create GameListRepositoryInRedis

2025-04-14 23:40:11 +02:00
parent 2fb4c778fd
commit 70d596acf0
4 changed files with 79 additions and 14 deletions
@@ -0,0 +1,57 @@
+package eventDemo.adapter.infrastructureLayer.event.projection
+
+import eventDemo.business.entity.GameId
+import eventDemo.business.event.GameEventBus
+import eventDemo.business.event.GameEventStore
+import eventDemo.business.event.projection.GameProjectionBus
+import eventDemo.business.event.projection.gameList.GameList
+import eventDemo.business.event.projection.gameList.GameListRepository
+import eventDemo.business.event.projection.gameList.apply
+import eventDemo.business.event.projection.gameState.GameState
+import eventDemo.libs.event.projection.ProjectionSnapshotRepositoryInRedis
+import eventDemo.libs.event.projection.SnapshotConfig
+import io.github.oshai.kotlinlogging.withLoggingContext
+import kotlinx.serialization.json.Json
+import redis.clients.jedis.UnifiedJedis
+
+/**
+ * Manages [projections][GameList], their building and publication in the [bus][GameProjectionBus].
+ */
+class GameListRepositoryInRedis(
+  eventStore: GameEventStore,
+  jedis: UnifiedJedis,
+  snapshotConfig: SnapshotConfig = SnapshotConfig(),
+) : GameListRepository {
+  private val projectionsSnapshot =
+    ProjectionSnapshotRepositoryInRedis(
+      eventStore = eventStore,
+      snapshotCacheConfig = snapshotConfig,
+      initialStateBuilder = { aggregateId: GameId -> GameList(aggregateId) },
+      projectionClass = GameList::class,
+      projectionToJson = { Json.encodeToString(GameList.serializer(), it) },
+      jsonToProjection = { Json.decodeFromString(GameList.serializer(), it) },
+      applyToProjection = GameList::apply,
+      jedis = jedis,
+    )
+
+  fun subscribeToBus(
+    projectionBus: GameProjectionBus,
+    eventBus: GameEventBus,
+  ) {
+    eventBus.subscribe { event ->
+      withLoggingContext("event" to event.toString()) {
+        projectionsSnapshot
+          .applyAndPutToCache(event)
+          .also { projectionBus.publish(it) }
+      }
+    }
+  }
+
+  /**
+   * Get the last version of the [GameState] from the all eventStream.
+   *
+   * It fetches it from the local cache if possible, otherwise it builds it.
+   */
+  override fun getList(): List<GameList> =
+    projectionsSnapshot.getList()
+}