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/*
* 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;
import org.apache.kafka.common.serialization.Serde;
import org.apache.kafka.streams.kstream.internals.WindowedSerializer;
import org.apache.kafka.streams.kstream.internals.WindowedStreamPartitioner;
import org.apache.kafka.streams.processor.StreamPartitioner;
import org.apache.kafka.streams.processor.internals.DefaultStreamPartitioner;
/**
* This class is used to provide the optional parameters for internal repartition topics.
*
* @param key type
* @param value type
* @see KStream#repartition()
* @see KStream#repartition(Repartitioned)
*/
public class Repartitioned implements NamedOperation> {
protected final String name;
protected final Serde keySerde;
protected final Serde valueSerde;
protected final Integer numberOfPartitions;
protected final StreamPartitioner partitioner;
private Repartitioned(final String name,
final Serde keySerde,
final Serde valueSerde,
final Integer numberOfPartitions,
final StreamPartitioner partitioner) {
this.name = name;
this.keySerde = keySerde;
this.valueSerde = valueSerde;
this.numberOfPartitions = numberOfPartitions;
this.partitioner = partitioner;
}
protected Repartitioned(final Repartitioned repartitioned) {
this(
repartitioned.name,
repartitioned.keySerde,
repartitioned.valueSerde,
repartitioned.numberOfPartitions,
repartitioned.partitioner
);
}
/**
* Create a {@code Repartitioned} instance with the provided name used as part of the repartition topic.
*
* @param name the name used as a processor named and part of the repartition topic name.
* @param key type
* @param value type
* @return A new {@code Repartitioned} instance configured with processor name and repartition topic name
* @see KStream#repartition(Repartitioned)
*/
public static Repartitioned as(final String name) {
return new Repartitioned<>(name, null, null, null, null);
}
/**
* Create a {@code Repartitioned} instance with provided key serde and value serde.
*
* @param keySerde Serde to use for serializing the key
* @param valueSerde Serde to use for serializing the value
* @param key type
* @param value type
* @return A new {@code Repartitioned} instance configured with key serde and value serde
* @see KStream#repartition(Repartitioned)
*/
public static Repartitioned with(final Serde keySerde,
final Serde valueSerde) {
return new Repartitioned<>(null, keySerde, valueSerde, null, null);
}
/**
* Create a {@code Repartitioned} instance with provided partitioner.
*
* @param partitioner the function used to determine how records are distributed among partitions of the topic,
* if not specified and the key serde provides a {@link WindowedSerializer} for the key
* {@link WindowedStreamPartitioner} will be used—otherwise {@link DefaultStreamPartitioner} will be used
* @param key type
* @param value type
* @return A new {@code Repartitioned} instance configured with partitioner
* @see KStream#repartition(Repartitioned)
*/
public static Repartitioned streamPartitioner(final StreamPartitioner partitioner) {
return new Repartitioned<>(null, null, null, null, partitioner);
}
/**
* Create a {@code Repartitioned} instance with provided number of partitions for repartition topic.
*
* @param numberOfPartitions number of partitions used when creating repartition topic
* @param key type
* @param value type
* @return A new {@code Repartitioned} instance configured number of partitions
* @see KStream#repartition(Repartitioned)
*/
public static Repartitioned numberOfPartitions(final int numberOfPartitions) {
return new Repartitioned<>(null, null, null, numberOfPartitions, null);
}
/**
* Create a new instance of {@code Repartitioned} with the provided name used as part of repartition topic and processor name.
*
* @param name the name used for the processor name and as part of the repartition topic
* @return a new {@code Repartitioned} instance configured with the name
*/
@Override
public Repartitioned withName(final String name) {
return new Repartitioned<>(name, keySerde, valueSerde, numberOfPartitions, partitioner);
}
/**
* Create a new instance of {@code Repartitioned} with the provided number of partitions for repartition topic.
*
* @param numberOfPartitions the name used for the processor name and as part of the repartition topic name
* @return a new {@code Repartitioned} instance configured with the number of partitions
*/
public Repartitioned withNumberOfPartitions(final int numberOfPartitions) {
return new Repartitioned<>(name, keySerde, valueSerde, numberOfPartitions, partitioner);
}
/**
* Create a new instance of {@code Repartitioned} with the provided key serde.
*
* @param keySerde Serde to use for serializing the key
* @return a new {@code Repartitioned} instance configured with the key serde
*/
public Repartitioned withKeySerde(final Serde keySerde) {
return new Repartitioned<>(name, keySerde, valueSerde, numberOfPartitions, partitioner);
}
/**
* Create a new instance of {@code Repartitioned} with the provided value serde.
*
* @param valueSerde Serde to use for serializing the value
* @return a new {@code Repartitioned} instance configured with the value serde
*/
public Repartitioned withValueSerde(final Serde valueSerde) {
return new Repartitioned<>(name, keySerde, valueSerde, numberOfPartitions, partitioner);
}
/**
* Create a new instance of {@code Repartitioned} with the provided partitioner.
*
* @param partitioner the function used to determine how records are distributed among partitions of the topic,
* if not specified and the key serde provides a {@link WindowedSerializer} for the key
* {@link WindowedStreamPartitioner} will be used—otherwise {@link DefaultStreamPartitioner} wil be used
* @return a new {@code Repartitioned} instance configured with provided partitioner
*/
public Repartitioned withStreamPartitioner(final StreamPartitioner partitioner) {
return new Repartitioned<>(name, keySerde, valueSerde, numberOfPartitions, partitioner);
}
}
