internal InstancePersistenceContext (InstanceHandle handle, InstanceView view)
{
if (handle == null)
throw new ArgumentNullException ("handle");
if (view == null)
throw new ArgumentNullException ("view");
InstanceHandle = handle;
InstanceView = view;
}
internal InstancePersistenceEvent AddHandleToEvent(InstanceHandle handle, InstancePersistenceEvent persistenceEvent, InstanceOwner owner)
{
lock (this.ThisLock)
{
InstanceNormalEvent ownerEventHelper = this.GetOwnerEventHelper(persistenceEvent, owner);
ownerEventHelper.BoundHandles.Add(handle);
ownerEventHelper.PendingHandles.Remove(handle);
return (ownerEventHelper.IsSignaled ? ownerEventHelper : null);
}
}
public IAsyncResult BeginWaitForEvents(InstanceHandle handle, TimeSpan timeout, AsyncCallback callback, object state)
{
if (handle == null)
{
throw Fx.Exception.ArgumentNull("handle");
}
if (!object.ReferenceEquals(this, handle.Store))
{
throw Fx.Exception.Argument("handle", SRCore.ContextNotFromThisStore);
}
TimeoutHelper.ThrowIfNegativeArgument(timeout);
return InstanceHandle.BeginWaitForEvents(handle, timeout, callback, state);
}
InstancePersistenceContext(InstanceHandle handle)
{
Fx.Assert(handle != null, "Null handle passed to InstancePersistenceContext.");
InstanceHandle = handle;
// Fork a copy of the current view to be the new working view. It starts with no query results.
InstanceView newView = handle.View.Clone();
newView.InstanceStoreQueryResults = null;
InstanceView = newView;
this.cancellationHandlerCalled = 0;
}
// This can be called to remove a handle from the BoundHandles table. It should be called only after no more commands are in progress or could be made on the handle.
internal void Unbind(InstanceHandle handle)
{
Fx.Assert(object.ReferenceEquals(this, handle.Owner), "Unbind called on the wrong owner for a handle.");
Fx.Assert(handle.Id != Guid.Empty, "Unbind called on a handle not even bound to an instance.");
lock (HandlesLock)
{
// The handle may have already been bumped - only remove it if it's still it.
InstanceHandle existingHandle;
if (BoundHandles.TryGetValue(handle.Id, out existingHandle) && object.ReferenceEquals(handle, existingHandle))
{
BoundHandles.Remove(handle.Id);
}
}
}
internal InstancePersistenceContext(InstanceHandle handle, Transaction transaction)
: this(handle)
{
Fx.Assert(transaction != null, "Null Transaction passed to InstancePersistenceContext.");
// Let's take our own clone of the transaction. We need to do this because we might need to
// create a TransactionScope using the transaction and in cases where we are dealing with a
// transaction that is flowed into the workflow on a message, the DependentTransaction that the
// dispatcher creates and sets to Transaction.Current may already be Completed by the time a
// Save operation is done. And since TransactionScope creates a DependentTransaction, it won't
// be able to.
// We don't create another DependentClone because we are going to do a EnlistVolatile on the
// transaction ourselves.
