beryllw commented on code in PR #1684: URL: https://github.com/apache/fluss/pull/1684#discussion_r2346102642
########## fluss-lake/fluss-lake-iceberg/src/main/java/org/apache/fluss/lake/iceberg/source/IcebergRecordReader.java: ########## @@ -0,0 +1,136 @@ +/* + * 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.fluss.lake.iceberg.source; + +import org.apache.fluss.lake.source.RecordReader; +import org.apache.fluss.record.ChangeType; +import org.apache.fluss.record.GenericRecord; +import org.apache.fluss.record.LogRecord; +import org.apache.fluss.row.ProjectedRow; +import org.apache.fluss.utils.CloseableIterator; + +import org.apache.iceberg.FileScanTask; +import org.apache.iceberg.Schema; +import org.apache.iceberg.Table; +import org.apache.iceberg.TableScan; +import org.apache.iceberg.data.IcebergGenericReader; +import org.apache.iceberg.data.Record; +import org.apache.iceberg.io.CloseableIterable; +import org.apache.iceberg.types.Types; + +import javax.annotation.Nullable; + +import java.io.IOException; +import java.time.OffsetDateTime; +import java.time.temporal.ChronoField; +import java.util.ArrayList; +import java.util.List; +import java.util.stream.IntStream; + +import static org.apache.fluss.metadata.TableDescriptor.OFFSET_COLUMN_NAME; +import static org.apache.fluss.metadata.TableDescriptor.TIMESTAMP_COLUMN_NAME; + +/** Iceberg record reader. */ +public class IcebergRecordReader implements RecordReader { + protected IcebergRecordAsFlussRecordIterator iterator; + protected @Nullable int[][] project; + protected Types.StructType struct; + + public IcebergRecordReader(FileScanTask fileScanTask, Table table, @Nullable int[][] project) { + TableScan tableScan = table.newScan(); + if (project != null) { + tableScan = applyProject(tableScan, project); + } + IcebergGenericReader reader = new IcebergGenericReader(tableScan, true); + struct = tableScan.schema().asStruct(); + this.iterator = new IcebergRecordAsFlussRecordIterator(reader.open(fileScanTask), struct); + } + + @Override + public CloseableIterator<LogRecord> read() throws IOException { + return iterator; + } + + private TableScan applyProject(TableScan tableScan, int[][] projects) { + Types.StructType structType = tableScan.schema().asStruct(); + List<Types.NestedField> cols = new ArrayList<>(projects.length + 2); + + for (int[] project : projects) { + // iceberg field index starts from 1 + cols.add(structType.field(project[0] + 1)); + } + + cols.add(structType.field(OFFSET_COLUMN_NAME)); + cols.add(structType.field(TIMESTAMP_COLUMN_NAME)); + return tableScan.project(new Schema(cols)); + } + + /** Iterator for iceberg record as fluss record. */ + public static class IcebergRecordAsFlussRecordIterator implements CloseableIterator<LogRecord> { + + private final org.apache.iceberg.io.CloseableIterator<Record> icebergRecordIterator; + + private final ProjectedRow projectedRow; + private final IcebergRecordAsFlussRow icebergRecordAsFlussRow; + + private final int logOffsetColIndex; + private final int timestampColIndex; + + public IcebergRecordAsFlussRecordIterator( + CloseableIterable<Record> icebergRecordIterator, Types.StructType struct) { + this.icebergRecordIterator = icebergRecordIterator.iterator(); + this.logOffsetColIndex = struct.fields().indexOf(struct.field(OFFSET_COLUMN_NAME)); + this.timestampColIndex = struct.fields().indexOf(struct.field(TIMESTAMP_COLUMN_NAME)); + + int[] project = IntStream.range(0, struct.fields().size() - 2).toArray(); + projectedRow = ProjectedRow.from(project); + icebergRecordAsFlussRow = new IcebergRecordAsFlussRow(); + } + + @Override + public void close() { + try { + icebergRecordIterator.close(); + } catch (Exception e) { + throw new RuntimeException("Fail to close iterator.", e); + } + } + + @Override + public boolean hasNext() { + return icebergRecordIterator.hasNext(); + } + + @Override + public LogRecord next() { + Record icebergRecord = icebergRecordIterator.next(); + long offset = icebergRecord.get(logOffsetColIndex, Long.class); + long timestamp = + icebergRecord + .get(timestampColIndex, OffsetDateTime.class) + .getLong(ChronoField.MILLI_OF_SECOND); Review Comment: Already changge to this: ``` long timestamp = icebergRecord .get(timestampColIndex, OffsetDateTime.class) .toInstant() .toEpochMilli(); ``` -- This is an automated message from the Apache Git Service. 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