ggershinsky commented on a change in pull request #615: URL: https://github.com/apache/parquet-mr/pull/615#discussion_r440027472
########## File path: parquet-hadoop/src/main/java/org/apache/parquet/crypto/keytools/HadoopFSKeyMaterialStore.java ########## @@ -0,0 +1,127 @@ +/* + * 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.parquet.crypto.keytools; + +import org.apache.hadoop.conf.Configuration; +import org.apache.hadoop.fs.FSDataInputStream; +import org.apache.hadoop.fs.FSDataOutputStream; +import org.apache.hadoop.fs.FileSystem; +import org.apache.hadoop.fs.Path; +import org.apache.parquet.crypto.ParquetCryptoRuntimeException; +import org.codehaus.jackson.JsonNode; +import org.codehaus.jackson.map.ObjectMapper; +import org.codehaus.jackson.type.TypeReference; + +import java.io.IOException; +import java.util.HashMap; +import java.util.Map; +import java.util.Set; + +public class HadoopFSKeyMaterialStore implements FileKeyMaterialStore { + + public final static String KEY_MATERIAL_FILE_PREFIX = "_KEY_MATERIAL_FOR_"; + public static final String TEMP_FILE_PREFIX = "_TMP"; + public final static String KEY_MATERIAL_FILE_SUFFFIX = ".json"; + private static final ObjectMapper objectMapper = new ObjectMapper(); + + private FileSystem hadoopFileSystem; + private Map<String, String> keyMaterialMap; + private Path keyMaterialFile; + + HadoopFSKeyMaterialStore(FileSystem hadoopFileSystem) { + this.hadoopFileSystem = hadoopFileSystem; + } + + @Override + public void initialize(Path parquetFilePath, Configuration hadoopConfig, boolean tempStore) { + String fullPrefix = (tempStore? TEMP_FILE_PREFIX : ""); + fullPrefix += KEY_MATERIAL_FILE_PREFIX; + keyMaterialFile = new Path(parquetFilePath.getParent(), + fullPrefix + parquetFilePath.getName() + KEY_MATERIAL_FILE_SUFFFIX); + } + + @Override + public void addKeyMaterial(String keyIDInFile, String keyMaterial) throws ParquetCryptoRuntimeException { + if (null == keyMaterialMap) { + keyMaterialMap = new HashMap<>(); + } + keyMaterialMap.put(keyIDInFile, keyMaterial); + } + + @Override + public String getKeyMaterial(String keyIDInFile) throws ParquetCryptoRuntimeException { + if (null == keyMaterialMap) { + loadKeyMaterialMap(); + } + return keyMaterialMap.get(keyIDInFile); + } + + private void loadKeyMaterialMap() { + try (FSDataInputStream keyMaterialStream = hadoopFileSystem.open(keyMaterialFile)) { + JsonNode keyMaterialJson = objectMapper.readTree(keyMaterialStream); + keyMaterialMap = objectMapper.readValue(keyMaterialJson, + new TypeReference<Map<String, String>>() { }); + } catch (IOException e) { + throw new ParquetCryptoRuntimeException("Failed to get key material from " + keyMaterialFile, e); + } + } + + @Override + public void saveMaterial() throws ParquetCryptoRuntimeException { + // TODO needed? Path qualifiedPath = parquetFilePath.makeQualified(hadoopFileSystem); + try (FSDataOutputStream keyMaterialStream = hadoopFileSystem.create(keyMaterialFile)) { + objectMapper.writeValue(keyMaterialStream, keyMaterialMap); + } catch (IOException e) { + throw new ParquetCryptoRuntimeException("Failed to save key material in " + keyMaterialFile, e); + } + } + + @Override + public Set<String> getKeyIDSet() throws ParquetCryptoRuntimeException { + if (null == keyMaterialMap) { + loadKeyMaterialMap(); + } + + return keyMaterialMap.keySet(); Review comment: need to walk back this one. We process the footer key entry first, and then remove it from the set/map to loop on the columns only. ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: us...@infra.apache.org