this.transaction = transaction.Clone();
IsHostTransaction = true;
this.eventTraceActivity = handle.EventTraceActivity;
}
public IAsyncResult BeginExecute(InstanceHandle handle, InstancePersistenceCommand command, TimeSpan timeout, AsyncCallback callback, object state)
{
if (command == null)
{
throw Fx.Exception.ArgumentNull("command");
}
if (handle == null)
{
throw Fx.Exception.ArgumentNull("handle");
}
if (!object.ReferenceEquals(this, handle.Store))
{
throw Fx.Exception.Argument("handle", SRCore.ContextNotFromThisStore);
}
TimeoutHelper.ThrowIfNegativeArgument(timeout);
return InstancePersistenceContext.BeginOuterExecute(handle, command, Transaction.Current, timeout, callback, state);
}
public void MarkInstanceOwnerCreated(Guid lockOwnerId, long surrogateLockOwnerId, InstanceHandle lockOwnerInstanceHandle, bool detectRunnableInstances, bool detectActivatableInstances)
{
this.lockOwnerId = lockOwnerId;
this.SurrogateLockOwnerId = surrogateLockOwnerId;
this.lockOwnerInstanceHandle = new WeakReference(lockOwnerInstanceHandle);
TimeSpan hostLockRenewalPeriod = this.sqlWorkflowInstanceStore.HostLockRenewalPeriod;
TimeSpan runnableInstancesDetectionPeriod = this.sqlWorkflowInstanceStore.RunnableInstancesDetectionPeriod;
if (detectActivatableInstances)
{
this.InstanceDetectionTask = new DetectActivatableWorkflowsTask(this.sqlWorkflowInstanceStore, this, runnableInstancesDetectionPeriod);
}
else if (detectRunnableInstances)
{
this.InstanceDetectionTask = new DetectRunnableInstancesTask(this.sqlWorkflowInstanceStore, this, runnableInstancesDetectionPeriod);
}
this.LockRenewalTask = new System.Activities.DurableInstancing.LockRenewalTask(this.sqlWorkflowInstanceStore, this, hostLockRenewalPeriod);
this.LockRecoveryTask = new System.Activities.DurableInstancing.LockRecoveryTask(this.sqlWorkflowInstanceStore, this, hostLockRenewalPeriod);
if (this.InstanceDetectionTask != null)
{
this.InstanceDetectionTask.ResetTimer(true);
}
this.LockRenewalTask.ResetTimer(true);
this.LockRecoveryTask.ResetTimer(true);
}
bool CreateDirectory()
{
this.instanceManager.InitializePersistenceProviderDirectory();
this.instanceManager.handle = this.handle;
this.handle = null;
return true;
}
public void Open(TimeSpan timeout)
{
Fx.Assert(Host != null, "Extension should have been attached in WorkflowServiceHost constructor.");
lock (this.thisLock)
{
ThrowIfDisposedOrImmutable(this.state);
this.state = States.Opened;
}
InitializeDefinitionProvider();
CheckPersistenceProviderBehavior();
SetDefaultOwnerMetadata();
if (InstanceStore != null)
{
using (new TransactionScope(TransactionScopeOption.Suppress))
{
TimeoutHelper timeoutHelper = new TimeoutHelper(timeout);
InstanceHandle handle = null;
try
{
handle = InstanceStore.CreateInstanceHandle(null);
this.owner = InstanceStore.Execute(handle, GetCreateOwnerCommand(), timeoutHelper.RemainingTime()).InstanceOwner;
this.handle = handle;
handle = null;
}
catch (InstancePersistenceException exception)
{
throw FxTrace.Exception.AsError(new CommunicationException(SR.UnableToOpenAndRegisterStore, exception));
}
finally
{
if (handle != null)
{
handle.Free();
}
}
}
}
InitializePersistenceProviderDirectory();
}
public OpenInstanceStoreAsyncResult(DurableInstanceManager instanceManager, TimeSpan timeout, AsyncCallback callback, object state)
: base(callback, state)
{
this.instanceManager = instanceManager;
this.timeoutHelper = new TimeoutHelper(timeout);
lock (this.instanceManager.thisLock)
{
DurableInstanceManager.ThrowIfDisposedOrImmutable(this.instanceManager.state);
this.instanceManager.state = States.Opened;
}
this.instanceManager.InitializeDefinitionProvider();
instanceManager.CheckPersistenceProviderBehavior();
this.instanceManager.SetDefaultOwnerMetadata();
this.OnCompleting = OpenInstanceStoreAsyncResult.onFinally;
bool completeSelf;
Exception completionException = null;
try
{
if (instanceManager.InstanceStore == null)
{
completeSelf = CreateDirectory();
}
else
{
this.handle = this.instanceManager.InstanceStore.CreateInstanceHandle(null);
IAsyncResult executeResult = this.instanceManager.InstanceStore.BeginExecute(this.handle,
this.instanceManager.GetCreateOwnerCommand(), this.timeoutHelper.RemainingTime(),
this.PrepareAsyncCompletion(OpenInstanceStoreAsyncResult.handleEndExecute), this);
completeSelf = SyncContinue(executeResult);
}
}
catch (Exception exception)
{
if (Fx.IsFatal(exception))
{
throw;
}
completionException = exception;
completeSelf = true;
}
if (completeSelf)
{
Complete(true, completionException);
}
}
protected override object OnNewInstanceHandle(InstanceHandle instanceHandle)
{
this.MakeReadOnly();
return new InstanceLockTracking(this);
}
AcquireContextAsyncResult(InstanceHandle handle, Transaction hostTransaction, TimeSpan timeout, out bool setOperationPending, bool synchronous, AsyncCallback callback, object state)
: base(callback, state)
{
// Need to report back to the caller whether or not we set OperationPending.
