|
| 1 | +package main |
| 2 | + |
| 3 | +import ( |
| 4 | + "context" |
| 5 | + "fmt" |
| 6 | + "log" |
| 7 | + "sync" |
| 8 | + "sync/atomic" |
| 9 | + "time" |
| 10 | + |
| 11 | + "github.com/dapr/go-sdk/workflow" |
| 12 | +) |
| 13 | + |
| 14 | +func main() { |
| 15 | + w, err := workflow.NewWorker() |
| 16 | + if err != nil { |
| 17 | + log.Fatalf("failed to initialise worker: %v", err) |
| 18 | + } |
| 19 | + |
| 20 | + if err := w.RegisterWorkflow(TaskExecutionIdWorkflow); err != nil { |
| 21 | + log.Fatalf("failed to register workflow: %v", err) |
| 22 | + } |
| 23 | + if err := w.RegisterActivity(RetryN); err != nil { |
| 24 | + log.Fatalf("failed to register activity: %v", err) |
| 25 | + } |
| 26 | + fmt.Println("Workflow(s) and activities registered.") |
| 27 | + |
| 28 | + if err := w.Start(); err != nil { |
| 29 | + log.Fatalf("failed to start worker") |
| 30 | + } |
| 31 | + |
| 32 | + wfClient, err := workflow.NewClient() |
| 33 | + if err != nil { |
| 34 | + log.Fatalf("failed to initialise client: %v", err) |
| 35 | + } |
| 36 | + ctx := context.Background() |
| 37 | + id, err := wfClient.ScheduleNewWorkflow(ctx, "TaskExecutionIdWorkflow", workflow.WithInput(5)) |
| 38 | + if err != nil { |
| 39 | + log.Fatalf("failed to schedule a new workflow: %v", err) |
| 40 | + } |
| 41 | + |
| 42 | + metadata, err := wfClient.WaitForWorkflowCompletion(ctx, id) |
| 43 | + if err != nil { |
| 44 | + log.Fatalf("failed to get workflow: %v", err) |
| 45 | + } |
| 46 | + fmt.Printf("workflow status: %s\n", metadata.RuntimeStatus.String()) |
| 47 | + |
| 48 | + err = wfClient.TerminateWorkflow(ctx, id) |
| 49 | + if err != nil { |
| 50 | + log.Fatalf("failed to terminate workflow: %v", err) |
| 51 | + } |
| 52 | + fmt.Println("workflow terminated") |
| 53 | + |
| 54 | + err = wfClient.PurgeWorkflow(ctx, id) |
| 55 | + if err != nil { |
| 56 | + log.Fatalf("failed to purge workflow: %v", err) |
| 57 | + } |
| 58 | + fmt.Println("workflow purged") |
| 59 | +} |
| 60 | + |
| 61 | +var eMap = sync.Map{} |
| 62 | + |
| 63 | +func TaskExecutionIdWorkflow(ctx *workflow.WorkflowContext) (any, error) { |
| 64 | + var retries int |
| 65 | + if err := ctx.GetInput(&retries); err != nil { |
| 66 | + return 0, err |
| 67 | + } |
| 68 | + |
| 69 | + var workBatch []int |
| 70 | + if err := ctx.CallActivity(RetryN, workflow.ActivityRetryPolicy(workflow.RetryPolicy{ |
| 71 | + MaxAttempts: retries, |
| 72 | + InitialRetryInterval: 100 * time.Millisecond, |
| 73 | + BackoffCoefficient: 2, |
| 74 | + MaxRetryInterval: 1 * time.Second, |
| 75 | + }), workflow.ActivityInput(retries)).Await(&workBatch); err != nil { |
| 76 | + return 0, err |
| 77 | + } |
| 78 | + |
| 79 | + if err := ctx.CallActivity(RetryN, workflow.ActivityRetryPolicy(workflow.RetryPolicy{ |
| 80 | + MaxAttempts: retries, |
| 81 | + InitialRetryInterval: 100 * time.Millisecond, |
| 82 | + BackoffCoefficient: 2, |
| 83 | + MaxRetryInterval: 1 * time.Second, |
| 84 | + }), workflow.ActivityInput(retries)).Await(&workBatch); err != nil { |
| 85 | + return 0, err |
| 86 | + } |
| 87 | + |
| 88 | + return 0, nil |
| 89 | +} |
| 90 | + |
| 91 | +func RetryN(ctx workflow.ActivityContext) (any, error) { |
| 92 | + taskExecutionID := ctx.GetTaskExecutionID() |
| 93 | + counter, _ := eMap.LoadOrStore(taskExecutionID, &atomic.Int32{}) |
| 94 | + var retries int32 |
| 95 | + if err := ctx.GetInput(&retries); err != nil { |
| 96 | + return 0, err |
| 97 | + } |
| 98 | + |
| 99 | + counter.(*atomic.Int32).Add(1) |
| 100 | + fmt.Println("RetryN ", counter.(*atomic.Int32).Load()) |
| 101 | + |
| 102 | + if counter.(*atomic.Int32).Load() < retries-1 { |
| 103 | + return nil, fmt.Errorf("failed") |
| 104 | + } |
| 105 | + |
| 106 | + return nil, nil |
| 107 | + |
| 108 | +} |
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