Fixed building and switched event library

api/base/build.gradle.kts

@@ -1,5 +1,4 @@
 dependencies {
     api("org.geysermc.cumulus", "cumulus", Versions.cumulusVersion)
+    api("org.geysermc.event", "events", Versions.eventsVersion)
 }
-
-provided("net.kyori", "event-api", Versions.eventVersion)

api/geyser/src/main/java/org/geysermc/geyser/api/GeyserApi.java

@@ -55,12 +55,6 @@ public interface GeyserApi extends GeyserApiBase {
     @Override
     @Nullable GeyserConnection connectionByXuid(@NonNull String xuid);
 
-    /**
-     * {@inheritDoc}
-     */
-    @Override
-    @Nullable GeyserConnection connectionByUsername(@NonNull String username);
-
     /**
      * {@inheritDoc}
      */

api/geyser/src/main/java/org/geysermc/geyser/api/event/EventBus.java

@@ -26,71 +26,18 @@
 package org.geysermc.geyser.api.event;
 
 import org.checkerframework.checker.nullness.qual.NonNull;
+import org.geysermc.event.Event;
+import org.geysermc.event.bus.OwnedEventBus;
 import org.geysermc.geyser.api.extension.Extension;
 
 import java.util.Set;
-import java.util.function.Consumer;
 
 /**
  * Represents a bus capable of subscribing
  * or "listening" to events and firing them.
  */
-public interface EventBus {
+public interface EventBus extends OwnedEventBus<Extension, Event, EventSubscriber<? extends Event>> {
-
+    @Override
-    /**
-     * Subscribes to the given event see {@link EventSubscription}.
-     *
-     * The difference between this method and {@link ExtensionEventBus#subscribe(Class, Consumer)}
-     * is that this method takes in an extension parameter which allows for
-     * the event to be unsubscribed upon extension disable and reloads.
-     *
-     * @param extension the extension to subscribe the event to
-     * @param eventClass the class of the event
-     * @param consumer the consumer for handling the event
-     * @param <T> the event class
-     * @return the event subscription
-     */
     @NonNull
-    <T extends Event> EventSubscription<T> subscribe(@NonNull Extension extension, @NonNull Class<T> eventClass, @NonNull Consumer<? super T> consumer);
+    <T extends Event> Set<? extends EventSubscriber<T>> subscribers(@NonNull Class<T> eventClass);
-
-    /**
-     * Unsubscribes the given {@link EventSubscription}.
-     *
-     * @param subscription the event subscription
-     */
-    <T extends Event> void unsubscribe(@NonNull EventSubscription<T> subscription);
-
-    /**
-     * Registers events for the given listener.
-     *
-     * @param extension the extension registering the event
-     * @param eventHolder the listener
-     */
-    void register(@NonNull Extension extension, @NonNull Object eventHolder);
-
-    /**
-     * Unregisters all events from a given {@link Extension}.
-     *
-     * @param extension the extension
-     */
-     void unregisterAll(@NonNull Extension extension);
-
-    /**
-     * Fires the given {@link Event} and returns the result.
-     *
-     * @param event the event to fire
-     *
-     * @return true if the event successfully fired
-     */
-    boolean fire(@NonNull Event event);
-
-    /**
-     * Gets the subscriptions for the given event class.
-     *
-     * @param eventClass the event class
-     * @param <T> the value
-     * @return the subscriptions for the event class
-     */
-    @NonNull
-    <T extends Event> Set<EventSubscription<T>> subscriptions(@NonNull Class<T> eventClass);
 }

api/geyser/src/main/java/org/geysermc/geyser/api/event/EventSubscriber.java

@@ -25,22 +25,16 @@
 
 package org.geysermc.geyser.api.event;
 
-/**
+import org.geysermc.event.Event;
- * Represents a cancellable event.
+import org.geysermc.event.subscribe.OwnedSubscriber;
- */
+import org.geysermc.geyser.api.extension.Extension;
-public interface Cancellable {
 
 /**
-     * Gets if the event is cancelled.
+ * Represents a subscribed listener to a {@link Event}. Wraps around
+ * the event and is capable of unsubscribing from the event or give
+ * information about it.
  *
-     * @return if the event is cancelled
+ * @param <T> the class of the event
  */
-    boolean isCancelled();
+public interface EventSubscriber<T extends Event> extends OwnedSubscriber<Extension, T> {
-
-    /**
-     * Cancels the event.
-     *
-     * @param cancelled if the event is cancelled
-     */
-    void setCancelled(boolean cancelled);
 }

