Java Serializer.configure方法代碼示例

import org.apache.kafka.common.serialization.Serializer; //導入方法依賴的package包/類
@Test
public void defaultSerdeShouldBeConfigured() {
    final Map<String, Object> serializerConfigs = new HashMap<>();
    serializerConfigs.put("key.serializer.encoding", "UTF8");
    serializerConfigs.put("value.serializer.encoding", "UTF-16");
    final Serializer<String> serializer = Serdes.String().serializer();

    final String str = "my string for testing";
    final String topic = "my topic";

    serializer.configure(serializerConfigs, true);
    assertEquals("Should get the original string after serialization and deserialization with the configured encoding",
            str, streamsConfig.defaultKeySerde().deserializer().deserialize(topic, serializer.serialize(topic, str)));

    serializer.configure(serializerConfigs, false);
    assertEquals("Should get the original string after serialization and deserialization with the configured encoding",
            str, streamsConfig.defaultValueSerde().deserializer().deserialize(topic, serializer.serialize(topic, str)));
}
 

import org.apache.kafka.common.serialization.Serializer; //導入方法依賴的package包/類
public static void main(String[] args) throws InterruptedException {

        Properties props = new Properties();
        props.put(APPLICATION_ID_CONFIG, "my-stream-processing-application");
        props.put(BOOTSTRAP_SERVERS_CONFIG, "localhost:9092");
        props.put("key.serializer", "org.apache.kafka.common.serialization.StringSerializer");
        props.put("key.deserializer", "org.apache.kafka.common.serialization.StringDeserializer");
        props.put("value.serializer", JsonPOJOSerializer.class.getName());
        props.put("value.deserializer", JsonPOJODeserializer.class.getName());

        Map<String, Object> serdeProps = new HashMap<>();
        serdeProps.put("JsonPOJOClass", Messung.class);

        final Serializer<Messung> serializer = new JsonPOJOSerializer<>();
        serializer.configure(serdeProps, false);

        final Deserializer<Messung> deserializer = new JsonPOJODeserializer<>();
        deserializer.configure(serdeProps, false);

        final Serde<Messung> serde = Serdes.serdeFrom(serializer, deserializer);

        StreamsConfig config = new StreamsConfig(props);

        KStreamBuilder builder = new KStreamBuilder();

        builder.stream(Serdes.String(), serde, "produktion")
                .filter( (k,v) -> v.type.equals("Biogas"))
                .to(Serdes.String(), serde,"produktion2");

        KafkaStreams streams = new KafkaStreams(builder, config);
        streams.start();
    }
 

import org.apache.kafka.common.serialization.Serializer; //導入方法依賴的package包/類
@SuppressWarnings("unchecked")
private LiKafkaProducerImpl(LiKafkaProducerConfig configs,
                           Serializer<K> keySerializer,
                           Serializer<V> valueSerializer,
                           Serializer<LargeMessageSegment> largeMessageSegmentSerializer,
                           Auditor<K, V> auditor) {
  // Instantiate the open source producer, which always sents raw bytes.
  _producer = new KafkaProducer<>(configs.originals(), new ByteArraySerializer(), new ByteArraySerializer());

  // Instantiate the key serializer if necessary.
  _keySerializer = keySerializer != null ? keySerializer :
      configs.getConfiguredInstance(ProducerConfig.KEY_SERIALIZER_CLASS_CONFIG, Serializer.class);
  _keySerializer.configure(configs.originals(), true);
  // Instantiate the key serializer if necessary.
  _valueSerializer = valueSerializer != null ? valueSerializer :
      configs.getConfiguredInstance(ProducerConfig.VALUE_SERIALIZER_CLASS_CONFIG, Serializer.class);
  _valueSerializer.configure(configs.originals(), false);

  // prepare to handle large messages.
  _largeMessageEnabled = configs.getBoolean(LiKafkaProducerConfig.LARGE_MESSAGE_ENABLED_CONFIG);
  _maxMessageSegmentSize = configs.getInt(LiKafkaProducerConfig.MAX_MESSAGE_SEGMENT_BYTES_CONFIG);
  Serializer<LargeMessageSegment> segmentSerializer = largeMessageSegmentSerializer != null ? largeMessageSegmentSerializer :
      configs.getConfiguredInstance(LiKafkaProducerConfig.SEGMENT_SERIALIZER_CLASS_CONFIG, Serializer.class);
  segmentSerializer.configure(configs.originals(), false);
  _messageSplitter = new MessageSplitterImpl(_maxMessageSegmentSize, segmentSerializer);

