influxdb-1.2.2.3: Haskell client library for InfluxDB

Safe Haskell	None
Language	Haskell2010

Database.InfluxDB.JSON

Contents

Result parsers
- Decoder settings
Getting fields and tags
Common JSON object parsers
- Utility functions

Synopsis

Result parsers

parseResultsWith Source #

Arguments

:: (Maybe Text -> HashMap Text Text -> Vector Text -> Array -> Parser a)

A parser that takes

an optional name of the series
a map of tags
an array of field names
an array of values

to construct a value.

-> Parser (Vector a)

A helper function to parse a JSON response in parseResults.

parseResultsWithDecoder Source #

Arguments

:: Decoder a
-> (Maybe Text -> HashMap Text Text -> Vector Text -> Array -> Parser a)	A parser that takes an optional name of the series a map of tags an array of field names an array of values to construct a value.
-> Value
-> Parser (Vector a)

Parse a JSON response with specified decoder settings.

Decoder settings

data Decoder a Source #

Decoder settings

Constructors

Decoder
Fields decodeEach :: Parser a -> Parser b How to turn a parser for each element into another. For example, a failure can be turned into `Nothing`. decodeFold :: Parser (Vector b) -> Parser (Vector a) How to aggregate all results from `decodeEach` into a vector of results.

strictDecoder :: Decoder a Source #

Fail immediately if there's any parse failure.

lenientDecoder :: Decoder a Source #

Ignore parse failures and return successful results.

Getting fields and tags

getField Source #

Arguments

:: Monad m
=> Text	Column name
-> Vector Text	Columns
-> Vector Value	Field values
-> m Value

Get a field value from a column name

getTag Source #

Arguments

:: Monad m
=> Text	Tag name
-> HashMap Text Value	Tags
-> m Value

Get a tag value from a tag name

Common JSON object parsers

parseUTCTime :: Precision ty -> Value -> Parser UTCTime Source #

Parse either a POSIX timestamp or RFC3339 formatted timestamp as UTCTime.

parsePOSIXTime :: Precision ty -> Value -> Parser POSIXTime Source #

Parse either a POSIX timestamp or RFC3339 formatted timestamp as POSIXTime.

parseRFC3339 :: ParseTime time => Value -> Parser time Source #

Parse a RFC3339-formatted timestamp.

Note that this parser is slow as it converts a Text input to a String before parsing.

parseQueryField :: Value -> Parser QueryField Source #

Parse a QueryField.

Utility functions

parseResultsObject :: Value -> Parser (Vector Value) Source #

Parse a result response.

parseSeriesObject :: Value -> Parser (Vector Value) Source #

Parse a series response.

parseSeriesBody :: Value -> Parser (Maybe Text, HashMap Text Text, Vector Text, Array) Source #

Parse the common JSON structure used in query responses.

parseErrorObject :: Value -> Parser a Source #

Parse the common JSON structure used in failure response.