1 /*
2 * *************************************************************************************************************************************************************
3 *
4 * TheseFoolishThings: Miscellaneous utilities
5 * http://tidalwave.it/projects/thesefoolishthings
6 *
7 * Copyright (C) 2009 - 2026 by Tidalwave s.a.s. (http://tidalwave.it)
8 *
9 * *************************************************************************************************************************************************************
10 *
11 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License.
12 * You may obtain a copy of the License at
13 *
14 * http://www.apache.org/licenses/LICENSE-2.0
15 *
16 * 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
17 * CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.
18 *
19 * *************************************************************************************************************************************************************
20 *
21 * git clone https://bitbucket.org/tidalwave/thesefoolishthings-src
22 * git clone https://github.com/tidalwave-it/thesefoolishthings-src
23 *
24 * *************************************************************************************************************************************************************
25 */
26 package it.tidalwave.messagebus.impl.spring;
27
28 import jakarta.annotation.Nonnull;
29 import org.springframework.beans.factory.BeanFactory;
30 import it.tidalwave.messagebus.MessageBus;
31 import it.tidalwave.messagebus.MessageBusHelper;
32 import it.tidalwave.messagebus.annotation.SimpleMessageSubscriber;
33
34 /***************************************************************************************************************************************************************
35 * The implementation of the semantics of {@link SimpleMessageSubscriber} in a Spring environment, used by {@code SpringSimpleMessageSubscriberAspect}: it
36 * subscribes and unsubscribes the listener methods of a bean to the message bus whose name is specified by {@link SimpleMessageSubscriber#source()}.
37 * @author Fabrizio Giudici
38 **************************************************************************************************************************************************************/
39 public class SpringSimpleMessageSubscriberSupport
40 {
41 /** The helper that subscribes and unsubscribes the listener methods. */
42 private final MessageBusHelper busHelper;
43
44 /***********************************************************************************************************************************************************
45 * Creates a new instance.
46 * @param beanFactory the {@link BeanFactory} that provides the message bus
47 * @param bean the bean, annotated with {@link SimpleMessageSubscriber}
48 **********************************************************************************************************************************************************/
49 public SpringSimpleMessageSubscriberSupport (@Nonnull final BeanFactory beanFactory, @Nonnull final Object bean)
50 {
51 final var source = bean.getClass().getAnnotation(SimpleMessageSubscriber.class).source();
52 final var messageBus = beanFactory.getBean(source, MessageBus.class);
53 busHelper = new MessageBusHelper(bean, new MessageBusAdapterFactory(messageBus));
54 }
55
56 /***********************************************************************************************************************************************************
57 * Subscribes all the listener methods of the bean.
58 **********************************************************************************************************************************************************/
59 public void subscribeAll()
60 {
61 busHelper.subscribeAll();
62 }
63
64 /***********************************************************************************************************************************************************
65 * Unsubscribes all the listener methods of the bean.
66 **********************************************************************************************************************************************************/
67 public void unsubscribeAll()
68 {
69 busHelper.unsubscribeAll();
70 }
71 }