setOperationPending = false;
this.handle = handle;
HostTransaction = hostTransaction;
this.timeoutHelper = new TimeoutHelper(timeout);
AcquireContextAsyncResult transactionWait;
bool reuseContext = false;
lock (this.handle.ThisLock)
{
if (!this.handle.IsValid)
{
throw Fx.Exception.AsError(new OperationCanceledException(SRCore.HandleFreed));
}
if (this.handle.OperationPending)
{
throw Fx.Exception.AsError(new InvalidOperationException(SRCore.CommandExecutionCannotOverlap));
}
setOperationPending = true;
this.handle.OperationPending = true;
transactionWait = this.handle.CurrentTransactionalAsyncResult;
if (transactionWait != null)
{
Fx.Assert(this.handle.AcquirePending == null, "Overlapped acquires pending.");
// If the transaction matches but is already completed (or completing), the easiest ting to do
// is wait for it to complete, then try to re-enlist, and have that failure be the failure mode for Execute.
// We do that by following the regular, non-matching transaction path.
if (transactionWait.HostTransaction.Equals(hostTransaction) && !this.handle.TooLateToEnlist)
{
reuseContext = true;
this.executionContext = transactionWait.ReuseContext();
this.handle.CurrentExecutionContext = this.executionContext;
}
else
{
this.handle.AcquirePending = this;
}
}
}
if (transactionWait != null)
{
Fx.Assert(transactionWait.IsCompleted, "Old AsyncResult must be completed by now.");
// Reuse the existing InstanceExecutionContext if this is the same transaction we're waiting for.
if (reuseContext)
{
Complete(true);
return;
}
TimeSpan waitTimeout = this.timeoutHelper.RemainingTime();
if (synchronous)
{
if (!transactionWait.WaitForHostTransaction.Wait(waitTimeout))
{
throw Fx.Exception.AsError(new TimeoutException(InternalSR.TimeoutOnOperation(waitTimeout)));
}
}
else
{
if (!transactionWait.WaitForHostTransaction.WaitAsync(AcquireContextAsyncResult.onHostTransaction, this, waitTimeout))
{
return;
}
}
}
if (DoAfterTransaction())
{
Complete(true);
}
}
public OpenInstanceStoreAsyncResult(DurableInstanceManager instanceManager, TimeSpan timeout, AsyncCallback callback, object state) : base(callback, state)
{
bool flag;
this.instanceManager = instanceManager;
this.timeoutHelper = new TimeoutHelper(timeout);
lock (this.instanceManager.thisLock)
{
DurableInstanceManager.ThrowIfDisposedOrImmutable(this.instanceManager.state);
this.instanceManager.state = 1;
}
instanceManager.CheckPersistenceProviderBehavior();
this.instanceManager.SetDefaultOwnerMetadata();
base.OnCompleting = onFinally;
Exception exception = null;
try
{
if (instanceManager.InstanceStore == null)
{
flag = this.CreateDirectory();
}
else
{
this.handle = this.instanceManager.InstanceStore.CreateInstanceHandle((InstanceOwner) null);
IAsyncResult result = this.instanceManager.InstanceStore.BeginExecute(this.handle, this.instanceManager.createOwnerCommand, this.timeoutHelper.RemainingTime(), base.PrepareAsyncCompletion(handleEndExecute), this);
flag = base.SyncContinue(result);
}
}
catch (Exception exception2)
{
if (Fx.IsFatal(exception2))
{
throw;
}
exception = exception2;
flag = true;
}
if (flag)
{
base.Complete(true, exception);
}
}
protected override void OnFreeInstanceHandle(InstanceHandle instanceHandle, object userContext)
{
((InstanceLockTracking) userContext).HandleFreed();
}
private static void WaitForRunnableInstance(InstanceStore store, InstanceHandle ownerHandle)
{
IEnumerable<InstancePersistenceEvent> events = store.WaitForEvents(ownerHandle, TimeSpan.MaxValue);
bool foundRunnable = false;
// Loop through the persistence events looking for the HasRunnableWorkflow event (in this sample, it corresponds with
// the workflow instance whose timer has expired and is ready to be resumed by the host).
