Write ordering

[Pei Sun]

Hi Netty-users and experts,

    I have a question about the write ordering in netty.

// The following all happens in one thread.

channel.writeAndFlush(msg1);

channel.writeAndFlush(msg2);

Is it guaranteed that msg2 will be written after msg1? 

4.0 release notes mentioned about this and stated that the ordering are not well-defined if we mix event-loop thread and other threads. But what if I all invoke the writeAndFlush in one thread (not the event-loop thread)?

What if I do the following in one thread?

channel.eventloop().submit(new runnable() {

   public void run() {channel.writeAndFlush(msg1);}

}

channel.eventloop().submit(new runnable() {

   public void run() {channel.writeAndFlush(msg2);}

}

Thanks a lot.

Pei Sun

[Norman Maurer]

On 12 Dec 2016, at 08:23, Pei Sun <peisu...@gmail.com> wrote:

Hi Netty-users and experts,

    I have a question about the write ordering in netty.

// The following all happens in one thread.

channel.writeAndFlush(msg1);

channel.writeAndFlush(msg2);

Is it guaranteed that msg2 will be written after msg1? 

Yes it is.

4.0 release notes mentioned about this and stated that the ordering are not well-defined if we mix event-loop thread and other threads. But what if I all invoke the writeAndFlush in one thread (not the event-loop thread)?

What if I do the following in one thread?

channel.eventloop().submit(new runnable() {

   public void run() {channel.writeAndFlush(msg1);}

}

channel.eventloop().submit(new runnable() {

   public void run() {channel.writeAndFlush(msg2);}

}

This will still run in the Eventloop thread.

Thanks a lot.

Pei Sun

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[pe...@alluxio.com]

Thank you, Norman.