/// <summary>
/// Initializes a new instance of the <see cref="KafkaProducerEndpoint" /> class.
/// </summary>
/// <param name="nameResolverType">
/// The type of the <see cref="IKafkaProducerEndpointNameResolver" /> to be used to resolve the actual
/// endpoint name.
/// </param>
/// <param name="clientConfig">
/// The <see cref="KafkaClientConfig" /> to be used to initialize the
/// <see cref="KafkaProducerConfig" />.
/// </param>
public KafkaProducerEndpoint(Type nameResolverType, KafkaClientConfig?clientConfig = null)
: base(nameResolverType)
{
Configuration = new KafkaProducerConfig(clientConfig);
if (!typeof(IKafkaProducerEndpointNameResolver).IsAssignableFrom(nameResolverType))
{
throw new ArgumentException(
"The specified type must implement IKafkaProducerEndpointNameResolver.",
nameof(nameResolverType));
}
_partitionFunction = (envelope, serviceProvider) =>
((IKafkaProducerEndpointNameResolver)serviceProvider.GetRequiredService(nameResolverType))
.GetPartition(envelope) ?? Partition.Any;
}
/// <summary>
/// Initializes a new instance of the <see cref="KafkaProducerEndpoint" /> class.
/// </summary>
/// <param name="nameFunction">
/// The function returning the endpoint name for the message being produced.
/// </param>
/// <param name="partitionFunction">
/// The optional function returning the target partition index for the message being produced. If <c>null</c>
/// the partition is automatically derived from the message key (use <see cref="KafkaKeyMemberAttribute" />
/// to specify a message key, otherwise a random one will be generated).
/// </param>
/// <param name="clientConfig">
/// The <see cref="KafkaClientConfig" /> to be used to initialize the
/// <see cref="KafkaProducerConfig" />.
/// </param>
public KafkaProducerEndpoint(
Func <IOutboundEnvelope, string> nameFunction,
Func <IOutboundEnvelope, int>?partitionFunction,
KafkaClientConfig?clientConfig = null)
: base(nameFunction)
{
Configuration = new KafkaProducerConfig(clientConfig);
if (partitionFunction != null)
{
_partitionFunction = (envelope, _) => partitionFunction.Invoke(envelope);
}
else
{
_partitionFunction = AnyPartitionFunction;
}
}
/// <summary>
/// Initializes a new instance of the <see cref="KafkaProducerEndpoint" /> class.
/// </summary>
/// <param name="name">
/// The name of the topic.
/// </param>
/// <param name="partition">
/// The optional partition index. If <c>null</c> the partition is automatically derived from the message
/// key (use <see cref="KafkaKeyMemberAttribute" /> to specify a message key, otherwise a random one will be
/// generated).
/// </param>
/// <param name="clientConfig">
/// The <see cref="KafkaClientConfig" /> to be used to initialize the
/// <see cref="KafkaProducerConfig" />.
/// </param>
public KafkaProducerEndpoint(
string name,
int?partition,
KafkaClientConfig?clientConfig = null)
: base(name)
{
if (partition != null && partition < Partition.Any)
{
throw new ArgumentOutOfRangeException(
nameof(partition),
"The partition index must be greater or equal to 0, or Partition.Any (-1).");
}
Configuration = new KafkaProducerConfig(clientConfig);
if (partition != null)
{
_partitionFunction = (_, _) => partition.Value;
}
else
{
_partitionFunction = AnyPartitionFunction;
}
}
