franta-hg@26: /**
franta-hg@26:  * SQL-DK
franta-hg@26:  * Copyright © 2013 František Kučera (frantovo.cz)
franta-hg@26:  *
franta-hg@26:  * This program is free software: you can redistribute it and/or modify
franta-hg@26:  * it under the terms of the GNU General Public License as published by
franta-hg@26:  * the Free Software Foundation, either version 3 of the License, or
franta-hg@26:  * (at your option) any later version.
franta-hg@26:  *
franta-hg@26:  * This program is distributed in the hope that it will be useful,
franta-hg@26:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
franta-hg@26:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
franta-hg@26:  * GNU General Public License for more details.
franta-hg@26:  *
franta-hg@26:  * You should have received a copy of the GNU General Public License
franta-hg@26:  * along with this program. If not, see <http://www.gnu.org/licenses/>.
franta-hg@26:  */
franta-hg@27: package info.globalcode.sql.dk;
franta-hg@27: 
franta-hg@29: import info.globalcode.sql.dk.batch.Batch;
franta-hg@146: import info.globalcode.sql.dk.batch.BatchException;
franta-hg@27: import info.globalcode.sql.dk.configuration.DatabaseDefinition;
franta-hg@106: import info.globalcode.sql.dk.configuration.Properties;
franta-hg@107: import info.globalcode.sql.dk.configuration.Property;
franta-hg@34: import info.globalcode.sql.dk.formatting.ColumnsHeader;
franta-hg@29: import info.globalcode.sql.dk.formatting.Formatter;
franta-hg@28: import java.sql.Connection;
franta-hg@28: import java.sql.DriverManager;
franta-hg@29: import java.sql.PreparedStatement;
franta-hg@29: import java.sql.ResultSet;
franta-hg@28: import java.sql.SQLException;
franta-hg@86: import java.sql.SQLWarning;
franta-hg@55: import java.util.logging.Level;
franta-hg@55: import java.util.logging.Logger;
franta-hg@26: 
franta-hg@26: /**
franta-hg@155:  * Represents connected database. Is derived from {@linkplain DatabaseDefinition}.
franta-hg@155:  * Wraps {@linkplain Connection}.
franta-hg@155:  *
franta-hg@155:  * Is responsible for executing {@linkplain SQLCommand} and passing results to the
franta-hg@155:  * {@linkplain Formatter}.
franta-hg@26:  *
franta-hg@26:  * @author Ing. František Kučera (frantovo.cz)
franta-hg@26:  */
franta-hg@42: public class DatabaseConnection implements AutoCloseable {
franta-hg@26: 
franta-hg@55: 	private static final Logger log = Logger.getLogger(DatabaseConnection.class.getName());
franta-hg@108: 	private static final String JDBC_PROPERTY_USER = "user";
franta-hg@108: 	public static final String JDBC_PROPERTY_PASSWORD = "password";
franta-hg@26: 	private DatabaseDefinition databaseDefinition;
franta-hg@28: 	private Connection connection;
franta-hg@106: 	private Properties properties;
franta-hg@26: 
franta-hg@106: 	public DatabaseConnection(DatabaseDefinition databaseDefinition, Properties properties) throws SQLException {
franta-hg@26: 		this.databaseDefinition = databaseDefinition;
franta-hg@106: 		this.properties = properties;
franta-hg@28: 
franta-hg@108: 		if (properties.hasProperty(JDBC_PROPERTY_PASSWORD)) {
franta-hg@108: 			log.log(Level.WARNING, "Passing DB password as CLI parameter is insecure!");
franta-hg@108: 		}
franta-hg@108: 
franta-hg@107: 		Properties credentials = new Properties();
franta-hg@108: 		credentials.add(new Property(JDBC_PROPERTY_USER, databaseDefinition.getUserName()));
franta-hg@108: 		credentials.add(new Property(JDBC_PROPERTY_PASSWORD, databaseDefinition.getPassword()));
franta-hg@107: 		credentials.setDefaults(databaseDefinition.getProperties());
franta-hg@107: 		properties.setDefaults(credentials);
franta-hg@106: 		java.util.Properties javaProperties = properties.getJavaProperties();
franta-hg@106: 
franta-hg@106: 		connection = DriverManager.getConnection(databaseDefinition.getUrl(), javaProperties);
franta-hg@26: 	}
franta-hg@29: 
franta-hg@29: 	public void executeQuery(SQLCommand sqlCommand, Formatter formatter) throws SQLException {
franta-hg@91: 		formatter.writeStartBatch();
franta-hg@29: 		formatter.writeStartDatabase(databaseDefinition);
franta-hg@142: 		formatter.writeStartStatement();
