Using Jaeger to trace an Apache Camel application

This example can be found in the “examples/camel-example-opentracing” folder. Follow the instructions in the readme to build and run the example as distributed with Camel. The example uses a simple logging tracer that outputs the distributed tracing (span) information to the console.

To change this example to use Jaeger there are two steps:

with the Jaeger java client:

Unlike the previous example, the JMS loan broker example has no OpenTracing support “out of the box”. This example can be found in the “examples/camel-example-loan-broker-jms” folder.

However in the case of this example we need to use the explicit programmatic approach. Follow these steps:

Note: in this example, the spans representing the messaging sends and receives are using “span.kind” tags of consumer and producer. These represent asynchronous messaging communications, whereas the client and server span kinds are generally used for RPC communications.

This article has shown how to quickly add OpenTracing instrumentation to some Camel examples and use Jaeger to store and visualise the trace instances.

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