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CamelContextStartedEvent调用了两次

spring-camel apache-camel spring-boot spring

Sydney · 技术社区 · 7 年前

这个 CamelContextStartedEvent 为同一个camel上下文(camel-1)调用两次。问题可能是我注册 EventNotifier 是的。可以使用Spring Initializer(带有Spring Boot 1.5.14、Spring Boot Camel Starter 2.21.1和Spring Boot Web Starter)重现此问题。

查看日志:

2018-07-06 11:04:41.104  INFO 19092 --- [           main] o.a.camel.spring.SpringCamelContext      : Apache Camel 2.21.1 (CamelContext: camel-1) is starting
2018-07-06 11:04:41.106  INFO 19092 --- [           main] o.a.c.m.ManagedManagementStrategy        : JMX is enabled
2018-07-06 11:04:41.191  INFO 19092 --- [           main] o.a.camel.spring.SpringCamelContext      : StreamCaching is not in use. If using streams then its recommended to enable stream caching. See more details at http://camel.apache.org/stream-caching.html
2018-07-06 11:04:41.193  INFO 19092 --- [           main] o.a.camel.spring.boot.RoutesCollector    : Starting CamelMainRunController to ensure the main thread keeps running
2018-07-06 11:04:41.193  INFO 19092 --- [           main] o.a.camel.spring.SpringCamelContext      : Total 0 routes, of which 0 are started
2018-07-06 11:04:41.194  INFO 19092 --- [           main] o.a.camel.spring.SpringCamelContext      : Apache Camel 2.21.1 (CamelContext: camel-1) started in 0.090 seconds
2018-07-06 11:04:41.195  INFO 19092 --- [           main] c.e.bug.service.StartupEventNotifier     : CamelContextStartedEvent for SpringCamelContext(camel-1) with spring id application:11223
2018-07-06 11:04:41.195  INFO 19092 --- [           main] c.e.bug.service.StartupEventNotifier     : CamelContextStartedEvent for SpringCamelContext(camel-1) with spring id application:11223
2018-07-06 11:04:41.216  INFO 19092 --- [           main] s.b.c.e.t.TomcatEmbeddedServletContainer : Tomcat started on port(s): 11223 (http)
2018-07-06 11:04:41.221  INFO 19092 --- [           main] com.example.bug.BugApplication           : Started BugApplication in 4.684 seconds (JVM running for 6.773)

初始化 事件通知程序 以下内容:

@Service
public class SchedulerService {

    private final CamelContext camelContext;

    private final StartupEventNotifier startupEventNotifier;

    public SchedulerService(CamelContext camelContext, StartupEventNotifier startupEventNotifier) {
        this.camelContext = camelContext;
        this.startupEventNotifier = startupEventNotifier;
    }

    @PostConstruct
    public void init() {
        camelContext.getManagementStrategy().addEventNotifier(startupEventNotifier);
    }

}

这个 事件通知程序 以下内容:

@Component
public class StartupEventNotifier extends EventNotifierSupport {

    private static final Logger logger = LoggerFactory.getLogger(StartupEventNotifier.class);

    @Override
    public void notify(EventObject event) throws Exception {
        if (event instanceof CamelContextStartedEvent) {
            logger.info("CamelContextStartedEvent for {}", event.getSource());
        }
    }

    @Override
    public boolean isEnabled(EventObject event) {
        if (event instanceof CamelContextStartedEvent) {
            return true;
        }
        return false;
    }
}

应用程序.yml:

camel:
  springboot:
    main-run-controller: true
server:
  port: 11223

1 回复 | 直到 7 年前

Bedla 7 年前

它叫两次,因为它注册了两次。一次是你,一次是阿帕奇骆驼。 EventNotifier 自动注册,如果在 Registry 是的。自从你 StartupEventNotifier 注释为 Component ,它是 登记处 ApacheCamel在 CamelContext 启动 (你可以从中看到 CamelAutoConfiguration 424号线) 是的。

你有四个选择:

从中删除自定义注册 SchedulerService 是的。
删除 @Component 注释来自 StartupEventNotifier启动事件通知程序 并向注册 camelContext.getManagementStrategy().addEventNotifier(new StartupEventNotifier())

在您的 计划服务 是的。类似于:

if (!context.getManagementStrategy().getEventNotifiers().contains(startupEventNotifier)){
    context.getManagementStrategy().addEventNotifier(startupEventNotifier);
}

寄存器 事件通知程序 在里面 @PostConstruct 属于 RouteBuilder .它将在启动自动发现之前注册,然后在中跳过 骆驼自动配置 (见第422行)