Examples with ChannelFutureListener io.netty.channel.ChannelFutureListener used on opensource projects

Example 91 with ChannelFutureListener

use of io.netty.channel.ChannelFutureListener in project iris by chicc999.

the class HandlerTask method run.

@Override
public void run() {
    // 处理请求命令
    Header header = request.getHeader();
    Command response = null;
    try {
        response = handler.process(ctx, request);
    } catch (Throwable e) {
        //如果请求需要答复
        if (request.getHeader().getAcknowledge() != Acknowledge.ACK_NO) {
            //写出响应,如果出现异常则调用exceptionCaught打印异常关闭连接
            ctx.writeAndFlush(new ErrorResponse(-1, e.getMessage(), request.getRequestId())).addListener(ChannelFutureListener.FIRE_EXCEPTION_ON_FAILURE);
        }
    }
    response.getHeader().setRequestId(request.getRequestId());
    ChannelFutureListener listenner = response.getListenner() == null ? ChannelFutureListener.FIRE_EXCEPTION_ON_FAILURE : response.getListenner();
    //服务端不处理commandCallback,直接在DispatcherHandler处理对应type.客户端则在发送时指定回调函数.
    ctx.writeAndFlush(response).addListener(listenner);
}

Example 92 with ChannelFutureListener

use of io.netty.channel.ChannelFutureListener in project hive by apache.

the class Rpc method call.

/**
 * Send an RPC call to the remote endpoint and returns a future that can be used to monitor the
 * operation.
 *
 * @param msg RPC call to send.
 * @param retType Type of expected reply.
 * @return A future used to monitor the operation.
 */
public <T> Future<T> call(final Object msg, Class<T> retType) {
    Preconditions.checkArgument(msg != null);
    Preconditions.checkState(channel.isActive(), "RPC channel is closed.");
    try {
        final long id = rpcId.getAndIncrement();
        final Promise<T> promise = createPromise();
        final ChannelFutureListener listener = new ChannelFutureListener() {

            @Override
            public void operationComplete(ChannelFuture cf) {
                if (!cf.isSuccess() && !promise.isDone()) {
                    LOG.warn("Failed to send RPC, closing connection.", cf.cause());
                    promise.setFailure(cf.cause());
                    dispatcher.discardRpc(id);
                    close();
                }
            }
        };
        dispatcher.registerRpc(id, promise, msg.getClass().getName());
        channel.eventLoop().submit(new Runnable() {

            @Override
            public void run() {
                channel.write(new MessageHeader(id, Rpc.MessageType.CALL)).addListener(listener);
                channel.writeAndFlush(msg).addListener(listener);
            }
        });
        return promise;
    } catch (Exception e) {
        throw Throwables.propagate(e);
    }
}