Added third example.
Vladimir Protsenko
5 years ago
parent
85af3e7611
commit
19295bf552
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## Запуск сервера
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```
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python server.py 8080
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```
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## Запуск клиента
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```
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python main.py
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```
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*.iml
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*.ipr
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*.iws
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.idea
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out
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target
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*.class
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name := "ConsoleChat"
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version := "0.1"
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scalaVersion := "2.13.3"
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// https://mvnrepository.com/artifact/com.github.java-json-tools/json-schema-validator
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libraryDependencies += "com.github.java-json-tools" % "json-schema-validator" % "2.2.14"
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libraryDependencies += "com.fasterxml.jackson.module" %% "jackson-module-scala" % "2.11.0"
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libraryDependencies += "com.typesafe.scala-logging" %% "scala-logging" % "3.9.2"
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libraryDependencies += "ch.qos.logback" % "logback-classic" % "1.2.3"
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libraryDependencies += "org.scalatest" %% "scalatest" % "3.0.8" % Test
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sbt.version = 1.3.13
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{
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"$schema": "http://json-schema.org/draft/2019-09/schema#",
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"$id": "http://mychat.germanywestcentral.cloudapp.azure.com/schemas/v0.0.1/ClientStateSchema.json",
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"title": "ClientState",
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"type": "object",
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"properties": {
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"lastMessageTimestamp": {
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"type": "string"
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}
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},
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"required": [
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"lastMessageTimestamp"
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]
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}
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@ -0,0 +1,173 @@
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package client
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import java.io.{BufferedReader, IOException, InputStreamReader}
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import java.net.{InetSocketAddress, SocketAddress}
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import java.nio.channels.{NonReadableChannelException, NotYetConnectedException, SelectionKey, Selector, SocketChannel}
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import ch.qos.logback.classic.Level
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import com.typesafe.scalalogging.{LazyLogging, Logger}
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import datatypes.{ClientInfo, Message}
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import org.slf4j.LoggerFactory
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import ch.qos.logback.classic.Level
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import com.fasterxml.jackson.core.JsonProcessingException
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import com.fasterxml.jackson.databind.exc.MismatchedInputException
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import com.sun.mail.util.SocketConnectException
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import scala.collection.immutable.ArraySeq
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import scala.collection.mutable
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import scala.jdk.CollectionConverters._
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import scala.reflect.ClassTag
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class Client(host:String,
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port:Int,
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recieveCallback: Message=>Unit,
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login:String
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) extends Runnable with LazyLogging {
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@volatile var isRunning = false
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private val selector = Selector.open()
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private var clientChannel: SocketChannel = _
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private val inbox = mutable.ArrayDeque[Message]()
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private var isInitialized = false
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def start(): Unit = {
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isRunning = true
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Runtime.getRuntime.addShutdownHook(new Thread() {
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override def run(): Unit = {
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Thread.currentThread().setName("CLEANER")
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if (isRunning) {
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logger.info("Closing connection.")
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isRunning = false
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Thread.sleep(10)
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if (clientChannel != null) clientChannel.close()
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}
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}
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})
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val clientThread = new Thread(this, "CLIENT")
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clientThread.start()
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}
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def leaveMessage(receiverId:String, body: String): Selector = {
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val msg = Message(senderId = this.login, receiverId = receiverId, body = body)
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inbox.addOne(msg)
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clientChannel.register(selector, SelectionKey.OP_WRITE)
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selector.wakeup()
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}
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def run (): Unit = {
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clientChannel = SocketChannel.open()
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try {
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clientChannel.connect(new InetSocketAddress(host, port))
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logger.info(s"Connected to $host:$port")
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} catch {
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case e: SocketConnectException =>
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logger.info("Connection failed.")
