Documentation
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Overview ¶
Package correlation provides a sealed read-model carrying the three cross-cutting observability IDs (trace, request, correlation) for use in issue #1048 (trace → audit reverse lookup).
Correlation is a sealed value type: its fields are unexported, so the only way to obtain a non-zero Correlation outside this package is via New. Package-external struct literals cannot set the unexported fields, making fabrication structurally impossible (Hard sealed construction, upstream single-source for #1048).
Layering note (KERNEL-INTERNAL-DAG-01): kernel/observability is a leaf in the kernel-internal DAG — kernel/outbox imports kernel/observability/metrics for its metrics provider, so the reverse edge (observability → outbox) is a forbidden cycle. This package therefore does NOT import kernel/outbox; it takes the three IDs as plain strings. The bridge from the W0 outbox observability envelope (kernel/outbox.ObservabilityMetadata) lives at the sole consumer — the audit appender (corecells/auditcore/internal/appender) — which holds both the outbox.Entry and this read-model. The seal (unexported fields + single constructor) is preserved regardless of where the bridge lives; trust in the IDs is positional (the appender feeds entry.Observability() values, which originate from the sealed outbox.Entry).
Index ¶
Constants ¶
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Variables ¶
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Functions ¶
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Types ¶
type Correlation ¶
type Correlation struct {
// contains filtered or unexported fields
}
Correlation is a sealed read-model carrying the three cross-cutting observability IDs; see the package doc for the provenance/layering rationale.
func New ¶
func New(traceID, requestID, correlationID string) Correlation
New constructs a Correlation from the three cross-cutting observability IDs. It is the single construction path — there is no other constructor. TraceParent is intentionally not carried: Correlation represents the three opaque IDs, not the full W3C propagation context. Callers bridging from the W0 outbox observability envelope pass string(meta.TraceID), string(meta.RequestID) and string(meta.CorrelationID).
func (Correlation) CorrelationID ¶
func (c Correlation) CorrelationID() string
CorrelationID returns the correlation ID. Returns empty string for a zero-value Correlation.
func (Correlation) RequestID ¶
func (c Correlation) RequestID() string
RequestID returns the request ID. Returns empty string for a zero-value Correlation.
func (Correlation) TraceID ¶
func (c Correlation) TraceID() string
TraceID returns the trace ID. Returns empty string for a zero-value Correlation.
Source Files