Add home grown event bus
This commit is contained in:
md_5
parent
aefe3333a9
commit
21a354fa75
@ -31,6 +31,12 @@
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<version>1.7.14</version>
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<scope>compile</scope>
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</dependency>
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<dependency>
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<groupId>net.md-5</groupId>
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<artifactId>bungeecord-event</artifactId>
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<version>${project.version}</version>
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<scope>compile</scope>
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</dependency>
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<dependency>
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<groupId>org.yaml</groupId>
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<artifactId>snakeyaml</artifactId>
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@ -1,111 +0,0 @@
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/*
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* Copyright (C) 2007 The Guava Authors
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.google.common.eventbus;
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import com.google.common.base.Throwables;
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import com.google.common.cache.CacheBuilder;
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import com.google.common.cache.CacheLoader;
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import com.google.common.cache.LoadingCache;
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import com.google.common.collect.HashMultimap;
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import com.google.common.collect.ImmutableList;
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import com.google.common.collect.Multimap;
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import com.google.common.reflect.TypeToken;
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import com.google.common.util.concurrent.UncheckedExecutionException;
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import java.lang.reflect.Method;
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import java.util.Set;
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/**
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* A {@link HandlerFindingStrategy} for collecting all event handler methods that are marked with
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* the {@link Subscribe} annotation.
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*
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* @author Cliff Biffle
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* @author Louis Wasserman
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*/
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class AnnotatedHandlerFinder implements HandlerFindingStrategy {
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/**
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* A thread-safe cache that contains the mapping from each class to all methods in that class and
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* all super-classes, that are annotated with {@code @Subscribe}. The cache is shared across all
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* instances of this class; this greatly improves performance if multiple EventBus instances are
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* created and objects of the same class are registered on all of them.
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*/
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private static final LoadingCache<Class<?>, ImmutableList<Method>> handlerMethodsCache =
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CacheBuilder.newBuilder()
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.weakKeys()
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.build(new CacheLoader<Class<?>, ImmutableList<Method>>() {
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@Override
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public ImmutableList<Method> load(Class<?> concreteClass) throws Exception {
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return getAnnotatedMethodsInternal(concreteClass);
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}
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});
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/**
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* {@inheritDoc}
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*
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* This implementation finds all methods marked with a {@link Subscribe} annotation.
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*/
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@Override
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public Multimap<Class<?>, EventHandler> findAllHandlers(Object listener) {
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Multimap<Class<?>, EventHandler> methodsInListener = HashMultimap.create();
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Class<?> clazz = listener.getClass();
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for (Method method : getAnnotatedMethods(clazz)) {
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Class<?>[] parameterTypes = method.getParameterTypes();
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Class<?> eventType = parameterTypes[0];
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EventHandler handler = new EventHandler(listener, method);
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methodsInListener.put(eventType, handler);
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}
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return methodsInListener;
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}
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private static ImmutableList<Method> getAnnotatedMethods(Class<?> clazz) {
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try {
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return handlerMethodsCache.getUnchecked(clazz);
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} catch (UncheckedExecutionException e) {
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throw Throwables.propagate(e.getCause());
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}
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}
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private static ImmutableList<Method> getAnnotatedMethodsInternal(Class<?> clazz) {
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Set<? extends Class<?>> supers = TypeToken.of(clazz).getTypes().rawTypes();
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ImmutableList.Builder<Method> result = ImmutableList.builder();
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for (Method method : clazz.getMethods()) {
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/*
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* Iterate over each distinct method of {@code clazz}, checking if it is annotated with
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* @Subscribe by any of the superclasses or superinterfaces that declare it.
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*/
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for (Class<?> c : supers) {
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try {
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Method m = c.getMethod(method.getName(), method.getParameterTypes());
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if (m.isAnnotationPresent(Subscribe.class)) {
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Class<?>[] parameterTypes = method.getParameterTypes();
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if (parameterTypes.length != 1) {
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throw new IllegalArgumentException("Method " + method
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+ " has @Subscribe annotation, but requires " + parameterTypes.length
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+ " arguments. Event handler methods must require a single argument.");
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}
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Class<?> eventType = parameterTypes[0];
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result.add(method);
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break;
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}
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} catch (NoSuchMethodException ignored) {
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// Move on.