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System.exit(0)
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}
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clientChannel.configureBlocking(false)
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clientChannel.register(selector, SelectionKey.OP_WRITE)
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sendRecieveLoop()
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}
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private def sendRecieveLoop() = {
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while (isRunning) {
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selector.select()
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for (key <- selector.selectedKeys().asScala) {
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if (key.isValid && key.isReadable) {
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receiveFromServer()
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}
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if (key.isValid && key.isWritable) {
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sendToServer()
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}
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}
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}
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}
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private def sendToServer() = {
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if (!isInitialized) {
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val clientInfo = ClientInfo(login = login)
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send[ClientInfo](clientInfo)
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isInitialized = true
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}
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if (isInitialized && inbox.nonEmpty) {
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try {
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val msg = inbox.removeHead()
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send(msg)
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} catch {
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case e@(_: MismatchedInputException |
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_: IOException) =>
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logger.info(s"Client disconnected.")
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System.exit(0)
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case e@(_: NotYetConnectedException |
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_: NonReadableChannelException |
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_: JsonProcessingException) =>
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logger.error(e.getMessage)
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}
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}
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}
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private def send[T](msg: T)(implicit ct: ClassTag[T]) = {
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util.Util.send[T](msg, clientChannel)
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clientChannel.register(selector, SelectionKey.OP_READ)
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}
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private def receiveFromServer() = {
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try {
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val msg = util.Util.recieve[Message](clientChannel)
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if (msg.nonEmpty) {
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recieveCallback(msg.get)
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}
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} catch {
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case e@(_: MismatchedInputException |
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_: IOException) =>
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logger.info(s"Client disconnected.")
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System.exit(0)
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case e@(_: NotYetConnectedException |
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_: NonReadableChannelException |
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_: JsonProcessingException) =>
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logger.error(e.getMessage)
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}
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}
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}
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object Client extends LazyLogging {
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LoggerFactory.getLogger(org.slf4j.Logger.ROOT_LOGGER_NAME).asInstanceOf[ch.qos.logback.classic.Logger].setLevel(Level.INFO)
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val defaultArgs = Map(
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"host" -> "0.0.0.0",
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"port" -> "10000"
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)
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def uiLoop(client: Client): Unit = {
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Thread.currentThread().setName("UI")
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val consoleInput = new BufferedReader(new InputStreamReader(System.in))
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while(client.isRunning) {
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val line = consoleInput.readLine()
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if (line != null) {
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client.leaveMessage(util.Util.BROADCAST_RECIEVER_ID, line)
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}
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}
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}
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def main(args:Array[String]): Unit = {
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val argsMap = args.toSeq.sliding(2,2).map{ case ArraySeq(k,v) => (k.replace("--",""), v) }.toMap
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.withDefault(defaultArgs)
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val host = argsMap("host")
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val port = argsMap("port").toInt
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val login = argsMap.getOrElse("login", util.Util.genId(java.time.Instant.now()))
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val client = new Client(
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host,
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port,
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message => println(s"${message.senderId}: ${message.body}"),
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login = login)
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client.start()
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uiLoop(client)
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}
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}
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@ -0,0 +1,8 @@
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package datatypes
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import com.fasterxml.jackson.annotation.JsonProperty
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case class ClientInfo (
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@JsonProperty("timestamp") timestamp:String = java.time.Instant.now().toString,
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@JsonProperty("login") login:String
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)
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@ -0,0 +1,7 @@
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package datatypes
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import com.fasterxml.jackson.annotation.JsonProperty
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case class ClientState (
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@JsonProperty("lastMessageTimestamp") lastMessageTimestamp:String
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)
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@ -0,0 +1,10 @@
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package datatypes
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import com.fasterxml.jackson.annotation.JsonProperty
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case class Message(
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@JsonProperty("timestamp") timestamp:String = java.time.Instant.now().toString,
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@JsonProperty("senderId") senderId:String,
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@JsonProperty("receiverId") receiverId:String,
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@JsonProperty("body") body:String
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)
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@ -0,0 +1,36 @@
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package server
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import java.nio.channels.SocketChannel
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import java.nio.file.Path
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import com.typesafe.scalalogging.LazyLogging
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import datatypes.{ClientState, Message}
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import util.SavableState
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import scala.collection.mutable
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class Client(
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var login:String = "",
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var lastMessageTimestamp:String = "",
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val inbox:mutable.ArrayDeque[Message] = new mutable.ArrayDeque[Message](),
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val socketChannel:SocketChannel,
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var isInitialized:Boolean = false) extends SavableState with LazyLogging {
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private def getStateFilePath(statesDir:Path): Path = statesDir.resolve(s"${login}.json")
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def saveState(statesDir:Path):Unit = {
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val filePath = getStateFilePath(statesDir)
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val clientState = ClientState(lastMessageTimestamp = lastMessageTimestamp)
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util.Util.writeJsonToFile(clientState, filePath)
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logger.debug(s"Client $login state saved.")
