kafka StreamSinkNode 源码

kafka StreamSinkNode 代码

文件路径：/streams/src/main/java/org/apache/kafka/streams/kstream/internals/graph/StreamSinkNode.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements. See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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 org.apache.kafka.streams.kstream.internals.graph;

import org.apache.kafka.common.serialization.Serializer;
import org.apache.kafka.streams.kstream.internals.ProducedInternal;
import org.apache.kafka.streams.kstream.internals.WindowedSerializer;
import org.apache.kafka.streams.kstream.internals.WindowedStreamPartitioner;
import org.apache.kafka.streams.processor.StreamPartitioner;
import org.apache.kafka.streams.processor.TopicNameExtractor;
import org.apache.kafka.streams.processor.internals.InternalTopologyBuilder;
import org.apache.kafka.streams.processor.internals.StaticTopicNameExtractor;

public class StreamSinkNode<K, V> extends GraphNode {

    private final TopicNameExtractor<K, V> topicNameExtractor;
    private final ProducedInternal<K, V> producedInternal;

    public StreamSinkNode(final String nodeName,
                          final TopicNameExtractor<K, V> topicNameExtractor,
                          final ProducedInternal<K, V> producedInternal) {

        super(nodeName);

        this.topicNameExtractor = topicNameExtractor;
        this.producedInternal = producedInternal;
    }


    @Override
    public String toString() {
        return "StreamSinkNode{" +
               "topicNameExtractor=" + topicNameExtractor +
               ", producedInternal=" + producedInternal +
               "} " + super.toString();
    }

    @Override
    @SuppressWarnings("unchecked")
    public void writeToTopology(final InternalTopologyBuilder topologyBuilder) {
        final Serializer<K> keySerializer = producedInternal.keySerde() == null ? null : producedInternal.keySerde().serializer();
        final Serializer<V> valSerializer = producedInternal.valueSerde() == null ? null : producedInternal.valueSerde().serializer();
        final String[] parentNames = parentNodeNames();

        final StreamPartitioner<? super K, ? super V> partitioner;
        if (producedInternal.streamPartitioner() == null && keySerializer instanceof WindowedSerializer) {
            partitioner = (StreamPartitioner<K, V>) new WindowedStreamPartitioner<K, V>((WindowedSerializer<K>) keySerializer);
        } else {
            partitioner = producedInternal.streamPartitioner();
        }

        if (topicNameExtractor instanceof StaticTopicNameExtractor) {
            final String topicName = ((StaticTopicNameExtractor<K, V>) topicNameExtractor).topicName;
            topologyBuilder.addSink(nodeName(), topicName, keySerializer, valSerializer, partitioner, parentNames);
        } else {
            topologyBuilder.addSink(nodeName(), topicNameExtractor, keySerializer, valSerializer, partitioner, parentNames);
        }
    }

}

相关信息

kafka 源码目录

相关文章

kafka BaseJoinProcessorNode 源码

kafka BaseRepartitionNode 源码

kafka GlobalStoreNode 源码

kafka GraphGraceSearchUtil 源码

kafka GraphNode 源码

kafka GroupedTableOperationRepartitionNode 源码

kafka KTableKTableJoinNode 源码

kafka OptimizableRepartitionNode 源码

kafka ProcessorGraphNode 源码

kafka ProcessorParameters 源码