public void UpdateToCurrent(IEventSource aggregate)
{
long start = aggregate.ExpectedVersion + 1;
var id = aggregate.Id;
if (start <= 0)
{
throw new InvalidOperationException("Cannot get version <= 0");
}
string streamName = _streamNameBuilder.GenerateForAggregate(aggregate.GetType(), id);
StreamEventsSlice streamEventsSlice;
do
{
streamEventsSlice = _streamStoreConnection.ReadStreamForward(streamName, start, ReadPageSize);
if (streamEventsSlice is StreamNotFoundSlice)
{
throw new AggregateNotFoundException(id, aggregate.GetType());
}
if (streamEventsSlice is StreamDeletedSlice)
{
throw new AggregateDeletedException(id, aggregate.GetType());
}
start = streamEventsSlice.NextEventNumber;
var events = streamEventsSlice.Events.Select(evt => _eventSerializer.Deserialize(evt)).ToArray();
if (events.Any())
{
aggregate.RestoreFromEvents(events);
}
}while (!streamEventsSlice.IsEndOfStream);
}
/// <summary>
/// Hard delete the aggregate. This permanently deletes the aggregate's stream.
/// </summary>
/// <param name="aggregate">The aggregate to be deleted.</param>
public void HardDelete(IEventSource aggregate)
{
var streamName = _streamNameBuilder.GenerateForAggregate(aggregate.GetType(), aggregate.Id);
var expectedVersion = aggregate.ExpectedVersion;
_streamStoreConnection.HardDeleteStream(streamName, expectedVersion);
}
public void Save(IEventSource aggregate, Guid commitId, Action <IDictionary <string, object> > updateHeaders)
{
var commitHeaders = new Dictionary <string, object>
{
{ CommitIdHeader, commitId },
{ AggregateClrTypeHeader, aggregate.GetType().AssemblyQualifiedName }
};
updateHeaders(commitHeaders);
var streamName = _aggregateIdToStreamName(aggregate.GetType(), aggregate.Id);
var newEvents = aggregate.TakeEvents().ToList();
var expectedVersion = aggregate.ExpectedVersion;
var eventsToSave = newEvents.Select(e => ToEventData(Guid.NewGuid(), e, commitHeaders)).ToList();
if (eventsToSave.Count < WritePageSize)
{
_eventStoreConnection.AppendToStreamAsync(streamName, expectedVersion, eventsToSave).Wait();
}
else
{
var transaction = _eventStoreConnection.StartTransactionAsync(streamName, expectedVersion).Result;
var position = 0;
while (position < eventsToSave.Count)
{
var pageEvents = eventsToSave.Skip(position).Take(WritePageSize);
transaction.WriteAsync(pageEvents).Wait();
position += WritePageSize;
}
transaction.CommitAsync().Wait();
}
if (_outBus != null)
{
foreach (var evt in newEvents)
{
try
{
_outBus.Publish((Message)evt);
}
catch { }//TODO: see if we need to do something here
}
}
//aggregate.ClearUncommittedEvents();
}
public NcqrsEventSource(IEventSource source)
: base("Source_" + source.EventSourceId.ToString(),
"Source_" + source.EventSourceId.ToString())
{
Timestamp = DateTime.UtcNow;
Version = source.Version;
Name = source.GetType().ToString();
}
public NcqrsEventSource(IEventSource source)
: base("Source_" + source.EventSourceId.ToString(),
"Source_" + source.EventSourceId.ToString())
{
Timestamp = DateTime.UtcNow;
Version = source.Version;
Name = source.GetType().ToString();
}
public void Save(IEventSource aggregate, Guid commitId, Action <IDictionary <string, object> > updateHeaders)
{
var jsonText = JsonConvert.SerializeObject(aggregate, SerializerSettings);
File.WriteAllText(
_fileFullName(aggregate.GetType(), aggregate.Id),
jsonText
);
}
public static EventSourceEntity CreateFromEventSource(IEventSource source)
{
Contract.Requires<ArgumentNullException>(source != null, "The source cannot be null.");
return new EventSourceEntity
{
RowKey = source.EventSourceId.ToString(),
PartitionKey = source.GetType().FullName,
Version = source.Version
};
}
private void AddEventSource(IEventSource eventSource, SQLiteTransaction transaction)
{
using (var cmd = new SQLiteCommand(Query.InsertNewProviderQuery, transaction.Connection))
{
cmd.SetTransaction(transaction)
.AddParam("Id", eventSource.EventSourceId)
.AddParam("Type", eventSource.GetType().ToString())
.AddParam("Version", eventSource.Version);
cmd.ExecuteNonQuery();
}
}
/// <summary>
/// Adds the event source to the event store.
