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https://github.com/PaperMC/Paper.git
synchronisiert 2024-11-15 04:20:04 +01:00
Add /paper dumplisteners command (#8507)
Co-authored-by: Jason Penilla <11360596+jpenilla@users.noreply.github.com> Co-authored-by: TwoLeggedCat <80929284+TwoLeggedCat@users.noreply.github.com>
Dieser Commit ist enthalten in:
Warrior
GitHub
Ursprung
da230d521c
Commit
8aff07afb0
37
patches/api/0409-Add-paper-dumplisteners-command.patch
Normale Datei
37
patches/api/0409-Add-paper-dumplisteners-command.patch
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@ -0,0 +1,37 @@
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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Warrior <50800980+Warriorrrr@users.noreply.github.com>
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Date: Sat, 19 Nov 2022 19:46:44 +0100
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Subject: [PATCH] Add /paper dumplisteners command
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diff --git a/src/main/java/org/bukkit/event/HandlerList.java b/src/main/java/org/bukkit/event/HandlerList.java
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index ed78cca71f83b296d082d0af147ca8d622c7606a..2292bd460ce2be113beb4ba6b4eb19350060f01c 100644
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--- a/src/main/java/org/bukkit/event/HandlerList.java
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+++ b/src/main/java/org/bukkit/event/HandlerList.java
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@@ -33,6 +33,13 @@ public class HandlerList {
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*/
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private static ArrayList<HandlerList> allLists = new ArrayList<HandlerList>();
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+ // Paper start
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+ /**
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+ * Event types which have instantiated a {@link HandlerList}.
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+ */
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+ private static final java.util.Set<String> EVENT_TYPES = java.util.concurrent.ConcurrentHashMap.newKeySet();
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+ // Paper end
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+
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/**
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* Bake all handler lists. Best used just after all normal event
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* registration is complete, ie just after all plugins are loaded if
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@@ -94,6 +101,12 @@ public class HandlerList {
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* The HandlerList is then added to meta-list for use in bakeAll()
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*/
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public HandlerList() {
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+ // Paper start
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+ java.lang.StackWalker.getInstance(java.util.EnumSet.of(java.lang.StackWalker.Option.RETAIN_CLASS_REFERENCE), 4)
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+ .walk(s -> s.filter(f -> Event.class.isAssignableFrom(f.getDeclaringClass())).findFirst())
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+ .map(f -> f.getDeclaringClass().getName())
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+ .ifPresent(EVENT_TYPES::add);
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+ // Paper end
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handlerslots = new EnumMap<EventPriority, ArrayList<RegisteredListener>>(EventPriority.class);
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for (EventPriority o : EventPriority.values()) {
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handlerslots.put(o, new ArrayList<RegisteredListener>());
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153
patches/server/0943-Add-paper-dumplisteners-command.patch
Normale Datei
153
patches/server/0943-Add-paper-dumplisteners-command.patch
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@ -0,0 +1,153 @@
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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Warrior <50800980+Warriorrrr@users.noreply.github.com>
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Date: Tue, 25 Oct 2022 21:15:37 +0200
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Subject: [PATCH] Add /paper dumplisteners command
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Co-authored-by: TwoLeggedCat <80929284+TwoLeggedCat@users.noreply.github.com>
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diff --git a/src/main/java/io/papermc/paper/command/PaperCommand.java b/src/main/java/io/papermc/paper/command/PaperCommand.java
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index 724592234e2a178a518f6ab7d09c3180780371a7..92154550b41b2e1d03deb1271b71bb3baa735e0a 100644
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--- a/src/main/java/io/papermc/paper/command/PaperCommand.java
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+++ b/src/main/java/io/papermc/paper/command/PaperCommand.java
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@@ -2,6 +2,7 @@ package io.papermc.paper.command;
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import io.papermc.paper.command.subcommands.ChunkDebugCommand;
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import io.papermc.paper.command.subcommands.DumpItemCommand;
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+import io.papermc.paper.command.subcommands.DumpListenersCommand;
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import io.papermc.paper.command.subcommands.EntityCommand;
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import io.papermc.paper.command.subcommands.FixLightCommand;
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import io.papermc.paper.command.subcommands.HeapDumpCommand;
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@@ -50,6 +51,7 @@ public final class PaperCommand extends Command {
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commands.put(Set.of("syncloadinfo"), new SyncLoadInfoCommand());
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commands.put(Set.of("dumpitem"), new DumpItemCommand());
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commands.put(Set.of("mobcaps", "playermobcaps"), new MobcapsCommand());
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+ commands.put(Set.of("dumplisteners"), new DumpListenersCommand());
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return commands.entrySet().stream()
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.flatMap(entry -> entry.getKey().stream().map(s -> Map.entry(s, entry.getValue())))
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diff --git a/src/main/java/io/papermc/paper/command/subcommands/DumpListenersCommand.java b/src/main/java/io/papermc/paper/command/subcommands/DumpListenersCommand.java
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new file mode 100644
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index 0000000000000000000000000000000000000000..dab8d6fb489f8b3acc7c8fdaa1b5b6b83fa0eeb4
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--- /dev/null
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+++ b/src/main/java/io/papermc/paper/command/subcommands/DumpListenersCommand.java
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@@ -0,0 +1,120 @@
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+package io.papermc.paper.command.subcommands;
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+
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+import com.destroystokyo.paper.util.SneakyThrow;
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+import io.papermc.paper.command.PaperSubcommand;
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+import java.lang.invoke.MethodHandle;
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+import java.lang.invoke.MethodHandles;
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+import java.lang.reflect.Field;
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+import java.util.Collections;
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+import java.util.List;
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+import java.util.Locale;
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+import java.util.Set;
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+import java.util.stream.Stream;
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+import net.minecraft.server.MinecraftServer;
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+import org.bukkit.Bukkit;
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+import org.bukkit.command.CommandSender;
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+import org.bukkit.event.HandlerList;
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+import org.bukkit.plugin.Plugin;
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+import org.checkerframework.checker.nullness.qual.NonNull;
