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ORC-1305: Add
CompressionWriter
and `InMemoryEncryption[Reader|Writ…
…er]` examples ### What changes were proposed in this pull request? This PR is aimed to add more java examples. ### Why are the changes needed? We need more examples in **InMemoryCryption** and **Compression**. ### How was this patch tested? UT Closes apache#1302 from deshanxiao/deshan/add-more-example. Authored-by: deshanxiao <deshanxiao@microsoft.com> Signed-off-by: Dongjoon Hyun <dongjoon@apache.org>
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java/examples/src/java/org/apache/orc/examples/CompressionWriter.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 | ||
* <p/> | ||
* http://www.apache.org/licenses/LICENSE-2.0 | ||
* <p/> | ||
* 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.orc.examples; | ||
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import org.apache.hadoop.conf.Configuration; | ||
import org.apache.hadoop.fs.Path; | ||
import org.apache.hadoop.hive.ql.exec.vector.BytesColumnVector; | ||
import org.apache.hadoop.hive.ql.exec.vector.LongColumnVector; | ||
import org.apache.hadoop.hive.ql.exec.vector.VectorizedRowBatch; | ||
import org.apache.orc.OrcFile; | ||
import org.apache.orc.OrcFile.WriterOptions; | ||
import org.apache.orc.TypeDescription; | ||
import org.apache.orc.Writer; | ||
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import java.io.IOException; | ||
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import static org.apache.orc.CompressionKind.SNAPPY; | ||
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public class CompressionWriter { | ||
public static void main(Configuration conf, String[] args) throws IOException { | ||
TypeDescription schema = TypeDescription.fromString("struct<x:int,y:string>"); | ||
// Set compress kind to snappy. Now we have much compression | ||
// method such as ZLIB, SNAPPY, LZO, LZ4, ZSTD. | ||
WriterOptions options = OrcFile.writerOptions(conf).setSchema(schema).compress(SNAPPY); | ||
Writer snappyWriter = OrcFile.createWriter(new Path("compressed.orc"), options); | ||
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VectorizedRowBatch batch = schema.createRowBatch(); | ||
LongColumnVector x = (LongColumnVector) batch.cols[0]; | ||
BytesColumnVector y = (BytesColumnVector) batch.cols[1]; | ||
for (int r = 0; r < 10000; ++r) { | ||
int row = batch.size++; | ||
x.vector[row] = r; | ||
byte[] buffer = ("byte-" + r).getBytes(); | ||
y.setRef(row, buffer, 0, buffer.length); | ||
// If the batch is full, write it out and start over. | ||
if (batch.size == batch.getMaxSize()) { | ||
snappyWriter.addRowBatch(batch); | ||
batch.reset(); | ||
} | ||
} | ||
if (batch.size != 0) { | ||
snappyWriter.addRowBatch(batch); | ||
} | ||
snappyWriter.close(); | ||
} | ||
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public static void main(String[] args) throws IOException { | ||
main(new Configuration(), args); | ||
} | ||
} |
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java/examples/src/java/org/apache/orc/examples/InMemoryEncryptionReader.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 | ||
* <p/> | ||
* http://www.apache.org/licenses/LICENSE-2.0 | ||
* <p/> | ||
* 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.orc.examples; | ||
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import org.apache.hadoop.conf.Configuration; | ||
import org.apache.hadoop.fs.Path; | ||
import org.apache.hadoop.hive.ql.exec.vector.BytesColumnVector; | ||
import org.apache.hadoop.hive.ql.exec.vector.LongColumnVector; | ||
import org.apache.hadoop.hive.ql.exec.vector.VectorizedRowBatch; | ||
import org.apache.orc.InMemoryKeystore; | ||
import org.apache.orc.OrcFile; | ||
import org.apache.orc.OrcFile.ReaderOptions; | ||
import org.apache.orc.Reader; | ||
import org.apache.orc.RecordReader; | ||
import org.apache.orc.TypeDescription; | ||
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import java.io.IOException; | ||
import java.nio.charset.StandardCharsets; | ||
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import static org.apache.orc.EncryptionAlgorithm.AES_CTR_128; | ||
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public class InMemoryEncryptionReader { | ||
