/**
* Adds the given projection.
*
* @param projection the projection to add
* @return this
*/
public IExitOperationsCollector AddProjection(IProjection projection)
{
if (projection.GetType().IsAssignableFrom(distinct.GetType()))
{
this.distinct = (Distinct)projection;
//TODO: Distinct doesn't work yet
log.Error("Distinct is not ready yet");
throw new NotSupportedException();
}
if (projection.GetType().IsAssignableFrom(rowCountProjection.GetType()))
{
rowCountProjection = (RowCountProjection)projection;
}
if (projection.GetType().IsAssignableFrom(aggregateProjection.GetType()))
{
if (projection.ToString().ToLower().StartsWith("avg"))
{
this.avgProjection = (AggregateProjection)projection;
}
else
{
this.aggregateProjection = (AggregateProjection)projection;
}
}
else
{
log.Error("Adding an unsupported Projection: " + projection.GetType().Name);
throw new NotSupportedException();
}
return(this);
}
/**
* Adds the given projection.
*
* @param projection the projection to add
* @return this
*/
public IExitOperationsCollector AddProjection(IProjection projection)
{
if (projection.GetType().IsAssignableFrom(distinct.GetType()))
{
this.distinct = (Distinct) projection;
//TODO: Distinct doesn't work yet
log.Error("Distinct is not ready yet");
throw new NotSupportedException();
}
if (projection.GetType().IsAssignableFrom(rowCountProjection.GetType()))
{
rowCountProjection = (RowCountProjection) projection;
}
if (projection.GetType().IsAssignableFrom(aggregateProjection.GetType()))
{
if (projection.ToString().ToLower().StartsWith("avg"))
{
this.avgProjection = (AggregateProjection)projection;
}
else
{
this.aggregateProjection = (AggregateProjection)projection;
}
}
else
{
log.Error("Adding an unsupported Projection: " + projection.GetType().Name);
throw new NotSupportedException();
}
return this;
}
public IProjectionExitOperation GetProjectionExitOperation(IProjection projection, ISessionFactoryImplementor sessionFactoryImplementor)
{
if (projection.GetType().IsAssignableFrom(typeof(RowCountExitOperation)))
{
return(new RowCountExitOperation(projection));
}
if (projection.GetType().IsAssignableFrom(typeof(AggregateProjection)))
{
return(new AggregateExitOperation(projection));
}
throw new NotSupportedException("This project is not supported: " + projection.GetType());
}
public IProjectionExitOperation GetProjectionExitOperation(IProjection projection, ISessionFactoryImplementor sessionFactoryImplementor)
{
if (projection.GetType().IsAssignableFrom(typeof(RowCountExitOperation)))
{
return new RowCountExitOperation(projection);
}
if (projection.GetType().IsAssignableFrom(typeof(AggregateProjection)))
{
return new AggregateExitOperation(projection);
}
throw new NotSupportedException("This project is not supported: " + projection.GetType());
}
void StartProjection(IProjection projection)
{
var checkpoint = GetPosition(projection.GetType());
var sub = eventStoreConnection.SubscribeToAllFrom(
checkpoint,
new CatchUpSubscriptionSettings(500, 100, true, false),
EventAppeared(projection),
LiveProcessingStarted(projection),
SubDropped(),
userCredentials: new UserCredentials("admin", "changeit")
);
Console.WriteLine("Started Projection: " + projection.GetType().Name);
}
public InlineProjectionSource(IProjection projection)
{
_projection = projection;
// TODO -- this probably gets fancier later
ProjectionName = projection.GetType().FullName;
}
public static IProjection <int, T> Create <T>(int countFirst, IProjection <int, T> first, IProjection <int, T> second)
{
var typeArgs = new[] { typeof(T), first.GetType(), second.GetType(), };
var constructorArgs = new object[] { countFirst, first, second, };
return(Instantiate <IProjection <int, T> >(typeof(SequentialProjection <, ,>), typeArgs, constructorArgs));
}
private Action <StreamSubscription, SubscriptionDroppedReason, Exception> ConnectionDropped(
IProjection projection)
{
return((_, reason, exc) =>
Console.WriteLine(
$"Projection {projection.GetType().Name} dropped with {reason}, Exception: {exc.Message} {exc.StackTrace}"));
}
static Tuple <Type, Type> GetKey(IProjection projection)
{
var types = projection.GetType().GetInterfaces()
.Single(i => i.Name == typeof(IProjection <,>).Name)
.GetGenericArguments();
return(Tuple.Create(types[0], types[1]));
}
Func <StreamSubscription, ResolvedEvent, CancellationToken, Task> EventAppeared(IProjection projection)
{
return(async(s, e, ct) =>
{
Console.WriteLine(
$"Handling Projection {projection.GetType().Name} event {e.Event.EventType} id: {e.Event.EventId}");
if (!projection.CanHandle(e.Event.EventType))
{
return;
}
var deserializedEvent = e.Deserialize();
await projection.HandleAsync(e.Event.EventType, deserializedEvent, ct);
await UpdatePositionAsync(projection.GetType(), e.OriginalPosition !.Value, ct);
});
}
public ICriteria SetProjection(IProjection projectionValue)
{
criteriaCollector.AddProjection(projectionValue);
if (projectionValue.GetType().IsAssignableFrom(typeof(AvgProjection)))
{
SetAvgProjection(projectionValue);
}
//TODO - handle ProjectionList
return(this);
}
public static Type[] GetEvents(this IProjection projection)
{
var type = projection.GetType();
var events = type.GetInterfaces()
.Where(i => i.IsGenericType && i.GetGenericTypeDefinition() == typeof(IEventHandler <>))
.SelectMany(i => i.GetGenericArguments())
.ToArray();
return(events);
}
void StartProjection(IProjection projection)
{
var checkpoint = GetPosition(projection.GetType());
_eventStoreConnection.SubscribeToAllFrom(
checkpoint,
CatchUpSubscriptionSettings.Default,
EventAppeared(projection),
LiveProcessingStarted(projection));
}
/// <summary>
/// Initializes a new instance of the <see cref="BaseDataColumn{T}" />
/// class.
