add more pattern examples

Signed-off-by: Hannah Hunter <hannahhunter@microsoft.com>
This commit is contained in:
Hannah Hunter 2024-02-14 14:15:47 -05:00
parent c3a2b69a99
commit 6d9a344d36
1 changed files with 117 additions and 3 deletions

View File

@ -786,7 +786,51 @@ public class MonitorWorkflow extends Workflow {
<!--go-->
```go
type JobStatus struct {
JobID string `json:"job_id"`
IsHealthy bool `json:"is_healthy"`
}
func StatusMonitorWorkflow(ctx *workflow.WorkflowContext) (any, error) {
var sleepInterval time.Duration
var job JobStatus
if err := ctx.GetInput(&job); err != nil {
return "", err
}
var status string
if err := ctx.CallActivity(CheckStatus, workflow.ActivityInput(job)).Await(&status); err != nil {
return "", err
}
if status == "healthy" {
job.IsHealthy = true
sleepInterval = time.Second * 60
} else {
if job.IsHealthy {
job.IsHealthy = false
err := ctx.CallActivity(SendAlert, workflow.ActivityInput(fmt.Sprintf("Job '%s' is unhealthy!", job.JobID))).Await(nil)
if err != nil {
return "", err
}
}
sleepInterval = time.Second * 5
}
if err := ctx.CreateTimer(sleepInterval).Await(nil); err != nil {
return "", err
}
ctx.ContinueAsNew(job, false)
return "", nil
}
func CheckStatus(ctx workflow.ActivityContext) (any, error) {
statuses := []string{"healthy", "unhealthy"}
return statuses[rand.Intn(1)], nil
}
func SendAlert(ctx workflow.ActivityContext) (any, error) {
var message string
if err := ctx.GetInput(&message); err != nil {
return "", err
}
fmt.Printf("*** Alert: %s", message)
return "", nil
}
```
{{% /codetab %}}
@ -1105,7 +1149,55 @@ public class ExternalSystemInteractionWorkflow extends Workflow {
<!--go-->
```go
type Order struct {
Cost float64 `json:"cost"`
Product string `json:"product"`
Quantity int `json:"quantity"`
}
type Approval struct {
Approver string `json:"approver"`
}
func PurchaseOrderWorkflow(ctx *workflow.WorkflowContext) (any, error) {
var order Order
if err := ctx.GetInput(&order); err != nil {
return "", err
}
// Orders under $1000 are auto-approved
if order.Cost < 1000 {
return "Auto-approved", nil
}
// Orders of $1000 or more require manager approval
if err := ctx.CallActivity(SendApprovalRequest, workflow.ActivityInput(order)).Await(nil); err != nil {
return "", err
}
// Approvals must be received within 24 hours or they will be cancelled
var approval Approval
if err := ctx.WaitForExternalEvent("approval_received", time.Hour*24).Await(&approval); err != nil {
// Assuming that a timeout has taken place - in any case; an error.
return "error/cancelled", err
}
// The order was approved
if err := ctx.CallActivity(PlaceOrder, workflow.ActivityInput(order)).Await(nil); err != nil {
return "", err
}
return fmt.Sprintf("Approved by %s", approval.Approver), nil
}
func SendApprovalRequest(ctx workflow.ActivityContext) (any, error) {
var order Order
if err := ctx.GetInput(&order); err != nil {
return "", err
}
fmt.Printf("*** Sending approval request for order: %v\n", order)
return "", nil
}
func PlaceOrder(ctx workflow.ActivityContext) (any, error) {
var order Order
if err := ctx.GetInput(&order); err != nil {
return "", err
}
fmt.Printf("*** Placing order: %v", order)
return "", nil
}
```
{{% /codetab %}}
@ -1137,7 +1229,11 @@ with DaprClient() as d:
<!--javascript-->
```javascript
// Raise the workflow event to the waiting workflow
import { DaprClient } from "@dapr/dapr";
public async raiseEvent(workflowInstanceId: string, eventName: string, eventPayload?: any) {
this._innerClient.raiseOrchestrationEvent(workflowInstanceId, eventName, eventPayload);
}
```
{{% /codetab %}}
@ -1170,6 +1266,24 @@ client.raiseEvent(restartingInstanceId, "RestartEvent", "RestartEventPayload");
<!--go-->
```go
func raiseEvent() {
daprClient, err := client.NewClient()
if err != nil {
log.Fatalf("failed to initialize the client")
}
err = daprClient.RaiseEventWorkflowBeta1(context.Background(), &client.RaiseEventWorkflowRequest{
InstanceID: "instance_id",
WorkflowComponent: "dapr",
EventName: "approval_received",
EventData: Approval{
Approver: "Jane Doe",
},
})
if err != nil {
log.Fatalf("failed to raise event on workflow")
}
log.Println("raised an event on specified workflow")
}
```
{{% /codetab %}}