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}
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def loadState(statesDir:Path):Unit = {
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val filePath = getStateFilePath(statesDir)
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val clientState = util.Util.readJsonFromFile[ClientState](filePath)
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if (clientState.nonEmpty) {
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lastMessageTimestamp = clientState.get.lastMessageTimestamp
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logger.debug(s"Client $login state loaded.")
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}
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}
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}
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@ -0,0 +1,220 @@
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package server
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import java.io.IOException
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import java.net.{InetAddress, InetSocketAddress, ServerSocket, Socket, SocketAddress, SocketOption}
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import java.nio.ByteBuffer
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import java.nio.channels.{NonReadableChannelException, NotYetConnectedException, SelectionKey, Selector, ServerSocketChannel, SocketChannel}
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import java.nio.file.{Files, Path}
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import java.util.concurrent.{ConcurrentHashMap, Executor, Executors, TimeUnit}
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import ch.qos.logback.classic.Level
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import com.fasterxml.jackson.core.JsonProcessingException
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import com.fasterxml.jackson.databind.exc.MismatchedInputException
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import com.typesafe.scalalogging.LazyLogging
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import datatypes.{ClientInfo, Message}
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import org.slf4j.LoggerFactory
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import scala.collection.immutable.ArraySeq
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import scala.collection.mutable
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import scala.jdk.CollectionConverters._
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class Server(host:String, port:Int, val savedStatesDir:Path) extends Runnable with LazyLogging {
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private val connectedClients = new mutable.HashMap[Int, Client]()
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private val loggedinClients = new mutable.HashMap[String, Client]()
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private val selector = Selector.open()
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@volatile var isRunning = false
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def run(): Unit = {
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logger.info(s"Server is running on $host:$port.")
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val serverSocketChannel = ServerSocketChannel.open()
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serverSocketChannel.bind(new InetSocketAddress(host, port))
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serverSocketChannel.configureBlocking(false)
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serverSocketChannel.register(selector, SelectionKey.OP_ACCEPT)
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sendRecieveAcceptLoop(serverSocketChannel)
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}
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private def sendRecieveAcceptLoop(serverSocketChannel: ServerSocketChannel) = {
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while (isRunning) {
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selector.select()
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for (key <- selector.selectedKeys().asScala) {
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if (key.isValid && key.isAcceptable)
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acceptNewClient(serverSocketChannel)
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if (key.isValid && key.isReadable)
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receiveClientData(key)
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if (key.isValid && key.isWritable)
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sendDataToClient(key)
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}
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}
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}
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private def acceptNewClient(serverSocketChannel: ServerSocketChannel) = {
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val clientChannel = serverSocketChannel.accept()
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if (clientChannel != null) {
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clientChannel.configureBlocking(false)
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clientChannel.register(selector, SelectionKey.OP_READ)
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val clientId = clientChannel.hashCode()
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val client = new Client(socketChannel = clientChannel)
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connectedClients.put(clientId, client)
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logger.debug(s"Connection accepted.")
