#pragma warning restore 1591 // Xml Comments
/// <summary>
/// Get handle method from an <see cref="EventSource"/> for a specific <see cref="IEvent"/>, if any
/// </summary>
/// <param name="eventSource"><see cref="EventSource"/> to get method from</param>
/// <param name="event"><see cref="IEvent"/> to get method for</param>
/// <returns><see cref="MethodInfo"/> containing information about the handle method, null if none exists</returns>
public static MethodInfo GetOnMethod(this EventSource eventSource, IEvent @event)
{
var eventType = @event.GetType();
var handleMethods = GetHandleMethodsFor(eventSource.GetType());
return(handleMethods.ContainsKey(eventType) ? handleMethods[eventType] : null);
}
public CommittedEventStream GetForEventSource(EventSource eventSource, Guid eventSourceId)
{
var eventSourceType = eventSource.GetType();
var query = Query.And(
Query.EQ("EventSourceId", eventSourceId),
Query.EQ("EventSource", eventSourceType.AssemblyQualifiedName)
);
var cursor = _collection.FindAs<BsonDocument>(query);
var documents = cursor.ToArray();
var events = ToEvents(documents);
var stream = new CommittedEventStream(eventSourceId);
stream.Append(events);
return stream;
}
public CommittedEventStream GetForEventSource(EventSource eventSource, Guid eventSourceId)
{
using (var session = _documentStore.OpenSession())
{
var eventSourceType = eventSource.GetType();
var events = session.Query<IEvent>()
.Where(
e => e.EventSourceId == eventSourceId &&
e.EventSource == eventSourceType.AssemblyQualifiedName
).ToArray();
var stream = new CommittedEventStream(eventSourceId);
stream.Append(events);
return stream;
}
}
public EventSourceVersion GetLastCommittedVersion(EventSource eventSource, Guid eventSourceId)
{
var eventSourceParam = new OracleParameter(EventParameters.EVENTSOURCE, OracleDbType.NVarchar2, 512);
eventSourceParam.Value = eventSource.GetType().AssemblyQualifiedName;
var eventSourceIdParam = new OracleParameter(EventParameters.EVENTSOURCEID, OracleDbType.Raw, 16);
eventSourceIdParam.Value = eventSourceId.ToByteArray();
var version = EventSourceVersion.Zero;
try
{
OpenConnection();
using (var command = _connection.CreateCommand())
{
command.CommandText = LAST_VERSION_STATEMENT;
command.Parameters.Add(eventSourceIdParam);
command.Parameters.Add(eventSourceParam);
command.BindByName = true;
var reader = command.ExecuteReader(CommandBehavior.SingleResult);
if (reader.Read())
{
version = EventSourceVersion.FromCombined(Convert.ToDouble(reader.GetDecimal(0)));
}
}
}
finally
{
EnsureConnectionClosed(_connection);
}
return version;
}
public CommittedEventStream GetForEventSource(EventSource eventSource, Guid eventSourceId)
{
var committedEventStream = new CommittedEventStream(eventSourceId);
var eventSourceParam = new OracleParameter(EventParameters.EVENTSOURCE, OracleDbType.NVarchar2, 512);
eventSourceParam.Value = eventSource.GetType().AssemblyQualifiedName;
var eventSourceIdParam = new OracleParameter(EventParameters.EVENTSOURCEID, OracleDbType.Raw, 16);
eventSourceIdParam.Value = eventSourceId.ToByteArray();
var eventDtos = new List<EventDto>();
try
{
OpenConnection();
using (var command = _connection.CreateCommand())
{
command.CommandText = READ_STATEMENT_FOR_EVENTS_BY_AGGREGATE_ROOT;
command.Parameters.Add(eventSourceIdParam);
command.Parameters.Add(eventSourceParam);
command.BindByName = true;
var reader = command.ExecuteReader();
while (reader.Read())
{
eventDtos.Add(MapReaderToEventDto(reader));
}
}
}
finally
{
EnsureConnectionClosed(_connection);
}
var retrievedEvents = eventDtos.Select(BuildEventInstanceFromDto)
.Select(@event => _eventMigratorManager.Migrate(@event))
.ToList();
if (retrievedEvents.Any())
committedEventStream.Append(retrievedEvents);
return committedEventStream;
}
/// <summary>
/// Indicates whether the Event Source maintains state and requires to handles events to restore that state
/// </summary>
/// <param name="eventSource"><see cref="EventSource"/> to test for state</param>
/// <returns>true if the Event Source does not maintain state</returns>
public static bool IsStateless(this EventSource eventSource)
{
return(GetHandleMethodsFor(eventSource.GetType()).Count == 0);
}