api/geyser/src/main/java/org/geysermc/geyser/api/event/EventSubscription.java

@@ -1,82 +0,0 @@
-/*
- * Copyright (c) 2019-2022 GeyserMC. http://geysermc.org
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
- * THE SOFTWARE.
- *
- * @author GeyserMC
- * @link https://github.com/GeyserMC/Geyser
- */
-
-package org.geysermc.geyser.api.event;
-
-import org.checkerframework.checker.nullness.qual.NonNull;
-import org.geysermc.geyser.api.extension.Extension;
-
-/**
- * Represents a subscribed listener to a {@link Event}. Wraps around
- * the event and is capable of unsubscribing from the event or give
- * information about it.
- *
- * @param <T> the class of the event
- */
-public interface EventSubscription<T extends Event> {
-
-    /**
-     * Gets the event class.
-     *
-     * @return the event class
-     */
-    @NonNull
-    Class<T> eventClass();
-
-    /**
-     * Gets the {@link Extension} that owns this
-     * event subscription.
-     *
-     * @return the extension that owns this subscription
-     */
-    @NonNull
-    Extension owner();
-
-    /**
-     * Gets the post order of this event subscription.
-     *
-     * @return the post order of this event subscription
-     */
-    Subscribe.PostOrder order();
-
-    /**
-     * Gets if this event subscription is active.
-     *
-     * @return if this event subscription is active
-     */
-    boolean isActive();
-
-    /**
-     * Unsubscribes from this event listener
-     */
-    void unsubscribe();
-
-    /**
-     * Invokes the given event
-     *
-     * @param event the event
-     */
-    void invoke(@NonNull T event) throws Throwable;
-}

api/geyser/src/main/java/org/geysermc/geyser/api/event/ExtensionEventBus.java

@@ -26,36 +26,15 @@
 package org.geysermc.geyser.api.event;
 
 import org.checkerframework.checker.nullness.qual.NonNull;
+import org.geysermc.event.Event;
 
-import java.util.function.Consumer;
+import java.util.Set;
 
 /**
  * An {@link EventBus} with additional methods that implicitly
  * set the extension instance.
- *
  */
-public interface ExtensionEventBus extends EventBus {
+public interface ExtensionEventBus extends org.geysermc.event.bus.EventBus<Event, EventSubscriber<? extends Event>> {
-
+    @Override
-    /**
+    @NonNull <T extends Event> Set<? extends EventSubscriber<T>> subscribers(@NonNull Class<T> eventClass);
-     * Subscribes to the given event see {@link EventSubscription}.
-     *
-     * @param eventClass the class of the event
-     * @param consumer the consumer for handling the event
-     * @param <T> the event class
-     * @return the event subscription
-     */
-    @NonNull
-    <T extends Event> EventSubscription<T> subscribe(@NonNull Class<T> eventClass, @NonNull Consumer<? super T> consumer);
-
-    /**
-     * Registers events for the given listener.
-     *
-     * @param eventHolder the listener
-     */
-    void register(@NonNull Object eventHolder);
-
-    /**
-     * Unregisters all events for this extension.
-     */
-    void unregisterAll();
 }

api/geyser/src/main/java/org/geysermc/geyser/api/event/ExtensionEventSubscriber.java

@@ -25,17 +25,8 @@
 
 package org.geysermc.geyser.api.event;
 
-/**
+import org.geysermc.event.Event;
- * Represents an event.
+import org.geysermc.event.subscribe.Subscriber;
- */
-public interface Event {
 
-    /**
+public interface ExtensionEventSubscriber<T extends Event> extends Subscriber<T> {
-     * Gets if the event is async.
-     *
-     * @return if the event is async
-     */
-    default boolean isAsync() {
-        return false;
-    }
 }

api/geyser/src/main/java/org/geysermc/geyser/api/event/Subscribe.java

@@ -1,103 +0,0 @@
-/*
- * Copyright (c) 2019-2022 GeyserMC. http://geysermc.org
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
- * THE SOFTWARE.
- *
- * @author GeyserMC
- * @link https://github.com/GeyserMC/Geyser
- */
-
-package org.geysermc.geyser.api.event;
-
-import java.lang.annotation.ElementType;
-import java.lang.annotation.Retention;
-import java.lang.annotation.RetentionPolicy;
-import java.lang.annotation.Target;
-
-/**
- * An annotation used to signify the given method is
- * an {@link Event}. Only should be applied to methods
- * where the class containing them is designated for
- * events specifically.
- *
- * When using {@link EventBus#subscribe}, this annotation should
- * not be applied whatsoever as it will have no use and potentially
- * throw errors due to it being used wrongly.
- */
-@Retention(RetentionPolicy.RUNTIME)
-@Target(ElementType.METHOD)
-public @interface Subscribe {
-
-    /**
-     * The {@link PostOrder} of the event
-     *
-     * @return the post order of the event
-     */
-    Subscribe.PostOrder postOrder() default PostOrder.NORMAL;
-
-    /**
-     * Represents the post order of an event.
-     */
-    enum PostOrder {
-
-        /**
-         * The lowest priority. Called first to
-         * allow for other events to customize
-         * the outcome
-         */
-        FIRST(net.kyori.event.PostOrders.FIRST),
-
-        /**
-         * The second lowest priority.
-         */
-        EARLY(net.kyori.event.PostOrders.EARLY),
-
-        /**
-         * Normal priority. Event is neither
-         * important nor unimportant
-         */
-        NORMAL(net.kyori.event.PostOrders.NORMAL),
-
-        /**
-         * The second highest priority
-         */
-        LATE(net.kyori.event.PostOrders.LATE),
-
-        /**
-         * The highest of importance! Event is called
-         * last and has the final say in the outcome
-         */
-        LAST(net.kyori.event.PostOrders.LAST);
-
-        private final int postOrder;
-
-        PostOrder(int postOrder) {
-            this.postOrder = postOrder;
-        }
-
-        /**
-         * The numerical post order value.
-         *
-         * @return numerical post order value
-         */
-        public int postOrder() {
-            return this.postOrder;
-        }
-    }
-}

