/*
* 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 com.google.common.annotations.Beta;
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 handler, as used by
* {@link AnnotatedHandlerFinder} and {@link EventBus}.
*
* <p>The type of event will be indicated by the method's first (and only)
* parameter. 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}.
*
* <p>Unless also annotated with @{@link AllowConcurrentEvents}, event handler
* 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)
@Beta
public @interface Subscribe {
}
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