/// <summary>
/// 监听
/// </summary>
/// <param name="subscribers"></param>
/// <param name="action"></param>
/// <param name="cancellationToken"></param>
/// <returns></returns>
public void Listen(KafkaSubscriber[] subscribers, Action <RecieveResult> action = null, CancellationToken cancellationToken = default)
{
ListenResult result = new ListenResult();
cancellationToken.Register(() =>
{
result.Stop();
});
using (var consumer = CreateConsumer(result, subscribers))
{
while (!result.Stoped)
{
InternalListen(consumer, result.Token, action);
}
}
}
/// <summary>
/// 异步监听
/// </summary>
/// <param name="subscribers"></param>
/// <param name="action"></param>
/// <returns></returns>
public async Task <ListenResult> ListenAsync(KafkaSubscriber[] subscribers, Action <RecieveResult> action = null)
{
ListenResult result = new ListenResult();
new Task(() =>
{
using (var consumer = CreateConsumer(result, subscribers))
{
while (!result.Stoped)
{
InternalListen(consumer, result.Token, action);
}
}
}).Start();
return(await Task.FromResult(result));
}
/// <summary>
/// 创建一个消费者
/// </summary>
/// <param name="listenResult"></param>
/// <param name="subscribers"></param>
/// <returns></returns>
private IConsumer <string, object> CreateConsumer(ListenResult listenResult, params KafkaSubscriber[] subscribers)
{
if (disposed)
{
throw new ObjectDisposedException(nameof(KafkaConsumer));
}
CheckSubscribers(subscribers);
CreateConsumerBuilder();
var consumer = builder.Build();
listenResult.Token.Register(() =>
{
consumer.Dispose();
});
SetSubscribers(consumer, subscribers);
consumers.Add(consumer);
return(consumer);
}
