| /* |
| * 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.knox.gateway.shell.table; |
| |
| import java.io.IOException; |
| import java.sql.Connection; |
| import java.sql.DriverManager; |
| import java.sql.ResultSet; |
| import java.sql.ResultSetMetaData; |
| import java.sql.SQLException; |
| import java.sql.Statement; |
| import java.util.Locale; |
| |
| public class JDBCKnoxShellTableBuilder extends KnoxShellTableBuilder { |
| |
| private String connectionUrl; |
| private String driver; |
| private Connection conn; |
| private boolean tableManagedConnection = true; |
| private String username; |
| private String pass; |
| |
| public JDBCKnoxShellTableBuilder username(String username) { |
| this.username = username; |
| return this; |
| } |
| |
| public String username() { |
| return username; |
| } |
| |
| public JDBCKnoxShellTableBuilder pwd(String pass) { |
| this.pass = pass; |
| return this; |
| } |
| |
| public String password() { |
| return pass; |
| } |
| |
| JDBCKnoxShellTableBuilder(KnoxShellTable table) { |
| super(table); |
| } |
| |
| @Override |
| public JDBCKnoxShellTableBuilder title(String title) { |
| this.title = title; |
| return this; |
| } |
| |
| public JDBCKnoxShellTableBuilder connectTo(String connectionUrl) { |
| this.connectionUrl = connectionUrl; |
| return this; |
| } |
| |
| public JDBCKnoxShellTableBuilder driver(String driver) throws Exception { |
| this.driver = driver; |
| loadDriver(); |
| return this; |
| } |
| |
| private void loadDriver() throws Exception { |
| try { |
| Class.forName(driver).newInstance(); |
| } catch (ClassNotFoundException e) { |
| System.out.println(String.format(Locale.US, "Unable to load the JDBC driver %s. Check your CLASSPATH.", driver)); |
| throw e; |
| } catch (InstantiationException e) { |
| System.out.println(String.format(Locale.US, "Unable to instantiate the JDBC driver %s", driver)); |
| throw e; |
| } catch (IllegalAccessException e) { |
| System.out.println(String.format(Locale.US, "Not allowed to access the JDBC driver %s", driver)); |
| throw e; |
| } |
| } |
| |
| public JDBCKnoxShellTableBuilder connection(Connection connection) { |
| this.conn = connection; |
| this.tableManagedConnection = false; |
| return this; |
| } |
| |
| public KnoxShellTable sql(String sql) throws IOException, SQLException { |
| conn = conn == null ? createConnection() : conn; |
| try (Statement statement = conn.createStatement(); ResultSet resultSet = statement.executeQuery(sql);) { |
| processResultSet(resultSet); |
| } finally { |
| if (conn != null && tableManagedConnection) { |
| conn.close(); |
| } |
| } |
| return this.table; |
| } |
| |
| public Connection createConnection() throws SQLException { |
| Connection con = null; |
| if (username != null && pass != null) { |
| con = DriverManager.getConnection(connectionUrl, username, pass); |
| } |
| else { |
| con = DriverManager.getConnection(connectionUrl); |
| } |
| return con; |
| } |
| |
| // added this as a private method so that KnoxShellTableHistoryAspect will not |
| // intercept this call |
| private void processResultSet(ResultSet resultSet) throws SQLException { |
| final ResultSetMetaData metadata = resultSet.getMetaData(); |
| final int colCount = metadata.getColumnCount(); |
| try { |
| table.title(metadata.getTableName(1)); |
| } |
| catch (SQLException e) { |
| // nop. Apache HiveDriver doesn't support this. |
| } |
| for (int i = 1; i < colCount + 1; i++) { |
| this.table.header(metadata.getColumnName(i)); |
| } |
| while (resultSet.next()) { |
| table.row(); |
| for (int i = 1; i < colCount + 1; i++) { |
| try { |
| table.value(resultSet.getObject(metadata.getColumnName(i), Comparable.class)); |
| } |
| catch (SQLException e) { |
| table.value(resultSet.getString(metadata.getColumnName(i))); |
| } |
| } |
| } |
| } |
| |
| public KnoxShellTable resultSet(ResultSet resultSet) throws SQLException { |
| processResultSet(resultSet); |
| return this.table; |
| } |
| } |