race condition fix

client/build/tmp/shadowJar/MANIFEST.MF

@@ -1,4 +1,3 @@
 Manifest-Version: 1.0
 Main-Class: MainKt
-Multi-Release: true
 

server/build/kotlin/compileKotlin/cacheable/caches-jvm/jvm/kotlin/proto.tab.values.s

@@ -1 +1 @@
-�F
+ﾝF澎

server/build/kotlin/compileKotlin/cacheable/caches-jvm/lookups/counters.tab

@@ -1,2 +1,2 @@
-30
+43
 0

server/build/tmp/shadowJar/MANIFEST.MF

@@ -1,4 +1,3 @@
 Manifest-Version: 1.0
 Main-Class: MainKt
-Multi-Release: true
 

server/src/main/kotlin/Main.kt

@@ -1,9 +1,7 @@
 import auth.JWTManager
-import collection.CollectionManager
-import commands.*
-import database.CacheInvalidator
 import database.DatabaseManager
 import database.Repository
+import commands.*
 import mu.KotlinLogging
 import network.NetworkManager
 import runner.CommandInvoker
@@ -24,28 +22,16 @@ fun main(args: Array<String>) {
     database.start()
     val repository = Repository(jwtManager)
 
-    val manager = CollectionManager()
-    manager.loadFromFile(repository.read())
-
-    // Синхронизация кэша между серверами через PG NOTIFY
-    val cacheInvalidator = CacheInvalidator(database.dataSource) {
-        manager.loadFromFile(repository.read())
-    }
-    cacheInvalidator.start()
-
     val invoker = CommandInvoker(jwtManager)
 
-    registerServerCommands(invoker, manager, repository)
+    registerServerCommands(invoker, repository)
 
-    // (Ctrl+C or kill)
     val server = NetworkManager(port = port, invoker = invoker, repository = repository)
     Runtime.getRuntime().addShutdownHook(Thread {
         logger.info{ "Exit..." }
-        cacheInvalidator.stop()
         server.stop()
     })
 
-    // Server-side console
     Thread {
         val scanner = java.util.Scanner(System.`in`)
         logger.info{ "[Server-console] Server-side commands: exit" }
@@ -69,23 +55,22 @@ private fun loadDotEnv() {
 
 fun registerServerCommands(
     invoker: CommandInvoker,
-    manager: CollectionManager,
     repository: Repository
 ) {
     listOf(
-        InfoCommand(manager),
-        ShowCommand(manager),
-        AddCommand(manager, repository),
-        UpdateCommand(manager, repository),
-        RemoveByIdCommand(manager, repository),
-        ClearCommand(manager, repository),
-        AddIfMaxCommand(manager, repository),
-        AddIfMinCommand(manager, repository),
+        InfoCommand(repository),
+        ShowCommand(repository),
+        AddCommand(repository),
+        UpdateCommand(repository),
+        RemoveByIdCommand(repository),
+        ClearCommand(repository),
+        AddIfMaxCommand(repository),
+        AddIfMinCommand(repository),
         HistoryCommand(invoker),
         SyncCommand(invoker),
-        SumOfMinutesCommand(manager),
-        MinByNameCommand(manager),
-        PrintDescendingMinutesCommand(manager),
+        SumOfMinutesCommand(repository),
+        MinByNameCommand(repository),
+        PrintDescendingMinutesCommand(repository),
     ).forEach { invoker.register(it)}
     logger.info{ " [startup] Registered commands: ${invoker.getCommands().keys}" }
 }

