Funkce orchestratoru můžou volat jiné funkce orchestrátoru jako dílčí orchestrace. Dílčí orchestrace se spouští jako podřízený orchestrátor volání (nadřazený) a chová se jako aktivita z pohledu volajícího: může vrátit hodnotu, vyvolat výjimky zachycené nadřazeným objektem a podporovat automatické opakování.
Kdy použít dílčí orchestrace
Pokud potřebujete, použijte dílčí orchestrace:
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Vytváření opakovaně použitelných stavebních bloků pracovního postupu: Extrahujte vícekrokový pracovní postup do vlastního orchestrátoru, aby ho mohlo volat více nadřazených orchestrací.
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Paralelní spuštění orchestrací: Naplánujte mnoho instancí stejných orchestrátorů současně a vyčkejte, než se všechny dokončí.
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Uspořádání složitých pracovních postupů: Rozdělte velkou orchestraci na pojmenované testovatelné části místo jedné dlouhé funkce.
Poznámka:
Podřízené orchestrace musí být definovány ve stejné aplikaci jako nadřazená orchestrace. Pokud chcete volat orchestrace v jiné aplikaci, namísto toho použijte vzor dotazování HTTP 202. Další informace najdete v tématu Funkce HTTP.
V tomto článku:
Definování dílčí orchestrace
Následující příklad znázorňuje scénář IoT, ve kterém je potřeba nastavit více zařízení. Funkce představuje pracovní postup nastavení, který se spouští pro každé zařízení:
Izolovaný model pracovního procesu
public static async Task DeviceProvisioningOrchestration(
[OrchestrationTrigger] TaskOrchestrationContext context, string deviceId)
{
// Step 1: Create an installation package in blob storage and return a SAS URL.
Uri sasUrl = await context.CallActivityAsync<Uri>("CreateInstallationPackage", deviceId);
// Step 2: Notify the device that the installation package is ready.
await context.CallActivityAsync("SendPackageUrlToDevice", (deviceId, sasUrl));
// Step 3: Wait for the device to acknowledge that it has downloaded the new package.
await context.WaitForExternalEvent<bool>("DownloadCompletedAck");
// Step 4: ...
}
Model v probíhajícím procesu
public static async Task DeviceProvisioningOrchestration(
[OrchestrationTrigger] IDurableOrchestrationContext context)
{
string deviceId = context.GetInput<string>();
// Step 1: Create an installation package in blob storage and return a SAS URL.
Uri sasUrl = await context.CallActivityAsync<Uri>("CreateInstallationPackage", deviceId);
// Step 2: Notify the device that the installation package is ready.
await context.CallActivityAsync("SendPackageUrlToDevice", Tuple.Create(deviceId, sasUrl));
// Step 3: Wait for the device to acknowledge that it has downloaded the new package.
await context.WaitForExternalEvent<bool>("DownloadCompletedAck");
// Step 4: ...
}
const df = require("durable-functions");
df.app.orchestration("deviceProvisioningOrchestration", function* (context) {
const deviceId = context.df.getInput();
// Step 1: Create an installation package in blob storage and return a SAS URL.
const sasUrl = yield context.df.callActivity("createInstallationPackage", deviceId);
// Step 2: Notify the device that the installation package is ready.
yield context.df.callActivity("sendPackageUrlToDevice", { id: deviceId, url: sasUrl });
// Step 3: Wait for the device to acknowledge that it has downloaded the new package.
yield context.df.waitForExternalEvent("downloadCompletedAck");
// Step 4: ...
});
import azure.functions as func
import azure.durable_functions as df
def orchestrator_function(context: df.DurableOrchestrationContext):
device_id = context.get_input()
# Step 1: Create an installation package in blob storage and return a SAS URL.
sas_url = yield context.call_activity("CreateInstallationPackage", device_id)
# Step 2: Notify the device that the installation package is ready.
yield context.call_activity("SendPackageUrlToDevice", { "id": device_id, "url": sas_url })
# Step 3: Wait for the device to acknowledge that it has downloaded the new package.
yield context.call_activity("DownloadCompletedAck")
# Step 4: ...
param($Context)
$deviceId = $Context.Input
# Step 1: Create an installation package in blob storage and return a SAS URL.
$sasUrl = Invoke-DurableActivity -FunctionName "CreateInstallationPackage" -Input $deviceId
# Step 2: Notify the device that the installation package is ready.
$deviceInfo = @{
id = $deviceId
url = $sasUrl
}
Invoke-DurableActivity -FunctionName "SendPackageUrlToDevice" -Input $deviceInfo
# Step 3: Wait for the device to acknowledge that it has downloaded the new package.
Start-DurableExternalEventListener -EventName "DownloadCompletedAck"
# Step 4: ...
@FunctionName("DeviceProvisioningOrchestration")
public void deviceProvisioningOrchestration(
@DurableOrchestrationTrigger(name = "ctx") TaskOrchestrationContext ctx) {
// Step 1: Create an installation package in blob storage and return a SAS URL.
