spring-kafka CompositeBatchInterceptor 源码
spring-kafka CompositeBatchInterceptor 代码
文件路径：/spring-kafka/src/main/java/org/springframework/kafka/listener/CompositeBatchInterceptor.java
/*
* Copyright 2019-2021 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.listener;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import org.apache.kafka.clients.consumer.Consumer;
import org.apache.kafka.clients.consumer.ConsumerRecords;
import org.springframework.util.Assert;
/**
* A {@link BatchInterceptor} that delegates to one or more {@link BatchInterceptor}s in
* order.
*
* @param <K> the key type.
* @param <V> the value type.
*
* @author Gary Russell
* @since 2.7
*
*/
public class CompositeBatchInterceptor<K, V> implements BatchInterceptor<K, V> {
private final Collection<BatchInterceptor<K, V>> delegates = new ArrayList<>();
/**
* Construct an instance with the provided delegates.
* @param delegates the delegates.
*/
@SafeVarargs
@SuppressWarnings("varargs")
public CompositeBatchInterceptor(BatchInterceptor<K, V>... delegates) {
Assert.notNull(delegates, "'delegates' cannot be null");
Assert.noNullElements(delegates, "'delegates' cannot have null entries");
this.delegates.addAll(Arrays.asList(delegates));
}
@Override
public ConsumerRecords<K, V> intercept(ConsumerRecords<K, V> records, Consumer<K, V> consumer) {
ConsumerRecords<K, V> recordsToIntercept = records;
for (BatchInterceptor<K, V> delegate : this.delegates) {
recordsToIntercept = delegate.intercept(recordsToIntercept, consumer);
if (recordsToIntercept == null) {
break;
}
}
return recordsToIntercept;
}
@Override
public void success(ConsumerRecords<K, V> records, Consumer<K, V> consumer) {
this.delegates.forEach(del -> del.success(records, consumer));
}
@Override
public void failure(ConsumerRecords<K, V> records, Exception exception, Consumer<K, V> consumer) {
this.delegates.forEach(del -> del.failure(records, exception, consumer));
}
@Override
public void setupThreadState(Consumer<?, ?> consumer) {
this.delegates.forEach(del -> del.setupThreadState(consumer));
}
@Override
public void clearThreadState(Consumer<?, ?> consumer) {
this.delegates.forEach(del -> del.clearThreadState(consumer));
}
}
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