[erlang-questions] how to break the problem. the erlang way?

Rapsey <>
Fri Jul 31 16:58:33 CEST 2009


Yes something like that, though I'm sure you would not need 5 processes.
Process tasks do not need to be so finely grained, but can be if you really
need the flexibility.


Sergej

On Fri, Jul 31, 2009 at 4:47 PM, Ovidiu Deac <> wrote:

> I'm doing some evaluation of erlang so I came with the following problem:
>
> "The application has to subscribe to a multicast address and receive
> binary packets. One packet per datagram. Each packet has a lenght, a
> sequence number and a number of messages inside. Packets have to be
> processed in their sequence number order. The messages have to be
> extracted from the packets and written in a file."
>
> I come with C++/Python experience and in OO approach I would have the
> following components:
> 1. A Receiver who connects to the multicast and receives the packets
> 2. An Orderer who's responsability is to order the packets by their
> sequence number and detect the missing ones.
> 3. An Unpacker who's responsability is to unpack the incomming packets
> and extract the messages.
> 4. A Decoder who does the deserialization of the messages
> 5. A Writer who puts the messages in the file.
>
> Now if I move all this to Erlang I would map the objects to processes.
> Instead of having objects with methods being called I have processes
> which receive messages. So the 5 components would run as separate
> processes. Each one does a little job and passes the result to the
> next one.
>
> Is this the Erlang way? Or is it just too much message passing overhead?
>
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