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Clean and fix

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This commit is contained in:
Fabrice Lecomte
2025-03-05 22:11:24 +01:00
parent d84e8359c9
commit 99f0760d3c
11 changed files with 110 additions and 92 deletions
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37
src/main/kotlin/eventDemo/app/command/GameCommandHandler.kt
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@@ -10,10 +10,15 @@ import eventDemo.app.entity.Player
import eventDemo.app.event.GameEventStream
import eventDemo.app.event.buildStateFromEventStream
import eventDemo.app.event.event.GameEvent
import eventDemo.libs.command.CommandBlock
import io.ktor.websocket.Frame
import kotlinx.coroutines.DelicateCoroutinesApi
import kotlinx.coroutines.GlobalScope
import kotlinx.coroutines.Job
import kotlinx.coroutines.channels.ReceiveChannel
import kotlinx.coroutines.channels.SendChannel
import kotlinx.coroutines.runBlocking
import kotlinx.coroutines.channels.trySendBlocking
import kotlinx.coroutines.launch
/**
* Listen [GameCommand] on [GameCommandStream], check the validity and execute an action.
@@ -22,21 +27,31 @@ import kotlinx.coroutines.runBlocking
*/
class GameCommandHandler(
private val eventStream: GameEventStream,
incoming: ReceiveChannel<Frame>,
outgoing: SendChannel<Frame>,
) {
private val commandStream = GameCommandStream(incoming, outgoing)
private val playerNotifier: (String) -> Unit = { runBlocking { outgoing.send(Frame.Text(it)) } }
/**
* Init the handler
*/
suspend fun init(player: Player) {
@OptIn(DelicateCoroutinesApi::class)
fun handle(
player: Player,
incoming: ReceiveChannel<Frame>,
outgoing: SendChannel<Frame>,
): Job {
val commandStream = GameCommandStream(incoming, outgoing)
val playerNotifier: (String) -> Unit = { outgoing.trySendBlocking(Frame.Text(it)) }
return GlobalScope.launch {
init(player, commandStream, playerNotifier)
}
}
private suspend fun init(
player: Player,
commandStream: GameCommandStream,
playerNotifier: (String) -> Unit,
) {
commandStream.process { command ->
if (command.payload.player.id != player.id) {
runBlocking {
nack()
}
nack()
}
val gameState = command.buildGameState()
@@ -47,7 +62,7 @@ class GameCommandHandler(
is IWantToJoinTheGameCommand -> command.run(gameState, playerNotifier, eventStream)
is ICantPlayCommand -> command.run(gameState, playerNotifier, eventStream)
}
}
} as CommandBlock<GameCommand>
}
private fun GameCommand.buildGameState(): GameState = payload.gameId.buildStateFromEventStream(eventStream)

13
src/main/kotlin/eventDemo/app/command/GameCommandRoute.kt
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@@ -1,8 +1,6 @@
package eventDemo.app.command
import eventDemo.app.entity.Player
import eventDemo.app.event.GameEventBus
import eventDemo.app.event.GameEventStream
import eventDemo.app.eventListener.GameEventPlayerNotificationListener
import io.ktor.server.application.ApplicationCall
import io.ktor.server.auth.authenticate
@@ -10,18 +8,15 @@ import io.ktor.server.auth.jwt.JWTPrincipal
import io.ktor.server.auth.principal
import io.ktor.server.routing.Route
import io.ktor.server.websocket.webSocket
import kotlinx.coroutines.launch
fun Route.gameSocket(
eventStream: GameEventStream,
eventBus: GameEventBus,
playerNotificationListener: GameEventPlayerNotificationListener,
commandHandler: GameCommandHandler,
) {
authenticate {
webSocket("/game") {
launch {
GameCommandHandler(eventStream, incoming, outgoing).init(call.getPlayer())
}
GameEventPlayerNotificationListener(eventBus, outgoing).init()
commandHandler.handle(call.getPlayer(), incoming, outgoing)
playerNotificationListener.startListening(outgoing)
}
}
}