api/geyser/src/main/java/org/geysermc/geyser/api/event/connection/ConnectionEvent.java

@@ -26,8 +26,8 @@
 package org.geysermc.geyser.api.event.connection;
 
 import org.checkerframework.checker.nullness.qual.NonNull;
+import org.geysermc.event.Event;
 import org.geysermc.geyser.api.connection.GeyserConnection;
-import org.geysermc.geyser.api.event.Event;
 
 /**
  * An event that contains a {@link GeyserConnection}.

api/geyser/src/main/java/org/geysermc/geyser/api/event/downstream/ServerDefineCommandsEvent.java

@@ -26,8 +26,8 @@
 package org.geysermc.geyser.api.event.downstream;
 
 import org.checkerframework.checker.nullness.qual.NonNull;
+import org.geysermc.event.Cancellable;
 import org.geysermc.geyser.api.connection.GeyserConnection;
-import org.geysermc.geyser.api.event.Cancellable;
 import org.geysermc.geyser.api.event.connection.ConnectionEvent;
 
 import java.util.Set;

api/geyser/src/main/java/org/geysermc/geyser/api/event/lifecycle/GeyserDefineCustomItemsEvent.java

@@ -25,45 +25,34 @@
 
 package org.geysermc.geyser.api.event.lifecycle;
 
-import com.google.common.collect.Multimap;
 import org.checkerframework.checker.nullness.qual.NonNull;
-import org.geysermc.geyser.api.event.Event;
+import org.geysermc.event.Event;
 import org.geysermc.geyser.api.item.custom.CustomItemData;
 import org.geysermc.geyser.api.item.custom.NonVanillaCustomItemData;
 
-import java.util.*;
+import java.util.Collection;
+import java.util.List;
+import java.util.Map;
 
 /**
  * Called on Geyser's startup when looking for custom items. Custom items must be registered through this event.
  *
  * This event will not be called if the "add non-Bedrock items" setting is disabled in the Geyser config.
  */
-public abstract class GeyserDefineCustomItemsEvent implements Event {
+public interface GeyserDefineCustomItemsEvent extends Event {
-    private final Multimap<String, CustomItemData> customItems;
-    private final List<NonVanillaCustomItemData> nonVanillaCustomItems;
-
-    public GeyserDefineCustomItemsEvent(Multimap<String, CustomItemData> customItems, List<NonVanillaCustomItemData> nonVanillaCustomItems) {
-        this.customItems = customItems;
-        this.nonVanillaCustomItems = nonVanillaCustomItems;
-    }
-
     /**
      * Gets a multimap of all the already registered custom items indexed by the item's extended java item's identifier.
      *
      * @return a multimap of all the already registered custom items
      */
-    public Map<String, Collection<CustomItemData>> getExistingCustomItems() {
+    Map<String, Collection<CustomItemData>> getExistingCustomItems();
-        return Collections.unmodifiableMap(this.customItems.asMap());
-    }
 
     /**
      * Gets the list of the already registered non-vanilla custom items.
      *
      * @return the list of the already registered non-vanilla custom items
      */
-    public List<NonVanillaCustomItemData> getExistingNonVanillaCustomItems() {
+    List<NonVanillaCustomItemData> getExistingNonVanillaCustomItems();
-        return Collections.unmodifiableList(this.nonVanillaCustomItems);
-    }
 
     /**
      * Registers a custom item with a base Java item. This is used to register items with custom textures and properties
@@ -73,7 +62,7 @@ public abstract class GeyserDefineCustomItemsEvent implements Event {
      * @param customItemData the custom item data to register
      * @return if the item was registered
      */
-    public abstract boolean register(@NonNull String identifier, @NonNull CustomItemData customItemData);
+    boolean register(@NonNull String identifier, @NonNull CustomItemData customItemData);
 