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}
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}
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}
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return result.build();
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}
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}
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@ -1,330 +0,0 @@
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/*
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* Copyright (C) 2007 The Guava Authors
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.google.common.eventbus;
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import static com.google.common.base.Preconditions.checkNotNull;
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import com.google.common.annotations.Beta;
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import com.google.common.annotations.VisibleForTesting;
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import com.google.common.base.Throwables;
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import com.google.common.cache.CacheBuilder;
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import com.google.common.cache.CacheLoader;
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import com.google.common.cache.LoadingCache;
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import com.google.common.collect.HashMultimap;
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import com.google.common.collect.Multimap;
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import com.google.common.collect.SetMultimap;
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import com.google.common.reflect.TypeToken;
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import com.google.common.util.concurrent.UncheckedExecutionException;
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import java.lang.reflect.InvocationTargetException;
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import java.util.Collection;
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import java.util.LinkedList;
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import java.util.Map.Entry;
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import java.util.Queue;
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import java.util.Set;
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import java.util.concurrent.locks.ReadWriteLock;
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import java.util.concurrent.locks.ReentrantReadWriteLock;
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import java.util.logging.Level;
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import java.util.logging.Logger;
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/**
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* Dispatches events to listeners, and provides ways for listeners to register
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* themselves.
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*
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* <p>The EventBus allows publish-subscribe-style communication between
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* components without requiring the components to explicitly register with one
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* another (and thus be aware of each other). It is designed exclusively to
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* replace traditional Java in-process event distribution using explicit
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* registration. It is <em>not</em> a general-purpose publish-subscribe system,
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* nor is it intended for interprocess communication.
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*
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* <h2>Receiving Events</h2>
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* To receive events, an object should:<ol>
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* <li>Expose a public method, known as the <i>event handler</i>, which accepts
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* a single argument of the type of event desired;</li>
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* <li>Mark it with a {@link Subscribe} annotation;</li>
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* <li>Pass itself to an EventBus instance's {@link #register(Object)} method.
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* </li>
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* </ol>
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*
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* <h2>Posting Events</h2>
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* To post an event, simply provide the event object to the
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* {@link #post(Object)} method. The EventBus instance will determine the type
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* of event and route it to all registered listeners.
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*
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* <p>Events are routed based on their type — an event will be delivered
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* to any handler for any type to which the event is <em>assignable.</em> This
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* includes implemented interfaces, all superclasses, and all interfaces
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* implemented by superclasses.
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*
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* <p>When {@code post} is called, all registered handlers for an event are run
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* in sequence, so handlers should be reasonably quick. If an event may trigger
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* an extended process (such as a database load), spawn a thread or queue it for
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* later. (For a convenient way to do this, use an {@link AsyncEventBus}.)
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*
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* <h2>Handler Methods</h2>
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* Event handler methods must accept only one argument: the event.
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*
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* <p>Handlers should not, in general, throw. If they do, the EventBus will
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* catch and log the exception. This is rarely the right solution for error
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* handling and should not be relied upon; it is intended solely to help find
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* problems during development.
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*
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* <p>The EventBus guarantees that it will not call a handler method from
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* multiple threads simultaneously, unless the method explicitly allows it by
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* bearing the {@link AllowConcurrentEvents} annotation. If this annotation is
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* not present, handler methods need not worry about being reentrant, unless
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* also called from outside the EventBus.
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*
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* <h2>Dead Events</h2>
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* If an event is posted, but no registered handlers can accept it, it is
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* considered "dead." To give the system a second chance to handle dead events,
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* they are wrapped in an instance of {@link DeadEvent} and reposted.
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*
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* <p>If a handler for a supertype of all events (such as Object) is registered,
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* no event will ever be considered dead, and no DeadEvents will be generated.
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* Accordingly, while DeadEvent extends {@link Object}, a handler registered to
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* receive any Object will never receive a DeadEvent.
