38 lines
942 B
Go
38 lines
942 B
Go
package accounting
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import (
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"context"
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"github.com/rclone/rclone/fs"
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"golang.org/x/time/rate"
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)
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var (
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tpsBucket *rate.Limiter // for limiting number of http transactions per second
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)
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// StartLimitTPS starts the token bucket for transactions per second
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// limiting if necessary
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func StartLimitTPS(ctx context.Context) {
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ci := fs.GetConfig(ctx)
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if ci.TPSLimit > 0 {
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tpsBurst := ci.TPSLimitBurst
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if tpsBurst < 1 {
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tpsBurst = 1
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}
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tpsBucket = rate.NewLimiter(rate.Limit(ci.TPSLimit), tpsBurst)
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fs.Infof(nil, "Starting transaction limiter: max %g transactions/s with burst %d", ci.TPSLimit, tpsBurst)
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}
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}
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// LimitTPS limits the number of transactions per second if enabled.
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// It should be called once per transaction.
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func LimitTPS(ctx context.Context) {
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if tpsBucket != nil {
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tbErr := tpsBucket.Wait(ctx)
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if tbErr != nil && tbErr != context.Canceled {
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fs.Errorf(nil, "HTTP token bucket error: %v", tbErr)
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}
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}
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}
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