public Task <IExchange> DeclareExchangeAsync(IAdvancedBus advancedBus, Type messageType, string exchangeType)
{
var conventions = advancedBus.Container.Resolve <IConventions>();
var messageVersions = new MessageVersionStack(messageType);
return(DeclareVersionedExchangesAsync(advancedBus, conventions, messageVersions, exchangeType));
}
public IExchange DeclareExchange(IAdvancedBus advancedBus, Type messageType, string exchangeType)
{
var conventions = advancedBus.Container.Resolve <IConventions>();
var messageVersions = new MessageVersionStack(messageType);
var publishExchange = DeclareVersionedExchanges(advancedBus, conventions, messageVersions, exchangeType);
return(publishExchange);
}
private MessageTypeProperty(ITypeNameSerializer typeNameSerializer, Type messageType)
{
this.typeNameSerializer = typeNameSerializer;
var messageVersions = new MessageVersionStack(messageType);
// MessageVersionStack has most recent version at the bottom of the stack (hence the reverse)
// and includes the actual message type (hence the first / removeat)
alternativeTypes = messageVersions
.Select(typeNameSerializer.Serialize)
.Reverse()
.ToList();
this.messageType = alternativeTypes.First();
alternativeTypes.RemoveAt(0);
}
private IExchange DeclareVersionedExchanges(MessageVersionStack messageVersions, string exchangeType)
{
IExchange destinationExchange = null;
while (!messageVersions.IsEmpty())
{
var messageType = messageVersions.Pop();
var exchangeName = conventions.ExchangeNamingConvention(messageType);
var sourceExchange = DeclareExchange(exchangeName, exchangeType);
if (destinationExchange != null)
{
advancedBus.Bind(sourceExchange, destinationExchange, "#");
}
destinationExchange = sourceExchange;
}
return(destinationExchange);
}
private async Task <IExchange> DeclareVersionedExchangesAsync(MessageVersionStack messageVersions, string exchangeType)
{
IExchange destinationExchange = null;
while (!messageVersions.IsEmpty())
{
var messageType = messageVersions.Pop();
var exchangeName = conventions.ExchangeNamingConvention(messageType);
var sourceExchange = await DeclareExchangeAsync(exchangeName, exchangeType).ConfigureAwait(false);
if (destinationExchange != null)
{
await advancedBus.BindAsync(sourceExchange, destinationExchange, "#").ConfigureAwait(false);
}
destinationExchange = sourceExchange;
}
return(destinationExchange);
}
public Task <IExchange> DeclareExchangeAsync(Type messageType, string exchangeType)
{
var messageVersions = new MessageVersionStack(messageType);
return(DeclareVersionedExchangesAsync(messageVersions, exchangeType));
}
public IExchange DeclareExchange(Type messageType, string exchangeType)
{
var messageVersions = new MessageVersionStack(messageType);
return(DeclareVersionedExchanges(messageVersions, exchangeType));
}
private IExchange DeclareVersionedExchanges(IAdvancedBus advancedBus, IConventions conventions, MessageVersionStack messageVersions, string exchangeType)
{
// This works because the message version stack is LIFO from most superseded message type to the actual message type
IExchange destinationExchange = null;
while (!messageVersions.IsEmpty())
{
var messageType = messageVersions.Pop();
var exchangeName = conventions.ExchangeNamingConvention(messageType);
var sourceExchange = DeclareExchange(advancedBus, exchangeName, exchangeType);
if (destinationExchange != null)
{
advancedBus.Bind(sourceExchange, destinationExchange, "#");
}
destinationExchange = sourceExchange;
}
return(destinationExchange);
}
private Task <IExchange> DeclareVersionedExchanges(IAdvancedBus advancedBus, IConventions conventions, MessageVersionStack messageVersions, string exchangeType)
{
var destinationExchangeTask = TaskHelpers.FromResult <IExchange>(null);
while (!messageVersions.IsEmpty())
{
var messageType = messageVersions.Pop();
var exchangeName = conventions.ExchangeNamingConvention(messageType);
destinationExchangeTask = destinationExchangeTask.Then(destinationExchange => DeclareExchangeAsync(advancedBus, exchangeName, exchangeType).Then(sourceExchange =>
{
if (destinationExchange != null)
{
return(advancedBus.BindAsync(sourceExchange, destinationExchange, "#").Then(() => sourceExchange));
}
return(TaskHelpers.FromResult(sourceExchange));
}));
}
return(destinationExchangeTask);
}