/// </summary>
/// <param name="eventSource">The event source to add.</param>
/// <param name="transaction">The transaction.</param>
private static void AddEventSource(IEventSource eventSource, SqlTransaction transaction)
{
using (var command = new SqlCommand(Queries.InsertNewProviderQuery, transaction.Connection))
{
command.Transaction = transaction;
command.Parameters.AddWithValue("Id", eventSource.EventSourceId);
command.Parameters.AddWithValue("Type", eventSource.GetType().ToString());
command.Parameters.AddWithValue("Version", eventSource.Version);
command.ExecuteNonQuery();
}
}
private IDictionary <string, Action <IEventSource, object> > GetCached(IEventSource eventsource, Type eventType)
{
// Wtf is going on here? Well allow me to explain
// In our eventsources we have methods that look like:
// private void Handle(Events.MyEvent e) {}
// and we may also have
// private void Conflict(Events.MyEvent e) {}
// this little cache GetOrAdd is basically searching for those methods and returning an Action the caller
// can use to execute the method
var mappedType = _mapper.GetMappedTypeFor(eventType);
IDictionary <string, Action <IEventSource, object> > handles;
lock (Lock)
{
if (Cache.TryGetValue(eventType, out handles))
{
return(handles);
}
}
var methods = eventsource.GetType()
.GetMethods(BindingFlags.NonPublic | BindingFlags.Instance)
.Where(
m => (m.Name == "Handle" || m.Name == "Conflict") &&
m.GetParameters().Length == 1 &&
m.GetParameters().Single().ParameterType == mappedType &&
m.ReturnParameter.ParameterType == typeof(void));
//.Select(m => new { Method = m, MessageType = m.GetParameters().Single().ParameterType });
var methodInfos = methods as MethodInfo[] ?? methods.ToArray();
if (!methodInfos.Any())
{
return(null);
}
handles = methodInfos.ToDictionary(x => x.Name, x => (Action <IEventSource, object>)((es, m) =>
{
try
{
x.Invoke(es, new[] { m });
}
catch (TargetInvocationException e)
{
ExceptionDispatchInfo.Capture(e.InnerException).Throw();
}
}));
lock (Lock)
{
return(Cache[eventType] = handles);
}
}
// This method discovers all private Apply methods on an event source that take an event as the sole parameter and return void
// and registers them with the given source. The result of the discovery process is cached.
public static void DiscoverRoutes(this IEventSource source, Action <Type, Action <object> > register)
{
if (source == null)
{
throw new ArgumentNullException(nameof(source));
}
if (register == null)
{
throw new ArgumentNullException(nameof(register));
}
var routeFactories = RouteFactoryIndex.GetOrAdd(source.GetType(), typeOfSource => {
var builder = new List <Func <IEventSource, Tuple <Type, Action <object> > > >();
var instanceParameter = Expression.Parameter(typeof(IEventSource), "instance");
var eventParameter = Expression.Parameter(typeof(object), "@event");
foreach (var method in
typeOfSource
.GetMethods(BindingFlags.NonPublic | BindingFlags.Instance)
.Where(candidateMethod =>
candidateMethod.Name == "Apply" &&
candidateMethod.GetParameters().Length == 1 &&
candidateMethod.ReturnType == typeof(void)
)
)
{
var typeOfEvent = method.GetParameters()[0].ParameterType;
var route = Expression.Lambda <Action <IEventSource, object> >(
Expression.Call(
Expression.Convert(instanceParameter, typeOfSource),
method,
Expression.Convert(eventParameter, typeOfEvent)),
instanceParameter,
eventParameter
).Compile();
builder.Add(
instance =>
Tuple.Create <Type, Action <object> >(
typeOfEvent,
@event => route(instance, @event))
);
}
return(builder.ToArray());
});
Array.ForEach(routeFactories, routeFactory => {
var route = routeFactory(source);
register(route.Item1, route.Item2);
});
}
public void Save(IEventSource aggregate)
{
var commitHeaders = new Dictionary <string, object>
{
{ CommitIdHeader, Guid.NewGuid() /*commitId*/ },
{ AggregateClrTypeNameHeader, aggregate.GetType().AssemblyQualifiedName },
{ AggregateClrTypeHeader, aggregate.GetType().Name }
};
var streamName = _streamNameBuilder.GenerateForAggregate(aggregate.GetType(), aggregate.Id);
var newEvents = aggregate.TakeEvents().ToArray();
var expectedVersion = aggregate.ExpectedVersion;
var eventsToSave = new EventData[newEvents.Length];
for (int i = 0; i < newEvents.Length; i++)
{