server/src/main/kotlin/collection/CollectionManager.kt

@@ -1,106 +0,0 @@
-package collection
-
-import models.HumanBeing
-import mu.KotlinLogging
-import java.time.LocalDate
-import java.util.Collections
-import java.util.TreeSet
-import java.util.UUID
-
-private val logger = KotlinLogging.logger {}
-
-class CollectionManager {
-
-    private val collection: MutableSet<HumanBeing> =
-        Collections.synchronizedSortedSet(TreeSet())
-
-    val initDate: LocalDate = LocalDate.now()
-
-    fun add(humanBeing: HumanBeing): Boolean {
-        logger.info { "[ADD] Element created ${humanBeing.id}" }
-        return collection.add(humanBeing)
-    }
-
-    fun update(id: UUID, updated: HumanBeing): Boolean {
-        synchronized(collection) {
-            val old = getById(id) ?: return false
-            collection.remove(old)
-            val replaced = updated.copy(id = old.id, creationDate = old.creationDate)
-            logger.info { "[UPDATE] Element updated ${old.id}" }
-            return collection.add(replaced)
-        }
-    }
-
-    fun removeById(id: UUID): Boolean {
-        val target = getById(id) ?: return false
-        logger.info { "[REMOVE] Element deleted ${target.id}" }
-        return collection.remove(target)
-    }
-
-    fun clear() {
-        collection.clear()
-        logger.info { "[CLEAR] Collection cleared" }
-    }
-
-    fun getAll(): TreeSet<HumanBeing> {
-        synchronized(collection) {
-            return TreeSet(collection)
-        }
-    }
-
-    fun getById(id: UUID): HumanBeing? {
-        synchronized(collection) {
-            return collection.firstOrNull { it.id == id }
-        }
-    }
-
-    fun size(): Int = collection.size
-
-    fun isEmpty(): Boolean = collection.isEmpty()
-
-    fun getMax(): HumanBeing? {
-        synchronized(collection) {
-            return collection.maxWithOrNull(Comparator.naturalOrder())
-        }
-    }
-
-    fun getMin(): HumanBeing? {
-        synchronized(collection) {
-            return collection.minWithOrNull(Comparator.naturalOrder())
-        }
-    }
-
-    fun sumOfMinutesOfWaiting(): Double {
-        synchronized(collection) {
-            return collection.sumOf { it.minutesOfWaiting.toDouble() }
-        }
-    }
-
-    fun minByName(): HumanBeing? {
-        synchronized(collection) {
-            return collection.minByOrNull { it.name }
-        }
-    }
-
-    fun getMinutesOfWaitingDescending(): List<Float> {
-        synchronized(collection) {
-            return collection.map { it.minutesOfWaiting }.sortedDescending()
-        }
-    }
-
-    fun loadFromFile(items: List<HumanBeing>) {
-        synchronized(collection) {
-            collection.clear()
-            collection.addAll(items)
-        }
-        logger.info { "[LOAD] loaded ${items.size} elements" }
-    }
-
-    fun getInfo(): String =
-        """
-         |Тип коллекции : ${collection::class.simpleName}
-         |Тип элементов : ${HumanBeing::class.simpleName}
-         |Дата инициал. : $initDate
-         |Кол-во элемен.: ${collection.size}
-         """.trimMargin()
-}

server/src/main/kotlin/commands/AddCommand.kt

@@ -1,6 +1,5 @@
 package commands
 
-import collection.CollectionManager
 import database.Repository
 import kotlinx.serialization.Contextual
 import kotlinx.serialization.Serializable
@@ -10,7 +9,6 @@ import java.util.UUID
 
 @Serializable
 class AddCommand(
-    @Contextual private val manager: CollectionManager,
     @Contextual private val repository: Repository
 ) : Command {
     override val name = "add"
@@ -23,11 +21,6 @@ class AddCommand(
         val secured = humanBeing.copy(ownerId = UUID.fromString(userId))
         secured.id = repository.write(secured)
         secured.id ?: return Response(false, "Не удалось добавить элемент")
-
-        return if (manager.add(secured))
-            Response(true, "Элемент добавлен: ${secured.name} [${secured.id}]")
-
-        else
-            Response(false, "Элемент уже существует в коллекции.")
+        return Response(true, "Элемент добавлен: ${secured.name} [${secured.id}]")
     }
 }

server/src/main/kotlin/commands/AddIfMaxCommand.kt

@@ -1,6 +1,5 @@
 package commands
 
-import collection.CollectionManager
 import database.Repository
 import kotlinx.serialization.Contextual
 import kotlinx.serialization.Serializable
@@ -10,7 +9,6 @@ import java.util.UUID
 