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*
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* <p>This class is safe for concurrent use.
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*
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* <p>See the Guava User Guide article on <a href=
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* "http://code.google.com/p/guava-libraries/wiki/EventBusExplained">
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* {@code EventBus}</a>.
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*
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* @author Cliff Biffle
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* @since 10.0
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*/
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@Beta
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public class EventBus {
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/**
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* A thread-safe cache for flattenHierarchy(). The Class class is immutable. This cache is shared
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* across all EventBus instances, which greatly improves performance if multiple such instances
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* are created and objects of the same class are posted on all of them.
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*/
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private static final LoadingCache<Class<?>, Set<Class<?>>> flattenHierarchyCache =
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CacheBuilder.newBuilder()
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.weakKeys()
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.build(new CacheLoader<Class<?>, Set<Class<?>>>() {
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@SuppressWarnings({"unchecked", "rawtypes"}) // safe cast
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@Override
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public Set<Class<?>> load(Class<?> concreteClass) {
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return (Set) TypeToken.of(concreteClass).getTypes().rawTypes();
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}
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});
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/**
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* All registered event handlers, indexed by event type.
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*
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* <p>This SetMultimap is NOT safe for concurrent use; all access should be
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* made after acquiring a read or write lock via {@link #handlersByTypeLock}.
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*/
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private final SetMultimap<Class<?>, EventHandler> handlersByType =
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HashMultimap.create();
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private final ReadWriteLock handlersByTypeLock = new ReentrantReadWriteLock();
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/**
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* Logger for event dispatch failures. Named by the fully-qualified name of
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* this class, followed by the identifier provided at construction.
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*/
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private final Logger logger;
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/**
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* Strategy for finding handler methods in registered objects. Currently,
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* only the {@link AnnotatedHandlerFinder} is supported, but this is
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* encapsulated for future expansion.
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*/
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private final HandlerFindingStrategy finder = new AnnotatedHandlerFinder();
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/** queues of events for the current thread to dispatch */
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private final ThreadLocal<Queue<EventWithHandler>> eventsToDispatch =
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new ThreadLocal<Queue<EventWithHandler>>() {
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@Override protected Queue<EventWithHandler> initialValue() {
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return new LinkedList<EventWithHandler>();
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}
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};
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/**
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* Creates a new EventBus named "default".
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*/
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public EventBus() {
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this("default");
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}
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/**
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* Creates a new EventBus with the given {@code identifier}.
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*
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* @param identifier a brief name for this bus, for logging purposes. Should
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* be a valid Java identifier.
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*/
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public EventBus(String identifier) {
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logger = Logger.getLogger(EventBus.class.getName() + "." + checkNotNull(identifier));
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}
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/**
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* Registers all handler methods on {@code object} to receive events.
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* Handler methods are selected and classified using this EventBus's
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* {@link HandlerFindingStrategy}; the default strategy is the
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* {@link AnnotatedHandlerFinder}.
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*
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* @param object object whose handler methods should be registered.
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*/
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public void register(Object object) {
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Multimap<Class<?>, EventHandler> methodsInListener =
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finder.findAllHandlers(object);
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handlersByTypeLock.writeLock().lock();
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try {
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handlersByType.putAll(methodsInListener);
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} finally {
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handlersByTypeLock.writeLock().unlock();
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}
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}
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/**
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* Unregisters all handler methods on a registered {@code object}.
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*
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* @param object object whose handler methods should be unregistered.
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* @throws IllegalArgumentException if the object was not previously registered.
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*/
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public void unregister(Object object) {
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Multimap<Class<?>, EventHandler> methodsInListener = finder.findAllHandlers(object);
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for (Entry<Class<?>, Collection<EventHandler>> entry : methodsInListener.asMap().entrySet()) {
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Class<?> eventType = entry.getKey();
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Collection<EventHandler> eventMethodsInListener = entry.getValue();
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handlersByTypeLock.writeLock().lock();
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try {
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Set<EventHandler> currentHandlers = handlersByType.get(eventType);
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if (!currentHandlers.containsAll(eventMethodsInListener)) {
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throw new IllegalArgumentException(
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"missing event handler for an annotated method. Is " + object + " registered?");
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}
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currentHandlers.removeAll(eventMethodsInListener);
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} finally {
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handlersByTypeLock.writeLock().unlock();
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}
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}
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}
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/**
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* Posts an event to all registered handlers. This method will return
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* successfully after the event has been posted to all handlers, and
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* regardless of any exceptions thrown by handlers.
