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feat(x/metrics): add module for emiting custom chain metrics (#1668)
* initialize x/metrics with metrics collection * include global labels in x/metrics metrics * add x/metrics spec * add x/metrics test coverage * update changelog (cherry picked from commit 9a0aed7) # Conflicts: # CHANGELOG.md # app/app.go # go.mod
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,12 @@ | ||
| package metrics | ||
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| import ( | ||
| "github.com/kava-labs/kava/x/metrics/types" | ||
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| sdk "github.com/cosmos/cosmos-sdk/types" | ||
| ) | ||
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| // BeginBlocker publishes metrics at the start of each block. | ||
| func BeginBlocker(ctx sdk.Context, metrics *types.Metrics) { | ||
| metrics.LatestBlockHeight.Set(float64(ctx.BlockHeight())) | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,45 @@ | ||
| package metrics_test | ||
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| import ( | ||
| "testing" | ||
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| kitmetrics "github.com/go-kit/kit/metrics" | ||
| "github.com/stretchr/testify/require" | ||
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| sdk "github.com/cosmos/cosmos-sdk/types" | ||
| tmproto "github.com/tendermint/tendermint/proto/tendermint/types" | ||
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| "github.com/kava-labs/kava/app" | ||
| "github.com/kava-labs/kava/x/metrics" | ||
| "github.com/kava-labs/kava/x/metrics/types" | ||
| ) | ||
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| type MockGauge struct { | ||
| value float64 | ||
| } | ||
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| func (mg *MockGauge) With(labelValues ...string) kitmetrics.Gauge { return mg } | ||
| func (mg *MockGauge) Set(value float64) { mg.value = value } | ||
| func (*MockGauge) Add(_ float64) {} | ||
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| func ctxWithHeight(height int64) sdk.Context { | ||
| tApp := app.NewTestApp() | ||
| tApp.InitializeFromGenesisStates() | ||
| return tApp.NewContext(false, tmproto.Header{Height: height}) | ||
| } | ||
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| func TestBeginBlockEmitsLatestHeight(t *testing.T) { | ||
| gauge := MockGauge{} | ||
| myMetrics := &types.Metrics{ | ||
| LatestBlockHeight: &gauge, | ||
| } | ||
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| metrics.BeginBlocker(ctxWithHeight(1), myMetrics) | ||
| require.EqualValues(t, 1, gauge.value) | ||
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| metrics.BeginBlocker(ctxWithHeight(100), myMetrics) | ||
| require.EqualValues(t, 100, gauge.value) | ||
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| metrics.BeginBlocker(ctxWithHeight(17e6), myMetrics) | ||
| require.EqualValues(t, 17e6, gauge.value) | ||
| } |
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