v1.37.0

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NOTICE: This release contains a significant restructuring of the experimental event API and the API incubator artifact. Please read the notes in the API -> Incubator section carefully.

API

• Promote Span#addLink to stable API
  (#​6317)

Incubator

• BREAKING: Rename opentelemetry-extension-incubator to opentelemetry-api-incubator,
  merge opentelemetry-api-events into opentelemetry-api-incubator.
  (#​6289)
• BREAKING: Remove domain from event api. EventEmitterProvider#setEventDomain has been removed.
  The event.name field should now be namespaced to avoid collisions.
  See Semantic Conventions for Event Attributes
  for more details.
  (#​6253)
• BREAKING: Rename EventEmitter and related classes to EventLogger.
  (#​6316)
• BREAKING: Refactor Event API to reflect spec changes. Restructure API to put fields in
  the AnyValue log record body. Add setters for timestamp, context, and severity. Set default
  severity to INFO=9.
  (#​6318)

SDK

• Add get{Signal}Exporter methods to Simple{Signal}Processor, Batch{Signal}Processor.
  (#​6078)

Metrics

• Use synchronized instead of reentrant lock in explicit bucket histogram
  (#​6309)

Exporters

• Fix typo in OTLP javadoc
  (#​6311)
• Add PrometheusHttpServer#toBuilder()
  (#​6333)
• Bugfix: Use getPrometheusName for Otel2PrometheusConverter map keys to avoid metric name
  conflicts
  (#​6308)

Extensions

• Add Metric exporter REUSABLE_DATA memory mode configuration options, including autoconfigure
  support via env var OTEL_JAVA_EXPERIMENTAL_EXPORTER_MEMORY_MODE=REUSABLE_DATA.
  (#​6304)
• Add autoconfigure console alias for logging exporter
  (#​6027)
• Update jaeger autoconfigure docs to point to OTLP
  (#​6307)
• Add ServiceInstanceIdResourceProvider implementation for generating service.instance.id UUID
  if not already provided by user. Included in opentelemetry-sdk-extension-incubator.
  (#​6226)
• Add GCP resource detector to list of resource providers in autoconfigure docs
  (#​6336)

Tooling

• Check for Java 17 toolchain and fail if not found
  (#​6303)