feat: make jar even more small, dependency relocation

bukkit/build.gradle.kts

@@ -37,5 +37,8 @@ tasks.shadowJar {
 
     relocate("org.yaml.snakeyaml", "dev.xhyrom.lighteco.libraries.org.yaml.snakeyaml")
 
-    relocate("com.zaxxer.hikari", "dev.xhyrom.lighteco.libraries.com.zaxxer.hikari")
+    relocate("org.mariadb.jdbc", "dev.xhyrom.lighteco.libraries.mariadb")
+    relocate("com.mysql", "dev.xhyrom.lighteco.libraries.mysql")
+    relocate("org.postgresql", "dev.xhyrom.lighteco.libraries.postgresql")
+    relocate("com.zaxxer.hikari", "dev.xhyrom.lighteco.libraries.hikari")
 }

bukkit/src/main/java/dev/xhyrom/lighteco/bukkit/BukkitLightEcoPlugin.java

@@ -52,7 +52,7 @@ public class BukkitLightEcoPlugin extends AbstractLightEcoPlugin {
 
     @Override
     protected void registerPlatformHooks() {
-        Hooks.register();
+        Hooks.register(this);
     }
 
     @Override

bukkit/src/main/java/dev/xhyrom/lighteco/bukkit/BukkitSchedulerAdapter.java

@@ -2,18 +2,28 @@ package dev.xhyrom.lighteco.bukkit;
 
 import dev.xhyrom.lighteco.common.plugin.scheduler.SchedulerAdapter;
 import dev.xhyrom.lighteco.common.plugin.scheduler.SchedulerTask;
+import lombok.Getter;
 import org.bukkit.scheduler.BukkitScheduler;
 import org.bukkit.scheduler.BukkitTask;
 
+import java.util.concurrent.Executor;
 import java.util.concurrent.TimeUnit;
 
 public class BukkitSchedulerAdapter implements SchedulerAdapter {
+    private final Executor async;
+
     private final BukkitLightEcoBootstrap bootstrap;
     private final BukkitScheduler scheduler;
 
     public BukkitSchedulerAdapter(BukkitLightEcoBootstrap bootstrap) {
         this.bootstrap = bootstrap;
         this.scheduler = bootstrap.getServer().getScheduler();
+
+        this.async = runnable -> this.scheduler.runTaskAsynchronously(this.bootstrap.getLoader(), runnable);
+    }
+
+    public Executor async() {
+        return this.async;
     }
 
     @Override

bukkit/src/main/java/dev/xhyrom/lighteco/bukkit/hooks/Hooks.java

@@ -1,14 +1,17 @@
 package dev.xhyrom.lighteco.bukkit.hooks;
 
+import dev.xhyrom.lighteco.bukkit.BukkitLightEcoPlugin;
 import org.bukkit.Bukkit;
 
 public class Hooks {
     private static PlaceholderAPIExpansion placeholderAPIExpansion;
 
-    public static void register() {
+    public static void register(BukkitLightEcoPlugin plugin) {
-        if (Bukkit.getPluginManager().getPlugin("PlaceholderAPI") != null)
+        if (Bukkit.getPluginManager().getPlugin("PlaceholderAPI") != null) {
+            placeholderAPIExpansion = new PlaceholderAPIExpansion(plugin);
             placeholderAPIExpansion.register();
         }
+    }
 
     public static void unregister() {
         if (Bukkit.getPluginManager().getPlugin("PlaceholderAPI") != null)

common/build.gradle.kts

@@ -9,13 +9,16 @@ dependencies {
         exclude(module = "checker-qual")
         exclude(module = "annotations")
     }
-    api("net.kyori:adventure-text-minimessage:4.14.0")
+    api("net.kyori:adventure-text-minimessage:4.14.0") {
+        exclude(module = "adventure-bom")
+        exclude(module = "adventure-api")
+    }
     api("com.google.guava:guava:32.1.2-jre")
 
     implementation("eu.okaeri:okaeri-configs-yaml-snakeyaml:5.0.0-beta.5")
     implementation("eu.okaeri:okaeri-configs-validator-okaeri:5.0.0-beta.5")
 
-    implementation("com.zaxxer:HikariCP:5.0.1")
+    compileOnly("com.zaxxer:HikariCP:5.0.1")
 
     compileOnly("org.projectlombok:lombok:1.18.28")
     annotationProcessor("org.projectlombok:lombok:1.18.28")

common/src/main/java/dev/xhyrom/lighteco/common/dependencies/Dependency.java

@@ -1,9 +1,39 @@
 package dev.xhyrom.lighteco.common.dependencies;
 
