smiklosovic commented on code in PR #4458: URL: https://github.com/apache/cassandra/pull/4458#discussion_r2489829637
########## src/java/org/apache/cassandra/db/compression/CompressionDictionaryDetailsTabularData.java: ########## @@ -0,0 +1,229 @@ +/* + * 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.cassandra.db.compression; + +import java.util.Arrays; +import javax.management.openmbean.ArrayType; +import javax.management.openmbean.CompositeData; +import javax.management.openmbean.CompositeDataSupport; +import javax.management.openmbean.CompositeType; +import javax.management.openmbean.OpenDataException; +import javax.management.openmbean.OpenType; +import javax.management.openmbean.SimpleType; +import javax.management.openmbean.TabularDataSupport; +import javax.management.openmbean.TabularType; + +import static java.lang.String.format; + +public class CompressionDictionaryDetailsTabularData +{ + public static final String KEYSPACE_NAME = "Keyspace"; + public static final String TABLE_NAME = "Table"; + public static final String DICT_ID_NAME = "DictId"; + public static final String DICT_NAME = "Dict"; + public static final String KIND_NAME = "Kind"; + public static final String CHECKSUM_NAME = "Checksum"; + public static final String SIZE_NAME = "Size"; + + + private static final String[] ITEM_NAMES = new String[]{ KEYSPACE_NAME, + TABLE_NAME, + DICT_ID_NAME, + DICT_NAME, + KIND_NAME, + CHECKSUM_NAME, + SIZE_NAME }; + + private static final String[] ITEM_DESCS = new String[]{ "keyspace", + "table", + "dictionary_id", + "dictionary_bytes", + "kind", + "checksum", + "size" }; + + private static final String TYPE_NAME = "DictionaryDetails"; + private static final String ROW_DESC = "DictionaryDetails"; + private static final OpenType<?>[] ITEM_TYPES; + private static final CompositeType COMPOSITE_TYPE; + public static final TabularType TABULAR_TYPE; + + static + { + try + { + ITEM_TYPES = new OpenType[]{ SimpleType.STRING, // keyspace + SimpleType.STRING, // table + SimpleType.LONG, // dict id + new ArrayType<String[]>(SimpleType.BYTE, true), // dict bytes + SimpleType.STRING, // kind + SimpleType.INTEGER, // checksum + SimpleType.INTEGER }; // size of dict bytes + + COMPOSITE_TYPE = new CompositeType(TYPE_NAME, ROW_DESC, ITEM_NAMES, ITEM_DESCS, ITEM_TYPES); + TABULAR_TYPE = new TabularType(TYPE_NAME, ROW_DESC, COMPOSITE_TYPE, ITEM_NAMES); + } + catch (OpenDataException e) + { + throw new RuntimeException(e); + } + } + + public static void from(String keyspace, + String table, + CompressionDictionary dictionary, + TabularDataSupport result) + { + result.put(from(keyspace, table, dictionary)); + } + + public static CompositeData from(String keyspace, String table, CompressionDictionary dictionary) + { + try + { + return new CompositeDataSupport(COMPOSITE_TYPE, + ITEM_NAMES, + new Object[] + { + keyspace, + table, + dictionary.dictId().id, + dictionary.rawDictionary(), + dictionary.kind().name(), + dictionary.checksum(), + dictionary.size(), + }); + } + catch (OpenDataException e) + { + throw new RuntimeException(e); + } + } + + public static CompositeData from(CompressionDictionaryPojo pojo) + { + try + { + return new CompositeDataSupport(COMPOSITE_TYPE, + ITEM_NAMES, + new Object[] + { + pojo.keyspace, + pojo.table, + pojo.dictId, + pojo.dict, + pojo.kind, + pojo.dictChecksum, + pojo.dictLength + }); + } + catch (OpenDataException e) + { + throw new RuntimeException(e); + } + } + + /** + * Deserializes data to convenience object to work further with. + * + * @param compositeData data to create pojo from + * @return deserialized composite data to convenience object + * @throws IllegalArgumentException if values in deserialized object are invalid. + * @see CompressionDictionaryPojo#validate() + */ + public static CompressionDictionaryPojo from(CompositeData compositeData) + { + String keyspace = (String) compositeData.get(CompressionDictionaryDetailsTabularData.KEYSPACE_NAME); + String table = (String) compositeData.get(CompressionDictionaryDetailsTabularData.TABLE_NAME); + long dictId = (Long) compositeData.get(CompressionDictionaryDetailsTabularData.DICT_ID_NAME); + byte[] dictionaryBytes = (byte[]) compositeData.get(CompressionDictionaryDetailsTabularData.DICT_NAME); + String kind = (String) compositeData.get(CompressionDictionaryDetailsTabularData.KIND_NAME); + int checksum = (Integer) compositeData.get(CompressionDictionaryDetailsTabularData.CHECKSUM_NAME); + int size = (Integer) compositeData.get(CompressionDictionaryDetailsTabularData.SIZE_NAME); + + CompressionDictionaryPojo pojo = new CompressionDictionaryPojo(); + pojo.keyspace = keyspace; + pojo.table = table; + pojo.dictId = dictId; + pojo.dict = dictionaryBytes; + pojo.kind = kind; + pojo.dictChecksum = checksum; + pojo.dictLength = size; + + pojo.validate(); + + return pojo; + } + + public static class CompressionDictionaryPojo + { + public String keyspace; + public String table; + public long dictId; + public byte[] dict; + public String kind; + public int dictChecksum; + public int dictLength; + + /** + * Dictionary is valid if, keyspace and table are specified, dictionary id is strictly positive integer, + * dictionary byte array is not nor not empty, Review Comment: I remove whole comemnt for now, will add that when dust settles. -- This is an automated message from the Apache Git Service. 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