monitor.stateChanges() function
monitor.stateChanges() detects state changes in a stream of data with a _level column
and outputs records that change from fromLevel to toLevel.
Function type signature
(<-tables: stream[{C with _level: D}], ?fromLevel: A, ?toLevel: B) => stream[E] where A: Equatable, B: Equatable, D: Equatable, E: Record
For more information, see Function type signatures.
Parameters
fromLevel
Level to detect a change from. Default is "any".
toLevel
Level to detect a change to. Default is "any".
tables
Input data. Default is piped-forward data (<-).
Examples
Detect when the state changes to critical
import "array"
import "influxdata/influxdb/monitor"
data =
array.from(
rows: [
{_time: 2021-01-01T00:00:00Z, _level: "ok"},
{_time: 2021-01-01T00:01:00Z, _level: "ok"},
{_time: 2021-01-01T00:02:00Z, _level: "warn"},
{_time: 2021-01-01T00:03:00Z, _level: "crit"},
],
)
data
|> monitor.stateChanges(toLevel: "crit")
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