flink-connectors/flink-connector-kafka/src/test/java/org/apache/flink/streaming/connectors/kafka/FlinkKafkaProducerStateSerializerTest.java

/*
 * 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;

import org.apache.flink.api.common.typeutils.SerializerTestBase;
import org.apache.flink.api.common.typeutils.TypeSerializer;
import org.apache.flink.streaming.api.functions.sink.TwoPhaseCommitSinkFunction;
import org.apache.flink.streaming.api.functions.sink.TwoPhaseCommitSinkFunction.TransactionHolder;

import java.util.Collections;
import java.util.Optional;

/**
 * A test for the {@link TypeSerializer TypeSerializers} used for the Kafka producer state.
 */
public class FlinkKafkaProducerStateSerializerTest
	extends SerializerTestBase<
		TwoPhaseCommitSinkFunction.State<
			FlinkKafkaProducer.KafkaTransactionState,
			FlinkKafkaProducer.KafkaTransactionContext>> {

	@Override
	protected TypeSerializer<
		TwoPhaseCommitSinkFunction.State<
			FlinkKafkaProducer.KafkaTransactionState,
			FlinkKafkaProducer.KafkaTransactionContext>> createSerializer() {
		return new TwoPhaseCommitSinkFunction.StateSerializer<>(
			new FlinkKafkaProducer.TransactionStateSerializer(),
			new FlinkKafkaProducer.ContextStateSerializer());
	}

	@Override
	protected Class<TwoPhaseCommitSinkFunction.State<
			FlinkKafkaProducer.KafkaTransactionState,
			FlinkKafkaProducer.KafkaTransactionContext>> getTypeClass() {
		return (Class) TwoPhaseCommitSinkFunction.State.class;
	}

	@Override
	protected int getLength() {
		return -1;
	}

	@Override
	protected TwoPhaseCommitSinkFunction.State<
		FlinkKafkaProducer.KafkaTransactionState,
		FlinkKafkaProducer.KafkaTransactionContext>[] getTestData() {
		//noinspection unchecked
		return new TwoPhaseCommitSinkFunction.State[] {
			new TwoPhaseCommitSinkFunction.State<
				FlinkKafkaProducer.KafkaTransactionState,
				FlinkKafkaProducer.KafkaTransactionContext>(
					new TransactionHolder(new FlinkKafkaProducer.KafkaTransactionState("fake", 1L, (short) 42, null), 0),
					Collections.emptyList(),
					Optional.empty()),
			new TwoPhaseCommitSinkFunction.State<
				FlinkKafkaProducer.KafkaTransactionState,
				FlinkKafkaProducer.KafkaTransactionContext>(
				new TransactionHolder(new FlinkKafkaProducer.KafkaTransactionState("fake", 1L, (short) 42, null), 2711),
				Collections.singletonList(new TransactionHolder(new FlinkKafkaProducer.KafkaTransactionState("fake", 1L, (short) 42, null), 42)),
				Optional.empty()),
			new TwoPhaseCommitSinkFunction.State<
				FlinkKafkaProducer.KafkaTransactionState,
				FlinkKafkaProducer.KafkaTransactionContext>(
				new TransactionHolder(new FlinkKafkaProducer.KafkaTransactionState("fake", 1L, (short) 42, null), 0),
				Collections.emptyList(),
				Optional.of(new FlinkKafkaProducer.KafkaTransactionContext(Collections.emptySet()))),
			new TwoPhaseCommitSinkFunction.State<
				FlinkKafkaProducer.KafkaTransactionState,
				FlinkKafkaProducer.KafkaTransactionContext>(
				new TransactionHolder(new FlinkKafkaProducer.KafkaTransactionState("fake", 1L, (short) 42, null), 0),
				Collections.emptyList(),
				Optional.of(new FlinkKafkaProducer.KafkaTransactionContext(Collections.singleton("hello")))),
			new TwoPhaseCommitSinkFunction.State<
				FlinkKafkaProducer.KafkaTransactionState,
				FlinkKafkaProducer.KafkaTransactionContext>(
				new TransactionHolder(new FlinkKafkaProducer.KafkaTransactionState("fake", 1L, (short) 42, null), 0),
				Collections.singletonList(new TransactionHolder(new FlinkKafkaProducer.KafkaTransactionState("fake", 1L, (short) 42, null), 0)),
				Optional.of(new FlinkKafkaProducer.KafkaTransactionContext(Collections.emptySet()))),
			new TwoPhaseCommitSinkFunction.State<
				FlinkKafkaProducer.KafkaTransactionState,
				FlinkKafkaProducer.KafkaTransactionContext>(
				new TransactionHolder(new FlinkKafkaProducer.KafkaTransactionState("fake", 1L, (short) 42, null), 0),
				Collections.singletonList(new TransactionHolder(new FlinkKafkaProducer.KafkaTransactionState("fake", 1L, (short) 42, null), 0)),
				Optional.of(new FlinkKafkaProducer.KafkaTransactionContext(Collections.singleton("hello"))))
		};
	}

	@Override
	public void testInstantiate() {
		// this serializer does not support instantiation
	}
}