SteNicholas commented on code in PR #49: URL: https://github.com/apache/rocketmq-flink/pull/49#discussion_r952093854
########## src/main/java/org/apache/rocketmq/flink/catalog/RocketMQCatalog.java: ########## @@ -0,0 +1,493 @@ +/* + * 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.rocketmq.flink.catalog; + +import org.apache.rocketmq.client.exception.MQBrokerException; +import org.apache.rocketmq.client.exception.MQClientException; +import org.apache.rocketmq.common.admin.TopicStatsTable; +import org.apache.rocketmq.flink.common.constant.RocketMqCatalogConstant; +import org.apache.rocketmq.remoting.exception.RemotingException; +import org.apache.rocketmq.remoting.protocol.LanguageCode; +import org.apache.rocketmq.schema.registry.client.SchemaRegistryClient; +import org.apache.rocketmq.schema.registry.client.SchemaRegistryClientFactory; +import org.apache.rocketmq.schema.registry.common.dto.GetSchemaResponse; +import org.apache.rocketmq.schema.registry.common.model.SchemaType; +import org.apache.rocketmq.tools.admin.DefaultMQAdminExt; + +import org.apache.flink.formats.avro.typeutils.AvroSchemaConverter; +import org.apache.flink.table.api.Schema; +import org.apache.flink.table.catalog.AbstractCatalog; +import org.apache.flink.table.catalog.CatalogBaseTable; +import org.apache.flink.table.catalog.CatalogDatabase; +import org.apache.flink.table.catalog.CatalogDatabaseImpl; +import org.apache.flink.table.catalog.CatalogFunction; +import org.apache.flink.table.catalog.CatalogPartition; +import org.apache.flink.table.catalog.CatalogPartitionImpl; +import org.apache.flink.table.catalog.CatalogPartitionSpec; +import org.apache.flink.table.catalog.CatalogTable; +import org.apache.flink.table.catalog.ObjectPath; +import org.apache.flink.table.catalog.exceptions.CatalogException; +import org.apache.flink.table.catalog.exceptions.DatabaseAlreadyExistException; +import org.apache.flink.table.catalog.exceptions.DatabaseNotEmptyException; +import org.apache.flink.table.catalog.exceptions.DatabaseNotExistException; +import org.apache.flink.table.catalog.exceptions.FunctionAlreadyExistException; +import org.apache.flink.table.catalog.exceptions.FunctionNotExistException; +import org.apache.flink.table.catalog.exceptions.PartitionAlreadyExistsException; +import org.apache.flink.table.catalog.exceptions.PartitionNotExistException; +import org.apache.flink.table.catalog.exceptions.PartitionSpecInvalidException; +import org.apache.flink.table.catalog.exceptions.TableAlreadyExistException; +import org.apache.flink.table.catalog.exceptions.TableNotExistException; +import org.apache.flink.table.catalog.exceptions.TableNotPartitionedException; +import org.apache.flink.table.catalog.stats.CatalogColumnStatistics; +import org.apache.flink.table.catalog.stats.CatalogTableStatistics; +import org.apache.flink.table.expressions.Expression; +import org.apache.flink.table.factories.Factory; +import org.apache.flink.table.types.DataType; +import org.apache.flink.table.types.FieldsDataType; +import org.apache.flink.table.types.logical.RowType; +import org.apache.flink.table.types.utils.TypeConversions; + +import org.apache.commons.lang3.StringUtils; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +import java.util.Collections; +import java.util.HashMap; +import java.util.List; +import java.util.Map; +import java.util.Objects; +import java.util.Optional; +import java.util.stream.Collectors; + +import static org.apache.flink.util.Preconditions.checkArgument; +import static org.apache.flink.util.Preconditions.checkNotNull; +import static org.apache.flink.util.StringUtils.isNullOrWhitespaceOnly; + +/** A catalog implementation for RocketMQ. */ +public class RocketMQCatalog extends AbstractCatalog { + + private static final Logger LOG = LoggerFactory.getLogger(RocketMQCatalog.class); + public static final String DEFAULT_DB = "default"; + public final String namesrvAddr; + private final String schemaRegistryUrl; + private DefaultMQAdminExt mqAdminExt; + private SchemaRegistryClient schemaRegistryClient; + + public RocketMQCatalog( + String catalogName, String database, String namesrvAddr, String schemaRegistryUrl) { + super(catalogName, database); + + checkArgument(!isNullOrWhitespaceOnly(namesrvAddr), "namesrvAddr cannot be null or empty"); + checkArgument( + !isNullOrWhitespaceOnly(schemaRegistryUrl), + "schemaRegistryUrl cannot be null or empty"); + + this.namesrvAddr = namesrvAddr; + this.schemaRegistryUrl = schemaRegistryUrl; + LOG.info("Created RocketMQ Catalog {}", catalogName); + } + + @Override + public Optional<Factory> getFactory() { + return Optional.of(new RocketMQCatalogFactory()); + } + + @Override + public void open() throws CatalogException { + if (mqAdminExt == null) { + try { + mqAdminExt = new DefaultMQAdminExt(); + mqAdminExt.setNamesrvAddr(namesrvAddr); + mqAdminExt.setLanguage(LanguageCode.JAVA); + mqAdminExt.start(); + } catch (MQClientException e) { + throw new CatalogException( + "Failed to create RocketMQ admin using :" + namesrvAddr, e); + } + } + if (schemaRegistryClient == null) { + schemaRegistryClient = SchemaRegistryClientFactory.newClient(schemaRegistryUrl, null); + } + } + + @Override + public void close() throws CatalogException { + if (Objects.nonNull(mqAdminExt)) { + mqAdminExt.shutdown(); + mqAdminExt = null; + } + if (Objects.nonNull(schemaRegistryClient)) { + schemaRegistryClient = null; + } + } + + @Override + public List<String> listDatabases() throws