private synchronized void init() throws SQLException {
if (isClosed) return;
// do tables exists?
Statement stmt = conn.createStatement();
ResultSet rs = stmt.executeQuery(TABLE_NAMES_SELECT_STMT);
ArrayList<String> missingTables = new ArrayList(TABLES.keySet());
while (rs.next()) {
String tableName = rs.getString("name");
missingTables.remove(tableName);
}
for (String missingTable : missingTables) {
try {
Statement createStmt = conn.createStatement();
// System.out.println("Adding table "+ missingTable);
createStmt.executeUpdate(TABLES.get(missingTable));
createStmt.close();
} catch (Exception e) {
System.err.println(e.getClass().getName() + ": " + e.getMessage());
}
}
}
public synchronized void close() {
if (isClosed) return;
try {
if (conn != null) conn.close();
isClosed = true;
} catch (Exception e) {
e.printStackTrace();
}
}