Question

我写了一个宁静的网络服务，Post发布了Kafka消息，Get消费来自Kafka主题。我硬编码了允许我连接到Kafka的属性。我想将它移动到src / main / resources

中的yaml文件

producer:
  bootstrap.servers: "localhost:9092"
  acks: "all"
  retries: 0
  batch.size: 16384
  linger.ms: 1
  buffer.memory: 33554432
  key.serializer: "org.apache.kafka.common.serialization.StringSerializer"
  value.serializer: "org.apache.kafka.common.serialization.StringSerializer"

然后我尝试在我的Kafka Producer Code

中得到这个

@Service
public class SonicRestKafkaProducer {
    @Value("${producer.bootstrap.servers}")
    String bootStrapServers;

public void buildProducer() {
        Properties props = new Properties();
        if (bootStrapServers == null) {System.out.println("bootStrapServers is null");}
        props.put("bootstrap.servers", bootStrapServers);

这导致空指针。

bootStrapServers is null
2016-02-15 17:09:14.941 ERROR 10846 --- [nio-8080-exec-1] o.a.c.c.C.[.[.[/].[dispatcherServlet]    : Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is java.lang.NullPointerException] with root cause

java.lang.NullPointerException: null
    at java.util.Hashtable.put(Hashtable.java:459) ~[na:1.8.0_31]
    at com.sonicdrivein.bdp.kafka.restproxy.kafka.api.SonicRestKafkaProducer.buildProducer(SonicRestKafkaProducer.java:59) ~[kafka-rest-proxy-0.1.0.jar!/:0.1.0]

我尝试过创建一个单独的类。我觉得这很简单，但我没有在文档中看到任何内容，或者在这里解释它。

在春季靴子中使用yaml

0 个答案: