7e5abd504f
Add three DBOS SDK skills with reference documentation for building reliable, fault-tolerant applications with durable workflows. Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>
53 lines
1.4 KiB
Markdown
53 lines
1.4 KiB
Markdown
---
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title: Use Durable Sleep for Delayed Execution
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impact: MEDIUM
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impactDescription: Enables reliable scheduling across restarts
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tags: pattern, sleep, delay, durable, schedule
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---
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## Use Durable Sleep for Delayed Execution
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Use `dbos.Sleep` for durable delays within workflows. The wakeup time is stored in the database, so the sleep survives restarts.
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**Incorrect (non-durable sleep):**
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```go
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func delayedTask(ctx dbos.DBOSContext, input string) (string, error) {
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// time.Sleep is not durable - lost on restart!
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time.Sleep(60 * time.Second)
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result, err := dbos.RunAsStep(ctx, doWork, dbos.WithStepName("doWork"))
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return result, err
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}
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```
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**Correct (durable sleep):**
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```go
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func delayedTask(ctx dbos.DBOSContext, input string) (string, error) {
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// Durable sleep - survives restarts
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_, err := dbos.Sleep(ctx, 60*time.Second)
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if err != nil {
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return "", err
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}
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result, err := dbos.RunAsStep(ctx, doWork, dbos.WithStepName("doWork"))
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return result, err
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}
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```
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`dbos.Sleep` takes a `time.Duration`. It returns the remaining sleep duration (zero if completed normally).
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Use cases:
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- Scheduling tasks to run in the future
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- Implementing retry delays
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- Delays spanning hours, days, or weeks
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```go
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func scheduledTask(ctx dbos.DBOSContext, task string) (string, error) {
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// Sleep for one week
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dbos.Sleep(ctx, 7*24*time.Hour)
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return processTask(task)
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}
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```
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Reference: [Durable Sleep](https://docs.dbos.dev/golang/tutorials/workflow-tutorial#durable-sleep)
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