代码之家 › 专栏 › 技术社区 › tryingHard

云侦探从Springboot 1.5改为2.x

spring-cloud-sleuth javabeans cloud spring-boot spring

tryingHard · 技术社区 · 7 年前

早些时候,这段代码运行良好:

@Component
@RequiredArgsConstructor(onConstructor = @__(@Autowired))
class CustomTraceableExecutorServiceImpl implements ExecutorServiceProvider {

    @Qualifier(value = "defaultExecutorService")
    private final ExecutorService executorService;
    @Qualifier(value = "scheduledTimeoutExecutorService")
    private final ScheduledExecutorService scheduledExecutorService;
    private final Tracer tracer;
    private final SpanNamer spanNamer;

    @Override
    public ExecutorService get() {
        return new TraceableExecutorService(executorService, tracer, new TraceKeys(), spanNamer);
    }

    @Override
    public ScheduledExecutorService getScheduled() {
        return new TraceableScheduledExecutorService(scheduledExecutorService, tracer, new TraceKeys(), spanNamer);
    }
}

但现在 TraceableExecutorService 构造函数接受 TraceableExecutorService(BeanFactory beanFactory, final ExecutorService delegate) 所以我需要把代码改成:

@Component
@RequiredArgsConstructor(onConstructor = @__(@Autowired))
class CustomTraceableExecutorServiceImpl implements ExecutorServiceProvider {

    @Qualifier(value = "defaultExecutorService")
    private final ExecutorService executorService;
    @Qualifier(value = "scheduledTimeoutExecutorService")
    private final ScheduledExecutorService scheduledExecutorService;
    //@Qualifier(value = "defaultBeanFactory")
    @Autowired
    private final BeanFactory beanFactory;
    //@Qualifier(value = "scheduledBeanFactory")
    @Autowired
    private final BeanFactory scheduledBeanFactory;

    @Override
    public ExecutorService get() {
        return new TraceableExecutorService(beanFactory, executorService);
    }

    @Override
    public ScheduledExecutorService getScheduled() {
        return new TraceableScheduledExecutorService(scheduledBeanFactory, scheduledExecutorService);
    }
}

我的问题是 BeanFactory 我不知道怎么创造它? 我没有 xml 我可以用的文件。

我在这里读到: what are the different ways of creating beanfactory object? 我们可以创造这个 豆制品厂 通过:

1. BeanFactory fac=new ClassPathXmlApplicationContext("Spring-Config.xml"); 

2. Resource res=new Classpathresource("Spring-Config.xml");
    BeanFactory fac=new XmlBeanFactory(res);

如果我没有任何 XML 文件?我只希望我的代码与旧版本(springboot 1.5版本)兼容。

1 回复 | 直到 7 年前

Marcin Grzejszczak 7 年前

春天创造 BeanFactory 为你。如果您使用的是spring上下文,那么您可以将其从框中取出。但是,如果出于某种原因,您没有使用spring,而是使用了sleuth(我不知道您为什么要这样做),您可以检查我们是否使用 豆制品厂 找回豆子。 豆制品厂 是一个接口,所以您可以做的是重写 getBean 方法来检索此类bean,如:

Tracing tracing() {
        if (this.tracing == null && this.beanFactory != null) {
            this.tracing = this.beanFactory.getBean(Tracing.class);
        }
        return this.tracing;
    }

    SpanNamer spanNamer() {
        if (this.spanNamer == null && this.beanFactory != null) {
            this.spanNamer = this.beanFactory.getBean(SpanNamer.class);
        }
        return this.spanNamer;
    }

你需要嘲笑 豆制品厂 返回 this.beanFactory.getBean(Tracing.class) 和 this.beanFactory.getBean(SpanNamer.class)

但是只要使用spring,你就可以把所有东西都从盒子里拿出来。坦白说,我真的不明白你在做什么。