/// <summary>
/// Handles multicast push updates request from a multicast view model.
/// </summary>
private void VMInstance_RequestMulticastPushUpdates(object sender, MulticastPushUpdatesEventArgs e)
{
var vmInfo = _activeVMs.FirstOrDefault(kvp => kvp.Value.Instance == sender).Value;
if (vmInfo == null)
{
return;
}
if (e.PushData)
{
var vmInstance = vmInfo.Instance;
lock (vmInstance)
{
var changedProperties = vmInstance.AcceptChangedProperties();
if (changedProperties != null && changedProperties.Count > 0)
{
Send(vmInfo, new GroupSend
{
GroupName = vmInfo.GroupName,
ConnectionIds = e.ConnectionIds,
ExcludedConnectionIds = new List <string> {
e.ExcludedConnectionId
},
Data = vmInstance.Serialize(changedProperties)
});
}
e.PushData = false;
}
}
else if (e.ExcludedConnectionId != vmInfo.ConnectionId)
{
e.ConnectionIds.Add(vmInfo.ConnectionId);
}
}
/// <summary>
/// Pushes changed properties to all associated clients, excluding the given connection.
/// </summary>
/// <param name="excludedConnectionId">Connection to exclude.</param>
internal void PushUpdatesExcept(string excludedConnectionId)
{
var delegates = RequestMulticastPushUpdates?.GetInvocationList().ToList();
if (delegates != null && delegates.Count > 0)
{
var eventArgs = new MulticastPushUpdatesEventArgs {
ExcludedConnectionId = excludedConnectionId
};
// First invocation cycle is to get the participating connection Ids from the VMControllers when a group name isn't used.
if (string.IsNullOrEmpty(GroupName))
{
RequestMulticastPushUpdates?.Invoke(this, eventArgs);
}
// Invoke the first available event handler to do the actual data push.
// If successful, the handler will set the PushData back to false.
eventArgs.PushData = true;
foreach (var d in delegates)
{
d.DynamicInvoke(this, eventArgs);
if (!eventArgs.PushData)
{
break;
}
}
}
}
/// <summary>
/// Handles multicast push updates request from a multicast view model.
/// </summary>
private void VMInstance_RequestMulticastPushUpdates(object sender, MulticastPushUpdatesEventArgs e)
{
var vmInfo = _activeVMs.FirstOrDefault(kvp => kvp.Value.Instance == sender).Value;
if (vmInfo == null)
{
return;
}
if (e.PushData)
{
var vmInstance = vmInfo.Instance;
lock (vmInstance)
{
var changedProperties = vmInstance.AcceptChangedProperties();
if (changedProperties != null && changedProperties.Count > 0)
{
var vmData = vmInstance.Serialize(changedProperties);
ResponseVMFilter.Invoke(vmInfo.Id, vmInstance, vmData, filteredData =>
{
if (!string.IsNullOrEmpty(e.GroupName))
{
var message = new GroupSend
{
GroupName = e.GroupName,
ConnectionIds = e.ConnectionIds,
ExcludedConnectionId = e.ExcludedConnectionId,
Data = (string)filteredData
};
_vmResponse(MULTICAST + nameof(GroupSend), vmInfo.Id, JsonConvert.SerializeObject(message));
}
else
{
foreach (var connectionId in e.ConnectionIds)
{
_vmResponse(connectionId, vmInfo.Id, (string)filteredData);
}
}
});
}
e.PushData = false;
}
}
else if (e.ExcludedConnectionId != vmInfo.ConnectionId)
{
e.ConnectionIds.Add(vmInfo.ConnectionId);
}
}