OpenCensus\Trace\Sampler

AlwaysSampleSampler

This implementation of the SamplerInterface always returns false. Use this sampler to attempt to trace all requests. You may be throttled by the server.

MultiSampler

This implementation of the SamplerInterface wraps any number of child SamplerInterface implementations. All provided implementations must return true in order for the request to be sampled.

NeverSampleSampler

This implementation of the SamplerInterface always returns false. Use this sampler to disable all tracing.

ProbabilitySampler

This implementation of the SamplerInterface uses a pseudo-random number generator to sample a percentage of requests.

QpsSampler

This implementation of the SamplerInterface uses a cache to limit sampling to the a certain number of queries per second. It requires a PSR-6 cache implementation.

SamplerInterface

This interface lets us customize the sampling logic.