refactor deprecated api

Author: AriaMoradi

server/src/main/kotlin/suwayomi/tachidesk/server/database/DBManager.kt

@@ -9,22 +9,36 @@ package suwayomi.tachidesk.server.database
 
 import de.neonew.exposed.migrations.loadMigrationsFrom
 import de.neonew.exposed.migrations.runMigrations
+import mu.KotlinLogging
 import org.jetbrains.exposed.sql.Database
+import org.jetbrains.exposed.sql.DatabaseConfig
 import org.kodein.di.DI
 import org.kodein.di.conf.global
 import org.kodein.di.instance
 import suwayomi.tachidesk.server.ApplicationDirs
 import suwayomi.tachidesk.server.ServerConfig
 
 object DBManager {
+
     val db by lazy {
         val applicationDirs by DI.global.instance<ApplicationDirs>()
-        Database.connect("jdbc:h2:${applicationDirs.dataRoot}/database", "org.h2.Driver")
+        Database.connect(
+            "jdbc:h2:${applicationDirs.dataRoot}/database",
+            "org.h2.Driver",
+            databaseConfig = DatabaseConfig {
+                useNestedTransactions = true
+            }
+        )
     }
 }
 
+private val logger = KotlinLogging.logger {}
+
 fun databaseUp(db: Database = DBManager.db) {
-    db.useNestedTransactions = true
+    // call db to initialize the lazy object
+    logger.info {
+        "Using ${db.vendor} database version ${db.version}"
+    }
 
     val migrations = loadMigrationsFrom("suwayomi.tachidesk.server.database.migration", ServerConfig::class.java)
     runMigrations(migrations)