Examples with Deserializer org.apache.kafka.common.serialization.Deserializer used on opensource projects

Example 6 with Deserializer

use of org.apache.kafka.common.serialization.Deserializer in project druid by druid-io.

the class KafkaRecordSupplier method getKafkaDeserializer.

private static Deserializer getKafkaDeserializer(Properties properties, String kafkaConfigKey) {
    Deserializer deserializerObject;
    try {
        Class deserializerClass = Class.forName(properties.getProperty(kafkaConfigKey, ByteArrayDeserializer.class.getTypeName()));
        Method deserializerMethod = deserializerClass.getMethod("deserialize", String.class, byte[].class);
        Type deserializerReturnType = deserializerMethod.getGenericReturnType();
        if (deserializerReturnType == byte[].class) {
            deserializerObject = (Deserializer) deserializerClass.getConstructor().newInstance();
        } else {
            throw new IllegalArgumentException("Kafka deserializers must return a byte array (byte[]), " + deserializerClass.getName() + " returns " + deserializerReturnType.getTypeName());
        }
    } catch (ClassNotFoundException | NoSuchMethodException | InstantiationException | IllegalAccessException | InvocationTargetException e) {
        throw new StreamException(e);
    }
    return deserializerObject;
}

Example 7 with Deserializer

use of org.apache.kafka.common.serialization.Deserializer in project ksql by confluentinc.

the class RecordFormatter method newProtobufDeserializer.

private static Deserializer<?> newProtobufDeserializer(final SchemaRegistryClient srClient) {
    final Printer printer = TextFormat.printer();
    final KafkaProtobufDeserializer<?> inner = new KafkaProtobufDeserializer<>(srClient);
    return (topic, data) -> {
        final Message msg = inner.deserialize(topic, data);
        if (msg == null) {
            return null;
        }
        return printer.shortDebugString(msg);
    };
}

Example 8 with Deserializer

use of org.apache.kafka.common.serialization.Deserializer in project ksql by confluentinc.

the class RecordFormatter method newStringDeserializer.

private static Deserializer<?> newStringDeserializer() {
    final StringDeserializer deserializer = new StringDeserializer();
    final String replacement = UTF_8.newDecoder().replacement();
    return (Deserializer<Object>) (topic, data) -> {
        if (data.length == 0) {
            throw new DeserializationException("Empty data");
        }
        final String text = deserializer.deserialize("", data);
        if (text.contains(replacement)) {
            throw new DeserializationException("String contains replacement char");
        }
        return text;
    };
}