Search analytics

SearchAnalytics is an in-memory ring buffer of recent search events. Older entries are dropped when the buffer is full.

Set up

using Rowles.LeanLucene.Diagnostics;

var analytics = new SearchAnalytics(capacity: 1000);
var config = new IndexSearcherConfig { SearchAnalytics = analytics };

Read recent events

var recent = analytics.GetRecentEvents(count: 50);
foreach (var e in recent)
    Console.WriteLine($"{e.Timestamp:O} {e.QueryType} {e.ElapsedMs}ms hits={e.TotalHits} cache={e.CacheHit}");

GetRecentEvents and DrainEvents consume entries; events read once are not returned by subsequent calls.

Export as JSON

using var writer = new StreamWriter("./events.json");
analytics.ExportJson(writer);

Writes a JSON array. The buffer is drained.

Event fields

Timestamp, QueryType, Query, ElapsedMs, TotalHits, CacheHit.

See also

• SearchAnalytics
• SearchEvent