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opentelemetry-go/CHANGELOG.md
Tyler Yahn 01b6452652
Update Changelog (#878) 
Include last merge for the release.
2020-06-26 14:56:48 -07:00

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# Changelog
All notable changes to this project will be documented in this file.
The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
This project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
## [Unreleased]
## [0.7.0] - 2020-06-26
This release implements the v0.5.0 version of the OpenTelemetry specification.
### Added
- The othttp instrumentation now includes default metrics. (#861)
- This CHANGELOG file to track all changes in the project going forward.
- Support for array type attributes. (#798)
- Apply transitive dependabot go.mod dependency updates as part of a new automatic Github workflow. (#844)
- Timestamps are now passed to exporters for each export. (#835)
- Add new `Accumulation` type to metric SDK to transport telemetry from `Accumulator`s to `Processor`s.
This replaces the prior `Record` `struct` use for this purpose. (#835)
- New dependabot integration to automate package upgrades. (#814)
- `Meter` and `Tracer` implementations accept instrumentation version version as an optional argument.
This instrumentation version is passed on to exporters. (#811) (#805) (#802)
- The OTLP exporter includes the instrumentation version in telemetry it exports. (#811)
- Environment variables for Jaeger exporter are supported. (#796)
- New `aggregation.Kind` in the export metric API. (#808)
- New example that uses OTLP and the collector. (#790)
- Handle errors in the span `SetName` during span initialization. (#791)
- Default service config to enable retries for retry-able failed requests in the OTLP exporter and an option to override this default. (#777)
- New `go.opentelemetry.io/otel/api/oterror` package to uniformly support error handling and definitions for the project. (#778)
- New `global` default implementation of the `go.opentelemetry.io/otel/api/oterror.Handler` interface to be used to handle errors prior to an user defined `Handler`.
There is also functionality for the user to register their `Handler` as well as a convenience function `Handle` to handle an error with this global `Handler`(#778)
- Options to specify propagators for httptrace and grpctrace instrumentation. (#784)
- The required `application/json` header for the Zipkin exporter is included in all exports. (#774)
- Integrate HTTP semantics helpers from the contrib repository into the `api/standard` package. #769
### Changed
- Rename `Integrator` to `Processor` in the metric SDK. (#863)
- Rename `AggregationSelector` to `AggregatorSelector`. (#859)
- Rename `SynchronizedCopy` to `SynchronizedMove`. (#858)
- Rename `simple` integrator to `basic` integrator. (#857)
- Merge otlp collector examples. (#841)
- Change the metric SDK to support cumulative, delta, and pass-through exporters directly.
With these changes, cumulative and delta specific exporters are able to request the correct kind of aggregation from the SDK. (#840)
- The `Aggregator.Checkpoint` API is renamed to `SynchronizedCopy` and adds an argument, a different `Aggregator` into which the copy is stored. (#812)
- The `export.Aggregator` contract is that `Update()` and `SynchronizedCopy()` are synchronized with each other.
All the aggregation interfaces (`Sum`, `LastValue`, ...) are not meant to be synchronized, as the caller is expected to synchronize aggregators at a higher level after the `Accumulator`.
Some of the `Aggregators` used unnecessary locking and that has been cleaned up. (#812)
- Use of `metric.Number` was replaced by `int64` now that we use `sync.Mutex` in the `MinMaxSumCount` and `Histogram` `Aggregators`. (#812)
- Replace `AlwaysParentSample` with `ParentSample(fallback)` to match the OpenTelemetry v0.5.0 specification. (#810)
- Rename `sdk/export/metric/aggregator` to `sdk/export/metric/aggregation`. #808
- Send configured headers with every request in the OTLP exporter, instead of just on connection creation. (#806)
- Update error handling for any one off error handlers, replacing, instead, with the `global.Handle` function. (#791)
