private static InetAddress getLocalAddress0()

in common/src/main/java/org/apache/seata/common/util/NetUtil.java [236:287]
51 lines of code
16 McCabe index (conditional complexity)

    private static InetAddress getLocalAddress0(String... preferredNetworks) {
        InetAddress localAddress = null;
        try {
            Enumeration<NetworkInterface> interfaces = NetworkInterface.getNetworkInterfaces();
            if (interfaces != null) {
                while (interfaces.hasMoreElements()) {
                    try {
                        NetworkInterface network = interfaces.nextElement();
                        if (network.isUp()) {
                            Enumeration<InetAddress> addresses = network.getInetAddresses();
                            while (addresses.hasMoreElements()) {
                                try {
                                    InetAddress address = addresses.nextElement();
                                    if (isValidAddress(address)) {
                                        if (null == localAddress) {
                                            localAddress = address;
                                        }
                                        //check preferredNetworks
                                        if (preferredNetworks.length > 0) {
                                            String ip = address.getHostAddress();
                                            for (String regex : preferredNetworks) {
                                                if (StringUtils.isBlank(regex)) {
                                                    continue;
                                                }
                                                if (ip.matches(regex) || ip.startsWith(regex)) {
                                                    return address;
                                                }
                                            }
                                        } else {
                                            return address;
                                        }
                                    }
                                } catch (Throwable e) {
                                    LOGGER.warn("Failed to retrieving ip address, {}", e.getMessage(), e);
                                }
                            }
                        }
                    } catch (Throwable e) {
                        LOGGER.warn("Failed to retrieving ip address, {}", e.getMessage(), e);
                    }
                }
            }
        } catch (Throwable e) {
            LOGGER.warn("Failed to retrieving ip address, {}", e.getMessage(), e);
        }
        if (localAddress == null) {
            LOGGER.error("Could not get local host ip address, will use 127.0.0.1 instead.");
        } else {
            LOGGER.error("Could not match ip by preferredNetworks:{}, will use default first ip {} instead.", Arrays.toString(preferredNetworks), localAddress.getHostAddress());
        }
        return localAddress;
    }