     /**
      * Registers a custom item with no base item. This is used for mods.
@@ -81,5 +70,5 @@ public abstract class GeyserDefineCustomItemsEvent implements Event {
      * @param customItemData the custom item data to register
      * @return if the item was registered
      */
-    public abstract boolean register(@NonNull NonVanillaCustomItemData customItemData);
+    boolean register(@NonNull NonVanillaCustomItemData customItemData);
 }

api/geyser/src/main/java/org/geysermc/geyser/api/event/lifecycle/GeyserLoadResourcePacksEvent.java

@@ -26,7 +26,7 @@
 package org.geysermc.geyser.api.event.lifecycle;
 
 import org.checkerframework.checker.nullness.qual.NonNull;
-import org.geysermc.geyser.api.event.Event;
+import org.geysermc.event.Event;
 
 import java.nio.file.Path;
 import java.util.List;

api/geyser/src/main/java/org/geysermc/geyser/api/event/lifecycle/GeyserPostInitializeEvent.java

@@ -26,7 +26,7 @@
 package org.geysermc.geyser.api.event.lifecycle;
 
 import org.checkerframework.checker.nullness.qual.NonNull;
-import org.geysermc.geyser.api.event.Event;
+import org.geysermc.event.Event;
 import org.geysermc.geyser.api.event.EventBus;
 import org.geysermc.geyser.api.extension.ExtensionManager;
 

api/geyser/src/main/java/org/geysermc/geyser/api/event/lifecycle/GeyserPreInitializeEvent.java

@@ -26,7 +26,7 @@
 package org.geysermc.geyser.api.event.lifecycle;
 
 import org.checkerframework.checker.nullness.qual.NonNull;
-import org.geysermc.geyser.api.event.Event;
+import org.geysermc.event.Event;
 import org.geysermc.geyser.api.event.EventBus;
 import org.geysermc.geyser.api.extension.ExtensionManager;
 

api/geyser/src/main/java/org/geysermc/geyser/api/event/lifecycle/GeyserShutdownEvent.java

@@ -26,8 +26,8 @@
 package org.geysermc.geyser.api.event.lifecycle;
 
 import org.checkerframework.checker.nullness.qual.NonNull;
+import org.geysermc.event.Event;
 import org.geysermc.geyser.api.command.CommandManager;
-import org.geysermc.geyser.api.event.Event;
 import org.geysermc.geyser.api.event.EventBus;
 import org.geysermc.geyser.api.extension.ExtensionManager;
 

build-logic/src/main/kotlin/Versions.kt

@@ -39,9 +39,9 @@ object Versions {
     const val mcprotocollibversion = "9f78bd5"
     const val packetlibVersion = "3.0"
     const val adventureVersion = "4.9.3"
-    const val eventVersion = "3.0.0"
     const val junitVersion = "4.13.1"
     const val checkerQualVersion = "3.19.0"
     const val cumulusVersion  = "1.1.1"
+    const val eventsVersion = "1.0-SNAPSHOT"
     const val log4jVersion  = "2.17.1"
 }

core/build.gradle.kts

@@ -67,9 +67,6 @@ dependencies {
     implementation("net.kyori", "adventure-text-serializer-legacy", Versions.adventureVersion)
     implementation("net.kyori", "adventure-text-serializer-plain", Versions.adventureVersion)
 
-    // Kyori Misc
-    implementation("net.kyori", "event-api", Versions.eventVersion)
-
     // Test
     testImplementation("junit", "junit", Versions.junitVersion)
 

core/src/main/java/org/geysermc/geyser/GeyserImpl.java

@@ -467,18 +467,6 @@ public class GeyserImpl implements GeyserApi {
         this.eventBus.fire(new GeyserPostInitializeEvent(this.extensionManager, this.eventBus));
     }
 
-    @Override
-    public @Nullable GeyserSession connectionByUsername(@NonNull String username) {
-        for (GeyserSession session : sessionManager.getAllSessions()) {
-            if (session.bedrockUsername().equals(username) || session.getProtocol().getProfile().getName().equals(
-                username)) {
-                return session;
-            }
-        }
-
-        return null;
-    }
-
     @Override
     public @NonNull List<GeyserSession> onlineConnections() {
         return sessionManager.getAllSessions();

