public Netty4IOContext()

in protonj2-client/src/main/java/org/apache/qpid/protonj2/client/transport/netty4/Netty4IOContext.java [58:109]
46 lines of code
10 McCabe index (conditional complexity)

    public Netty4IOContext(TransportOptions options, SslOptions ssl, String ioThreadName) {
        Objects.requireNonNull(options, "Transport Options cannot be null");
        Objects.requireNonNull(ssl, "Transport SSL Options cannot be null");

        this.options = options;
        this.sslOptions = ssl;
        this.threadFactory = new TrackableThreadFactory(ioThreadName, true);

        final String[] nativeIOPreference = options.nativeIOPreference();

        EventLoopGroup selectedGroup = null;
        Class<? extends Channel> selectedChannelClass = null;

        if (options.allowNativeIO()) {
            for (String nativeID : nativeIOPreference) {
                if (EpollSupport.NAME.equalsIgnoreCase(nativeID)) {
                    if (EpollSupport.isAvailable(options)) {
                        LOG.trace("Netty Transports will be using Epoll mode");
                        selectedGroup = EpollSupport.createGroup(1, threadFactory);
                        selectedChannelClass = EpollSupport.getChannelClass();
                        break;
                    }
                } else if (IOUringSupport.NAME.equalsIgnoreCase(nativeID)) {
                    if (IOUringSupport.isAvailable(options)) {
                        LOG.trace("Netty Transports will be using IO-Uring mode");
                        selectedGroup = IOUringSupport.createGroup(1, threadFactory);
                        selectedChannelClass = IOUringSupport.getChannelClass();
                        break;
                    }
                } else if (KQueueSupport.NAME.equalsIgnoreCase(nativeID)) {
                    if (KQueueSupport.isAvailable(options)) {
                        LOG.trace("Netty Transports will be using KQueue mode");
                        selectedGroup = KQueueSupport.createGroup(1, threadFactory);
                        selectedChannelClass = KQueueSupport.getChannelClass();
                        break;
                    }
                } else {
                    throw new IllegalArgumentException(
                        String.format("Provided preferred native transport type name: %s, is not supported.", nativeID));
                }
            }
        }

        if (selectedGroup == null) {
            LOG.trace("Netty Transports will be using NIO mode");
            selectedGroup = new NioEventLoopGroup(1, threadFactory);
            selectedChannelClass = NioSocketChannel.class;
        }

        this.group = selectedGroup;
        this.channelClass = selectedChannelClass;
    }