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Support for storing result sets in Parquet format
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122 changes: 122 additions & 0 deletions
122
...kis-storage/src/main/java/org/apache/linkis/storage/resultset/ParquetResultSetReader.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,122 @@ | ||
| /* | ||
| * 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. | ||
| */ | ||
|
|
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| package org.apache.linkis.storage.resultset; | ||
|
|
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| import org.apache.linkis.common.io.FsPath; | ||
| import org.apache.linkis.common.io.MetaData; | ||
| import org.apache.linkis.common.io.Record; | ||
| import org.apache.linkis.common.io.resultset.ResultSet; | ||
| import org.apache.linkis.storage.domain.Column; | ||
| import org.apache.linkis.storage.domain.DataType; | ||
| import org.apache.linkis.storage.resultset.table.TableMetaData; | ||
| import org.apache.linkis.storage.resultset.table.TableRecord; | ||
|
|
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| import org.apache.avro.Schema; | ||
| import org.apache.avro.generic.GenericRecord; | ||
| import org.apache.hadoop.fs.Path; | ||
| import org.apache.parquet.avro.AvroParquetReader; | ||
| import org.apache.parquet.hadoop.ParquetReader; | ||
|
|
||
| import java.io.IOException; | ||
| import java.io.InputStream; | ||
| import java.util.ArrayList; | ||
| import java.util.List; | ||
| import java.util.stream.Collectors; | ||
|
|
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| import org.slf4j.Logger; | ||
| import org.slf4j.LoggerFactory; | ||
|
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| public class ParquetResultSetReader<K extends MetaData, V extends Record> | ||
| extends StorageResultSetReader { | ||
|
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| private static final Logger logger = LoggerFactory.getLogger(ParquetResultSetReader.class); | ||
|
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| private FsPath fsPath; | ||
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| private ParquetReader<GenericRecord> parquetReader; | ||
|
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| private GenericRecord record; | ||
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| public ParquetResultSetReader(ResultSet resultSet, InputStream inputStream, FsPath fsPath) | ||
| throws IOException { | ||
| super(resultSet, inputStream); | ||
| this.fsPath = fsPath; | ||
| this.parquetReader = | ||
| AvroParquetReader.<GenericRecord>builder(new Path(fsPath.getPath())).build(); | ||
| this.record = parquetReader.read(); | ||
| } | ||
|
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| @Override | ||
| public MetaData getMetaData() { | ||
| if (metaData == null) { | ||
| try { | ||
| List<Schema.Field> fields = record.getSchema().getFields(); | ||
| List<Column> columnList = | ||
| fields.stream() | ||
| .map( | ||
| field -> | ||
| new Column( | ||
| field.name(), | ||
| DataType.toDataType(field.schema().getType().getName()), | ||
| "")) | ||
| .collect(Collectors.toList()); | ||
|
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| metaData = new TableMetaData(columnList.toArray(new Column[0])); | ||
| } catch (Exception e) { | ||
| throw new RuntimeException("Failed to read parquet schema", e); | ||
| } | ||
| } | ||
| return metaData; | ||
| } | ||
|
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| @Override | ||
| public boolean hasNext() throws IOException { | ||
| if (metaData == null) getMetaData(); | ||
| if (record == null) return false; | ||
| ArrayList<Object> resultList = new ArrayList<>(); | ||
| TableMetaData tableMetaData = (TableMetaData) metaData; | ||
| int length = tableMetaData.getColumns().length; | ||
| for (int i = 0; i < length; i++) { | ||
| resultList.add(record.get(i)); | ||
| } | ||
| row = new TableRecord(resultList.toArray(new Object[0])); | ||
| if (row == null) return false; | ||
| return record != null; | ||
| } | ||
|
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| @Override | ||
| public Record getRecord() { | ||
| if (metaData == null) throw new RuntimeException("Must read metadata first(必须先读取metadata)"); | ||
| if (row == null) { | ||
| throw new RuntimeException( | ||