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}
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}
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private def receiveClientData(key: SelectionKey) = {
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val clientChannel = key.channel().asInstanceOf[SocketChannel]
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val clientId = clientChannel.hashCode()
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val client = connectedClients(clientId)
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try {
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if (!client.isInitialized) {
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val clientInfo = util.Util.recieve[ClientInfo](clientChannel)
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if (clientInfo.nonEmpty) {
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loginClient(client, clientInfo)
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} else {
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throw new java.io.IOException("Bad client info. Initialization aborted.")
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}
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} else {
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val msg = util.Util.recieve[Message](clientChannel)
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if (msg.nonEmpty) {
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client.lastMessageTimestamp = msg.get.timestamp
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client.saveState(savedStatesDir)
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routeMessage(msg.get, clientId)
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}
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}
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} catch {
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case e @ (_: com.fasterxml.jackson.databind.exc.MismatchedInputException |
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_: java.io.IOException ) =>
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logger.error(e.getMessage, e.getCause)
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handleDisconnection(clientChannel, clientId)
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case e @ (_ : java.nio.channels.NotYetConnectedException |
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_ : java.nio.channels.NonReadableChannelException |
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_ : com.fasterxml.jackson.core.JsonProcessingException) =>
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logger.error(e.getMessage, e.getCause)
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}
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}
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private def loginClient(client: Client, clientInfo: Option[ClientInfo]) = {
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val login = clientInfo.get.login
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if (loggedinClients.keySet.contains(login)) {
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val msg = Message(body=s"$login is already connected.", receiverId = "", senderId = "SERVER")
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leaveMessageForClient(msg, client)
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} else {
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loggedinClients.put(clientInfo.get.login, client)
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client.login = clientInfo.get.login
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client.loadState(savedStatesDir)
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client.isInitialized = true
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val msg = if ("".equals(client.lastMessageTimestamp)) {
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Message(body = s"Hello new client with login ${client.login} !", receiverId = "", senderId = "SERVER")
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} else {
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Message(body = s"Welcome back ${client.login} !", receiverId = "", senderId = "SERVER")
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}
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leaveMessageForClient(msg, client)
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logger.info(s"Client ${client.login} logged in.")
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}
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}
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private def handleDisconnection(clientChannel: SocketChannel, clientId: Int) = {
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clientChannel.close()
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val disconnectedClient = connectedClients.remove(clientId)
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if (disconnectedClient.nonEmpty) {
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loggedinClients.remove(disconnectedClient.get.login)
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val msg = Message(body = s"Client ${disconnectedClient.get.login} left.", receiverId = "", senderId = "SERVER")
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leaveMessageForConnectedClients(msg)
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}
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logger.info(s"Client ${disconnectedClient.get.login} disconnected.")
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}
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private def sendDataToClient(key: SelectionKey) = {
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val clientChannel = key.channel().asInstanceOf[SocketChannel]
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val clientId = clientChannel.hashCode()
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val client = connectedClients(clientId)
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val clientInbox = client.inbox
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if (clientInbox.nonEmpty)
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try {
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val messageToSend = clientInbox.removeHead()
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client.lastMessageTimestamp = messageToSend.timestamp
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client.saveState(savedStatesDir)
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util.Util.send(messageToSend, clientChannel)
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clientChannel.register(selector, SelectionKey.OP_READ)
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} catch {
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case e@(_: MismatchedInputException |
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_: IOException) =>
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handleDisconnection(clientChannel, clientId)
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case e@(_: NotYetConnectedException |
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_: NonReadableChannelException |
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_: JsonProcessingException) =>
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logger.error(e.getMessage, e.getCause)
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}
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}
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private def routeMessage(msg: Message, senderId:Int) = {
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msg.receiverId match {
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case _ =>
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for ((recieverId, reciever) <- connectedClients.iterator) {
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if (recieverId != senderId) {
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leaveMessageForClient(msg, reciever)
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}
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}
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}
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}
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private def leaveMessageForConnectedClients(msg:Message) = {
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for ((recieverId, reciever) <- connectedClients.iterator)
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leaveMessageForClient(msg, reciever)
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}
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private def leaveMessageForClient(msg: Message, reciever: Client) = {
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reciever.inbox.addOne(msg)
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reciever.socketChannel.register(selector, SelectionKey.OP_WRITE)
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}
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def start(): Unit = {
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isRunning = true
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Runtime.getRuntime.addShutdownHook(new Thread() {
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override def run(): Unit = {
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if (isRunning) {
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logger.info("Closing connections.")