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*
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* <p>If no handlers have been subscribed for {@code event}'s class, and
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* {@code event} is not already a {@link DeadEvent}, it will be wrapped in a
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* DeadEvent and reposted.
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*
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* @param event event to post.
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*/
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public void post(Object event) {
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Set<Class<?>> dispatchTypes = flattenHierarchy(event.getClass());
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boolean dispatched = false;
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for (Class<?> eventType : dispatchTypes) {
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handlersByTypeLock.readLock().lock();
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try {
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Set<EventHandler> wrappers = handlersByType.get(eventType);
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if (!wrappers.isEmpty()) {
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dispatched = true;
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for (EventHandler wrapper : wrappers) {
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enqueueEvent(event, wrapper);
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}
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}
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} finally {
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handlersByTypeLock.readLock().unlock();
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}
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}
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if (!dispatched && !(event instanceof DeadEvent)) {
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post(new DeadEvent(this, event));
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}
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dispatchQueuedEvents();
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}
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/**
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* Queue the {@code event} for dispatch during
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* {@link #dispatchQueuedEvents()}. Events are queued in-order of occurrence
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* so they can be dispatched in the same order.
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*/
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void enqueueEvent(Object event, EventHandler handler) {
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eventsToDispatch.get().offer(new EventWithHandler(event, handler));
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}
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/**
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* Drain the queue of events to be dispatched. As the queue is being drained,
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* new events may be posted to the end of the queue.
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*/
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void dispatchQueuedEvents() {
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try {
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Queue<EventWithHandler> events = eventsToDispatch.get();
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EventWithHandler eventWithHandler;
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while ((eventWithHandler = events.poll()) != null) {
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dispatch(eventWithHandler.event, eventWithHandler.handler);
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}
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} finally {
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eventsToDispatch.remove();
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}
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}
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/**
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* Dispatches {@code event} to the handler in {@code wrapper}. This method
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* is an appropriate override point for subclasses that wish to make
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* event delivery asynchronous.
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*
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* @param event event to dispatch.
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* @param wrapper wrapper that will call the handler.
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*/
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void dispatch(Object event, EventHandler wrapper) {
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try {
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wrapper.handleEvent(event);
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} catch (InvocationTargetException e) {
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logger.log(Level.SEVERE,
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"Could not dispatch event: " + event + " to handler " + wrapper, e);
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}
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}
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/**
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* Flattens a class's type hierarchy into a set of Class objects. The set
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* will include all superclasses (transitively), and all interfaces
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* implemented by these superclasses.
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*
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* @param concreteClass class whose type hierarchy will be retrieved.
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* @return {@code clazz}'s complete type hierarchy, flattened and uniqued.
