1 /*
2 * Copyright (C) 2007 The Guava Authors
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 package com.google.common.eventbus;
18
19 import com.google.common.annotations.Beta;
20
21 import java.lang.annotation.ElementType;
22 import java.lang.annotation.Retention;
23 import java.lang.annotation.RetentionPolicy;
24 import java.lang.annotation.Target;
25
26 /**
27 * Marks an event subscriber method as being thread-safe. This annotation
28 * indicates that EventBus may invoke the event subscriber simultaneously from
29 * multiple threads.
30 *
31 * <p>This does not mark the method, and so should be used in combination with
32 * {@link Subscribe}.
33 *
34 * @author Cliff Biffle
35 * @since 10.0
36 */
37 @Retention(RetentionPolicy.RUNTIME)
38 @Target(ElementType.METHOD)
39 @Beta
40 public @interface AllowConcurrentEvents {
41 }