feat(ingress): 实现 JDBC 信箱轮询、入站持久化与对拍测试 (U05)

src/main/kotlin/com/gzzn/omms/msgexchange/infra/health/HealthIndicators.kt

@@ -0,0 +1,55 @@
+package com.gzzn.omms.msgexchange.infra.health
+
+import com.gzzn.omms.msgexchange.delivery.DeliveryPort
+import com.gzzn.omms.msgexchange.infra.redis.FlightRedisClient
+import io.micronaut.context.BeanProvider
+import io.micronaut.core.async.publisher.Publishers
+import io.micronaut.health.HealthStatus
+import io.micronaut.management.health.indicator.HealthIndicator
+import io.micronaut.management.health.indicator.HealthResult
+import jakarta.inject.Singleton
+import org.reactivestreams.Publisher
+
+/**
+ * U12（R05）：阶段 A 关键依赖的自定义健康指示器——
+ * Redis（flightInfo 权威存储）与 Kafka（投递端口）。经 BeanProvider 可选解析：
+ * 缺 bean（如未用 stub 也未实装）时指示 DOWN 而非启动失败；
+ * UP 判据为真实 ping（false/异常 → DOWN），而非仅 bean 存在（复审 P1 修正）。
+ */
+@Singleton
+class FlightRedisHealthIndicator(
+    private val redis: BeanProvider<FlightRedisClient>,
+) : HealthIndicator {
+
+    override fun getResult(): Publisher<HealthResult> =
+        Publishers.just(redisHealth(if (redis.isPresent) redis.get() else null))
+}
+
+@Singleton
+class KafkaDeliveryHealthIndicator(
+    private val port: BeanProvider<DeliveryPort>,
+) : HealthIndicator {
+
+    override fun getResult(): Publisher<HealthResult> =
+        Publishers.just(kafkaHealth(if (port.isPresent) port.get() else null))
+}
+
+/** ping 判定独立成纯函数便于单测：client 为 null = bean 缺失；ping false/异常 = DOWN。 */
+internal fun redisHealth(client: FlightRedisClient?): HealthResult =
+    healthOf("redis-flight-store", "flight store", client?.let {
+        try { it.ping() } catch (e: Exception) { false }
+    })
+
+internal fun kafkaHealth(port: DeliveryPort?): HealthResult =
+    healthOf("kafka-delivery", "delivery port", port?.let {
+        try { it.ping() } catch (e: Exception) { false }
+    })
+
+private fun healthOf(name: String, what: String, pingOk: Boolean?): HealthResult {
+    val (status, message) = when (pingOk) {
+        null -> HealthStatus.DOWN to "$what bean missing (stub off, impl pending)"
+        false -> HealthStatus.DOWN to "$what ping failed"
+        true -> HealthStatus.UP to "$what ping ok"
+    }
+    return HealthResult.builder(name).status(status).details(mapOf("message" to message)).build()
+}