/// <inheritdoc />
public override Task SendGroupsAsync(IReadOnlyList <string> groupNames, string methodName, object?[] args, CancellationToken cancellationToken = default)
{
// Each task represents the list of tasks for each of the writes within a group
List <Task>? tasks = null;
SerializedHubMessage?message = null;
foreach (var groupName in groupNames)
{
if (string.IsNullOrEmpty(groupName))
{
throw new InvalidOperationException("Cannot send to an empty group name.");
}
var group = _groups[groupName];
if (group != null)
{
DefaultHubLifetimeManager <THub> .SendToGroupConnections(methodName, args, group, null, null, ref tasks, ref message, cancellationToken);
}
}
if (tasks != null)
{
return(Task.WhenAll(tasks));
}
return(Task.CompletedTask);
}
/// <inheritdoc />
public override Task SendGroupAsync(string groupName, string methodName, object?[] args, CancellationToken cancellationToken = default)
{
if (groupName == null)
{
throw new ArgumentNullException(nameof(groupName));
}
var group = _groups[groupName];
if (group != null)
{
// Can't optimize for sending to a single connection in a group because
// group might be modified inbetween checking and sending
List <Task>? tasks = null;
SerializedHubMessage?message = null;
DefaultHubLifetimeManager <THub> .SendToGroupConnections(methodName, args, group, null, null, ref tasks, ref message, cancellationToken);
if (tasks != null)
{
return(Task.WhenAll(tasks));
}
}
return(Task.CompletedTask);
}
/// <inheritdoc />
public override Task SendGroupExceptAsync(string groupName, string methodName, object?[] args, IReadOnlyList <string> excludedConnectionIds, CancellationToken cancellationToken = default)
{
if (groupName == null)
{
throw new ArgumentNullException(nameof(groupName));
}
var group = _groups[groupName];
if (group != null)
{
List <Task>? tasks = null;
SerializedHubMessage?message = null;
DefaultHubLifetimeManager <THub> .SendToGroupConnections(methodName, args, group, (connection, state) => !((IReadOnlyList <string>)state !).Contains(connection.ConnectionId), excludedConnectionIds, ref tasks, ref message, cancellationToken);
if (tasks != null)
{
return(Task.WhenAll(tasks));
}
}
return(Task.CompletedTask);
}