 @Serializable
 class AddIfMaxCommand(
-    @Contextual val manager: CollectionManager,
     @Contextual private val repository: Repository
 ) : Command {
     override val name = "add_if_max"
@@ -21,11 +19,10 @@ class AddIfMaxCommand(
     override fun execute(args: List<String>, humanBeing: HumanBeing?, userId: String): Response {
         humanBeing ?: return Response(false, "[Ошибка] Объект HumanBeing не передан.")
         val secured = humanBeing.copy(ownerId = UUID.fromString(userId))
-        val max = manager.getMax()
+        val max = repository.getMax()
         return if (max == null || secured > max) {
             secured.id = repository.write(secured)
             secured.id ?: return Response(false, "Не удалось добавить элемент")
-            manager.add(secured)
             Response(true, "Элемент добавлен (превышает максимум).")
         } else {
             Response(false, "Элемент не добавлен: не превышает текущий максимум (${max.name}).")

server/src/main/kotlin/commands/AddIfMinCommand.kt

@@ -1,6 +1,5 @@
 package commands
 
-import collection.CollectionManager
 import database.Repository
 import models.HumanBeing
 import kotlinx.serialization.Serializable
@@ -10,7 +9,6 @@ import java.util.UUID
 
 @Serializable
 class AddIfMinCommand(
-    @Contextual private val manager: CollectionManager,
     @Contextual private val repository: Repository
 ) : Command {
     override val name = "add_if_min"
@@ -21,11 +19,10 @@ class AddIfMinCommand(
     override fun execute(args: List<String>, humanBeing: HumanBeing?, userId: String): Response {
         humanBeing ?: return Response(false, "[Ошибка] Объект HumanBeing не передан.")
         val secured = humanBeing.copy(ownerId = UUID.fromString(userId))
-        val min = manager.getMin()
+        val min = repository.getMin()
         return if (min == null || secured < min) {
             secured.id = repository.write(secured)
             secured.id ?: return Response(false, "Не удалось добавить элемент")
-            manager.add(secured)
             Response(true, "Элемент добавлен (меньше минимума).")
         } else {
             Response(false, "Элемент не добавлен: не меньше текущего минимума (${min.name}).")

server/src/main/kotlin/commands/ClearCommand.kt

@@ -1,6 +1,5 @@
 package commands
 
-import collection.CollectionManager
 import database.Repository
 import kotlinx.serialization.Contextual
 import kotlinx.serialization.Serializable
@@ -10,7 +9,6 @@ import java.util.UUID
 
 @Serializable
 class ClearCommand(
-    @Contextual private val manager: CollectionManager,
     @Contextual private var repository: Repository
 ) : Command {
     override val name = "clear"
@@ -23,9 +21,6 @@ class ClearCommand(
         val ownerId = UUID.fromString(userId)
 
         val deletedCount = repository.deleteByOwner(ownerId)
-        val toRemove = manager.getAll().filter { it.ownerId == ownerId }
-        toRemove.forEach { manager.removeById(it.id!!) }
-
         return Response(true, "Удалено объектов: $deletedCount.")
     }
 }

server/src/main/kotlin/commands/InfoCommand.kt

@@ -1,18 +1,18 @@
 package commands
 
-import collection.CollectionManager
+import database.Repository
 import kotlinx.serialization.Contextual
 import kotlinx.serialization.Serializable
 import models.HumanBeing
 import network.Response
 
