == null) {
Flight logObj = (Flight) newObj.clone();
logObj.setCount(-1);
logObj.type = 0;
writeDataToLog(id, key, logObj);
}
Trace.info(
"RM::addFlight("
+ id
+ ") created new flight "
+ flightNum
+ ", seats="
+ flightSeats
+ ", price=$"
+ flightPrice);
} else {
// add seats to existing flight and update the price...
Flight logObj = (Flight) curObj.clone();
if (readDataFromLog(id, curObj.getKey(), id) == null)
writeDataToLog(id, curObj.getKey(), logObj);
curObj.setCount(curObj.getCount() + flightSeats);
if (flightPrice > 0) {
curObj.setPrice(flightPrice);
} // if
writeData(id, curObj.getKey(), curObj);
Trace.info(
"RM::addFlight("
+ id
+ ") modified existing flight "
+ flightNum
+ ", seats="
+ curObj.getCount()
+ ", price=$"
+ flightPrice);
} // else
return (true);
}
// Delete customer from the database.
@Override
public boolean deleteCustomer(int id, int customerId) {
Trace.info("RM::deleteCustomer(" + id + ", " + customerId + ") called.");
synchronized (syncLock) {
Customer cust = (Customer) readData(id, Customer.getKey(customerId));
removeData(id, cust.getKey());
Trace.info("RM::deleteCustomer(" + id + ", " + customerId + ") OK.");
return true;
}
}
// query the price of an item
protected int queryPrice(int id, String key) {
Trace.info("RM::queryCarsPrice(" + id + ", " + key + ") called");
ReservableItem curObj = (ReservableItem) readData(id, key);
int value = 0;
if (curObj != null) {
value = curObj.getPrice();
} // else
Trace.info("RM::queryCarsPrice(" + id + ", " + key + ") returns cost=$" + value);
return value;
}
// Create a new flight, or add seats to existing flight.
// Note: if flightPrice <= 0 and the flight already exists, it maintains
// its current price.
@Override
public boolean addFlight(int id, int flightNumber, int numSeats, int flightPrice) {
Trace.info(
"RM::addFlight("
+ id
+ ", "
+ flightNumber
+ ", $"
+ flightPrice
+ ", "
+ numSeats
+ ") called.");
Flight curObj = (Flight) readData(id, Flight.getKey(flightNumber));
synchronized (syncLock) {
if (curObj == null) {
// Doesn't exist; add it.
Flight newObj = new Flight(flightNumber, numSeats, flightPrice);
writeData(id, newObj.getKey(), newObj);
Trace.info(
"RM::addFlight("
+ id
+ ", "
+ flightNumber
+ ", $"
+ flightPrice
+ ", "
+ numSeats
+ ") OK.");
} else {
// Add seats to existing flight and update the price.
curObj.setCount(curObj.getCount() + numSeats);
if (flightPrice > 0) {
curObj.setPrice(flightPrice);
}
writeData(id, curObj.getKey(), curObj);
Trace.info(
"RM::addFlight("
+ id
+ ", "
+ flightNumber
+ ", $"
+ flightPrice
+ ", "
+ numSeats
+ ") OK: "
+ "seats = "
+ curObj.getCount()
+ ", price = $"
+ flightPrice);
}
return (true);
}
}
// Query the price of an item.
protected int queryPrice(int id, String key) {
Trace.info("RM::queryPrice(" + id + ", " + key + ") called.");
synchronized (syncLock) {
ReservableItem curObj = (ReservableItem) readData(id, key);
int value = 0;
if (curObj != null) {
value = curObj.getPrice();
}
Trace.info("RM::queryPrice(" + id + ", " + key + ") OK: $" + value);
return value;
}
}
@Override
public int newCustomer(int id) {
Trace.info("INFO: RM::newCustomer(" + id + ") called.");
// Generate a globally unique Id for the new customer.
int customerId =
Integer.parseInt(
String.valueOf(id)
+ String.valueOf(Calendar.getInstance().get(Calendar.MILLISECOND))
+ String.valueOf(Math.round(Math.random() * 100 + 1)));
Customer cust = new Customer(customerId);
writeData(id, cust.getKey(), cust);
Trace.info("RM::newCustomer(" + id + ") OK: " + customerId);
return customerId;
}
// This method makes testing easier.
@Override
public boolean newCustomerId(int id, int customerId) {
Trace.info("INFO: RM::newCustomer(" + id + ", " + customerId + ") called.");
Customer cust = (Customer) readData(id, Customer.getKey(customerId));
if (cust == null) {
cust = new Customer(customerId);
writeData(id, cust.getKey(), cust);
Trace.info("INFO: RM::newCustomer(" + id + ", " + customerId + ") OK.");
return true;
} else {
Trace.info(
"INFO: RM::newCustomer(" + id + ", " + customerId + ") failed: customer already exists.");
return false;
}
}
// return a bill
public String queryCustomerInfo(int id, int customerID) throws RemoteException {
Trace.info("RM::queryCustomerInfo(" + id + ", " + customerID + ") called");
Customer cust = (Customer) readData(id, Customer.getKey(customerID));
if (cust == null) {
Trace.warn(
"RM::queryCustomerInfo(" + id + ", " + customerID + ") failed--customer doesn't exist");
return ""; // NOTE: don't change this--WC counts on this value indicating a customer does not
// exist...
