[Twisted-Python] Using spawnProcess

[exarkun at twistedmatrix.com]

On 12:24 pm, grigorescu_ciprian at yahoo.com wrote:
>Hello,
>I have wrote a custom protocol(inherit from SMTPClient) and 
>factory(inherit from ClientFactory) in order to send emails from 
>multiple ips(multiple connections, factories).
>
>Now I want to run this pice of code multiple times using spawnProcess 
>to send emails simultaneous, each process having "n" connections from 
>"n" ips.
>
>How can i use spawnProcess? Or is another way to send emails in a 
>parallel fashion with twisted? Maybe another approach?

You don't need multiple processes to send email concurrently.  If you 
were to use `twisted.mail.smtp.sendmail`, then you could do this by just 
making multiple calls to `sendmail`.  You don't have to wait for one 
email to be completely sent before you start trying to send the next 
one.  For example, to send two emails concurrently:


    from sys import stdout

    from twisted.mail.smtp import sendmail
    from twisted.internet.defer import gatherResults
    from twisted.internet.task import react
    from twisted.python.log import startLogging

    def main():
        return gatherResults([
            sendmail(...),
            sendmail(...),
        ])

    startLogging(stdout)
    react(main, [])

You should be able to do something similar with the API you've 
constructed (or perhaps you can just use `sendmail` instead).

Jean-Paul