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/*
 * Copyright (C) 2007 The Guava Authors
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
 * in compliance with the License. You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software distributed under the License
 * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
 * or implied. See the License for the specific language governing permissions and limitations under
 * the License.
 */

package com.google.common.eventbus;

import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;

/**
 * Marks a method as an event subscriber.
 *
 * 

The type of event will be indicated by the method's first (and only) parameter, which cannot * be primitive. If this annotation is applied to methods with zero parameters, or more than one * parameter, the object containing the method will not be able to register for event delivery from * the {@link EventBus}. * *

Unless also annotated with @{@link AllowConcurrentEvents}, event subscriber methods will be * invoked serially by each event bus that they are registered with. * * @author Cliff Biffle * @since 10.0 */ @Retention(RetentionPolicy.RUNTIME) @Target(ElementType.METHOD) @ElementTypesAreNonnullByDefault public @interface Subscribe {}





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