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-rw-r--r--internal/statsengine/engine.go16
1 files changed, 16 insertions, 0 deletions
diff --git a/internal/statsengine/engine.go b/internal/statsengine/engine.go
index f9602a9..b7d93fa 100644
--- a/internal/statsengine/engine.go
+++ b/internal/statsengine/engine.go
@@ -23,6 +23,22 @@ const (
DefaultTopN = 64
)
+// Accumulator is the event-ingestion side of the stats engine.
+// It accepts incoming event pairs (Ingest) and supports resetting all
+// accumulated state back to zero (Reset). Snapshot building is a separate
+// responsibility expressed by runtime.SnapshotSource; separating the two
+// satisfies SRP — callers that only push events hold an Accumulator, while
+// callers that only read statistics hold a SnapshotSource.
+type Accumulator interface {
+ // Ingest records one event pair into the in-memory aggregates.
+ Ingest(pair *event.Pair)
+ // Reset clears all accumulated stats and restarts series baselines.
+ Reset()
+}
+
+// compile-time assertion: *Engine must satisfy Accumulator.
+var _ Accumulator = (*Engine)(nil)
+
// Engine aggregates streaming syscall data into immutable snapshots.
type Engine struct {
mu sync.Mutex