private PriceSignal getPriceSignalData() {
Statement statement = null;
String query = null;
ResultSet resultSet = null;
PriceSignal pricesignal = new PriceSignal(commodity);
// round time to last full hour
Calendar cal = Calendar.getInstance();
cal.set(Calendar.MILLISECOND, 0);
cal.set(Calendar.SECOND, 0);
cal.set(Calendar.MINUTE, 0);
long startTimeForSPS = cal.getTimeInMillis() / 1000L;
long endTimeForSPS = startTimeForSPS + 36 * 3600; // get the sps for the next 36h!
try {
Connection connection = database.getConnection();
statement = connection.createStatement();
} catch (SQLException e) {
globalLogger.logError("SQL connection error", e);
database.closeConnection();
return null;
}
try {
query =
"SELECT * FROM sps WHERE timestamp >= "
+ startTimeForSPS
+ " AND timestamp < "
+ endTimeForSPS;
statement.execute(query);
resultSet = statement.getResultSet();
while (resultSet.next()) {
Integer timeStamp = Integer.valueOf(resultSet.getInt("timestamp"));
Double price = Double.parseDouble(Integer.toString(resultSet.getInt("price")));
pricesignal.setPrice(timeStamp, price);
}
pricesignal.setKnownPriceInterval(startTimeForSPS, endTimeForSPS);
statement.close();
} catch (SQLException ex) {
if (statement != null) {
try {
statement.close();
} catch (SQLException e) {
// ignore
}
}
globalLogger.logError("getting DofData failed!", ex);
database.closeConnection();
}
return pricesignal;
}
public void setUpSQLConnection(
String dbHost, String dbPort, String dbName, String dbUser, String dbPasswd)
throws ClassNotFoundException {
database = new MySqlConnectionHandler(dbHost, dbPort, dbName, dbUser, dbPasswd);
globalLogger.logDebug("* establishing SQL connection for priceSignal driver...");
try {
database.connect();
globalLogger.logDebug("* ...SQL connection for priceSignal driver OK");
} catch (SQLException e) {
globalLogger.logError("* ...SQL connection for priceSignal driver FAILED", e);
}
}
/* (non-Javadoc)
* @see java.lang.Thread#run()
*/
@Override
public void run() {
try {
while (true) {
PriceSignal price = getPriceSignalData();
PowerLimitSignal limit = getPowerLimitSignalData();
if (price != null) priceSignalProvider.processPriceSignal(price, limit);
try {
sleep(120000); // 120 sec.
} catch (InterruptedException e) {
globalLogger.logError(e);
}
}
} catch (Exception e) {
globalLogger.logError(e);
}
}
private PowerLimitSignal getPowerLimitSignalData() {
Statement statement = null;
String query = null;
ResultSet resultSet = null;
PowerLimitSignal powerlimit = new PowerLimitSignal();
// round time to last full hour
Calendar cal = Calendar.getInstance();
cal.set(Calendar.MILLISECOND, 0);
cal.set(Calendar.SECOND, 0);
cal.set(Calendar.MINUTE, 0);
long startTimeForEPS = cal.getTimeInMillis() / 1000L;
long endTimeForEPS = startTimeForEPS + 36 * 3600; // get the eps for the next 24h!
Connection connection;
try {
connection = database.getConnection();
statement = connection.createStatement();
} catch (SQLException e) {
globalLogger.logError("SQL connection error", e);
database.closeConnection();
return null;
}
try {
// last load signal
query =
"SELECT * FROM lbs WHERE timestamp <= "
+ startTimeForEPS
+ " ORDER BY timestamp DESC LIMIT 1";
statement.execute(query);
resultSet = statement.getResultSet();
while (resultSet.next()) {
long timeStamp = resultSet.getInt("timestamp");
Double limit = Double.parseDouble(Integer.toString(resultSet.getInt("price")));
powerlimit.setPowerLimit(timeStamp, limit);
}
statement.close();
statement = connection.createStatement();
// future load signals
query =
"SELECT * FROM lbs WHERE timestamp > "
+ startTimeForEPS
+ " AND timestamp < "
+ endTimeForEPS;
statement.execute(query);
resultSet = statement.getResultSet();
while (resultSet.next()) {
Integer timeStamp = Integer.valueOf(resultSet.getInt("timestamp"));
Double limit = Double.parseDouble(Integer.toString(resultSet.getInt("price")));
powerlimit.setPowerLimit(timeStamp, limit);
}
powerlimit.setKnownPowerLimitInterval(startTimeForEPS, endTimeForEPS);
statement.close();
} catch (SQLException ex) {
if (statement != null) {
try {
statement.close();
} catch (SQLException e) {
// ignore
}
}
globalLogger.logError("getting PowerLimitData failed!", ex);
database.closeConnection();
}
return powerlimit;
}