  // Instantiate auditor if necessary
  _auditor = auditor != null ? auditor :
      configs.getConfiguredInstance(LiKafkaProducerConfig.AUDITOR_CLASS_CONFIG, Auditor.class);
  _auditor.configure(configs.configsWithCurrentProducer(_producer));
  _auditor.start();
  _numThreadsInSend = new AtomicInteger(0);
  _closed = false;
}
 

import org.apache.kafka.common.serialization.Serializer; //導入方法依賴的package包/類
@Override
public Serde<GenericRow> getGenericRowSerde(Schema schema, KsqlConfig ksqlConfig,
                                            boolean isInternal,
                                            SchemaRegistryClient schemaRegistryClient) {
  Map<String, Object> serdeProps = new HashMap<>();
  serdeProps.put("JsonPOJOClass", GenericRow.class);

  final Serializer<GenericRow> genericRowSerializer = new KsqlJsonSerializer(schema);
  genericRowSerializer.configure(serdeProps, false);

  final Deserializer<GenericRow> genericRowDeserializer = new KsqlJsonDeserializer(schema);
  genericRowDeserializer.configure(serdeProps, false);

  return Serdes.serdeFrom(genericRowSerializer, genericRowDeserializer);
}
 

import org.apache.kafka.common.serialization.Serializer; //導入方法依賴的package包/類
@Override
public Serde<GenericRow> getGenericRowSerde(Schema schema, KsqlConfig ksqlConfig,
                                            boolean isInternal,
                                            SchemaRegistryClient schemaRegistryClient) {
  Map<String, Object> serdeProps = new HashMap<>();

  final Serializer<GenericRow> genericRowSerializer = new KsqlDelimitedSerializer(schema);
  genericRowSerializer.configure(serdeProps, false);

  final Deserializer<GenericRow> genericRowDeserializer = new KsqlDelimitedDeserializer(schema);
  genericRowDeserializer.configure(serdeProps, false);

  return Serdes.serdeFrom(genericRowSerializer, genericRowDeserializer);
}
 

import org.apache.kafka.common.serialization.Serializer; //導入方法依賴的package包/類
@SuppressWarnings("unchecked")
private LiKafkaProducerImpl(LiKafkaProducerConfig configs,
                           Serializer<K> keySerializer,
                           Serializer<V> valueSerializer,
                           Serializer<LargeMessageSegment> largeMessageSegmentSerializer,
                           Auditor<K, V> auditor) {
  // Instantiate the open source producer, which always sents raw bytes.
  _producer = new KafkaProducer<>(configs.originals(), new ByteArraySerializer(), new ByteArraySerializer());

  try {
    // Instantiate the key serializer if necessary.
    _keySerializer = keySerializer != null ? keySerializer
        : configs.getConfiguredInstance(ProducerConfig.KEY_SERIALIZER_CLASS_CONFIG, Serializer.class);
    _keySerializer.configure(configs.originals(), true);
    // Instantiate the key serializer if necessary.
    _valueSerializer = valueSerializer != null ? valueSerializer
        : configs.getConfiguredInstance(ProducerConfig.VALUE_SERIALIZER_CLASS_CONFIG, Serializer.class);
    _valueSerializer.configure(configs.originals(), false);

    // prepare to handle large messages.
    _largeMessageEnabled = configs.getBoolean(LiKafkaProducerConfig.LARGE_MESSAGE_ENABLED_CONFIG);
    _maxMessageSegmentSize = configs.getInt(LiKafkaProducerConfig.MAX_MESSAGE_SEGMENT_BYTES_CONFIG);
    Serializer<LargeMessageSegment> segmentSerializer = largeMessageSegmentSerializer != null ? largeMessageSegmentSerializer
        : configs.getConfiguredInstance(LiKafkaProducerConfig.SEGMENT_SERIALIZER_CLASS_CONFIG, Serializer.class);
    segmentSerializer.configure(configs.originals(), false);
    _uuidFactory = configs.getConfiguredInstance(LiKafkaProducerConfig.UUID_FACTORY_CLASS_CONFIG, UUIDFactory.class);
    _messageSplitter = new MessageSplitterImpl(_maxMessageSegmentSize, segmentSerializer, _uuidFactory);
    // Instantiate auditor if necessary
    if (auditor != null) {
      _auditor = auditor;
      _auditor.configure(configs.configsWithCurrentProducer(_producer));
    } else {
      _auditor = configs.getConfiguredInstance(LiKafkaProducerConfig.AUDITOR_CLASS_CONFIG, Auditor.class, _producer);
    }
    _auditor.start();
    _numThreadsInSend = new AtomicInteger(0);
    _closed = false;
  } catch (Exception e) {
    _producer.close();
    throw e;
  }
}
 

import org.apache.kafka.common.serialization.Serializer; //導入方法依賴的package包/類
private static <T> Serializer<T> getJsonSerializer(boolean isKey) {
  Serializer<T> result = new KafkaJsonSerializer<>();
  result.configure(Collections.emptyMap(), isKey);
  return result;
}