bool UpdateProperty(BufferedReceiveMessageProperty property, ReceiveContext receiveContext, int channelKey, string bookmarkName, BufferedReceiveState state)
{
// If there's data already there make sure the state is allowed
if (property.UserState == null)
{
property.UserState = new PropertyData()
{
ReceiveContext = receiveContext,
ChannelKey = channelKey,
BookmarkName = bookmarkName,
State = state
};
}
else
{
PropertyData data = (PropertyData)property.UserState;
// We should not buffer twice at the same state
if (data.State == state)
{
return(false);
}
data.State = state;
}
return(true);
}
public bool BufferReceive(OperationContext operationContext, ReceiveContext receiveContext, string bookmarkName, BufferedReceiveState state, bool retry)
{
bool flag = false;
BufferedReceiveMessageProperty property = null;
if (BufferedReceiveMessageProperty.TryGet(operationContext.IncomingMessageProperties, out property))
{
CorrelationMessageProperty property = null;
if (!CorrelationMessageProperty.TryGet(operationContext.IncomingMessageProperties, out property))
{
return(flag);
}
EventHandler handler = null;
InstanceKey instanceKey = property.CorrelationKey;
int channelKey = operationContext.Channel.GetHashCode();
if (!this.throttle.Acquire(channelKey))
{
return(flag);
}
try
{
if (!this.UpdateProperty(property, receiveContext, channelKey, bookmarkName, state))
{
return(flag);
}
if (handler == null)
{
handler = delegate(object sender, EventArgs e) {
lock (this.thisLock)
{
if (this.bufferedProperties.ContainsKey(instanceKey) && this.bufferedProperties[instanceKey].Remove(property))
{
try
{
property.RequestContext.DelayClose(false);
property.RequestContext.Abort();
}
catch (Exception exception)
{
if (Fx.IsFatal(exception))
{
throw;
}
}
this.throttle.Release(channelKey);
}
}
};
}
receiveContext.Faulted += handler;
lock (this.thisLock)
{
if (receiveContext.State != ReceiveContextState.Received)
{
return(flag);
}
bool flag2 = false;
if (retry)
{
property.RequestContext.DelayClose(true);
property.RegisterForReplay(operationContext);
property.ReplayRequest();
property.Notification.NotifyInvokeReceived(property.RequestContext.InnerRequestContext);
flag2 = true;
}
else
{
ReadOnlyCollection <BookmarkInfo> bookmarksForInstance = this.host.DurableInstanceManager.PersistenceProviderDirectory.GetBookmarksForInstance(instanceKey);
if (bookmarksForInstance != null)
{
for (int i = 0; i < bookmarksForInstance.Count; i++)
{
BookmarkInfo info = bookmarksForInstance[i];
if (info.BookmarkName == bookmarkName)
{
property.RequestContext.DelayClose(true);
property.RegisterForReplay(operationContext);
property.ReplayRequest();
property.Notification.NotifyInvokeReceived(property.RequestContext.InnerRequestContext);
flag2 = true;
break;
}
}
}
}
if (!flag2)
{
List <BufferedReceiveMessageProperty> list;
if (!this.bufferedProperties.TryGetValue(instanceKey, out list))
{
list = new List <BufferedReceiveMessageProperty>();
this.bufferedProperties.Add(instanceKey, list);
}
property.RequestContext.DelayClose(true);
property.RegisterForReplay(operationContext);
list.Add(property);
}
else
{
this.throttle.Release(channelKey);
}
return(true);
}
}
finally
{
if (!flag)
{
this.throttle.Release(channelKey);
}
}
}
return(flag);
}
public bool BufferReceive(OperationContext operationContext, ReceiveContext receiveContext, string bookmarkName, BufferedReceiveState state, bool retry)
{
Fx.Assert(receiveContext != null, "ReceiveContext must be present in order to perform buffering");
bool success = false;
BufferedReceiveMessageProperty property = null;
if (BufferedReceiveMessageProperty.TryGet(operationContext.IncomingMessageProperties, out property))
{
CorrelationMessageProperty correlation = null;
if (CorrelationMessageProperty.TryGet(operationContext.IncomingMessageProperties, out correlation))
{
InstanceKey instanceKey = correlation.CorrelationKey;
int channelKey = operationContext.Channel.GetHashCode();
if (this.throttle.Acquire(channelKey))
{
try
{
// Tag the property with identifying data to be used during later processing
if (UpdateProperty(property, receiveContext, channelKey, bookmarkName, state))
{
// Cleanup if we are notified the ReceiveContext faulted underneath us
receiveContext.Faulted += delegate(object sender, EventArgs e)
{
lock (this.thisLock)
{
if (this.bufferedProperties.ContainsKey(instanceKey))
{
if (this.bufferedProperties[instanceKey].Remove(property))
{
try
{
property.RequestContext.DelayClose(false);
property.RequestContext.Abort();
}
catch (Exception exception)
{
if (Fx.IsFatal(exception))
{
throw;
}
// ---- these exceptions as we are already on the error path
}
this.throttle.Release(channelKey);
}
}
}
};
// Actual Buffering
lock (this.thisLock)
{
// Optimistic state check in case we just raced with the receiveContext
// faulting. If the receiveContext still faults after the state check, the above
// cleanup routine will handle things correctly. In both cases, a double-release
// of the throttle is protected.
if (receiveContext.State == ReceiveContextState.Received)
{
bool found = false;
// if the exception indicates retry-able (such as RetryException),
// we will simply retry. This happens when racing with abort and
// WF informing the client to retry (BufferedReceiveManager is a
// client in this case).
if (retry)
{
property.RequestContext.DelayClose(true);
property.RegisterForReplay(operationContext);
property.ReplayRequest();
property.Notification.NotifyInvokeReceived(property.RequestContext.InnerRequestContext);
found = true;
}
else
{
ReadOnlyCollection <BookmarkInfo> bookmarks = this.host.DurableInstanceManager.PersistenceProviderDirectory.GetBookmarksForInstance(instanceKey);
// Retry in case match the existing bookmark
if (bookmarks != null)
{
for (int i = 0; i < bookmarks.Count; ++i)
{
BookmarkInfo bookmark = bookmarks[i];
if (bookmark.BookmarkName == bookmarkName)
{
// Found it so retry...
property.RequestContext.DelayClose(true);
property.RegisterForReplay(operationContext);
property.ReplayRequest();
property.Notification.NotifyInvokeReceived(property.RequestContext.InnerRequestContext);
found = true;
break;
}
}
}
}
if (!found)
{
List <BufferedReceiveMessageProperty> properties;
if (!this.bufferedProperties.TryGetValue(instanceKey, out properties))
{
properties = new List <BufferedReceiveMessageProperty>();
this.bufferedProperties.Add(instanceKey, properties);
}
property.RequestContext.DelayClose(true);
property.RegisterForReplay(operationContext);
properties.Add(property);
}
else
{
this.throttle.Release(channelKey);
}
success = true;
}
}
}
}
finally
{
if (!success)
{
this.throttle.Release(channelKey);
}
}
}
}
}
return(success);
}
private bool UpdateProperty(BufferedReceiveMessageProperty property, ReceiveContext receiveContext, int channelKey, string bookmarkName, BufferedReceiveState state)
{
if (property.UserState == null)
{
PropertyData data = new PropertyData {
ReceiveContext = receiveContext,
ChannelKey = channelKey,
BookmarkName = bookmarkName,
State = state
};
property.UserState = data;
}
else
{
PropertyData userState = (PropertyData)property.UserState;
if (userState.State == state)
{
return(false);
}
userState.State = state;
}
return(true);
}