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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,76 @@ | ||
| package pipeline | ||
|
|
||
| import ( | ||
| "context" | ||
| "time" | ||
|
|
||
| "github.com/cenkalti/backoff/v4" | ||
| ) | ||
|
|
||
| type RetriableBatcher struct { | ||
| outFn RetriableBatcherOutFn | ||
| backoff backoff.BackOff | ||
| batcher *Batcher | ||
| onRetryError func(err error) | ||
| } | ||
|
|
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| type RetriableBatcherOutFn func(*WorkerData, *Batch) error | ||
|
|
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| type BackoffOpts struct { | ||
| MinRetention time.Duration | ||
| Multiplier float64 | ||
| AttemptNum uint64 | ||
| } | ||
|
|
||
| func NewRetriableBatcher(batcherOpts *BatcherOptions, batcherOutFn RetriableBatcherOutFn, opts BackoffOpts, onError func(err error)) *RetriableBatcher { | ||
| boff := GetBackoff( | ||
| opts.MinRetention, | ||
| opts.Multiplier, | ||
| opts.AttemptNum, | ||
| ) | ||
|
|
||
| batcherBackoff := &RetriableBatcher{ | ||
| outFn: batcherOutFn, | ||
| backoff: boff, | ||
| onRetryError: onError, | ||
| } | ||
| batcherBackoff.setBatcher(batcherOpts) | ||
| return batcherBackoff | ||
| } | ||
|
|
||
| func (b *RetriableBatcher) setBatcher(batcherOpts *BatcherOptions) { | ||
| batcherOpts.OutFn = b.Out | ||
| b.batcher = NewBatcher(*batcherOpts) | ||
| } | ||
|
|
||
| func (b *RetriableBatcher) Out(data *WorkerData, batch *Batch) { | ||
| b.backoff.Reset() | ||
|
|
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| err := backoff.Retry(func() error { | ||
| return b.outFn(data, batch) | ||
| }, b.backoff) | ||
|
|
||
| if err != nil { | ||
| b.onRetryError(err) | ||
| } | ||
| } | ||
|
|
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| func (b *RetriableBatcher) Start(ctx context.Context) { | ||
| b.batcher.Start(ctx) | ||
| } | ||
|
|
||
| func (b *RetriableBatcher) Stop() { | ||
| b.batcher.Stop() | ||
| } | ||
|
|
||
| func (b *RetriableBatcher) Add(event *Event) { | ||
| b.batcher.Add(event) | ||
| } | ||
|
|
||
| func GetBackoff(minRetention time.Duration, multiplier float64, attemptNum uint64) backoff.BackOff { | ||
| expBackoff := backoff.NewExponentialBackOff() | ||
| expBackoff.InitialInterval = minRetention | ||
| expBackoff.Multiplier = multiplier | ||
| expBackoff.RandomizationFactor = 0.5 | ||
| return backoff.WithMaxRetries(expBackoff, attemptNum) | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,62 @@ | ||
| package pipeline | ||
|
|
||
| import ( | ||
| "errors" | ||
| "testing" | ||
|
|
||
| "github.com/ozontech/file.d/metric" | ||
| "github.com/prometheus/client_golang/prometheus" | ||
| "github.com/stretchr/testify/assert" | ||
| "go.uber.org/atomic" | ||
| ) | ||
|
|
||
| func TestBackoff(t *testing.T) { | ||
| errorCount := &atomic.Int32{} | ||
| errorCountBefore := errorCount.Load() | ||
|
|
||
| eventCount := &atomic.Int32{} | ||
| eventCountBefore := eventCount.Load() | ||
|
|
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| errorFn := func(err error) { | ||
| errorCount.Inc() | ||
| } | ||
|
|
||
| batcherBackoff := NewRetriableBatcher( | ||
| &BatcherOptions{ | ||
| MetricCtl: metric.NewCtl("", prometheus.NewRegistry()), | ||
| }, | ||
| func(workerData *WorkerData, batch *Batch) error { | ||
| eventCount.Inc() | ||
| return nil | ||
| }, | ||
| BackoffOpts{AttemptNum: 3}, | ||
| errorFn, | ||
| ) | ||
|
|
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| batcherBackoff.Out(nil, nil) | ||
|
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| assert.Equal(t, errorCountBefore, errorCount.Load(), "wrong error count") | ||
| assert.Equal(t, eventCountBefore+1, eventCount.Load(), "wrong event count") | ||
| } | ||
|
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||
| func TestBackoffWithError(t *testing.T) { | ||
| errorCount := &atomic.Int32{} | ||
| prevValue := errorCount.Load() | ||
| errorFn := func(err error) { | ||
| errorCount.Inc() | ||
| } | ||
|
|
||
| batcherBackoff := NewRetriableBatcher( | ||
| &BatcherOptions{ | ||
| MetricCtl: metric.NewCtl("", prometheus.NewRegistry()), | ||
| }, | ||
| func(workerData *WorkerData, batch *Batch) error { | ||
| return errors.New("some error") | ||
| }, | ||
| BackoffOpts{AttemptNum: 3}, | ||
| errorFn, | ||
| ) | ||
|
|
||
| batcherBackoff.Out(nil, nil) | ||
| assert.Equal(t, prevValue+1, errorCount.Load(), "wrong error count") | ||
| } |
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