public class SalaryServiceImpl {
    private static Boolean eusEnabled = null;
    private static final Object initEusLock = new Object();

    public SalaryServiceImpl() {
        synchronized(initEusLock) {
            if(eusEnabled == null) {
                try {
                    eusEnabled = queryEusEnabled();
                } catch (Exception e) {
                    _logger.severe("Unable to query eusEnabled. EUS will be disabled.", e);
                    eusEnabled = false;
                }
                _logger.info("initializing with EUS {0}", (eusEnabled ? "enabled" : "disabled")});
            }
        }
    }
}