JAVA NIO服务器-不接收客户端空白消息/部分消息

Question

我使用带有服务器套接字通道和套接字通道的NIO包构建了服务器和客户端。 基本设置有效。 但是，当我尝试使用执行程序服务在单独的线程中移动处理每个连接的代码时，我开始收到一些奇怪的错误，其中我得到了部分消息或有时是空白消息。

这是我的代码，我将选择密钥传递给具有执行程序服务的线程

private void readAndRespond(SelectionKey selectionKey) {
    this.executorService.submit(new Worker(selectionKey));
}

private class Worker implements Runnable {
    private SelectionKey selectionKey;

    private Worker(SelectionKey selectionKey) {
        this.selectionKey = selectionKey;
    }

    @Override
    public void run() {
        SocketChannel socketChannel;
        ArrayList<ByteBuffer> buffers;
        String data, reply;
        ByteBuffer responseBuffer;

        socketChannel = (SocketChannel) selectionKey.channel();

        try {
            buffers = this.readRequest(socketChannel);
            data = this.extractData(buffers);

            if (!data.isEmpty()) {
                reply = responseManager.reply(data);
                responseBuffer = ByteBuffer.wrap(reply.getBytes());
                socketChannel.write(responseBuffer);
            }
        }
        catch (IOException e) {
            System.out.println("Unable to process response " + e.getMessage());
        }
    }

    private ArrayList<ByteBuffer> readRequest(SocketChannel socketChannel) throws IOException {
        int counter;
        ByteBuffer current;
        ArrayList<ByteBuffer> buffers;

        counter = 2;
        buffers = new ArrayList<>();
        current = ByteBuffer.allocate(minBuffer);
        buffers.add(current);

        while (socketChannel.read(current) > 0) {
            if (!current.hasRemaining()) {
                current = ByteBuffer.allocate(minBuffer * 2 * counter);
                buffers.add(current);
                counter++;
            }
        }

        return buffers;
    }

    private String extractData(ArrayList<ByteBuffer> buffers) throws UnsupportedEncodingException {
        StringBuilder stringBuilder;

        stringBuilder = new StringBuilder();
        for(ByteBuffer buffer : buffers) {
            stringBuilder.append(new String(buffer.array(), "UTF-8"));
        }

        return stringBuilder.toString().trim();
    }
}

Answer 1

在移交给线程阅读之前需要添加它

selectionKey.interestOps( selectionKey.interestOps() & ~SelectionKey.OP_READ );