 @Serializable
-class InfoCommand(@Contextual private val manager: CollectionManager) : Command {
+class InfoCommand(@Contextual private val repository: Repository) : Command {
     override val name = "info"
     override val description = "вывести информацию о коллекции"
     override val type = CommandType.SIMPLE
     override val args = listOf(CommandArgType.NONE)
 
     override fun execute(args: List<String>, humanBeing: HumanBeing?, userId: String): Response =
-        Response(true, manager.getInfo())
+        Response(true, repository.getInfo())
 }

server/src/main/kotlin/commands/MinByNameCommand.kt

@@ -1,21 +1,18 @@
 package commands
 
-import collection.CollectionManager
+import database.Repository
 import kotlinx.serialization.Contextual
 import kotlinx.serialization.Serializable
 import models.HumanBeing
 import network.Response
 
-/**
- * Выводит любой элемент с минимальным значением поля [HumanBeing.name].
- */
 @Serializable
-class MinByNameCommand(@Contextual private val manager: CollectionManager) : Command {
+class MinByNameCommand(@Contextual private val repository: Repository) : Command {
     override val name = "min_by_name"
     override val description = "вывести элемент с минимальным именем"
     override val type = CommandType.SIMPLE
     override val args = listOf(CommandArgType.NONE)
 
     override fun execute(args: List<String>, humanBeing: HumanBeing?, userId: String): Response =
-        Response(true, manager.minByName()?.toString() ?: "Коллекция пуста.")
+        Response(true, repository.minByName()?.toString() ?: "Коллекция пуста.")
 }

server/src/main/kotlin/commands/PrintDescendingMinutesCommand.kt

@@ -1,23 +1,20 @@
 package commands
 
-import collection.CollectionManager
+import database.Repository
 import kotlinx.serialization.Contextual
 import kotlinx.serialization.Serializable
 import models.HumanBeing
 import network.Response
 
-/**
- * Выводит значения поля [models.HumanBeing.minutesOfWaiting] в порядке убывания.
- */
 @Serializable
-class PrintDescendingMinutesCommand(@Contextual private val manager: CollectionManager) : Command {
+class PrintDescendingMinutesCommand(@Contextual private val repository: Repository) : Command {
     override val name = "print_field_descending_minutes_of_waiting"
     override val description = "вывести minutesOfWaiting в порядке убывания"
     override val type = CommandType.SIMPLE
     override val args = listOf(CommandArgType.NONE)
 
     override fun execute(args: List<String>, humanBeing: HumanBeing?, userId: String): Response {
-        val values = manager.getMinutesOfWaitingDescending()
+        val values = repository.getMinutesOfWaitingDescending()
         return if (values.isEmpty()) Response(true, "Коллекция пуста.")
         else Response(true, values.joinToString("\n"))
     }

server/src/main/kotlin/commands/RemoveByIdCommand.kt

@@ -1,6 +1,5 @@
 package commands
 
-import collection.CollectionManager
 import database.Repository
 import kotlinx.serialization.Contextual
 import kotlinx.serialization.Serializable
@@ -10,7 +9,6 @@ import network.Response
 
 @Serializable
 class RemoveByIdCommand(
-    @Contextual private val manager: CollectionManager,
     @Contextual private val repository: Repository
 ) : Command {
     override val name = "remove_by_id"
@@ -27,17 +25,16 @@ class RemoveByIdCommand(
             return Response(false, "[Ошибка] Некорректный UUID: '${args[0]}'")
         }
 
-        val existing = manager.getById(id)
+        val existing = repository.getById(id)
             ?: return Response(false, "Элемент не найден.")
 
         if (existing.ownerId.toString() != userId)
             return Response(false, "Нет прав: объект принадлежит другому пользователю.")
 