9
src/main/kotlin/eventDemo/app/event/GameEventStream.kt
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@@ -2,18 +2,17 @@ package eventDemo.app.event
import eventDemo.app.entity.GameId
import eventDemo.app.event.event.GameEvent
import eventDemo.libs.event.EventBus
import eventDemo.libs.event.EventStream
/**
* A stream to publish and read the played card event.
*/
class GameEventStream(
private val eventBus: EventBus<GameEvent, GameId>,
private val m: EventStream<GameEvent, GameId>,
) : EventStream<GameEvent, GameId> by m {
private val eventBus: GameEventBus,
private val eventStream: EventStream<GameEvent, GameId>,
) : EventStream<GameEvent, GameId> by eventStream {
override fun publish(event: GameEvent) {
m.publish(event)
eventStream.publish(event)
eventBus.publish(event)
}
}

14
src/main/kotlin/eventDemo/app/eventListener/GameEventPlayerNotificationListener.kt
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@@ -1,22 +1,18 @@
package eventDemo.app.eventListener
import eventDemo.app.entity.GameId
import eventDemo.app.event.GameEventBus
import eventDemo.app.event.event.GameEvent
import eventDemo.libs.event.EventBus
import eventDemo.shared.toFrame
import io.ktor.websocket.Frame
import kotlinx.coroutines.channels.SendChannel
import kotlinx.coroutines.runBlocking
import kotlinx.coroutines.channels.trySendBlocking
class GameEventPlayerNotificationListener(
private val eventBus: EventBus<GameEvent, GameId>,
private val outgoing: SendChannel<Frame>,
private val eventBus: GameEventBus,
) {
fun init() {
fun startListening(outgoing: SendChannel<Frame>) {
eventBus.subscribe { event: GameEvent ->
runBlocking {
outgoing.send(event.toFrame())
}
outgoing.trySendBlocking(event.toFrame())
}
}
}

9
src/main/kotlin/eventDemo/app/eventListener/GameEventReactionListener.kt
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@@ -1,15 +1,14 @@
package eventDemo.app.eventListener
import eventDemo.app.entity.GameId
import eventDemo.app.event.GameEventBus
import eventDemo.app.event.GameEventStream
import eventDemo.app.event.buildStateFromEventStream
import eventDemo.app.event.event.GameEvent
import eventDemo.app.event.event.GameStartedEvent
import eventDemo.libs.event.EventBus
import eventDemo.libs.event.EventStream
class GameEventReactionListener(
private val eventBus: EventBus<GameEvent, GameId>,
private val eventStream: EventStream<GameEvent, GameId>,
private val eventBus: GameEventBus,
private val eventStream: GameEventStream,
) {
fun init() {
eventBus.subscribe { event: GameEvent ->

10
src/main/kotlin/eventDemo/configuration/ConfigureDI.kt
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@@ -1,11 +1,14 @@
package eventDemo.configuration
import eventDemo.app.command.GameCommandHandler
import eventDemo.app.event.GameEventBus
import eventDemo.app.event.GameEventStream
import eventDemo.app.eventListener.GameEventPlayerNotificationListener
import eventDemo.libs.event.EventBusInMemory
import eventDemo.libs.event.EventStreamInMemory
import io.ktor.server.application.Application
import io.ktor.server.application.install
import org.koin.core.module.dsl.singleOf
import org.koin.dsl.module
import org.koin.ktor.plugin.Koin
import org.koin.logger.slf4jLogger
@@ -19,10 +22,15 @@ fun Application.configureKoin() {
val appKoinModule =
module {
single {
GameEventBus(EventBusInMemory())
}
single {
GameEventStream(get(), EventStreamInMemory())
}
single {
GameEventBus(EventBusInMemory())
GameCommandHandler(get())
}
singleOf(::GameEventPlayerNotificationListener)
}