eventsToSave[i] =
_eventSerializer.Serialize(
newEvents[i],
new Dictionary <string, object>(commitHeaders));
}
_streamStoreConnection.AppendToStream(streamName, expectedVersion, null, eventsToSave);
}
public IEnumerable<ISourcedEventHandler> GetEventHandlersFromAggregateRoot(IEventSource eventSource)
{
Contract.Requires<ArgumentNullException>(eventSource != null, "The eventSource cannot be null.");
Contract.Ensures(Contract.Result<IEnumerable<ISourcedEventHandler>>() != null, "The result should never be null.");
var targetType = eventSource.GetType();
var handlers = new List<ISourcedEventHandler>();
Logger.DebugFormat("Trying to get all event handlers based by convention for {0}.", targetType);
var methodsToMatch = targetType.GetMethods(BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance);
var matchedMethods = from method in methodsToMatch
let parameters = method.GetParameters()
let noEventHandlerAttributes =
method.GetCustomAttributes(typeof(NoEventHandlerAttribute), true)
where
// Get only methods where the name matches.
Regex.IsMatch(method.Name, _regexPattern, RegexOptions.CultureInvariant) &&
// Get only methods that have 1 parameter.
parameters.Length == 1 &&
// Get only methods where the first parameter is an event.
typeof(IEvent).IsAssignableFrom(parameters[0].ParameterType) &&
// Get only methods that are not marked with the no event handler attribute.
noEventHandlerAttributes.Length == 0
select
new { MethodInfo = method, FirstParameter = method.GetParameters()[0] };
foreach (var method in matchedMethods)
{
var methodCopy = method.MethodInfo;
Type firstParameterType = methodCopy.GetParameters().First().ParameterType;
Action<IEvent> invokeAction = (e) => methodCopy.Invoke(eventSource, new object[] { e });
Logger.DebugFormat("Created event handler for method {0} based on convention.", methodCopy.Name);
var handler = new TypeThresholdedActionBasedDomainEventHandler(invokeAction, firstParameterType, true);
handlers.Add(handler);
}
return handlers;
}
private void AddConfigTab(IEventSource source)
{
var tabPage = new TabPage
{
Name = source.Name,
Text = "Event Source " + source.GetType().Name
};
var control = source.CreateConfigControl();
if (control != null)
{
control.Dock = DockStyle.Fill;
control.BackColor = SystemColors.ControlLightLight;
tabPage.Controls.Add(control);
this.tabControl.TabPages.Add(tabPage);
}
}
private void AddConfigTab(IEventSource source)
{
var label = source.GetType().Name;
if (esNames.ContainsKey(label))
{
label = esNames[label];
}
var tabPage = new ConfigTabPage
{
Name = source.Name,
Text = "",
IsEventSource = true,
};
var control = source.CreateConfigControl();
if (control != null)
{
control.Dock = DockStyle.Fill;
control.BackColor = SystemColors.ControlLightLight;
tabPage.Controls.Add(control);
var index = 0;
foreach (var page in this.tabControl.TabPages)
{
if (index == 0 || ((ConfigTabPage)page).IsEventSource)
{
index++;
}
else
{
break;
}
}
this.tabControl.TabPages.Insert(index, tabPage);
}
}
private void btnCactbotUpdate_Click(object sender, EventArgs e)
{
try
{
var asm = Assembly.Load("CactbotEventSource");
var checkerType = asm.GetType("Cactbot.VersionChecker");
var loggerType = asm.GetType("Cactbot.ILogger");
var configType = asm.GetType("Cactbot.CactbotEventSourceConfig");
var esList = container.Resolve <Registry>().EventSources;
IEventSource cactbotEs = null;
foreach (var es in esList)
{
if (es.Name == "Cactbot Config" || es.Name == "Cactbot")
{
cactbotEs = es;
break;
}
}
if (cactbotEs == null)
{
MessageBox.Show("Cactbot is loaded but it never registered with OverlayPlugin!", "Error");
return;
}
var cactbotConfig = cactbotEs.GetType().GetProperty("Config").GetValue(cactbotEs);
configType.GetField("LastUpdateCheck").SetValue(cactbotConfig, DateTime.MinValue);
var checker = checkerType.GetConstructor(new Type[] { loggerType }).Invoke(new object[] { cactbotEs });
checkerType.GetMethod("DoUpdateCheck", new Type[] { configType }).Invoke(checker, new object[] { cactbotConfig });
} catch (FileNotFoundException)
{
MessageBox.Show("Could not find Cactbot!", "Error");
} catch (Exception ex)
{
MessageBox.Show("Failed: " + ex.ToString(), "Error");
}
}
/// <summary>
/// Gets the event handlers from aggregate root based on attributes.