core/src/main/java/org/geysermc/geyser/event/AbstractEventSubscription.java

@@ -1,68 +0,0 @@
-/*
- * Copyright (c) 2019-2022 GeyserMC. http://geysermc.org
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
- * THE SOFTWARE.
- *
- * @author GeyserMC
- * @link https://github.com/GeyserMC/Geyser
- */
-
-package org.geysermc.geyser.event;
-
-import lombok.AccessLevel;
-import lombok.Getter;
-import lombok.RequiredArgsConstructor;
-import lombok.experimental.Accessors;
-import net.kyori.event.EventSubscriber;
-import org.geysermc.geyser.api.event.Event;
-import org.geysermc.geyser.api.event.EventBus;
-import org.geysermc.geyser.api.event.EventSubscription;
-import org.geysermc.geyser.api.event.Subscribe;
-import org.geysermc.geyser.api.extension.Extension;
-
-@Getter
-@Accessors(fluent = true)
-@RequiredArgsConstructor
-public abstract class AbstractEventSubscription<T extends Event> implements EventSubscription<T>, EventSubscriber<T> {
-    protected final EventBus eventBus;
-    protected final Class<T> eventClass;
-    protected final Extension owner;
-    protected final Subscribe.PostOrder order;
-    @Getter(AccessLevel.NONE) private boolean active;
-
-    @Override
-    public boolean isActive() {
-        return this.active;
-    }
-
-    @Override
-    public void unsubscribe() {
-        if (!this.active) {
-            return;
-        }
-
-        this.active = false;
-        this.eventBus.unsubscribe(this);
-    }
-
-    @Override
-    public int postOrder() {
-        return this.order.postOrder();
-    }
-}

core/src/main/java/org/geysermc/geyser/event/GeneratedEventSubscription.java

@@ -1,60 +0,0 @@
-/*
- * Copyright (c) 2019-2022 GeyserMC. http://geysermc.org
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
- * THE SOFTWARE.
- *
- * @author GeyserMC
- * @link https://github.com/GeyserMC/Geyser
- */
-
-package org.geysermc.geyser.event;
-
-import lombok.Getter;
-import lombok.experimental.Accessors;
-import org.checkerframework.checker.nullness.qual.NonNull;
-import org.geysermc.geyser.api.event.Event;
-import org.geysermc.geyser.api.event.EventBus;
-import org.geysermc.geyser.api.event.Subscribe;
-import org.geysermc.geyser.api.extension.Extension;
-
-import java.util.function.BiConsumer;
-
-@Getter
-@Accessors(fluent = true)
-public class GeneratedEventSubscription<T extends Event> extends AbstractEventSubscription<T> {
-    private final Object eventHolder;
-    private final BiConsumer<Object, ? super T> eventConsumer;
-
-    public GeneratedEventSubscription(EventBus eventBus, Class<T> eventClass, Extension owner, Subscribe.PostOrder order, Object eventHolder, BiConsumer<Object, ? super T> eventConsumer) {
-        super(eventBus, eventClass, owner, order);
-
-        this.eventHolder = eventHolder;
-        this.eventConsumer = eventConsumer;
-    }
-
-    @Override
-    public void invoke(@NonNull T event) throws Throwable {
-        try {
-            this.eventConsumer.accept(this.eventHolder, event);
-        } catch (Throwable ex) {
-            this.owner.logger().warning("Unable to fire event " + event.getClass().getSimpleName() + " with subscription " + this.eventConsumer.getClass().getSimpleName());
-            ex.printStackTrace();
-        }
-    }
-}

core/src/main/java/org/geysermc/geyser/event/GeyserEventBus.java

@@ -25,97 +25,40 @@
 
 package org.geysermc.geyser.event;
 
-import net.kyori.event.EventSubscriber;
-import net.kyori.event.SimpleEventBus;
 import org.checkerframework.checker.nullness.qual.NonNull;
-import org.geysermc.geyser.api.event.Event;
+import org.geysermc.event.Event;
+import org.geysermc.event.bus.impl.OwnedEventBusImpl;
+import org.geysermc.event.subscribe.OwnedSubscriber;
+import org.geysermc.event.subscribe.Subscribe;
 import org.geysermc.geyser.api.event.EventBus;
-import org.geysermc.geyser.api.event.EventSubscription;
+import org.geysermc.geyser.api.event.EventSubscriber;
-import org.geysermc.geyser.api.event.Subscribe;
 import org.geysermc.geyser.api.extension.Extension;
-import org.lanternpowered.lmbda.LambdaFactory;
 
-import java.lang.invoke.MethodHandles;
-import java.lang.reflect.Method;
 import java.util.Set;
 import java.util.function.BiConsumer;
 import java.util.function.Consumer;
-import java.util.function.Predicate;
-import java.util.stream.Collectors;
-
-public class GeyserEventBus implements EventBus {
-    private static final MethodHandles.Lookup CALLER = MethodHandles.lookup();
-
-    private final SimpleEventBus<Event> bus = new SimpleEventBus<>(Event.class);
-
-    @NonNull
-    @Override
-    public <T extends Event> EventSubscription<T> subscribe(@NonNull Extension extension, @NonNull Class<T> eventClass, @NonNull Consumer<? super T> consumer) {
-        return this.subscribe(eventClass, consumer, extension, Subscribe.PostOrder.NORMAL);
-    }
-
-    @Override
-    public <T extends Event> void unsubscribe(@NonNull EventSubscription<T> subscription) {
-        this.bus.unregister((AbstractEventSubscription<T>) subscription);
-    }
 
