[Haskell-cafe] ANN: restricted-workers-0.1
Introducing: restricted-workers library, version 0.1.0. This library provides an abstract interface for running various kinds of workers under resource restrictions. It is being developed as part of the interactive-diagrams project and you can read more about the origins of the library in my GSoC report: http://parenz.wordpress.com/2013/07/15/interactive-diagrams-gsoc-progress-report/ The library provides a convenient way of running worker processes, saving data obtained by the workers at start-up, a simple pool abstraction and a configurable security and resource limitations. Right now there are several kinds of security restrictions that could be applied to the worker process: - RLimits - chroot jail - custom process euid - cgroups - process niceness - SELinux security context You can read more about the library on the wiki: https://github.com/co-dan/interactive-diagrams/wiki/Restricted-Workers The library has been uploaded to hackage and you can install it using cabal-install. -- Thanks -- Daniil Frumin ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
[Haskell-cafe] xmonad (+ mate) evince problem?
Hi. I am using xmonad + mate (on fedora 19) and evince (PDF viewer) seems unresponsive: it reacts to my (mouse) input only after switching to another screen and back. Any hints? - Thanks, J. W. ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Renumbered mailing list posts
Hi, Am Samstag, den 10.08.2013, 10:49 +0200 schrieb Henning Thielemann: Recently I found that links from Google search results to archive Haskell-Cafe messages are invalid. The messages are still there, but got a different number. E.g. the search result says: http://www.haskell.org/pipermail/haskell-cafe/2011-February/089455.html But the message is at http://www.haskell.org/pipermail/haskell-cafe/2011-February/088146.html Also links from Haskell-Wiki articles to the Haskell-Cafe archive are invalid now. This is very very very bad, since I used tons of such URLs in Wiki articles and it is very hard to find the message I referred to, if the URL does not work anymore. happens with mailman/pipermail occasionally. It is more reliable to link to message ids, e.g. via gmame: http://mid.gmane.org/4D779F63.9050506%40irit.fr (random example from my browser history) lists.debian.org also allows links with message ids: http://lists.debian.org/20120408083121.GB9680@flashgordon (another random example) but I don’t know if this is an easy to enable standard mailman feature. Greetings, Joachim -- Joachim “nomeata” Breitner m...@joachim-breitner.de • http://www.joachim-breitner.de/ Jabber: nome...@joachim-breitner.de • GPG-Key: 0x4743206C Debian Developer: nome...@debian.org signature.asc Description: This is a digitally signed message part ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Renumbered mailing list posts
2013/8/12 Joachim Breitner m...@joachim-breitner.de: happens with mailman/pipermail occasionally. o_O That's news to me... Why/how does this happen? This sounds like a serious bug to me, the URLs should really, really be stable to be of any use. It is more reliable to link to message ids, e.g. via gmame: [...] That hint doesn't really help to unbreak the Haskell wiki, the various trac instances, my mailbox, etc. :-( ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Renumbered mailing list posts
Hi, Am Montag, den 12.08.2013, 14:52 +0200 schrieb Sven Panne: 2013/8/12 Joachim Breitner m...@joachim-breitner.de: happens with mailman/pipermail occasionally. o_O That's news to me... Why/how does this happen? This sounds like a serious bug to me, the URLs should really, really be stable to be of any use. I only observed it, never debugged it, but I think a common case is if mailing lists posts are removed (e.g. because they are spam) and then the archive is re-created. It is more reliable to link to message ids, e.g. via gmame: [...] That hint doesn't really help to unbreak the Haskell wiki, the various trac instances, my mailbox, etc. :-( Unfortunately true. Greetings, Joachim -- Joachim “nomeata” Breitner m...@joachim-breitner.de • http://www.joachim-breitner.de/ Jabber: nome...@joachim-breitner.de • GPG-Key: 0x4743206C Debian Developer: nome...@debian.org signature.asc Description: This is a digitally signed message part ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] more gtk help
Hi Brian, On 12/08/13 03:52, bri...@aracnet.com wrote: ... Couldn't match expected type ... Gtk.on Gtk.exposeEvent glCanvas $ \ _ - putStrLn foo ... I looked up the type of Gtk.on and exposeEvent : ... on :: object - Signal object callback - callback - IO (ConnectId object) ... I think you have the arguments flipped, try: Gtk.on glCanvas Gtk.exposeEvent $ \_ - ... As for explaining the types - as I understand it, you have an object and a callback, and the Signal associates the object with the callback for a specific event type. The type variables occur more than once in the whole type for safety: the right type of callback must be provided for the event type, and the object must support the event type too. Claude -- http://mathr.co.uk ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
[Haskell-cafe] Default query for AcidState?
I am looking for something with a type signature like this:
grabAcidState :: AcidState as - IO as
basically I just want to return my data from database abstractly or based
on a class.
The reason for this is because I want to have a class instance of state and
then I can implement my library like so:
data MyCoolData :: MyCoolData T.Text
class HasCoolData a where
getCoolDataList :: a - MyCoolData
grabStoredList :: HasCoolData as = AcidState as - IO [MyCoolData]
grabStoredList as = do
cs - grabAcidState as
return $ getCoolDataList cs
and users could implement it like so:
data AppState = AppState {
someCoolData :: [MyCoolData]
}
instance HasCoolData AppState {
getCoolDataList = someCoolData
}
However trying to implement this simple behavior has been proving quite
difficult. Maybe I am making this too difficult and I should just have a
seperate AcidState datatype for my library.
Any help would be appreciated.
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