v0.14.0

Added

• Adding a dynamic dispatch to Aggregator Selector #497
• Add global::force_flush_tracer_provider #512
• Add config max_attributes_per_event and max_attributes_per_link #521
• Add dropped attribute counts to events and links #529

Changed

• Remove unnecessary clone in Key type #491
• Remove #[must_use] from set_tracer_provider #501
• Rename remaining usage of default_sampler to sampler #509
• Use current span for SDK-less context propagation #510
• Always export span batch when limit reached #519
• Rename message events to events #530
• Update resource merge behaviour #537
• Ignore links with invalid context #538

Removed

• Remove remote span context #508
• Remove metrics quantiles #525

Fixed

• Allow users to use custom export kind selector #526

Performance

• Improve simple span processor performance #502
• Local span perf improvements #505
• Reduce string allocations where possible #506

v0.13.0

Upgrade note: exporter pipelines do not return an uninstall guard as of #444, use opentelemetry::global::shutdown_tracer_provider explicitly instead.

Changed

• Pull configrations from environment variables by default when creating BatchSpanProcessor #445
• Convert doc links to intra-doc #466
• Switch to Cow for event names #471
• Use API to configure async runtime instead of features #481
• Rename trace config with_default_sampler to with_sampler #482

Removed

• Removed tracer provider guard #444
• Removed from_env and use environment variables to initialize the configurations by default #459

v0.12.0

Added

• Instrumentation library support #402
• Batch observer support #429
• with_unit methods in metrics #431

Changed

• Dependencies updates #410
• Add Send, Sync to AsyncInstrument in metrics #422
• Add Send, Sync to InstrumentCore in metrics #423
• Replace regex with custom logic #411
• Update tokio to v1 #421

Removed

• Moved http dependencies into a new opentelemetry-http crate #415
• Remove tonic dependency #414

v0.11.2

Fixed

• Fix possible deadlock when dropping metric instruments #407

v0.11.1

Fixed

• Fix remote implicit builder context sampling #405

v0.11.0

Added

• Add force_flush method to span processors #358
• Add timeout for force_flush and shutdown #362

Changed

• Implement Display trait for Key and Value types #353
• Remove Option from Array values #359
• Update ShouldSample's parent parameter to be Context #368
• Consolidate error types in trace module into TraceError #371
• Add #[must_use] to uninstall structs #372
• Move 3rd party propagators and merge exporter into sdk::export #375
• Add instrumentation version to instrument config #392
• Use instrumentation library in metrics #393
• start_from_context renamed to start_with_context #399
• Removed build_with_context as full context is now stored in builder #399
• SpanBuilder's with_parent renamed to with_parent_context #399

Fixed

• Fix parent based sampling in tracer #354
• StatusCode enum value ordering #377
• Counter adding the delta from last collection #395
• HistogramAggregator returning sum vs count #398

v0.10.0

Added

• Add support for baggage metadata #287

Changed

• Remove api prefix from modules #305
• Move mark_as_active_span and get_active_span functions into trace module #310
• Revert renaming of SpanContext to SpanReference #299
• Default trace propagator is now a no-op #329
• Return references to span contexts instead of clones #325
• Update exporter errors to be Box<dyn Error + Send + Sync + 'static> #284
• Rename GenericProvider to GenericTracerProvider #313
• Reduce SpanStatus enum to Ok, Error, and Unset variants #315
• update B3 propagator to more closely match spec #319
• Export missing pub global trace types #313
• Ensure kv array values are homogeneous #333
• Implement Display trait for Key and Value types #353
• Move SpanProcessor trait into sdk module #334
• Ensure is_recording is false and span is no-op after end #341
• Move binary propagator and base64 format to contrib #343
• Ensure metrics noop types go through constructors #345
• Change ExportResult to use std::result::Result #347
• Change SpanExporter::export to take &mut self instead of &self #350
• Add MSRV 1.42.0 #296

Fixed

• Fix parent based sampling #354

Removed

• Remove support for u64 and bytes kv values #323
• Remove kv value conversion from &str #332

v0.9.1

Added

• Allow metric instruments to be cloned #280

Fixed

• Fix single threaded runtime tokio feature bug #278

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