public static void main(Configuration conf, String[] args) throws IOException { | ||
byte[] kmsKey = "secret123".getBytes(StandardCharsets.UTF_8); | ||
// InMemoryKeystore is used to get key to read encryption data. | ||
InMemoryKeystore keyProvider = new InMemoryKeystore().addKey("pii", AES_CTR_128, kmsKey); | ||
ReaderOptions readerOptions = OrcFile.readerOptions(conf).setKeyProvider(keyProvider); | ||
Reader reader = OrcFile.createReader(new Path("encrypted.orc"), readerOptions); | ||
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System.out.println("File schema: " + reader.getSchema()); | ||
System.out.println("Row count: " + reader.getNumberOfRows()); | ||
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// Pick the schema we want to read using schema evolution | ||
TypeDescription schema = TypeDescription.fromString("struct<x:int,y:string>"); | ||
// Read the encryption data | ||
VectorizedRowBatch batch = schema.createRowBatch(); | ||
RecordReader rowIterator = reader.rows(reader.options().schema(schema)); | ||
LongColumnVector x = (LongColumnVector) batch.cols[0]; | ||
BytesColumnVector y = (BytesColumnVector) batch.cols[1]; | ||
while (rowIterator.nextBatch(batch)) { | ||
for (int row = 0; row < batch.size; ++row) { | ||
System.out.println("x: " + x.vector[row]); | ||
System.out.println("y: " + y.toString(row)); | ||
} | ||
} | ||
rowIterator.close(); | ||
} | ||
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public static void main(String[] args) throws IOException { | ||
main(new Configuration(), args); | ||
} | ||
} |
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java/examples/src/java/org/apache/orc/examples/InMemoryEncryptionWriter.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 | ||
* <p/> | ||
* http://www.apache.org/licenses/LICENSE-2.0 | ||
* <p/> | ||
* 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.orc.examples; | ||
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import org.apache.hadoop.conf.Configuration; | ||
import org.apache.hadoop.fs.Path; | ||
import org.apache.hadoop.hive.ql.exec.vector.BytesColumnVector; | ||
import org.apache.hadoop.hive.ql.exec.vector.LongColumnVector; | ||
import org.apache.hadoop.hive.ql.exec.vector.VectorizedRowBatch; | ||
import org.apache.orc.InMemoryKeystore; | ||
import org.apache.orc.OrcFile; | ||
import org.apache.orc.OrcFile.WriterOptions; | ||
import org.apache.orc.TypeDescription; | ||
import org.apache.orc.Writer; | ||
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import java.io.IOException; | ||
import java.nio.charset.StandardCharsets; | ||
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import static org.apache.orc.EncryptionAlgorithm.AES_CTR_128; | ||
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public class InMemoryEncryptionWriter { | ||
public static void main(Configuration conf, String[] args) throws IOException { | ||
TypeDescription schema = TypeDescription.fromString("struct<x:int,y:string>"); | ||
byte[] kmsKey = "secret123".getBytes(StandardCharsets.UTF_8); | ||
// The primary use of InMemoryKeystore is for used who doesn't have a | ||
// Hadoop KMS. | ||
InMemoryKeystore provider = new InMemoryKeystore().addKey("pii", AES_CTR_128, kmsKey); | ||
String encryption = "pii:x,y"; | ||
WriterOptions writerOptions = | ||
OrcFile.writerOptions(conf).setSchema(schema).setKeyProvider(provider).encrypt(encryption); | ||
Writer writer = OrcFile.createWriter(new Path("encrypted.orc"), writerOptions); | ||
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VectorizedRowBatch batch = schema.createRowBatch(); | ||
LongColumnVector x = (LongColumnVector) batch.cols[0]; | ||
BytesColumnVector y = (BytesColumnVector) batch.cols[1]; | ||
for (int r = 0; r < 10000; ++r) { | ||
int row = batch.size++; | ||
x.vector[row] = r; | ||
byte[] buffer = ("byte-" + r).getBytes(); | ||
y.setRef(row, buffer, 0, buffer.length); | ||
// If the batch is full, write it out and start over. | ||
if (batch.size == batch.getMaxSize()) { | ||
writer.addRowBatch(batch); | ||
batch.reset(); | ||
} | ||
} | ||
if (batch.size != 0) { | ||
writer.addRowBatch(batch); | ||
} | ||
writer.close(); | ||
} | ||
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public static void main(String[] args) throws IOException { | ||
main(new Configuration(), args); | ||
} | ||
} |