How to use

org.apache.samza.system.kafka.KafkaSystemConsumer$KafkaConsumerMessageSink

constructor

/**
 * Create a KafkaSystemConsumer for the provided {@code systemName}
 * @param kafkaConsumer kafka Consumer object to be used by this system consumer
 * @param systemName system name for which we create the consumer
 * @param config application config
 * @param clientId clientId from the kafka consumer to be used in the KafkaConsumerProxy
 * @param metrics metrics for this KafkaSystemConsumer
 * @param clock system clock
 */
public KafkaSystemConsumer(Consumer<K, V> kafkaConsumer, String systemName, Config config, String clientId,
  KafkaSystemConsumerMetrics metrics, Clock clock) {
 super(metrics.registry(), clock, metrics.getClass().getName());
 this.kafkaConsumer = kafkaConsumer;
 this.clientId = clientId;
 this.systemName = systemName;
 this.config = config;
 this.metrics = metrics;
 fetchThresholdBytesEnabled = new KafkaConfig(config).isConsumerFetchThresholdBytesEnabled(systemName);
 // create a sink for passing the messages between the proxy and the consumer
 messageSink = new KafkaConsumerMessageSink();
 // Create the proxy to do the actual message reading.
 String metricName = String.format("%s-%s", systemName, clientId);
 proxy = new KafkaConsumerProxy(kafkaConsumer, systemName, clientId, messageSink, metrics, metricName);
 LOG.info("{}: Created KafkaConsumerProxy {} ", this, proxy);
}

/**
 * Create a KafkaSystemConsumer for the provided {@code systemName}
 * @param kafkaConsumer kafka Consumer object to be used by this system consumer
 * @param systemName system name for which we create the consumer
 * @param config application config
 * @param clientId clientId from the kafka consumer to be used in the KafkaConsumerProxy
 * @param metrics metrics for this KafkaSystemConsumer
 * @param clock system clock
 */
public KafkaSystemConsumer(Consumer<K, V> kafkaConsumer, String systemName, Config config, String clientId,
  KafkaSystemConsumerMetrics metrics, Clock clock) {
 super(metrics.registry(), clock, metrics.getClass().getName());
 this.kafkaConsumer = kafkaConsumer;
 this.clientId = clientId;
 this.systemName = systemName;
 this.config = config;
 this.metrics = metrics;
 fetchThresholdBytesEnabled = new KafkaConfig(config).isConsumerFetchThresholdBytesEnabled(systemName);
 // create a sink for passing the messages between the proxy and the consumer
 messageSink = new KafkaConsumerMessageSink();
 // Create the proxy to do the actual message reading.
 String metricName = String.format("%s-%s", systemName, clientId);
 proxy = new KafkaConsumerProxy(kafkaConsumer, systemName, clientId, messageSink, metrics, metricName);
 LOG.info("{}: Created KafkaConsumerProxy {} ", this, proxy);
}

/**
 * Create a KafkaSystemConsumer for the provided {@code systemName}
 * @param kafkaConsumer kafka Consumer object to be used by this system consumer
 * @param systemName system name for which we create the consumer
 * @param config application config
 * @param clientId clientId from the kafka consumer to be used in the KafkaConsumerProxy
 * @param metrics metrics for this KafkaSystemConsumer
 * @param clock system clock
 */
public KafkaSystemConsumer(Consumer<K, V> kafkaConsumer, String systemName, Config config, String clientId,
  KafkaSystemConsumerMetrics metrics, Clock clock) {
 super(metrics.registry(), clock, metrics.getClass().getName());
 this.kafkaConsumer = kafkaConsumer;
 this.clientId = clientId;
 this.systemName = systemName;
 this.config = config;
 this.metrics = metrics;
 fetchThresholdBytesEnabled = new KafkaConfig(config).isConsumerFetchThresholdBytesEnabled(systemName);
 // create a sink for passing the messages between the proxy and the consumer
 messageSink = new KafkaConsumerMessageSink();
 // Create the proxy to do the actual message reading.
 String metricName = String.format("%s-%s", systemName, clientId);
 proxy = new KafkaConsumerProxy(kafkaConsumer, systemName, clientId, messageSink, metrics, metricName);
 LOG.info("{}: Created KafkaConsumerProxy {} ", this, proxy);
}