1 package org.cacert.gigi.database;
3 import java.io.FileInputStream;
4 import java.io.IOException;
5 import java.sql.Connection;
6 import java.sql.DriverManager;
7 import java.sql.PreparedStatement;
8 import java.sql.ResultSet;
9 import java.sql.SQLException;
10 import java.util.HashMap;
11 import java.util.Properties;
13 public class DatabaseConnection {
15 HashMap<String, PreparedStatement> statements = new HashMap<String, PreparedStatement>();
16 static Properties credentials = new Properties();
19 credentials.load(new FileInputStream("config/sql.properties"));
20 } catch (IOException e) {
24 public DatabaseConnection() {
26 Class.forName(credentials.getProperty("driver"));
27 } catch (ClassNotFoundException e) {
31 c = DriverManager.getConnection(credentials.getProperty("url"),
32 credentials.getProperty("user"),
33 credentials.getProperty("password"));
34 } catch (SQLException e) {
39 public PreparedStatement prepare(String query) throws SQLException {
40 PreparedStatement statement = statements.get(query);
41 if (statement == null) {
42 statement = c.prepareStatement(query);
43 statements.put(query, statement);
48 public static int lastInsertId(PreparedStatement query) throws SQLException {
49 ResultSet rs = query.getGeneratedKeys();
51 int id = rs.getInt(1);
55 static ThreadLocal<DatabaseConnection> instances = new ThreadLocal<DatabaseConnection>() {
57 protected DatabaseConnection initialValue() {
58 return new DatabaseConnection();
61 public static DatabaseConnection getInstance() {
62 return instances.get();