/// </summary>
/// <param name="eventSource">The aggregate root.</param>
/// <see cref="AttributeBasedDomainSourcedEventHandlerMappingStrategy"/>
/// <returns>All the <see cref="IDomainEventHandler"/>'s created based on attribute mapping.</returns>
public IEnumerable<ISourcedEventHandler> GetEventHandlersFromAggregateRoot(IEventSource eventSource)
{
Contract.Requires<ArgumentNullException>(eventSource != null, "The eventSource cannot be null.");
var targetType = eventSource.GetType();
var handlers = new List<ISourcedEventHandler>();
foreach (var method in targetType.GetMethods(BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance | BindingFlags.Static))
{
EventHandlerAttribute attribute;
if (IsMarkedAsEventHandler(method, out attribute))
{
if (method.IsStatic) // Handlers are never static. Since they need to update the internal state of an eventsource.
{
var message = String.Format("The method {0}.{1} could not be mapped as an event handler, since it is static.", method.DeclaringType.Name, method.Name);
throw new InvalidEventHandlerMappingException(message);
}
if (NumberOfParameters(method) != 1) // The method should only have one parameter.
{
var message = String.Format("The method {0}.{1} could not be mapped as an event handler, since it has {2} parameters where 1 is required.", method.DeclaringType.Name, method.Name, NumberOfParameters(method));
throw new InvalidEventHandlerMappingException(message);
}
if (!typeof(IEvent).IsAssignableFrom(FirstParameterType(method))) // The parameter should be an IEvent.
{
var message = String.Format("The method {0}.{1} could not be mapped as an event handler, since it the first parameter is not an event type.", method.DeclaringType.Name, method.Name);
throw new InvalidEventHandlerMappingException(message);
}
var handler = CreateHandlerForMethod(eventSource, method, attribute);
handlers.Add(handler);
}
}
return handlers;
}
public Action <IEventSource, Object> Resolve(IEventSource eventsource, Type eventType)
{
var mappedType = _mapper.GetMappedTypeFor(eventType);
return(_cache.GetOrAdd(mappedType, (key) =>
{
var handleMethod = eventsource.GetType()
.GetMethods(BindingFlags.NonPublic | BindingFlags.Instance)
.SingleOrDefault(
m => m.Name == "Handle" &&
m.GetParameters().Length == 1 &&
m.GetParameters().Single().ParameterType == mappedType &&
m.ReturnParameter.ParameterType == typeof(void));
//.Select(m => new { Method = m, MessageType = m.GetParameters().Single().ParameterType });
if (handleMethod == null)
{
return null;
}
Action <IEventSource, Object> action = (es, m) => handleMethod.Invoke(es, new[] { m });
return action;
}));
}
public void Test_WovenAssembly_WeakEventReferenceRemoved()
{
IEventSource wovenClass = CreateWovenEventSource();
Assert.IsFalse(wovenClass.GetType().Assembly.GetReferencedAssemblies().Any(name => name.FullName.Equals(typeof(WeakEvents.ImplementWeakEventsAttribute).Assembly.FullName)));
}
public void Test_WovenClass_WeakEventAttributeRemoved()
{
IEventSource wovenClass = CreateWovenEventSource();
Assert.AreEqual(0, wovenClass.GetType().GetCustomAttributes(typeof(WeakEvents.ImplementWeakEventsAttribute), false).Length);
}
/// <summary>
/// Adds the event source to the event store.
