/// <summary>
/// This handler is sending events to clients!
/// </summary>
/// <param name="sender">object that is sending event</param>
/// <param name="e">data about event</param>
public static void JSEventHandler(object sender, ObjectChangedEventArgs e)
{
var context = GlobalHost.ConnectionManager.GetHubContext<Event>();
//finding user to which I need to send event
string connectionId = MemberManager.FindConnection(e.Subscription.SubscriptionId.ToString());
//sending event to specific user
context.Clients[connectionId].sendEvent(e.ToJSON());
}
/// <summary>
/// Invokes events for object change subscriptions
/// </summary>
/// <param name="workspaceId">Workspace Id which is making the changes</param>
/// <param name="commitResult">Commit result to process</param>
public void InvokeEvents(Guid workspaceId, CommitResult<Guid> commitResult)
{
lock (subscriptions)
{
Collection<Guid> removalList = new Collection<Guid>();
foreach (var item in subscriptions.Values)
{
// Was the object changed in the commit?
if (commitResult.Mapping.ContainsKey(item.InstanceId))
{
// Is the change originating from different workspace OR we wanted events from same workspace
bool doThrowEvent = !item.WorkspaceId.Equals(workspaceId) || item.NotifyChangesFromSameWorkspace;
// If property was specified
if (doThrowEvent && !item.MemberId.Equals(Guid.Empty))
{
var isScalarMember = typesService.IsScalarType(typesService.GetMemberTypeId(item.MemberId));
if (isScalarMember)
{
// Get scalar property values
var oldValue = objectInstancesService.GetScalarInstanceMember(item.InstanceId, item.MemberId);
var newValue = objectInstancesService.GetScalarInstanceMember(commitResult.Mapping[item.InstanceId], item.MemberId);
// Throw event if they are not the same
doThrowEvent = Comparer.Default.Compare(oldValue, newValue) != 0;
}
else
{
bool isPermanent;
// Get reference property values
var oldValue = objectInstancesService.GetReferenceInstanceMember(item.InstanceId, item.MemberId, out isPermanent);
var newValue = objectInstancesService.GetReferenceInstanceMember(commitResult.Mapping[item.InstanceId], item.MemberId, out isPermanent);
// Throw event if they are not pointing to the same Ids
doThrowEvent = Comparer.Default.Compare(oldValue, newValue) != 0;
}
}
if (doThrowEvent)
{
var args = new ObjectChangedEventArgs(commitResult.ResultSnapshotId, item.InstanceId, commitResult.Mapping[item.InstanceId], new Subscription(item.SubscriptionId, item.WorkspaceId));
// Throw event
item.Del(this, args);
if (args.RenewSubscription)
{
// Renew subscription to new version
item.InstanceId = commitResult.Mapping[item.InstanceId];
}
else
{
// Register for removal
removalList.Add(item.SubscriptionId);
}
}
else
{
// Automatically renew subscriptions when processing own changes
item.InstanceId = commitResult.Mapping[item.InstanceId];
}
}
}
// Remove items which are not renewed
foreach (var item in removalList)
{
subscriptions.Remove(item);
}
}
}