org.apache.flink.streaming.runtime.partitioner.BroadcastPartitioner Maven / Gradle / Ivy
/*
* 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.flink.streaming.runtime.partitioner;
import org.apache.flink.annotation.Internal;
import org.apache.flink.runtime.plugable.SerializationDelegate;
import org.apache.flink.streaming.runtime.streamrecord.StreamRecord;
/**
* Partitioner that selects all the output channels.
*
* @param Type of the elements in the Stream being broadcast
*/
@Internal
public class BroadcastPartitioner extends StreamPartitioner {
private static final long serialVersionUID = 1L;
int[] returnArray;
boolean set;
int setNumber;
@Override
public int[] selectChannels(SerializationDelegate> record,
int numberOfOutputChannels) {
if (set && setNumber == numberOfOutputChannels) {
return returnArray;
} else {
this.returnArray = new int[numberOfOutputChannels];
for (int i = 0; i < numberOfOutputChannels; i++) {
returnArray[i] = i;
}
set = true;
setNumber = numberOfOutputChannels;
return returnArray;
}
}
@Override
public StreamPartitioner copy() {
return this;
}
@Override
public String toString() {
return "BROADCAST";
}
}