common/logger/otlp_handler.go
Ask Bjørn Hansen 66b51df2af feat(logger): add runtime log level control API
Add independent log level control for stderr and OTLP loggers.
Both can be configured via environment variables or programmatically
at runtime.

- Add SetLevel() and SetOTLPLevel() for runtime control
- Add ParseLevel() to convert strings to slog.Level
- Support LOG_LEVEL and OTLP_LOG_LEVEL env vars
- Maintain backward compatibility with DEBUG env var
- Add comprehensive test coverage
2025-09-06 05:21:33 -07:00

49 lines
1.4 KiB
Go

package logger
import (
"context"
"log/slog"
)
// otlpLevelHandler is a wrapper that enforces level checking for OTLP handlers.
// This allows independent level control for OTLP output separate from stderr logging.
type otlpLevelHandler struct {
next slog.Handler
}
// newOTLPLevelHandler creates a new OTLP level wrapper handler.
func newOTLPLevelHandler(next slog.Handler) slog.Handler {
return &otlpLevelHandler{
next: next,
}
}
// Enabled checks if the log level should be processed by the OTLP handler.
// It uses the OTLPLevel variable to determine if the record should be processed.
func (h *otlpLevelHandler) Enabled(ctx context.Context, level slog.Level) bool {
return level >= OTLPLevel.Level()
}
// Handle processes the log record if the level is enabled.
// If disabled by level checking, the record is silently dropped.
func (h *otlpLevelHandler) Handle(ctx context.Context, r slog.Record) error {
if !h.Enabled(ctx, r.Level) {
return nil
}
return h.next.Handle(ctx, r)
}
// WithAttrs returns a new handler with the specified attributes added.
func (h *otlpLevelHandler) WithAttrs(attrs []slog.Attr) slog.Handler {
return &otlpLevelHandler{
next: h.next.WithAttrs(attrs),
}
}
// WithGroup returns a new handler with the specified group name.
func (h *otlpLevelHandler) WithGroup(name string) slog.Handler {
return &otlpLevelHandler{
next: h.next.WithGroup(name),
}
}