kafka StreamTableJoinNode 源码
kafka StreamTableJoinNode 代码
文件路径：/streams/src/main/java/org/apache/kafka/streams/kstream/internals/graph/StreamTableJoinNode.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.api.ProcessorSupplier;
import org.apache.kafka.streams.processor.internals.InternalTopologyBuilder;
import java.util.Arrays;
/**
* Represents a join between a KStream and a KTable or GlobalKTable
*/
public class StreamTableJoinNode<K, V> extends GraphNode {
private final String[] storeNames;
private final ProcessorParameters<K, V, ?, ?> processorParameters;
private final String otherJoinSideNodeName;
public StreamTableJoinNode(final String nodeName,
final ProcessorParameters<K, V, ?, ?> processorParameters,
final String[] storeNames,
final String otherJoinSideNodeName) {
super(nodeName);
// in the case of Stream-Table join the state stores associated with the KTable
this.storeNames = storeNames;
this.processorParameters = processorParameters;
this.otherJoinSideNodeName = otherJoinSideNodeName;
}
@Override
public String toString() {
return "StreamTableJoinNode{" +
"storeNames=" + Arrays.toString(storeNames) +
", processorParameters=" + processorParameters +
", otherJoinSideNodeName='" + otherJoinSideNodeName + '\'' +
"} " + super.toString();
}
@Override
public void writeToTopology(final InternalTopologyBuilder topologyBuilder) {
final String processorName = processorParameters.processorName();
final ProcessorSupplier<K, V, ?, ?> processorSupplier = processorParameters.processorSupplier();
// Stream - Table join (Global or KTable)
topologyBuilder.addProcessor(processorName, processorSupplier, parentNodeNames());
// Steam - KTable join only
if (otherJoinSideNodeName != null) {
topologyBuilder.connectProcessorAndStateStores(processorName, storeNames);
}
}
}
相关信息
相关文章
kafka BaseJoinProcessorNode 源码
kafka GroupedTableOperationRepartitionNode 源码
0
赞
热门推荐
-
2、 - 优质文章
-
3、 gate.io
-
7、 golang
-
9、 openharmony
-
10、 Vue中input框自动聚焦