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156 changes: 156 additions & 0 deletions
156
java/examples/src/main/java/org/apache/tsfile/v4/ITsFileReaderAndITsFileWriter.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.tsfile.v4; | ||
|
|
||
| import org.apache.tsfile.enums.TSDataType; | ||
| import org.apache.tsfile.exception.write.WriteProcessException; | ||
| import org.apache.tsfile.file.metadata.ColumnSchemaBuilder; | ||
| import org.apache.tsfile.file.metadata.TableSchema; | ||
| import org.apache.tsfile.fileSystem.FSFactoryProducer; | ||
| import org.apache.tsfile.read.query.dataset.ResultSet; | ||
| import org.apache.tsfile.read.query.dataset.ResultSetMetadata; | ||
| import org.apache.tsfile.read.v4.ITsFileReader; | ||
| import org.apache.tsfile.read.v4.TsFileReaderBuilder; | ||
| import org.apache.tsfile.write.record.Tablet; | ||
| import org.apache.tsfile.write.v4.ITsFileWriter; | ||
| import org.apache.tsfile.write.v4.TsFileWriterBuilder; | ||
|
|
||
| import org.slf4j.Logger; | ||
| import org.slf4j.LoggerFactory; | ||
|
|
||
| import java.io.File; | ||
| import java.io.IOException; | ||
| import java.nio.file.Files; | ||
| import java.util.Arrays; | ||
| import java.util.StringJoiner; | ||
|
|
||
| public class ITsFileReaderAndITsFileWriter { | ||
|
|
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| private static final Logger LOGGER = LoggerFactory.getLogger(ITsFileReaderAndITsFileWriter.class); | ||
|
|
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| public static void main(String[] args) throws IOException { | ||
| String path = "test.tsfile"; | ||
| File f = FSFactoryProducer.getFSFactory().getFile(path); | ||
| if (f.exists()) { | ||
| Files.delete(f.toPath()); | ||
| } | ||
|
|
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| String tableName = "table1"; | ||
|
|
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| TableSchema tableSchema = | ||
| new TableSchema( | ||
| tableName, | ||
| Arrays.asList( | ||
| new ColumnSchemaBuilder() | ||
| .name("id1") | ||
| .dataType(TSDataType.STRING) | ||
| .category(Tablet.ColumnCategory.ID) | ||
| .build(), | ||
| new ColumnSchemaBuilder() | ||
| .name("id2") | ||
| .dataType(TSDataType.STRING) | ||
| .category(Tablet.ColumnCategory.ID) | ||
| .build(), | ||
| new ColumnSchemaBuilder() | ||
| .name("s1") | ||
| .dataType(TSDataType.INT32) | ||
| .category(Tablet.ColumnCategory.MEASUREMENT) | ||
| .build(), | ||
| new ColumnSchemaBuilder().name("s2").dataType(TSDataType.BOOLEAN).build())); | ||
|
|
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| Tablet tablet = | ||
| new Tablet( | ||
| Arrays.asList("id1", "id2", "s1", "s2"), | ||
| Arrays.asList( | ||
| TSDataType.STRING, TSDataType.STRING, TSDataType.INT32, TSDataType.BOOLEAN)); | ||
| for (int row = 0; row < 5; row++) { | ||
| long timestamp = row; | ||
| tablet.addTimestamp(row, timestamp); | ||
| tablet.addValue(row, "id1", "id1_filed_1"); | ||
| tablet.addValue(row, "id2", "id2_filed_1"); | ||
| tablet.addValue(row, "s1", row); | ||
| // null value | ||
| // tablet.addValue(row, "s2", true); | ||
| } | ||
| for (int row = 5; row < 10; row++) { | ||
| long timestamp = row; | ||
| tablet.addTimestamp(row, timestamp); | ||
|
|
||
| // id1 column | ||
| tablet.addValue(row, 0, "id1_field_2"); | ||
|
|
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| // id2 column | ||
| tablet.addValue(row, 1, "id1_field_2"); | ||
|
|
||
| // s1 column: null value | ||
| // tablet.addValue(row, 2, row); | ||
|
|
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| // s2 column | ||
| tablet.addValue(row, 3, false); | ||
| } | ||
|
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| long memoryThreshold = 10 * 1024 * 1024; | ||
| // tableSchema and file are required. memoryThreshold is an optional parameter, default value is | ||
| // 32 * 1024 * 1024 byte. | ||
| try (ITsFileWriter writer = | ||
| new TsFileWriterBuilder() | ||
| .file(f) | ||
| .tableSchema(tableSchema) | ||
| .memoryThreshold(memoryThreshold) | ||
| .build()) { | ||
| writer.write(tablet); | ||
| } catch (WriteProcessException e) { | ||
| LOGGER.error("meet error in TsFileWrite ", e); | ||
| } | ||
|
|
||
| // file is a required parameter | ||
| try (ITsFileReader reader = new TsFileReaderBuilder().file(f).build()) { | ||
| ResultSet resultSet = reader.query(tableName, Arrays.asList("id1", "id2", "s1", "s2"), 2, 8); | ||
| // first column is Time | ||
| ResultSetMetadata metadata = resultSet.getMetadata(); | ||
| System.out.println(metadata); | ||
| while (resultSet.next()) { | ||
