/// <summary>
/// Scans the assembly passed looking for activity implementations derived from
/// <see cref="ActivityBase"/> and tagged by <see cref="ActivityAttribute"/> and
/// registers them with Temporal.
/// </summary>
/// <param name="assembly">The target assembly.</param>
/// <param name="disableDuplicateCheck">Disable checks for duplicate activity registrations.</param>
/// <returns>The tracking <see cref="Task"/>.</returns>
/// <exception cref="TypeLoadException">
/// Thrown for types tagged by <see cref="ActivityAttribute"/> that are not
/// derived from <see cref="ActivityBase"/>.
/// </exception>
/// <exception cref="InvalidOperationException">Thrown if one of the tagged classes conflict with an existing registration.</exception>
/// <exception cref="InvalidOperationException">
/// Thrown if the worker has already been started. You must register workflow
/// and activity implementations before starting workers.
/// </exception>
/// <exception cref="RegistrationException">Thrown when there's a problem with the registration.</exception>
/// <remarks>
/// <note>
/// Be sure to register all services you will be injecting into activities via
/// <see cref="NeonHelper.ServiceContainer"/> before you call this as well as
/// registering of your activity implementations before starting a worker.
/// </note>
/// </remarks>
public async Task RegisterAssemblyActivitiesAsync(Assembly assembly, bool disableDuplicateCheck = false)
{
await SyncContext.Clear;
Covenant.Requires <ArgumentNullException>(assembly != null, nameof(assembly));
EnsureNotDisposed();
EnsureCanRegister();
lock (registeredActivityTypes)
{
foreach (var activityType in assembly.GetTypes().Where(type => type.IsClass))
{
var activityAttribute = activityType.GetCustomAttribute <ActivityAttribute>();
if (activityAttribute != null && activityAttribute.AutoRegister)
{
var activityTypeName = TemporalHelper.GetActivityTypeName(activityType, activityAttribute);
if (registeredActivityTypes.Contains(activityType))
{
if (disableDuplicateCheck)
{
continue;
}
else
{
throw new RegistrationException($"Activity implementation [{activityType.FullName}] has already been registered.");
}
}
registeredActivityTypes.Add(activityType);
}
}
}
}