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isRunning = false
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Thread.sleep(10)
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for (c <- connectedClients.values) {
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try c.socketChannel.close()
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}
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}
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}
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})
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this.run()
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}
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}
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object Server extends LazyLogging {
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LoggerFactory.getLogger(org.slf4j.Logger.ROOT_LOGGER_NAME).asInstanceOf[ch.qos.logback.classic.Logger].setLevel(Level.DEBUG)
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val defaultArgs = Map(
|
||||
"host" -> "0.0.0.0",
|
||||
"port" -> "10000",
|
||||
"states_path" -> "./clientStates/"
|
||||
)
|
||||
|
||||
// how socket connection and key.isConnectable are related?
|
||||
// how socket connection and socket.isConnected are related?
|
||||
def main(args:Array[String]): Unit = {
|
||||
val argsMap = args.toSeq.sliding(2,2).map{ case ArraySeq(k,v) => (k.replace("--",""), v) }.toMap
|
||||
.withDefault(defaultArgs)
|
||||
val host = argsMap("host")
|
||||
val port = argsMap("port").toInt
|
||||
val statesPath = Path.of(argsMap("statesPath")).toAbsolutePath
|
||||
|
||||
if (Files.notExists(statesPath)) {
|
||||
logger.info(s"Path statesPath = ${statesPath} does not exist. Aborting.")
|
||||
System.exit(0)
|
||||
}
|
||||
|
||||
logger.info(s"Using ${statesPath} for client states.")
|
||||
|
||||
val server = new Server(host, port, statesPath)
|
||||
server.start()
|
||||
}
|
||||
}
|
||||
@ -0,0 +1,8 @@
|
||||
package util
|
||||
|
||||
import java.nio.file.Path
|
||||
|
||||
trait SavableState {
|
||||
def loadState(statesDir:Path):Unit
|
||||
def saveState(statesDir:Path):Unit
|
||||
}
|
||||
@ -0,0 +1,81 @@
|
||||
package util
|
||||
|
||||
import java.nio.ByteBuffer
|
||||
import java.nio.channels.SocketChannel
|
||||
import java.nio.charset.{Charset, StandardCharsets}
|
||||
import java.nio.file.{Files, Path, StandardOpenOption}
|
||||
import java.security.MessageDigest
|
||||
|
||||
import com.fasterxml.jackson.databind.ObjectMapper
|
||||
import com.fasterxml.jackson.module.scala.{DefaultScalaModule, ScalaObjectMapper}
|
||||
import com.typesafe.scalalogging.LazyLogging
|
||||
|
||||
import scala.collection.mutable
|
||||
import scala.reflect.ClassTag
|
||||
|
||||
object Util extends LazyLogging {
|
||||
val BUFFER_SIZE = 1024
|
||||
val ID_LIMIT = 2
|
||||
val BROADCAST_RECIEVER_ID = "-1"
|
||||
|
||||
private val objectMapper = new ObjectMapper() with ScalaObjectMapper
|
||||
objectMapper.registerModule(DefaultScalaModule)
|
||||
private val charset = Charset.forName( "utf-8" )
|
||||
private val decoder = charset.newDecoder