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*/
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@VisibleForTesting
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Set<Class<?>> flattenHierarchy(Class<?> concreteClass) {
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try {
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return flattenHierarchyCache.getUnchecked(concreteClass);
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} catch (UncheckedExecutionException e) {
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throw Throwables.propagate(e.getCause());
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}
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}
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/** simple struct representing an event and it's handler */
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static class EventWithHandler {
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final Object event;
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final EventHandler handler;
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public EventWithHandler(Object event, EventHandler handler) {
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this.event = checkNotNull(event);
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this.handler = checkNotNull(handler);
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}
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}
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}
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@ -1,10 +1,10 @@
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package net.md_5.bungee.api.plugin;
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import com.google.common.base.Preconditions;
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import com.google.common.eventbus.EventBus;
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import com.google.common.eventbus.Subscribe;
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import java.io.File;
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import java.io.InputStream;
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import java.lang.reflect.Method;
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import java.net.URL;
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import java.net.URLClassLoader;
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import java.util.Arrays;
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@ -20,7 +20,8 @@ import lombok.RequiredArgsConstructor;
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import net.md_5.bungee.api.ChatColor;
|
||||
import net.md_5.bungee.api.CommandSender;
|
||||
import net.md_5.bungee.api.ProxyServer;
|
||||
import net.md_5.bungee.api.event.LoginEvent;
|
||||
import net.md_5.bungee.event.EventBus;
|
||||
import net.md_5.bungee.event.EventHandler;
|
||||
import org.yaml.snakeyaml.Yaml;
|
||||
|
||||
/**
|
||||
@ -36,7 +37,8 @@ public class PluginManager
|
||||
private final ProxyServer proxy;
|
||||
/*========================================================================*/
|
||||
private final Yaml yaml = new Yaml();
|
||||
private final EventBus eventBus = new EventBus();
|
||||
@SuppressWarnings("unchecked")
|
||||
private final EventBus eventBus = new EventBus( ProxyServer.getInstance().getLogger(), Subscribe.class, EventHandler.class );
|
||||
private final Map<String, Plugin> plugins = new HashMap<>();
|
||||
private final Map<String, Command> commandMap = new HashMap<>();
|
||||
|
||||
@ -311,6 +313,14 @@ public class PluginManager
|
||||
*/
|
||||
public void registerListener(Plugin plugin, Listener listener)
|
||||
{
|
||||
for ( Method method : listener.getClass().getDeclaredMethods() )
|
||||
{
|
||||
if ( method.isAnnotationPresent( Subscribe.class ) )
|
||||
{
|
||||
proxy.getLogger().log( Level.SEVERE, "Listener {0} has registered using depreceated subscribe annotation! Please advice author to update to @EventHadler", listener );
|
||||
}
|
||||
}
|
||||
|
||||
eventBus.register( listener );
