Fix FileAlreadyExistsException for sym linked folders

bukkit/src/main/java/com/github/games647/fastlogin/bukkit/EncryptionUtil.java

@@ -1,8 +1,7 @@
 package com.github.games647.fastlogin.bukkit;
 
-import com.google.common.base.Charsets;
-
 import java.math.BigInteger;
+import java.nio.charset.StandardCharsets;
 import java.security.GeneralSecurityException;
 import java.security.Key;
 import java.security.KeyPair;
@@ -28,6 +27,10 @@ public class EncryptionUtil {
     public static final int VERIFY_TOKEN_LENGTH = 4;
     public static final String KEY_PAIR_ALGORITHM = "RSA";
 
+    private EncryptionUtil() {
+        //utility
+    }
+
     /**
      * Generate a RSA key pair
      *
@@ -61,9 +64,9 @@ public class EncryptionUtil {
     /**
      * Generate the server id based on client and server data.
      *
-     * @param sessionId session for the current login attempt
+     * @param sessionId    session for the current login attempt
      * @param sharedSecret shared secret between the client and the server
-     * @param publicKey public key of the server
+     * @param publicKey    public key of the server
      * @return the server id formatted as a hexadecimal string.
      */
     public static String getServerIdHashString(String sessionId, Key sharedSecret, PublicKey publicKey) {
@@ -80,9 +83,9 @@ public class EncryptionUtil {
     /**
      * Decrypts the content and extracts the key spec.
      *
-     * @param cipher decryption cipher
+     * @param cipher     decryption cipher
      * @param privateKey private key of the server
-     * @param sharedKey the encrypted shared key
+     * @param sharedKey  the encrypted shared key
      * @return shared secret key
      * @throws GeneralSecurityException
      */
@@ -95,8 +98,8 @@ public class EncryptionUtil {
      * Decrypted the given data using the cipher.
      *
      * @param cipher decryption cypher
-     * @param key server private key
-     * @param data the encrypted data
+     * @param key    server private key
+     * @param data   the encrypted data
      * @return clear text data
      * @throws GeneralSecurityException if it fails to initialize and decrypt the data
      */
@@ -109,14 +112,10 @@ public class EncryptionUtil {
             throws NoSuchAlgorithmException {
         MessageDigest digest = MessageDigest.getInstance("SHA-1");
 
-        digest.update(sessionId.getBytes(Charsets.ISO_8859_1));
+        digest.update(sessionId.getBytes(StandardCharsets.ISO_8859_1));
         digest.update(sharedSecret.getEncoded());
         digest.update(publicKey.getEncoded());
 
         return digest.digest();
     }
-
-    private EncryptionUtil() {
-        //utility
-    }
 }

bukkit/src/main/java/com/github/games647/fastlogin/bukkit/FastLoginBukkit.java

@@ -4,15 +4,14 @@ import com.github.games647.fastlogin.bukkit.commands.CrackedCommand;
 import com.github.games647.fastlogin.bukkit.commands.PremiumCommand;
 import com.github.games647.fastlogin.bukkit.listener.BungeeListener;
 import com.github.games647.fastlogin.bukkit.listener.JoinListener;
-import com.github.games647.fastlogin.bukkit.listener.protocollib.SkinApplyListener;
 import com.github.games647.fastlogin.bukkit.listener.protocollib.ProtocolLibListener;
+import com.github.games647.fastlogin.bukkit.listener.protocollib.SkinApplyListener;
 import com.github.games647.fastlogin.bukkit.listener.protocolsupport.ProtocolSupportListener;
 import com.github.games647.fastlogin.bukkit.tasks.DelayedAuthHook;
 import com.github.games647.fastlogin.core.CommonUtil;
 import com.github.games647.fastlogin.core.mojang.MojangApiConnector;
 import com.github.games647.fastlogin.core.shared.FastLoginCore;
 import com.github.games647.fastlogin.core.shared.PlatformPlugin;
-import com.google.common.collect.Iterables;
 import com.google.common.io.ByteArrayDataOutput;
 import com.google.common.io.ByteStreams;
 import com.google.common.net.HostAndPort;
@@ -20,6 +19,7 @@ import com.google.common.net.HostAndPort;
 import java.nio.file.Path;
 import java.security.KeyPair;
 import java.util.List;
+import java.util.Optional;
 import java.util.concurrent.ConcurrentMap;
 import java.util.concurrent.ThreadFactory;
 
@@ -124,13 +124,14 @@ public class FastLoginBukkit extends JavaPlugin implements PlatformPlugin<Comman
         if (sender instanceof PluginMessageRecipient) {
             notifyBungeeCord((PluginMessageRecipient) sender, target, activate, true);
         } else {
-            Player firstPlayer = Iterables.getFirst(getServer().getOnlinePlayers(), null);
-            if (firstPlayer == null) {
+
+            Optional<? extends Player> optPlayer = getServer().getOnlinePlayers().stream().findFirst();
+            if (!optPlayer.isPresent()) {
                 logger.info("No player online to send a plugin message to the proxy");
                 return;
             }
 
-            notifyBungeeCord(firstPlayer, target, activate, false);
+            notifyBungeeCord(optPlayer.get(), target, activate, false);
         }
     }