+import com.google.common.collect.ImmutableList;
+import dev.xhyrom.lighteco.common.dependencies.relocation.Relocation;
 import lombok.Getter;
 
+import java.util.List;
+
 @Getter
 public enum Dependency {
+    /**
+     * Somewhere we use brackets instad of dots, so we need to rewrite them
+     * This is because gradle's shadow plugin relocates using replacing full paths (dots)
+     */
+
+    ASM(
+            "org.ow2.asm",
+            "asm",
+            "9.1"
+    ),
+    ASM_COMMONS(
+            "org.ow2.asm",
+            "asm-commons",
+            "9.1"
+    ),
+    JAR_RELOCATOR(
+            "me.lucko",
+            "jar-relocator",
+            "1.7"
+    ),
+    HIKARI(
+            "com{}zaxxer",
+            "HikariCP",
+            "5.0.1",
+            Relocation.of("hikari", "com{}zaxxer{}hikari")
+    ),
     H2_DRIVER(
             "com.h2database",
             "h2",
@@ -15,41 +45,60 @@ public enum Dependency {
             "3.28.0"
     ),
     MARIADB_DRIVER(
-        "org.mariadb.jdbc",
+            "org{}mariadb{}jdbc",
             "mariadb-java-client",
-        "3.1.3"
+            "3.1.3",
+            Relocation.of("mariadb", "org{}mariadb{}jdbc")
     ),
     MYSQL_DRIVER(
             "mysql",
             "mysql-connector-java",
-        "8.0.23"
+            "8.0.23",
+            Relocation.of("mysql", "com{}mysql")
     ),
     POSTGRESQL_DRIVER(
-        "org.postgresql",
+            "org{}postgresql",
             "postgresql",
-        "42.6.0"
+            "42.6.0",
+            Relocation.of("postgresql", "org{}postgresql")
     );
 
     private final String fullPath;
     private final String version;
+    @Getter
+    private final List<Relocation> relocations;
 
     private static final String MAVEN_FORMAT = "%s/%s/%s/%s-%s.jar";
 
     Dependency(String groupId, String artifactId, String version) {
+        this(groupId, artifactId, version, new Relocation[0]);
+    }
+
+    Dependency(String groupId, String artifactId, String version, Relocation... relocations) {
         this.fullPath = String.format(MAVEN_FORMAT,
-                groupId.replace('.', '/'),
+                rewriteEscape(groupId).replace('.', '/'),
-                artifactId,
+                rewriteEscape(artifactId),
                 version,
-                artifactId,
+                rewriteEscape(artifactId),
                 version
         );
 
         this.version = version;
+        this.relocations = ImmutableList.copyOf(relocations);
+    }
+
+    private static String rewriteEscape(String path) {
+        return path.replace("{}", ".");
     }
 
     public String getFileName() {
-        String name = name().toLowerCase().replace('_', '-');
+        return getFileName(null);
+    }
 
-        return String.format("%s-%s.jar", name, this.version);
+    public String getFileName(String classifier) {
+        String name = name().toLowerCase().replace('_', '-');
+        String extra = classifier == null ? "" : "-" + classifier;
+
+        return String.format("%s-%s.jar", name, this.version + extra);
     }
 }

common/src/main/java/dev/xhyrom/lighteco/common/dependencies/DependencyManagerImpl.java

@@ -2,22 +2,23 @@ package dev.xhyrom.lighteco.common.dependencies;
 
 import com.google.common.collect.ImmutableSet;
 import com.google.common.io.MoreFiles;
+import dev.xhyrom.lighteco.common.dependencies.relocation.Relocation;
+import dev.xhyrom.lighteco.common.dependencies.relocation.RelocationHandler;
 import dev.xhyrom.lighteco.common.plugin.LightEcoPlugin;
 import dev.xhyrom.lighteco.common.plugin.logger.PluginLogger;
 import dev.xhyrom.lighteco.common.util.URLClassLoaderAccess;
 import dev.xhyrom.lighteco.common.storage.StorageType;
+import org.checkerframework.checker.nullness.qual.MonotonicNonNull;
 
 import java.io.IOException;
 import java.net.URL;
 import java.net.URLClassLoader;
 import java.nio.file.Files;
 import java.nio.file.Path;
-import java.util.EnumMap;
+import java.util.*;
-import java.util.HashMap;
-import java.util.Map;
-import java.util.Set;
 import java.util.concurrent.CompletableFuture;
 import java.util.concurrent.CountDownLatch;
+import java.util.concurrent.Executor;
 
