/*
* Copyright 2002-2016 the original author or 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 org.springframework.messaging.handler.annotation;
import java.lang.annotation.Documented;
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.springframework.messaging.Message;
/**
* Annotation that indicates a method's return value should be converted to
* a {@link Message} if necessary and sent to the specified destination.
*
* <p>In a typical request/reply scenario, the incoming {@link Message} may
* convey the destination to use for the reply. In that case, that destination
* should take precedence.
*
* <p>The annotation may also be placed at class-level if the provider supports
* it to indicate that all related methods should use this destination if none
* is specified otherwise.
*
* @author Rossen Stoyanchev
* @author Stephane Nicoll
* @since 4.0
*/
@Target({ElementType.METHOD, ElementType.TYPE})
@Retention(RetentionPolicy.RUNTIME)
@Documented
public @interface SendTo {
/**
* The destination for a message created from the return value of a method.
*/
String[] value() default {};
}