- Meter is new, and makes more sense than
Metrics_callbacks/Metrics_emitter
- Instrument in core, with some basic counters, gauges, and histograms,
+ the possibility to do one's own
- Regenerate proto bindings with yojson support
- Add JSON encoding path in Resource_signal.Encode
- Pass protocol from config to generic_http_consumer
- Set Content-Type/Accept headers based on protocol
- Remove hardcoded protobuf headers from all HTTP client implementations
- Add yojson dependency
- Rename http_config to exporter_config with deprecated alias
- add OTEL_SDK_DISABLED support (sdk_disabled field)
- add OTEL_EXPORTER_OTLP_PROTOCOL support (Http_protobuf | Http_json)
- add OTEL_LOG_LEVEL support (log_level field replacing debug bool)
- add OTEL_EXPORTER_OTLP_TIMEOUT and per-signal timeout variants
- add per-signal headers
(OTEL_EXPORTER_OTLP_{TRACES,METRICS,LOGS}_HEADERS)
- add OTEL_SERVICE_NAME support
also remove some globals and put most config in `exporter_config.ml`,
which is no longer a private record.
Bug #1: Fix worker count logic in generic_consumer
- Was: min 2 (max 500 n_workers) - always created 2 workers
- Now: max 2 (min 500 n_workers) - properly clamps between 2-500
- Impact: Worker configuration was completely ignored
Bug #2: Handle missing dot in __FUNCTION__ name
- Added exception handling for String.rindex in trace span creation
- Prevents crash when tracing top-level or non-module functions
- Uses option type for module_path when no dot is present
- Scoped try/catch to only parsing logic
- clock is needed because timestamps need to be provided now
- explicit types are good anyway
- have at least one helper to emit the signal with optional
tracer/logger/metrics_emitter
- easier logger with `log` and `logf`
