v0.9.0

Added

• Add resource detector #174
• Add fields method to TextMapFormat #178
• Add support for tracestate in TraceContextPropagator #191
• Propagate valid span context in noop tracer #197
• Add end_with_timestamp method for trace span #199
• Add ID methods for hex and byte array formatting #200
• Add AWS X-Ray ID Generator #201
• AWS X-Ray Trace Context Propagator #202
• Add instrumentation library information to spans #207
• Add keys method to extractors #209
• Add TraceState to SpanContext #217
• Add from_env config option for BatchSpanProcessor #228
• Add pipeline uninstall mechanism to shut down trace pipelines #229

Changed

• Re-write metrics sdk to be spec compliant #179
• Rename Sampler::Probability to Sampler::TraceIdRatioBased #188
• Rename HTTPTextPropagator to TextMapPropagator #192
• Ensure extractors are case insensitive #193
• Rename Provider to TracerProvider #206
• Rename CorrelationContext into Baggage #208
• Pipeline builder for stdout trace exporter #224
• Switch to async exporters #232
• Allow ShouldSample implementation to modify trace state #237
• Ensure context guard is !Send #239
• Ensure trace noop structs use new constructor #240
• Switch to w3c baggage header #246
• Move trace module imports from api to api::trace #255
• Update tonic feature to use version 0.3.x #258
• Update exporters to receive owned span data #264
• Move propagators to sdk::propagation #266
• Rename SpanContext to SpanReference #270
• Rename SamplingDecision's NotRecord, Record and RecordAndSampled to
  Drop RecordOnly and RecordAndSample #247

v0.8.0

Added

• Add custom span processors to Provider::Builder #166

Changed

• Separate Carrier into Injector and Extractor #164
• Change the default sampler to be ParentOrElse(AlwaysOn) #163
• Move the Sampler interface to the SDK #169

v0.7.0

Added

• New ParentOrElse sampler for fallback logic if parent is not sampled. #128
• Attributes can now have array values #146
• Added record_exception and record_exception_with_stacktrace methods to Span #152

Changed

• Update sampler types #128
  • Always is now AlwaysOn. Never is now AlwaysOff. Probability now ignores parent
    sampled state.
• base64 and binary_propagator have been moved to experimental module. #134
• Correlation-Context header has been updated to otcorrelations #145
• B3Propagator has been updated to more closely follow the spec #148

v0.6.0

Added

• Add http and tonic features to impl Carrier for common types.

Changed

• Removed span_id from sampling parameters when implementing custom samplers.

Fixed

• Make Context Send + Sync in #127

v0.5.0

Added

• Derive Clone for B3Propagator, SamplingResult, and SpanBuilder
• Ability to configure the span id / trace id generator
• impl From<T> for common Key and Value types
• Add global tracer method
• Add Resource API
• Add Context API
• Add Correlations API
• Add HttpTextCompositePropagator for composing HttpTextPropagators
• Add GlobalPropagator for globally configuring a propagator
• Add TraceContextExt to provide methods for working with trace data in a context
• Expose EvictedQueue constructor

Changed

• Ensure that impls of Span are Send and Sync when used in global
• Changed Key and Value method signatures to remove Cow references
• Tracer's start now uses the implicit current context instead of an explicit span context.
  start_with_context may be used to specify a context if desired.
• with_span now accepts a span for naming consistency and managing the active state of a more
  complex span (likely produced by a builder), and the previous functionality that accepts a
  &str has been renamed to in_span, both of which now yield a context to the provided closure.
• Tracer's get_active_span now accepts a closure
• The Instrument trait has been renamed to FutureExt to avoid clashing with metric instruments,
  and instead accepts contexts via with_context.
• Span's get_context method has been renamed to span_context to avoid ambiguity.
• HttpTextPropagators inject the current context instead of an explicit span context. The context
  can be specified with inject_context.
• SpanData's context has been renamed to span_context

Fixed

• Update the probability sampler to match the spec
• Rename Traceparent header to traceparent

Removed

• TracerGenerics methods have been folded in to the Tracer trait so it is longer needed
• Tracer's mark_span_as_inactive has been removed
• Exporters no longer require an as_any method
• Span's mark_as_active, mark_as_inactive, and as_any have been removed

v0.4.0

Added

• New async batch span processor
• New stdout exporter
• Add trace_id to SpanBuilder

Changed

• Add attributes to Events.
• Update Span's add_event and add_event_with_timestamp to accept attributes.
• Record log fields in jaeger exporter
• Properly export span kind in jaeger exporter
• Add support for Links
• Add status_message to Span and SpanData
• Rename SpanStatus to StatusCode
• Update EvictedQueue internals from LIFO to FIFO
• Switch span attributes to EvictedHashMap

Fixed

• Call shutdown correctly when span processors and exporters are dropped

v0.3.0

Added

• New Base64 propagator
• New SpanBuilder api
• Zipkin Exporter crate

Changed

• Switch to SpanId and TraceId from u64 and u128
• Remove &mut self requirements for Span API

Fixed

• circular Tracer debug impl

v0.2.0

Added

• Make trace and metrics features optional
• ExportResult as specified in the specification
• Add Futures compatibility API
• Added serde serialise support to SpanData
• Separate OpenTelemetry Jaeger crate

Changed

• Rename HttpTraceContextPropagator to TraceContextPropagator
• Rename HttpB3Propagator to B3Propagator
• Switch to Apache 2 license
• Resolve agent addresses to allow non-static IP
• Remove tracer name prefix from span name

Removed

• Remove add_link from spans