10
src/main/kotlin/eventDemo/configuration/ConfigureWebSocketsGameRoute.kt
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@@ -1,16 +1,16 @@
package eventDemo.configuration
import eventDemo.app.command.GameCommandHandler
import eventDemo.app.command.gameSocket
import eventDemo.app.event.GameEventBus
import eventDemo.app.event.GameEventStream
import eventDemo.app.eventListener.GameEventPlayerNotificationListener
import io.ktor.server.application.Application
import io.ktor.server.routing.routing
fun Application.declareWebSocketsGameRoute(
eventStream: GameEventStream,
eventBus: GameEventBus,
playerNotificationListener: GameEventPlayerNotificationListener,
commandHandler: GameCommandHandler,
) {
routing {
gameSocket(eventStream, eventBus)
gameSocket(playerNotificationListener, commandHandler)
}
}

14
src/main/kotlin/eventDemo/libs/command/CommandStream.kt
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@@ -1,5 +1,8 @@
package eventDemo.libs.command
import kotlinx.coroutines.DelicateCoroutinesApi
import kotlinx.coroutines.GlobalScope
import kotlinx.coroutines.launch
import kotlin.reflect.KClass
/**
@@ -11,7 +14,7 @@ interface CommandStream<C : Command> {
/**
* Send a new [Command] to the queue.
*/
suspend fun send(
fun send(
type: KClass<C>,
command: C,
)
@@ -19,7 +22,7 @@ interface CommandStream<C : Command> {
/**
* Send multiple [Command] to the queue.
*/
suspend fun send(
fun send(
type: KClass<C>,
vararg commands: C,
) {
@@ -39,6 +42,13 @@ interface CommandStream<C : Command> {
* Apply an action to all command income in the stream.
*/
suspend fun process(action: CommandBlock<C>)
@OptIn(DelicateCoroutinesApi::class)
fun blockAndProcess(action: CommandBlock<C>) {
GlobalScope.launch {
process(action)
}
}
}
suspend inline fun <reified C : Command> CommandStream<C>.send(vararg command: C) = send(C::class, *command)

49
src/main/kotlin/eventDemo/libs/command/CommandStreamChannel.kt
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@@ -3,10 +3,11 @@ package eventDemo.libs.command
import io.github.oshai.kotlinlogging.KotlinLogging
import io.ktor.websocket.Frame
import io.ktor.websocket.readText
import kotlinx.coroutines.GlobalScope
import kotlinx.coroutines.channels.ReceiveChannel
import kotlinx.coroutines.channels.SendChannel
import kotlinx.coroutines.launch
import kotlinx.coroutines.channels.onFailure
import kotlinx.coroutines.channels.onSuccess
import kotlinx.coroutines.channels.trySendBlocking
import kotlin.reflect.KClass
/**
@@ -19,23 +20,30 @@ class CommandStreamChannel<C : Command>(
private val deserializer: (String) -> C,
) : CommandStream<C> {
private val logger = KotlinLogging.logger {}
private val failedCommand = mutableListOf<C>()
/**
* Send a new [Command] to the queue.
*/
override suspend fun send(
override fun send(
type: KClass<C>,
command: C,
) {
outgoing.send(Frame.Text(serializer(command)))
logger.atInfo {
message = "Command published: $command"
payload = mapOf("command" to command)
}
outgoing
.trySendBlocking(Frame.Text(serializer(command)))
.onSuccess {
logger.atInfo {
message = "Command published: $command"
payload = mapOf("command" to command)
}
}.onFailure {
logger.atError {
message = "Command FAILED: $command"
payload = mapOf("command" to command)
}
}
}
override suspend fun process(action: CommandStream.ComputeStatus.(C) -> Unit) {
override suspend fun process(action: CommandBlock<C>) {
// incoming.consumeEach { commandAsFrame ->
// if (commandAsFrame is Frame.Text) {
// compute(deserializer(commandAsFrame.readText()), action)
@@ -50,7 +58,7 @@ class CommandStreamChannel<C : Command>(
private suspend fun compute(
command: C,
action: CommandStream.ComputeStatus.(C) -> Unit,
action: CommandBlock<C>,
) {
val status =
object : CommandStream.ComputeStatus {
@@ -67,12 +75,12 @@ class CommandStreamChannel<C : Command>(
}
}
val action = runCatching { status.action(command) }
if (action.isFailure) {
val actionResult = runCatching { status.action(command) }
if (actionResult.isFailure) {
logger.atInfo {
message = "Error"
message = "Error on compute the Command"
payload = mapOf("command" to command)
cause = action.exceptionOrNull()
cause = actionResult.exceptionOrNull()
}
markAsFailed(command)
} else if (!status.isSet) {
@@ -82,20 +90,17 @@ class CommandStreamChannel<C : Command>(
private suspend fun markAsSuccess(command: C) {
logger.atInfo {
message = "Compute command SUCCESS and it removed of the stack : $command"
message = "Compute command SUCCESS and it removed of the stack"
payload = mapOf("command" to command)
}
GlobalScope.launch {
// outgoing.send(Frame.Text("Command executed successfully"))
}
// outgoing.trySendBlocking(Frame.Text("Command executed successfully"))
}
private suspend fun markAsFailed(command: C) {
failedCommand.add(command)
logger.atWarn {
message = "Compute command FAILED and it put it ot the top of the stack : $command"
message = "Compute command FAILED"
payload = mapOf("command" to command)
}
outgoing.send(Frame.Text("Command execution failed"))
// outgoing.trySendBlocking(Frame.Text("Command execution failed"))
}
}