} else {
String s = cust.printBill();
Trace.info("RM::queryCustomerInfo(" + id + ", " + customerID + "), bill follows...");
System.out.println(s);
return s;
} // if
}
public MbeanGenerator(ResourceManager mgr, MibNode aGroup, Context ctxt) throws IOException {
super(mgr, aGroup, ctxt);
gentype = ctxt.gentype;
// Specify oid of the current bean ...
//
oid = node.getComputedOid();
// Try to find a symbol to associate to the group
//
varName = node.getSymbolName();
if (varName == null) varName = getClassName(node.getComputedOid());
symboleName = getNodeSymbolName(node);
Trace.info(MessageHandler.getMessage("generate.info.var", varName));
// Open the file which will represent the M-bean.
//
out = openFile(symboleName + Def.JAVA);
// Write generic header ...
//
writeHeader();
// write our own header ...
//
writeClassDeclaration();
// write the beginning of the constructor
//
buildConstructorHeader();
}
// Return data structure containing customer reservation info.
// Returns null if the customer doesn't exist.
// Returns empty RMHashtable if customer exists but has no reservations.
public RMHashtable getCustomerReservations(int id, int customerId) {
Trace.info("RM::getCustomerReservations(" + id + ", " + customerId + ") called.");
synchronized (syncLock) {
Customer cust = (Customer) readData(id, Customer.getKey(customerId));
if (cust == null) {
Trace.info(
"RM::getCustomerReservations("
+ id
+ ", "
+ customerId
+ ") failed: customer doesn't exist.");
return null;
} else {
return cust.getReservations();
}
}
}
// I opted to pass in customerID instead. This makes testing easier
public boolean newCustomer(int id, int customerID) throws RemoteException {
Trace.info("INFO: RM::newCustomer(" + id + ", " + customerID + ") called");
Customer cust = (Customer) readData(id, Customer.getKey(customerID));
if (cust == null) {
cust = new Customer(customerID);
writeData(id, cust.getKey(), cust);
Customer temp = cust.clone();
temp.setType(1);
temp.setID(-1);
writeDataToLog(id, cust.getKey(), temp);
Trace.info("INFO: RM::newCustomer(" + id + ", " + customerID + ") created a new customer");
return true;
} else {
Trace.info(
"INFO: RM::newCustomer(" + id + ", " + customerID + ") failed--customer already exists");
return false;
} // else
}
public void start(int backoff, long lastConnect) {
if (state.getAndSet(State.STARTING) == State.STARTING) {
Trace.debug("In the process of starting watch already. Returning early");
return;
}
this.backoff = backoff;
this.lastConnect = lastConnect;
Trace.info("Starting watch on project {0} for kind {1}", project.getName(), kind);
IClient client = getClientFor(project);
if (client != null) {
new RestartWatchJob(client).schedule();
}
}
// Return a bill.
@Override
public String queryCustomerInfo(int id, int customerId) {
Trace.info("RM::queryCustomerInfo(" + id + ", " + customerId + ") called.");
synchronized (syncLock) {
Customer cust = (Customer) readData(id, Customer.getKey(customerId));
if (cust == null) {
Trace.warn(
"RM::queryCustomerInfo("
+ id
+ ", "
+ customerId
+ ") failed: customer doesn't exist.");
// Returning an empty bill means that the customer doesn't exist.
return "";
} else {
String s = cust.printBill();
Trace.info("RM::queryCustomerInfo(" + id + ", " + customerId + "): \n");
System.out.println(s);
return s;
}
}
}
// Create a new car location or add cars to an existing location.
// Note: if price <= 0 and the car location already exists, it maintains
// its current price.
@Override
public boolean addCars(int id, String location, int numCars, int carPrice) {
Trace.info(
"RM::addCars(" + id + ", " + location + ", " + numCars + ", $" + carPrice + ") called.");
synchronized (syncLock) {
Car curObj = (Car) readData(id, Car.getKey(location));
if (curObj == null) {
// Doesn't exist; add it.
Car newObj = new Car(location, numCars, carPrice);
writeData(id, newObj.getKey(), newObj);
Trace.info(
"RM::addCars(" + id + ", " + location + ", " + numCars + ", $" + carPrice + ") OK.");
} else {
// Add count to existing object and update price.
curObj.setCount(curObj.getCount() + numCars);
if (carPrice > 0) {
curObj.setPrice(carPrice);
}
writeData(id, curObj.getKey(), curObj);
Trace.info(
"RM::addCars("
+ id
+ ", "
+ location
+ ", "
+ numCars
+ ", $"
+ carPrice
+ ") OK: "
+ "cars = "
+ curObj.getCount()
+ ", price = $"
+ carPrice);
}
return (true);
}
}
// Create a new room location or add rooms to an existing location.