 public class DependencyManagerImpl implements DependencyManager {
     private final EnumMap<Dependency, Path> loaded = new EnumMap<>(Dependency.class);
@@ -27,6 +28,7 @@ public class DependencyManagerImpl implements DependencyManager {
     private final DependencyRegistry registry;
     private final Path cacheDirectory;
     private final URLClassLoaderAccess classLoader;
+    private @MonotonicNonNull RelocationHandler relocationHandler;
 
     public DependencyManagerImpl(LightEcoPlugin plugin) {
         this.logger = plugin.getBootstrap().getLogger();
@@ -35,9 +37,18 @@ public class DependencyManagerImpl implements DependencyManager {
         this.classLoader = URLClassLoaderAccess.create((URLClassLoader) plugin.getBootstrap().getClass().getClassLoader());
     }
 
+    private synchronized RelocationHandler getRelocationHandler() {
+        if (this.relocationHandler == null) {
+            this.relocationHandler = new RelocationHandler(this);
+        }
+
+        return this.relocationHandler;
+    }
+
     @Override
     public void loadDependencies(Set<Dependency> dependencies) {
         CountDownLatch latch = new CountDownLatch(dependencies.size());
+        this.logger.info("Loading dependencies: " + dependencies);
 
         for (Dependency dependency : dependencies) {
             if (this.loaded.containsKey(dependency)) {
@@ -46,18 +57,22 @@ public class DependencyManagerImpl implements DependencyManager {
             }
 
             CompletableFuture.runAsync(() -> {
+                System.out.println("Loading dependency " + dependency);
                 try {
                     loadDependency(dependency);
                 } catch (Exception e) {
                     throw new RuntimeException("Failed to load dependency " + dependency, e);
                 } finally {
                     latch.countDown();
+                    System.out.println("Loaded dependency " + dependency);
                 }
             });
         }
 
         try {
             latch.await();
+
+            this.logger.info("Loaded dependencies: " + dependencies);
         } catch (InterruptedException e) {
             throw new RuntimeException(e);
         }
@@ -68,7 +83,7 @@ public class DependencyManagerImpl implements DependencyManager {
             return;
         }
 
-        Path file = downloadDependency(dependency);
+        Path file = remapDependency(dependency, downloadDependency(dependency));
 
         this.loaded.put(dependency, file);
 
@@ -95,6 +110,24 @@ public class DependencyManagerImpl implements DependencyManager {
         return file;
     }
 
+    private Path remapDependency(Dependency dependency, Path normalFile) throws Exception {
+        List<Relocation> rules = new ArrayList<>(dependency.getRelocations());
+
+        if (rules.isEmpty()) {
+            return normalFile;
+        }
+
+        Path remappedFile = this.cacheDirectory.resolve(dependency.getFileName("remapped"));
+
+        // if the remapped source exists already, just use that.
+        if (Files.exists(remappedFile)) {
+            return remappedFile;
+        }
+
+        this.getRelocationHandler().remap(normalFile, remappedFile, rules);
+        return remappedFile;
+    }
+
     @Override
     public void loadStorageDependencies(Set<StorageType> types) {
         loadDependencies(this.registry.resolveStorageDependencies(types));

common/src/main/java/dev/xhyrom/lighteco/common/dependencies/DependencyRegistry.java

@@ -11,9 +11,9 @@ public class DependencyRegistry {
     private static final SetMultimap<StorageType, Dependency> STORAGE_DEPENDENCIES = ImmutableSetMultimap.<StorageType, Dependency>builder()
             .putAll(StorageType.SQLITE,     Dependency.SQLITE_DRIVER)
             .putAll(StorageType.H2,         Dependency.H2_DRIVER)
-            .putAll(StorageType.MYSQL, Dependency.MYSQL_DRIVER)
+            .putAll(StorageType.MYSQL,      Dependency.MYSQL_DRIVER,        Dependency.HIKARI)
-            .putAll(StorageType.MARIADB, Dependency.MARIADB_DRIVER)
+            .putAll(StorageType.MARIADB,    Dependency.MARIADB_DRIVER,      Dependency.HIKARI)
-            .putAll(StorageType.POSTGRESQL, Dependency.POSTGRESQL_DRIVER)
+            .putAll(StorageType.POSTGRESQL, Dependency.POSTGRESQL_DRIVER,   Dependency.HIKARI)
             .build();
 
     public Set<Dependency> resolveStorageDependencies(Set<StorageType> types) {

common/src/main/java/dev/xhyrom/lighteco/common/dependencies/relocation/Relocation.java

