dennishuo commented on code in PR #6428: URL: https://github.com/apache/iceberg/pull/6428#discussion_r1051262362
########## snowflake/src/main/java/org/apache/iceberg/snowflake/SnowflakeCatalog.java: ########## @@ -0,0 +1,220 @@ +/* + * 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.iceberg.snowflake; + +import java.io.Closeable; +import java.util.List; +import java.util.Map; +import java.util.Set; +import java.util.stream.Collectors; +import org.apache.iceberg.BaseMetastoreCatalog; +import org.apache.iceberg.CatalogProperties; +import org.apache.iceberg.CatalogUtil; +import org.apache.iceberg.TableOperations; +import org.apache.iceberg.catalog.Namespace; +import org.apache.iceberg.catalog.SupportsNamespaces; +import org.apache.iceberg.catalog.TableIdentifier; +import org.apache.iceberg.exceptions.NoSuchNamespaceException; +import org.apache.iceberg.hadoop.Configurable; +import org.apache.iceberg.io.FileIO; +import org.apache.iceberg.jdbc.JdbcClientPool; +import org.apache.iceberg.relocated.com.google.common.annotations.VisibleForTesting; +import org.apache.iceberg.relocated.com.google.common.base.Preconditions; +import org.apache.iceberg.relocated.com.google.common.collect.Maps; +import org.apache.iceberg.snowflake.entities.SnowflakeSchema; +import org.apache.iceberg.snowflake.entities.SnowflakeTable; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +public class SnowflakeCatalog extends BaseMetastoreCatalog + implements Closeable, SupportsNamespaces, Configurable<Object> { + + private static final Logger LOG = LoggerFactory.getLogger(SnowflakeCatalog.class); + + private Object conf; + private String catalogName = SnowflakeResources.DEFAULT_CATALOG_NAME; + private Map<String, String> catalogProperties = null; + private FileIO fileIO; + private SnowflakeClient snowflakeClient; + + public SnowflakeCatalog() {} + + @VisibleForTesting + void setSnowflakeClient(SnowflakeClient snowflakeClient) { + this.snowflakeClient = snowflakeClient; + } + + @VisibleForTesting + void setFileIO(FileIO fileIO) { + this.fileIO = fileIO; + } + + @Override + public List<TableIdentifier> listTables(Namespace namespace) { + LOG.debug("listTables with namespace: {}", namespace); + Preconditions.checkArgument( + namespace.length() <= SnowflakeResources.MAX_NAMESPACE_DEPTH, + "Snowflake doesn't support more than %s levels of namespace, got %s", + SnowflakeResources.MAX_NAMESPACE_DEPTH, + namespace); + + List<SnowflakeTable> sfTables = snowflakeClient.listIcebergTables(namespace); + + return sfTables.stream() + .map( + table -> + TableIdentifier.of(table.getDatabase(), table.getSchemaName(), table.getName())) + .collect(Collectors.toList()); + } + + @Override + public boolean dropTable(TableIdentifier identifier, boolean purge) { + throw new UnsupportedOperationException( + String.format("dropTable not supported; attempted for table '%s'", identifier)); + } + + @Override + public void renameTable(TableIdentifier from, TableIdentifier to) { + throw new UnsupportedOperationException( + String.format("renameTable not supported; attempted from '%s' to '%s'", from, to)); + } + + @Override + public void initialize(String name, Map<String, String> properties) { + catalogProperties = properties; + + if (name != null) { + this.catalogName = name; + } + + if (snowflakeClient == null) { + String uri = properties.get(CatalogProperties.URI); + Preconditions.checkNotNull(uri, "JDBC connection URI is required"); + + try { + // We'll ensure the expected JDBC driver implementation class is initialized through + // reflection + // regardless of which classloader ends up using this JdbcSnowflakeClient, but we'll only + // warn if the expected driver fails to load, since users may use repackaged or custom + // JDBC drivers for Snowflake communcation. + Class.forName(JdbcSnowflakeClient.EXPECTED_JDBC_IMPL); + } catch (ClassNotFoundException cnfe) { + LOG.warn( + "Failed to load expected JDBC SnowflakeDriver - if queries fail by failing" + + " to find a suitable driver for jdbc:snowflake:// URIs, you must add the Snowflake " + + " JDBC driver to your jars/packages", + cnfe); + } + + JdbcClientPool connectionPool = new JdbcClientPool(uri, properties); + snowflakeClient = new JdbcSnowflakeClient(connectionPool); + } + + if (fileIO == null) { + String fileIOImpl = SnowflakeResources.DEFAULT_FILE_IO_IMPL; + + if (catalogProperties.containsKey(CatalogProperties.FILE_IO_IMPL)) { + fileIOImpl = catalogProperties.get(CatalogProperties.FILE_IO_IMPL); + } + + fileIO = CatalogUtil.loadFileIO(fileIOImpl, catalogProperties, conf); + } + } + + @Override + public void close() { + snowflakeClient.close(); + } + + @Override + public void createNamespace(Namespace namespace, Map<String, String> metadata) { + throw new UnsupportedOperationException( + String.format("createNamespace not supported; attempted for namespace '%s'", namespace)); + } + + @Override + public List<Namespace> listNamespaces(Namespace namespace) { + LOG.debug("listNamespaces with namespace: {}", namespace); + Preconditions.checkArgument( + namespace.length() <= SnowflakeResources.MAX_NAMESPACE_DEPTH - 1, + "Snowflake doesn't support more than %s levels of namespace, tried to list under %s", + SnowflakeResources.MAX_NAMESPACE_DEPTH, + namespace); + List<SnowflakeSchema> sfSchemas = snowflakeClient.listSchemas(namespace); + + List<Namespace> namespaceList = + sfSchemas.stream() + .map(schema -> Namespace.of(schema.getDatabase(), schema.getName())) + .collect(Collectors.toList()); + return namespaceList; + } + + @Override + public Map<String, String> loadNamespaceMetadata(Namespace namespace) + throws NoSuchNamespaceException { + LOG.debug("loadNamespaceMetadata with namespace: {}", namespace); + Map<String, String> nameSpaceMetadata = Maps.newHashMap(); + nameSpaceMetadata.put("name", namespace.toString()); Review Comment: Done -- This is an automated message from the Apache Git Service. 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