/// </summary>
/// <param name="configuration">
/// The configuration of this column.
/// </param>
/// <param name="projection">
/// The projection that projects the data in the column.
/// </param>
/// <exception cref="System.ArgumentNullException">
/// <paramref name="configuration"/> is <c>null</c>.
/// - or -
/// <paramref name="projection"/> is <c>null</c>.
/// </exception>
public BaseDataColumn(
ColumnConfiguration configuration,
IProjection <int, T> projection)
{
Guard.NotNull(configuration, nameof(configuration));
Guard.NotNull(projection, nameof(projection));
this.Configuration = configuration;
this.ProjectorInterface = projection.GetType();
this.Projector = projection;
}
public static IProjection <int, T> CreateFromOffset <T>(IProjection <int, T> projection, int offset)
{
if (!(projection is IMapListToStream))
{
throw new InvalidOperationException("The projection being based in must have been constructed using SequentialColumn.CreateComputedColumn");
}
var typeArgs = new[] { typeof(T), projection.GetType(), };
var constructorArgs = new object[] { projection, offset, };
return(Instantiate <IProjection <int, T> >(typeof(SequentialProjectionFromOffset <,>), typeArgs, constructorArgs));
}
Action <EventStoreCatchUpSubscription, ResolvedEvent> EventAppeared(IProjection projection)
{
return((s, e) =>
{
if (!projection.CanHandle(e.Event.EventType))
{
UpdatePosition(projection.GetType(), e.OriginalPosition.Value);
return;
}
Console.WriteLine("Processing");
Console.WriteLine(e.Event.EventStreamId);
Console.WriteLine(e.Event.EventNumber);
Console.WriteLine(e.Event.EventType);
var deserializedEvent = e.Deserialize();
projection.Handle(e.Event.EventType, deserializedEvent);
UpdatePosition(projection.GetType(), e.OriginalPosition.Value);
});
}
public static string CalculateMD5(IProjection projection)
{
var typeSource = projection as ITrackStructureChanges;
var dtoTypes = (typeSource == null) ? new Type[0] : typeSource.TrackTypes;
var hashSource = new StringBuilder(100);
AddTypeHash(projection.GetType(), hashSource);
hashSource.Append(dtoTypes.Length);
foreach (var type in dtoTypes.OrderBy(x => x.Name).ToList())
AddTypeHash(type, hashSource);
return ToMD5(hashSource.ToString());
}
Action <EventStoreCatchUpSubscription, ResolvedEvent> EventAppeared(IProjection projection)
{
return((s, e) =>
{
if (!projection.CanHandle(e.Event.EventType))
{
return;
}
var deserializedEvent = e.Deserialize();
projection.Handle(e.Event.EventType, deserializedEvent);
UpdatePosition(projection.GetType(), e.OriginalPosition.Value);
});
}
public static string CalculateMD5(IProjection projection)
{
var typeSource = projection as ITrackStructureChanges;
var dtoTypes = (typeSource == null) ? new Type[0] : typeSource.TrackTypes;
var hashSource = new StringBuilder(100);
AddTypeHash(projection.GetType(), hashSource);
hashSource.Append(dtoTypes.Length);
foreach (var type in dtoTypes.OrderBy(x => x.Name).ToList())
{
AddTypeHash(type, hashSource);
}
return(ToMD5(hashSource.ToString()));
}
/// <summary>
/// Creates a projection that returns the TimestampDelta in nanoseconds as a <see cref="double"/>.
/// </summary>
/// <param name="column">
/// Projection that returns a <see cref="TimestampDelta"/>.
