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[Jobs API] Describe Triggered Job Handling Assumptions #4376

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Expand Up @@ -94,6 +94,73 @@ In this example, at trigger time, which is `@every 1s` according to the `Schedul

At the trigger time, the `prodDBBackupHandler` function is called, executing the desired business logic for this job at trigger time. For example:

### Triggered Job Handling Assumptions

#### HTTP

When you create a job using Dapr's Jobs API, Dapr will automatically assume there is an endpoint available at
`/job/<job-name>`. For instance, if you schedule a job named `test`, Dapr expects your application to listen for job
events at `/job/test`. Ensure your application has a handler set up for this endpoint to process the job when it is
triggered. For example:

```go
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func main() {
...
http.HandleFunc("/job/", handleJob)
http.HandleFunc("/job/<job-name>", specificJob)
...
}

func specificJob(w http.ResponseWriter, r *http.Request) {
// Handle specific triggered job
}

func handleJob(w http.ResponseWriter, r *http.Request) {
// Handle the triggered jobs
}
```

#### gRPC

When a job reaches its scheduled trigger time, the triggered job is sent back to the application via the following
callback function:

```go
import rtv1 "github.com/dapr/dapr/pkg/proto/runtime/v1"
...
func (s *JobService) OnJobEventAlpha1(ctx context.Context, in *rtv1.JobEventRequest) (*rtv1.JobEventResponse, error) {
// Handle the triggered job
}
```

This function processes the triggered jobs within the context of your gRPC server. When you set up the server, ensure that
you register the callback server, which will invoke this function when a job is triggered:

```go
...
js := &JobService{}
rtv1.RegisterAppCallbackAlphaServer(server, js)
```

In this setup, you have full control over how triggered jobs are received and processed, as they are routed directly
through this gRPC method.

#### SDKs

For SDK users, handling triggered jobs is simpler. When a job is triggered, Dapr will automatically route the job to the
event handler you set up during the server initialization. For example, in Go, you'd register the event handler like this:

```go
...
if err = server.AddJobEventHandler("prod-db-backup", prodDBBackupHandler); err != nil {
log.Fatalf("failed to register job event handler: %v", err)
}
```

Dapr takes care of the underlying routing. When the job is triggered, your `prodDBBackupHandler` function is called with
the triggered job data. Here’s an example of handling the triggered job:

```go
// ...

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