DefaultEventLoopTest Class — netty Architecture

Source Code

testsuite/src/main/java/io/netty/testsuite/transport/DefaultEventLoopTest.java lines 38–118

public class DefaultEventLoopTest extends AbstractSingleThreadEventLoopTest {

    @Test
    @Timeout(value = 3000, unit = TimeUnit.MILLISECONDS)
    public void testChannelsIteratorNotSupported() throws Exception {
        EventLoopGroup group = newEventLoopGroup();
        final SingleThreadEventLoop loop = (SingleThreadEventLoop) group.next();
        try {
            final Channel ch = newChannel();
            loop.register(ch).syncUninterruptibly();

            assertThrows(UnsupportedOperationException.class, new Executable() {
                @Override
                public void execute() throws Throwable {
                    loop.registeredChannelsIterator();
                }
            });
        } finally {
            group.shutdownGracefully();
        }
    }

    @Override
    protected EventLoopGroup newEventLoopGroup() {
        return new DefaultEventLoopGroup();
    }

    @Override
    protected EventLoopGroup newAutoScalingEventLoopGroup() {
        return new AutoScalingDefaultEventLoopGroup(SCALING_MAX_THREADS, AUTO_SCALING_CHOOSER_FACTORY);
    }

    @Override
    protected Channel newChannel() {
        return new LocalChannel();
    }

    @Override
    protected Class<? extends ServerChannel> serverChannelClass() {
        return LocalServerChannel.class;
    }

    private static final class SuspendableDefaultEventLoop extends SingleThreadEventLoop {
        SuspendableDefaultEventLoop(EventLoopGroup parent, Executor executor) {
            super(parent, executor, true, true, DEFAULT_MAX_PENDING_TASKS,
                  RejectedExecutionHandlers.reject());
        }

        @Override
        protected void run() {
            for (;;) {
                Runnable task = takeTask();
                if (task != null) {
                    runTask(task);
                    updateLastExecutionTime();
                }

                // Check if a suspend is requested and we have no more tasks. If so,
                // exit the run() method to allow the suspension to complete.
                if (canSuspend()) {
                    break;
                }

                if (confirmShutdown()) {
                    break;
                }
            }
        }
    }

    private static final class AutoScalingDefaultEventLoopGroup extends MultithreadEventLoopGroup {
        AutoScalingDefaultEventLoopGroup(int nThreads, EventExecutorChooserFactory chooserFactory) {
            super(nThreads, (Executor) null, chooserFactory);
        }

        @Override
        protected EventLoop newChild(Executor executor, Object... args) throws Exception {
            return new SuspendableDefaultEventLoop(this, executor);
        }
    }
}