SampleNode

stream
  |sample(3)

stream
  |sample(10s)

sample.quiet()

sample|alert()

sample|barrier()

sample|bottom(num int64, field string, fieldsAndTags ...string)

sample|changeDetect(field string)

sample|combine(expressions ...ast.LambdaNode)

sample|count(field string)

sample|cumulativeSum(field string)

    var data = stream
        |from()...
    // Trigger critical alert if the throughput drops below 100 points per 10s and checked every 10s.
    data
        |deadman(100.0, 10s)
    //Do normal processing of data
    data...

    var data = stream
        |from()...
    // Trigger critical alert if the throughput drops below 100 points per 10s and checked every 10s.
    data
        |stats(10s)
            .align()
        |derivative('emitted')
            .unit(10s)
            .nonNegative()
        |alert()
            .id('node \'stream0\' in task \'{{ .TaskName }}\'')
            .message('{{ .ID }} is {{ if eq .Level "OK" }}alive{{ else }}dead{{ end }}: {{ index .Fields "emitted" | printf "%0.3f" }} points/10s.')
            .crit(lambda: "emitted" <= 100.0)
    //Do normal processing of data
    data...

    var data = stream
        |from()...
    // Trigger critical alert if the throughput drops below 100 points per 10s and checked every 10s.
    data
        |deadman(100.0, 10s)
            .slack()
            .channel('#dead_tasks')
    //Do normal processing of data
    data...

    var data = stream
        |from()...
    // Trigger critical alert if the throughput drops below 100 points per 10s and checked every 10s.
    // Only trigger the alert if the time of day is between 8am-5pm.
    data
        |deadman(100.0, 10s, lambda: hour("time") >= 8 AND hour("time") <= 17)
    //Do normal processing of data
    data...

sample|deadman(threshold float64, interval time.Duration, expr ...ast.LambdaNode)

sample|default()

sample|delete()

sample|derivative(field string)

sample|difference(field string)

sample|distinct(field string)

sample|ec2Autoscale()

sample|elapsed(field string, unit time.Duration)

sample|eval(expressions ...ast.LambdaNode)

sample|first(field string)

sample|flatten()

    |groupBy(*)

sample|groupBy(tag ...interface{})

sample|holtWinters(field string, h int64, m int64, interval time.Duration)

sample|holtWintersWithFit(field string, h int64, m int64, interval time.Duration)

sample|httpOut(endpoint string)

sample|httpPost(url ...string)

sample|influxDBOut()

sample|join(others ...Node)

sample|k8sAutoscale()

sample|kapacitorLoopback()

sample|last(field string)

sample|log()

sample|max(field string)

sample|mean(field string)

sample|median(field string)

sample|min(field string)

sample|mode(field string)

sample|movingAverage(field string, window int64)

sample|percentile(field string, percentile float64)

sample|sample(rate interface{})

sample|shift(shift time.Duration)

sample|sideload()

sample|spread(field string)

sample|stateCount(expression ast.LambdaNode)

sample|stateDuration(expression ast.LambdaNode)

sample|stats(interval time.Duration)

sample|stddev(field string)

sample|sum(field string)

sample|swarmAutoscale()

sample|top(num int64, field string, fieldsAndTags ...string)

sample|trickle()

sample|union(node ...Node)

sample|where(expression ast.LambdaNode)

sample|window()