 @SuppressWarnings("unchecked")
+public final class GeyserEventBus extends OwnedEventBusImpl<Extension, Event, EventSubscriber<? extends Event>>
+        implements EventBus {
     @Override
-    public void register(@NonNull Extension extension, @NonNull Object eventHolder) {
+    protected <L, T extends Event, B extends OwnedSubscriber<Extension, T>> B makeSubscription(
-        for (Method method : eventHolder.getClass().getMethods()) {
+            Extension owner, Class<T> eventClass, Subscribe subscribe,
-            if (!method.isAnnotationPresent(Subscribe.class)) {
+            L listener, BiConsumer<L, T> handler) {
-                continue;
+        return (B) new GeyserEventSubscriber<>(
-            }
+                owner, eventClass, subscribe.postOrder(), subscribe.ignoreCancelled(), listener, handler
-
+        );
-            if (method.getParameterCount() > 1) {
-                continue;
-            }
-
-            if (!Event.class.isAssignableFrom(method.getParameters()[0].getType())) {
-                continue;
-            }
-
-            Subscribe subscribe = method.getAnnotation(Subscribe.class);
-
-            try {
-                Class<? extends Event> type = (Class<? extends Event>) method.getParameters()[0].getType();
-                this.subscribe(type, eventHolder, LambdaFactory.createBiConsumer(CALLER.unreflect(method)), extension, subscribe.postOrder());
-            } catch (IllegalAccessException ex) {
-                ex.printStackTrace();
-            }
-        }
     }
 
     @Override
-    public void unregisterAll(@NonNull Extension extension) {
+    protected <T extends Event, B extends OwnedSubscriber<Extension, T>> B makeSubscription(
-        this.bus.unregister((Predicate<EventSubscriber<?>>) subscriber -> extension.equals(((AbstractEventSubscription<?>) subscriber).owner()));
+            Extension owner, Class<T> eventClass, Consumer<T> handler) {
+        return (B) new GeyserEventSubscriber<>(owner, eventClass, handler);
     }
 
     @Override
-    public boolean fire(@NonNull Event event) {
-        return this.bus.post(event).wasSuccessful();
-    }
-
-    @SuppressWarnings("unchecked")
     @NonNull
-    @Override
+    public <T extends Event> Set<? extends EventSubscriber<T>> subscribers(@NonNull Class<T> eventClass) {
-    public <T extends Event> Set<EventSubscription<T>> subscriptions(@NonNull Class<T> eventClass) {
+        return castGenericSet(super.subscribers(eventClass));
-        return bus.subscribers().values()
-                .stream()
-                .filter(sub -> sub instanceof EventSubscription && ((EventSubscription<?>) sub).eventClass().isAssignableFrom(eventClass))
-                .map(sub -> ((EventSubscription<T>) sub))
-                .collect(Collectors.toSet());
-    }
-
-    private <T extends Event> EventSubscription<T> subscribe(Class<T> eventClass, Consumer<? super T> handler, Extension extension, Subscribe.PostOrder postOrder) {
-        BaseEventSubscription<T> eventSubscription = new BaseEventSubscription<>(this, eventClass, extension, postOrder, handler);
-        this.bus.register(eventClass, eventSubscription);
-        return eventSubscription;
-    }
-
-    private <T extends Event> EventSubscription<T> subscribe(Class<T> eventClass, Object eventHolder, BiConsumer<Object, ? super T> handler, Extension extension, Subscribe.PostOrder postOrder) {
-        GeneratedEventSubscription<T> eventSubscription = new GeneratedEventSubscription<>(this, eventClass, extension, postOrder, eventHolder, handler);
-        this.bus.register(eventClass, eventSubscription);
-        return eventSubscription;
     }
 }

core/src/main/java/org/geysermc/geyser/event/GeyserEventSubscriber.java

@@ -25,34 +25,23 @@
 
 package org.geysermc.geyser.event;
 
-import lombok.Getter;
+import org.geysermc.event.Event;
-import lombok.experimental.Accessors;
+import org.geysermc.event.PostOrder;
-import org.checkerframework.checker.nullness.qual.NonNull;
+import org.geysermc.event.subscribe.impl.OwnedSubscriberImpl;
-import org.geysermc.geyser.api.event.Event;
+import org.geysermc.geyser.api.event.ExtensionEventSubscriber;
-import org.geysermc.geyser.api.event.EventBus;
-import org.geysermc.geyser.api.event.Subscribe;
 import org.geysermc.geyser.api.extension.Extension;
 
