Synnefo » snf-ganeti

{-| Implementation of the job information.

-}

{-

Copyright (C) 2009 Google Inc.

This program is free software; you can redistribute it and/or modify

it under the terms of the GNU General Public License as published by

the Free Software Foundation; either version 2 of the License, or

(at your option) any later version.

This program is distributed in the hope that it will be useful, but

WITHOUT ANY WARRANTY; without even the implied warranty of

MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

General Public License for more details.

You should have received a copy of the GNU General Public License

along with this program; if not, write to the Free Software

Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA

02110-1301, USA.

-}

module Ganeti.Jobs

    ( JobStatus(..)

    ) where

import Text.JSON (readJSON, showJSON, JSON)

import qualified Text.JSON as J

-- | The JobStatus data type. Note that this is ordered especially

-- such that greater\/lesser comparison on values of this type makes

-- sense.

data JobStatus = JobQueued

               | JobWaitLock

               | JobRunning

               | JobSuccess

               | JobCanceling

               | JobCanceled

               | JobError

               | JobGone

                 deriving (Eq, Enum, Ord, Bounded, Show)

instance JSON JobStatus where

    showJSON js = showJSON w

        where w = case js of

                    JobQueued -> "queued"

                    JobWaitLock -> "waiting"

                    JobCanceling -> "canceling"

                    JobRunning -> "running"

                    JobCanceled -> "canceled"

                    JobSuccess -> "success"

                    JobError -> "error"

                    JobGone -> "gone" -- Fake status

    readJSON s = case readJSON s of

                   J.Ok "queued" -> J.Ok JobQueued

                   J.Ok "waiting" -> J.Ok JobWaitLock

                   J.Ok "canceling" -> J.Ok JobCanceling

                   J.Ok "running" -> J.Ok JobRunning

                   J.Ok "success" -> J.Ok JobSuccess

                   J.Ok "canceled" -> J.Ok JobCanceled

                   J.Ok "error" -> J.Ok JobError

                   _ -> J.Error ("Unknown job status " ++ show s)