int () { String property = System.getProperty(DISPATCH_PORT_SYS_PROP); try { if (property == null || property.trim().isEmpty()) { throw new IllegalStateException("System property '" + DISPATCH_PORT_SYS_PROP + "' is not set"); } return Integer.parseInt(property); } catch (NumberFormatException e) { throw new IllegalStateException("System property '" + DISPATCH_PORT_SYS_PROP + "' has invalid value: " + property, e); } }