/// </param>
/// <returns>
/// Projection that returns a nanosecond count as a double.
/// </returns>
public static IProjection <int, double> Create(IProjection <int, TimestampDelta> column)
{
Guard.NotNull(column, nameof(column));
var typeArgs = new[]
{
column.GetType(),
};
var constructorArgs = new object[]
{
column,
};
var type = typeof(TimestampDeltaToDoubleColumnGenerator <>).MakeGenericType(typeArgs);
var instance = Activator.CreateInstance(type, constructorArgs);
return((IProjection <int, double>)instance);
}
private static void AddProjectionEvents(IDictionary <Type, List <IProjection> > projectionsByEventType, IProjection projection)
{
var interfaces = projection.GetType().GetInterfaces().Where(x => x.Name == typeof(IEventListener <>).Name);
foreach (var @interface in interfaces)
{
var eventType = @interface.GetGenericArguments()[0];
if (projectionsByEventType.TryGetValue(eventType, out var projections))
{
projections.Add(projection);
}
else
{
projectionsByEventType.Add(eventType, new List <IProjection> {
projection
});
}
}
}
public static IProjection <int, TimeRange> CreatePercent(IProjection <int, TimeRange> timeRangeColumn)
{
Guard.NotNull(timeRangeColumn, nameof(timeRangeColumn));
var typeArgs = new[]
{
timeRangeColumn.GetType(),
};
var constructorArgs = new object[]
{
timeRangeColumn,
};
var type = typeof(ClipTimeToViewportTimeRangePercentColumnGenerator <>).MakeGenericType(typeArgs);
var instance = Activator.CreateInstance(type, constructorArgs);
return((IProjection <int, TimeRange>)instance);
}
public virtual ReplayDefinition UseProjection(IProjection projection)
{
var contractId = projection.GetType().GetContractId();
// Ignore using projections which are not registered
var projectionWithEvents = registeredProjections.FirstOrDefault(x => x.Projection.GetType().GetContractId() == contractId);
if (ReferenceEquals(null, projectionWithEvents) == true)
{
return(this);
}
// Ignore adding projections that are already added
if (availableForReplayProjections.Any(x => x.Projection.GetType().GetContractId() == contractId) == true)
{
return(this);
}
availableForReplayProjections.Add(projectionWithEvents);
return(this);
}
/// <summary>
/// Creates a projector that results in a dividing the value of the numerator projection
/// by the value of the denominator projection.
/// </summary>
/// <param name="numeratorColumn">
/// Numerator projection.
/// </param>
/// <param name="divisorColumn">
/// Denominator projection.
/// </param>
/// <returns>
/// Projection of the computed division.
/// </returns>
public static IProjection <int, double> Create(
IProjection <int, double> numeratorColumn,
IProjection <int, double> divisorColumn)
{
Guard.NotNull(numeratorColumn, nameof(numeratorColumn));
Guard.NotNull(divisorColumn, nameof(divisorColumn));
var typeArgs = new[]
{
numeratorColumn.GetType(),
divisorColumn.GetType(),
};
var constructorArgs = new object[]
{
numeratorColumn,
divisorColumn,
};
var type = typeof(PercentGenerator <,>).MakeGenericType(typeArgs);
var instance = Activator.CreateInstance(type, constructorArgs);
return((IProjection <int, double>)instance);
}
async Task StartProjectionAsync(IProjection projection, CancellationToken ct)
{
var checkpoint = await GetPositionAsync(projection.GetType(), ct);
if (checkpoint.HasValue)
{
await _eventStore.SubscribeToAllAsync(
checkpoint.Value,
EventAppeared(projection),
false,
ConnectionDropped(projection) !,
cancellationToken : ct
);
}
else
{
await _eventStore.SubscribeToAllAsync(
EventAppeared(projection),
false,
ConnectionDropped(projection) !,
cancellationToken : ct
);
}
}
Action <EventStoreCatchUpSubscription> LiveProcessingStarted(IProjection projection)
{
return(s => Console.WriteLine($"Projection {projection.GetType().Name} has caught up, now processing live"));
}
public static Type ProjectedType(this IProjection projection)
{
return((projection as IDocumentProjection)?.Produces ?? projection.GetType());
}
private static string GetName(IProjection projection)
{
return projection.GetType().FullName;
}
public string GetModifiedReason(IProjection projection)
{
return(modifiedReasons[projection.GetType()]);
}
public ProjectionWrapper(IProjection projection, ProjectionLifecycle lifecycle) : base(projection.GetType().FullNameInCode())
{
_projection = projection;
Lifecycle = lifecycle;
}
private static string GetName(IProjection projection)
{
return(projection.GetType().FullName);
}
public void MarkAsUnmodified(IProjection projection)
{
modifiedReasons[projection.GetType()] = string.Empty;
}