Why is it invoked in a multithread environment? You can use deferToThread, which gives you a deferred which runs in a thread. cheers lvh

On Sat, May 07, 2011 at 04:49:22PM +0800, Dfgqq Dfgqq wrote:

Hi all

I have a function like:

def longQuery(xxx)

this function will be invoked simultaneously (it means multiple thread environment) and this function may take a while to complete.

so my question is whether i should use reactor.callInThread to take benefit from non blocking

briefly you should use `callInThread` in two cases: when your code does some long computation and when you use some libraries that do network communication in a blocking manner.

or use deferred object ?

It seems that deferred object doens't use threads.

http://twistedmatrix.com/documents/current/core/howto/gendefer.html#auto2 If `longQuery` is a DB query you should look at twisted.enterprise.adbapi http://twistedmatrix.com/documents/current/core/howto/rdbms.html m. -- La vera terra dei barbari non è quella che non ha mai conosciuto l'arte, ma quella che, disseminata di capolavori, non sa nè apprezzarli nè conservarli. -- Marcel Proust