-        if (repository.delete(id)) {
-            manager.removeById(id)
-            return Response(true, "Элемент удалён.")
+        return if (repository.delete(id)) {
+            Response(true, "Элемент удалён.")
         } else {
-            return Response(false, "[Ошибка] Элемент с id '$id' не найден и не был удалён.")
+            Response(false, "[Ошибка] Элемент с id '$id' не найден и не был удалён.")
         }
     }
 }

server/src/main/kotlin/commands/ShowCommand.kt

@@ -1,20 +1,21 @@
 package commands
 
-import collection.CollectionManager
+import database.Repository
 import kotlinx.serialization.Contextual
 import kotlinx.serialization.Serializable
 import models.HumanBeing
 import network.Response
 
 @Serializable
-class ShowCommand(@Contextual private val manager: CollectionManager) : Command {
+class ShowCommand(@Contextual private val repository: Repository) : Command {
     override val name = "show"
     override val description = "вывести все элементы коллекции"
     override val type = CommandType.SIMPLE
     override val args = listOf(CommandArgType.NONE)
 
     override fun execute(args: List<String>, humanBeing: HumanBeing?, userId: String): Response {
-        if (manager.isEmpty()) return Response(true, "Коллекция пуста.")
-        return Response(true, manager.getAll().joinToString("\n") { it.toString() })
+        val all = repository.getAll()
+        if (all.isEmpty()) return Response(true, "Коллекция пуста.")
+        return Response(true, all.joinToString("\n") { it.toString() })
     }
 }

server/src/main/kotlin/commands/SumOfMinutesCommand.kt

@@ -1,21 +1,18 @@
 package commands
 
-import collection.CollectionManager
+import database.Repository
 import kotlinx.serialization.Contextual
 import kotlinx.serialization.Serializable
 import models.HumanBeing
 import network.Response
 
-/**
- * Выводит сумму значений поля [models.HumanBeing.minutesOfWaiting].
- */
 @Serializable
-class SumOfMinutesCommand(@Contextual private val manager: CollectionManager) : Command {
+class SumOfMinutesCommand(@Contextual private val repository: Repository) : Command {
     override val name = "sum_of_minutes_of_waiting"
     override val description = "вывести сумму minutesOfWaiting всех элементов"
     override val type = CommandType.SIMPLE
     override val args = listOf(CommandArgType.NONE)
 
     override fun execute(args: List<String>, humanBeing: HumanBeing?, userId: String): Response =
-        Response(true, "Сумма minutesOfWaiting: ${manager.sumOfMinutesOfWaiting()}")
+        Response(true, "Сумма minutesOfWaiting: ${repository.sumOfMinutesOfWaiting()}")
 }

server/src/main/kotlin/commands/UpdateCommand.kt

@@ -1,6 +1,5 @@
 package commands
 
-import collection.CollectionManager
 import database.Repository
 import kotlinx.serialization.Contextual
 import kotlinx.serialization.Serializable
@@ -10,7 +9,6 @@ import java.util.UUID
 
 @Serializable
 class UpdateCommand(
-    @Contextual private val manager: CollectionManager,
     @Contextual private val repository: Repository
 ) : Command {
     override val name = "update"
@@ -28,17 +26,16 @@ class UpdateCommand(
             return Response(false, "[Ошибка] Некорректный UUID: '${args[0]}'")
         }
 
-        val existing = manager.getById(id)
+        val existing = repository.getById(id)
             ?: return Response(false, "Элемент не найден.")
 
         if (existing.ownerId.toString() != userId)
             return Response(false, "Нет прав: объект принадлежит другому пользователю.")
 
-        if (repository.update(id, humanBeing)) {
-            manager.update(id, humanBeing)
-            return Response(true, "Элемент обновлён.")
+        return if (repository.update(id, humanBeing)) {
+            Response(true, "Элемент обновлён.")
         } else {
-            return Response(false, "[Ошибка] Элемент не найден и не был обновлён.")
+            Response(false, "[Ошибка] Элемент не найден и не был обновлён.")
         }
     }
 }

