public void PendingTransactionTest()
{
if (!EnvironmentSupportsTransactions)
{
Assert.Inconclusive("Cannot test in this environment");
return;
}
Assume.That(AmbientTransaction == null, "Leftovers are not expected here");
// thus not allowing to use ambient storage transaction
Repository.Settings.StorageTransactionSettings = StorageTransactionSettings.DisallowJoiningAmbientManaged | StorageTransactionSettings.AlwaysStartNew;
using (var standaloneTransaction = GetStandaloneTransaction())
{
Assume.That(standaloneTransaction != null && standaloneTransaction.IsActive);
using (var scope = StorageTransactionScope.Create(Repository, standaloneTransaction))
{
Assert.IsFalse(scope.IsNullScope);
Assert.IsFalse(scope.IsTransactionOwner);
Assert.IsFalse(scope.NoTransaction);
Assert.AreSame(standaloneTransaction, scope.UnderlyingTransaction);
}
Assert.IsTrue(standaloneTransaction.IsActive);
Assert.IsNull(AmbientTransaction);
}
}
public void DetachTransactionTest()
{
if (!EnvironmentSupportsTransactions)
{
Assert.Inconclusive("Cannot test transactions in this environment");
return;
}
Repository.Settings.StorageTransactionSettings = StorageTransactionSettings.RequireTransactions | StorageTransactionSettings.DisallowJoiningAmbientManaged;
Assume.That(AmbientTransaction == null);
IFileSystemTransaction transaction;
using (var scope = StorageTransactionScope.Create(Repository))
{
var underlyingTRansaction = scope.UnderlyingTransaction;
Assert.IsNotNull(underlyingTRansaction);
Assert.AreSame(AmbientTransaction, underlyingTRansaction, "Underlying transaction must be installed into the context");
transaction = scope.DetachTransaction();
Assert.AreSame(AmbientTransaction, transaction, "Detaching transaction must not change context");
}
Assert.IsNull(AmbientTransaction, "Detached scope must still restore context when disposed");
Assert.IsTrue(transaction.IsActive, "Detached context must not end transaction when disposed");
transaction.Dispose();
}
/// <summary>
/// Get transaction scope reusing pending transaction if already pending.
/// </summary>
/// <param name="lazy">
/// Whether the scope needs to be lazy or eager.
/// </param>
/// <returns>
/// New scope.
/// </returns>
/// <remarks>
/// Eager scope is for complete units of work such as <see cref="IRepositoryWriter.Flush()"/>.
/// Lazy scope is for the methods which need to take part in external [long] transactions but do not represent units of
/// work themselves, such as <see cref="IRepositoryWriter.Write(IDataItem)"/>
/// Pending transaction is registered and subscribed to only first time when returned scope is not owning the transaction
/// </remarks>
private StorageTransactionScope GetTransactionScope(bool lazy)
{
CheckNotDisposed();
StorageTransactionScope scope;
if (lazy)
{
scope = StorageTransactionScope.CreateLazy(Repository, PendingTransaction);
}
else
{
scope = StorageTransactionScope.Create(Repository, PendingTransaction);
}
if (!scope.IsNullScope && !scope.IsTransactionOwner && PendingTransaction == null)
{
PendingTransaction = scope.UnderlyingTransaction;
if (_subscriber != null)
{
PendingTransaction.Subscribe(_subscriber);
}
PendingTransaction.Subscribe((ITransactionNotification)this);
Check.Ensure(!scope.ToBeDisposed, "Pending transaction must not be disposed - we need to keep the single instance of slave pending transaction");
}
return(scope);
}
public void TestAmbientKtmTransaction()
{
if (!bfs.Repository.Util.SystemInfo.IsAnyWindows || !EnvironmentSupportsTransactions)
{
Assert.Inconclusive("Cannot test in this environment");
return;
}
using (var scope = CreateStandaloneKtmTransactionScope(true))
{
// thus allowing to use ambient storage transaction
Repository.Settings.StorageTransactionSettings = StorageTransactionSettings.DisallowJoiningAmbientManaged;
KtmTransaction ambientTransaction = (KtmTransaction)AmbientTransaction;
// eager scope
using (StorageTransactionScope target = StorageTransactionScope.Create(Repository))
{
Assert.IsFalse(target.IsNullScope, "Eager scope must not produce null scope");