| StringJoiner sj = new StringJoiner(" "); | ||
| for (int column = 1; column <= 5; column++) { | ||
| sj.add(metadata.getColumnName(column) + "(" + metadata.getColumnType(column) + ") "); | ||
| } | ||
| System.out.println(sj.toString()); | ||
|
|
||
| // columnIndex starts from 1 | ||
| // Time id1 id2 s1 s2 | ||
| Long timeField = resultSet.getLong("Time"); | ||
| String id1Field = resultSet.isNull("id1") ? null : resultSet.getString("id1"); | ||
| String id2Field = resultSet.isNull("id2") ? null : resultSet.getString("id2"); | ||
| Integer s1Field = resultSet.isNull("s1") ? null : resultSet.getInt(4); | ||
| Boolean s2Field = resultSet.isNull("s2") ? null : resultSet.getBoolean(5); | ||
| sj = new StringJoiner(" "); | ||
| System.out.println( | ||
| sj.add(timeField + "") | ||
| .add(id1Field) | ||
| .add(id2Field) | ||
| .add(s1Field + "") | ||
| .add(s2Field + "") | ||
| .toString()); | ||
| } | ||
| } catch (Exception e) { | ||
| LOGGER.error("meet error in TsFileRead ", e); | ||
| } | ||
| } | ||
| } |
48 changes: 48 additions & 0 deletions
48
java/tsfile/src/main/java/org/apache/tsfile/file/metadata/ColumnSchema.java
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| @@ -0,0 +1,48 @@ | ||
| /* | ||
| * 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.tsfile.file.metadata; | ||
|
|
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| import org.apache.tsfile.enums.TSDataType; | ||
| import org.apache.tsfile.write.record.Tablet; | ||
| import org.apache.tsfile.write.record.Tablet.ColumnCategory; | ||
|
|
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| public class ColumnSchema { | ||
| private String columnName; | ||
| private TSDataType dataType; | ||
| private ColumnCategory columnCategory; | ||
|
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| public ColumnSchema(String columnName, TSDataType dataType, ColumnCategory columnCategory) { | ||
| this.columnName = columnName; | ||
| this.dataType = dataType; | ||
| this.columnCategory = columnCategory; | ||
| } | ||
|
|
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| public String getColumnName() { | ||
| return columnName; | ||
| } | ||
|
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| public TSDataType getDataType() { | ||
| return dataType; | ||
| } | ||
|
|
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| public Tablet.ColumnCategory getColumnCategory() { | ||
| return columnCategory; | ||
| } | ||
| } |
64 changes: 64 additions & 0 deletions
64
java/tsfile/src/main/java/org/apache/tsfile/file/metadata/ColumnSchemaBuilder.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,64 @@ | ||
| /* | ||
| * 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.tsfile.file.metadata; | ||
|
|
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| import org.apache.tsfile.common.TsFileApi; | ||
| import org.apache.tsfile.enums.TSDataType; | ||
| import org.apache.tsfile.write.record.Tablet.ColumnCategory; | ||
|
|
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| public class ColumnSchemaBuilder { | ||
|
|
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| private String columnName; | ||
| private TSDataType columnDataType; | ||
| private ColumnCategory columnCategory = ColumnCategory.MEASUREMENT; | ||
|
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| @TsFileApi | ||
| public ColumnSchema build() { | ||
| validateNameParameters(); | ||
| return new ColumnSchema(columnName, columnDataType, columnCategory); | ||
| } | ||
|
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| @TsFileApi | ||
| public ColumnSchemaBuilder name(String columnName) { | ||
| this.columnName = columnName; | ||
| return this; | ||
| } | ||
|
|
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| @TsFileApi | ||
| public ColumnSchemaBuilder dataType(TSDataType columnType) { | ||
| this.columnDataType = columnType; | ||
| return this; | ||
| } | ||
|
|
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| @TsFileApi | ||
| public ColumnSchemaBuilder category(ColumnCategory columnCategory) { | ||
| this.columnCategory = columnCategory; | ||
| return this; | ||
| } | ||
|
|
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| private void validateNameParameters() { | ||
| if (columnName == null || columnName.trim().isEmpty()) { | ||
| throw new IllegalStateException("Column name must be set before building"); | ||
| } | ||
| if (columnDataType == null) { | ||
| throw new IllegalStateException("Column data type must be set before building"); | ||
| } | ||
| } | ||
| } |
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