/// </summary>
/// <param name="eventSource">The event source to add.</param>
/// <param name="transaction">The transaction.</param>
private static void AddEventSource(IEventSource eventSource, SqlTransaction transaction)
{
using (var command = new SqlCommand(InsertNewProviderQuery, transaction.Connection))
{
command.Transaction = transaction;
command.Parameters.AddWithValue("Id", eventSource.Id);
command.Parameters.AddWithValue("Type", eventSource.GetType().ToString());
command.Parameters.AddWithValue("Version", eventSource.Version);
command.ExecuteNonQuery();
}
}
private void WriteSync <K, E>(IEventSource eventSource, string originatorId, EventSourceEntry <K, E> entry, DateTime?utcTimeStamp)
{
int numberOfRetries = 0;
while (true)
{
try
{
eventSource.Write(originatorId, entry, utcTimeStamp).Wait();
return;
}
catch (Exception ex)
{
if (numberOfRetries >= mPolicy.EventSourceRetryLimit)
{
this.LogException(string.Format("Unable to log to event source {0} for {1}-{2}-{3}", eventSource.GetType().Name, entry.EntityType, entry.Key, entry.EntityVersion), ex);
throw;
}
}
Task.Delay(TimeSpan.FromMilliseconds(numberOfRetries * 100)).Wait();
numberOfRetries++;
}
}
private void AddEventSource(IEventSource eventSource, SQLiteTransaction transaction)
{
using (var cmd = new SQLiteCommand(Query.InsertNewProviderQuery, transaction.Connection))
{
cmd.SetTransaction(transaction)
.AddParam("Id", eventSource.EventSourceId)
.AddParam("Type", eventSource.GetType().ToString())
.AddParam("Version", eventSource.Version);
cmd.ExecuteNonQuery();
}
}
public void Save(IEventSource aggregate, Guid commitId, Action <IDictionary <string, object> > updateHeaders)
{
var commitHeaders = new Dictionary <string, object>
{
{ CommitIdHeader, commitId },
{ AggregateClrTypeHeader, aggregate.GetType().AssemblyQualifiedName }
};
updateHeaders(commitHeaders);
var streamName = _aggregateIdToStreamName(aggregate.GetType(), aggregate.Id);
var categoryStreamName = _aggregateTypeToCategoryStreamName(aggregate.GetType());
var newEvents = aggregate.TakeEvents().ToList();
var eventsToSave = newEvents.Select(e => ToEventData(Guid.NewGuid(), e, commitHeaders)).ToList();
List <EventData> stream;
_store.TryGetValue(streamName, out stream);
List <EventData> catStream;
_store.TryGetValue(categoryStreamName, out catStream);
if (stream == null)
{
if (aggregate.ExpectedVersion == ExpectedVersion.Any || aggregate.ExpectedVersion == ExpectedVersion.NoStream)
{
stream = new List <EventData>();
_store.Add(streamName, stream);
if (catStream == null)
{
catStream = new List <EventData>();
_store.Add(categoryStreamName, catStream);
}
}
else
{
throw new WrongExpectedVersionException("Stream " + streamName + " does not exist.");
}
}
if (stream.Count != 0 && stream.Count - 1 != aggregate.ExpectedVersion) // a new stream will be @ version 0
{
throw new AggregateException(new WrongExpectedVersionException(
$"Stream {streamName} at version {stream.Count}, expected version {aggregate.ExpectedVersion}"));
}
stream.AddRange(eventsToSave);
catStream?.AddRange(eventsToSave);
foreach (var evt in eventsToSave)
{
var etName = _eventNameToEventTypeStreamName(evt.Type);
List <EventData> etStream;
if (!_store.TryGetValue(etName, out etStream))
{
etStream = new List <EventData>();
_store.Add(etName, etStream);
}
etStream.Add(evt);
}
foreach (var @event in newEvents.Where(@event => (@event as Message) != null))
{
_bus.Publish(@event as Message);
_history.Add(new Tuple <string, Message>(streamName, @event as Message));
}
// aggregate.ClearUncommittedEvents();
}