|
||||
}
|
||||
}
|
||||
|
||||
29
event/pom.xml
Normal file
29
event/pom.xml
Normal file
@ -0,0 +1,29 @@
|
||||
|
||||
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
|
||||
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
|
||||
<modelVersion>4.0.0</modelVersion>
|
||||
|
||||
<parent>
|
||||
<groupId>net.md-5</groupId>
|
||||
<artifactId>bungeecord-parent</artifactId>
|
||||
<version>1.5-SNAPSHOT</version>
|
||||
<relativePath>../pom.xml</relativePath>
|
||||
</parent>
|
||||
|
||||
<groupId>net.md-5</groupId>
|
||||
<artifactId>bungeecord-event</artifactId>
|
||||
<version>1.5-SNAPSHOT</version>
|
||||
<packaging>jar</packaging>
|
||||
|
||||
<name>BungeeCord-Event</name>
|
||||
<description>Generic java event dispatching API intended for use with BungeeCord</description>
|
||||
|
||||
<dependencies>
|
||||
<dependency>
|
||||
<groupId>junit</groupId>
|
||||
<artifactId>junit</artifactId>
|
||||
<version>4.11</version>
|
||||
<scope>test</scope>
|
||||
</dependency>
|
||||
</dependencies>
|
||||
</project>
|
||||
163
event/src/main/java/net/md_5/bungee/event/EventBus.java
Normal file
163
event/src/main/java/net/md_5/bungee/event/EventBus.java
Normal file
@ -0,0 +1,163 @@
|
||||
package net.md_5.bungee.event;
|
||||
|
||||
import java.lang.annotation.Annotation;
|
||||
import java.lang.reflect.InvocationTargetException;
|
||||
import java.lang.reflect.Method;
|
||||
import java.text.MessageFormat;
|
||||
import java.util.HashMap;
|
||||
import java.util.HashSet;
|
||||
import java.util.Map;
|
||||
import java.util.Set;
|
||||
import java.util.concurrent.locks.ReadWriteLock;
|
||||
import java.util.concurrent.locks.ReentrantReadWriteLock;
|
||||
import java.util.logging.Level;
|
||||
import java.util.logging.Logger;
|
||||
|
||||
public class EventBus
|
||||
{
|
||||
|
||||
private final Map<Class<?>, Map<Object, Method[]>> eventToHandler = new HashMap<>();
|
||||
private final ReadWriteLock lock = new ReentrantReadWriteLock();
|
||||
private final Logger logger;
|
||||
private final Class<? extends Annotation>[] annotations;
|
||||
|
||||
public EventBus()
|
||||
{
|
||||
this( null, (Class<? extends Annotation>[]) null );
|
||||
}
|
||||
|
||||
public EventBus(Logger logger)
|
||||
{
|
||||
this( logger, (Class<? extends Annotation>[]) null );
|
||||
}
|
||||
|
||||
@SuppressWarnings("unchecked")
|
||||
public EventBus(Class<? extends Annotation>... annotations)
|
||||
{
|
||||
this( null, annotations );
|
||||
}
|
||||
|
||||
@SuppressWarnings("unchecked")
|
||||
public EventBus(Logger logger, Class<? extends Annotation>... annotations)
|
||||
{
|
||||
this.logger = ( logger == null ) ? Logger.getGlobal() : logger;
|
||||
this.annotations = ( annotations == null || annotations.length == 0 ) ? new Class[]
|
||||
{
|
||||
EventHandler.class
|
||||
} : annotations;
|
||||
}
|
||||
|
||||
public void post(Object event)
|
||||
{
|
||||
lock.readLock().lock();
|
||||
try
|
||||
{
|
||||
Map<Object, Method[]> handlers = eventToHandler.get( event.getClass() );
|
||||
if ( handlers != null )
|
||||
{
|
||||
for ( Map.Entry<Object, Method[]> handler : handlers.entrySet() )
|
||||
{
|
||||
for ( Method method : handler.getValue() )
|
||||
{
|
||||
try
|
||||
{
|
||||
method.invoke( handler.getKey(), event );
|
||||
} catch ( IllegalAccessException ex )
|
||||
{
|
||||
throw new Error( "Method became inaccessible: " + event, ex );
|
||||
} catch ( IllegalArgumentException ex )
|
||||
{
|
||||
throw new Error( "Method rejected target/argument: " + event, ex );
|
||||
} catch ( InvocationTargetException ex )
|
||||
{
|
||||
logger.log( Level.WARNING, MessageFormat.format( "Error dispatching event {0} to listener {1}", event, handler.getKey() ), ex.getCause() );
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
} finally
|
||||
{
|
||||
lock.readLock().unlock();
|
||||
}
|
||||
}
|
||||
|
||||
private Map<Class<?>, Set<Method>> findHandlers(Object listener)
|
||||
{
|
||||
Map<Class<?>, Set<Method>> handler = new HashMap<>();
|
||||
for ( Method m : listener.getClass().getDeclaredMethods() )
|
