We previously used string in the codebase to represent component type
(as it is known to factories and referred to in the config).
Now we have configmodels.Type alias that provides stronger compile-time
type checks.
This is a breaking change for components but fixing the components is easy.
Resolves: https://github.com/open-telemetry/opentelemetry-collector/issues/762
As we are preparing for Beta release we want to cleanup publicly exported
types and interfaces and do all necessary refactoring and breaking changes
now, before the Beta release. We will have a lot less leeway for breaking
changes after the Beta release.
Component related type declarations are now all in the `component` package.
This makes it possible for the interfaces to reference each other. This
was were very restricted earlier because component interfaces were in 5
different packages and many proposals were impossible to implement because
they would result in circular dependencies between packages.
(An example upcoming new capability that is enabled by this refactoring
is for components to query the Host for other components and for factories).
List of changes in this commit:
- Move all factory interfaces and component interfaces to component package.
- Rename old factories and components interfaces to use "Old" suffix for clarity.
- Eliminate forced checks that components implement factories. This is already
enforced by the compiler when the factory is added to the Defaults() and
was unnecessary code.
- Eliminated some unnecessary codes (removed overall over 200 lines).
- Run `go mod tidy` on testbed.
Warning: this is a breaking change to publicly exported types and function
signatures. We announced that a breaking change is comming. Once we agree
to merge this commit we will need to announce the exact list of changes
and guide component authors to modify their components accordingly.
Future changes:
- Once all components are migrated to the new internal representation,
delete all "Old"-suffixed definitions. This will likely be done while
we are still in Beta phase, before the Stable release.
This adds "to_attributes" functionality that complements already
existing "from_attributes" functionality. This is very useful for
extracting attributes from span names and reducing cardinality of
span names.
For usage and examples see rocessor/spanprocessor/config.go and
processor/spanprocessor/testdata/config.yaml.
Testing: unit tests added.
Documentation: see readme.md, config.go and config.yaml
Span Rename Processor exposes functionality to rename a span using attribute values from a span.
This commit only adds:
- the configuration
- tests for the configuration
- config documentation in the code and test yaml.
- Updated processor/readme.md to list all processors.
A follow up PR will add processor functionality and documentation to processor/readme.md
Bruno Garcia
Bogdan Drutu
Tigran Najaryan
Constance Caramanolis