AbstractOioChannel Class — netty Architecture

Source Code

transport/src/main/java/io/netty/channel/oio/AbstractOioChannel.java lines 31–166

@Deprecated
public abstract class AbstractOioChannel extends AbstractChannel {

    protected static final int SO_TIMEOUT = 1000;

    boolean readPending;
    boolean readWhenInactive;
    final Runnable readTask = new Runnable() {
        @Override
        public void run() {
            doRead();
        }
    };
    private final Runnable clearReadPendingRunnable = new Runnable() {
        @Override
        public void run() {
            readPending = false;
        }
    };

    /**
     * @see AbstractChannel#AbstractChannel(Channel)
     */
    protected AbstractOioChannel(Channel parent) {
        super(parent);
    }

    @Override
    protected AbstractUnsafe newUnsafe() {
        return new DefaultOioUnsafe();
    }

    private final class DefaultOioUnsafe extends AbstractUnsafe {
        @Override
        public void connect(
                final SocketAddress remoteAddress,
                final SocketAddress localAddress, final ChannelPromise promise) {
            if (!promise.setUncancellable() || !ensureOpen(promise)) {
                return;
            }

            try {
                boolean wasActive = isActive();
                doConnect(remoteAddress, localAddress);

                // Get the state as trySuccess() may trigger an ChannelFutureListener that will close the Channel.
                // We still need to ensure we call fireChannelActive() in this case.
                boolean active = isActive();

                safeSetSuccess(promise);
                if (!wasActive && active) {
                    pipeline().fireChannelActive();
                }
            } catch (Throwable t) {
                safeSetFailure(promise, annotateConnectException(t, remoteAddress));
                closeIfClosed();
            }
        }
    }

    @Override
    protected boolean isCompatible(EventLoop loop) {
        return loop instanceof ThreadPerChannelEventLoop;
    }

    /**
     * Connect to the remote peer using the given localAddress if one is specified or {@code null} otherwise.
     */
    protected abstract void doConnect(
            SocketAddress remoteAddress, SocketAddress localAddress) throws Exception;

    @Override
    protected void doBeginRead() throws Exception {
        if (readPending) {
            return;
        }
        if (!isActive()) {
            readWhenInactive = true;
            return;
        }