kafka ProcessorGraphNode 源码
kafka ProcessorGraphNode 代码
文件路径：/streams/src/main/java/org/apache/kafka/streams/kstream/internals/graph/ProcessorGraphNode.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.streams.processor.internals.InternalTopologyBuilder;
/**
* Used to represent any type of stateless operation:
*
* map, mapValues, flatMap, flatMapValues, filter, filterNot, branch
*/
public class ProcessorGraphNode<K, V> extends GraphNode {
private final ProcessorParameters<K, V, ?, ?> processorParameters;
public ProcessorGraphNode(final ProcessorParameters<K, V, ?, ?> processorParameters) {
super(processorParameters.processorName());
this.processorParameters = processorParameters;
}
public ProcessorGraphNode(final String nodeName,
final ProcessorParameters<K, V, ?, ?> processorParameters) {
super(nodeName);
this.processorParameters = processorParameters;
}
public ProcessorParameters<K, V, ?, ?> processorParameters() {
return processorParameters;
}
@Override
public String toString() {
return "ProcessorNode{" +
"processorParameters=" + processorParameters +
"} " + super.toString();
}
@Override
public void writeToTopology(final InternalTopologyBuilder topologyBuilder) {
processorParameters.addProcessorTo(topologyBuilder, parentNodeNames());
}
}
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