public class LockManager {
private static final String ALIAS = FenixFramework.<JvstmOJBConfig>getConfig().getDbAlias();
@SuppressWarnings("resource")
public static boolean acquireDistributedLock(String lockName) {
try {
Connection connection = ConnectionManager.getCurrentSQLConnection();
Statement statement = connection.createStatement();
ResultSet resultSet =
statement.executeQuery("SELECT GET_LOCK('" + lockName + ALIAS + "', 10)");
boolean result = resultSet.next() && (resultSet.getInt(1) == 1);
resultSet.close();
statement.close();
return result;
} catch (SQLException e) {
throw new Error(e);
}
}
@SuppressWarnings("resource")
public static void releaseDistributedLock(String lockName) {
try {
Connection connection = ConnectionManager.getCurrentSQLConnection();
Statement statement = connection.createStatement();
statement.executeUpdate("DO RELEASE_LOCK('" + lockName + ALIAS + "')");
statement.close();
} catch (SQLException e) {
throw new Error(e);
}
}
}
private void removeFromDeleted(DomainObject obj) {
if (objsToDelete != null) {
if (objsToDelete.remove(obj)) {
if (FenixFramework.getConfig().isErrorIfChangingDeletedObject()) {
throw new Error("Changing object after it was deleted: " + obj);
} else {
System.err.println("WARNING: Changing object after it was deleted: " + obj);
}
}
}
}