Copyright	(c) Ian Duncan 2013
Stability	experimental
Portability	non-portable
Safe Haskell	Safe-Inferred
Language	Haskell2010

Data.HealthCheck

Description

A simple interface through which simple status dashboards can be built.

import Data.HealthCheck
import Data.Metrics.Reporter.StdOut

healthCheck1 :: HealthCheck
healthCheck1 = healthCheck "benign_warm_fuzzy_thing" $
  return $ StatusReport Good Nothing

healthCheck2 :: HealthCheck
healthCheck2 = healthCheck "nuclear_missile_launcher" $
  return $ StatusReport Ugly $ Just "out of missiles"

main :: IO ()
main = printHealthChecks [ healthCheck1, healthCheck2 ]

Synopsis

Documentation

data HealthCheck Source

A simple discrete health reporter

Constructors

HealthCheck
Fields healthCheckStatusReport :: IO StatusReport An action which determines the current status of the health check healthCheckName :: Text A unique identifier for the health check

type HealthChecks = [HealthCheck] Source

Clean up type signatures for bundling sets of health checks for reporting

healthCheck :: Text -> IO StatusReport -> HealthCheck Source

Create a health check.

data Status Source

Provides a simple status reporting mechanism for checking application health at a glance.

Constructors

Good	Everything appears to be going well.
Bad	Something is broken.
Ugly	There is some sort of non-critical issue that deserves attention.
Unknown	There is no information, either good or bad, at the moment. An example of this might be something like a loss of network connectivity to a non-crucial service.

Instances

Eq Status
Ord Status
Read Status
Show Status

data StatusReport Source

A report on the current status of a subsystem.

Constructors

StatusReport
Fields status :: Status Current status statusMessage :: Maybe Text An optional message to display about the current status.

Instances

Show StatusReport