    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
    017    package com.google.common.eventbus;
    018
    019    import com.google.common.annotations.Beta;
    020    import java.lang.annotation.ElementType;
    021    import java.lang.annotation.Retention;
    022    import java.lang.annotation.RetentionPolicy;
    023    import java.lang.annotation.Target;
    024
    025    /**
    026     * Marks an event handling method as being thread-safe.  This annotation
    027     * indicates that EventBus may invoke the event handler simultaneously from
    028     * multiple threads.
    029     *
    030     * <p>This does not mark the method as an event handler, and so should be used
    031     * in combination with {@link Subscribe}.
    032     *
    033     * @author Cliff Biffle
    034     * @since 10.0
    035     */
    036    @Retention(RetentionPolicy.RUNTIME)
    037    @Target(ElementType.METHOD)
    038    @Beta
    039    public @interface AllowConcurrentEvents {
    040    }