3 * Copyright © 2013 František Kučera (frantovo.cz)
5 * This program is free software: you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation, either version 3 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program. If not, see <http://www.gnu.org/licenses/>.
18 package info.globalcode.sql.dk;
20 import info.globalcode.sql.dk.batch.Batch;
21 import info.globalcode.sql.dk.configuration.DatabaseDefinition;
22 import info.globalcode.sql.dk.formatting.ColumnsHeader;
23 import info.globalcode.sql.dk.formatting.Formatter;
24 import java.sql.Connection;
25 import java.sql.DriverManager;
26 import java.sql.PreparedStatement;
27 import java.sql.ResultSet;
28 import java.sql.SQLException;
29 import java.sql.SQLWarning;
30 import java.util.logging.Level;
31 import java.util.logging.Logger;
35 * @author Ing. František Kučera (frantovo.cz)
37 public class DatabaseConnection implements AutoCloseable {
39 private static final Logger log = Logger.getLogger(DatabaseConnection.class.getName());
40 private DatabaseDefinition databaseDefinition;
41 private Connection connection;
43 public DatabaseConnection(DatabaseDefinition databaseDefinition) throws SQLException {
44 this.databaseDefinition = databaseDefinition;
46 connection = DriverManager.getConnection(databaseDefinition.getUrl(), databaseDefinition.getUserName(), databaseDefinition.getPassword());
49 public void executeQuery(SQLCommand sqlCommand, Formatter formatter) throws SQLException {
50 formatter.writeStartDatabase(databaseDefinition);
51 processCommand(sqlCommand, formatter);
52 formatter.writeEndDatabase();
55 public void executeBatch(Batch batch, Formatter formatter) throws SQLException {
56 formatter.writeStartDatabase(databaseDefinition);
57 while (batch.hasNext()) {
58 processCommand(batch.next(), formatter);
60 formatter.writeEndDatabase();
63 private void processCommand(SQLCommand sqlCommand, Formatter formatter) throws SQLException {
64 try (PreparedStatement ps = sqlCommand.prepareStatement(connection)) {
65 log.log(Level.FINE, "Statement prepared");
66 sqlCommand.parametrize(ps);
68 boolean isRS = ps.execute();
69 log.log(Level.FINE, "Statement executed");
71 try (ResultSet rs = ps.getResultSet()) {
72 processResultSet(sqlCommand, rs, formatter);
75 processUpdateResult(sqlCommand, ps, formatter);
79 while (ps.getMoreResults() || ps.getUpdateCount() > -1) {
80 ResultSet rs = ps.getResultSet();
82 processUpdateResult(sqlCommand, ps, formatter);
84 processResultSet(sqlCommand, rs, formatter);
92 private void processUpdateResult(SQLCommand sqlCommand, PreparedStatement ps, Formatter formatter) throws SQLException {
93 formatter.writeStartUpdatesResult();
94 formatter.writeQuery(sqlCommand.getQuery());
95 formatter.writeParameters(sqlCommand.getParameters());
96 formatter.writeUpdatedRowsCount(ps.getUpdateCount());
97 formatter.writeEndUpdatesResult();
100 private void processResultSet(SQLCommand sqlCommand, ResultSet rs, Formatter formatter) throws SQLException {
101 formatter.writeStartResultSet();
102 formatter.writeQuery(sqlCommand.getQuery());
103 formatter.writeParameters(sqlCommand.getParameters());
105 processResultSetRows(rs, formatter);
107 formatter.writeEndResultSet();
110 private void processResultSetRows(ResultSet rs, Formatter formatter) throws SQLException {
111 formatter.writeColumnsHeader(new ColumnsHeader(rs.getMetaData()));
112 int columnCount = rs.getMetaData().getColumnCount();
115 formatter.writeStartRow();
117 for (int i = 1; i <= columnCount; i++) {
118 formatter.writeColumnValue(rs.getObject(i));
121 formatter.writeEndRow();
126 private void logWarnings(PreparedStatement ps) throws SQLException {
127 SQLWarning w = ps.getWarnings();
129 log.log(Level.WARNING, "SQL: {0}", w.getLocalizedMessage());
130 w = w.getNextWarning();
136 * Tests if this connection is live.
138 * @return true if test was successful
139 * @throws SQLException if test fails
141 public boolean test() throws SQLException {
142 connection.getAutoCommit();
147 public void close() throws SQLException {