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+import org.checkerframework.framework.qual.DefaultQualifier;
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+
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+import static net.kyori.adventure.text.Component.space;
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+import static net.kyori.adventure.text.Component.text;
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+import static net.kyori.adventure.text.format.NamedTextColor.GRAY;
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+import static net.kyori.adventure.text.format.NamedTextColor.GREEN;
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+import static net.kyori.adventure.text.format.NamedTextColor.RED;
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+
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+@DefaultQualifier(NonNull.class)
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+public final class DumpListenersCommand implements PaperSubcommand {
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+ private static final MethodHandle EVENT_TYPES_HANDLE;
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+
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+ static {
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+ try {
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+ final Field eventTypesField = HandlerList.class.getDeclaredField("EVENT_TYPES");
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+ eventTypesField.setAccessible(true);
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+ EVENT_TYPES_HANDLE = MethodHandles.lookup().unreflectGetter(eventTypesField);
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+ } catch (final ReflectiveOperationException e) {
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+ throw new RuntimeException(e);
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+ }
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+ }
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+
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+ @Override
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+ public boolean execute(final CommandSender sender, final String subCommand, final String[] args) {
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+ this.doDumpListeners(sender, args);
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+ return true;
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+ }
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+
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+ private void doDumpListeners(final CommandSender sender, final String[] args) {
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+ if (args.length == 0) {
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+ sender.sendMessage(text("Usage: /paper dumplisteners [className]", RED));
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+ return;
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+ }
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+
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+ try {
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+ final HandlerList handlers = (HandlerList) findClass(args[0]).getMethod("getHandlerList").invoke(null);
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+
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+ if (handlers.getRegisteredListeners().length == 0) {
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+ sender.sendMessage(text(args[0] + " does not have any registered listeners."));
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+ return;
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+ }
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+
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+ sender.sendMessage(text("Listeners for " + args[0] + ":"));
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+
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+ Stream.of(handlers.getRegisteredListeners())
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+ .map(listener -> text(listener.getPlugin().getName(), GREEN)
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+ .append(space())
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+ .append(text("(" + listener.getListener().getClass().getName() + ")", GRAY)
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+ .hoverEvent(text("Priority: " + listener.getPriority().name() + " (" + listener.getPriority().getSlot() + ")", GRAY))))
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+ .forEach(sender::sendMessage);
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+
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+ sender.sendMessage(text("Total listeners: " + handlers.getRegisteredListeners().length));
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+
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+ } catch (final ClassNotFoundException e) {
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+ sender.sendMessage(text("Unable to find a class named '" + args[0] + "'. Make sure to use the fully qualified name.", RED));
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+ } catch (final NoSuchMethodException e) {
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+ sender.sendMessage(text("Class '" + args[0] + "' does not have a valid getHandlerList method.", RED));
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+ } catch (final ReflectiveOperationException e) {
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+ sender.sendMessage(text("Something went wrong, see the console for more details.", RED));
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+ MinecraftServer.LOGGER.warn("Error occurred while dumping listeners for class " + args[0], e);
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+ }
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+ }
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+
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+ @Override
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+ public List<String> tabComplete(final CommandSender sender, final String subCommand, final String[] args) {
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+ return switch (args.length) {
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+ case 0 -> List.copyOf(getEventClasses());
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+ case 1 -> getEventClasses().stream()
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+ .filter(clazz -> clazz.toLowerCase(Locale.ROOT).contains(args[0].toLowerCase(Locale.ROOT)))
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+ .toList();
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+ default -> Collections.emptyList();
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+ };
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+ }
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+
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+ @SuppressWarnings("unchecked")
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+ private static Set<String> getEventClasses() {
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+ try {
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+ return (Set<String>) EVENT_TYPES_HANDLE.invokeExact();
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+ } catch (final Throwable e) {
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+ SneakyThrow.sneaky(e);
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+ return Collections.emptySet(); // Unreachable
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+ }
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+ }
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+
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+ private static Class<?> findClass(final String className) throws ClassNotFoundException {
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+ try {
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+ return Class.forName(className);
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+ } catch (final ClassNotFoundException ignore) {
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+ for (final Plugin plugin : Bukkit.getServer().getPluginManager().getPlugins()) {
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+ if (!plugin.isEnabled()) {
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+ continue;
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+ }
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+
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+ try {
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+ return Class.forName(className, false, plugin.getClass().getClassLoader());
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+ } catch (final ClassNotFoundException ignore0) {
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+ }
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+ }
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+ }
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+ throw new ClassNotFoundException(className);
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+ }
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+}
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