public Task CommitAsync(EventProviderTransaction transaction)
{
Contract.Requires(transaction != null);
Contract.Ensures(Contract.Result <Task>() != null);
throw new NotImplementedException();
}
public void Commit(EventProviderTransaction transaction)
{
Contract.Requires(transaction != null);
// static checker fails when using ForAll
//Contract.Ensures(Contract.ForAll(transaction.Revisions, o => o.Committed));
//Contract.EnsuresOnThrow<Exception>(Contract.ForAll(transaction.Revisions, o => o.Committed == false));
}
private static IEnumerable <IProjectionContext> CreateProjectionContext(EventProviderTransaction eventProviderTransaction)
{
Contract.Requires(eventProviderTransaction != null);
Contract.Ensures(Contract.Result <IEnumerable <IProjectionContext> >() != null);
var contexts = new Collection <IProjectionContext>();
// go through each revision in the transaction
foreach (var revision in eventProviderTransaction.Revisions.OrderBy(x => x.Version))
{
Contract.Assume(revision != null);
// check for domain event revision
var domainEventRevision = revision as DomainEventRevision;
if (domainEventRevision == null)
{
// must be a snapshot revision
var snapshotRevision = revision as SnapshotRevision;
Contract.Assume(snapshotRevision != null);
// convert snapshot revision to snapshot projection context
contexts.Add(new ProjectionContext(eventProviderTransaction.EventProvider,
eventProviderTransaction.Identity,
eventProviderTransaction.Command,
eventProviderTransaction.Metadata,
revision.Version,
snapshotRevision.Snapshot));
}
else
{
// revision is domain event revision, go through each domain event and create a projection context
foreach (var domainEvent in domainEventRevision.DomainEvents)
{
Contract.Assume(domainEvent != null);
contexts.Add(new ProjectionContext(eventProviderTransaction.EventProvider,
eventProviderTransaction.Identity,
eventProviderTransaction.Command,
eventProviderTransaction.Metadata,
revision.Version,
domainEvent));
}
}
}
return(contexts);
}
public void Dispatch(EventProviderTransaction eventProviderTransaction)
{
// find projection managers from aggregate root type
var managers = _projectionManagerFactory.GetManagers(eventProviderTransaction.EventProvider.AggregateRootType);
// check if any managers exist
if (managers.Any())
{
// create projection contexts grouped by event provider and ordered by revision
var eventProviderContexts = CreateProjectionContext(eventProviderTransaction).ToArray();
SendContextsToProjectionManagers(eventProviderTransaction.EventProvider, managers, eventProviderContexts);
}
// save transaction identity to know its been processed
_processedTransactions.Add(eventProviderTransaction.Identity);
}
protected override async Task CommitTransactionAsync(EventProviderTransaction transaction)
{
// establish command
var command = new CommitTransactionCommand(_serializer,
_typeFactory,
transaction,
transaction.Revisions);
// create connection
using (var conn = new SqlConnection(_connectionString))
{
// connection needs to be open before executing
await conn.OpenAsync();
// execute
await command.ExecuteAsync(conn);
}
}
private ICollection <EventProviderTransactionCollection> GetResult()
{
var transactionCollectionGroups = _revisions.GroupBy(x => new { x.EventProviderId, x.AggregateRootId }).ToArray();
var transactionCollections = new EventProviderTransactionCollection[transactionCollectionGroups.Length];
// loop through each event provider creating transactions
for (var eventProviderGroupIndex = 0; eventProviderGroupIndex < transactionCollections.Length; eventProviderGroupIndex++)
{
// get current event provider group
var eventProviderGroup = transactionCollectionGroups[eventProviderGroupIndex];
// create transaction array for event provider
var transactions = new EventProviderTransaction[eventProviderGroup.Select(x => x.TransactionId).Distinct().Count()];
// filter our event provider's domain events
var eventProviderEvents = _sqlDomainEvents
.Where(x => x.EventProviderId == eventProviderGroup.Key.EventProviderId)
.ToArray();
// order revisions by version then group by transaction
var eventProviderTransactions = eventProviderGroup