server/src/main/kotlin/database/CacheInvalidator.kt

@@ -1,57 +0,0 @@
-package database
-
-import io.github.oshai.kotlinlogging.KotlinLogging
-import org.postgresql.PGConnection
-import javax.sql.DataSource
-
-private val logger = KotlinLogging.logger {}
-
-class CacheInvalidator(
-    private val dataSource: DataSource,
-    private val onInvalidated: () -> Unit
-) {
-    @Volatile
-    private var running = false
-    private var thread: Thread? = null
-
-    fun start() {
-        running = true
-        thread = Thread {
-            while (running) {
-                try {
-                    dataSource.connection.use { conn ->
-                        conn.autoCommit = true
-                        val pgConn = conn.unwrap(PGConnection::class.java)
-
-                        conn.createStatement().use { stmt ->
-                            stmt.execute("LISTEN cache_changed")
-                        }
-
-                        logger.info { "Listening for cache changes via PG NOTIFY..." }
-
-                        while (running && !conn.isClosed) {
-                            val notifications = pgConn.notifications
-                            if (notifications != null && notifications.isNotEmpty()) {
-                                logger.debug { "Cache invalidation received" }
-                                onInvalidated()
-                            }
-                            Thread.sleep(500)
-                        }
-                    }
-                } catch (e: Exception) {
-                    if (!running) break
-                    logger.warn(e) { "Cache listener error, reconnecting in 5s..." }
-                    Thread.sleep(5000)
-                }
-            }
-        }.also { it.isDaemon = true }.apply {
-            name = "pg-notify-listener"
-            start()
-        }
-    }
-
-    fun stop() {
-        running = false
-        thread?.interrupt()
-    }
-}

server/src/main/kotlin/database/Repository.kt

@@ -12,6 +12,7 @@ import models.HumanBeing
 import org.jetbrains.exposed.v1.core.*
 import org.jetbrains.exposed.v1.jdbc.*
 import org.jetbrains.exposed.v1.jdbc.transactions.transaction
+import java.time.LocalDate
 import java.util.UUID
 
 private val logger = KotlinLogging.logger {}
@@ -19,48 +20,54 @@ private val logger = KotlinLogging.logger {}
 class Repository(
     private val jwtManager: JWTManager,
 ) {
+    val initDate: LocalDate = LocalDate.now()
 
-    fun read(): List<HumanBeing> {
+    fun getAll(): List<HumanBeing> {
         val beings = mutableListOf<HumanBeing>()
         transaction {
-            val humans = HumanBeingTable
-                .selectAll()
-
+            val humans = HumanBeingTable.selectAll()
             for (human in humans) {
-                logger.trace { "read. $human" }
+                logger.trace { "getAll. $human" }
                 val cord = CoordinatesTable
                     .select(CoordinatesTable.x, CoordinatesTable.y)
                     .where(CoordinatesTable.id eq human[HumanBeingTable.coordinates])
                     .single()
-
                 val car = CarTable
                     .select(CarTable.cool)
                     .where(CarTable.id eq human[HumanBeingTable.car])
                     .single()
-
-                val newCords = Coordinates(cord[CoordinatesTable.x]!!, cord[CoordinatesTable.y]!!)
-                val newCar = Car(car[CarTable.cool]!!)
-                val newBeing = HumanBeing(
-                    name = human[HumanBeingTable.name],
-                    ownerId = human[HumanBeingTable.owner_id].value,
-                    coordinates = newCords,
-                    car = newCar,
-                    id = human[HumanBeingTable.id].value,
-                    creationDate = human[HumanBeingTable.creationDate],
-                    realHero = human[HumanBeingTable.realHero],
-                    hasToothpick = human[HumanBeingTable.hasToothpick],
-                    impactSpeed = human[HumanBeingTable.impactSpeed],
-                    soundtrackName = human[HumanBeingTable.soundtrackName],
-                    minutesOfWaiting = human[HumanBeingTable.minutesOfWaiting],
-                    weaponType = human[HumanBeingTable.weaponType]
-                )
-
-                beings.add(newBeing)
+                beings.add(toHumanBeing(human, cord, car))
             }
         }
         return beings
     }
 
