001/*
002 * Copyright (C) 2007 The Guava Authors
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 * http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 */
016
017package com.google.common.eventbus;
018
019import com.google.common.annotations.Beta;
020
021import java.lang.annotation.ElementType;
022import java.lang.annotation.Retention;
023import java.lang.annotation.RetentionPolicy;
024import java.lang.annotation.Target;
025
026/**
027 * Marks an event handling method as being thread-safe.  This annotation
028 * indicates that EventBus may invoke the event handler simultaneously from
029 * multiple threads.
030 *
031 * <p>This does not mark the method as an event handler, and so should be used
032 * in combination with {@link Subscribe}.
033 *
034 * @author Cliff Biffle
035 * @since 10.0
036 */
037@Retention(RetentionPolicy.RUNTIME)
038@Target(ElementType.METHOD)
039@Beta
040public @interface AllowConcurrentEvents {
041}