| "Can't get the value of the field, maybe the IO stream has been read or has been closed!(拿不到字段的值，也许IO流已读取完毕或已被关闭！)"); | ||
| } | ||
| try { | ||
| this.record = parquetReader.read(); | ||
| } catch (IOException e) { | ||
| throw new RuntimeException("Failed to read parquet record", e); | ||
| } | ||
| return row; | ||
| } | ||
|
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| @Override | ||
| public void close() throws IOException { | ||
| super.close(); | ||
| parquetReader.close(); | ||
| } | ||
| } |
95 changes: 95 additions & 0 deletions
95
...kis-storage/src/main/java/org/apache/linkis/storage/resultset/ParquetResultSetWriter.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,95 @@ | ||
| /* | ||
| * 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. | ||
| */ | ||
|
|
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| package org.apache.linkis.storage.resultset; | ||
|
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| import org.apache.linkis.common.io.FsPath; | ||
| import org.apache.linkis.common.io.MetaData; | ||
| import org.apache.linkis.common.io.Record; | ||
| import org.apache.linkis.common.io.resultset.ResultSet; | ||
| import org.apache.linkis.storage.domain.Column; | ||
| import org.apache.linkis.storage.resultset.table.TableMetaData; | ||
| import org.apache.linkis.storage.resultset.table.TableRecord; | ||
|
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| import org.apache.avro.Schema; | ||
| import org.apache.avro.SchemaBuilder; | ||
| import org.apache.avro.generic.GenericData; | ||
| import org.apache.avro.generic.GenericRecord; | ||
| import org.apache.hadoop.fs.Path; | ||
| import org.apache.parquet.avro.AvroParquetWriter; | ||
| import org.apache.parquet.hadoop.ParquetFileWriter; | ||
| import org.apache.parquet.hadoop.ParquetWriter; | ||
| import org.apache.parquet.hadoop.metadata.CompressionCodecName; | ||
|
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| import java.io.IOException; | ||
|
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| import org.slf4j.Logger; | ||
| import org.slf4j.LoggerFactory; | ||
|
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| public class ParquetResultSetWriter<K extends MetaData, V extends Record> | ||
| extends StorageResultSetWriter { | ||
| private static final Logger logger = LoggerFactory.getLogger(ParquetResultSetWriter.class); | ||
|
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| private Schema schema = null; | ||
|
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| public ParquetResultSetWriter(ResultSet resultSet, long maxCacheSize, FsPath storePath) { | ||
| super(resultSet, maxCacheSize, storePath); | ||
| } | ||
|
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| @Override | ||
| public void addMetaData(MetaData metaData) throws IOException { | ||
| if (!moveToWriteRow) { | ||
| rMetaData = metaData; | ||
| SchemaBuilder.FieldAssembler<Schema> fieldAssembler = SchemaBuilder.record("linkis").fields(); | ||
| TableMetaData tableMetaData = (TableMetaData) rMetaData; | ||
| for (Column column : tableMetaData.columns) { | ||
| fieldAssembler | ||
| .name(column.getColumnName().replaceAll("\\.", "_").replaceAll("[^a-zA-Z0-9_]", "")) | ||
| .doc(column.getComment()) | ||
| .type(column.getDataType().getTypeName().toLowerCase()) | ||
| .noDefault(); | ||
| } | ||
| schema = fieldAssembler.endRecord(); | ||
| moveToWriteRow = true; | ||
| } | ||
| } | ||
|
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| @Override | ||
| public void addRecord(Record record) { | ||
| if (moveToWriteRow) { | ||
| try { | ||
| TableRecord tableRecord = (TableRecord) record; | ||
| Object[] row = tableRecord.row; | ||
| try (ParquetWriter<GenericRecord> writer = | ||
| AvroParquetWriter.<GenericRecord>builder(new Path(storePath.getPath())) | ||
| .withSchema(schema) | ||
| .withCompressionCodec(CompressionCodecName.SNAPPY) | ||
| .withWriteMode(ParquetFileWriter.Mode.OVERWRITE) | ||
| .build()) { | ||
|
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| GenericRecord genericRecord = new GenericData.Record(schema); | ||
| for (int i = 0; i < row.length; i++) { | ||
| genericRecord.put(schema.getFields().get(i).name(), row[i]); | ||
| } | ||
| writer.write(genericRecord); | ||
| } | ||
| } catch (Exception e) { | ||
| logger.warn("addMetaDataAndRecordString failed", e); | ||
| } | ||
| } | ||
| } | ||
| } |
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