foreach (InstancePersistenceEvent persistenceEvent in events)
{
if (persistenceEvent.Equals(HasRunnableWorkflowEvent.Value))
{
foundRunnable = true;
break;
}
}
if (!foundRunnable)
{
throw new ApplicationException("Unexpected: No runnable instances found in the instance store");
}
}
public ExecuteAsyncResult(InstanceHandle initialInstanceHandle, InstancePersistenceCommand command, Transaction transaction, TimeSpan timeout, AsyncCallback callback, object state)
: this(command, timeout, callback, state)
{
this.initialInstanceHandle = initialInstanceHandle;
OnCompleting = new Action<AsyncResult, Exception>(SimpleCleanup);
IAsyncResult result = this.initialInstanceHandle.BeginAcquireExecutionContext(transaction, this.timeoutHelper.RemainingTime(), PrepareAsyncCompletion(ExecuteAsyncResult.onAcquireContext), this);
if (result.CompletedSynchronously)
{
// After this stage, must complete explicitly in order to get Cleanup to run correctly.
bool completeSelf = false;
Exception completionException = null;
try
{
completeSelf = OnAcquireContext(result);
}
catch (Exception exception)
{
if (Fx.IsFatal(exception))
{
throw;
}
completeSelf = true;
completionException = exception;
}
if (completeSelf)
{
Complete(true, completionException);
}
}
}
public AcquireContextAsyncResult(InstanceHandle handle, Transaction hostTransaction, TimeSpan timeout, out bool setOperationPending, AsyncCallback callback, object state) : this(handle, hostTransaction, timeout, out setOperationPending, false, callback, state)
{
}
internal static IAsyncResult BeginWaitForEvents(InstanceHandle handle, TimeSpan timeout, AsyncCallback callback, object state)
{
return new WaitForEventsAsyncResult(handle, timeout, callback, state);
}
internal InstancePersistenceContext(InstanceHandle handle, TimeSpan timeout)
: this(handle)
{
this.timeout = timeout;
}
public void Open(TimeSpan timeout)
{
lock (this.thisLock)
{
ThrowIfDisposedOrImmutable(this.state);
this.state = 1;
}
this.CheckPersistenceProviderBehavior();
this.SetDefaultOwnerMetadata();
if (this.InstanceStore != null)
{
using (new TransactionScope(TransactionScopeOption.Suppress))
{
TimeoutHelper helper = new TimeoutHelper(timeout);
InstanceHandle handle = null;
try
{
handle = this.InstanceStore.CreateInstanceHandle((InstanceOwner) null);
this.owner = this.InstanceStore.Execute(handle, this.createOwnerCommand, helper.RemainingTime()).InstanceOwner;
this.handle = handle;
handle = null;
}
catch (InstancePersistenceException exception)
{
throw System.ServiceModel.Activities.FxTrace.Exception.AsError(new CommunicationException(System.ServiceModel.Activities.SR.UnableToOpenAndRegisterStore, exception));
}
finally
{
if (handle != null)
{
handle.Free();
}
}
}
}
this.InitializePersistenceProviderDirectory();
}
public ExecuteAsyncResult(InstanceHandle initialInstanceHandle, InstancePersistenceCommand command, Transaction transaction, TimeSpan timeout)
: this(command, timeout, null, null)
{
this.initialInstanceHandle = initialInstanceHandle;
this.context = this.initialInstanceHandle.AcquireExecutionContext(transaction, this.timeoutHelper.RemainingTime());
Exception completionException = null;
try
{
// After this stage, must complete explicitly in order to get Cleanup to run correctly.
this.context.RootAsyncResult = this;
this.context.LastAsyncResult = this;
OnCompleting = new Action<AsyncResult, Exception>(Cleanup);
RunLoopCore(true);
if (this.transactionToCommit != null)
{
try
{
this.transactionToCommit.Commit();
}
catch (TransactionException)
{
// Since we are enlisted in this transaction, we can ignore exceptions from Commit.