+import java.util.function.BiConsumer;
 import java.util.function.Consumer;
 
-@Getter
+public final class GeyserEventSubscriber<E extends Event> extends OwnedSubscriberImpl<Extension, E>
-@Accessors(fluent = true)
+        implements ExtensionEventSubscriber<E> {
-public class BaseEventSubscription<T extends Event> extends AbstractEventSubscription<T> {
+    GeyserEventSubscriber(Extension owner, Class<E> eventClass, Consumer<E> handler) {
-    private final Consumer<? super T> eventConsumer;
+        super(owner, eventClass, handler);
-
-    public BaseEventSubscription(EventBus eventBus, Class<T> eventClass, Extension owner, Subscribe.PostOrder order, Consumer<? super T> eventConsumer) {
-        super(eventBus, eventClass, owner, order);
-
-        this.eventConsumer = eventConsumer;
     }
 
-    @Override
+    <H> GeyserEventSubscriber(Extension owner, Class<E> eventClass, PostOrder postOrder, boolean ignoreCancelled,
-    public void invoke(@NonNull T event) throws Throwable {
+                              H handlerInstance, BiConsumer<H, E> handler) {
-        try {
+        super(owner, eventClass, postOrder, ignoreCancelled, handlerInstance, handler);
-            this.eventConsumer.accept(event);
-        } catch (Throwable ex) {
-            this.owner.logger().warning("Unable to fire event " + event.getClass().getSimpleName() + " with subscription " + this.eventConsumer.getClass().getSimpleName());
-            ex.printStackTrace();
-        }
     }
 }

core/src/main/java/org/geysermc/geyser/event/type/DefineCustomItemsEvent.java

@@ -0,0 +1,85 @@
+/*
+ * Copyright (c) 2019-2022 GeyserMC. http://geysermc.org
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ *
+ * @author GeyserMC
+ * @link https://github.com/GeyserMC/Geyser
+ */
+
+package org.geysermc.geyser.event.type;
+
+import com.google.common.collect.Multimap;
+import org.checkerframework.checker.nullness.qual.NonNull;
+import org.geysermc.geyser.api.event.lifecycle.GeyserDefineCustomItemsEvent;
+import org.geysermc.geyser.api.item.custom.CustomItemData;
+import org.geysermc.geyser.api.item.custom.NonVanillaCustomItemData;
+
+import java.util.Collection;
+import java.util.Collections;
+import java.util.List;
+import java.util.Map;
+
+public abstract class DefineCustomItemsEvent implements GeyserDefineCustomItemsEvent {
+    private final Multimap<String, CustomItemData> customItems;
+    private final List<NonVanillaCustomItemData> nonVanillaCustomItems;
+
+    public DefineCustomItemsEvent(Multimap<String, CustomItemData> customItems, List<NonVanillaCustomItemData> nonVanillaCustomItems) {
+        this.customItems = customItems;
+        this.nonVanillaCustomItems = nonVanillaCustomItems;
+    }
+
+    /**
+     * Gets a multimap of all the already registered custom items indexed by the item's extended java item's identifier.
+     *
+     * @return a multimap of all the already registered custom items
+     */
+    @Override
+    public Map<String, Collection<CustomItemData>> getExistingCustomItems() {
+        return Collections.unmodifiableMap(this.customItems.asMap());
+    }
+
+    /**
+     * Gets the list of the already registered non-vanilla custom items.
+     *
+     * @return the list of the already registered non-vanilla custom items
+     */
+    @Override
+    public List<NonVanillaCustomItemData> getExistingNonVanillaCustomItems() {
+        return Collections.unmodifiableList(this.nonVanillaCustomItems);
+    }
+
+    /**
+     * Registers a custom item with a base Java item. This is used to register items with custom textures and properties
+     * based on NBT data.
+     *
+     * @param identifier the base (java) item
+     * @param customItemData the custom item data to register
+     * @return if the item was registered
+     */
+    public abstract boolean register(@NonNull String identifier, @NonNull CustomItemData customItemData);
+
+    /**
+     * Registers a custom item with no base item. This is used for mods.
+     *
+     * @param customItemData the custom item data to register
+     * @return if the item was registered
+     */
+    public abstract boolean register(@NonNull NonVanillaCustomItemData customItemData);
+}

core/src/main/java/org/geysermc/geyser/extension/event/GeyserExtensionEventBus.java

