jhnmora000 commented on a change in pull request #178: GORA-485 Apache Kudu datastore for Gora URL: https://github.com/apache/gora/pull/178#discussion_r316971247
########## File path: gora-kudu/src/main/java/org/apache/gora/kudu/store/KuduStore.java ########## @@ -0,0 +1,654 @@ +/* + * 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.gora.kudu.store; + +import org.apache.gora.kudu.query.KuduResult; +import java.io.IOException; +import java.io.InputStream; +import java.lang.invoke.MethodHandles; +import java.nio.ByteBuffer; +import java.nio.charset.Charset; +import java.util.ArrayList; +import java.util.List; +import java.util.Map; +import java.util.Properties; +import java.util.concurrent.ConcurrentHashMap; +import org.apache.gora.kudu.mapping.Column; +import org.apache.gora.kudu.mapping.KuduMapping; +import org.apache.gora.kudu.mapping.KuduMappingBuilder; +import org.apache.gora.kudu.utils.KuduParameters; +import org.apache.gora.persistency.impl.PersistentBase; +import org.apache.gora.query.PartitionQuery; +import org.apache.gora.query.Query; +import org.apache.gora.query.Result; +import org.apache.gora.store.impl.DataStoreBase; +import org.apache.gora.util.AvroUtils; +import org.apache.gora.util.GoraException; +import org.apache.kudu.ColumnSchema; +import org.apache.avro.Schema; +import org.apache.avro.specific.SpecificDatumReader; +import org.apache.avro.specific.SpecificDatumWriter; +import org.apache.avro.util.Utf8; +import org.apache.gora.kudu.query.KuduQuery; +import org.apache.gora.kudu.utils.KuduClientUtils; +import org.apache.gora.persistency.Persistent; +import org.apache.gora.query.impl.PartitionQueryImpl; +import org.apache.gora.util.IOUtils; +import org.apache.kudu.Type; +import org.apache.kudu.client.CreateTableOptions; +import org.apache.kudu.client.Delete; +import org.apache.kudu.client.KuduClient; +import org.apache.kudu.client.KuduException; +import org.apache.kudu.client.KuduPredicate; +import org.apache.kudu.client.KuduScanner; +import org.apache.kudu.client.KuduSession; +import org.apache.kudu.client.KuduTable; +import org.apache.kudu.client.OperationResponse; +import org.apache.kudu.client.PartialRow; +import org.apache.kudu.client.RowResult; +import org.apache.kudu.client.RowResultIterator; +import org.apache.kudu.client.SessionConfiguration; +import org.apache.kudu.client.Update; +import org.apache.kudu.client.Upsert; +import org.apache.kudu.util.DecimalUtil; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +/** + * Implementation of a Apache Kudu data store to be used by Apache Gora. + * + * @param <K> class to be used for the key + * @param <T> class to be persisted within the store + */ +public class KuduStore<K, T extends PersistentBase> extends DataStoreBase<K, T> { + + private static final Logger LOG = LoggerFactory.getLogger(MethodHandles.lookup().lookupClass()); + private static final String PARSE_MAPPING_FILE_KEY = "gora.kudu.mapping.file"; + private static final String DEFAULT_MAPPING_FILE = "gora-kudu-mapping.xml"; + private static final String XML_MAPPING_DEFINITION = "gora.mapping"; + private KuduMapping kuduMapping; + private KuduClient client; + private KuduSession session; + private KuduTable table; + + private static final ConcurrentHashMap<Schema, SpecificDatumReader<?>> readerMap = new ConcurrentHashMap<>(); + private static final ConcurrentHashMap<Schema, SpecificDatumWriter<?>> writerMap = new ConcurrentHashMap<>(); + + @Override + public void initialize(Class<K> keyClass, Class<T> persistentClass, Properties properties) throws GoraException { + try { + super.initialize(keyClass, persistentClass, properties); + KuduMappingBuilder<K, T> builder = new KuduMappingBuilder<>(this); + InputStream mappingStream; + if (properties.containsKey(XML_MAPPING_DEFINITION)) { + if (LOG.isTraceEnabled()) { + LOG.trace("{} = {}", XML_MAPPING_DEFINITION, properties.getProperty(XML_MAPPING_DEFINITION)); + } + mappingStream = org.apache.commons.io.IOUtils.toInputStream(properties.getProperty(XML_MAPPING_DEFINITION), (Charset) null); + } else { + mappingStream = getClass().getClassLoader().getResourceAsStream(getConf().get(PARSE_MAPPING_FILE_KEY, DEFAULT_MAPPING_FILE)); + } + builder.readMappingFile(mappingStream); + kuduMapping = builder.getKuduMapping(); + KuduParameters kuduParameters = KuduParameters.load(properties, getConf()); + KuduClient.KuduClientBuilder kuduClientBuilder = new KuduClient.KuduClientBuilder(kuduParameters.getMasterAddresses()); + if (kuduParameters.getBossCount() != null) { + kuduClientBuilder.bossCount(kuduParameters.getBossCount()); + } + if (kuduParameters.getDefaultAdminOperationTimeoutMs() != null) { + kuduClientBuilder.defaultAdminOperationTimeoutMs(kuduParameters.getDefaultAdminOperationTimeoutMs()); + } + if (kuduParameters.getDefaultOperationTimeoutMs() != null) { + kuduClientBuilder.defaultOperationTimeoutMs(kuduParameters.getDefaultOperationTimeoutMs()); + } + if (kuduParameters.getDefaultSocketReadTimeoutMs() != null) { + kuduClientBuilder.defaultSocketReadTimeoutMs(kuduParameters.getDefaultSocketReadTimeoutMs()); + } + if (kuduParameters.getWorkerCount() != null) { + kuduClientBuilder.workerCount(kuduParameters.getWorkerCount()); + } + if (kuduParameters.isClientStatistics() != null && !kuduParameters.isClientStatistics()) { + kuduClientBuilder.disableStatistics(); + } + client = kuduClientBuilder.build(); + session = client.newSession(); + if (kuduParameters.getFlushMode() != null) { + session.setFlushMode(SessionConfiguration.FlushMode.valueOf(kuduParameters.getFlushMode())); + } + if (kuduParameters.getFlushInterval() != null) { + session.setFlushInterval(kuduParameters.getFlushInterval()); + } + + LOG.info("Kudu store was successfully initialized"); + if (!schemaExists()) { + createSchema(); + } else { + table = client.openTable(kuduMapping.getTableName()); + } + } catch (Exception ex) { + throw new GoraException(ex); + } + } + + @Override + public String getSchemaName() { + return kuduMapping.getTableName(); + } + + @Override + public String getSchemaName(final String mappingSchemaName, final Class<?> persistentClass) { + return super.getSchemaName(mappingSchemaName, persistentClass); + } + + @Override + public void createSchema() throws GoraException { + if (client == null) { + throw new GoraException( + "Impossible to create the schema as no connection has been initiated."); + } + if (schemaExists()) { + return; + } + try { + List<ColumnSchema> columns = new ArrayList<>(); + List<String> keys = new ArrayList<>(); + for (Column pk : kuduMapping.getPrimaryKey()) { + columns.add(new ColumnSchema.ColumnSchemaBuilder(pk.getName(), pk.getDataType().getType()).key(true).build()); + keys.add(pk.getName()); + } + for (Map.Entry<String, Column> clt : kuduMapping.getFields().entrySet()) { + Column aColumn = clt.getValue(); + ColumnSchema aColumnSch; + ColumnSchema.ColumnSchemaBuilder aBaseColumn = new ColumnSchema.ColumnSchemaBuilder(aColumn.getName(), aColumn.getDataType().getType()).nullable(true); + if (aColumn.getDataType().getType() == Type.DECIMAL) { + aColumnSch = aBaseColumn.typeAttributes(DecimalUtil.typeAttributes(aColumn.getDataType().getPrecision(), aColumn.getDataType().getScale())).build(); + } else { + aColumnSch = aBaseColumn.build(); + } + columns.add(aColumnSch); + } + org.apache.kudu.Schema sch = new org.apache.kudu.Schema(columns); + CreateTableOptions cto = new CreateTableOptions(); + cto.setNumReplicas(kuduMapping.getNumReplicas()); + if (kuduMapping.getHashBuckets() > 0) { + cto.addHashPartitions(keys, kuduMapping.getHashBuckets()); + } + if (!kuduMapping.getRangePartitions().isEmpty()) { + cto.setRangePartitionColumns(keys); + for (Map.Entry<String, String> range : kuduMapping.getRangePartitions()) { + PartialRow lowerPar = sch.newPartialRow(); + PartialRow upperPar = sch.newPartialRow(); + for (String ky : keys) { + if (!range.getKey().isEmpty()) { + lowerPar.addString(ky, range.getKey()); + } + if (!range.getValue().isEmpty()) { + upperPar.addString(ky, range.getValue()); + } + } + cto.addRangePartition(lowerPar, upperPar); + } + } + table = client.createTable(kuduMapping.getTableName(), sch, cto); + } catch (KuduException ex) { + throw new GoraException(ex); + } + } + + @Override + public void deleteSchema() throws GoraException { + try { + client.deleteTable(kuduMapping.getTableName()); + table = null; + } catch (KuduException ex) { + throw new GoraException(ex); + } + } + + @Override + public boolean schemaExists() throws GoraException { + try { + return client.tableExists(kuduMapping.getTableName()); + } catch (KuduException ex) { + throw new GoraException(ex); + } + } + + @Override + public boolean exists(K key) throws GoraException { + try { + ColumnSchema column = table.getSchema().getColumn(kuduMapping.getPrimaryKey().get(0).getName()); Review comment: +1 ---------------------------------------------------------------- This is an automated message from the Apache Git Service. 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