org.apache.kafka.streams.kstream.WindowedSerdes Maven / Gradle / Ivy
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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.Deserializer;
import org.apache.kafka.common.serialization.Serde;
import org.apache.kafka.common.serialization.Serdes;
import org.apache.kafka.common.serialization.Serializer;
public class WindowedSerdes {
static public class TimeWindowedSerde extends Serdes.WrapperSerde> {
// Default constructor needed for reflection object creation
public TimeWindowedSerde() {
super(new TimeWindowedSerializer<>(), new TimeWindowedDeserializer<>());
}
@Deprecated
public TimeWindowedSerde(final Serde inner) {
super(new TimeWindowedSerializer<>(inner.serializer()), new TimeWindowedDeserializer<>(inner.deserializer()));
}
// This constructor can be used for serialize/deserialize a windowed topic
public TimeWindowedSerde(final Serde inner, final long windowSize) {
super(new TimeWindowedSerializer<>(inner.serializer()), new TimeWindowedDeserializer<>(inner.deserializer(), windowSize));
}
// Helper method for users to specify whether the input topic is a changelog topic for deserializing the key properly.
public TimeWindowedSerde forChangelog(final boolean isChangelogTopic) {
final TimeWindowedDeserializer deserializer = (TimeWindowedDeserializer) this.deserializer();
deserializer.setIsChangelogTopic(isChangelogTopic);
return this;
}
}
static public class SessionWindowedSerde extends Serdes.WrapperSerde> {
// Default constructor needed for reflection object creation
public SessionWindowedSerde() {
super(new SessionWindowedSerializer<>(), new SessionWindowedDeserializer<>());
}
public SessionWindowedSerde(final Serde inner) {
super(new SessionWindowedSerializer<>(inner.serializer()), new SessionWindowedDeserializer<>(inner.deserializer()));
}
}
/**
* Construct a {@code TimeWindowedSerde} object for the specified inner class type.
*/
@Deprecated
static public Serde> timeWindowedSerdeFrom(final Class type) {
return new TimeWindowedSerde<>(Serdes.serdeFrom(type));
}
/**
* Construct a {@code TimeWindowedSerde} object to deserialize changelog topic
* for the specified inner class type and window size.
*/
static public Serde> timeWindowedSerdeFrom(final Class type, final long windowSize) {
return new TimeWindowedSerde<>(Serdes.serdeFrom(type), windowSize);
}
/**
* Construct a {@code SessionWindowedSerde} object for the specified inner class type.
*/
static public Serde> sessionWindowedSerdeFrom(final Class type) {
return new SessionWindowedSerde<>(Serdes.serdeFrom(type));
}
static void verifyInnerSerializerNotNull(final Serializer inner,
final Serializer wrapper) {
if (inner == null) {
throw new NullPointerException("Inner serializer is `null`. " +
"User code must use constructor `" + wrapper.getClass().getSimpleName() + "(final Serializer inner)` " +
"instead of the no-arg constructor.");
}
}
static void verifyInnerDeserializerNotNull(final Deserializer inner,
final Deserializer wrapper) {
if (inner == null) {
throw new NullPointerException("Inner deserializer is `null`. " +
"User code must use constructor `" + wrapper.getClass().getSimpleName() + "(final Deserializer inner)` " +
"instead of the no-arg constructor.");
}
}
}