Add DTS preview support for Create Function and remove Netherite from list of new storage options

src/commands/createFunction/IFunctionWizardContext.ts

@@ -4,7 +4,7 @@
  *--------------------------------------------------------------------------------------------*/
 
 import { type ExecuteActivityContext, type ISubscriptionContext } from "@microsoft/vscode-azext-utils";
-import { type DurableBackendValues } from "../../constants";
+import { type DurableBackend } from "../../constants";
 import { type BindingSettingValue } from "../../funcConfig/function";
 import { type IBindingSetting } from "../../templates/IBindingTemplate";
 import { type FunctionTemplateBase } from "../../templates/IFunctionTemplate";
@@ -17,7 +17,7 @@ export interface IFunctionWizardContext extends Partial<ISubscriptionContext>, I
 
     // Durable Functions
     hasDurableStorage?: boolean;
-    newDurableStorageType?: DurableBackendValues;
+    newDurableStorageType?: DurableBackend;
 
     useStorageEmulator?: boolean;
 }

src/commands/createFunction/durableSteps/DurableProjectConfigureStep.ts

@@ -6,7 +6,7 @@
 import { AzExtFsExtra, AzureWizardExecuteStepWithActivityOutput } from '@microsoft/vscode-azext-utils';
 import * as path from "path";
 import { type Progress } from 'vscode';
-import { ConnectionKey, DurableBackend, hostFileName } from '../../../constants';
+import { ConnectionKey, DurableBackend, hostFileName, ProjectLanguage } from '../../../constants';
 import { viewOutput } from '../../../constants-nls';
 import { ext } from '../../../extensionVariables';
 import { type IHostJsonV2 } from '../../../funcConfig/host';
@@ -72,6 +72,19 @@ export class DurableProjectConfigureStep<T extends IFunctionWizardContext> exten
                 hostJson.extensions.durableTask = durableUtils.getDefaultNetheriteTaskConfig();
                 await setLocalAppSetting(context, context.projectPath, ConnectionKey.EventHubs, '', MismatchBehavior.Overwrite);
                 break;
+            case DurableBackend.DTS:
+                hostJson.extensions.durableTask = durableUtils.getDefaultDTSTaskConfig();
+                // Non- .NET projects require a special preview extension bundle to work properly
+                // Todo: Remove once this functionality is out of preview
+                if (context.language !== ProjectLanguage.CSharp && context.language !== ProjectLanguage.FSharp) {
+                    hostJson.extensionBundle = {
+                        id: 'Microsoft.Azure.Functions.ExtensionBundle.Preview',
+                        version: '[4.29.0, 5.0.0)',
+                    };
+                }
+                await setLocalAppSetting(context, context.projectPath, ConnectionKey.DTS, '', MismatchBehavior.Overwrite);
+                await setLocalAppSetting(context, context.projectPath, ConnectionKey.DTSHub, 'default', MismatchBehavior.Overwrite);
+                break;
             case DurableBackend.SQL:
                 hostJson.extensions.durableTask = durableUtils.getDefaultSqlTaskConfig();
                 await setLocalAppSetting(context, context.projectPath, ConnectionKey.SQL, '', MismatchBehavior.Overwrite);

src/commands/createFunction/durableSteps/DurableStorageTypePromptStep.ts

@@ -5,7 +5,7 @@
 
 import { AzureWizardPromptStep, openUrl, type IAzureQuickPickItem, type IWizardOptions } from "@microsoft/vscode-azext-utils";
 import { DurableBackend, type DurableBackendValues } from "../../../constants";
-import { defaultDescription } from "../../../constants-nls";
+import { defaultDescription, previewDescription } from "../../../constants-nls";
 import { localize } from "../../../localize";
 import { FunctionSubWizard } from "../FunctionSubWizard";
 import { type IFunctionWizardContext } from "../IFunctionWizardContext";
@@ -19,24 +19,19 @@ export class DurableStorageTypePromptStep<T extends IFunctionWizardContext> exte
     }
 
     public async prompt(context: T): Promise<void> {
-        const durableStorageLabels: string[] = [
-            'Azure Storage',
-            'Netherite',
-            'MSSQL'
-        ];
         const durableStorageInfo: string = localize('durableStorageInfo', '$(link-external)  Learn more about the tradeoffs between storage providers');
 
         const placeHolder: string = localize('chooseDurableStorageType', 'Choose a durable storage type.');
         const picks: IAzureQuickPickItem<DurableBackendValues | undefined>[] = [
-            { label: durableStorageLabels[0], description: defaultDescription, data: DurableBackend.Storage, suppressPersistence: true },
-            { label: durableStorageLabels[1], data: DurableBackend.Netherite, suppressPersistence: true },
-            { label: durableStorageLabels[2], data: DurableBackend.SQL, suppressPersistence: true },
-            { label: durableStorageInfo, data: undefined, suppressPersistence: true }
+            { label: 'Azure Storage', description: defaultDescription, data: DurableBackend.Storage },
+            { label: 'Durable Task Scheduler', description: previewDescription, data: DurableBackend.DTS },
+            { label: 'MSSQL', data: DurableBackend.SQL },
+            { label: durableStorageInfo, data: undefined }
         ];
 
