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go.temporal.io/server/common/dynamicconfig/rollout.go

27 LOC · 9 covered · 18 uncovered · 3 ranges · 4 concepts · 3 introducers · 3 tests

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Focused file, its introducer and connector concepts, their introduced files, and tests that run code from the fileworkflow_handler.go ×1 · 2 introduced LOCworkflow_handler.go ×1rollout.go ×1 · 2 introduced LOCrollout.go ×1rollout.go ×1 · 3 introduced LOCrollout.go ×1rollout.go ×1 · 4 introduced LOCrollout.go ×1TestRolloutAccepts_Boundaries · introduced test · go.temporal.io/server/common/dynamicconfig/TestRolloutAccepts_BoundariesTestRolloutAccepts_Bound…TestRolloutAccepts_Monotonic · introduced test · go.temporal.io/server/common/dynamicconfig/TestRolloutAccepts_MonotonicTestRolloutAccepts_Monot…creation_config_still_enables_both · introduced test · go.temporal.io/server/service/frontend/TestCHASMSchedulerRoutingAndCreationGates/creation_config_still_enables_bothcreation_config_still_en…Focused file · go.temporal.io/server/common/dynamicconfig/rollout.go · 27 LOCdynamicconfig/rollout.go

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Files with a broader (ancestor) concept 1

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Files with a narrower (descendant) concept 8

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1 package dynamicconfig
2
3 import (
4 "math"
5
6 "github.com/dgryski/go-farm"
7 )
8
9 // RolloutAccepts reports whether key falls within the given percentage [0,100]
10 // using a stable hash, so dialing the percent up is monotonic: a key accepted
11 // at percent P is accepted at every percent >= P.
12 //
13 // The hash algorithm and the bytes of key are a load-bearing rollout key:
14 // changing either re-shuffles every cohort and breaks monotonicity for
15 // in-flight rollouts. Callers are responsible for constructing key (including
16 // any separator bytes between fields) and must not change that construction
17 // once a rollout is in progress.
18 > func RolloutAccepts(key []byte, percent int) bool { rollout.go ×1
19 > if percent >= 100 {
20 > return true
21 > }
22 > if percent <= 0 { rollout.go ×1
23 > return false
24 > }
25 > threshold := uint32(float64(percent) / 100.0 * float64(math.MaxUint32)) rollout.go ×1
26 > return farm.Fingerprint32(key) < threshold
27 }