CatalogException { + return Collections.singletonList(getDefaultDatabase()); + } + + @Override + public CatalogDatabase getDatabase(String databaseName) + throws DatabaseNotExistException, CatalogException { + if (StringUtils.isEmpty(databaseName)) { + throw new CatalogException("Database name can not be null or empty."); + } + if (!databaseExists(databaseName)) { + throw new DatabaseNotExistException(getName(), databaseName); + } else { + return new CatalogDatabaseImpl(new HashMap<>(), null); + } + } + + @Override + public boolean databaseExists(String databaseName) throws CatalogException { + return getDefaultDatabase().equals(databaseName); + } + + @Override + public List<String> listTables(String databaseName) + throws DatabaseNotExistException, CatalogException { + if (!getDefaultDatabase().equals(databaseName)) { + throw new DatabaseNotExistException(getName(), databaseName); + } + try { + List<String> tables = schemaRegistryClient.getSubjectsByTenant("default", "default"); + return tables; + } catch (Exception e) { + throw new CatalogException( + String.format( + "Failed to get topics of namespace %s from schema registry client.", + databaseName), + e); + } + } + + @Override + public CatalogBaseTable getTable(ObjectPath tablePath) + throws TableNotExistException, CatalogException { + if (!tableExists(tablePath)) { + throw new TableNotExistException(getName(), tablePath); + } + String subject = tablePath.getObjectName(); + try { + GetSchemaResponse getSchemaResponse = schemaRegistryClient.getSchemaBySubject(subject); + if (getSchemaResponse.getType() != SchemaType.AVRO) { + throw new CatalogException("Only support avro schema."); + } + return getCatalogTableForSchema(subject, getSchemaResponse); + } catch (Exception e) { + throw new CatalogException( + String.format( + "Failed to get schema of table %s from schema registry client.", + tablePath.getFullName()), + e); + } + } + + private CatalogTable getCatalogTableForSchema( + String topic, GetSchemaResponse getSchemaResponse) { + DataType dataType = AvroSchemaConverter.convertToDataType(getSchemaResponse.getIdl()); + Schema.Builder builder = Schema.newBuilder(); + if (dataType instanceof FieldsDataType) { + FieldsDataType fieldsDataType = (FieldsDataType) dataType; + RowType rowType = (RowType) fieldsDataType.getLogicalType(); + for (RowType.RowField field : rowType.getFields()) { + DataType toDataType = TypeConversions.fromLogicalToDataType(field.getType()); + builder.column(field.getName(), toDataType); + } + } + Schema schema = builder.build(); + Map<String, String> options = new HashMap<>(); + options.put(RocketMqCatalogConstant.CONNECTOR, RocketMqCatalogConstant.ROCKETMQ_CONNECTOR); + options.put(RocketMqCatalogConstant.TOPIC, topic); + options.put(RocketMqCatalogConstant.NAME_SERVER_ADDRESS, mqAdminExt.getNamesrvAddr()); + return CatalogTable.of(schema, null, Collections.emptyList(), options); + } + + @Override + public boolean tableExists(ObjectPath tablePath) throws CatalogException { + if (!getDefaultDatabase().equals(tablePath.getDatabaseName())) { + throw new CatalogException("Database name is not default."); + } + if (StringUtils.isEmpty(tablePath.getObjectName())) { + return false; + } + String subject = tablePath.getObjectName(); + try { + GetSchemaResponse getSchemaResponse = schemaRegistryClient.getSchemaBySubject(subject); + if (Objects.nonNull(getSchemaResponse)) { + return true; + } + } catch (Exception e) { + throw new CatalogException( + String.format( + "Failed to get schema of table %s from schema registry client.", + tablePath.getFullName()), + e); + } + return false; + } + + @Override + public List<CatalogPartitionSpec> listPartitions(ObjectPath tablePath) + throws TableNotExistException, TableNotPartitionedException, CatalogException { + checkNotNull(tablePath, "Table path cannot be null"); + + try { + TopicStatsTable topicStatsTable = + mqAdminExt.examineTopicStats(tablePath.getObjectName()); + return topicStatsTable.getOffsetTable().keySet().stream() + .map( + topicOffset -> + new CatalogPartitionSpec( + new HashMap<String, String>(1) { + { + String queueId = + String.valueOf( + topicOffset.getQueueId()); + put("__queue_id__", queueId); + } + })) + .collect(Collectors.toList()); + } catch (RemotingException e) { + throw new RuntimeException(e); + } catch (MQClientException e) { + throw new RuntimeException(e); + } catch (InterruptedException e) { + throw new RuntimeException(e); + } catch (MQBrokerException e) { + throw new RuntimeException(e); + } + } + + @Override + public List<CatalogPartitionSpec> listPartitions( + ObjectPath tablePath, CatalogPartitionSpec partitionSpec) + throws TableNotExistException, TableNotPartitionedException, CatalogException { + return listPartitions(tablePath); + } + + @Override + public CatalogPartition getPartition(ObjectPath tablePath, CatalogPartitionSpec partitionSpec) + throws PartitionNotExistException, CatalogException { + return new CatalogPartitionImpl(partitionSpec.getPartitionSpec(), null); + } + + @Override + public boolean partitionExists(ObjectPath tablePath, CatalogPartitionSpec partitionSpec) + throws CatalogException { + try { + List<CatalogPartitionSpec> catalogPartitionSpecs = listPartitions(tablePath); + return catalogPartitionSpecs.contains(partitionSpec); + } catch (TableNotExistException e) { Review Comment: Ditto. -- This is an automated message from the Apache Git Service. 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