root / src / Ganeti / DataCollectors / Types.hs @ f0e4b2a4
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{-# LANGUAGE TemplateHaskell #-} |
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{-| Implementation of the Ganeti data collector types. |
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-} |
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{- |
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Copyright (C) 2012, 2013 Google Inc. |
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This program is free software; you can redistribute it and/or modify |
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it under the terms of the GNU General Public License as published by |
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the Free Software Foundation; either version 2 of the License, or |
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(at your option) any later version. |
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This program is distributed in the hope that it will be useful, but |
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WITHOUT ANY WARRANTY; without even the implied warranty of |
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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General Public License for more details. |
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You should have received a copy of the GNU General Public License |
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along with this program; if not, write to the Free Software |
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
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02110-1301, USA. |
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-} |
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module Ganeti.DataCollectors.Types |
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( DCReport(..) |
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, DCCategory(..) |
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, DCVersion(..) |
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, buildReport |
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) where |
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import Text.JSON |
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import Ganeti.Constants as C |
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import Ganeti.THH |
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import Ganeti.Utils (getCurrentTime) |
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-- | The possible classes a data collector can belong to. |
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data DCCategory = DCInstance | DCStorage | DCDaemon | DCHypervisor |
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deriving (Show, Eq) |
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-- | The JSON instance for DCCategory. |
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instance JSON DCCategory where |
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showJSON = showJSON . show |
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readJSON = |
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error "JSON read instance not implemented for type DCCategory" |
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-- | Type representing the version number of a data collector. |
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data DCVersion = DCVerBuiltin | DCVersion String deriving (Show, Eq) |
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-- | The JSON instance for DCVersion. |
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instance JSON DCVersion where |
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showJSON DCVerBuiltin = showJSON C.builtinDataCollectorVersion |
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showJSON (DCVersion v) = showJSON v |
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readJSON = error "JSON read instance not implemented for type DCVersion" |
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-- | This is the format of the report produced by each data collector. |
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$(buildObject "DCReport" "dcReport" |
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[ simpleField "name" [t| String |] |
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, simpleField "version" [t| DCVersion |] |
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, simpleField "format_version" [t| Int |] |
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, simpleField "timestamp" [t| Integer |] |
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, optionalNullSerField $ |
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simpleField "category" [t| DCCategory |] |
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, simpleField "data" [t| JSValue |] |
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]) |
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-- | Utility function for building a report automatically adding the current |
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-- timestamp (rounded up to seconds). |
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-- If the version is not specified, it will be set to the value indicating |
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-- a builtin collector. |
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buildReport :: String -> DCVersion -> Int -> Maybe DCCategory -> JSValue |
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-> IO DCReport |
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buildReport name version format_version category jsonData = do |
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now <- getCurrentTime |
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let timestamp = now * 1000000000 :: Integer |
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return $ DCReport name version format_version timestamp category jsonData |