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A set of classes and interfaces that help integrate modules
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/*
* Copyright (C) 2023 Dynamia Soluciones IT S.A.S - NIT 900302344-1
* Colombia / South America
*
* 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 tools.dynamia.integration.ms;
import tools.dynamia.commons.BeanUtils;
import tools.dynamia.integration.Containers;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
@SuppressWarnings("rawtypes")
public class MessageChannels {
/**
* Lookup listeners.
*
* @param channelName the channel uid
* @return the list
*/
public static List lookupListeners(String channelName, String topic) {
List result = new ArrayList<>();
Collection listeners = Containers.get().findObjects(MessageListener.class);
if (listeners != null) {
for (MessageListener messageListener : listeners) {
MessageChannelExchange exchange = getMessageChannelExchange(messageListener);
if (exchange != null) {
if ((channelMatch(channelName, exchange) && topicMatch(topic, exchange))
|| (exchange.channel().isEmpty() && topicMatch(topic, exchange))) {
result.add(messageListener);
}
} else {
result.add(messageListener);
}
}
}
result.sort(new MessageChannelExchangeComparator());
return result;
}
public static MessageChannelExchange getMessageChannelExchange(MessageListener messageListener) {
MessageChannelExchange exchange = null;
if (BeanUtils.isAnnotated(MessageChannelExchange.class, messageListener.getClass())) {
exchange = messageListener.getClass().getAnnotation(MessageChannelExchange.class);
}
return exchange;
}
private static boolean channelMatch(String channelName, MessageChannelExchange exchange) {
return channelName.equals(exchange.channel());
}
private static boolean topicMatch(String messageTopic, MessageChannelExchange exchange) {
boolean match = false;
for (String topic : exchange.topic()) {
if (messageTopic.equals(topic) || topic.equals("#")) {
match = true;
} else {
Pattern pattern = Pattern.compile(topic);
Matcher matcher = pattern.matcher(messageTopic);
match = matcher.matches();
}
if (match) {
break;
}
}
return match;
}
private MessageChannels() {
}
}
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