protected virtual async ValueTask OnMessageAsync(Message message, CancellationToken cancellationToken)
{
var isProcessed = false;
switch (message)
{
case SubscribeMessage sm:
if (sm.PublisherId != Publisher.Id)
{
break;
}
var publication = Publisher.TryGet(sm.PublicationId);
if (publication == null)
{
break;
}
await PublisherImpl
.SubscribeAsync(Channel, publication, sm, cancellationToken)
.ConfigureAwait(false);
isProcessed = true;
break;
case UnsubscribeMessage um:
if (um.PublisherId != Publisher.Id)
{
break;
}
publication = Publisher.TryGet(um.PublicationId);
if (publication == null)
{
break;
}
await PublisherImpl
.UnsubscribeAsync(Channel, publication, cancellationToken)
.ConfigureAwait(false);
isProcessed = true;
break;
}
if (!isProcessed && message is PublicationMessage pm)
{
var response = new PublicationAbsentsMessage()
{
PublisherId = pm.PublisherId,
PublicationId = pm.PublicationId,
};
await Channel.Writer
.WriteAsync(response, cancellationToken)
.ConfigureAwait(false);
}
}
protected virtual async ValueTask OnUnsupportedMessage(BridgeMessage message, CancellationToken cancellationToken)
{
if (message is ReplicaMessage rm)
{
var response = new PublicationAbsentsMessage()
{
PublisherId = rm.PublisherId,
PublicationId = rm.PublicationId,
};
await Channel.Writer
.WriteAsync(response, cancellationToken)
.ConfigureAwait(false);
}
}