spring-kafka DefaultDestinationTopicProcessor 源码
spring-kafka DefaultDestinationTopicProcessor 代码
文件路径：/spring-kafka/src/main/java/org/springframework/kafka/retrytopic/DefaultDestinationTopicProcessor.java
/*
* Copyright 2017-2021 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
*
* https://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.kafka.retrytopic;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import java.util.function.Consumer;
import java.util.stream.Collectors;
/**
*
* Default implementation of the {@link DestinationTopicProcessor} interface.
*
* @author Tomaz Fernandes
* @since 2.7
*
*/
public class DefaultDestinationTopicProcessor implements DestinationTopicProcessor {
private final DestinationTopicResolver destinationTopicResolver;
public DefaultDestinationTopicProcessor(DestinationTopicResolver destinationTopicResolver) {
this.destinationTopicResolver = destinationTopicResolver;
}
@Override
public void processDestinationTopicProperties(Consumer<DestinationTopic.Properties> destinationPropertiesProcessor,
Context context) {
context
.properties
.stream()
.forEach(destinationPropertiesProcessor);
}
@Override
public void registerDestinationTopic(String mainTopicName, String destinationTopicName,
DestinationTopic.Properties destinationTopicProperties, Context context) {
List<DestinationTopic> topicDestinations = context.destinationsByTopicMap
.computeIfAbsent(mainTopicName, newTopic -> new ArrayList<>());
topicDestinations.add(new DestinationTopic(destinationTopicName, destinationTopicProperties));
}
@Override
public void processRegisteredDestinations(Consumer<Collection<String>> topicsCallback, Context context) {
context
.destinationsByTopicMap
.values()
.forEach(topicDestinations -> this.destinationTopicResolver.addDestinationTopics(topicDestinations));
topicsCallback.accept(getAllTopicsNamesForThis(context));
}
private List<String> getAllTopicsNamesForThis(Context context) {
return context.destinationsByTopicMap
.values()
.stream()
.flatMap(Collection::stream)
.map(DestinationTopic::getDestinationName)
.collect(Collectors.toList());
}
}
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