- Rename `plugin` directory to `instrumentation` to match the OpenTelemetry specification. (#779)
- Makes the argument order to Histogram and DDSketch `New()` consistent. (#781)
### Removed
- `Uint64NumberKind` and related functions from the API. (#864)
- Context arguments from `Aggregator.Checkpoint` and `Integrator.Process` as they were unused. (#803)
- `SpanID` is no longer included in parameters for sampling decision to match the OpenTelemetry specification. (#775)
### Fixed
- Upgrade OTLP exporter to opentelemetry-proto matching the opentelemetry-collector v0.4.0 release. (#866)
- Allow changes to `go.sum` and `go.mod` when running dependabot tidy-up. (#871)
- Bump github.com/stretchr/testify from 1.4.0 to 1.6.1. (#824)
- Bump github.com/prometheus/client_golang from 1.7.0 to 1.7.1 in /exporters/metric/prometheus. (#867)
- Bump google.golang.org/grpc from 1.29.1 to 1.30.0 in /exporters/trace/jaeger. (#853)
- Bump google.golang.org/grpc from 1.29.1 to 1.30.0 in /exporters/trace/zipkin. (#854)
- Bumps github.com/golang/protobuf from 1.3.2 to 1.4.2 (#848)
- Bump github.com/stretchr/testify from 1.4.0 to 1.6.1 in /exporters/otlp (#817)
- Bump github.com/golangci/golangci-lint from 1.25.1 to 1.27.0 in /tools (#828)
- Bump github.com/prometheus/client_golang from 1.5.0 to 1.7.0 in /exporters/metric/prometheus (#838)
- Bump github.com/stretchr/testify from 1.4.0 to 1.6.1 in /exporters/trace/jaeger (#829)
- Bump github.com/benbjohnson/clock from 1.0.0 to 1.0.3 (#815)
- Bump github.com/stretchr/testify from 1.4.0 to 1.6.1 in /exporters/trace/zipkin (#823)
- Bump github.com/itchyny/gojq from 0.10.1 to 0.10.3 in /tools (#830)
- Bump github.com/stretchr/testify from 1.4.0 to 1.6.1 in /exporters/metric/prometheus (#822)
- Bump google.golang.org/grpc from 1.27.1 to 1.29.1 in /exporters/trace/zipkin (#820)
- Bump google.golang.org/grpc from 1.27.1 to 1.29.1 in /exporters/trace/jaeger (#831)
- Bump github.com/google/go-cmp from 0.4.0 to 0.5.0 (#836)
- Bump github.com/google/go-cmp from 0.4.0 to 0.5.0 in /exporters/trace/jaeger (#837)
- Bump github.com/google/go-cmp from 0.4.0 to 0.5.0 in /exporters/otlp (#839)
- Bump google.golang.org/api from 0.20.0 to 0.28.0 in /exporters/trace/jaeger (#843)
- Set span status from HTTP status code in the othttp instrumentation. (#832)
- Fixed typo in push controller comment. (#834)
- The `Aggregator` testing has been updated and cleaned. (#812)
- `metric.Number(0)` expressions are replaced by `0` where possible. (#812)
- Fixed `global` `handler_test.go` test failure. #804
- Fixed `BatchSpanProcessor.Shutdown` to wait until all spans are processed. (#766)
- Fixed OTLP example's accidental early close of exporter. (#807)
- Ensure zipkin exporter reads and closes response body. (#788)
- Update instrumentation to use `api/standard` keys instead of custom keys. (#782)
- Clean up tools and RELEASING documentation. (#762)
## [0.6.0] - 2020-05-21
### Added
- Support for `Resource`s in the prometheus exporter. (#757)
- New pull controller. (#751)
- New `UpDownSumObserver` instrument. (#750)
- OpenTelemetry collector demo. (#711)
- New `SumObserver` instrument. (#747)
- New `UpDownCounter` instrument. (#745)
- New timeout `Option` and configuration function `WithTimeout` to the push controller. (#742)
- New `api/standards` package to implement semantic conventions and standard key-value generation. (#731)
### Changed
- Rename `Register*` functions in the metric API to `New*` for all `Observer` instruments. (#761)
- Use `[]float64` for histogram boundaries, not `[]metric.Number`. (#758)
- Change OTLP example to use exporter as a trace `Syncer` instead of as an unneeded `Batcher`. (#756)
- Replace `WithResourceAttributes()` with `WithResource()` in the trace SDK. (#754)
- The prometheus exporter now uses the new pull controller. (#751)
- Rename `ScheduleDelayMillis` to `BatchTimeout` in the trace `BatchSpanProcessor`.(#752)
- Support use of synchronous instruments in asynchronous callbacks (#725)
- Move `Resource` from the `Export` method parameter into the metric export `Record`. (#739)
- Rename `Observer` instrument to `ValueObserver`. (#734)
- The push controller now has a method (`Provider()`) to return a `metric.Provider` instead of the old `Meter` method that acted as a `metric.Provider`. (#738)
