require java 11

PATCHES.md

@@ -434,6 +434,8 @@ This is an overview over all patches that are currently used.
 | server |  Zombie horse naturally spawn      | William Blake Galbreath |  |
 | server |  add config for logging login location      | Simon Gardling |  |
 | server |  dont load chunks for physics      | Aikar |  |
+| server |  java 11      | Simon Gardling |  |
+| api |  java 11      | Simon Gardling |  |
 | server |  lithium DataTrackerMixin      | JellySquid | tr7zw |
 | server |  lithium HashedList      | JellySquid |  |
 | server |  lithium MixinBox      | JellySquid |  |

build.gradle.kts

@@ -59,10 +59,10 @@ subprojects {
     }
 
     java {
-        if(JavaVersion.VERSION_1_8 > JavaVersion.current()){
-            error("This build must be run with Java 8 or better")
+        if(JavaVersion.VERSION_11 > JavaVersion.current()){
+            error("This build must be run with Java 11 or later")
         }
-        sourceCompatibility = JavaVersion.VERSION_1_8
+        sourceCompatibility = JavaVersion.VERSION_11
         targetCompatibility = JavaVersion.current()
         withSourcesJar()
     }

patches/api/0009-java-11.patch

@@ -0,0 +1,21 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Simon Gardling <titaniumtown@gmail.com>
+Date: Fri, 23 Apr 2021 11:11:13 -0400
+Subject: [PATCH] java 11
+
+
+diff --git a/pom.xml b/pom.xml
+index 4689aa0788afb7fe5b7c8d1a906373bef2744e91..da706aedb9926a95db6d4e72047b24efbda57447 100644
+--- a/pom.xml
++++ b/pom.xml
+@@ -19,8 +19,8 @@
+
+     <properties>
+         <!-- <skipTests>true</skipTests> Paper - This [was] not going to end well -->
+-        <maven.compiler.source>1.8</maven.compiler.source>
+-        <maven.compiler.target>1.8</maven.compiler.target>
++        <maven.compiler.source>11</maven.compiler.source>
++        <maven.compiler.target>11</maven.compiler.target>
+         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+     </properties>
+

patches/server/0076-java-11.patch

@@ -0,0 +1,59 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Simon Gardling <titaniumtown@gmail.com>
+Date: Fri, 23 Apr 2021 11:11:20 -0400
+Subject: [PATCH] java 11
+
+
+diff --git a/pom.xml b/pom.xml
+index f0a73238612327d71cf78801df816823d80893a0..57a87372c039fb410c97eaa00227b429b90da2b1 100644
+--- a/pom.xml
++++ b/pom.xml
+@@ -14,8 +14,8 @@
+         <bt.name>git</bt.name>
+         <minecraft.version>1.16.5</minecraft.version>
+         <minecraft_version>1_16_R3</minecraft_version>
+-        <maven.compiler.source>1.8</maven.compiler.source>
+-        <maven.compiler.target>1.8</maven.compiler.target>
++        <maven.compiler.source>11</maven.compiler.source>
++        <maven.compiler.target>11</maven.compiler.target>
+     </properties>
+
+     <parent>
+diff --git a/src/main/java/io/papermc/paper/util/PaperJvmChecker.java b/src/main/java/io/papermc/paper/util/PaperJvmChecker.java
+index c6ea429819c07e7f4bc257cad73463a030767825..b64ffe8240409e038c80a0384c5938e5141bc838 100644
+--- a/src/main/java/io/papermc/paper/util/PaperJvmChecker.java
++++ b/src/main/java/io/papermc/paper/util/PaperJvmChecker.java
+@@ -28,21 +28,18 @@ public class PaperJvmChecker {
+     public static void checkJvm() {
+         if (getJvmVersion() < 11) {
+             final Logger logger = LogManager.getLogger();
+-            logger.warn("************************************************************");
+-            logger.warn("* WARNING - YOU ARE RUNNING AN OUTDATED VERSION OF JAVA.");
+-            logger.warn("* PAPER WILL STOP BEING COMPATIBLE WITH THIS VERSION OF");
+-            logger.warn("* JAVA WHEN MINECRAFT 1.17 IS RELEASED.");
+-            logger.warn("*");
+-            logger.warn("* Please update the version of Java you use to run Paper");
+-            logger.warn("* to at least Java 11. When Paper for Minecraft 1.17 is");
+-            logger.warn("* released support for versions of Java before 11 will");
+-            logger.warn("* be dropped.");
+-            logger.warn("*");
+-            logger.warn("* Current Java version: {}", System.getProperty("java.version"));
+-            logger.warn("*");
+-            logger.warn("* Check this forum post for more information: ");
+-            logger.warn("*   https://papermc.io/java11");
+-            logger.warn("************************************************************");
++            // Yatopia start - require java 11+
++            // Note - no clue how someone would run a jar built for java 11 on a java version lower than 11, but doesn't hurt to update this warning I guess.
++            logger.fatal("************************************************************");
++            logger.fatal("* ERROR - YOU ARE RUNNING AN OUTDATED VERSION OF JAVA.");
++            logger.fatal("* YOU NEED TO BE RUNNING JAVA 11 OR HIGHER");
++            logger.fatal("* In order to achieve Yatopia's high performance,");
++            logger.fatal("* Yatopia uses features only found in Java 11 or higher.");
++            logger.fatal("* If you do not know how to install Java 11 or have any other questions,");
++            logger.fatal("* Join our discord server (https://discord.io/YatopiaMC) and ask for support in #yatopia-help");
++            logger.fatal("************************************************************");
++            System.exit()
++            // Yatopia end
+         }
+     }
+ }