org.apache.hudi.sink.partitioner.BucketIndexPartitioner Maven / Gradle / Ivy
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* Licensed to the Apache Software Foundation (ASF) under one
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* 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,
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*/
package org.apache.hudi.sink.partitioner;
import org.apache.hudi.common.model.HoodieKey;
import org.apache.hudi.common.util.Functions;
import org.apache.hudi.index.bucket.BucketIdentifier;
import org.apache.hudi.sink.utils.BucketIndexUtil;
import org.apache.flink.api.common.functions.Partitioner;
/**
* Bucket index input partitioner.
* The fields to hash can be a subset of the primary key fields.
*
* @param The type of obj to hash
*/
public class BucketIndexPartitioner implements Partitioner {
private final int bucketNum;
private final String indexKeyFields;
private Functions.Function2 partitionIndexFunc;
public BucketIndexPartitioner(int bucketNum, String indexKeyFields) {
this.bucketNum = bucketNum;
this.indexKeyFields = indexKeyFields;
}
@Override
public int partition(HoodieKey key, int numPartitions) {
if (this.partitionIndexFunc == null) {
this.partitionIndexFunc = BucketIndexUtil.getPartitionIndexFunc(bucketNum, numPartitions);
}
int curBucket = BucketIdentifier.getBucketId(key, indexKeyFields, bucketNum);
return this.partitionIndexFunc.apply(key.getPartitionPath(), curBucket);
}
}