- Replace `Measure` instrument by `ValueRecorder` instrument. (#732)
- Rename correlation context header from `"Correlation-Context"` to `"otcorrelations"` to match the OpenTelemetry specification. 727)
### Fixed
- Ensure gRPC `ClientStream` override methods do not panic in grpctrace package. (#755)
- Disable parts of `BatchSpanProcessor` test until a fix is found. (#743)
- Fix `string` case in `kv` `Infer` function. (#746)
- Fix panic in grpctrace client interceptors. (#740)
- Refactor the `api/metrics` push controller and add `CheckpointSet` synchronization. (#737)
- Rewrite span batch process queue batching logic. (#719)
- Remove the push controller named Meter map. (#738)
- Fix Histogram aggregator initial state (fix #735). (#736)
- Ensure golang alpine image is running `golang-1.14` for examples. (#733)
- Added test for grpctrace `UnaryInterceptorClient`. (#695)
- Rearrange `api/metric` code layout. (#724)
## [0.5.0] - 2020-05-13
### Added
- Batch `Observer` callback support. (#717)
- Alias `api` types to root package of project. (#696)
- Create basic `othttp.Transport` for simple client instrumentation. (#678)
- `SetAttribute(string, interface{})` to the trace API. (#674)
- Jaeger exporter option that allows user to specify custom http client. (#671)
- `Stringer` and `Infer` methods to `key`s. (#662)
### Changed
- Rename `NewKey` in the `kv` package to just `Key`. (#721)
- Move `core` and `key` to `kv` package. (#720)
- Make the metric API `Meter` a `struct` so the abstract `MeterImpl` can be passed and simplify implementation. (#709)
- Rename SDK `Batcher` to `Integrator` to match draft OpenTelemetry SDK specification. (#710)
- Rename SDK `Ungrouped` integrator to `simple.Integrator` to match draft OpenTelemetry SDK specification. (#710)
- Rename SDK `SDK` `struct` to `Accumulator` to match draft OpenTelemetry SDK specification. (#710)
- Move `Number` from `core` to `api/metric` package. (#706)
- Move `SpanContext` from `core` to `trace` package. (#692)
- Change traceparent header from `Traceparent` to `traceparent` to implement the W3C specification. (#681)
### Fixed
- Update tooling to run generators in all submodules. (#705)
- gRPC interceptor regexp to match methods without a service name. (#683)
- Use a `const` for padding 64-bit B3 trace IDs. (#701)
- Update `mockZipkin` listen address from `:0` to `127.0.0.1:0`. (#700)
- Left-pad 64-bit B3 trace IDs with zero. (#698)
- Propagate at least the first W3C tracestate header. (#694)
- Remove internal `StateLocker` implementation. (#688)
- Increase instance size CI system uses. (#690)
- Add a `key` benchmark and use reflection in `key.Infer()`. (#679)
- Fix internal `global` test by using `global.Meter` with `RecordBatch()`. (#680)
- Reimplement histogram using mutex instead of `StateLocker`. (#669)
- Switch `MinMaxSumCount` to a mutex lock implementation instead of `StateLocker`. (#667)
- Update documentation to not include any references to `WithKeys`. (#672)
- Correct misspelling. (#668)
- Fix clobbering of the span context if extraction fails. (#656)
- Bump `golangci-lint` and work around the corrupting bug. (#666) (#670)
## [0.4.3] - 2020-04-24
### Added
- `Dockerfile` and `docker-compose.yml` to run example code. (#635)
- New `grpctrace` package that provides gRPC client and server interceptors for both unary and stream connections. (#621)
- New `api/label` package, providing common label set implementation. (#651)
- Support for JSON marshaling of `Resources`. (#654)
- `TraceID` and `SpanID` implementations for `Stringer` interface. (#642)
- `RemoteAddrKey` in the othttp plugin to include the HTTP client address in top-level spans. (#627)
- `WithSpanFormatter` option to the othttp plugin. (#617)
- Updated README to include section for compatible libraries and include reference to the contrib repository. (#612)
- The prometheus exporter now supports exporting histograms. (#601)
- A `String` method to the `Resource` to return a hashable identifier for a now unique resource. (#613)
- An `Iter` method to the `Resource` to return an array `AttributeIterator`. (#613)
- An `Equal` method to the `Resource` test the equivalence of resources. (#613)
- An iterable structure (`AttributeIterator`) for `Resource` attributes.
