mirror of
https://github.com/PaperMC/Waterfall.git
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273 lines
10 KiB
Diff
273 lines
10 KiB
Diff
From 86c5823b0bfdfc21e38850b46bb486c4e10e940c Mon Sep 17 00:00:00 2001
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From: Techcable <Techcable@outlook.com>
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Date: Sun, 28 Feb 2016 22:46:22 -0700
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Subject: [PATCH] Use ASM for events, via the Event4J library
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According to benchmarks, this is about 7 nanoseconds faster than reflection (34 ns -> 27 ns).
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Event4J falls back to Java 8's new MethodHandle if the event method isn't public.
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diff --git a/event/pom.xml b/event/pom.xml
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index b6ef990..ff72600 100644
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--- a/event/pom.xml
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+++ b/event/pom.xml
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@@ -17,4 +17,24 @@
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<name>Waterfall-Event</name>
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<description>Generic java event dispatching API intended for use with Waterfall.</description>
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+
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+ <dependencies>
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+ <dependency>
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+ <groupId>net.techcable</groupId>
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+ <artifactId>event4j</artifactId>
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+ <version>1.1.0</version>
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+ </dependency>
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+ <dependency>
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+ <groupId>org.ow2.asm</groupId>
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+ <artifactId>asm-all</artifactId>
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+ <version>5.0.4</version>
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+ </dependency>
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+ </dependencies>
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+
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+ <repositories>
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+ <repository>
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+ <id>techcable-repo</id>
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+ <url>https://repo.techcable.net/content/groups/public/</url>
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+ </repository>
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+ </repositories>
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</project>
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diff --git a/event/src/main/java/net/md_5/bungee/event/EventBus.java b/event/src/main/java/net/md_5/bungee/event/EventBus.java
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index 5b5d420..c93aa16 100644
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--- a/event/src/main/java/net/md_5/bungee/event/EventBus.java
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+++ b/event/src/main/java/net/md_5/bungee/event/EventBus.java
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@@ -1,26 +1,13 @@
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package net.md_5.bungee.event;
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-import java.lang.reflect.InvocationTargetException;
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-import java.lang.reflect.Method;
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-import java.text.MessageFormat;
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-import java.util.ArrayList;
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-import java.util.HashMap;
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-import java.util.HashSet;
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-import java.util.List;
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-import java.util.Map;
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-import java.util.Set;
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-import java.util.concurrent.ConcurrentHashMap;
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-import java.util.concurrent.locks.Lock;
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-import java.util.concurrent.locks.ReentrantLock;
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-import java.util.logging.Level;
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import java.util.logging.Logger;
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public class EventBus
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{
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- private final Map<Class<?>, Map<Byte, Map<Object, Method[]>>> byListenerAndPriority = new HashMap<>();
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- private final Map<Class<?>, EventHandlerMethod[]> byEventBaked = new ConcurrentHashMap<>();
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- private final Lock lock = new ReentrantLock();
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+ private final net.techcable.event4j.EventBus<Object, Object> event4JBus = net.techcable.event4j.EventBus.builder()
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+ .eventMarker((m) -> m.isAnnotationPresent(EventHandler.class) ? m.getAnnotation(EventHandler.class)::priority : null)
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+ .build();
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private final Logger logger;
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public EventBus()
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@@ -35,167 +22,16 @@ public class EventBus
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public void post(Object event)
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{
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- EventHandlerMethod[] handlers = byEventBaked.get( event.getClass() );
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-
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- if ( handlers != null )
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- {
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- for ( EventHandlerMethod method : handlers )
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- {
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- try
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- {
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- method.invoke( event );
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- } catch ( IllegalAccessException ex )
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- {
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- throw new Error( "Method became inaccessible: " + event, ex );
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- } catch ( IllegalArgumentException ex )
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- {
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- throw new Error( "Method rejected target/argument: " + event, ex );
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- } catch ( InvocationTargetException ex )
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- {
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- logger.log( Level.WARNING, MessageFormat.format( "Error dispatching event {0} to listener {1}", event, method.getListener() ), ex.getCause() );
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- }
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- }
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- }
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- }
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-
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- private Map<Class<?>, Map<Byte, Set<Method>>> findHandlers(Object listener)
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- {
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- Map<Class<?>, Map<Byte, Set<Method>>> handler = new HashMap<>();
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- for ( Method m : listener.getClass().getDeclaredMethods() )
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- {
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- EventHandler annotation = m.getAnnotation( EventHandler.class );
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- if ( annotation != null )
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- {
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- Class<?>[] params = m.getParameterTypes();
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- if ( params.length != 1 )
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- {
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- logger.log( Level.INFO, "Method {0} in class {1} annotated with {2} does not have single argument", new Object[]
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- {
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- m, listener.getClass(), annotation
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- } );
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- continue;
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- }
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- Map<Byte, Set<Method>> prioritiesMap = handler.get( params[0] );
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- if ( prioritiesMap == null )
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- {
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- prioritiesMap = new HashMap<>();
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- handler.put( params[0], prioritiesMap );
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- }
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- Set<Method> priority = prioritiesMap.get( annotation.priority() );
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- if ( priority == null )
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- {
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- priority = new HashSet<>();
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- prioritiesMap.put( annotation.priority(), priority );
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- }
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- priority.add( m );
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- }
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- }
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- return handler;
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+ event4JBus.fire(event);
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}
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public void register(Object listener)
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{
