Flow PHP

ParentBasedSampler implements Sampler

Read onlyYes

FinalYes

Interfaces

Sampler

Methods

__construct() : mixed
__toString() : string: Get a string representation of this sampler for debugging.
shouldSample() : SamplingResult: Determine if a span should be sampled.

__construct()


    public
                    __construct(Sampler $rootSampler[, null|Sampler $remoteParentSampled = null ][, null|Sampler $remoteParentNotSampled = null ][, null|Sampler $localParentSampled = null ][, null|Sampler $localParentNotSampled = null ]) : mixed

Parameters

$rootSampler : Sampler: Sampler to use for root spans (no parent)
$remoteParentSampled : null|Sampler = null: Sampler for remote sampled parents (default: AlwaysOnSampler)
$remoteParentNotSampled : null|Sampler = null: Sampler for remote non-sampled parents (default: AlwaysOffSampler)
$localParentSampled : null|Sampler = null: Sampler for local sampled parents (default: AlwaysOnSampler)
$localParentNotSampled : null|Sampler = null: Sampler for local non-sampled parents (default: AlwaysOffSampler)

__toString()

Get a string representation of this sampler for debugging.


    public
                    __toString() : string

Examples:

"AlwaysOnSampler"
"TraceIdRatioBasedSampler{0.001}"
"ParentBased{root=AlwaysOnSampler}"

Return values

string

shouldSample()

Determine if a span should be sampled.


    public
                    shouldSample(Context $parentContext, Span $span) : SamplingResult

Parameters

$parentContext : Context: The parent context of the span to be created
$span : Span: The span to evaluate for sampling

Return values

SamplingResult —

The sampling decision