Examples with ErrorChannelFutureListener com.linkedin.r2.transport.http.client.common.ErrorChannelFutureListener used on opensource projects

Example 1 with ErrorChannelFutureListener

use of com.linkedin.r2.transport.http.client.common.ErrorChannelFutureListener in project rest.li by linkedin.

the class HttpNettyClient method doWriteRequest.

@Override
protected void doWriteRequest(RestRequest request, RequestContext requestContext, SocketAddress address, Map<String, String> wireAttrs, final TimeoutTransportCallback<RestResponse> callback, long requestTimeout) {
    final RestRequest newRequest = new RestRequestBuilder(request).overwriteHeaders(WireAttributeHelper.toWireAttributes(wireAttrs)).build();
    requestContext.putLocalAttr(R2Constants.HTTP_PROTOCOL_VERSION, HttpProtocolVersion.HTTP_1_1);
    final AsyncPool<Channel> pool;
    try {
        pool = getChannelPoolManagerPerRequest(request).getPoolForAddress(address);
    } catch (IllegalStateException e) {
        errorResponse(callback, e);
        return;
    }
    final Cancellable pendingGet = pool.get(new Callback<Channel>() {

        @Override
        public void onSuccess(final Channel channel) {
            // This handler ensures the channel is returned to the pool at the end of the
            // Netty pipeline.
            channel.attr(ChannelPoolHandler.CHANNEL_POOL_ATTR_KEY).set(pool);
            callback.addTimeoutTask(() -> {
                AsyncPool<Channel> pool1 = channel.attr(ChannelPoolHandler.CHANNEL_POOL_ATTR_KEY).getAndSet(null);
                if (pool1 != null) {
                    pool1.dispose(channel);
                }
            });
            TransportCallback<RestResponse> sslTimingCallback = SslHandshakeTimingHandler.getSslTimingCallback(channel, requestContext, callback);
            // This handler invokes the callback with the response once it arrives.
            channel.attr(RAPResponseHandler.CALLBACK_ATTR_KEY).set(sslTimingCallback);
            // Set the session validator requested by the user
            SslSessionValidator sslSessionValidator = (SslSessionValidator) requestContext.getLocalAttr(R2Constants.REQUESTED_SSL_SESSION_VALIDATOR);
            channel.attr(NettyChannelAttributes.SSL_SESSION_VALIDATOR).set(sslSessionValidator);
            final NettyClientState state = _state.get();
            if (state == NettyClientState.REQUESTS_STOPPING || state == NettyClientState.SHUTDOWN) {
                // In this case, we acquired a channel from the pool as request processing is halting.
                // The shutdown task might not timeout this callback, since it may already have scanned
                // all the channels for pending requests before we set the callback as the channel
                // attachment.  The TimeoutTransportCallback ensures the user callback in never
                // invoked more than once, so it is safe to invoke it unconditionally.
                errorResponse(sslTimingCallback, new TimeoutException("Operation did not complete before shutdown"));
                // The channel is usually release in two places: timeout or in the netty pipeline.
                // Since we call the callback above, the timeout associated will be never invoked. On top of that
                // we never send the request to the pipeline (due to the return statement), and nobody is releasing the channel
                // until the channel is forcefully closed by the shutdownTimeout. Therefore we have to release it here
                AsyncPool<Channel> pool = channel.attr(ChannelPoolHandler.CHANNEL_POOL_ATTR_KEY).getAndSet(null);
                if (pool != null) {
                    pool.put(channel);
                }
                return;
            }
            // here we want the exception in outbound operations to be passed back through pipeline so that
            // the user callback would be invoked with the exception and the channel can be put back into the pool
            channel.writeAndFlush(newRequest).addListener(new ErrorChannelFutureListener());
        }

        @Override
        public void onError(Throwable e) {
            errorResponse(callback, e);
        }
    });
    if (pendingGet != null) {
        callback.addTimeoutTask(pendingGet::cancel);
    }
}