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KumuluzEE OpenTracing provides support for distributed tracing using Jaeger, Zipkin, etc.
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README.md

KumuluzEE OpenTracing

Build Status

KumuluzEE OpenTracing extension provides OpenTracing instrumentation for JAX-RS. Extension is compliant with MicroProfile OpenTracing specification.

KumuluzEE OpenTracing extension provides MicroProfile compliant distributed tracing solution for KumuluzEE framework.

Usage

You can enable KumuluzEE OpenTracing extension by adding one of the following dependencies.

Jaeger tracing

<dependency>
    <groupId>com.kumuluz.ee.opentracing</groupId>
    <artifactId>kumuluzee-opentracing-jaeger</artifactId>
    <version>${kumuluzee-opentracing.version}</version>
</dependency>

Zipkin tracing

<dependency>
    <groupId>com.kumuluz.ee.opentracing</groupId>
    <artifactId>kumuluzee-opentracing-zipkin</artifactId>
    <version>${kumuluzee-opentracing.version}</version>
</dependency>

CDI, JAX-RS and Jetty servlet dependencies are prerequisites. Please refer to KumuluzEE readme for more information.

Configuration

Sample configuration file. For more information please refer to: Jaeger client docs, Zipkin client docs and MP-OT specification.

kumuluzee:
  opentracing:
    jaeger:
      service-name: KumuluzEE project # if not set kumuluzee.name value is used
      agent-host: localhost # default agent host
      agent-port: 5775 # default agent port
      endpoint: /api/traces
      auth-token: authToken
      username: username
      password: password
      reporter:
        log-spans: true
        max-queue-size: 10000
        flush-interval: 1000
      tags: key1=val1, key2=val2
      sampler: 
        type: const # default sampler type
        param: 1 # default sampler param
        manager-host-port: http://localhost:5775
      propagation: jaeger
      traceid-128bit: true
      
    zipkin:
      service-name: KumuluzEE project # if not set kumuluzee.name value is used
      agent-host: http://localhost # default agent host
      agent-port: 9411 # default agent port
      tags: key1=val1, key2=val2
      sampler:
        type: const # default sampler type
        param: 1 # default sampler param
      traceid-128bit: true

mp:
  opentracing:
    server:
      operation-name-provider: http-path
      skip-pattern: /openapi.*|/health.*

Tracing with no code instrumentation

Tracing is automatically enabled by adding KumuluzEE OpenTracing extension dependency.

Tracing with explicit code instrumentation

There is @Traced annotation available to define explicit Span creation. @Traced annotation can be added to class or method.
Tracing in JAX-RS resource classes is enabled by default. It can be disabled by adding @Traced(false) annotation to class or method.

Accessing configured tracer

The configured tracer object can be accessed by injecting Tracer class:

@Inject
io.opentracing.Tracer configuredTracer;

Tracing client requests

To enable JAX-RS client tracing, client filters should be added:

Client httpClient = ClientTracingRegistrar.configure(ClientBuilder.newBuilder()).build();

For more in-depth specification and configuration options please refer to MicroProfile-OpenTracing (MP-OT).

When using KumuluzEE Rest Client version 1.2.1 or above tracing is automatically enabled for all Rest Clients. To disable tracing add @Traced(false) annotation on interface or method.

Changelog

Recent changes can viewed on Github on the Releases Page.

Contribute

See the contributing docs.

When submitting an issue, please follow the guidelines.

When submitting a bugfix, write a test that exposes the bug and fails before applying your fix. Submit the test alongside the fix.

When submitting a new feature, add tests that cover the feature.

License

MIT

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