### Changed
- zipkin export's `NewExporter` now requires a `serviceName` argument to ensure this needed values is provided. (#644)
- Pass `Resources` through the metrics export pipeline. (#659)
### Removed
- `WithKeys` option from the metric API. (#639)
### Fixed
- Use the `label.Set.Equivalent` value instead of an encoding in the batcher. (#658)
- Correct typo `trace.Exporter` to `trace.SpanSyncer` in comments. (#653)
- Use type names for return values in jaeger exporter. (#648)
- Increase the visibility of the `api/key` package by updating comments and fixing usages locally. (#650)
- `Checkpoint` only after `Update`; Keep records in the `sync.Map` longer. (#647)
- Do not cache `reflect.ValueOf()` in metric Labels. (#649)
- Batch metrics exported from the OTLP exporter based on `Resource` and labels. (#626)
- Add error wrapping to the prometheus exporter. (#631)
- Update the OTLP exporter batching of traces to use a unique `string` representation of an associated `Resource` as the batching key. (#623)
- Update OTLP `SpanData` transform to only include the `ParentSpanID` if one exists. (#614)
- Update `Resource` internal representation to uniquely and reliably identify resources. (#613)
- Check return value from `CheckpointSet.ForEach` in prometheus exporter. (#622)
- Ensure spans created by httptrace client tracer reflect operation structure. (#618)
- Create a new recorder rather than reuse when multiple observations in same epoch for asynchronous instruments. #610
- The default port the OTLP exporter uses to connect to the OpenTelemetry collector is updated to match the one the collector listens on by default. (#611)
## [0.4.2] - 2020-03-31
### Fixed
- Fix `pre_release.sh` to update version in `sdk/opentelemetry.go`. (#607)
- Fix time conversion from internal to OTLP in OTLP exporter. (#606)
## [0.4.1] - 2020-03-31
### Fixed
- Update `tag.sh` to create signed tags. (#604)
## [0.4.0] - 2020-03-30
### Added
- New API package `api/metric/registry` that exposes a `MeterImpl` wrapper for use by SDKs to generate unique instruments. (#580)
- Script to verify examples after a new release. (#579)
### Removed
- The dogstatsd exporter due to lack of support.
This additionally removes support for statsd. (#591)
- `LabelSet` from the metric API.
This is replaced by a `[]core.KeyValue` slice. (#595)
- `Labels` from the metric API's `Meter` interface. (#595)
### Changed
- The metric `export.Labels` became an interface which the SDK implements and the `export` package provides a simple, immutable implementation of this interface intended for testing purposes. (#574)
- Renamed `internal/metric.Meter` to `MeterImpl`. (#580)
- Renamed `api/global/internal.obsImpl` to `asyncImpl`. (#580)
### Fixed
- Corrected missing return in mock span. (#582)
- Update License header for all source files to match CNCF guidelines and include a test to ensure it is present. (#586) (#596)
- Update to v0.3.0 of the OTLP in the OTLP exporter. (#588)
- Update pre-release script to be compatible between GNU and BSD based systems. (#592)
- Add a `RecordBatch` benchmark. (#594)
- Moved span transforms of the OTLP exporter to the internal package. (#593)
- Build both go-1.13 and go-1.14 in circleci to test for all supported versions of Go. (#569)
- Removed unneeded allocation on empty labels in OLTP exporter. (#597)
- Update `BatchedSpanProcessor` to process the queue until no data but respect max batch size. (#599)
- Update project documentation godoc.org links to pkg.go.dev. (#602)
## [0.3.0] - 2020-03-21
This is a first official beta release, which provides almost fully complete metrics, tracing, and context propagation functionality.
There is still a possibility of breaking changes.
### Added
- Add `Observer` metric instrument. (#474)
- Add global `Propagators` functionality to enable deferred initialization for propagators registered before the first Meter SDK is installed. (#494)
- Simplified export setup pipeline for the jaeger exporter to match other exporters. (#459)
- The zipkin trace exporter. (#495)
- The OTLP exporter to export metric and trace telemetry to the OpenTelemetry collector. (#497) (#544) (#545)
- The `StatusMessage` field was add to the trace `Span`. (#524)
- Context propagation in OpenTracing bridge in terms of OpenTelemetry context propagation. (#525)
- The `Resource` type was added to the SDK. (#528)
- The global API now supports a `Tracer` and `Meter` function as shortcuts to getting a global `*Provider` and calling these methods directly. (#538)
- The metric API now defines a generic `MeterImpl` interface to support general purpose `Meter` construction.