franta-hg@142: 		formatter.writeQuery(sqlCommand.getQuery());
franta-hg@142: 		formatter.writeParameters(sqlCommand.getParameters());
franta-hg@29: 		processCommand(sqlCommand, formatter);
franta-hg@142: 		formatter.writeEndStatement();
franta-hg@29: 		formatter.writeEndDatabase();
franta-hg@91: 		formatter.writeEndBatch();
franta-hg@29: 	}
franta-hg@29: 
franta-hg@146: 	public void executeBatch(Batch batch, Formatter formatter) throws SQLException, BatchException {
franta-hg@91: 		formatter.writeStartBatch();
franta-hg@29: 		formatter.writeStartDatabase(databaseDefinition);
franta-hg@29: 		while (batch.hasNext()) {
franta-hg@142: 			SQLCommand sqlCommand = batch.next();
franta-hg@142: 			formatter.writeStartStatement();
franta-hg@142: 			formatter.writeQuery(sqlCommand.getQuery());
franta-hg@142: 			formatter.writeParameters(sqlCommand.getParameters());
franta-hg@142: 			processCommand(sqlCommand, formatter);
franta-hg@142: 			formatter.writeEndStatement();
franta-hg@29: 		}
franta-hg@29: 		formatter.writeEndDatabase();
franta-hg@91: 		formatter.writeEndBatch();
franta-hg@29: 	}
franta-hg@29: 
franta-hg@29: 	private void processCommand(SQLCommand sqlCommand, Formatter formatter) throws SQLException {
franta-hg@29: 		try (PreparedStatement ps = sqlCommand.prepareStatement(connection)) {
franta-hg@55: 			log.log(Level.FINE, "Statement prepared");
franta-hg@29: 			sqlCommand.parametrize(ps);
franta-hg@35: 
franta-hg@35: 			boolean isRS = ps.execute();
franta-hg@55: 			log.log(Level.FINE, "Statement executed");
franta-hg@35: 			if (isRS) {
franta-hg@35: 				try (ResultSet rs = ps.getResultSet()) {
franta-hg@142: 					processResultSet(rs, formatter);
franta-hg@35: 				}
franta-hg@35: 			} else {
franta-hg@142: 				processUpdateResult(ps, formatter);
franta-hg@35: 			}
franta-hg@86: 			logWarnings(ps);
franta-hg@35: 
franta-hg@35: 			while (ps.getMoreResults() || ps.getUpdateCount() > -1) {
franta-hg@37: 				ResultSet rs = ps.getResultSet();
franta-hg@37: 				if (rs == null) {
franta-hg@142: 					processUpdateResult(ps, formatter);
franta-hg@37: 				} else {
franta-hg@142: 					processResultSet(rs, formatter);
franta-hg@37: 					rs.close();
franta-hg@37: 				}
franta-hg@86: 				logWarnings(ps);
franta-hg@29: 			}
franta-hg@29: 		}
franta-hg@37: 	}
franta-hg@37: 
franta-hg@142: 	private void processUpdateResult(PreparedStatement ps, Formatter formatter) throws SQLException {
franta-hg@142: 		formatter.writeUpdatesResult(ps.getUpdateCount());
franta-hg@37: 	}
franta-hg@37: 
franta-hg@142: 	private void processResultSet(ResultSet rs, Formatter formatter) throws SQLException {
franta-hg@142: 		formatter.writeStartResultSet(new ColumnsHeader(rs.getMetaData()));
franta-hg@37: 
franta-hg@34: 		int columnCount = rs.getMetaData().getColumnCount();
franta-hg@34: 
franta-hg@29: 		while (rs.next()) {
franta-hg@29: 			formatter.writeStartRow();
franta-hg@29: 
franta-hg@34: 			for (int i = 1; i <= columnCount; i++) {
franta-hg@34: 				formatter.writeColumnValue(rs.getObject(i));
franta-hg@34: 			}
franta-hg@34: 
franta-hg@29: 			formatter.writeEndRow();
franta-hg@29: 		}
franta-hg@34: 
franta-hg@142: 		formatter.writeEndResultSet();
franta-hg@29: 	}
franta-hg@42: 
franta-hg@86: 	private void logWarnings(PreparedStatement ps) throws SQLException {
franta-hg@86: 		SQLWarning w = ps.getWarnings();
franta-hg@86: 		while (w != null) {
franta-hg@86: 			log.log(Level.WARNING, "SQL: {0}", w.getLocalizedMessage());
franta-hg@86: 			w = w.getNextWarning();
franta-hg@86: 		}
franta-hg@86: 		ps.clearWarnings();
franta-hg@86: 	}
franta-hg@86: 
franta-hg@65: 	/**
franta-hg@65: 	 * Tests if this connection is live.
franta-hg@65: 	 *
franta-hg@65: 	 * @return true if test was successful
franta-hg@65: 	 * @throws SQLException if test fails
franta-hg@65: 	 */
franta-hg@65: 	public boolean test() throws SQLException {
franta-hg@65: 		connection.getAutoCommit();
franta-hg@65: 		return true;
franta-hg@65: 	}
franta-hg@65: 
franta-hg@42: 	@Override
franta-hg@42: 	public void close() throws SQLException {
franta-hg@42: 		connection.close();
franta-hg@42: 	}
franta-hg@26: }