String deviceId = ctx.getInput(String.class);
String blobUri = ctx.callActivity("CreateInstallPackage", deviceId, String.class).await();
// Step 2: Notify the device that the installation package is ready.
String[] args = { deviceId, blobUri };
ctx.callActivity("SendPackageUrlToDevice", args).await();
// Step 3: Wait for the device to acknowledge that it has downloaded the new package.
ctx.waitForExternalEvent("DownloadCompletedAck").await();
// Step 4: ...
}
using Microsoft.DurableTask;
[DurableTask]
public class DeviceProvisioningOrchestration : TaskOrchestrator<string, object?>
{
public override async Task<object?> RunAsync(TaskOrchestrationContext context, string deviceId)
{
// Step 1: Create an installation package in blob storage and return a SAS URL.
Uri sasUrl = await context.CallActivityAsync<Uri>("CreateInstallationPackage", deviceId);
// Step 2: Notify the device that the installation package is ready.
await context.CallActivityAsync("SendPackageUrlToDevice", (deviceId, sasUrl.ToString()));
// Step 3: Wait for the device to acknowledge that it has downloaded the new package.
await context.WaitForExternalEvent<bool>("DownloadCompletedAck");
// Step 4: ...
return null;
}
}
import { OrchestrationContext, TOrchestrator } from "@microsoft/durabletask-js";
const deviceProvisioningOrchestrator: TOrchestrator = async function* (
ctx: OrchestrationContext,
deviceId: string
): any {
// Step 1: Create an installation package in blob storage and return a SAS URL.
const sasUrl: string = yield ctx.callActivity(createInstallationPackage, deviceId);
// Step 2: Notify the device that the installation package is ready.
yield ctx.callActivity(sendPackageUrlToDevice, { id: deviceId, url: sasUrl });
// Step 3: Wait for the device to acknowledge that it has downloaded the new package.
yield ctx.waitForExternalEvent("DownloadCompletedAck");
// Step 4: ...
};
from durabletask import task
def device_provisioning_orchestrator(ctx: task.OrchestrationContext, device_id: str):
# Step 1: Create an installation package in blob storage and return a SAS URL.
sas_url = yield ctx.call_activity("create_installation_package", input=device_id)
# Step 2: Notify the device that the installation package is ready.
yield ctx.call_activity("send_package_url_to_device", input={"id": device_id, "url": sas_url})
# Step 3: Wait for the device to acknowledge that it has downloaded the new package.
yield ctx.wait_for_external_event("DownloadCompletedAck")
# Step 4: ...
Tato ukázka se zobrazuje pro .NET, JavaScript, Java a Python.
import com.microsoft.durabletask.TaskOrchestration;
import com.microsoft.durabletask.TaskOrchestrationContext;
public class DeviceProvisioningOrchestration implements TaskOrchestration {
@Override
public void run(TaskOrchestrationContext ctx) {
String deviceId = ctx.getInput(String.class);
// Step 1: Create an installation package in blob storage and return a SAS URL.
String blobUri = ctx.callActivity("CreateInstallPackage", deviceId, String.class).await();
// Step 2: Notify the device that the installation package is ready.
String[] args = { deviceId, blobUri };
ctx.callActivity("SendPackageUrlToDevice", args).await();
// Step 3: Wait for the device to acknowledge that it has downloaded the new package.
ctx.waitForExternalEvent("DownloadCompletedAck").await();
// Step 4: ...
}
}
Tato funkce orchestrátoru může běžet samostatně pro jednorázové nastavení zařízení, nebo ji může nadřazený orchestrátor naplánovat jako dílčí orchestraci pomocí API call-sub-orchestrator.
Paralelní spouštění dílčích orchestrací
Následující příklad ukazuje nadřazený orchestrátor, který paralelně rozvětvuje více pod-orchestrací. Některé jazyky používají deterministické ID podřízené instance (odvozené z ID instance nadřazeného objektu plus index), aby se zabránilo duplicitním dílčím orchestracím při opětovném přehrávání.
Izolovaný model pracovního procesu
[Function("ProvisionNewDevices")]
public static async Task ProvisionNewDevices(
[OrchestrationTrigger] TaskOrchestrationContext context)
{
string[] deviceIds = await context.CallActivityAsync<string[]>("GetNewDeviceIds");
// Run multiple device provisioning flows in parallel
var provisioningTasks = new List<Task>();
foreach (string deviceId in deviceIds)
{
Task provisionTask = context.CallSubOrchestratorAsync("DeviceProvisioningOrchestration", deviceId);
provisioningTasks.Add(provisionTask);
}
await Task.WhenAll(provisioningTasks);
// ...
}
Model v probíhajícím procesu
[FunctionName("ProvisionNewDevices")]
public static async Task ProvisionNewDevices(
[OrchestrationTrigger] IDurableOrchestrationContext context)
{
string[] deviceIds = await context.CallActivityAsync<string[]>("GetNewDeviceIds");
// Run multiple device provisioning flows in parallel
var provisioningTasks = new List<Task>();
foreach (string deviceId in deviceIds)
{
Task provisionTask = context.CallSubOrchestratorAsync("DeviceProvisioningOrchestration", deviceId);
provisioningTasks.Add(provisionTask);
}
await Task.WhenAll(provisioningTasks);
// ...