Additionally, `SyncImpl` and `AsyncImpl` are added to support general purpose instrument construction. (#560)
- A metric `Kind` is added to represent the `MeasureKind`, `ObserverKind`, and `CounterKind`. (#560)
- Scripts to better automate the release process. (#576)
### Changed
- Default to to use `AlwaysSampler` instead of `ProbabilitySampler` to match OpenTelemetry specification. (#506)
- Renamed `AlwaysSampleSampler` to `AlwaysOnSampler` in the trace API. (#511)
- Renamed `NeverSampleSampler` to `AlwaysOffSampler` in the trace API. (#511)
- The `Status` field of the `Span` was changed to `StatusCode` to disambiguate with the added `StatusMessage`. (#524)
- Updated the trace `Sampler` interface conform to the OpenTelemetry specification. (#531)
- Rename metric API `Options` to `Config`. (#541)
- Rename metric `Counter` aggregator to be `Sum`. (#541)
- Unify metric options into `Option` from instrument specific options. (#541)
- The trace API's `TraceProvider` now support `Resource`s. (#545)
- Correct error in zipkin module name. (#548)
- The jaeger trace exporter now supports `Resource`s. (#551)
- Metric SDK now supports `Resource`s.
The `WithResource` option was added to configure a `Resource` on creation and the `Resource` method was added to the metric `Descriptor` to return the associated `Resource`. (#552)
- Replace `ErrNoLastValue` and `ErrEmptyDataSet` by `ErrNoData` in the metric SDK. (#557)
- The stdout trace exporter now supports `Resource`s. (#558)
- The metric `Descriptor` is now included at the API instead of the SDK. (#560)
- Replace `Ordered` with an iterator in `export.Labels`. (#567)
### Removed
- The vendor specific Stackdriver. It is now hosted on 3rd party vendor infrastructure. (#452)
- The `Unregister` method for metric observers as it is not in the OpenTelemetry specification. (#560)
- `GetDescriptor` from the metric SDK. (#575)
- The `Gauge` instrument from the metric API. (#537)
### Fixed
- Make histogram aggregator checkpoint consistent. (#438)
- Update README with import instructions and how to build and test. (#505)
- The default label encoding was updated to be unique. (#508)
- Use `NewRoot` in the othttp plugin for public endpoints. (#513)
- Fix data race in `BatchedSpanProcessor`. (#518)
- Skip test-386 for Mac OS 10.15.x (Catalina and upwards). #521
- Use a variable-size array to represent ordered labels in maps. (#523)
- Update the OTLP protobuf and update changed import path. (#532)
- Use `StateLocker` implementation in `MinMaxSumCount`. (#546)
- Eliminate goroutine leak in histogram stress test. (#547)
- Update OTLP exporter with latest protobuf. (#550)
- Add filters to the othttp plugin. (#556)
- Provide an implementation of the `Header*` filters that do not depend on Go 1.14. (#565)
- Encode labels once during checkpoint.
The checkpoint function is executed in a single thread so we can do the encoding lazily before passing the encoded version of labels to the exporter.
This is a cheap and quick way to avoid encoding the labels on every collection interval. (#572)
- Run coverage over all packages in `COVERAGE_MOD_DIR`. (#573)
## [0.2.3] - 2020-03-04
### Added
- `RecordError` method on `Span`s in the trace API to Simplify adding error events to spans. (#473)
- Configurable push frequency for exporters setup pipeline. (#504)
### Changed
- Rename the `exporter` directory to `exporters`.
The `go.opentelemetry.io/otel/exporter/trace/jaeger` package was mistakenly released with a `v1.0.0` tag instead of `v0.1.0`.
This resulted in all subsequent releases not becoming the default latest.
A consequence of this was that all `go get`s pulled in the incompatible `v0.1.0` release of that package when pulling in more recent packages from other otel packages.
Renaming the `exporter` directory to `exporters` fixes this issue by renaming the package and therefore clearing any existing dependency tags.
