How to use org.apache.samza.system.kafka

@Override
public StreamSpec copyWithPartitionCount(int partitionCount) {
 return new KafkaStreamSpec(getId(), getPhysicalName(), getSystemName(), partitionCount, getReplicationFactor(),
   getProperties());
}

/**
 * Make a copy of the spec with new properties
 * @param properties properties of the Kafka stream
 * @return new instance of {@link KafkaStreamSpec}
 */
public KafkaStreamSpec copyWithProperties(Properties properties) {
 return new KafkaStreamSpec(getId(), getPhysicalName(), getSystemName(), getPartitionCount(), getReplicationFactor(),
   properties);
}

 public Properties getProperties() {
  return mapToProperties(getConfig());
 }
}

public KafkaStreamSpec copyWithReplicationFactor(int replicationFactor) {
 return new KafkaStreamSpec(getId(), getPhysicalName(), getSystemName(), getPartitionCount(), replicationFactor,
   getProperties());
}

@Override
public boolean createStream(StreamSpec streamSpec) {
 LOG.info("Creating Kafka topic: {} on system: {}", streamSpec.getPhysicalName(), streamSpec.getSystemName());
 return KafkaSystemAdminUtilsScala.createStream(toKafkaSpec(streamSpec), getZkConnection());
}

/**
 * Delete records up to (and including) the provided ssp offsets for
 * all system stream partitions specified in the map.
 * This only works with Kafka cluster 0.11 or later. Otherwise it's a no-op.
 * @param offsets specifies up to what offsets the messages should be deleted
 */
@Override
public void deleteMessages(Map<SystemStreamPartition, String> offsets) {
 if (deleteCommittedMessages) {
  if (adminClientForDelete == null) {
   adminClientForDelete = kafka.admin.AdminClient.create(createAdminClientProperties());
  }
  KafkaSystemAdminUtilsScala.deleteMessages(adminClientForDelete, offsets);
  deleteMessageCalled = true;
 }
}

@Override
public void close(long timeout, TimeUnit timeUnit) {
 closed = true;
 // The real producer will flush messages as part of closing. We'll invoke flush here to approximate that behavior.
 new FlushRunnable(0).run();
}

@Test
public void testConfigValidations() {
 final KafkaSystemConsumer consumer = createConsumer(FETCH_THRESHOLD_MSGS, FETCH_THRESHOLD_BYTES);
 consumer.start();
 // should be no failures
}

@Test(expected = StreamValidationException.class)
public void testValidateStreamDoesNotExist() {
 StreamSpec spec = new StreamSpec("testId", "testStreamNameExist", "testSystem", 8);
 systemAdmin().validateStream(spec);
}

@Override
public Future<RecordMetadata> send(ProducerRecord record) {
 return send(record, null);
}

@Override
public void close() {
 close(Long.MAX_VALUE, TimeUnit.MILLISECONDS);
}

@Override
public StreamSpec copyWithPartitionCount(int partitionCount) {
 return new KafkaStreamSpec(getId(), getPhysicalName(), getSystemName(), partitionCount, getReplicationFactor(),
   getProperties());
}

/**
 * Make a copy of the spec with new properties
 * @param properties properties of the Kafka stream
 * @return new instance of {@link KafkaStreamSpec}
 */
public KafkaStreamSpec copyWithProperties(Properties properties) {
 return new KafkaStreamSpec(getId(), getPhysicalName(), getSystemName(), getPartitionCount(), getReplicationFactor(),
   properties);
}

public KafkaStreamSpec copyWithReplicationFactor(int replicationFactor) {
 return new KafkaStreamSpec(getId(), getPhysicalName(), getSystemName(), getPartitionCount(), replicationFactor,
   getProperties());
}

 public Properties getProperties() {
  return mapToProperties(getConfig());
 }
}

public synchronized void flush () {
 new FlushRunnable(0).run();
}

@Override
public StreamSpec copyWithPartitionCount(int partitionCount) {
 return new KafkaStreamSpec(getId(), getPhysicalName(), getSystemName(), partitionCount, getReplicationFactor(),
   getProperties());
}

/**
 * Make a copy of the spec with new properties
 * @param properties properties of the Kafka stream
 * @return new instance of {@link KafkaStreamSpec}
 */
public KafkaStreamSpec copyWithProperties(Properties properties) {
 return new KafkaStreamSpec(getId(), getPhysicalName(), getSystemName(), getPartitionCount(), getReplicationFactor(),
   properties);
}

public KafkaStreamSpec copyWithReplicationFactor(int replicationFactor) {
 return new KafkaStreamSpec(getId(), getPhysicalName(), getSystemName(), getPartitionCount(), replicationFactor,
   getProperties());
}

 public Properties getProperties() {
  return mapToProperties(getConfig());
 }
}