feat(alerting): ROUTE_METRIC evaluator

P95_LATENCY_MS maps to avgDurationMs (ExecutionStats has no p95 bucket). Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
2026-04-19 19:36:22 +02:00
parent 983b698266
commit 07d0386bf2
2 changed files with 217 additions and 0 deletions
--- a/cameleer-server-app/src/main/java/com/cameleer/server/app/alerting/eval/RouteMetricEvaluator.java
+++ b/cameleer-server-app/src/main/java/com/cameleer/server/app/alerting/eval/RouteMetricEvaluator.java
@@ -0,0 +1,80 @@
+package com.cameleer.server.app.alerting.eval;
+
+import com.cameleer.server.core.alerting.AlertRule;
+import com.cameleer.server.core.alerting.ConditionKind;
+import com.cameleer.server.core.alerting.RouteMetricCondition;
+import com.cameleer.server.core.runtime.EnvironmentRepository;
+import com.cameleer.server.core.search.ExecutionStats;
+import com.cameleer.server.core.storage.StatsStore;
+import org.springframework.stereotype.Component;
+
+import java.time.Instant;
+import java.util.Map;
+
+@Component
+public class RouteMetricEvaluator implements ConditionEvaluator<RouteMetricCondition> {
+
+    private final StatsStore statsStore;
+    private final EnvironmentRepository envRepo;
+
+    public RouteMetricEvaluator(StatsStore statsStore, EnvironmentRepository envRepo) {
+        this.statsStore = statsStore;
+        this.envRepo    = envRepo;
+    }
+
+    @Override
+    public ConditionKind kind() { return ConditionKind.ROUTE_METRIC; }
+
+    @Override
+    public EvalResult evaluate(RouteMetricCondition c, AlertRule rule, EvalContext ctx) {
+        Instant from = ctx.now().minusSeconds(c.windowSeconds());
+        Instant to   = ctx.now();
+
+        String envSlug = envRepo.findById(rule.environmentId())
+                .map(e -> e.slug())
+                .orElse(null);
+
+        String appSlug  = c.scope() != null ? c.scope().appSlug()  : null;
+        String routeId  = c.scope() != null ? c.scope().routeId()  : null;
+
+        ExecutionStats stats;
+        if (routeId != null) {
+            stats = statsStore.statsForRoute(from, to, routeId, appSlug, envSlug);
+        } else if (appSlug != null) {
+            stats = statsStore.statsForApp(from, to, appSlug, envSlug);
+        } else {
+            stats = statsStore.stats(from, to, envSlug);
+        }
+
+        double actual = switch (c.metric()) {
+            case ERROR_RATE     -> errorRate(stats);
+            // ExecutionStats has no p95 field; avgDurationMs is the closest available proxy
+            case P95_LATENCY_MS -> (double) stats.avgDurationMs();
+            case P99_LATENCY_MS -> (double) stats.p99LatencyMs();
+            case THROUGHPUT     -> (double) stats.totalCount();
+            case ERROR_COUNT    -> (double) stats.failedCount();
+        };
+
+        boolean fire = switch (c.comparator()) {
+            case GT  -> actual >  c.threshold();
+            case GTE -> actual >= c.threshold();
+            case LT  -> actual <  c.threshold();
+            case LTE -> actual <= c.threshold();
+            case EQ  -> actual == c.threshold();
+        };
+
+        if (!fire) return EvalResult.Clear.INSTANCE;
+
+        return new EvalResult.Firing(actual, c.threshold(),
+                Map.of(
+                        "route", Map.of("id",   routeId  == null ? "" : routeId),
+                        "app",   Map.of("slug",  appSlug  == null ? "" : appSlug)
+                )
+        );
+    }
+
+    private double errorRate(ExecutionStats s) {
+        long total = s.totalCount();
+        return total == 0 ? 0.0 : (double) s.failedCount() / total;
+    }
+}