public opcKafkaProducer(kafkaProducerConf conf, CachedSchemaRegistryClient schemaRegistry)
{
_conf = conf;
// setup the logger
log = LogManager.GetLogger(this.GetType().Name);
// instance the List of schemas
schemas = new opcSchemas();
// instace producer with Avro serializers
producer = new ProducerBuilder <string, GenericRecord>(_conf.getProducerConf())
//.SetKeySerializer(new AvroSerializer<string>(schemaRegistry))
.SetValueSerializer(new AvroSerializer <GenericRecord>(schemaRegistry))
.SetErrorHandler((_, e) => log.Error($"Error: {e.Reason}"))
.Build();
log.Info("Producer streaming to broker: " + _conf.BootstrapServers);
log.Info("Data stream on topic: " + _conf.opcSystemName);
}
public GenericRecord getGenericRecord(opcSchemas schemas)
{
var res = new GenericRecord(schemas.rpcResponse);
var error = new GenericRecord(schemas.rpcError);
if (result != null)
{
res.Add("result", result);
res.Add("error", null);
}
// if there is an error then overrides the result
if (error_code != -999 || error_message != null)
{
error.Add("message", error_message);
error.Add("code", error_code);
res.Add("error", error);
res.Add("result", null);
}
res.Add("id", id);
return(res);
}
public opcKafkaRPC(kafkaRPCConf conf, CachedSchemaRegistryClient schemaRegistry)
{
_conf = conf;
logger = LogManager.GetLogger(this.GetType().Name);
_schemas = new opcSchemas();
// Override default GroupID if name exist
if (conf.GroupId == "OPC")
{
conf.GroupId = conf.opcSystemName;
}
// build the consumer, and subscribe it to topic
_consumer = new ConsumerBuilder <String, GenericRecord>(conf.getConsumerConf())
.SetValueDeserializer(new AvroDeserializer <GenericRecord>(schemaRegistry).AsSyncOverAsync())
.SetErrorHandler((_, e) => logger.Error($"Error: {e.Reason}"))
.Build();
_consumer.Subscribe(conf.opcSystemName + "-request");
// build the producer for the responses
var producer_conf = new ProducerConfig()
{
BootstrapServers = conf.BootstrapServers,
LingerMs = 5 // low latency response
};
_producer = new ProducerBuilder <String, GenericRecord>(producer_conf)
.SetValueSerializer(new AvroSerializer <GenericRecord>(schemaRegistry))
.SetErrorHandler((_, e) => logger.Error($"Error: {e.Reason}"))
.Build();
if (_conf.enableKafkaRPC)
{
logger.Info("Connected to broker: " + _conf.BootstrapServers);
logger.Info("Request are to be made on topic: " + conf.opcSystemName + "-request");
logger.Info("Response will be on topic: " + _conf.opcSystemName + "-response");
}
}