@@ -26,62 +26,50 @@
 package org.geysermc.geyser.extension.event;
 
 import org.checkerframework.checker.nullness.qual.NonNull;
-import org.geysermc.geyser.api.event.Event;
+import org.geysermc.event.Event;
+import org.geysermc.event.bus.impl.EventBusImpl;
+import org.geysermc.event.subscribe.Subscribe;
+import org.geysermc.event.subscribe.Subscriber;
 import org.geysermc.geyser.api.event.EventBus;
-import org.geysermc.geyser.api.event.EventSubscription;
+import org.geysermc.geyser.api.event.EventSubscriber;
 import org.geysermc.geyser.api.event.ExtensionEventBus;
+import org.geysermc.geyser.api.event.ExtensionEventSubscriber;
 import org.geysermc.geyser.api.extension.Extension;
 
 import java.util.Set;
+import java.util.function.BiConsumer;
 import java.util.function.Consumer;
 
-public record GeyserExtensionEventBus(EventBus eventBus,
+public record GeyserExtensionEventBus(EventBus eventBus, Extension extension) implements ExtensionEventBus {
-                                      Extension extension) implements ExtensionEventBus {
-    @NonNull
     @Override
-    public <T extends Event> EventSubscription<T> subscribe(@NonNull Class<T> eventClass, @NonNull Consumer<? super T> consumer) {
+    public void unsubscribe(@NonNull EventSubscriber<? extends Event> subscription) {
-        return this.eventBus.subscribe(this.extension, eventClass, consumer);
+        eventBus.unsubscribe(subscription);
-    }
-
-    @Override
-    public void register(@NonNull Object eventHolder) {
-        this.eventBus.register(this.extension, eventHolder);
-    }
-
-    @Override
-    public void unregisterAll() {
-        this.eventBus.unregisterAll(this.extension);
-    }
-
-    @NonNull
-    @Override
-    public <T extends Event> EventSubscription<T> subscribe(@NonNull Extension extension, @NonNull Class<T> eventClass, @NonNull Consumer<? super T> consumer) {
-        return this.eventBus.subscribe(extension, eventClass, consumer);
-    }
-
-    @Override
-    public <T extends Event> void unsubscribe(@NonNull EventSubscription<T> subscription) {
-        this.eventBus.unsubscribe(subscription);
-    }
-
-    @Override
-    public void register(@NonNull Extension extension, @NonNull Object eventHolder) {
-        this.eventBus.register(extension, eventHolder);
-    }
-
-    @Override
-    public void unregisterAll(@NonNull Extension extension) {
-        this.eventBus.unregisterAll(extension);
     }
 
     @Override
     public boolean fire(@NonNull Event event) {
-        return this.eventBus.fire(event);
+        return eventBus.fire(event);
     }
 
-    @NonNull
     @Override
-    public <T extends Event> Set<EventSubscription<T>> subscriptions(@NonNull Class<T> eventClass) {
+    public @NonNull <T extends Event> Set<? extends EventSubscriber<T>> subscribers(@NonNull Class<T> eventClass) {
-        return this.eventBus.subscriptions(eventClass);
+        return eventBus.subscribers(eventClass);
+    }
+
+    @Override
+    public void register(@NonNull Object listener) {
+        eventBus.register(extension, listener);
+    }
+
+    @Override
+    @SuppressWarnings("unchecked")
+    public <T extends Event, U extends Subscriber<T>> @NonNull U subscribe(
+            @NonNull Class<T> eventClass, @NonNull Consumer<T> consumer) {
+        return eventBus.subscribe(extension, eventClass, consumer);
+    }
+
+    @Override
+    public void unregisterAll() {
+        eventBus.unregisterAll(extension);
     }
 }

core/src/main/java/org/geysermc/geyser/registry/populator/ItemRegistryPopulator.java

@@ -52,6 +52,7 @@ import org.geysermc.geyser.api.event.lifecycle.GeyserDefineCustomItemsEvent;
 import org.geysermc.geyser.api.item.custom.CustomItemData;
 import org.geysermc.geyser.api.item.custom.CustomItemOptions;
 import org.geysermc.geyser.api.item.custom.NonVanillaCustomItemData;
+import org.geysermc.geyser.event.type.DefineCustomItemsEvent;
 import org.geysermc.geyser.inventory.item.StoredItemMappings;
 import org.geysermc.geyser.item.GeyserCustomMappingData;
 import org.geysermc.geyser.item.mappings.MappingsConfigReader;
@@ -108,7 +109,7 @@ public class ItemRegistryPopulator {
             });
 
             nonVanillaCustomItems = new ObjectArrayList<>();
-            GeyserImpl.getInstance().eventBus().fire(new GeyserDefineCustomItemsEvent(customItems, nonVanillaCustomItems) {
+            GeyserImpl.getInstance().eventBus().fire(new DefineCustomItemsEvent(customItems, nonVanillaCustomItems) {
                 @Override
                 public boolean register(@NonNull String identifier, @NonNull CustomItemData customItemData) {
                     if (CustomItemRegistryPopulator.initialCheck(identifier, customItemData, items)) {