OpenTelemetry - java

This release includes many breaking changes to the metrics SDK as we move towards marking its first stable release. Notably, if you configure metric Views or have written a custom metric exporter, many of the classes and methods will have been moved or renamed. There are still a few remaining cleanups targeted for the next release after which there should not be many. Thanks for bearing with us on this.

API

• New methods have been added to Context to propagate context for common Java 8 callback types
• AttributesBuilder.put now supports vararg versions for lists with AttributeKey
• Multiple metric async callbacks can be registered for the same instrument, and callbacks can be removed

SDK

• An issue with Android desugaring of the SDK has been worked around
• EXPERIMENTAL: Support for disabling resource keys with OTEL_EXPERIMENTAL_RESOURCE_DISABLED_KEYS
• Fixed handling of schemaUrl in Resource.toBuilder()
• BREAKING: Many changes to Data classes used during export
• BREAKING: Many view configuration methods have been removed

Metrics

• APIs deprecated in the previous release have been removed
• DEPRECATION: PrometheusCollector for exporting OpenTelemetry metrics with the prometheus client library has been deprecated
• EXPERIMENTAL: File-based configuration of views
• Prometheus exporter now supports JPMS modules

Logs

• DEPRECATION: LogData.getName has been deprecated for removal