* PoC of embedded private method ifaces
* Rename embed to embedded
* Add an embedded iface for all instruments
* Fix metric/instrument tests
* Fix global and otel
* Fix SDK
* Comment the embedded pkg types
* Update the embedded pkg docs
* Update otel/metric docs about impls
* Update otel/metric type docs on impl
* Update docs in otel/metric/instrument on default
* Add changes to changelog
* Apply suggestions from code review
Co-authored-by: Robert Pająk <pellared@hotmail.com>
* Apply feedback on URLs
* Reword based on feedback
* Make it clear we only recommended embedding noop
* Ignore links with godot linter
---------
Co-authored-by: Robert Pająk <pellared@hotmail.com>
* Replace Unit from metric/unit with string
Deprecate the units package. This package will not be included in the
metric GA.
* Add changes to changelog
* Update RegisterCallback and Callback decls
RegisterCallback accept variadic Asynchronous instruments instead of a
slice.
Callback accept an observation result recorder to ensure instruments
that are observed by a callback.
* Update global impl
* Update noop impl
* Update SDK impl
* Fix prometheus example
* Fix metric API example_test
* Remove unused registerabler
* Rename ObservationRecorder to MultiObserver
* Update Callback documentation about MultiObserver
* Remove the Observe method from async inst
* Revert to iface for Observers
* Fix async inst docs
* Update global async delegate race test
* Restore removed observe doc
* Remove TODO
* Remove stale comment
* Update changelog
* Split metric inst config
Instead of having the same configuration for both the Synchronous and
Asynchronous instruments, use specific options for both.
* Use Async/Sync opt for appropriate inst
* Update noop inst providers
* Update internal global impl
* Update sdk
* Remove unused method for callbackOption
* Test instrument configuration
* Lint imports
* Add changes to changelog
* Refactor callbacks and further split opts
Define callbacks to return the value observed. Because of the different
types returned for different observables, the callbacks and options are
move to the sync/async packages.
* Update noop impl
* Fix example_test.go
* Fix internal impl
* Update Callbacks
Return observations for distinct attr sets.
* Refactor common code in sdk/metric inst provider
* Update examples and prom exporter
* Generalize callback
* Update changelog
* Add unit tests for callback
* Add meter tests for cbacks on creation
* Rename Observations to Measurements
* Update Callback to accept an Observer
* Update SDK impl
* Move conf to instrument pkg
* Apply suggestions from code review