Consequentially, this action also renames *all* exporter packages. (#502)
### Removed
- The `CorrelationContextHeader` constant in the `correlation` package is no longer exported. (#503)
## [0.2.2] - 2020-02-27
### Added
- `HTTPSupplier` interface in the propagation API to specify methods to retrieve and store a single value for a key to be associated with a carrier. (#467)
- `HTTPExtractor` interface in the propagation API to extract information from an `HTTPSupplier` into a context. (#467)
- `HTTPInjector` interface in the propagation API to inject information into an `HTTPSupplier.` (#467)
- `Config` and configuring `Option` to the propagator API. (#467)
- `Propagators` interface in the propagation API to contain the set of injectors and extractors for all supported carrier formats. (#467)
- `HTTPPropagator` interface in the propagation API to inject and extract from an `HTTPSupplier.` (#467)
- `WithInjectors` and `WithExtractors` functions to the propagator API to configure injectors and extractors to use. (#467)
- `ExtractHTTP` and `InjectHTTP` functions to apply configured HTTP extractors and injectors to a passed context. (#467)
- Histogram aggregator. (#433)
- `DefaultPropagator` function and have it return `trace.TraceContext` as the default context propagator. (#456)
- `AlwaysParentSample` sampler to the trace API. (#455)
- `WithNewRoot` option function to the trace API to specify the created span should be considered a root span. (#451)
### Changed
- Renamed `WithMap` to `ContextWithMap` in the correlation package. (#481)
- Renamed `FromContext` to `MapFromContext` in the correlation package. (#481)
- Move correlation context propagation to correlation package. (#479)
- Do not default to putting remote span context into links. (#480)
- Propagators extrac
- `Tracer.WithSpan` updated to accept `StartOptions`. (#472)
- Renamed `MetricKind` to `Kind` to not stutter in the type usage. (#432)
- Renamed the `export` package to `metric` to match directory structure. (#432)
- Rename the `api/distributedcontext` package to `api/correlation`. (#444)
- Rename the `api/propagators` package to `api/propagation`. (#444)
- Move the propagators from the `propagators` package into the `trace` API package. (#444)
- Update `Float64Gauge`, `Int64Gauge`, `Float64Counter`, `Int64Counter`, `Float64Measure`, and `Int64Measure` metric methods to use value receivers instead of pointers. (#462)
- Moved all dependencies of tools package to a tools directory. (#466)
### Removed
- Binary propagators. (#467)
- NOOP propagator. (#467)
### Fixed
- Upgraded `github.com/golangci/golangci-lint` from `v1.21.0` to `v1.23.6` in `tools/`. (#492)
- Fix a possible nil-dereference crash (#478)
- Correct comments for `InstallNewPipeline` in the stdout exporter. (#483)
- Correct comments for `InstallNewPipeline` in the dogstatsd exporter. (#484)
- Correct comments for `InstallNewPipeline` in the prometheus exporter. (#482)
- Initialize `onError` based on `Config` in prometheus exporter. (#486)
- Correct module name in prometheus exporter README. (#475)
- Removed tracer name prefix from span names. (#430)
- Fix `aggregator_test.go` import package comment. (#431)
- Improved detail in stdout exporter. (#436)
- Fix a dependency issue (generate target should depend on stringer, not lint target) in Makefile. (#442)
- Reorders the Makefile targets within `precommit` target so we generate files and build the code before doing linting, so we can get much nicer errors about syntax errors from the compiler. (#442)
- Reword function documentation in gRPC plugin. (#446)
- Send the `span.kind` tag to Jaeger from the jaeger exporter. (#441)
- Fix `metadataSupplier` in the jaeger exporter to overwrite the header if existing instead of appending to it. (#441)
- Upgraded to Go 1.13 in CI. (#465)
- Correct opentelemetry.io URL in trace SDK documentation. (#464)
- Refactored reference counting logic in SDK determination of stale records. (#468)
- Add call to `runtime.Gosched` in instrument `acquireHandle` logic to not block the collector. (#469)
## [0.2.1.1] - 2020-01-13
### Fixed
- Use stateful batcher on Prometheus exporter fixing regresion introduced in #395. (#428)
## [0.2.1] - 2020-01-08
### Added
- Global meter forwarding implementation.
This enables deferred initialization for metric instruments registered before the first Meter SDK is installed. (#392)
- Global trace forwarding implementation.