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- Map<Class<?>, Map<Byte, Set<Method>>> handler = findHandlers( listener );
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- lock.lock();
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- try
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- {
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- for ( Map.Entry<Class<?>, Map<Byte, Set<Method>>> e : handler.entrySet() )
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- {
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- Map<Byte, Map<Object, Method[]>> prioritiesMap = byListenerAndPriority.get( e.getKey() );
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- if ( prioritiesMap == null )
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- {
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- prioritiesMap = new HashMap<>();
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- byListenerAndPriority.put( e.getKey(), prioritiesMap );
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- }
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- for ( Map.Entry<Byte, Set<Method>> entry : e.getValue().entrySet() )
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- {
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- Map<Object, Method[]> currentPriorityMap = prioritiesMap.get( entry.getKey() );
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- if ( currentPriorityMap == null )
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- {
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- currentPriorityMap = new HashMap<>();
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- prioritiesMap.put( entry.getKey(), currentPriorityMap );
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- }
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- Method[] baked = new Method[ entry.getValue().size() ];
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- currentPriorityMap.put( listener, entry.getValue().toArray( baked ) );
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- }
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- bakeHandlers( e.getKey() );
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- }
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- } finally
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- {
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- lock.unlock();
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- }
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+ event4JBus.register(listener);
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}
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public void unregister(Object listener)
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{
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- Map<Class<?>, Map<Byte, Set<Method>>> handler = findHandlers( listener );
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- lock.lock();
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- try
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- {
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- for ( Map.Entry<Class<?>, Map<Byte, Set<Method>>> e : handler.entrySet() )
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- {
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- Map<Byte, Map<Object, Method[]>> prioritiesMap = byListenerAndPriority.get( e.getKey() );
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- if ( prioritiesMap != null )
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- {
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- for ( Byte priority : e.getValue().keySet() )
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- {
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- Map<Object, Method[]> currentPriority = prioritiesMap.get( priority );
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- if ( currentPriority != null )
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- {
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- currentPriority.remove( listener );
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- if ( currentPriority.isEmpty() )
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- {
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- prioritiesMap.remove( priority );
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- }
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- }
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- }
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- if ( prioritiesMap.isEmpty() )
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- {
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- byListenerAndPriority.remove( e.getKey() );
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- }
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- }
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- bakeHandlers( e.getKey() );
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- }
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- } finally
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- {
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- lock.unlock();
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- }
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- }
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-
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- /**
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- * Shouldn't be called without first locking the writeLock; intended for use
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- * only inside {@link #register(java.lang.Object) register(Object)} or
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- * {@link #unregister(java.lang.Object) unregister(Object)}.
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- */
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- private void bakeHandlers(Class<?> eventClass)
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- {
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- Map<Byte, Map<Object, Method[]>> handlersByPriority = byListenerAndPriority.get( eventClass );
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- if ( handlersByPriority != null )
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- {
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- List<EventHandlerMethod> handlersList = new ArrayList<>( handlersByPriority.size() * 2 );
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-
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- // Either I'm really tired, or the only way we can iterate between Byte.MIN_VALUE and Byte.MAX_VALUE inclusively,
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- // with only a byte on the stack is by using a do {} while() format loop.
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- byte value = Byte.MIN_VALUE;
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- do
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- {
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- Map<Object, Method[]> handlersByListener = handlersByPriority.get( value );
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- if ( handlersByListener != null )
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- {
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- for ( Map.Entry<Object, Method[]> listenerHandlers : handlersByListener.entrySet() )
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- {
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- for ( Method method : listenerHandlers.getValue() )
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- {
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- EventHandlerMethod ehm = new EventHandlerMethod( listenerHandlers.getKey(), method );
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- handlersList.add( ehm );
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- }
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- }
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- }
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- } while ( value++ < Byte.MAX_VALUE );
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- byEventBaked.put( eventClass, handlersList.toArray( new EventHandlerMethod[ handlersList.size() ] ) );
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- } else
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- {
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- byEventBaked.remove( eventClass );
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- }
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+ event4JBus.unregister(listener);
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}
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}
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diff --git a/event/src/main/java/net/md_5/bungee/event/EventHandlerMethod.java b/event/src/main/java/net/md_5/bungee/event/EventHandlerMethod.java
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deleted file mode 100644
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index ad19c02..0000000
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--- a/event/src/main/java/net/md_5/bungee/event/EventHandlerMethod.java
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+++ /dev/null
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@@ -1,21 +0,0 @@
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-package net.md_5.bungee.event;
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-
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-import java.lang.reflect.InvocationTargetException;
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-import java.lang.reflect.Method;
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-import lombok.AllArgsConstructor;
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-import lombok.Getter;
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-
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-@AllArgsConstructor
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-public class EventHandlerMethod
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-{
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-
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- @Getter
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- private final Object listener;
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- @Getter
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- private final Method method;
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-
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- public void invoke(Object event) throws IllegalAccessException, IllegalArgumentException, InvocationTargetException
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- {
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- method.invoke( listener, event );
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- }
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-}
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--
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2.8.3
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