UnixTestUtils Class — netty Architecture

Source Code

transport-native-unix-common-tests/src/main/java/io/netty/channel/unix/tests/UnixTestUtils.java lines 30–83

public final class UnixTestUtils {
    private static final Object INET_LOOPBACK_UNAVAILABLE = new Object();
    private static volatile Object inetLoopbackCache;

    /**
     * @deprecated Use {@link #newDomainSocketAddress()} instead.
     */
    @Deprecated
    public static DomainSocketAddress newSocketAddress() {
        return newDomainSocketAddress();
    }

    public static DomainSocketAddress newDomainSocketAddress() {
        try {
            File file;
            do {
                file = PlatformDependent.createTempFile("NETTY", "UDS", null);
                if (!file.delete()) {
                    throw new IOException("failed to delete: " + file);
                }
            } while (file.getAbsolutePath().length() > 128);
            return new DomainSocketAddress(file);
        } catch (IOException e) {
            throw new IllegalStateException(e);
        }
    }

    /**
     * The JDK method may produce IPv4 loopback addresses where {@link io.netty.util.NetUtil#LOCALHOST} might be an
     * IPv6 addresses.
     * This difference can stress the system in different ways that are important to test.
     */
    public static SocketAddress newInetLoopbackSocketAddress() {
        Object loopback = inetLoopbackCache;

        if (loopback == null) {
            inetLoopbackCache = loopback = getLoopbackAddress();
        }

        assumeTrue(loopback != INET_LOOPBACK_UNAVAILABLE, "InetAddress.getLoopbackAddress() is not available");
        return new InetSocketAddress((InetAddress) loopback, 0);
    }

    private static Object getLoopbackAddress() {
        try {
            Method method = InetAddress.class.getMethod("getLoopbackAddress");
            return method.invoke(null);
        } catch (Exception ignore) {
            return INET_LOOPBACK_UNAVAILABLE;
        }
    }

    private UnixTestUtils() { }
}