[Jobs API] Describe Triggered Job Handling Assumptions (#4376)

* add specific logic for what assumptions are made for triggered jobs for http, grpc, sdks

Signed-off-by: Cassandra Coyle <[email protected]>

* rm space

Signed-off-by: Cassandra Coyle <[email protected]>

* add a note about this applying to all programming languages to avoid confusion

Signed-off-by: Cassandra Coyle <[email protected]>

* Update howto-schedule-and-handle-triggered-jobs.md

Signed-off-by: Yaron Schneider <[email protected]>

---------

Signed-off-by: Cassandra Coyle <[email protected]>
Signed-off-by: Yaron Schneider <[email protected]>
Co-authored-by: Yaron Schneider <[email protected]>

daprdocs/content/en/developing-applications/building-blocks/jobs/howto-schedule-and-handle-triggered-jobs.md

@@ -94,6 +94,75 @@ 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:
 
+#### 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:
+
+*Note: The following example is in Go but applies to any programming language.*
+
+```go
+
+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:
+
+*Note: The following example is in Go but applies to any programming language with gRPC support.*
+
+```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
 // ...
 
@@ -144,4 +213,4 @@ dapr run --app-id=distributed-scheduler \
 ## Next steps
 
 - [Learn more about the Scheduler control plane service]({{< ref "concepts/dapr-services/scheduler.md" >}})
-- [Jobs API reference]({{< ref jobs_api.md >}})
+- [Jobs API reference]({{< ref jobs_api.md >}})