/// <summary>
/// Intializes an instance of <see cref="TransactionViewModel"/>.
/// </summary>
/// <param name="entity"></param>
public TransactionViewModel(Transaction entity)
{
if (null == entity)
throw new ArgumentNullException("entity");
Entity = entity;
_amount = Convert.ToString(entity.Amount);
}
/// <summary>
/// Deletes transactions from the persistent database asynchronously.
/// <remarks>
/// If this method is consumed, make sure to hook to the <seealso cref="ITransactionRepository.DeleteTransactionsCompleted"/> event of this instance of <see cref="ITransactionRepository"/>.
/// </remarks>
/// </summary>
/// <param name="transactions">The array of all <see cref="Transaction"/> instances that need to
/// be deleted from the persistence database.</param>
void ITransactionRepository.DeleteTransactionsAsync(Transaction[] transactions)
{
QueueAsyncTask(() =>
{
Exception exception = null;
string message = null;
IList<long> transIds=null;
try
{
//This treachery is for faking a web service call.
Thread.Sleep(2000);
DeleteTransactions(transactions);
LogUtil.LogInfo("TransactionRepository",
"ITransactionRepository.DeleteTransactionsAsync",
"Successfully deleted the trans.");
transIds=transactions.Select(t => t.TransactionId).ToList();
}
catch (Exception ex)
{
LogUtil.LogError("TransactionRepository",
"ITransactionRepository.DeleteTransactionsAsync", ex);
exception = ex;
message = ErrorMessages.ERR_FAILED_TO_DELETE_TRANS;
}
finally
{
if (null != _deleteTransactionsCompleted)
_deleteTransactionsCompleted(this, new DeleteTransactionsFinishedEventArg(exception, message, transIds));
}
});
}
/// <summary>
/// Deletes transactions from the persistent database.
/// </summary>
/// <param name="transactions">The array of all <see cref="Transaction"/> instances that need to
/// be deleted from the persistence database.</param>
void ITransactionRepository.DeleteTransactions(Transaction[] transactions)
{
DeleteTransactions(transactions);
}
/// <summary>
/// Saves a <see cref="Transaction"/> model in persistence database.
/// </summary>
/// <param name="transaction">The transaction tha needs to be saved to the persistent DB.</param>
private void SaveTransaction(Transaction transaction)
{
if (transaction == null)
throw new ArgumentNullException("transaction");
using (var session = SessionProvider.SessionFactory.OpenSession())
{
using (var trans = session.BeginTransaction())
{
session.SaveOrUpdate(transaction);
trans.Commit();
}
}
}
/// <summary>
/// Deletes transactions from the persistent database.
/// </summary>
/// <param name="transactions">The array of all <see cref="Transaction"/> instances that need to
/// be deleted from the persistence database.</param>
private void DeleteTransactions(Transaction[] transactions)
{
if (transactions == null)
throw new ArgumentNullException("transactions");
using (var session = SessionProvider.SessionFactory.OpenSession())
{
using (var trans = session.BeginTransaction())
{
transactions.ForEach(transaction => session.Delete(transaction));
trans.Commit();
}
}
}
/// <summary>
/// Saves a <see cref="Transaction"/> model in persistence database asynchronously.
/// <remarks>
/// If this method is consumed, make sure to hook to the <seealso cref="ITransactionRepository.SaveTransactionCompleted"/> event of this instance of <see cref="ITransactionRepository"/>.
/// </remarks>
/// </summary>
/// <param name="transaction">The <see cref="Transaction"/> that needs to be saved in the persistence database.</param>
void ITransactionRepository.SaveTransactionAsync(Transaction transaction)
{
QueueAsyncTask(() =>
{
Exception exception = null;
string message = null;
try
{
//This treachery is for faking a web service call.
Thread.Sleep(2000);
SaveTransaction(transaction);
LogUtil.LogInfo("TransactionRepository",
"ITransactionRepository.SaveTransactionAsync",
string.Format("Successfully saved the trans: {0}.", transaction.TransactionId));
}
catch (Exception ex)
{
LogUtil.LogError("TransactionRepository",
"ITransactionRepository.SaveTransactionAsync", ex);
exception = ex;
message = ErrorMessages.ERR_FAILED_TO_SAVE_TRANS;
}
finally
{
if (null != _saveTransactionCompleted)
_saveTransactionCompleted(this,
new RepositoryTaskFinishedEventArgs(exception, message));
}
});
}
/// <summary>
/// Saves a <see cref="Transaction"/> model in persistence database.
/// </summary>
/// <param name="transaction">The transaction tha needs to be saved to the persistent DB.</param>
void ITransactionRepository.SaveTransaction(Transaction transaction)
{
SaveTransaction(transaction);
}
/// <summary>
/// Gets a new <see cref="Transaction"/> instance.
/// </summary>
/// <returns></returns>
Transaction ITransactionRepository.GetNewTransaction()
{
var transaction = new Transaction {TransactionDate = DateTime.Now.Date};
return transaction;
}