Java tutorial
// Copyright (c) 2017 Pivotal Software, Inc. All rights reserved. // // This software, the RabbitMQ Java client library, is triple-licensed under the // Mozilla Public License 1.1 ("MPL"), the GNU General Public License version 2 // ("GPL") and the Apache License version 2 ("ASL"). For the MPL, please see // LICENSE-MPL-RabbitMQ. For the GPL, please see LICENSE-GPL2. For the ASL, // please see LICENSE-APACHE2. // // This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, // either express or implied. See the LICENSE file for specific language governing // rights and limitations of this software. // // If you have any questions regarding licensing, please contact us at // info@rabbitmq.com. package com.rabbitmq.client; /** * Implement this interface in order to be notified of failed * deliveries when basicPublish is called with "mandatory" or * "immediate" flags set. * Prefer this interface over {@link ReturnListener} for * a simpler, lambda-oriented syntax. * @see Channel#basicPublish * @see ReturnListener * @see Return */ @FunctionalInterface public interface ReturnCallback { void handle(Return returnMessage); }