internal Topic(SafeKafkaHandle kafkaHandle, Producer producer, string topic, TopicConfig config,
out LibRdKafka.PartitionerCallback partitionerDelegate)
{
// PartitionerDelegate is an out parameter as its reference must be kept outside of Topic
// it may be called after topic is GC, and it may be different for different topics
// so we can't simply make it static here
this.producer = producer;
config = config ?? new TopicConfig();
config["produce.offset.report"] = "true";
IntPtr configPtr = config.handle.Dup();
if (config.CustomPartitioner != null)
{
partitionerDelegate = (IntPtr rkt, IntPtr keydata, UIntPtr keylen, int partition_cnt,
IntPtr rkt_opaque, IntPtr msg_opaque) =>
{
byte[] key = null;
if (keydata != IntPtr.Zero)
{
key = new byte[(int)keylen];
Marshal.Copy(keydata, key, 0, (int)keylen);
}
return(config.CustomPartitioner(this, key, partition_cnt));
};
LibRdKafka.topic_conf_set_partitioner_cb(configPtr, partitionerDelegate);
}
else
{
partitionerDelegate = null;
}
handle = kafkaHandle.Topic(topic, configPtr);
}
internal Topic(SafeKafkaHandle kafkaHandle, Producer producer, string topic, TopicConfig config)
{
this.producer = producer;
config = config ?? new TopicConfig();
config["produce.offset.report"] = "true";
IntPtr configPtr = config.handle.Dup();
if (config.CustomPartitioner != null)
{
PartitionerDelegate = (IntPtr rkt, IntPtr keydata, UIntPtr keylen, int partition_cnt,
IntPtr rkt_opaque, IntPtr msg_opaque) =>
{
byte[] key = null;
if (keydata != IntPtr.Zero)
{
key = new byte[(int)keylen];
Marshal.Copy(keydata, key, 0, (int)keylen);
}
return(config.CustomPartitioner(this, key, partition_cnt));
};
LibRdKafka.topic_conf_set_partitioner_cb(configPtr, PartitionerDelegate);
}
handle = kafkaHandle.Topic(topic, configPtr);
}