+    fun getById(id: UUID): HumanBeing? = getAll().firstOrNull { it.id == id }
+
+    fun getMax(): HumanBeing? = getAll().maxWithOrNull(Comparator.naturalOrder())
+
+    fun getMin(): HumanBeing? = getAll().minWithOrNull(Comparator.naturalOrder())
+
+    fun sumOfMinutesOfWaiting(): Double =
+        getAll().sumOf { it.minutesOfWaiting.toDouble() }
+
+    fun minByName(): HumanBeing? = getAll().minByOrNull { it.name }
+
+    fun getMinutesOfWaitingDescending(): List<Float> =
+        getAll().map { it.minutesOfWaiting }.sortedDescending()
+
+    fun size(): Int = getAll().size
+
+    fun isEmpty(): Boolean = getAll().isEmpty()
+
+    fun getInfo(): String =
+        """
+         |Тип коллекции : Реляционная БД (PostgreSQL)
+         |Тип элементов : ${HumanBeing::class.simpleName}
+         |Дата инициал. : $initDate
+         |Кол-во элемен.: ${size()}
+         """.trimMargin()
+
     fun write(item: HumanBeing): UUID? {
         var humanId: UUID? = null
         try {
@@ -69,11 +76,9 @@ class Repository(
                     it[x] = item.coordinates.x
                     it[y] = item.coordinates.y
                 }
-
                 val cars = CarTable.insertAndGetId {
                     it[cool] = item.car.cool
                 }
-
                 humanId = HumanBeingTable.insertAndGetId {
                     it[owner_id] = item.ownerId
                     it[name] = item.name
@@ -87,9 +92,7 @@ class Repository(
                     it[car] = cars
                     it[weaponType] = item.weaponType
                 }.value
-                exec("NOTIFY cache_changed")
             }
-
         } catch (e: Exception) {
             logger.error(e) { "write failed. Here what's going on: \n $e \n " }
             return humanId
@@ -137,7 +140,6 @@ class Repository(
                     it[hasToothpick] = item.hasToothpick
                     it[weaponType] = item.weaponType
                 }
-                exec("NOTIFY cache_changed")
                 allGood = true
             }
         }
@@ -157,7 +159,6 @@ class Repository(
                     HumanBeingTable.deleteWhere { HumanBeingTable.id eq id }
                     CoordinatesTable.deleteWhere { CoordinatesTable.id eq refs[HumanBeingTable.coordinates] }
                     CarTable.deleteWhere { CarTable.id eq refs[HumanBeingTable.car] }
-                    exec("NOTIFY cache_changed")
                 } else {
                     allGood = false
                 }
@@ -221,8 +222,26 @@ class Repository(
             deletedCount = HumanBeingTable.deleteWhere { HumanBeingTable.owner_id eq ownerId }
             CoordinatesTable.deleteWhere { CoordinatesTable.id inList coordIds }
             CarTable.deleteWhere { CarTable.id inList carIds }
-            exec("NOTIFY cache_changed")
         }
         return deletedCount
     }
+
+    private fun toHumanBeing(
+        human: ResultRow,
+        cord: ResultRow,
+        car: ResultRow
+    ): HumanBeing = HumanBeing(
+        name = human[HumanBeingTable.name],
+        ownerId = human[HumanBeingTable.owner_id].value,
+        coordinates = Coordinates(cord[CoordinatesTable.x]!!, cord[CoordinatesTable.y]!!),
+        car = Car(car[CarTable.cool]!!),
+        id = human[HumanBeingTable.id].value,
+        creationDate = human[HumanBeingTable.creationDate],
+        realHero = human[HumanBeingTable.realHero],
+        hasToothpick = human[HumanBeingTable.hasToothpick],
+        impactSpeed = human[HumanBeingTable.impactSpeed],
+        soundtrackName = human[HumanBeingTable.soundtrackName],
+        minutesOfWaiting = human[HumanBeingTable.minutesOfWaiting],
+        weaponType = human[HumanBeingTable.weaponType]
+    )
 }