@@ -0,0 +1,21 @@
+package dev.xhyrom.lighteco.common.dependencies.relocation;
+
+import lombok.Getter;
+
+@Getter
+public class Relocation {
+    private static final String RELOCATION_PREFIX = "dev.xhyrom.lighteco.libraries.";
+
+    public static Relocation of(String id, String pattern) {
+        return new Relocation(pattern.replace("{}", "."), RELOCATION_PREFIX + id);
+    }
+
+    private final String pattern;
+    private final String relocatedPattern;
+
+    private Relocation(String pattern, String relocatedPattern) {
+        this.pattern = pattern;
+        this.relocatedPattern = relocatedPattern;
+    }
+
+}

common/src/main/java/dev/xhyrom/lighteco/common/dependencies/relocation/RelocationHandler.java

@@ -0,0 +1,63 @@
+package dev.xhyrom.lighteco.common.dependencies.relocation;
+
+import dev.xhyrom.lighteco.common.dependencies.Dependency;
+import dev.xhyrom.lighteco.common.dependencies.DependencyManager;
+import dev.xhyrom.lighteco.common.dependencies.IsolatedClassLoader;
+
+import java.io.File;
+import java.io.IOException;
+import java.lang.reflect.Constructor;
+import java.lang.reflect.Method;
+import java.nio.file.Path;
+import java.util.*;
+
+public class RelocationHandler {
+    public static final Set<Dependency> DEPENDENCIES = EnumSet.of(Dependency.ASM, Dependency.ASM_COMMONS, Dependency.JAR_RELOCATOR);
+    private static final String JAR_RELOCATOR_CLASS = "me.lucko.jarrelocator.JarRelocator";
+    private static final String JAR_RELOCATOR_RUN_METHOD = "run";
+
+    private final Constructor<?> jarRelocatorConstructor;
+    private final Method jarRelocatorRunMethod;
+
+    public RelocationHandler(DependencyManager dependencyManager) {
+        ClassLoader classLoader = null;
+        try {
+            // download the required dependencies for remapping
+            dependencyManager.loadDependencies(DEPENDENCIES);
+            // get a classloader containing the required dependencies as sources
+            classLoader = dependencyManager.obtainClassLoaderWith(DEPENDENCIES);
+
+            // load the relocator class
+            Class<?> jarRelocatorClass = classLoader.loadClass(JAR_RELOCATOR_CLASS);
+
+            // prepare the reflected constructor & method instances
+            this.jarRelocatorConstructor = jarRelocatorClass.getDeclaredConstructor(File.class, File.class, Map.class);
+            this.jarRelocatorConstructor.setAccessible(true);
+
+            this.jarRelocatorRunMethod = jarRelocatorClass.getDeclaredMethod(JAR_RELOCATOR_RUN_METHOD);
+            this.jarRelocatorRunMethod.setAccessible(true);
+        } catch (Exception e) {
+            try {
+                if (classLoader instanceof IsolatedClassLoader) {
+                    ((IsolatedClassLoader) classLoader).close();
+                }
+            } catch (IOException ex) {
+                e.addSuppressed(ex);
+            }
+
+            throw new RuntimeException(e);
+        }
+    }
+
+    public void remap(Path input, Path output, List<Relocation> relocations) throws Exception {
+        Map<String, String> mappings = new HashMap<>();
+        for (Relocation relocation : relocations) {
+            mappings.put(relocation.getPattern(), relocation.getRelocatedPattern());
+        }
+
+        // create and invoke a new relocator
+        Object relocator = this.jarRelocatorConstructor.newInstance(input.toFile(), output.toFile(), mappings);
+        this.jarRelocatorRunMethod.invoke(relocator);
+    }
+
+}

common/src/main/java/dev/xhyrom/lighteco/common/plugin/scheduler/SchedulerAdapter.java

@@ -1,8 +1,11 @@
 package dev.xhyrom.lighteco.common.plugin.scheduler;
 
+import java.util.concurrent.Executor;
 import java.util.concurrent.TimeUnit;
 
 public interface SchedulerAdapter {
+    Executor async();
+
     SchedulerTask asyncLater(Runnable runnable, long delay, TimeUnit unit);
 
     SchedulerTask asyncRepeating(Runnable runnable, long interval, TimeUnit unit);