dev.responsive.kafka.internal.db.partitioning.TablePartitioner Maven / Gradle / Ivy
/*
* Copyright 2023 Responsive Computing, Inc.
*
* Licensed 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 dev.responsive.kafka.internal.db.partitioning;
public interface TablePartitioner {
/**
* @param kafkaPartition the original partition in kafka
* @param key the data key
* @return the remote table partition
*/
P tablePartition(final int kafkaPartition, final K key);
/**
* @param kafkaPartition the original partition in kafka
* @return the remote table partition for metadata rows
*/
P metadataTablePartition(final int kafkaPartition);
static TablePartitioner defaultPartitioner() {
return new DefaultPartitioner<>();
}
/**
* A default, no-op partitioner that is one-to-one with the Kafka partition
* and has only a single dimension to the partitioning key
*
* @param the record key type
*/
class DefaultPartitioner implements TablePartitioner {
@Override
public Integer tablePartition(final int kafkaPartition, final K key) {
return kafkaPartition;
}
@Override
public Integer metadataTablePartition(final int kafkaPartition) {
return kafkaPartition;
}
}
}