如何使用 Apache Camel OpenTracing 组件更改跨度的操作名称？

Question

我成功添加了 Apache Camel 的 OpenTracing component to my application. I can see traces in Jaeger UI. But the traces for the RabbitMQ 组件，仅显示交换名称，没有路由键作为操作名称。由于我的应用程序只使用一个具有不同路由键的交换，我需要在我的跟踪中看到路由键作为操作名称。

研究

与OpenTracing Spring RabbitMQ I could expose another customized RabbitMqSpanDecorator, see Span decorator:

Note: you can customize your spans by declaring an overridden RabbitMqSpanDecorator bean.

（但是，我根本无法用 RabbitMqSpanDecorator 更改操作名称，因为操作名称被硬编码为 producer 或 consumer。）

不幸的是，Apache Camel 使用自己不同的 RabbitmqSpanDecorator 实现来修饰 span。我通过覆盖 Apache Camel 的 RabbitmqSpanDecorator 编写了一个自定义 class，但是我的自定义 class 没有被使用。

问题

如何更改 Apache Camel RabbitMQ 组件的 Apache Camel OpenTracing 组件的操作名称？

Answer 1

可以使用 ServiceLoader 更改 Tracer 实现，请参阅 OpenTracing:

EXPLICIT

Include the camel-opentracing component in your POM, along with any specific dependencies associated with the chosen OpenTracing compliant Tracer.

To explicitly configure OpenTracing support, instantiate the OpenTracingTracer and initialize the camel context. You can optionally specify a Tracer, or alternatively it can be implicitly discovered using the Registry or ServiceLoader.

使用 DefaultTracer 也可以将 RabbitmqSpanDecorator 更改为 ServiceLoader，参见 Tracer.java:

static {
    ServiceLoader.load(SpanDecorator.class).forEach(d -> {
        SpanDecorator existing = DECORATORS.get(d.getComponent());
        // Add span decorator if no existing decorator for the component,
        // or if derived from the existing decorator's class, allowing
        // custom decorators to be added if they extend the standard
        // decorators
        if (existing == null || existing.getClass().isInstance(d)) {
            DECORATORS.put(d.getComponent(), d);
        }
    });
}

因此，我必须添加一个文件 org.apache.camel.tracing.SpanDecorator，其中包含我的自定义名称 RabbitmqSpanDecorator，请参阅 ServiceLoader:

Deploying service providers on the class path

A service provider that is packaged as a JAR file for the class path is identified by placing a provider-configuration file in the resource directory META-INF/services. The name of the provider-configuration file is the fully qualified binary name of the service. The provider-configuration file contains a list of fully qualified binary names of service providers, one per line.

我的习惯RabbitmqSpanDecorator:

public class CustomRabbitmqSpanDecorator extends RabbitmqSpanDecorator {

  @Override
  public String getOperationName(Exchange exchange, Endpoint endpoint) {

    return ((RabbitMQEndpoint) endpoint).getRoutingKey();
  }
}

如何使用 Apache Camel OpenTracing 组件更改跨度的操作名称？

How to change the operation name of a span with Apache Camel OpenTracing component?

apache-camel

rabbitmq

opentracing

jaeger