TLDR:
TraceAutoConfiguration
之后,我还需要一段自动配置才能运行@AutoConfigureAfter
,则应用程序无法启动并失败,并显示消息No qualifying bean of type 'zipkin2.reporter.Sender' available
更多详细信息:
我正在尝试创建一个自定义的Sleuth检测服务,该服务在没有可用跟踪时也可以工作。这是服务接口的真正简化版本:
public interface SomeService {
String decorate(String value);
}
然后我创建一个自动配置(因为此代码在许多项目中使用的单独模块中):
@Configuration
@AutoConfigureAfter(name = "org.springframework.cloud.sleuth.autoconfig.TraceAutoConfiguration")
@Slf4j
public class TestAutoConfiguration {
@ConditionalOnBean(type = "brave.Tracer")
@Configuration
public static class TracedConfiguration {
@Bean
public SomeService someService(Tracer tracer) {
log.info("Create traced SomeService");
return value -> value + " [" + tracer.currentSpan().toString() + "]";
}
}
@ConditionalOnMissingBean(type = "brave.Tracer")
@Configuration
public static class NoTracedConfiguration {
@Bean
public SomeService someService() {
log.info("Create not traced SomeService");
return value -> value + " [not-traced]";
}
}
}
的想法实际上是在没有Tracer时拥有一种Noop版本的服务。
然后我像往常一样在spring.factories文件中声明自动配置。
这是我要运行的应用程序:
@SpringBootApplication
@RestController
@Slf4j
public class ReproApplication {
@Autowired
private SomeService someService;
@GetMapping("/test")
public String test() {
log.info("Test Endpoint called, check TraceId/SpanId/ParentSpanId in log");
return someService.decorate("hello world") + "\n";
}
public static void main(String[] args) {
SpringApplication.run(ReproApplication.class, args);
}
}
为此,我想将Zipkin与KafkaSpanReporter一起使用。所以我的application.properties看起来像这样:
spring.application.name=repro
server.port=8080
spring.kafka.bootstrapServers=kafka:9092
spring.sleuth.sampler.probability=1.0
spring.zipkin.sender.type=kafka
logging.level.org.springframework.boot.autoconfigure=DEBUG
和我的(截断的)pom.xml像这样:
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-stream</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-stream-kafka</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-zipkin</artifactId>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>1.16.20</version>
</dependency>
</dependencies>
当我尝试运行此代码时,出现错误:
No qualifying bean of type 'zipkin2.reporter.Sender' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {}
如果查看配置报告,我会看到:
Parameter 2 of method reporter in org.springframework.cloud.sleuth.zipkin2.ZipkinAutoConfiguration required a bean of type 'zipkin2.reporter.Sender' that could not be found.
- Bean method 'kafkaSender' not loaded because @ConditionalOnBean (types: org.springframework.boot.autoconfigure.kafka.KafkaProperties; SearchStrategy: all) did not find any beans of type org.springframework.boot.autoconfigure.kafka.KafkaProperties
这很奇怪,因为@EnableConfigurationProperties(KafkaProperties.class)
上有一个KafkaAutoConfiguration
并且配置报告清楚地显示了:
KafkaAutoConfiguration matched:
- @ConditionalOnClass found required class 'org.springframework.kafka.core.KafkaTemplate'; @ConditionalOnMissingClass did not find unwanted class (OnClassCondition)
甚至更奇怪的是,如果我在自动配置中删除了@AutoConfigureAfter(name = "org.springframework.cloud.sleuth.autoconfig.TraceAutoConfiguration")
,该服务就可以正常启动=>但我得到了我的bean的NoTracedConfiguration
味道,所以Tracer
是可能尚未配置。
我该怎么做才能解决此问题?
答案 0 :(得分:0)
最后可以使用@AutoConfigureAfter
,@CondtionnalOnBean
删除@ConditionnalOnMissingBean
,@ConditionalOnClass
和@ConditionnalOnMissingClass
,并从{ {1}}。不太好,但至少可以正常工作。