Возможность перезапускать лаунчсервер без потери сессий на клиентах

LaunchServer/src/main/java/ru/gravit/launchserver/auth/MySQLSourceConfig.java

@@ -20,7 +20,7 @@ public final class MySQLSourceConfig implements AutoCloseable {
             VerifyHelper.POSITIVE, "launcher.mysql.maxPoolSize can't be <= 0");
 
     // Instance
-    private final String poolName;
+    private  transient final String poolName;
 
     // Config
     private String address;
@@ -33,8 +33,8 @@ public final class MySQLSourceConfig implements AutoCloseable {
     private String timeZone;
 
     // Cache
-    private DataSource source;
-    private boolean hikari;
+    private transient DataSource source;
+    private transient boolean hikari;
 
 
     public MySQLSourceConfig(String poolName) {

LaunchServer/src/main/java/ru/gravit/launchserver/command/dump/DumpSessionsCommand.java

@@ -0,0 +1,51 @@
+package ru.gravit.launchserver.command.dump;
+
+import com.google.gson.reflect.TypeToken;
+import javafx.scene.media.MediaException;
+import ru.gravit.launcher.Launcher;
+import ru.gravit.launchserver.LaunchServer;
+import ru.gravit.launchserver.command.Command;
+import ru.gravit.launchserver.socket.Client;
+import ru.gravit.utils.helper.IOHelper;
+
+import java.io.Reader;
+import java.io.Writer;
+import java.lang.reflect.Type;
+import java.nio.file.Paths;
+import java.util.HashSet;
+import java.util.Set;
+
+public class DumpSessionsCommand extends Command {
+    public DumpSessionsCommand(LaunchServer server) {
+        super(server);
+    }
+
+    @Override
+    public String getArgsDescription() {
+        return "[load/unload] [filename]";
+    }
+
+    @Override
+    public String getUsageDescription() {
+        return "Load or unload sessions";
+    }
+
+    @Override
+    public void invoke(String... args) throws Exception {
+        verifyArgs(args,2);
+        if(args[0].equals("unload"))
+        {
+            try(Writer writer = IOHelper.newWriter(Paths.get(args[1])))
+            {
+                Launcher.gson.toJson(server.sessionManager.getSessions(),writer);
+            }
+        } else if(args[0].equals("load"))
+        {
+            try(Reader reader = IOHelper.newReader(Paths.get(args[1])))
+            {
+                Type setType = new TypeToken<HashSet<Client>>(){}.getType();
+                server.sessionManager.loadSessions(Launcher.gson.fromJson(reader,setType));
+            }
+        }
+    }
+}

LaunchServer/src/main/java/ru/gravit/launchserver/command/handler/CommandHandler.java

@@ -5,6 +5,7 @@
 import ru.gravit.launchserver.command.CommandException;
 import ru.gravit.launchserver.command.auth.*;
 import ru.gravit.launchserver.command.basic.*;
+import ru.gravit.launchserver.command.dump.DumpSessionsCommand;
 import ru.gravit.launchserver.command.hash.*;
 import ru.gravit.launchserver.command.modules.LoadModuleCommand;
 import ru.gravit.launchserver.command.modules.ModulesCommand;
@@ -102,6 +103,9 @@ protected CommandHandler(LaunchServer server) {
         registerCommand("uuidToUsername", new UUIDToUsernameCommand(server));
         registerCommand("ban", new BanCommand(server));
         registerCommand("unban", new UnbanCommand(server));
+
+        //Register dump commands
+        registerCommand("dumpSessions", new DumpSessionsCommand(server));
     }
 
 

LaunchServer/src/main/java/ru/gravit/launchserver/manangers/SessionManager.java

@@ -10,7 +10,7 @@ public class SessionManager implements NeedGarbageCollection {
 
     public static final long SESSION_TIMEOUT = 10 * 60 * 1000; // 10 минут
     public static final boolean NON_GARBAGE_SERVER = true;
-    private Set<Client> clientSet = new HashSet<>(128);
+    private HashSet<Client> clientSet = new HashSet<>(128);
 
 
     public boolean addClient(Client client) {
@@ -52,4 +52,12 @@ public void updateClient(long session) {
         Client newClient = new Client(session);
         clientSet.add(newClient);
     }
+    public Set<Client> getSessions()
+    {
+        return clientSet;
+    }
+    public void loadSessions(Set<Client> set)
+    {
+        clientSet.addAll(set);
+    }
 }

Launcher/src/main/java/ru/gravit/launcher/LauncherEngine.java

@@ -132,6 +132,7 @@ public static void main(String... args) throws Throwable {
         LogHelper.printLicense("Launcher");
         // Start Launcher
         initGson();
+        LogHelper.setStacktraceEnabled(true);
         Instant start = Instant.now();
         try {
             new LauncherEngine().start(args);