NioEventLoopTest Class — netty Architecture

Source Code

transport/src/test/java/io/netty/channel/nio/NioEventLoopTest.java lines 58–317

public class NioEventLoopTest extends AbstractEventLoopTest {

    @Override
    protected EventLoopGroup newEventLoopGroup() {
        return new MultiThreadIoEventLoopGroup(NioIoHandler.newFactory());
    }

    @Override
    protected Class<? extends ServerSocketChannel> newChannel() {
        return NioServerSocketChannel.class;
    }

    @Override
    protected Class<? extends io.netty.channel.socket.SocketChannel> newSocketChannel() {
        return NioSocketChannel.class;
    }

    @Test
    public void testRebuildSelector() {
        EventLoopGroup group = new NioEventLoopGroup(1);
        final NioEventLoop loop = (NioEventLoop) group.next();
        try {
            Channel channel = new NioServerSocketChannel();
            loop.register(channel).syncUninterruptibly();

            Selector selector = loop.unwrappedSelector();
            assertSame(selector, ((NioEventLoop) channel.eventLoop()).unwrappedSelector());
            assertTrue(selector.isOpen());

            // Submit to the EventLoop so we are sure its really executed in a non-async manner.
            loop.submit(new Runnable() {
                @Override
                public void run() {
                    loop.rebuildSelector();
                }
            }).syncUninterruptibly();

            Selector newSelector = ((NioEventLoop) channel.eventLoop()).unwrappedSelector();
            assertTrue(newSelector.isOpen());
            assertNotSame(selector, newSelector);
            assertFalse(selector.isOpen());

            channel.close().syncUninterruptibly();
        } finally {
            group.shutdownGracefully();
        }
    }

    @Test
    public void testScheduleBigDelayNotOverflow() {
        EventLoopGroup group = new MultiThreadIoEventLoopGroup(1, NioIoHandler.newFactory());

        final EventLoop el = group.next();
        Future<?> future = el.schedule(new Runnable() {
            @Override
            public void run() {
                // NOOP
            }
        }, Long.MAX_VALUE, TimeUnit.MILLISECONDS);

        assertFalse(future.awaitUninterruptibly(1000));
        assertTrue(future.cancel(true));
        group.shutdownGracefully();
    }

    @Test
    public void testInterruptEventLoopThread() throws Exception {
        EventLoopGroup group = new NioEventLoopGroup(1);
        final NioEventLoop loop = (NioEventLoop) group.next();
        try {
            Selector selector = loop.unwrappedSelector();
            assertTrue(selector.isOpen());

            loop.submit(new Runnable() {
                @Override
                public void run() {
                    // Interrupt the thread which should not end-up in a busy spin and
                    // so the selector should not have been rebuild.
                    Thread.currentThread().interrupt();
                }
            }).syncUninterruptibly();