[CONFIGURATION] File configuration - component registry

[marcalff]

Contributes to #2481

This is a partial fix, that implements the component registry.

Changes

Please provide a brief description of the changes here.

• Implement the component registry:
  • Core component are made available using a build function, to avoid link dependencies on optional components.
  • Extension points are registered by name

For significant contributions please make sure you have completed the following items:

• CHANGELOG.md updated for non-trivial changes
• Unit tests have been added
• Changes in public API reviewed

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 89.99%. Comparing base (0e51e67) to head (ea1d2d9).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #3537   +/-   ##
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  Coverage   89.99%   89.99%           
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  Files         219      219           
  Lines        7048     7048           
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  Hits         6342     6342           
  Misses        706      706           

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[Copilot]

Pull Request Overview

Implements a component registry to manage core and extension builders by name, allowing deferred binding of optional components.

• Introduce a Registry class for storing and retrieving core and extension component builders.
• Define abstract builder interfaces for propagators, exporters, samplers, processors, and metric readers under sdk/init.
• Populate default TextMapPropagatorBuilder implementations for tracecontext, baggage, B3 (single and multi-header), and Jaeger in registry.cc.

Reviewed Changes

Copilot reviewed 24 out of 24 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
sdk/src/init/registry.cc	Register default TextMapPropagatorBuilders and implement registry lookup/add methods
sdk/include/opentelemetry/sdk/init/registry.h	Declare Registry class with maps for core and extension component builders
sdk/include/opentelemetry/sdk/init/text_map_propagator_builder.h	Define abstract TextMapPropagatorBuilder interface
sdk/include/opentelemetry/sdk/init/zipkin_span_exporter_builder.h	Define ZipkinSpanExporterBuilder interface
sdk/include/opentelemetry/sdk/init/prometheus_pull_metric_exporter_builder.h	Define PrometheusPullMetricExporterBuilder interface
sdk/include/opentelemetry/sdk/init/otlp_http_span_exporter_builder.h	Define OtlpHttpSpanExporterBuilder interface
sdk/include/opentelemetry/sdk/init/otlp_http_push_metric_exporter_builder.h	Define OtlpHttpPushMetricExporterBuilder interface
sdk/include/opentelemetry/sdk/init/otlp_http_log_record_exporter_builder.h	Define OtlpHttpLogRecordExporterBuilder interface
sdk/include/opentelemetry/sdk/init/otlp_grpc_span_exporter_builder.h	Define OtlpGrpcSpanExporterBuilder interface
sdk/include/opentelemetry/sdk/init/otlp_grpc_push_metric_exporter_builder.h	Define OtlpGrpcPushMetricExporterBuilder interface
sdk/include/opentelemetry/sdk/init/otlp_grpc_log_record_exporter_builder.h	Define OtlpGrpcLogRecordExporterBuilder interface
sdk/include/opentelemetry/sdk/init/otlp_file_span_exporter_builder.h	Define OtlpFileSpanExporterBuilder interface
sdk/include/opentelemetry/sdk/init/otlp_file_push_metric_exporter_builder.h	Define OtlpFilePushMetricExporterBuilder interface
sdk/include/opentelemetry/sdk/init/otlp_file_log_record_exporter_builder.h	Define OtlpFileLogRecordExporterBuilder interface
sdk/include/opentelemetry/sdk/init/extension_span_processor_builder.h	Define ExtensionSpanProcessorBuilder interface
sdk/include/opentelemetry/sdk/init/extension_span_exporter_builder.h	Define ExtensionSpanExporterBuilder interface
sdk/include/opentelemetry/sdk/init/extension_sampler_builder.h	Define ExtensionSamplerBuilder interface
sdk/include/opentelemetry/sdk/init/extension_push_metric_exporter_builder.h	Define ExtensionPushMetricExporterBuilder interface
sdk/include/opentelemetry/sdk/init/extension_pull_metric_exporter_builder.h	Define ExtensionPullMetricExporterBuilder interface
sdk/include/opentelemetry/sdk/init/extension_log_record_processor_builder.h	Define ExtensionLogRecordProcessorBuilder interface
sdk/include/opentelemetry/sdk/init/extension_log_record_exporter_builder.h	Define ExtensionLogRecordExporterBuilder interface
sdk/include/opentelemetry/sdk/init/console_span_exporter_builder.h	Define ConsoleSpanExporterBuilder interface
sdk/include/opentelemetry/sdk/init/console_push_metric_exporter_builder.h	Define ConsolePushMetricExporterBuilder interface
sdk/include/opentelemetry/sdk/init/console_log_record_exporter_builder.h	Define ConsoleLogRecordExporterBuilder interface

Comments suppressed due to low confidence (1)

sdk/src/init/registry.cc:103

• Consider adding unit tests for Registry::GetTextMapPropagatorBuilder and AddTextMapPropagatorBuilder to validate registration and lookup behavior.

  auto search                       = m_propagator_builders.find(name);

[marcalff]

@dbarker Thanks for the first round of review.

All comments addressed, please take another look.

[marcalff]

@Copilot Please take another look.

[dbarker]

LGTM. Thanks!