Close connection in job cancellation

build.gradle.kts

@@ -37,7 +37,7 @@ repositories {
 
 val tgBotVersion = "6.0.4"
 val retrofitVersion = "2.7.1"
-val plugDir = "MinecraftServers/spigot_1.17/plugins/"
+val plugDir = "MinecraftServers/spigot_1.16.5/plugins/"
 val homeDir = System.getProperty("user.home")
 
 tasks {

src/main/kotlin/org/kraftwerk28/spigot_tg_bridge/ApiService.kt

@@ -1,6 +1,7 @@
 package org.kraftwerk28.spigot_tg_bridge
 
 import com.google.gson.annotations.SerializedName as Name
+import retrofit2.Call
 import retrofit2.http.*
 
 interface TgApiService {
@@ -56,11 +57,11 @@ interface TgApiService {
     ): TgResponse<Message>
 
     @GET("getUpdates")
-    suspend fun getUpdates(
+    fun getUpdates(
         @Query("offset") offset: Long,
         @Query("limit") limit: Int = 100,
         @Query("timeout") timeout: Int = 0,
-    ): TgResponse<List<Update>>
+    ): Call<TgResponse<List<Update>>>
 
     @GET("getMe")
     suspend fun getMe(): TgResponse<User>

src/main/kotlin/org/kraftwerk28/spigot_tg_bridge/Plugin.kt

@@ -22,10 +22,12 @@ class Plugin : JavaPlugin() {
             return
 
         val cmdHandler = CommandHandler(this)
-        tgBot = TgBot(this, config)
+        loadBot()
+        tgBot?.let { bot ->
+            val eventHandler = EventHandler(bot, config)
+            server.pluginManager.registerEvents(eventHandler, this)
+        }
         getCommand(C.COMMANDS.PLUGIN_RELOAD)?.setExecutor(cmdHandler)
-        val eventHandler = EventHandler(tgBot!!, config)
-        server.pluginManager.registerEvents(eventHandler, this)
 
         // Notify Telegram groups about server start
         config.serverStartMessage?.let { message ->
@@ -34,6 +36,11 @@ class Plugin : JavaPlugin() {
         logger.info("Plugin started.")
     }
 
+    fun loadBot() {
+        tgBot?.let { it.stop() }
+        tgBot = TgBot(this, config)
+    }
+
     override fun onDisable() {
         if (!config.isEnabled) return
         config.serverStopMessage?.let {
@@ -55,8 +62,7 @@ class Plugin : JavaPlugin() {
     fun reload() {
         logger.info(C.INFO.reloading)
         config.reload(this)
-        tgBot?.stop()
-        tgBot = TgBot(this, config)
+        loadBot()
         logger.info(C.INFO.reloadComplete)
     }
 }

src/main/kotlin/org/kraftwerk28/spigot_tg_bridge/TgBot.kt

@@ -6,6 +6,7 @@ import kotlinx.coroutines.channels.*
 import okhttp3.OkHttpClient
 import okhttp3.logging.HttpLoggingInterceptor
 import retrofit2.Retrofit
+import retrofit2.Call
 import retrofit2.converter.gson.GsonConverterFactory
 import java.time.Duration
 
@@ -32,13 +33,8 @@ class TgBot(
     }
 
     init {
-        val interceptor = HttpLoggingInterceptor().apply {
-            level = HttpLoggingInterceptor.Level.NONE;
-        }
-
         client = OkHttpClient
             .Builder()
-            .addInterceptor(interceptor)
             .readTimeout(Duration.ZERO)
             .build();
 
@@ -65,40 +61,45 @@ class TgBot(
             api.setMyCommands(commands)
         }
 
-        pollJob = scope.launch {
-            try {
-                while (true) {
-                    try {
-                        pollUpdates()
-                    } catch (e: Exception) {
-                        e.printStackTrace()
+        pollJob = initPolling()
+        handlerJob = initHandler()
+    }
+
+    private fun initPolling() = scope.launch {
+        var request:
+            Call<TgApiService.TgResponse<List<TgApiService.Update>>>? = null
+        try {
+            while (true) {
+                try {
+                    request = api.getUpdates(
+                        offset = currentOffset,
+                        timeout = pollTimeout,
+                    )
+                    val response = request.execute().body()
+                    response?.result?.let { updates ->
+                        if (!updates.isEmpty()) {
+                            updates.forEach { updateChan.send(it) }
+                            currentOffset = updates.last().updateId + 1
+                        }
                     }
+                } catch (e: Exception) {
+                    e.printStackTrace()
                 }
-            } catch (e: CancellationException) {}
-        }
-
-        handlerJob = scope.launch {
-            try {
-                while (true) {
-                    handleUpdate()
-                }
-            } catch (e: CancellationException) {}
-        }
-    }
-
-    private suspend fun pollUpdates() {
-        val updatesResponse = api
-            .getUpdates(offset = currentOffset, timeout = pollTimeout)
-        updatesResponse.result?.let { updates ->
-            if (!updates.isEmpty()) {
-                updates.forEach { updateChan.send(it) }
-                currentOffset = updates.last().updateId + 1
             }
+        } catch (e: CancellationException) {
+            request?.cancel()
         }
     }
 
-    private suspend fun handleUpdate() {
-        val update = updateChan.receive()
+    private fun initHandler() = scope.launch {
+        try {
+            while (true) {
+                handleUpdate(updateChan.receive())
+            }
+        } catch (e: CancellationException) {}
+    }
+
+    suspend fun handleUpdate(update: TgApiService.Update) {
         update.message?.text?.let {
             commandRegex.matchEntire(it)?.groupValues?.let {
                 commandMap[it[1]]?.let { it(update) }