Re: YAMI4 1.6.0 released

[Maciej Sobczak <see.my.homepage@gmail.com>]

W dniu poniedziałek, 10 września 2012 13:08:32 UTC+2 użytkownik (Nieznane) napisał:
> That's very interesting, as I'm currently looking for a good basis for a larger project of mine. I have three questions:
> 
> 1. Can it do NAT traversal?

I'm not 100% sure what do you mean by this, but YAMI4 is "friendly" with regard to both NAT and firewalls in the sense described here:

http://www.inspirel.com/yami4/book/8-1.html

In other words, the communicating parties can reverse their client-server roles after the connection is established, so that the server can sit behind the firewall or NAT.

> 2. Which underlying transport protocols are used, TCP, UDP, UDT, ...?

TCP and UDP are both supported. In addition, Unix sockets can be used for communication between processes on Unix systems.

> 3. Does it handle timeouts gracefully, i.e. allow the user to specify timeout values for socket operations?

There is a configurable timeout for creating connections. In addition to this, individual messages can be "timed out" in a way that is much better integrated with the language, as logical messages are represented by protected objects. That is, an appropriate entry call allows to discover whether the message is in the given state and this can be performed in a standard select pattern. This means that not only timeouts are supported, but also more involved scenarios can be easily achieved that are completely impossible with other messaging/communication libraries. For example, you can send several independent messages to different servers and in a single select statement that gathers all of them wait for the one that is processed the fastest. This level of programming comfort has no equivalent with simple timeouts.

-- 
Maciej Sobczak * http://www.inspirel.com