Assert.IsFalse(target.IsTransactionOwner, "There's external transaction to be used");
Assert.IsFalse(target.HasChangedContext);
Assert.IsFalse(target.NoTransaction);
Assert.IsFalse(target.ToBeDisposed);
Assert.AreSame(ambientTransaction, AmbientTransaction);
Assert.AreSame(ambientTransaction, target.UnderlyingTransaction);
Assert.AreSame(ambientTransaction, target.PreviousTransaction);
}
Assert.IsNotNull(AmbientTransaction);
Assert.AreSame(ambientTransaction, AmbientTransaction);
// lazy scope
using (StorageTransactionScope target = StorageTransactionScope.CreateLazy(Repository, null))
{
Assert.IsFalse(target.IsNullScope, "Because the \"always start new\" option is OFF");
Assert.IsFalse(target.IsTransactionOwner, "Lazy scope must never be transaction owner");
Assert.IsFalse(target.HasChangedContext, "Lazy scope can only change context to NULL and only when ambient transaction is present but its usage prohibited");
Assert.IsFalse(target.NoTransaction, "Lazy scope can result in no ambient transaction when ambient transaction is present but its usage prohibited or there's "
+ "no ambient transaction at all");
Assert.IsFalse(target.ToBeDisposed, "Lazy scope must not own or dispose underlying transaction");
Assert.AreSame(ambientTransaction, AmbientTransaction);
Assert.AreSame(ambientTransaction, target.UnderlyingTransaction);
Assert.AreSame(ambientTransaction, target.PreviousTransaction);
}
Assert.IsNotNull(AmbientTransaction);
Assert.AreSame(ambientTransaction, AmbientTransaction);
}
Assert.IsNull(AmbientTransaction);
}
public void TestLoopingAndNesting()
{
if (!EnvironmentSupportsTransactions)
{
Assert.Inconclusive("Cannot test in this environment");
return;
}
Assume.That(AmbientTransaction == null, "Leftovers are not expected here");
// thus allowing to use ambient storage transaction
Repository.Settings.StorageTransactionSettings = StorageTransactionSettings.DisallowJoiningAmbientManaged;
using (var standaloneTransaction = GetStandaloneTransaction())
{
for (int n = 0; n < 100; ++n)
{
using (var scope = StorageTransactionScope.CreateLazy(Repository, standaloneTransaction))
{
Assert.AreSame(standaloneTransaction, scope.UnderlyingTransaction);
Assert.IsFalse(scope.ToBeDisposed);
Assert.AreSame(standaloneTransaction, AmbientTransaction);
using (var nestedScope = StorageTransactionScope.Create(Repository, standaloneTransaction))
{
Assert.IsFalse(nestedScope.HasChangedContext);
Assert.AreSame(standaloneTransaction, scope.UnderlyingTransaction);
Assert.IsFalse(scope.ToBeDisposed);
Assert.AreSame(standaloneTransaction, AmbientTransaction);
using (var anotherTransaction = GetStandaloneTransaction())
{
Assert.AreSame(standaloneTransaction, AmbientTransaction);
Assert.Throws(
Is.InstanceOf <InvalidOperationException>()
, () => StorageTransactionScope.Create(Repository, anotherTransaction));
}
nestedScope.Complete();
}
}
Assert.IsNull(AmbientTransaction);
Assert.IsTrue(standaloneTransaction.IsActive);
}
}
}
public void TestEagerWithAmbientKtmTransactionProhibited()
{
if (!bfs.Repository.Util.SystemInfo.IsAnyWindows || !EnvironmentSupportsTransactions)
{
Assert.Inconclusive("Cannot test in this environment");
return;
}
Assume.That(AmbientTransaction == null, "Leftovers are not expected here");
// thus not allowing to use ambient storage transaction
Repository.Settings.StorageTransactionSettings = StorageTransactionSettings.DisallowJoiningAmbientManaged | StorageTransactionSettings.AlwaysStartNew;
using (var scope_ = CreateStandaloneKtmTransactionScope(true))
{
KtmTransaction ambientTransaction = (KtmTransaction)AmbientTransaction;
// eager scope
using (StorageTransactionScope target = StorageTransactionScope.Create(Repository))
{
Assert.IsFalse(target.IsNullScope, "Eager scope must not produce null scope");
Assert.IsTrue(target.IsTransactionOwner, "The use of external transaction is prohibited by Repository.Settings.StorageTransactionSettings");
Assert.IsTrue(target.HasChangedContext);
Assert.IsFalse(target.NoTransaction);
Assert.IsTrue(target.ToBeDisposed);
Assert.AreNotSame(ambientTransaction, AmbientTransaction);