}
this.transactionToCommit = null;
}
DoWaitForTransaction(true);
}
catch (Exception exception)
{
if (Fx.IsFatal(exception))
{
throw;
}
completionException = exception;
}
Complete(true, completionException);
}
bool PostProcess()
{
//cleanup any buffered receives unassociated with workflowServiceInstances
BufferedReceiveManager bufferedReceiveManager = this.instanceManager.Host.Extensions.Find<BufferedReceiveManager>();
if (bufferedReceiveManager != null)
{
bufferedReceiveManager.AbandonBufferedReceives();
}
// Send the DeleteWorkflowOwner command to the instance store.
if (this.instanceManager.InstanceStore != null)
{
IAsyncResult executeResult = null;
this.handle = this.instanceManager.InstanceStore.CreateInstanceHandle(this.instanceManager.owner);
try
{
executeResult = this.instanceManager.InstanceStore.BeginExecute(this.handle,
new DeleteWorkflowOwnerCommand(), this.timeoutHelper.RemainingTime(),
this.PrepareAsyncCompletion(CloseAsyncResult.handleEndExecute), this);
return (SyncContinue(executeResult));
}
// Ignore some exceptions because DeleteWorkflowOwner is best effort.
catch (InstancePersistenceCommandException) { }
catch (InstanceOwnerException) { }
catch (OperationCanceledException) { }
finally
{
if (executeResult == null)
{
this.handle.Free();
this.handle = null;
}
}
return this.SyncContinue(executeResult);
}
else
{
CloseProviderDirectory();
return true;
}
}
public void MarkInstanceOwnerCreated(Guid lockOwnerId, long surrogateLockOwnerId, InstanceHandle lockOwnerInstanceHandle, bool detectRunnableInstances, bool detectActivatableInstances)
{
Fx.Assert(this.isBeingModified, "Must have modification lock to mark owner as created");
this.lockOwnerId = lockOwnerId;
this.SurrogateLockOwnerId = surrogateLockOwnerId;
this.lockOwnerInstanceHandle = new WeakReference(lockOwnerInstanceHandle);
TimeSpan runnableInstancesDetectionPeriod = this.sqlWorkflowInstanceStore.RunnableInstancesDetectionPeriod;
if (detectActivatableInstances)
{
this.InstanceDetectionTask = new DetectActivatableWorkflowsTask(this.sqlWorkflowInstanceStore, this, runnableInstancesDetectionPeriod);
}
else if (detectRunnableInstances)
{
this.InstanceDetectionTask = new DetectRunnableInstancesTask(this.sqlWorkflowInstanceStore, this, runnableInstancesDetectionPeriod);
}
// By setting taskTimeout value with BufferedHostLockRenewalPeriod,
// BufferedHostLockRenewalPeriod becomes max sql retry duration for ExtendLock command and RecoveryIntanceLock command.
this.LockRenewalTask = new LockRenewalTask(this.sqlWorkflowInstanceStore, this, this.HostLockRenewalPulseInterval, this.sqlWorkflowInstanceStore.BufferedHostLockRenewalPeriod);
this.LockRecoveryTask = new LockRecoveryTask(this.sqlWorkflowInstanceStore, this, this.HostLockRenewalPulseInterval, this.sqlWorkflowInstanceStore.BufferedHostLockRenewalPeriod);
if (this.InstanceDetectionTask != null)
{
this.InstanceDetectionTask.ResetTimer(true);
}
this.LockRenewalTask.ResetTimer(true);
this.LockRecoveryTask.ResetTimer(true);
}
public AcquireContextAsyncResult(InstanceHandle handle, Transaction hostTransaction, TimeSpan timeout, out bool setOperationPending) : this(handle, hostTransaction, timeout, out setOperationPending, true, null, null)
{
}
private bool Process()
{
while (this.workflowServiceInstances.MoveNext())
{
this.currentInstance = this.workflowServiceInstances.Current.GetInstance(null);
if (this.currentInstance != null)
{
IAsyncResult result = this.currentInstance.BeginReleaseInstance(false, this.timeoutHelper.RemainingTime(), base.PrepareAsyncCompletion(handleEndReleaseInstance), this);
if (!base.CheckSyncContinue(result))
{
return false;
}
this.currentInstance.EndReleaseInstance(result);
}
}
BufferedReceiveManager manager = this.instanceManager.Host.Extensions.Find<BufferedReceiveManager>();
if (manager != null)
{
manager.AbandonBufferedReceives();
}
if (this.instanceManager.InstanceStore == null)
