WaitWithBackoff implements an exponential backoff strategy with jitter for retries. It waits for a calculated duration or until the context is cancelled, whichever comes first.
(ctx context.Context, tenantID string, retries int)
| 168 | // WaitWithBackoff implements an exponential backoff strategy with jitter for retries. |
| 169 | // It waits for a calculated duration or until the context is cancelled, whichever comes first. |
| 170 | func WaitWithBackoff(ctx context.Context, tenantID string, retries int) { |
| 171 | // Calculate the base backoff with bit shifting for better performance |
| 172 | baseBackoff := 20 * time.Millisecond |
| 173 | if retries > 0 { |
| 174 | // Use bit shifting instead of math.Pow for better performance |
| 175 | shift := min(retries, 5) // Cap at 2^5 = 32, so max backoff is 640ms |
| 176 | baseBackoff = baseBackoff << shift |
| 177 | } |
| 178 | |
| 179 | // Cap at 1 second |
| 180 | if baseBackoff > time.Second { |
| 181 | baseBackoff = time.Second |
| 182 | } |
| 183 | |
| 184 | // Generate jitter using crypto/rand |
| 185 | jitter := time.Duration(secureRandomFloat64() * float64(baseBackoff) * 0.5) |
| 186 | nextBackoff := baseBackoff + jitter |
| 187 | |
| 188 | // Log the retry wait |
| 189 | slog.WarnContext(ctx, "waiting before retry", |
| 190 | slog.String("tenant_id", tenantID), |
| 191 | slog.Int64("backoff_duration", nextBackoff.Milliseconds())) |
| 192 | |
| 193 | // Wait or exit on context cancellation |
| 194 | select { |
| 195 | case <-time.After(nextBackoff): |
| 196 | case <-ctx.Done(): |
| 197 | } |
| 198 | } |
| 199 | |
| 200 | // secureRandomFloat64 generates a float64 value in the range [0, 1) using crypto/rand. |
| 201 | // Optimized version with better error handling and performance. |
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