This enables deferred initialization for tracers registered before the first Trace SDK is installed. (#406)
- Standardize export pipeline creation in all exporters. (#395)
- A testing, organization, and comments for 64-bit field alignment. (#418)
- Script to tag all modules in the project. (#414)
### Changed
- Renamed `propagation` package to `propagators`. (#362)
- Renamed `B3Propagator` propagator to `B3`. (#362)
- Renamed `TextFormatPropagator` propagator to `TextFormat`. (#362)
- Renamed `BinaryPropagator` propagator to `Binary`. (#362)
- Renamed `BinaryFormatPropagator` propagator to `BinaryFormat`. (#362)
- Renamed `NoopTextFormatPropagator` propagator to `NoopTextFormat`. (#362)
- Renamed `TraceContextPropagator` propagator to `TraceContext`. (#362)
- Renamed `SpanOption` to `StartOption` in the trace API. (#369)
- Renamed `StartOptions` to `StartConfig` in the trace API. (#369)
- Renamed `EndOptions` to `EndConfig` in the trace API. (#369)
- `Number` now has a pointer receiver for its methods. (#375)
- Renamed `CurrentSpan` to `SpanFromContext` in the trace API. (#379)
- Renamed `SetCurrentSpan` to `ContextWithSpan` in the trace API. (#379)
- Renamed `Message` in Event to `Name` in the trace API. (#389)
- Prometheus exporter no longer aggregates metrics, instead it only exports them. (#385)
- Renamed `HandleImpl` to `BoundInstrumentImpl` in the metric API. (#400)
- Renamed `Float64CounterHandle` to `Float64CounterBoundInstrument` in the metric API. (#400)
- Renamed `Int64CounterHandle` to `Int64CounterBoundInstrument` in the metric API. (#400)
- Renamed `Float64GaugeHandle` to `Float64GaugeBoundInstrument` in the metric API. (#400)
- Renamed `Int64GaugeHandle` to `Int64GaugeBoundInstrument` in the metric API. (#400)
- Renamed `Float64MeasureHandle` to `Float64MeasureBoundInstrument` in the metric API. (#400)
- Renamed `Int64MeasureHandle` to `Int64MeasureBoundInstrument` in the metric API. (#400)
- Renamed `Release` method for bound instruments in the metric API to `Unbind`. (#400)
- Renamed `AcquireHandle` method for bound instruments in the metric API to `Bind`. (#400)
- Renamed the `File` option in the stdout exporter to `Writer`. (#404)
- Renamed all `Options` to `Config` for all metric exports where this wasn't already the case.
### Fixed
- Aggregator import path corrected. (#421)
- Correct links in README. (#368)
- The README was updated to match latest code changes in its examples. (#374)
- Don't capitalize error statements. (#375)
- Fix ignored errors. (#375)
- Fix ambiguous variable naming. (#375)
- Removed unnecessary type casting. (#375)
- Use named parameters. (#375)
- Updated release schedule. (#378)
- Correct http-stackdriver example module name. (#394)
- Removed the `http.request` span in `httptrace` package. (#397)
- Add comments in the metrics SDK (#399)
- Initialize checkpoint when creating ddsketch aggregator to prevent panic when merging into a empty one. (#402) (#403)
- Add documentation of compatible exporters in the README. (#405)
- Typo fix. (#408)
- Simplify span check logic in SDK tracer implementation. (#419)
## [0.2.0] - 2019-12-03
### Added
- Unary gRPC tracing example. (#351)
- Prometheus exporter. (#334)
- Dogstatsd metrics exporter. (#326)
### Changed
- Rename `MaxSumCount` aggregation to `MinMaxSumCount` and add the `Min` interface for this aggregation. (#352)
- Rename `GetMeter` to `Meter`. (#357)
- Rename `HTTPTraceContextPropagator` to `TraceContextPropagator`. (#355)
- Rename `HTTPB3Propagator` to `B3Propagator`. (#355)
- Rename `HTTPTraceContextPropagator` to `TraceContextPropagator`. (#355)
- Move `/global` package to `/api/global`. (#356)
- Rename `GetTracer` to `Tracer`. (#347)
### Removed
- `SetAttribute` from the `Span` interface in the trace API. (#361)
- `AddLink` from the `Span` interface in the trace API. (#349)
- `Link` from the `Span` interface in the trace API. (#349)
### Fixed
- Exclude example directories from coverage report. (#365)
- Lint make target now implements automatic fixes with `golangci-lint` before a second run to report the remaining issues. (#360)
- Drop `GO111MODULE` environment variable in Makefile as Go 1.13 is the project specified minimum version and this is environment variable is not needed for that version of Go. (#359)
- Run the race checker for all test. (#354)
- Redundant commands in the Makefile are removed. (#354)
- Split the `generate` and `lint` targets of the Makefile. (#354)
- Renames `circle-ci` target to more generic `ci` in Makefile. (#354)
- Add example Prometheus binary to gitignore. (#358)
- Support negative numbers with the `MaxSumCount`. (#335)
- Resolve race conditions in `push_test.go` identified in #339. (#340)
- Use `/usr/bin/env bash` as a shebang in scripts rather than `/bin/bash`. (#336)
- Trace benchmark now tests both `AlwaysSample` and `NeverSample`.
Previously it was testing `AlwaysSample` twice. (#325)
- Trace benchmark now uses a `[]byte` for `TraceID` to fix failing test. (#325)
- Added a trace benchmark to test variadic functions in `setAttribute` vs `setAttributes` (#325)
- The `defaultkeys` batcher was only using the encoded label set as its map key while building a checkpoint.
