public void SetAndGetValueUsingTwoTransactions()
{
Machine machine = new Machine();
TransactionalReference reference = new TransactionalReference();
reference.SetValue("foo");
Assert.AreEqual("foo", reference.GetValue());
Transaction transaction1 = new Transaction(machine);
Transaction transaction2 = new Transaction(machine);
reference.SetValue("bar", transaction1);
Assert.AreEqual("foo", reference.GetValue(transaction2));
Assert.AreEqual("bar", reference.GetValue(transaction1));
transaction1.Complete();
transaction1.Dispose();
Assert.IsTrue(reference.HasSnapshots);
Assert.AreEqual("bar", reference.GetValue());
Assert.AreEqual("foo", reference.GetValue(transaction2));
transaction2.Dispose();
Assert.IsFalse(reference.HasSnapshots);
}
public void SetAndGetValueFromReferenceInNotCommitedTransaction()
{
Machine machine = new Machine();
TransactionalReference reference = new TransactionalReference();
reference.SetValue("foo");
Assert.AreEqual("foo", reference.GetValue());
Transaction transaction = new Transaction(machine);
Machine.CurrentTransaction = transaction;
reference.SetValue("bar");
Assert.AreEqual("bar", reference.GetValue());
transaction.Dispose();
Machine.CurrentTransaction = null;
Assert.AreEqual("foo", reference.GetValue());
Assert.IsFalse(reference.HasSnapshots);
}
public void RaiseIfSetValueFromTwoTransactions()
{
Machine machine = new Machine();
TransactionalReference reference = new TransactionalReference();
reference.SetValue("foo");
Assert.AreEqual("foo", reference.GetValue());
Transaction transaction1 = new Transaction(machine);
Transaction transaction2 = new Transaction(machine);
reference.SetValue("bar", transaction1);
reference.SetValue("newbar", transaction2);
transaction1.Complete();
transaction2.Complete();
}
public void Execute(IBindingEnvironment environment)
{
if (Machine.CurrentTransaction != null)
{
this.command.Execute(environment);
return;
}
using (Transaction trans = new Transaction(Machine.Current))
{
Machine.CurrentTransaction = trans;
this.command.Execute(environment);
Machine.CurrentTransaction = null;
trans.Complete();
}
}
public void Complete(Transaction transaction, long timestamp)
{
lock (this)
{
if (this.pending != transaction)
return;
if (this.snapshots.Count == 0)
transaction.Machine.RegisterSnapshot(this);
this.snapshots[this.timestamp] = this.value;
this.value = this.pendingvalue;
this.timestamp = timestamp;
this.pending = null;
this.pendingvalue = null;
}
}
public void Dispose(Transaction transaction)
{
lock (this)
{
if (this.pending == transaction)
{
this.pending = null;
this.pendingvalue = null;
}
}
}
public void SetValue(object value, Transaction transaction)
{
lock (this)
{
if (this.pending != null && this.pending != transaction)
throw new InvalidOperationException("Reference changed in another running Transaction");
this.pending = transaction;
this.pendingvalue = value;
transaction.RegisterTransactionalReference(this);
}
}
public object GetValue(Transaction transaction)
{
lock (this)
{
if (transaction == this.pending)
return this.pendingvalue;
// TODO review snapshots
if (this.snapshots.Count == 0)
return this.value;
long? selected = null;
foreach (long ts in this.snapshots.Keys)
if (!Transaction.IsPrevious(transaction.Id, ts))
if (!selected.HasValue || Transaction.IsPrevious(selected.Value, ts))
selected = ts;
if (selected.HasValue)
return this.snapshots[selected.Value];
return this.value;
}
}
internal void UnregisterTransaction(Transaction transaction)
{
Transaction oldest = null;
lock (this.transactions)
{
this.transactions.Remove(transaction);
foreach (Transaction t in this.transactions)
if (oldest == null || Transaction.IsPrevious(t.Id, oldest.Id))
oldest = t;
lock (this.snapshots)
{
IList<ITransactionalReference> toremove = new List<ITransactionalReference>();
foreach (ITransactionalReference snapshot in this.snapshots)
{
if (oldest == null)
snapshot.ClearSnapshots();
else
snapshot.ClearSnapshots(oldest.Id);
if (!snapshot.HasSnapshots)
toremove.Add(snapshot);
}
foreach (ITransactionalReference reference in toremove)
this.snapshots.Remove(reference);
if (this.snapshots.Count == 0)
this.snapshots.Clear();
}
}
}
internal void RegisterTransaction(Transaction transaction)
{
lock (this.transactions)
{
this.transactions.Add(transaction);
}
}