v0.16.0

Changed

• Add default resource in TracerProvider #571
• Rename get_tracer to tracer #586
• Extract trace::noop module and update docs #587
• Add Hash impl for span context and allow spans to clone and export current state #592
• Enforce span status code's order #593
• Make SpanRef public #600
• Make SpanProcessor::on_start take a mutable span #601
• Renamed label to attribute to align with otel specification #609

Performance

• Small performance boost for Resource::get #579

v0.15.0

Added

• More resource detectors #573

Changed

• Expose the Error type to allow users to set custom error handlers #551
• Allow users to use different channels based on runtime in batch span processor #560
• Move Unit into metrics module #564
• Update trace flags to match spec #565

Fixed

• Fix debug loop, add notes for #[tokio::test] #552
• TraceState cannot insert new key-value pairs #567

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