graph LR
_mapping_module["_mapping module"]
PrometheusMetricReader["PrometheusMetricReader"]
_CustomCollector["_CustomCollector"]
PrometheusMetricReader -- "uses" --> _mapping_module
PrometheusMetricReader -- "uses" --> _CustomCollector
The Prometheus Exporter for OpenTelemetry is designed to bridge OpenTelemetry's metric collection capabilities with Prometheus's monitoring system. It allows applications instrumented with OpenTelemetry to expose their metrics in a format that Prometheus can scrape and process. The core components involved are the PrometheusMetricReader, which collects and formats metrics, and a _CustomCollector (likely an internal class) that registers with Prometheus to serve these metrics. The _mapping module plays a crucial role in translating OpenTelemetry's internal metric representation into Prometheus's data model, ensuring compatibility and correct interpretation of metrics.
The _mapping module likely contains logic for mapping OpenTelemetry concepts to Prometheus-compatible formats, such as metric names, labels, and types. This is crucial for ensuring that the exported metrics adhere to Prometheus's data model.
Related Classes/Methods:
The PrometheusMetricReader is responsible for collecting metrics from the OpenTelemetry SDK and exposing them in a Prometheus-compatible format. It acts as the bridge between the OpenTelemetry's internal metric representation and Prometheus's scraping mechanism.
Related Classes/Methods:
The _CustomCollector likely implements the Collector interface from the Prometheus client library. This custom collector would be responsible for registering with the Prometheus registry and serving the metrics collected by the PrometheusMetricReader when Prometheus scrapes the exporter's endpoint.
Related Classes/Methods: