public Consumer(
ConfigurationConsumer configurationConsumer,
IServiceProvider serviceProvider)
: this()
{
_configurationConsumers.Add(configurationConsumer);
_serviceProvider = serviceProvider;
}
private IConsumer <Ignore, string> GenerateTask(ConfigurationConsumer configConsumer)
{
var conf = new ConsumerConfig
{
GroupId = configConsumer.GroupId,
BootstrapServers = configConsumer.Server,
AutoOffsetReset = AutoOffsetReset.Earliest,
};
var consumer = new ConsumerBuilder <Ignore, string>(conf).Build();
consumer.Subscribe(configConsumer.Topic);
return(consumer);
}
public static IServiceCollection AddConsumerKafa(
this IServiceCollection services,
string server)
{
if (string.IsNullOrEmpty(server))
{
throw new ArgumentNullException(nameof(server));
}
var types = GetTypesConsumer();
if (types == null || !types.Any())
{
throw new NotConfiguredException("No topic has been configured to consume");
}
var configurationsConsumers = new List <ConfigurationConsumer>();
foreach (var type in types)
{
var attribute = type.GetCustomAttribute <ConsumerKafkaAttribute>();
var configurationConsumer = new ConfigurationConsumer(server)
{
GroupId = attribute.GroupId,
TypeConsumer = type,
Topic = attribute.Topic
};
services.AddSingleton(configurationConsumer.TypeConsumer);
configurationsConsumers.Add(configurationConsumer);
}
services.AddSingleton(sp =>
{
return(new Consumer(configurationsConsumers, sp));
});
services.AddHostedService <ConsumerBackgroundService>();
return(services);
}
private IConsumerKafkaTopic GetService(ConfigurationConsumer configurationConsumers) => _serviceProvider.GetService(configurationConsumers.TypeConsumer) as IConsumerKafkaTopic;