15
src/main/kotlin/eventDemo/libs/command/CommandStreamInMemory.kt
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@@ -3,9 +3,10 @@ package eventDemo.libs.command
import io.github.oshai.kotlinlogging.KotlinLogging
import kotlinx.coroutines.channels.Channel
import kotlinx.coroutines.channels.consumeEach
import kotlinx.coroutines.channels.trySendBlocking
import kotlin.reflect.KClass
typealias CommandBlock<C> = CommandStream.ComputeStatus.(C) -> Unit
typealias CommandBlock<C> = suspend CommandStream.ComputeStatus.(C) -> Unit
/**
* Manage [Command]'s
@@ -14,7 +15,6 @@ typealias CommandBlock<C> = CommandStream.ComputeStatus.(C) -> Unit
*/
abstract class CommandStreamInMemory<C : Command> : CommandStream<C> {
private val logger = KotlinLogging.logger {}
private val failedCommand = mutableListOf<Command>()
private val queue: Channel<C> =
Channel(onUndeliveredElement = {
logger.atWarn { "${it::class.simpleName} command not send" }
@@ -23,7 +23,7 @@ abstract class CommandStreamInMemory<C : Command> : CommandStream<C> {
/**
* Send a new [Command] to the queue.
*/
override suspend fun send(
override fun send(
type: KClass<C>,
command: C,
) {
@@ -31,7 +31,7 @@ abstract class CommandStreamInMemory<C : Command> : CommandStream<C> {
message = "Command published: $command"
payload = mapOf("command" to command)
}
queue.send(command)
queue.trySendBlocking(command)
}
override suspend fun process(action: CommandBlock<C>) {
@@ -43,7 +43,7 @@ abstract class CommandStreamInMemory<C : Command> : CommandStream<C> {
}
}
private fun compute(
private suspend fun compute(
command: C,
action: CommandBlock<C>,
) {
@@ -51,12 +51,12 @@ abstract class CommandStreamInMemory<C : Command> : CommandStream<C> {
object : CommandStream.ComputeStatus {
var isSet: Boolean = false
override fun ack() {
override suspend fun ack() {
if (!isSet) markAsSuccess(command) else error("Already NACK")
isSet = true
}
override fun nack() {
override suspend fun nack() {
if (!isSet) markAsFailed(command) else error("Already ACK")
isSet = true
}
@@ -77,7 +77,6 @@ abstract class CommandStreamInMemory<C : Command> : CommandStream<C> {
}
private fun <C : Command> markAsFailed(command: C) {
failedCommand.add(command)
logger.atWarn {
message = "Compute command FAILED and it put it ot the top of the stack : $command"
payload = mapOf("command" to command)