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Signed-off-by: yosrixp <yosrixp@yahoo.com>
MartinTrojans
approved these changes
Apr 2, 2026
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MCP OAuth Proxy: application metrics (
mop_*)Instrumentation: Custom OpenTelemetry Metrics via
GlobalOpenTelemetry.getMeter("mcp-oauth-proxy")inOauthProxyMetrics(Quarkusquarkus.otel.metrics.enabled). Counters, histograms (explicit second buckets), and an up/down gauge for in-flight HTTP; export follows the app’s OTLP pipeline into Chronosphere / Prometheus-style series (mop_*_total,mop_*_seconds_bucket/_sum/_count).Coverage: HTTP 4xx/5xx and aggregate errors; token path (issuance, auth-code / refresh / client-credentials grants, authorize redirect); UserInfo requests and duration; E2E token exchange and per-step exchange latency; upstream HTTP latency; retries; dynamic client registration; OIDC discovery; cross-region Dynamo auth-code fallback (triggered / exhausted) and cross-region Dynamo failures; auth-code validation failures (PKCE, binding, replay, etc.).
Labels: Shared dimensions include
oauth_provider,oauth_client,oauth_grant_type,outcome, routes, HTTP status,exchange_step,upstream_endpoint, regions for fallback, etc.OauthProviderLabel/OauthClientLabelnormalize blanks tounknownand canonicalize known IdPs;TelemetryProviderResolvermaps RFC 8707 resource URIs to the same provider semantics as token exchange (e.g. auth-code validation metrics).TelemetryJaxrsFilterties HTTP error metrics to request context (route, provider, client).MetricsRegionProvidersupplies primary region for relevant series.Bootstrap: On startup, zero samples register selected instruments so empty label combinations appear in backends where needed (with follow-ups so token issuance does not emit an all-empty series).