OpenTelemetry Java

Project Status

See OpenTelemetry Instrumentation for Java.

Getting Started

If you are looking for an all-in-one, easy-to-install auto-instrumentation javaagent, see opentelemetry-java-instrumentation.

If you are looking for examples on how to use the OpenTelemetry API to write your own manual instrumentation, or how to set up the OpenTelemetry Java SDK, see Manual instrumentation. Fully-functional examples are available in opentelemetry-java-docs.

For a general overview of OpenTelemetry, visit opentelemetry.io.

Would you like to get involved with the project? Read our contributing guide. We welcome contributions!

Contacting us

We hold regular meetings. See details at community page.

We use GitHub Discussions for support or general questions. Feel free to drop us a line.

We are also present in the #otel-java channel in the CNCF slack. Please join us for more informal discussions.

Overview

OpenTelemetry is the merging of OpenCensus and OpenTracing into a single project.

This project contains the following top level components:

OpenTelemetry API:
- stable apis including Tracer, Span, SpanContext, Meter, and Baggage
- semantic conventions Generated code for the OpenTelemetry semantic conventions.
- context api The OpenTelemetry Context implementation.
extensions define additional API extensions, which are not part of the core API.
sdk defines the implementation of the OpenTelemetry API.
sdk-extensions defines additional SDK extensions, which are not part of the core SDK.
OpenTracing shim defines a bridge layer from OpenTracing to the OpenTelemetry API.
OpenCensus shim defines a bridge layer from OpenCensus to the OpenTelemetry API.

This project publishes a lot of artifacts, listed in releases. opentelemetry-bom (BOM = Bill of Materials) is provided to assist with synchronizing versions of dependencies. opentelemetry-bom-alpha provides the same function for unstable artifacts. See published releases for instructions on using the BOMs.

We would love to hear from the larger community: please provide feedback proactively.

Requirements

Unless otherwise noted, all published artifacts support Java 8 or higher.

Android Disclaimer: For compatibility reasons, library desugaring must be enabled.

See CONTRIBUTING.md for additional instructions for building this project for development.

Note about extensions

Both API and SDK extensions consist of various additional components which are excluded from the core artifacts to keep them from growing too large.

We still aim to provide the same level of quality and guarantee for them as for the core components. Please don't hesitate to use them if you find them useful.

Project setup and contributing

Please refer to the contribution guide on how to set up for development and contribute!

Published Releases

Published releases are available on maven central. We strongly recommend using our published BOM to keep all dependency versions in sync.

Maven

<project>
  <dependencyManagement>
    <dependencies>
      <dependency>
        <groupId>io.opentelemetry</groupId>
        <artifactId>opentelemetry-bom</artifactId>
        <version>1.28.0</version>
        <type>pom</type>
        <scope>import</scope>
      </dependency>
    </dependencies>
  </dependencyManagement>
  <dependencies>
    <dependency>
      <groupId>io.opentelemetry</groupId>
      <artifactId>opentelemetry-api</artifactId>
    </dependency>
  </dependencies>
</project>

Gradle

dependencies {
  implementation platform("io.opentelemetry:opentelemetry-bom:1.28.0")
  implementation('io.opentelemetry:opentelemetry-api')
}

Note that if you want to use any artifacts that have not fully stabilized yet (such as the semantic conventions constants, then you will need to add an entry for the Alpha BOM as well, e.g.

dependencies {
  implementation platform("io.opentelemetry:opentelemetry-bom:1.28.0")
  implementation platform('io.opentelemetry:opentelemetry-bom-alpha:1.28.0-alpha')

  implementation('io.opentelemetry:opentelemetry-api')
  implementation('io.opentelemetry:opentelemetry-semconv')
  implementation('io.opentelemetry:opentelemetry-sdk-extension-autoconfigure')
}

Snapshots

Snapshots based out the main branch are available for opentelemetry-api, opentelemetry-sdk and the rest of the artifacts. We strongly recommend using our published BOM to keep all dependency versions in sync.

Maven

<project>
  <repositories>
    <repository>
      <id>oss.sonatype.org-snapshot</id>
      <url>https://oss.sonatype.org/content/repositories/snapshots</url>
    </repository>
  </repositories>
  <dependencyManagement>
    <dependencies>
      <dependency>
        <groupId>io.opentelemetry</groupId>
        <artifactId>opentelemetry-bom</artifactId>
        <version>1.29.0-SNAPSHOT</version>
        <type>pom</type>
        <scope>import</scope>
      </dependency>
    </dependencies>
  </dependencyManagement>
  <dependencies>
    <dependency>
      <groupId>io.opentelemetry</groupId>
      <artifactId>opentelemetry-api</artifactId>
    </dependency>
  </dependencies>
</project>

Gradle

repositories {
    maven { url 'https://oss.sonatype.org/content/repositories/snapshots' }
}

dependencies {
  implementation platform("io.opentelemetry:opentelemetry-bom:1.29.0-SNAPSHOT")
  implementation('io.opentelemetry:opentelemetry-api')
}

Libraries will usually only need opentelemetry-api, while applications will want to use the opentelemetry-sdk module which contains our standard implementation of the APIs.

Gradle composite builds

For opentelemetry-java developers that need to test the latest source code with another project, composite builds can be used as an alternative to publishToMavenLocal. This requires some setup which is explained here.

Releases

See the VERSIONING.md document for our policies for releases and compatibility guarantees.

Check out information about the latest release.

See the project milestones for details on upcoming releases. The dates and features described in issues and milestones are estimates, and subject to change.

The following tables describe the artifacts published by this project. To take a dependency, follow the instructions in Published Released to include the BOM, and specify the dependency as follows, replacing {{artifact-id}} with the value from the "Artifact ID" column:

<dependency>
  <groupId>io.opentelemetry</groupId>
  <artifactId>{{artifact-id}}</artifactId>
</dependency>

  implementation('io.opentelemetry:{{artifact-id}}')

Bill of Material

Component	Description	Artifact ID	Version	Javadoc
Bill of Materials (BOM)	Bill of materials for stable artifacts	`opentelemetry-bom`	1.28.0	N/A
Alpha Bill of Materials (BOM)	Bill of materials for alpha artifacts	`opentelemetry-bom-alpha`	1.28.0-alpha	N/A

API

Component	Description	Artifact ID	Version
API	OpenTelemetry API, including metrics, traces, baggage, context	`opentelemetry-api`	1.28.0
Events API	OpenTelemetry Event API for emitting events.	`opentelemetry-api-events`	1.28.0-alpha
Context API	OpenTelemetry context API	`opentelemetry-context`	1.28.0
Semantic Conventions	Generated code for OpenTelemetry semantic conventions	`opentelemetry-semconv`	1.28.0-alpha

API Extensions

Component	Description	Artifact ID	Version
Kotlin Extension	Context extension for coroutines	`opentelemetry-extension-kotlin`	1.28.0
Trace Propagators Extension	Trace propagators, including B3, Jaeger, OT Trace	`opentelemetry-extension-trace-propagators`	1.28.0
Incubator Extension	API incubator, including pass through propagator, and extended tracer	`opentelemetry-extension-incubator`	1.28.0-alpha

SDK

Component	Description	Artifact ID	Version
SDK	OpenTelemetry SDK, including metrics, traces, and logs	`opentelemetry-sdk`	1.28.0
Metrics SDK	OpenTelemetry metrics SDK	`opentelemetry-sdk-metrics`	1.28.0
Trace SDK	OpenTelemetry trace SDK	`opentelemetry-sdk-trace`	1.28.0
Log SDK	OpenTelemetry log SDK	`opentelemetry-sdk-logs`	1.28.0
SDK Common	Shared SDK components	`opentelemetry-sdk-common`	1.28.0
SDK Testing	Components for testing OpenTelemetry instrumentation	`opentelemetry-sdk-testing`	1.28.0

SDK Exporters

Component	Description	Artifact ID	Version
OTLP Exporters	OTLP gRPC & HTTP exporters, including traces, metrics, and logs	`opentelemetry-exporter-otlp`	1.28.0
OTLP Common	Shared OTLP components (internal)	`opentelemetry-exporter-otlp-common`	1.28.0
Jaeger gRPC Exporter	Jaeger gRPC trace exporter (deprecated [1])	`opentelemetry-exporter-jaeger`	1.28.0
Jaeger Thrift Exporter	Jaeger thrift trace exporter (deprecated [1])	`opentelemetry-exporter-jaeger-thift`	1.28.0
Logging Exporter	Logging exporters, including metrics, traces, and logs	`opentelemetry-exporter-logging`	1.28.0
Zipkin Exporter	Zipkin trace exporter	`opentelemetry-exporter-zipkin`	1.28.0
Prometheus Exporter	Prometheus metric exporter	`opentelemetry-exporter-prometheus`	1.28.0-alpha
Exporter Common	Shared exporter components (internal)	`opentelemetry-exporter-common`	1.28.0
OkHttp Sender	OkHttp implementation of HttpSender (internal)	`opentelemetry-exporter-sender-okhttp`	1.28.0
JDK Sender	Java 11+ native HttpClient implementation of HttpSender (internal)	`opentelemetry-exporter-sender-jdk`	1.28.0-alpha

[1]: Jaeger now has native support for OTLP and jaeger exporters are now deprecated. opentelemetry-exporter-jaeger-thrift will continue to be published until 1.34.0 (January 2024) but no new PRs will be accepted except security related bugfixes. After 1.34.0, io.opentelemetry:opentelemetry-bom will reference the last published version, but no additional versions will be published.

SDK Extensions

Component	Description	Artifact ID	Version
SDK Autoconfigure	Autoconfigure OpenTelemetry SDK from env vars, system properties, and SPI	`opentelemetry-sdk-extension-autoconfigure`	1.28.0
SDK Autoconfigure SPI	Service Provider Interface (SPI) definitions for autoconfigure	`opentelemetry-sdk-extension-autoconfigure-spi`	1.28.0
SDK Jaeger Remote Sampler Extension	Sampler which obtains sampling configuration from remote Jaeger server	`opentelemetry-sdk-extension-jaeger-remote-sampler`	1.28.0
SDK Incubator	SDK incubator, including YAML based view configuration, LeakDetectingSpanProcessor	`opentelemetry-sdk-extension-incubator`	1.28.0-alpha

Shims

Component	Description	Artifact ID	Version	Javadoc
OpenCensus Shim	Bridge opencensus metrics into the OpenTelemetry metrics SDK	`opentelemetry-opencensus-shim`	1.28.0-alpha
OpenTracing Shim	Bridge opentracing spans into the OpenTelemetry trace API	`opentelemetry-opentracing-shim`	1.28.0