From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001 From: Nassim Jahnke Date: Thu, 29 Apr 2021 21:19:33 +0200 Subject: [PATCH] Add Channel initialization listeners diff --git a/src/main/java/io/papermc/paper/network/ChannelInitializeListener.java b/src/main/java/io/papermc/paper/network/ChannelInitializeListener.java new file mode 100644 index 0000000000000000000000000000000000000000..88099df34c2d74daba9645aadf65b446ca795a91 --- /dev/null +++ b/src/main/java/io/papermc/paper/network/ChannelInitializeListener.java @@ -0,0 +1,15 @@ +package io.papermc.paper.network; + +import io.netty.channel.Channel; +import org.checkerframework.checker.nullness.qual.NonNull; + +/** + * Internal API to register channel initialization listeners. + *

+ * This is not officially supported API and we make no guarantees to the existence or state of this interface. + */ +@FunctionalInterface +public interface ChannelInitializeListener { + + void afterInitChannel(@NonNull Channel channel); +} diff --git a/src/main/java/io/papermc/paper/network/ChannelInitializeListenerHolder.java b/src/main/java/io/papermc/paper/network/ChannelInitializeListenerHolder.java new file mode 100644 index 0000000000000000000000000000000000000000..30e62719e0a83525daa33cf41cb61df360c0e046 --- /dev/null +++ b/src/main/java/io/papermc/paper/network/ChannelInitializeListenerHolder.java @@ -0,0 +1,74 @@ +package io.papermc.paper.network; + +import io.netty.channel.Channel; +import net.kyori.adventure.key.Key; +import org.checkerframework.checker.nullness.qual.NonNull; +import org.checkerframework.checker.nullness.qual.Nullable; + +import java.util.Collections; +import java.util.HashMap; +import java.util.Map; + +/** + * Internal API to register channel initialization listeners. + *

+ * This is not officially supported API and we make no guarantees to the existence or state of this class. + */ +public final class ChannelInitializeListenerHolder { + + private static final Map LISTENERS = new HashMap<>(); + private static final Map IMMUTABLE_VIEW = Collections.unmodifiableMap(LISTENERS); + + private ChannelInitializeListenerHolder() { + } + + /** + * Registers whether an initialization listener is registered under the given key. + * + * @param key key + * @return whether an initialization listener is registered under the given key + */ + public static boolean hasListener(@NonNull Key key) { + return LISTENERS.containsKey(key); + } + + /** + * Registers a channel initialization listener called after ServerConnection is initialized. + * + * @param key key + * @param listener initialization listeners + */ + public static void addListener(@NonNull Key key, @NonNull ChannelInitializeListener listener) { + LISTENERS.put(key, listener); + } + + /** + * Removes and returns an initialization listener registered by the given key if present. + * + * @param key key + * @return removed initialization listener if present + */ + public static @Nullable ChannelInitializeListener removeListener(@NonNull Key key) { + return LISTENERS.remove(key); + } + + /** + * Returns an immutable map of registered initialization listeners. + * + * @return immutable map of registered initialization listeners + */ + public static @NonNull Map getListeners() { + return IMMUTABLE_VIEW; + } + + /** + * Calls the registered listeners with the given channel. + * + * @param channel channel + */ + public static void callListeners(@NonNull Channel channel) { + for (ChannelInitializeListener listener : LISTENERS.values()) { + listener.afterInitChannel(channel); + } + } +} diff --git a/src/main/java/io/papermc/paper/network/ConnectionEvent.java b/src/main/java/io/papermc/paper/network/ConnectionEvent.java new file mode 100644 index 0000000000000000000000000000000000000000..0d7e7db9e37ef0183c32b217bd944fb4f41ab83a --- /dev/null +++ b/src/main/java/io/papermc/paper/network/ConnectionEvent.java @@ -0,0 +1,10 @@ +package io.papermc.paper.network; + +/** + * Internal connection pipeline events. + */ +public enum ConnectionEvent { + + COMPRESSION_THRESHOLD_SET, + COMPRESSION_DISABLED +} diff --git a/src/main/java/net/minecraft/network/Connection.java b/src/main/java/net/minecraft/network/Connection.java index ba41646a5edb57c4d9766df08bbc57016e2de189..2b86415e4ea197c5c44c23072c9a1cda595544a8 100644 --- a/src/main/java/net/minecraft/network/Connection.java +++ b/src/main/java/net/minecraft/network/Connection.java @@ -680,6 +680,7 @@ public class Connection extends SimpleChannelInboundHandler> { } else { this.channel.pipeline().addAfter("prepender", "compress", new CompressionEncoder(compressionThreshold)); } + this.channel.pipeline().fireUserEventTriggered(io.papermc.paper.network.ConnectionEvent.COMPRESSION_THRESHOLD_SET); // Paper - Add Channel initialization listeners } else { if (this.channel.pipeline().get("decompress") instanceof CompressionDecoder) { this.channel.pipeline().remove("decompress"); @@ -688,6 +689,7 @@ public class Connection extends SimpleChannelInboundHandler> { if (this.channel.pipeline().get("compress") instanceof CompressionEncoder) { this.channel.pipeline().remove("compress"); } + this.channel.pipeline().fireUserEventTriggered(io.papermc.paper.network.ConnectionEvent.COMPRESSION_DISABLED); // Paper - Add Channel initialization listeners } } diff --git a/src/main/java/net/minecraft/server/network/ServerConnectionListener.java b/src/main/java/net/minecraft/server/network/ServerConnectionListener.java index 64119f2188f8958b8a5913fec82ac5bba1b74b2a..d6d7f1c446ba5507f67038ff27775ba75156f4a7 100644 --- a/src/main/java/net/minecraft/server/network/ServerConnectionListener.java +++ b/src/main/java/net/minecraft/server/network/ServerConnectionListener.java @@ -115,6 +115,7 @@ public class ServerConnectionListener { pending.add(object); // Paper - prevent blocking on adding a new connection while the server is ticking ((Connection) object).configurePacketHandler(channelpipeline); ((Connection) object).setListenerForServerboundHandshake(new ServerHandshakePacketListenerImpl(ServerConnectionListener.this.server, (Connection) object)); + io.papermc.paper.network.ChannelInitializeListenerHolder.callListeners(channel); // Paper - Add Channel initialization listeners } }).group(eventloopgroup).localAddress(address, port)).option(ChannelOption.AUTO_READ, false).bind().syncUninterruptibly()); // CraftBukkit }