This allowed distinct label sets through, but any metrics sharing a label set could be overwritten or merged incorrectly.
This was corrected. (#333)
## [0.1.2] - 2019-11-18
### Fixed
- Optimized the `simplelru` map for attributes to reduce the number of allocations. (#328)
- Removed unnecessary unslicing of parameters that are already a slice. (#324)
## [0.1.1] - 2019-11-18
This release contains a Metrics SDK with stdout exporter and supports basic aggregations such as counter, gauges, array, maxsumcount, and ddsketch.
### Added
- Metrics stdout export pipeline. (#265)
- Array aggregation for raw measure metrics. (#282)
- The core.Value now have a `MarshalJSON` method. (#281)
### Removed
- `WithService`, `WithResources`, and `WithComponent` methods of tracers. (#314)
- Prefix slash in `Tracer.Start()` for the Jaeger example. (#292)
### Changed
- Allocation in LabelSet construction to reduce GC overhead. (#318)
- `trace.WithAttributes` to append values instead of replacing (#315)
- Use a formula for tolerance in sampling tests. (#298)
- Move export types into trace and metric-specific sub-directories. (#289)
- `SpanKind` back to being based on an `int` type. (#288)
### Fixed
- URL to OpenTelemetry website in README. (#323)
- Name of othttp default tracer. (#321)
- `ExportSpans` for the stackdriver exporter now handles `nil` context. (#294)
- CI modules cache to correctly restore/save from/to the cache. (#316)
- Fix metric SDK race condition between `LoadOrStore` and the assignment `rec.recorder = i.meter.exporter.AggregatorFor(rec)`. (#293)
- README now reflects the new code structure introduced with these changes. (#291)
- Make the basic example work. (#279)
## [0.1.0] - 2019-11-04
This is the first release of open-telemetry go library.
It contains api and sdk for trace and meter.
### Added
- Initial OpenTelemetry trace and metric API prototypes.
- Initial OpenTelemetry trace, metric, and export SDK packages.
- A wireframe bridge to support compatibility with OpenTracing.
- Example code for a basic, http-stackdriver, http, jaeger, and named tracer setup.
- Exporters for Jaeger, Stackdriver, and stdout.
- Propagators for binary, B3, and trace-context protocols.
- Project information and guidelines in the form of a README and CONTRIBUTING.
- Tools to build the project and a Makefile to automate the process.
- Apache-2.0 license.
- CircleCI build CI manifest files.
- CODEOWNERS file to track owners of this project.
[Unreleased]: https://github.com/open-telemetry/opentelemetry-go/compare/v0.7.0...HEAD
[0.7.0]: https://github.com/open-telemetry/opentelemetry-go/releases/tag/v0.7.0
[0.6.0]: https://github.com/open-telemetry/opentelemetry-go/releases/tag/v0.6.0
[0.5.0]: https://github.com/open-telemetry/opentelemetry-go/releases/tag/v0.5.0
[0.4.3]: https://github.com/open-telemetry/opentelemetry-go/releases/tag/v0.4.3
[0.4.2]: https://github.com/open-telemetry/opentelemetry-go/releases/tag/v0.4.2
[0.4.1]: https://github.com/open-telemetry/opentelemetry-go/releases/tag/v0.4.1
[0.4.0]: https://github.com/open-telemetry/opentelemetry-go/releases/tag/v0.4.0
[0.3.0]: https://github.com/open-telemetry/opentelemetry-go/releases/tag/v0.3.0
[0.2.3]: https://github.com/open-telemetry/opentelemetry-go/releases/tag/v0.2.3
[0.2.2]: https://github.com/open-telemetry/opentelemetry-go/releases/tag/v0.2.2
[0.2.1.1]: https://github.com/open-telemetry/opentelemetry-go/releases/tag/v0.2.1.1
[0.2.1]: https://github.com/open-telemetry/opentelemetry-go/releases/tag/v0.2.1
[0.2.0]: https://github.com/open-telemetry/opentelemetry-go/releases/tag/v0.2.0
[0.1.2]: https://github.com/open-telemetry/opentelemetry-go/releases/tag/v0.1.2
[0.1.1]: https://github.com/open-telemetry/opentelemetry-go/releases/tag/v0.1.1
[0.1.0]: https://github.com/open-telemetry/opentelemetry-go/releases/tag/v0.1.0
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