This example is built as part of the client_java project.

./mvnw package

This should create the file ./examples/example-prometheus-properties/target/example-prometheus-properties.jar.

java -jar ./examples/example-prometheus-properties/target/example-prometheus-properties.jar

View the metrics on http://localhost:9401/metrics?name[]=request_duration_seconds&name[]=request_size_bytes.

The example has a prometheus.properties file in the classpath with a few examples of how to change settings at runtime.

There are multiple alternative ways to specify the location of the prometheus.properties file:

• Put it in the classpath, like in this example.
• Set the environment variable PROMETHEUS_CONFIG to the file location.
• Set the prometheus.config System property to the file location.