protected override async Task ExecuteAsync(CancellationToken cancellationToken = default)
{
_logger.LogInformation("MessageBusSubscriberService for message type {MessageType} is starting", typeof(TMessage).GetPrettyName());
Task HandleMsg(MessagingEnvelope <TMessage> msg) => Handle(msg, cancellationToken);
await _messageBusSubscriber.SubscribeAsync(HandleMsg, cancellationToken, null, _subscriberOptions);
await cancellationToken.WhenCanceled();
await _messageBusSubscriber.UnSubscribeAsync(HandleMsg, CancellationToken.None);
_logger.LogInformation("MessageBusSubscriberService for message type {MessageType} is stopping", typeof(TMessage).GetPrettyName());
}
public static async Task <MessagingEnvelope <TMessage> > WaitForMessage <TMessage>(this IMessageBusSubscriber <TMessage> subscriber,
Func <MessagingEnvelope <TMessage>, bool> predicate,
CancellationToken cancellationToken = default)
{
var tcs = new TaskCompletionSource <MessagingEnvelope <TMessage> >();
async Task HandleMessage(MessagingEnvelope <TMessage> msg)
{
if (predicate(msg))
{
tcs.SetResult(msg);
await subscriber.UnSubscribeAsync(HandleMessage, cancellationToken);
}
}
await subscriber.SubscribeAsync(HandleMessage, cancellationToken);
return(await tcs.Task);
}