{
return this.CloseProviderDirectory();
}
IAsyncResult result2 = null;
this.handle = this.instanceManager.InstanceStore.CreateInstanceHandle(this.instanceManager.owner);
try
{
result2 = this.instanceManager.InstanceStore.BeginExecute(this.handle, new DeleteWorkflowOwnerCommand(), this.timeoutHelper.RemainingTime(), base.PrepareAsyncCompletion(handleEndExecute), this);
}
catch (InstancePersistenceCommandException)
{
}
catch (InstanceOwnerException)
{
}
catch (OperationCanceledException)
{
}
finally
{
if (result2 == null)
{
this.handle.Free();
this.handle = null;
}
}
return base.SyncContinue(result2);
}
private AcquireContextAsyncResult(InstanceHandle handle, Transaction hostTransaction, TimeSpan timeout, out bool setOperationPending, bool synchronous, AsyncCallback callback, object state) : base(callback, state)
{
InstanceHandle.AcquireContextAsyncResult currentTransactionalAsyncResult;
setOperationPending = false;
this.handle = handle;
this.HostTransaction = hostTransaction;
this.timeoutHelper = new TimeoutHelper(timeout);
bool flag = false;
lock (this.handle.ThisLock)
{
if (!this.handle.IsValid)
{
throw Fx.Exception.AsError(new OperationCanceledException(SRCore.HandleFreed));
}
if (this.handle.OperationPending)
{
throw Fx.Exception.AsError(new InvalidOperationException(SRCore.CommandExecutionCannotOverlap));
}
setOperationPending = true;
this.handle.OperationPending = true;
currentTransactionalAsyncResult = this.handle.CurrentTransactionalAsyncResult;
if (currentTransactionalAsyncResult != null)
{
if (currentTransactionalAsyncResult.HostTransaction.Equals(hostTransaction) && !this.handle.TooLateToEnlist)
{
flag = true;
this.executionContext = currentTransactionalAsyncResult.ReuseContext();
this.handle.CurrentExecutionContext = this.executionContext;
}
else
{
this.handle.AcquirePending = this;
}
}
}
if (currentTransactionalAsyncResult != null)
{
if (flag)
{
base.Complete(true);
return;
}
TimeSpan span = this.timeoutHelper.RemainingTime();
if (synchronous)
{
if (!currentTransactionalAsyncResult.WaitForHostTransaction.Wait(span))
{
throw Fx.Exception.AsError(new TimeoutException(SRCore.TimeoutOnOperation(span)));
}
}
else if (!currentTransactionalAsyncResult.WaitForHostTransaction.WaitAsync(onHostTransaction, this, span))
{
return;
}
}
if (this.DoAfterTransaction())
{
base.Complete(true);
}
}
internal static InstanceView OuterExecute(InstanceHandle initialInstanceHandle, InstancePersistenceCommand command, Transaction transaction, TimeSpan timeout)
{
try
{
return ExecuteAsyncResult.End(new ExecuteAsyncResult(initialInstanceHandle, command, transaction, timeout));
}
catch (TimeoutException)
{
initialInstanceHandle.Free();
throw;
}
catch (OperationCanceledException)
{
initialInstanceHandle.Free();
throw;
}
}
internal WaitForEventsAsyncResult(InstanceHandle handle, TimeSpan timeout, AsyncCallback callback, object state) : base(callback, state)
{
this.handle = handle;
this.timeout = timeout;
if ((this.timeout != TimeSpan.Zero) && (this.timeout != TimeSpan.MaxValue))
{
this.timer = new IOThreadTimer(timeoutCallback, this, false);
}
List<InstancePersistenceEvent> list = this.handle.StartWaiting(this, this.timer, this.timeout);
if (list == null)
{
if (this.timeout == TimeSpan.Zero)
{
this.handle.CancelWaiting(this);
throw Fx.Exception.AsError(new TimeoutException(SRCore.WaitForEventsTimedOut(TimeSpan.Zero)));
}
}
else
{
this.readyEvents = list;
base.Complete(true);
}
}
internal static IAsyncResult BeginOuterExecute(InstanceHandle initialInstanceHandle, InstancePersistenceCommand command, Transaction transaction, TimeSpan timeout, AsyncCallback callback, object state)
{
try
{
return new ExecuteAsyncResult(initialInstanceHandle, command, transaction, timeout, callback, state);
}
catch (TimeoutException)
{
initialInstanceHandle.Free();
throw;
}
catch (OperationCanceledException)
{
initialInstanceHandle.Free();
throw;
}
}
