/// <summary>
/// Publishes the <paramref name="message"/> on the <see cref="MessageHub"/>.
/// </summary>
/// <param name="message">The message to published</param>
public void Publish <T>(T message)
{
var localSubscriptions = Subscriptions.GetTheLatestRevisionOfSubscriptions();
var msgType = typeof(T);
#if NET_STANDARD
var msgTypeInfo = msgType.GetTypeInfo();
#endif
_globalHandler?.Invoke(msgType, message);
// ReSharper disable once ForCanBeConvertedToForeach | Performance Critical
for (var idx = 0; idx < localSubscriptions.Length; idx++)
{
var subscription = localSubscriptions[idx];
#if NET_STANDARD
if (!subscription.Type.GetTypeInfo().IsAssignableFrom(msgTypeInfo))
{
continue;
}
#else
if (!subscription.Type.IsAssignableFrom(msgType))
{
continue;
}
#endif
try
{
subscription.Handle(message);
}
catch (Exception e)
{
var copy = OnError;
copy?.Invoke(this, new MessageHubErrorEventArgs(e, subscription.Token));
}
}
}
/// <summary>
/// Publishes the <paramref name="message"/> on the <see cref="MessageHub"/>.
/// </summary>
/// <param name="message">The message to published</param>
public async Task PublishAsync <T>(T message)
{
var localSubscriptions = Subscriptions.GetTheLatestSubscriptions();
var msgType = typeof(T);
#if NET_STANDARD
var msgTypeInfo = msgType.GetTypeInfo();
#endif
_globalHandler?.Invoke(msgType, message);
// ReSharper disable once ForCanBeConvertedToForeach | Performance Critical
for (var idx = 0; idx < localSubscriptions.Length; idx++)
{
var subscription = localSubscriptions[idx];
#if NET_STANDARD
if (!subscription.Type.GetTypeInfo().IsAssignableFrom(msgTypeInfo))
{
continue;
}
#else
if (!subscription.Type.IsAssignableFrom(msgType))
{
continue;
}
#endif
try
{
await subscription.HandleAsync(message);
}
catch (Exception e)
{
_globalErrorHandler?.Invoke(subscription.Token, e);
}
}
}
/// <summary> /// Clears all the subscriptions from the <see cref="MessageHub"/>. /// <remarks>The global handler and the global error handler are not affected</remarks> /// </summary> public void ClearSubscriptions() => Subscriptions.Clear();
/// <summary> /// Checks if a specific subscription is active on the <see cref="MessageHub"/>. /// </summary> /// <param name="token">The token representing the subscription</param> /// <returns><c>True</c> if the subscription is active otherwise <c>False</c></returns> public Boolean IsSubscribed(Guid token) => Subscriptions.IsRegistered(token);
/// <summary> /// Unsubscribes a subscription from the <see cref="MessageHub"/>. /// </summary> /// <param name="token">The token representing the subscription</param> public void Unsubscribe(Guid token) => Subscriptions.UnRegister(token);
/// <summary>
/// Subscribes a callback against the <see cref="MessageHub"/> for a specific type of message.
/// </summary>
/// <typeparam name="T">The type of message to subscribe to</typeparam>
/// <param name="action">The callback to be invoked once the message is published on the <see cref="MessageHub"/></param>
/// <param name="throttleBy">The <see cref="TimeSpan"/> specifying the rate at which subscription is throttled</param>
/// <returns>The token representing the subscription</returns>
public Guid Subscribe <T>(Func <T, Task> action, TimeSpan throttleBy)
{
EnsureNotNull(action);
return(Subscriptions.Register(throttleBy, action));
}
/// <summary>
/// Disposes the <see cref="MessageHub"/>.
/// </summary>
public void Dispose()
{
Interlocked.Increment(ref _disposed);
Subscriptions.Dispose();
}
/// <summary>
/// Clears all the subscriptions from the <see cref="MessageHub"/>.
/// <remarks>The global handler and the <see cref="OnError"/> are not affected</remarks>
/// </summary>
public void ClearSubscriptions()
{
EnsureNotDisposed();
Subscriptions.Clear();
}
/// <summary>
/// Checks if a specific subscription is active on the <see cref="MessageHub"/>.
/// </summary>
/// <param name="token">The token representing the subscription</param>
/// <returns><c>True</c> if the subscription is active otherwise <c>False</c></returns>
public bool IsSubscribed(Guid token)
{
EnsureNotDisposed();
return(Subscriptions.IsRegistered(token));
}
/// <summary>
/// Un-Subscribes a subscription from the <see cref="MessageHub"/>.
/// </summary>
/// <param name="token">The token representing the subscription</param>
public void UnSubscribe(Guid token)
{
EnsureNotDisposed();
Subscriptions.UnRegister(token);
}
/// <summary>
/// Checks if a specific subscription is active on the <see cref="MessageHub"/>.
/// </summary>
/// <param name="token">The token representing the subscription</param>
/// <returns><c>True</c> if the subscription is active otherwise <c>False</c></returns>
public bool IsSubscribed(Guid token)
{
return(Subscriptions.IsRegistered(token));
}
/// <summary>
/// Subscribes a callback against the <see cref="MessageHub"/> for a specific type of message.
/// </summary>
/// <typeparam name="T">The type of message to subscribe to</typeparam>
/// <param name="action">The callback to be invoked once the message is published on the <see cref="MessageHub"/></param>
/// <param name="throttleBy">The <see cref="TimeSpan"/> specifying the rate at which subscription is throttled</param>
/// <returns>The token representing the subscription</returns>
public Guid Subscribe <T>(Action <T> action, TimeSpan throttleBy)
{
EnsureNotNull(action);
return(Subscriptions.Register(throttleBy, action, null));
}
