public void AddToTransactionLog(TransactionLogItem item)
{
lock (TransactionLog)
{
TransactionLog.Add(item);
}
}
//this method uses a global lock
// Creates a transaction (initial outcome state = false) then locks the bank to perform a transfer (accounts are not locked)
public bool PerformTransactionBankLock(Account sourceAccount, Account destinationAccount, int sum)
{
bool transferFinished = false;
/*if (TransactionIdCounter % 100000 == 0)
* {
* lock (this)
* {
* PerformeChecks();
* }
* }*/
var transaction = new TransactionLogItem(
TransactionIdCounter,
sourceAccount.AccountId,
destinationAccount.AccountId,
sum,
false);
if (sourceAccount.AccountId == destinationAccount.AccountId)
{
throw new TransactionException("Cannot perform a transfer into the same account.");
}
if (sum < 0)
{
throw new TransactionException("Transaction sum is negative.");
}
lock (this)
{
transferFinished = TransferFundsSimple(sourceAccount, destinationAccount, sum);
}
if (transferFinished == false)
{
this.AddToAllLogs(transaction, this, sourceAccount, destinationAccount);
lock (this)
{
TransactionIdCounter++;
}
return(false);
}
else
{
transaction.Outcome = true;
this.AddToAllLogs(transaction, this, sourceAccount, destinationAccount);
lock (this)
{
TransactionIdCounter++;
}
return(true);
}
}
public void GiveMoney(Account destinationAccount, int sum)
{
destinationAccount.Balance += sum;
// logging the transaction : sourceId = 0 -> money from the bank
var transaction = new TransactionLogItem(
TransactionIdCounter, 0, destinationAccount.AccountId, sum, true);
this.AddToAllLogs(transaction, this, destinationAccount);
TransactionIdCounter++;
}
private void AddToAllLogs(TransactionLogItem transaction, params Loggable[] logs)
{
foreach (var log in logs)
{
log.AddToTransactionLog(new TransactionLogItem(
transaction.TransactionId,
transaction.SourceAccountId,
transaction.DestinationAccountId,
transaction.TransactionSum,
transaction.Outcome));
}
}