Daikon Prometheus

Daikon Prometheus is a library that add to Daikon the ability to expose metrics for Prometheus.

The main goals are:

• Expose useful metrics for Prometheus

How to add Daikon Prometheus to your project

Gradle

• Add JitPack in your root build.gradle at the end of repositories:

repositories {
    ...
    maven { url 'https://jitpack.io' }
}

• Add the dependency

implementation('com.github.DaikonWeb:daikon-prometheus:1.9.0')

Maven

• Add the JitPack repository to your build file

<repositories>
    <repository>
        <id>jitpack.io</id>
        <url>https://jitpack.io</url>
    </repository>
</repositories>

• Add the dependency

<dependency>
    <groupId>com.github.DaikonWeb</groupId>
    <artifactId>daikon-prometheus</artifactId>
    <version>1.9.0</version>
</dependency>

How to use

To publish metrics:

HttpServer()
    .prometheus("/prometheus")
    .start().use {
        assertThat(get("http://localhost:4545/prometheus").text).contains("jvm")
    }

To use a custom metric:

HttpServer()
    .prometheus("/prometheus")
    .get("/counter") { _, _, ctx ->
        ctx.meterRegistry().counter("calls").increment()
    }
    .start().use {
        get("http://localhost:4545/counter")
        get("http://localhost:4545/counter")
        assertThat(get("http://localhost:4545/foo").text).contains("calls_total 2.0")
    }

Resources

• Documentation: https://daikonweb.github.io
• Examples: https://github.com/DaikonWeb/daikon-examples
• Micrometer: https://micrometer.io/
• Prometheus: https://github.com/prometheus

Authors

• Daniele Fongo

License

This project is licensed under the Apache License 2.0 - see the LICENSE file for details