/// <summary> Initialize and start the service. </summary>
/// <remarks>
/// This will start a background task that performs all processing
/// and regularly updates the contents.
/// </remarks>
/// <param name="storage"> Identifies where the event stream data is stored. </param>
/// <param name="projections"> All available <see cref="IProjection{T}"/> instances. </param>
/// <param name="projectionCache"> Used to save projected state. </param>
/// <param name="log"> Used for logging. </param>
/// <param name="cancel"> Stops the background tasks when called. </param>
public static EventStreamService <TEvent, TState> StartNew(
StorageConfiguration storage,
IEnumerable <IProjection <TEvent> > projections,
IProjectionCacheProvider projectionCache,
ILogAdapter log,
CancellationToken cancel)
=>
new EventStreamService <TEvent, TState>(
storage, projections, projectionCache, log, cancel);
/// <summary> Initialize and start the service. </summary>
/// <remarks>
/// This will start a background task that performs all processing
/// and regularly updates the contents.
/// </remarks>
/// <param name="storage"> Identifies where the event stream data is stored. </param>
/// <param name="projections"> All available <see cref="IProjection{T}"/> instances. </param>
/// <param name="projectionCache"> Used to save projected state. </param>
/// <param name="events">
/// Called on each event committed to the stream (including intial catch-up of
/// already commited events).
/// <see cref="EventStreamWrapper{TEvent,TState}.OnEachCommitted"/>
/// </param>
/// <param name="log"> Used for logging. </param>
/// <param name="cancel"> Stops the background tasks when called. </param>
public static EventStreamService <TEvent, TState> StartNew(
StorageConfiguration storage,
IEnumerable <IProjection <TEvent> > projections,
IProjectionCacheProvider projectionCache,
IEnumerable <Tuple <EventStream <TEvent> .Listener, uint> > events,
ILogAdapter log,
CancellationToken cancel)
{
return(new EventStreamService <TEvent, TState>(
storage, projections, projectionCache, events, log, cancel));
}
/// <remarks>
/// This constructor is private so that it is obvious (via <c>StartNew</c>)
/// that background tasks are being creatd.
/// </remarks>
private EventStreamService(
StorageConfiguration storage,
IEnumerable <IProjection <TEvent> > projections,
IProjectionCacheProvider projectionCache,
ILogAdapter log,
CancellationToken cancel) : base(TimeSpan.FromSeconds(30), cancel)
{
_log = log;
_cancel = cancel;
Wrapper = new EventStreamWrapper <TEvent, TState>(storage, projections, projectionCache, log);
Quarantine = Wrapper.Quarantine;
Ready = Task.Run(Initialize, cancel);
}
/// <remarks>
/// This constructor is private so that it is obvious (via <c>StartNew</c>)
/// that background tasks are being creatd.
/// </remarks>
private EventStreamService(
StorageConfiguration storage,
IEnumerable <IProjection <TEvent> > projections,
IProjectionCacheProvider projectionCache,
IEnumerable <Tuple <EventStream <TEvent> .Listener, uint> > events,
ILogAdapter log,
CancellationToken cancel)
{
_log = log;
_cancel = cancel;
Wrapper = new EventStreamWrapper <TEvent, TState>(storage, projections, projectionCache, log);
Quarantine = Wrapper.Quarantine;
if (events != null)
{
foreach (var pair in events)
{
Wrapper.OnEachCommitted(pair.Item1, pair.Item2);
}
}
Ready = Task.Run(Initialize, cancel);
Task.Run(Loop, cancel);
}
