No - because of the way it works it handles the request inside apache - the worker/event systems work by handing the request back to another process or processes in the background which handles the request and then returns - which is where the problem lies in the fact that you are effectively adding a proxy layer between the web-request and the actual perl process...

It limits what you can do with Plack when it comes to handling aspects of the request which are better handled outside the main response phase {e.g. re-write, logging, cleanup etc} which limits functionality - most people who just use response handlers do not see this issue. But we hook into about 10 phases of the apache process ...


On 08/06/2018 02:08, John Dunlap wrote:
Does using mod_perl properly allow you to use mpm_event or mpm_worker?

On Thu, Jun 7, 2018 at 9:19 PM, Dr James Smith <j...@sanger.ac.uk <mailto:j...@sanger.ac.uk>> wrote:

    Unfortunately Plack (and Catalyst especially) are a fairly poor
    comparison to using mod_perl properly {unfortunately very few
    people do so} I've looked at Dancer and Catalyst - both are OK at
    what they do - but they don't really handle things in the really
    clean easy way that mod_perl does {if you attach code to the right
    handlers/filters} meaning chopping in and changing code can be
    quite difficult in them.

    Both are good for simplish applications {yes and I've seen complex
    apps written in them as well - but they usually need a lot more
    hardware support than the equivalent mod_perl app to cope with demand}

    Unfortunately writing good mod_perl apps is hard - and so few
    mod_perl apps really make use of the underlying framework properly
    - effectively using it for code caching and not much else



    On 07/06/2018 19:24, David Hodgkinson wrote:
    Moving your method handlers to the framework.

    I like catalyst. Stand on the shoulders of giants. Mojolicious
    makes me itch.

    On 7 Jun 2018, at 19:21, John Dunlap <j...@lariat.co
    <mailto:j...@lariat.co>> wrote:

    What is involved in porting an application from mod_perl to starman?

    Throwing away logic and logical structure and replacing it with a
    much less flexible approach...
    On Thu, Jun 7, 2018 at 6:18 PM, Clive Eisen
    <cl...@hildebrand.co.uk <mailto:cl...@hildebrand.co.uk>> wrote:

        On 7 Jun 2018, at 19:13, David Hodgkinson
        <daveh...@gmail.com <mailto:daveh...@gmail.com>> wrote:

        No. Different concept.

        On 7 Jun 2018, at 18:52, John Dunlap <j...@lariat.co
        <mailto:j...@lariat.co>> wrote:

        Is Plack backwards compatible with mod_perl?

        On Thu, Jun 7, 2018 at 5:44 PM, David Hodgkinson
        <daveh...@gmail.com <mailto:daveh...@gmail.com>> wrote:

            We’re all about the Plack these days.


        This.

        We have moved entirely to

        nginx (doing the ssl where appropriate) -> starman (which
        uses plack) and Dancer2

        Life is a LOT better

        —
        Clive




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