[GitHub] [iceberg] kbendick commented on a change in pull request #1870: Iceberg Jdbc Catalog Implementation

[GitBox <gi...@apache.org>]

kbendick commented on a change in pull request #1870:
URL: https://github.com/apache/iceberg/pull/1870#discussion_r632036694



##########
File path: core/src/main/java/org/apache/iceberg/jdbc/JdbcCatalog.java
##########
@@ -0,0 +1,394 @@
+/*
+ * 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.jdbc;
+
+import java.io.Closeable;
+import java.sql.DatabaseMetaData;
+import java.sql.PreparedStatement;
+import java.sql.ResultSet;
+import java.sql.SQLException;
+import java.sql.SQLIntegrityConstraintViolationException;
+import java.sql.SQLNonTransientConnectionException;
+import java.sql.SQLTimeoutException;
+import java.sql.SQLTransientConnectionException;
+import java.util.Arrays;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+import java.util.stream.Collectors;
+import org.apache.hadoop.conf.Configurable;
+import org.apache.hadoop.conf.Configuration;
+import org.apache.iceberg.BaseMetastoreCatalog;
+import org.apache.iceberg.CatalogProperties;
+import org.apache.iceberg.CatalogUtil;
+import org.apache.iceberg.TableMetadata;
+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.AlreadyExistsException;
+import org.apache.iceberg.exceptions.NamespaceNotEmptyException;
+import org.apache.iceberg.exceptions.NoSuchNamespaceException;
+import org.apache.iceberg.exceptions.NoSuchTableException;
+import org.apache.iceberg.hadoop.HadoopFileIO;
+import org.apache.iceberg.io.FileIO;
+import org.apache.iceberg.relocated.com.google.common.base.Joiner;
+import org.apache.iceberg.relocated.com.google.common.base.Preconditions;
+import org.apache.iceberg.relocated.com.google.common.collect.ImmutableMap;
+import org.apache.iceberg.relocated.com.google.common.collect.Lists;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public class JdbcCatalog extends BaseMetastoreCatalog implements Configurable, SupportsNamespaces, Closeable {
+
+  public static final String PROPERTY_PREFIX = "connection.parameter.";
+  private static final Logger LOG = LoggerFactory.getLogger(JdbcCatalog.class);
+  private static final Joiner SLASH = Joiner.on("/");
+
+  private FileIO io;
+  private String catalogName = "jdbc";
+  private String warehouseLocation;
+  private Configuration conf;
+  private JdbcClientPool connections;
+
+  public JdbcCatalog() {
+  }
+
+  @Override
+  public void initialize(String name, Map<String, String> properties) {
+    String uri = properties.get(CatalogProperties.URI);
+    Preconditions.checkNotNull(uri, "JDBC connection URI is required");
+
+    String warehouse = properties.get(CatalogProperties.WAREHOUSE_LOCATION);
+    Preconditions.checkNotNull(warehouse, "JDBC warehouse location is required");
+    this.warehouseLocation = warehouse.replaceAll("/$", "");
+
+    if (name != null) {
+      this.catalogName = name;
+    }
+
+    String fileIOImpl = properties.get(CatalogProperties.FILE_IO_IMPL);
+    this.io = fileIOImpl == null ?
+        new HadoopFileIO(conf) :
+        CatalogUtil.loadFileIO(fileIOImpl, properties, conf);
+
+    try {
+      LOG.debug("Connecting to Jdbc database {}", properties.get(CatalogProperties.URI));
+      connections = new JdbcClientPool(uri, properties);
+      initializeCatalogTables();
+    } catch (SQLTimeoutException e) {
+      throw new UncheckedSQLException("Database Connection timeout", e);
+    } catch (SQLTransientConnectionException | SQLNonTransientConnectionException e) {
+      throw new UncheckedSQLException("Database Connection failed", e);
+    } catch (SQLException e) {
+      throw new UncheckedSQLException("Failed to initialize catalog", e);
+    } catch (InterruptedException e) {
+      Thread.currentThread().interrupt();
+      throw new RuntimeException("Interrupted in call to initialize", e);
+    }
+  }
+
+  private void initializeCatalogTables() throws InterruptedException, SQLException {
+    LOG.trace("Creating tables(if missing) to store iceberg catalog");

Review comment:
       Nit: Missing space before opening parens of `(if missing)`.




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