||||
{
|
||||
for ( Class<? extends Annotation> annotation : annotations )
|
||||
{
|
||||
if ( m.isAnnotationPresent( annotation ) )
|
||||
{
|
||||
Class<?>[] params = m.getParameterTypes();
|
||||
if ( params.length != 1 )
|
||||
{
|
||||
logger.log( Level.INFO, "Method {0} in class {1} annotated with {2} does not have single argument", new Object[]
|
||||
{
|
||||
m, listener.getClass(), annotation
|
||||
} );
|
||||
continue;
|
||||
}
|
||||
|
||||
Set<Method> existing = handler.get( params[0] );
|
||||
if ( existing == null )
|
||||
{
|
||||
existing = new HashSet<>();
|
||||
handler.put( params[0], existing );
|
||||
}
|
||||
existing.add( m );
|
||||
break;
|
||||
}
|
||||
}
|
||||
}
|
||||
return handler;
|
||||
}
|
||||
|
||||
public void register(Object listener)
|
||||
{
|
||||
Map<Class<?>, Set<Method>> handler = findHandlers( listener );
|
||||
lock.writeLock().lock();
|
||||
try
|
||||
{
|
||||
for ( Map.Entry<Class<?>, Set<Method>> e : handler.entrySet() )
|
||||
{
|
||||
Map<Object, Method[]> a = eventToHandler.get( e.getKey() );
|
||||
if ( a == null )
|
||||
{
|
||||
a = new HashMap<>();
|
||||
eventToHandler.put( e.getKey(), a );
|
||||
}
|
||||
Method[] baked = new Method[ e.getValue().size() ];
|
||||
a.put( listener, e.getValue().toArray( baked ) );
|
||||
}
|
||||
} finally
|
||||
{
|
||||
lock.writeLock().unlock();
|
||||
}
|
||||
}
|
||||
|
||||
public void unregister(Object listener)
|
||||
{
|
||||
Map<Class<?>, Set<Method>> handler = findHandlers( listener );
|
||||
lock.writeLock().lock();
|
||||
try
|
||||
{
|
||||
for ( Map.Entry<Class<?>, Set<Method>> e : handler.entrySet() )
|
||||
{
|
||||
Map<Object, Method[]> a = eventToHandler.get( e.getKey() );
|
||||
if ( a != null )
|
||||
{
|
||||
a.remove( listener );
|
||||
if ( a.isEmpty() )
|
||||
{
|
||||
eventToHandler.remove( e.getKey() );
|
||||
}
|
||||
}
|
||||
}
|
||||
} finally
|
||||
{
|
||||
lock.writeLock().unlock();
|
||||
}
|
||||
}
|
||||
}
|
||||
13
event/src/main/java/net/md_5/bungee/event/EventHandler.java
Normal file
13
event/src/main/java/net/md_5/bungee/event/EventHandler.java
Normal file
@ -0,0 +1,13 @@
|
||||
package net.md_5.bungee.event;
|
||||
|
||||
|
||||
import java.lang.annotation.ElementType;
|
||||
import java.lang.annotation.Retention;
|
||||
import java.lang.annotation.RetentionPolicy;
|
||||
import java.lang.annotation.Target;
|
||||
|
||||
@Retention(RetentionPolicy.RUNTIME)
|
||||
@Target(ElementType.METHOD)
|
||||
public @interface EventHandler
|
||||
{
|
||||
}
|
||||
@ -1,7 +1,5 @@
|
||||
package net.md_5.bungee.api.plugin;
|
||||
package net.md_5.bungee.event;
|
||||
|
||||
import com.google.common.eventbus.EventBus;
|
||||
import com.google.common.eventbus.Subscribe;
|
||||
import java.util.concurrent.CountDownLatch;
|
||||
import org.junit.Assert;
|
||||
import org.junit.Test;
|
||||
@ -10,33 +8,35 @@ public class EventBusTest
|
||||
{
|
||||
|
||||
private final EventBus bus = new EventBus();
|
||||
private final CountDownLatch latch = new CountDownLatch( 1 );
|
||||
private final CountDownLatch latch = new CountDownLatch( 2 );
|
||||
|
||||
@Test
|
||||
public void testNestedEvents()
|
||||
{
|
||||
bus.register( this );
|
||||
bus.post( new FirstEvent() );
|
||||
}
|
||||
|
||||
@Subscribe
|
||||
public void firstListener(FirstEvent event)
|
||||
{
|
||||
bus.post( new SecondEvent() );
|
||||
Assert.assertEquals( latch.getCount(), 0 );
|
||||
}
|
||||
|
||||
@Subscribe
|
||||
@EventHandler
|
||||
public void firstListener(FirstEvent event)
|
||||
{
|
||||
bus.post( new SecondEvent() );
|
||||
Assert.assertEquals( latch.getCount(), 1 );
|
||||
latch.countDown();
|
||||
}
|
||||
|
||||
@EventHandler
|
||||
public void secondListener(SecondEvent event)
|
||||
{
|
||||
latch.countDown();
|
||||
}
|
||||
|
||||
public static class FirstEvent extends Event
|
||||
public static class FirstEvent
|
||||
{
|
||||
}
|
||||
|
||||
public static class SecondEvent extends Event
|
||||
public static class SecondEvent
|
||||
{
|
||||
}
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user