.OrderBy(x => x.EventProviderVersion)
.GroupBy(x => x.TransactionId)
.ToArray();
// create event provider
var eventProvider = new EventProvider(eventProviderGroup.Key.EventProviderId, _aggregateRootType, eventProviderGroup.Key.AggregateRootId);
// add new event provider transaction collection to result
transactionCollections[eventProviderGroupIndex] = new EventProviderTransactionCollection(eventProvider, transactions);
// go through each transaction adding revisions and domain events
for (var eventProviderTransactionIterator = 0; eventProviderTransactionIterator < eventProviderTransactions.Length; eventProviderTransactionIterator++)
{
transactions[eventProviderTransactionIterator] = CreateEventProviderTransaction(eventProvider,
eventProviderEvents,
eventProviderTransactions[eventProviderTransactionIterator].ToArray());
}
}
return(transactionCollections);
}
public CommitTransactionCommand(SqlSerializer serializer,
ITypeFactory typeFactory,
EventProviderTransaction transaction,
IReadOnlyCollection <EventStreamRevision> uncommittedRevisions)
{
Contract.Requires(serializer != null);
Contract.Requires(typeFactory != null);
Contract.Requires(transaction != null);
Contract.Requires(uncommittedRevisions != null);
_serializer = serializer;
_typeFactory = typeFactory;
_result = new SqlParameter("result", SqlDbType.Int)
{
Direction = ParameterDirection.ReturnValue
};
_command = CreateSqlCommand(transaction, uncommittedRevisions);
}
private SqlCommand CreateSqlCommand(EventProviderTransaction transaction, IReadOnlyCollection <EventStreamRevision> uncommittedRevisions)
{
var sqlCommand = new SqlCommand("[dbo].[CreateTransaction]");
sqlCommand.CommandType = CommandType.StoredProcedure;
var command = transaction.Command;
var eventProvider = transaction.EventProvider;
var commandType = command.GetType();
// set return parameter
sqlCommand.Parameters.Add(_result);
// set parameters
sqlCommand.Parameters.Add("@transactionId", SqlDbType.UniqueIdentifier).Value = transaction.Identity.Value;
sqlCommand.Parameters.Add("@metadata", SqlDbType.VarBinary).Value = _serializer.SerializeObject(transaction.Metadata);
sqlCommand.Parameters.Add("@commandId", SqlDbType.UniqueIdentifier).Value = command.CommandId;
sqlCommand.Parameters.Add("@commandTypeId", SqlDbType.Binary, 16).Value = _typeFactory.GetHash(commandType);
sqlCommand.Parameters.Add("@commandTypeFullName", SqlDbType.VarChar, 512).Value = commandType.FullName;
sqlCommand.Parameters.Add("@commandData", SqlDbType.VarBinary).Value = _serializer.SerializeObject(command);
sqlCommand.Parameters.Add("@eventProviderId", SqlDbType.UniqueIdentifier).Value = eventProvider.Identity.Value;
sqlCommand.Parameters.Add("@aggregateRootId", SqlDbType.UniqueIdentifier).Value = eventProvider.AggregateRootIdentity.Value;
sqlCommand.Parameters.Add("@aggregateRootTypeId", SqlDbType.Binary, 16).Value = _typeFactory.GetHash(eventProvider.AggregateRootType.Type);
sqlCommand.Parameters.Add("@aggregateRootTypeFullName", SqlDbType.VarChar, 512).Value = eventProvider.AggregateRootType.Type.FullName;
sqlCommand.Parameters.Add("@eventProviderDescriptor", SqlDbType.VarChar).Value = transaction.Descriptor.Value;
// event user defined table type
sqlCommand.Parameters.Add(new SqlParameter("@events", SqlDbType.Structured)
{
TypeName = "[dbo].[udttEvent]",
Value = GetEventDataTable(uncommittedRevisions)
});
return(sqlCommand);
}
public void Dispatch(EventProviderTransaction eventProviderTransaction)
{
Contract.Requires(eventProviderTransaction != null);
throw new NotImplementedException();
}
protected override void TransactionCommitted(EventProviderTransaction transaction)
{
_dispatcher.Dispatch(transaction);
}
public void Dispatch(EventProviderTransaction eventProviderTransaction)
{
Contract.Assume(Queue != null);
Queue.Add(new QueueItem <EventProviderTransaction>(eventProviderTransaction));
}
public abstract void Project(EventProviderTransaction transaction);
protected override void TransactionCommitted(EventProviderTransaction transaction)
{
Contract.Requires(transaction != null);
throw new NotImplementedException();
}