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KafkaPartitionSplitSerializer.java
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KafkaPartitionSplitSerializer.java
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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.flink.connector.kafka.source.split;
import org.apache.flink.annotation.Internal;
import org.apache.flink.core.io.SimpleVersionedSerializer;
import org.apache.kafka.common.TopicPartition;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
/**
* The {@link org.apache.flink.core.io.SimpleVersionedSerializer serializer} for {@link
* KafkaPartitionSplit}.
*/
@Internal
public class KafkaPartitionSplitSerializer
implements SimpleVersionedSerializer<KafkaPartitionSplit> {
private static final int CURRENT_VERSION = 0;
@Override
public int getVersion() {
return CURRENT_VERSION;
}
@Override
public byte[] serialize(KafkaPartitionSplit split) throws IOException {
try (ByteArrayOutputStream baos = new ByteArrayOutputStream();
DataOutputStream out = new DataOutputStream(baos)) {
out.writeUTF(split.getTopic());
out.writeInt(split.getPartition());
out.writeLong(split.getStartingOffset());
out.writeLong(split.getStoppingOffset().orElse(KafkaPartitionSplit.NO_STOPPING_OFFSET));
out.flush();
return baos.toByteArray();
}
}
@Override
public KafkaPartitionSplit deserialize(int version, byte[] serialized) throws IOException {
try (ByteArrayInputStream bais = new ByteArrayInputStream(serialized);
DataInputStream in = new DataInputStream(bais)) {
String topic = in.readUTF();
int partition = in.readInt();
long offset = in.readLong();
long stoppingOffset = in.readLong();
return new KafkaPartitionSplit(
new TopicPartition(topic, partition), offset, stoppingOffset);
}
}
}