|
||||
|
||||
def recieveString(socketChannel:SocketChannel) : String = {
|
||||
val stringBuilder = new mutable.StringBuilder()
|
||||
val buffer = ByteBuffer.allocateDirect(BUFFER_SIZE)
|
||||
while (true) {
|
||||
val readBytes = socketChannel.read(buffer)
|
||||
if ((readBytes == 0) || (readBytes == -1))
|
||||
return stringBuilder.mkString
|
||||
buffer.flip()
|
||||
val charBuffer = decoder.decode( buffer )
|
||||
stringBuilder.appendAll(charBuffer.array())
|
||||
}
|
||||
""
|
||||
}
|
||||
|
||||
def sendString(str: String, socketChannel:SocketChannel): Unit = {
|
||||
logger.debug(s"Send: $str")
|
||||
val buffer = ByteBuffer.wrap(str.getBytes())
|
||||
socketChannel.write(buffer)
|
||||
}
|
||||
|
||||
def recieve[T](sc:SocketChannel)(implicit ct: ClassTag[T]): Option[T] = {
|
||||
val raw = recieveString(sc)
|
||||
if ("".equals(raw)) return None
|
||||
val v = objectMapper.readerFor(ct.runtimeClass).readValue[T](raw)
|
||||
logger.debug(s"Recieve: ${v.toString}")
|
||||
Some(v)
|
||||
}
|
||||
|
||||
def send[T](x:T, sc:SocketChannel)(implicit ct: ClassTag[T]): Unit =
|
||||
sendString(objectMapper.writerFor(ct.runtimeClass).writeValueAsString(x), sc)
|
||||
|
||||
def genId(s: Any): String = {
|
||||
val md5 = java.security.MessageDigest.getInstance("MD5").digest(s.toString.getBytes)
|
||||
md5.map("%02X" format _).take(ID_LIMIT).mkString
|
||||
}
|
||||
|
||||
def writeJsonToFile[T](x:T, file:Path)(implicit ct: ClassTag[T]) = {
|
||||
val json = objectMapper.writerFor(ct.runtimeClass).writeValueAsString(x)
|
||||
Files.writeString(
|
||||
file,
|
||||
json,
|
||||
StandardCharsets.UTF_8,
|
||||
StandardOpenOption.CREATE,
|
||||
StandardOpenOption.TRUNCATE_EXISTING)
|
||||
}
|
||||
|
||||
def readJsonFromFile[T](file:Path)(implicit ct: ClassTag[T]):Option[T] = {
|
||||
if (Files.exists(file)) {
|
||||
val json = Files.readString(file)
|
||||
val v = objectMapper.readerFor(ct.runtimeClass).readValue[T](json)
|
||||
Some(v)
|
||||
} else {
|
||||
None
|
||||
}
|
||||
}
|
||||
}
|
||||
@ -0,0 +1,26 @@
|
||||
import java.nio.file.Path
|
||||
|
||||
import com.github.fge.jackson.JsonLoader
|
||||
import com.github.fge.jsonschema.main.JsonSchemaFactory
|
||||
import datatypes.ClientState
|
||||
import org.scalatest.FunSuite
|
||||
|
||||
class SchemaCompliance extends FunSuite {
|
||||
test("checkClientStateSchemeCompliance") {
|
||||
val clientState = ClientState(lastMessageTimestamp = "2020-09-11T08:54:45.528807100Z")
|
||||
val clientStateFilePath = Path.of("./target/checkClientStateSchemeCompliance.json")
|
||||
val schemaPath = Path.of("./resources/schemas/v0.0.1/ClientStateSchema.json")
|
||||
|
||||
util.Util.writeJsonToFile(clientState, clientStateFilePath)
|
||||
val jsonToValidate = JsonLoader.fromFile(clientStateFilePath.toFile)
|
||||
|
||||
val sf = JsonSchemaFactory.byDefault()
|
||||
val schema = sf.getJsonSchema(JsonLoader.fromFile(schemaPath.toFile))
|
||||
|
||||
val report = schema.validate(jsonToValidate)
|
||||
println(report)
|
||||
|
||||
assert(report.isSuccess)
|
||||
}
|
||||
|
||||
}
|
||||
Loading…
Reference in New Issue