refactoring: Masive refactor to build the V2

src/main/kotlin/eventDemo/configuration/ConfigureDIDataSources.kt

@@ -0,0 +1,55 @@
+package eventDemo.configuration
+
+import com.rabbitmq.client.ConnectionFactory
+import com.zaxxer.hikari.HikariConfig
+import com.zaxxer.hikari.HikariDataSource
+import org.koin.core.module.Module
+import org.koin.core.scope.Scope
+import org.koin.core.scope.ScopeCallback
+import org.koin.dsl.bind
+import redis.clients.jedis.JedisPooled
+import redis.clients.jedis.UnifiedJedis
+import javax.sql.DataSource
+
+fun Module.configureDIDataSource(config: Configuration) {
+  // PostgreSQL (for EventStore)
+  single {
+    hikariDataSource(config)
+      .apply {
+        registerCallback(
+          object : ScopeCallback {
+            override fun onScopeClose(scope: Scope) {
+              close()
+            }
+          },
+        )
+      }
+  } bind DataSource::class
+
+  // Redis (for Projections)
+  single {
+    JedisPooled(config.redisUrl)
+  } bind UnifiedJedis::class
+
+  // RabbitMQ (for EventBus)
+  factory {
+    ConnectionFactory().apply {
+      host = config.rabbitmq.url
+      port = config.rabbitmq.port
+      username = config.rabbitmq.username
+      password = config.rabbitmq.password
+    }
+  }
+}
+
+private fun hikariDataSource(config: Configuration): HikariDataSource =
+  HikariConfig()
+    .apply {
+      jdbcUrl = config.postgresql.url
+      username = config.postgresql.username
+      password = config.postgresql.password
+      maximumPoolSize = 10
+      minimumIdle = 10
+    }.let {
+      HikariDataSource(it)
+    }