Cache session exception

The concept behind this patch will be expanded in due time as health permits,
however; This is one of the more common/troublesome exceptions that is thrown
and causes issues for the proxies performance

BungeeCord-Patches/0054-Cache-session-exceptions.patch

@@ -0,0 +1,55 @@
+From 27c57c63c6994cd6f8985946b83540a8195ab37a Mon Sep 17 00:00:00 2001
+From: Shane Freeder <theboyetronic@gmail.com>
+Date: Mon, 25 Nov 2019 19:54:06 +0000
+Subject: [PATCH] Cache session exceptions
+
+
+diff --git a/api/src/main/java/io/github/waterfallmc/waterfall/utils/FastException.java b/api/src/main/java/io/github/waterfallmc/waterfall/utils/FastException.java
+new file mode 100644
+index 00000000..11e103cb
+--- /dev/null
++++ b/api/src/main/java/io/github/waterfallmc/waterfall/utils/FastException.java
+@@ -0,0 +1,19 @@
++package io.github.waterfallmc.waterfall.utils;
++
++// This is basically a copy of QuietException
++public class FastException extends RuntimeException {
++
++    public FastException(String message) {
++        super(message);
++    }
++
++    @Override
++    public synchronized Throwable initCause(Throwable cause) {
++        return this;
++    }
++
++    @Override
++    public synchronized Throwable fillInStackTrace() {
++        return this;
++    }
++}
+diff --git a/query/src/main/java/net/md_5/bungee/query/QueryHandler.java b/query/src/main/java/net/md_5/bungee/query/QueryHandler.java
+index ac99d02c..0c1ecfb8 100644
+--- a/query/src/main/java/net/md_5/bungee/query/QueryHandler.java
++++ b/query/src/main/java/net/md_5/bungee/query/QueryHandler.java
+@@ -32,6 +32,7 @@ public class QueryHandler extends SimpleChannelInboundHandler<DatagramPacket>
+     /*========================================================================*/
+     private final Random random = new Random();
+     private final Cache<InetAddress, QuerySession> sessions = CacheBuilder.newBuilder().expireAfterWrite( 30, TimeUnit.SECONDS ).build();
++    private static io.github.waterfallmc.waterfall.utils.FastException cachedNoSessionException = new io.github.waterfallmc.waterfall.utils.FastException("No Session!");
+ 
+     private void writeShort(ByteBuf buf, int s)
+     {
+@@ -96,7 +97,7 @@ public class QueryHandler extends SimpleChannelInboundHandler<DatagramPacket>
+             QuerySession session = sessions.getIfPresent( msg.sender().getAddress() );
+             if ( session == null || session.getToken() != challengeToken )
+             {
+-                throw new IllegalStateException( "No session!" );
++                throw cachedNoSessionException; // Waterfall
+             }
+ 
+             // Waterfall start
+-- 
+2.24.0
+