/// <summary>
/// Gets a <see cref="UnitOfWorkScopeTransaction"/> instance that can be used by a <see cref="UnitOfWorkScope"/> instance.
/// </summary>
/// <param name="scope">The <see cref="UnitOfWorkScope"/> instance that is requesting the transaction.</param>
/// <param name="isolationLevel">One of the values of <see cref="IsolationLevel"/> that specifies the transaction isolation level.</param>
/// <param name="options">One of the values of <see cref="UnitOfWorkScopeTransactionOptions"/> that specifies options for using existing
/// transacitons or creating new ones.</param>
/// <returns>A <see cref="UnitOfWorkScopeTransaction"/> instance.</returns>
public static UnitOfWorkScopeTransaction GetTransactionForScope(UnitOfWorkScope scope,
IsolationLevel isolationLevel,
UnitOfWorkScopeTransactionOptions options)
{
var useCompatibleTx = (options & UnitOfWorkScopeTransactionOptions.UseCompatible) ==
UnitOfWorkScopeTransactionOptions.UseCompatible;
var createNewTx = (options & UnitOfWorkScopeTransactionOptions.CreateNew) ==
UnitOfWorkScopeTransactionOptions.CreateNew;
Guard.Against <InvalidOperationException>(useCompatibleTx && createNewTx,
"Cannot start a transaction with both UseCompatible and CreateNew specified " +
"as a UnitOfWorkScopeTransactionOptions");
if (options == UnitOfWorkScopeTransactionOptions.UseCompatible)
{
var transaction = (from t in CurrentTransactions
where t.IsolationLevel == isolationLevel
select t).FirstOrDefault();
if (transaction != null)
{
transaction.AttachScope(scope);
return(transaction);
}
}
var factory = ServiceLocator.Current.GetInstance <IUnitOfWorkFactory>();
var newTransaction = new UnitOfWorkScopeTransaction(factory, isolationLevel);
newTransaction.AttachScope(scope);
CurrentTransactions.AddFirst(newTransaction);
return(newTransaction);
}
/// <summary>
/// Overloaded Constructor.
/// Creates a new instance of <see cref="UnitOfWorkScope"/> with the specified transaction isolation level, option connection and
/// a transaction option that specifies if an existing transaction should be used or to create a new transaction.
/// </summary>
/// <param name="isolationLevel"></param>
/// <param name="transactionOptions"></param>
public UnitOfWorkScope(IsolationLevel isolationLevel, UnitOfWorkScopeTransactionOptions transactionOptions)
{
_disposed = false;
_autoComplete = (transactionOptions & UnitOfWorkScopeTransactionOptions.AutoComplete) ==
UnitOfWorkScopeTransactionOptions.AutoComplete;
_currentTransaction = UnitOfWorkScopeTransaction.GetTransactionForScope(this, isolationLevel,
transactionOptions);
RegisterScope(this);
}
/// <summary>
/// Gets a <see cref="UnitOfWorkScopeTransaction"/> instance that can be used by a <see cref="UnitOfWorkScope"/> instance.
/// </summary>
/// <param name="scope">The <see cref="UnitOfWorkScope"/> instance that is requesting the transaction.</param>
/// <param name="isolationLevel">One of the values of <see cref="IsolationLevel"/> that specifies the transaction isolation level.</param>
/// <param name="options">One of the values of <see cref="UnitOfWorkScopeTransactionOptions"/> that specifies options for using existing
/// transacitons or creating new ones.</param>
/// <returns>A <see cref="UnitOfWorkScopeTransaction"/> instance.</returns>
public static UnitOfWorkScopeTransaction GetTransactionForScope(UnitOfWorkScope scope,
IsolationLevel isolationLevel,
UnitOfWorkScopeTransactionOptions options)
{
var useCompatibleTx = (options & UnitOfWorkScopeTransactionOptions.UseCompatible) ==
UnitOfWorkScopeTransactionOptions.UseCompatible;
var createNewTx = (options & UnitOfWorkScopeTransactionOptions.CreateNew) ==
UnitOfWorkScopeTransactionOptions.CreateNew;
Guard.Against<InvalidOperationException>(useCompatibleTx && createNewTx,
"Cannot start a transaction with both UseCompatible and CreateNew specified " +
"as a UnitOfWorkScopeTransactionOptions");
if (options == UnitOfWorkScopeTransactionOptions.UseCompatible)
{
var transaction = (from t in CurrentTransactions
where t.IsolationLevel == isolationLevel
select t).FirstOrDefault();
if (transaction != null)
{
transaction.AttachScope(scope);
return transaction;
}
}
var factory = ServiceLocator.Current.GetInstance<IUnitOfWorkFactory>();
var newTransaction = new UnitOfWorkScopeTransaction(factory, isolationLevel);
newTransaction.AttachScope(scope);
CurrentTransactions.AddFirst(newTransaction);
return newTransaction;
}
/// <summary>
/// Overloaded Constructor.
/// Creates a new instance of the <see cref="UnitOfWorkScope"/> with the
/// specified <see cref="UnitOfWorkScopeTransactionOptions"/> and default <see cref="IsolationLevel"/>
/// </summary>
/// <param name="options"></param>
public UnitOfWorkScope(UnitOfWorkScopeTransactionOptions options) : this(GetScopeIsolationLevel(), options)
{
}
/// <summary>
/// Overloaded Constructor.
/// Creates a new instance of <see cref="UnitOfWorkScope"/> with the specified transaction isolation level, option connection and
/// a transaction option that specifies if an existing transaction should be used or to create a new transaction.
/// </summary>
/// <param name="isolationLevel"></param>
/// <param name="transactionOptions"></param>
public UnitOfWorkScope(IsolationLevel isolationLevel, UnitOfWorkScopeTransactionOptions transactionOptions)
{
_disposed = false;
_autoComplete = (transactionOptions & UnitOfWorkScopeTransactionOptions.AutoComplete) ==
UnitOfWorkScopeTransactionOptions.AutoComplete;
_currentTransaction = UnitOfWorkScopeTransaction.GetTransactionForScope(this, isolationLevel,
transactionOptions);
RegisterScope(this);
}
/// <summary>
/// Overloaded Constructor.
/// Creates a new instance of the <see cref="UnitOfWorkScope"/> with the
/// specified <see cref="UnitOfWorkScopeTransactionOptions"/> and default <see cref="IsolationLevel"/>
/// </summary>
/// <param name="options"></param>
public UnitOfWorkScope(UnitOfWorkScopeTransactionOptions options)
: this(GetScopeIsolationLevel(), options)
{
}
