### **3.1.3 使用 Java 配置**
*****
您可以使用 Java 中的 Spring Configuration 完成與上一個示例中相同的工作。 以下示例顯示了如何執行此操作：
~~~
@Autowired
private Listener listener;
@Autowired
private KafkaTemplate<Integer, String> template;
@Test
public void testSimple() throws Exception {
template.send("annotated1", 0, "foo");
template.flush();
assertTrue(this.listener.latch1.await(10, TimeUnit.SECONDS));
}
@Configuration
@EnableKafka
public class Config {
@Bean
ConcurrentKafkaListenerContainerFactory<Integer, String>
kafkaListenerContainerFactory() {
ConcurrentKafkaListenerContainerFactory<Integer, String> factory =
new ConcurrentKafkaListenerContainerFactory<>();
factory.setConsumerFactory(consumerFactory());
return factory;
}
@Bean
public ConsumerFactory<Integer, String> consumerFactory() {
return new DefaultKafkaConsumerFactory<>(consumerConfigs());
}
@Bean
public Map<String, Object> consumerConfigs() {
Map<String, Object> props = new HashMap<>();
props.put(ConsumerConfig.BOOTSTRAP_SERVERS_CONFIG, embeddedKafka.getBrokersAsString());
...
return props;
}
@Bean
public Listener listener() {
return new Listener();
}
@Bean
public ProducerFactory<Integer, String> producerFactory() {
return new DefaultKafkaProducerFactory<>(producerConfigs());
}
@Bean
public Map<String, Object> producerConfigs() {
Map<String, Object> props = new HashMap<>();
props.put(ProducerConfig.BOOTSTRAP_SERVERS_CONFIG, embeddedKafka.getBrokersAsString());
...
return props;
}
@Bean
public KafkaTemplate<Integer, String> kafkaTemplate() {
return new KafkaTemplate<Integer, String>(producerFactory());
}
}
~~~
~~~
public class Listener {
private final CountDownLatch latch1 = new CountDownLatch(1);
@KafkaListener(id = "foo", topics = "annotated1")
public void listen1(String foo) {
this.latch1.countDown();
}
}
~~~
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