[rabbitmq-discuss] Catching channel disconnect

Wed Oct 15 01:41:19 BST 2008

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On Oct 14, 2008, at 4:31 PM, Valentino Volonghi wrote:

> Do you think this makes sense?

It does, it's in fact very simple:

http://github.com/dialtone/shovel/tree/master/src/shovel.erl#L55

connect(User, Password, To) ->
     connect(User, Password, To, 1000).

connect(User, Password, To, Backoff) ->
     try
         Connection = lib_amqp:start_connection(User, Password, To),
         Channel = lib_amqp:start_channel(Connection),
         {Connection, Channel}
     catch
         error:{badmatch,{error,econnrefused}} ->
             % so the remote is not reachable right now... let's backoff
             timer:sleep(Backoff),
             NewBackoff = lists:min([round(Backoff*? 
BACKOFF_MULTIPLIER), ?BACKOFF_MAX]),
             connect(User, Password, To, NewBackoff)
     end.

does the trick.

One thing I'm wondering though... Is tail recursion preserved when the  
call or the
return value is inside a try..catch or a case ... of ?

I'll patiently wait for the other patch to land tip :)

- --
Valentino Volonghi aka Dialtone
Now running MacOS X 10.5
Home Page: http://www.twisted.it
http://www.adroll.com

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