/*
* 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.connectors.kafka.testutils;
import org.apache.flink.api.java.tuple.Tuple2;
import org.apache.flink.streaming.connectors.kafka.partitioner.FlinkKafkaPartitioner;
/**
* Special partitioner that uses the first field of a 2-tuple as the partition,
* and that expects a specific number of partitions.
*/
public class Tuple2FlinkPartitioner extends FlinkKafkaPartitioner<Tuple2<Integer, Integer>> {
private static final long serialVersionUID = -3589898230375281549L;
private final int expectedPartitions;
public Tuple2FlinkPartitioner(int expectedPartitions) {
this.expectedPartitions = expectedPartitions;
}
@Override
public int partition(Tuple2<Integer, Integer> next, byte[] key, byte[] value, String targetTopic, int[] partitions) {
if (partitions.length != expectedPartitions) {
throw new IllegalArgumentException("Expected " + expectedPartitions + " partitions");
}
return next.f0;
}
}