// Note: if price <= 0 and the room location already exists, it maintains
// its current price.
@Override
public boolean addRooms(int id, String location, int numRooms, int roomPrice) {
Trace.info(
"RM::addRooms(" + id + ", " + location + ", " + numRooms + ", $" + roomPrice + ") called.");
Room curObj = (Room) readData(id, Room.getKey(location));
synchronized (syncLock) {
if (curObj == null) {
// Doesn't exist; add it.
Room newObj = new Room(location, numRooms, roomPrice);
writeData(id, newObj.getKey(), newObj);
Trace.info(
"RM::addRooms(" + id + ", " + location + ", " + numRooms + ", $" + roomPrice + ") OK.");
} else {
// Add count to existing object and update price.
curObj.setCount(curObj.getCount() + numRooms);
if (roomPrice > 0) {
curObj.setPrice(roomPrice);
}
writeData(id, curObj.getKey(), curObj);
Trace.info(
"RM::addRooms("
+ id
+ ", "
+ location
+ ", "
+ numRooms
+ ", $"
+ roomPrice
+ ") OK: "
+ "rooms = "
+ curObj.getCount()
+ ", price = $"
+ roomPrice);
}
return (true);
}
}
// Returns data structure containing customer reservation info. Returns null if the
// customer doesn't exist. Returns empty RMHashtable if customer exists but has no
// reservations.
public RMHashtable getCustomerReservations(int id, int customerID) throws RemoteException {
Trace.info("RM::getCustomerReservations(" + id + ", " + customerID + ") called");
Customer cust = (Customer) readData(id, Customer.getKey(customerID));
if (cust == null) {
Trace.warn(
"RM::getCustomerReservations failed("
+ id
+ ", "
+ customerID
+ ") failed--customer doesn't exist");
return null;
} else {
return cust.getReservations();
} // if
}
@Override
protected IStatus run(IProgressMonitor monitor) {
try {
connect(client);
} catch (Exception e) {
Trace.debug(
"Exception starting watch on project {0} and {1} kind", e, project.getName(), kind);
backoff++;
if (backoff >= FIBONACCI.length) {
Trace.info(
"Exceeded backoff attempts trying to reconnect watch for {0} and kind {1}",
project.getName(), kind);
watches.remove(project);
state.set(State.DISCONNECTED);
return Status.OK_STATUS;
}
final long delay = FIBONACCI[backoff] * BACKOFF_MILLIS;
Trace.debug(
"Delaying watch restart by {0}ms for project {1} and kinds {2} ",
delay, project.getName(), kind);
new RestartWatchJob(client).schedule(delay);
}
return Status.OK_STATUS;
}
// reserve an item
protected boolean reserveItem(int id, int customerID, String key, String location) {
Trace.info(
"RM::reserveItem( "
+ id
+ ", customer="
+ customerID
+ ", "
+ key
+ ", "
+ location
+ " ) called");
// Read customer object if it exists (and read lock it)
Customer cust = (Customer) readData(id, Customer.getKey(customerID));
if (cust == null) {
Trace.warn(
"RM::reserveCar( "
+ id
+ ", "
+ customerID
+ ", "
+ key
+ ", "
+ location
+ ") failed--customer doesn't exist");
return false;
}
// check if the item is available
ReservableItem item = (ReservableItem) readData(id, key);
if (item == null) {
Trace.warn(
"RM::reserveItem( "
+ id
+ ", "
+ customerID
+ ", "
+ key
+ ", "
+ location
+ ") failed--item doesn't exist");
return false;
} else if (item.getCount() == 0) {
Trace.warn(
"RM::reserveItem( "
+ id
+ ", "
+ customerID
+ ", "
+ key
+ ", "
+ location
+ ") failed--No more items");
return false;
} else {
Flight tempItem =
new Flight(Integer.parseInt(item.getLocation()), item.getCount(), item.getPrice());
tempItem.setReserved(item.getReserved());
Customer temp = cust.clone();
temp.setType(1);
if (readDataFromLog(id, cust.getKey(), id) == null) {
writeDataToLog(id, cust.getKey(), temp);
}
cust.reserve(key, location, item.getPrice());
writeData(id, cust.getKey(), cust);
// decrease the number of available items in the storage
item.setCount(item.getCount() - 1);
item.setReserved(item.getReserved() + 1);
if (readDataFromLog(id, item.getKey(), id) == null) {
tempItem.setType(0);
writeDataToLog(id, item.getKey(), tempItem);
}
Trace.info(
"RM::reserveItem( "
+ id
+ ", "
+ customerID
+ ", "
+ key
+ ", "
+ location
+ ") succeeded");
return true;
}
}