}
const df = require("durable-functions");
df.app.orchestration("provisionNewDevices", function* (context) {
const deviceIds = yield context.df.callActivity("getNewDeviceIds");
// Run multiple device provisioning flows in parallel
const provisioningTasks = [];
var id = 0;
for (const deviceId of deviceIds) {
const child_id = context.df.instanceId + `:${id}`;
const provisionTask = context.df.callSubOrchestrator(
"deviceProvisioningOrchestration",
deviceId,
child_id
);
provisioningTasks.push(provisionTask);
id++;
}
yield context.df.Task.all(provisioningTasks);
// ...
});
import azure.functions as func
import azure.durable_functions as df
def orchestrator_function(context: df.DurableOrchestrationContext):
device_IDs = yield context.call_activity("GetNewDeviceIds")
# Run multiple device provisioning flows in parallel
provisioning_tasks = []
id_ = 0
for device_id in device_IDs:
child_id = f"{context.instance_id}:{id_}"
provision_task = context.call_sub_orchestrator("DeviceProvisioningOrchestration", device_id, child_id)
provisioning_tasks.append(provision_task)
id_ += 1
yield context.task_all(provisioning_tasks)
# ...
param($Context)
$deviceIds = Invoke-DurableActivity -FunctionName "GetNewDeviceIds"
# Run multiple device setting up flows in parallel
$provisioningTasks = @()
for ($i = 0; $i -lt $deviceIds.Count; $i++) {
$deviceId = $deviceIds[$i]
$childId = "$($Context.InstanceId):$i"
$provisionTask = Invoke-DurableSubOrchestrator `
-FunctionName "DeviceProvisioningOrchestration" `
-Input $deviceId `
-InstanceId $childId `
-NoWait
$provisioningTasks += $provisionTask
}
Wait-DurableTask -Task $provisioningTasks
# ...
@FunctionName("ProvisionNewDevices")
public void provisionNewDevices(
@DurableOrchestrationTrigger(name = "ctx") TaskOrchestrationContext ctx) {
List<?> deviceIDs = ctx.getInput(List.class);
// Schedule each device provisioning sub-orchestration to run in parallel
List<Task<Void>> parallelTasks = deviceIDs.stream()
.map(device -> ctx.callSubOrchestrator("DeviceProvisioningOrchestration", device))
.collect(Collectors.toList());
// ...
}
Další kroky
using Microsoft.DurableTask;
[DurableTask]
public class ProvisionNewDevices : TaskOrchestrator<object?, object?>
{
public override async Task<object?> RunAsync(TaskOrchestrationContext context, object? input)
{
string[] deviceIds = await context.CallActivityAsync<string[]>("GetNewDeviceIds");
// Run multiple device provisioning flows in parallel
var provisioningTasks = new List<Task>();
foreach (string deviceId in deviceIds)
{
Task provisionTask = context.CallSubOrchestratorAsync("DeviceProvisioningOrchestration", deviceId);
provisioningTasks.Add(provisionTask);
}
await Task.WhenAll(provisioningTasks);
return null;
}
}
import { OrchestrationContext, TOrchestrator, whenAll } from "@microsoft/durabletask-js";
const provisionNewDevices: TOrchestrator = async function* (ctx: OrchestrationContext): any {
const deviceIds: string[] = yield ctx.callActivity(getNewDeviceIds);
// Run multiple device provisioning flows in parallel
const provisioningTasks = deviceIds.map((deviceId: string) =>
ctx.callSubOrchestrator(deviceProvisioningOrchestrator, deviceId)
);
yield whenAll(provisioningTasks);
};
from durabletask import task
def provision_new_devices(ctx: task.OrchestrationContext, _):
device_ids = yield ctx.call_activity("get_new_device_ids")
# Run multiple device provisioning flows in parallel
provisioning_tasks = []
for device_id in device_ids:
provision_task = ctx.call_sub_orchestrator(device_provisioning_orchestrator, input=device_id)
provisioning_tasks.append(provision_task)
yield task.when_all(provisioning_tasks)
Tato ukázka se zobrazuje pro .NET, JavaScript, Java a Python.
import com.microsoft.durabletask.TaskOrchestration;
import com.microsoft.durabletask.TaskOrchestrationContext;
public class ProvisionNewDevices implements TaskOrchestration {
@Override
public void run(TaskOrchestrationContext ctx) {
List<?> deviceIDs = ctx.getInput(List.class);
// Schedule each device provisioning sub-orchestration to run in parallel
List<Task<Void>> parallelTasks = deviceIDs.stream()
.map(device -> ctx.callSubOrchestrator("DeviceProvisioningOrchestration", device))
.collect(Collectors.toList());
ctx.allOf(parallelTasks).await();
}
}
Další kroky