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54 changes: 54 additions & 0 deletions
54
...er-iceberg/src/main/scala/com/adform/streamloader/iceberg/IcebergRecordBatchStorage.scala
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,54 @@ | ||
| /* | ||
| * Copyright (c) 2020 Adform | ||
| * | ||
| * This Source Code Form is subject to the terms of the Mozilla Public | ||
| * License, v. 2.0. If a copy of the MPL was not distributed with this | ||
| * file, You can obtain one at http://mozilla.org/MPL/2.0/. | ||
| */ | ||
|
|
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| package com.adform.streamloader.iceberg | ||
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| import com.adform.streamloader.model.{StreamPosition, Timestamp} | ||
| import com.adform.streamloader.sink.batch.storage.InDataOffsetBatchStorage | ||
| import org.apache.iceberg.Table | ||
| import org.apache.kafka.common.TopicPartition | ||
|
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| /** | ||
| * Iceberg record batch storage that appends multiple files and stores Kafka offsets in table properties | ||
| * in a single atomic table transaction. | ||
| */ | ||
| class IcebergRecordBatchStorage(table: Table) extends InDataOffsetBatchStorage[IcebergRecordBatch] { | ||
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| private def offsetKey(topic: String, partition: Int): String = { | ||
| s"__consumer_offset:${kafkaContext.consumerGroup}:$topic:$partition" | ||
| } | ||
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| override def recover(topicPartitions: Set[TopicPartition]): Unit = {} | ||
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| override def commitBatchWithOffsets(batch: IcebergRecordBatch): Unit = { | ||
| val transaction = table.newTransaction() | ||
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| batch.dataWriteResult.dataFiles().forEach(file => transaction.newAppend().appendFile(file).commit()) | ||
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| batch.recordRanges.foreach(range => { | ||
| transaction | ||
| .updateProperties() | ||
| .set(offsetKey(range.topic, range.partition), s"${range.end.offset}:${range.end.watermark.millis}") | ||
| .commit() | ||
| }) | ||
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| transaction.commitTransaction() | ||
| log.info(s"Successfully commited Iceberg transaction for ranges ${batch.recordRanges.mkString(",")}") | ||
| } | ||
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| override def committedPositions(topicPartitions: Set[TopicPartition]): Map[TopicPartition, Option[StreamPosition]] = { | ||
| topicPartitions | ||
| .map(tp => { | ||
| tp -> Option(table.properties().get(offsetKey(tp.topic(), tp.partition()))).map(offsetWatermark => { | ||
| val Array(o, w) = offsetWatermark.split(':') | ||
| StreamPosition(o.toLong + 1, Timestamp(w.toLong)) | ||
| }) | ||
| }) | ||
| .toMap | ||
| } | ||
| } |
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