Assert.AreNotSame(ambientTransaction, target.UnderlyingTransaction);
Assert.AreSame(ambientTransaction, target.PreviousTransaction);
}
Assert.IsNotNull(AmbientTransaction);
Assert.AreSame(ambientTransaction, AmbientTransaction);
}
Assert.IsNull(AmbientTransaction);
}
public void TestAmbientManagedFirstEntry()
{
if (!EnvironmentSupportsTransactions)
{
Assert.Inconclusive("Cannot test transactions in this environment");
return;
}
Repository.Settings.StorageTransactionSettings = StorageTransactionSettings.RequireTransactions;
TransactionSubscriber subscriber = new TransactionSubscriber();
IFileSystemTransaction transaction;
using (TransactionScope masterScope = new TransactionScope())
{
using (var scope = StorageTransactionScope.Create(Repository))
{
Assert.AreEqual(1, StorageTransactionScope.ScopeNestLevel);
Assert.IsTrue(scope.HasChangedContext, "Scope must have changed context");
Assert.IsFalse(scope.IsTransactionOwner, "Transaction must be slave under managed");
Assert.IsFalse(scope.ToBeDisposed, "Scope having created slave transaction must not be disposing");
Assert.IsNotNull(AmbientTransaction, "Context not set");
Assert.AreSame(AmbientTransaction, scope.UnderlyingTransaction, "Underlying transaction is not in sync with context");
Assert.IsTrue(scope.UnderlyingTransaction.IsActive, "Transaction must be active in this scope");
Assert.IsFalse(scope.UnderlyingTransaction.Unsubscribe(subscriber), "Unsubscribing not yet subscribed returned true");
scope.UnderlyingTransaction.Subscribe(subscriber);
transaction = scope.UnderlyingTransaction;
Assert.Throws(
Is.InstanceOf <InvalidOperationException>()
, () => transaction.Commit(), "Committing slave transaction must throw InvalidOperationException");
Assert.IsFalse(scope.ToBeDisposed, "Scope turned disposing after transaction detached");
Assert.IsFalse(scope.IsTransactionOwner);
}
Assert.AreEqual(0, StorageTransactionScope.ScopeNestLevel);
Assert.IsTrue(transaction.IsActive, "Detached transaction must remain active after disposing scope");
Assert.AreEqual(0, subscriber.TimesNotified, "Disposing detached scope must not result in notification");
Assert.IsNull(KtmTransaction.Current, "The scope was disposed and must have restored context");
using (var scope = StorageTransactionScope.Create(Repository, transaction))
{
Assert.AreEqual(1, StorageTransactionScope.ScopeNestLevel);
Assert.AreSame(transaction, scope.UnderlyingTransaction, "Underlying transaction is not what was explicitly assigned");
Assert.IsTrue(scope.HasChangedContext, "Scope must have changed context");
Assert.IsFalse(scope.IsTransactionOwner, "Transaction must be slave under managed");
Assert.IsFalse(scope.ToBeDisposed, "Scope must not be disposing as explicitly specified when creating");
Assert.IsNotNull(AmbientTransaction, "Context not set");
Assert.AreSame(AmbientTransaction, scope.UnderlyingTransaction, "Underlying transaction is not in sync with context");
Assert.IsTrue(scope.UnderlyingTransaction.IsActive, "Transaction must be active in this scope");
scope.UnderlyingTransaction.Subscribe(subscriber);
}
int level = StorageTransactionScope.ScopeNestLevel;
Assert.AreEqual(0, StorageTransactionScope.ScopeNestLevel);
Assert.IsTrue(transaction.IsActive, "Detached transaction must remain active after disposing scope");
Assert.AreEqual(0, subscriber.TimesNotified, "Scope was not to dispose or commit transaction");
Assert.IsNull(AmbientTransaction, "The scope was disposed and must have restored context");
masterScope.Complete();
Assume.That(transaction.IsActive && subscriber.TimesNotified == 0);
}
System.Threading.Thread.Sleep(50);
Assert.IsFalse(transaction.IsActive, "Master transaction was committed, KTM must be committed too");
Assert.AreEqual(1, subscriber.TimesNotified, "Master transaction was committed, must have recieved 1 notification");
Assert.IsTrue(subscriber.Committed, "Transaction must have beed reported committed.");
Assert.Throws(
Is.InstanceOf <InvalidOperationException>()
, () => transaction.Subscribe(subscriber), "Subscribing to inactive transaction must throw exception");
}