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Hudi custom merger
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public class CustomHoodieSparkRecordMergert implements HoodieRecordMerger { | |
@Override | |
public Option<Pair<HoodieRecord, Schema>> merge( | |
HoodieRecord older, | |
Schema oldSchema, | |
HoodieRecord newer, | |
Schema newSchema, | |
TypedProperties props) | |
throws IOException { | |
ValidationUtils.checkArgument(older.getRecordType() == HoodieRecord.HoodieRecordType.SPARK); | |
ValidationUtils.checkArgument(newer.getRecordType() == HoodieRecord.HoodieRecordType.SPARK); | |
Object[] returnValues = extractInternalRow(newer, newSchema); | |
// Now, I want to create an Map<String, Array<Timestamp>> | |
ArrayBasedMapData mapArray = new ArrayBasedMapData( | |
ArrayData.toArrayData(new UTF8String[] {UTF8String.fromString("bar")}), | |
ArrayData.toArrayData(ArrayData.toArrayData(new long[] {103079215152L}))); | |
returnVales[2] = mapArray; | |
return forgeResult(returnValues, newSchema); | |
} | |
/** | |
UTILS METHODS | |
*/ | |
private Object[] extractInternalRow(HoodieRecord record, Schema schema) { | |
String[] fields = schema.getFields().stream().map(f -> f.name()).toArray(String[]::new); | |
return record.getColumnValues(schema, fields, true); | |
} | |
private static Option<Pair<HoodieRecord, Schema>> forgeResult( | |
Object[] returnValues, Schema newSchema) { | |
StructType targetSparkSchema = | |
HoodieInternalRowUtils.getCachedSchema( | |
newSchema); // use cached schema to avoid useless computations | |
Row row = RowFactory.create(returnValues); | |
HoodieRecord mergedRecord = new HoodieSparkRecord(toUnsafeRow(row, targetSparkSchema)); | |
return Option.of(Pair.of(mergedRecord, newSchema)); | |
} | |
public static UnsafeRow toUnsafeRow(Row row, StructType schema) { | |
UnsafeProjection proj = UnsafeProjection.create(schema); | |
return proj.apply((InternalRow) CatalystTypeConverters.convertToCatalyst(row)); | |
} | |
} |
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