         let pick: DurableBackendValues | undefined;
         while (!pick) {
-            pick = (await context.ui.showQuickPick(picks, { placeHolder })).data;
+            pick = (await context.ui.showQuickPick(picks, { placeHolder, suppressPersistence: true })).data;
             if (!pick) {
                 await openUrl('https://aka.ms/durable-storage-providers');
             }

src/constants.ts

@@ -99,6 +99,8 @@ export enum ConnectionKey {
     Storage = 'AzureWebJobsStorage',
     StorageIdentity = 'AzureWebJobsStorage__accountName',
     EventHubs = 'EventHubsConnection',
+    DTS = 'DURABLE_TASK_SCHEDULER_CONNECTION_STRING',
+    DTSHub = 'TASKHUB_NAME',
     SQL = 'SQLDB_Connection'
 }
 
@@ -120,7 +122,8 @@ export enum ConnectionType {
 export enum DurableBackend {
     Storage = 'AzureStorage',
     Netherite = 'Netherite',
-    SQL = "mssql"
+    DTS = 'azureManaged',
+    SQL = 'mssql',
 }
 
 export type ConnectionTypeValues = typeof ConnectionType[keyof typeof ConnectionType];

src/funcConfig/host.ts

@@ -34,7 +34,7 @@ export interface IHostJsonV2 {
     };
 }
 
-export type IDurableTaskJson = IStorageTaskJson | INetheriteTaskJson | ISqlTaskJson;
+export type IDurableTaskJson = IStorageTaskJson | INetheriteTaskJson | IDTSTaskJson | ISqlTaskJson;
 
 export interface IStorageTaskJson {
     storageProvider?: {
@@ -53,6 +53,14 @@ export interface INetheriteTaskJson {
     }
 }
 
+export interface IDTSTaskJson {
+    hubName?: string;
+    storageProvider?: {
+        type?: DurableBackend.DTS;
+        connectionStringName?: string;
+    }
+}
+
 export interface ISqlTaskJson {
     storageProvider?: {
         type?: DurableBackend.SQL;

src/utils/durableUtils.ts

@@ -10,7 +10,7 @@ import * as xml2js from "xml2js";
 import { type IFunctionWizardContext } from "../commands/createFunction/IFunctionWizardContext";
 import { ConnectionKey, DurableBackend, ProjectLanguage, hostFileName, requirementsFileName, type DurableBackendValues } from "../constants";
 import { ext } from "../extensionVariables";
-import { type IHostJsonV2, type INetheriteTaskJson, type ISqlTaskJson, type IStorageTaskJson } from "../funcConfig/host";
+import { type IDTSTaskJson, type IHostJsonV2, type INetheriteTaskJson, type ISqlTaskJson, type IStorageTaskJson } from "../funcConfig/host";
 import { localize } from "../localize";
 import { cpUtils } from "./cpUtils";
 import { dotnetUtils } from "./dotnetUtils";
@@ -24,6 +24,8 @@ export namespace durableUtils {
     export const dotnetIsolatedDfSqlPackage: string = 'Microsoft.Azure.Functions.Worker.Extensions.DurableTask.SqlServer';
     export const dotnetInProcDfNetheritePackage: string = 'Microsoft.Azure.DurableTask.Netherite.AzureFunctions';
     export const dotnetIsolatedDfNetheritePackage: string = 'Microsoft.Azure.Functions.Worker.Extensions.DurableTask.Netherite';
+    export const dotnetInProcDTSPackage: string = 'Microsoft.Azure.WebJobs.Extensions.DurableTask.AzureManaged';
+    export const dotnetIsolatedDTSPackage: string = 'Microsoft.Azure.Functions.Worker.Extensions.DurableTask.AzureManaged';
     export const dotnetInProcDfBasePackage: string = 'Microsoft.Azure.WebJobs.Extensions.DurableTask';
     export const nodeDfPackage: string = 'durable-functions';
     export const pythonDfPackage: string = 'azure-functions-durable';
@@ -62,6 +64,8 @@ export namespace durableUtils {
         switch (hostStorageType) {
             case DurableBackend.Netherite:
                 return DurableBackend.Netherite;
+            case DurableBackend.DTS:
+                return DurableBackend.DTS;
             case DurableBackend.SQL:
                 return DurableBackend.SQL;
             case DurableBackend.Storage:
@@ -150,39 +154,46 @@ export namespace durableUtils {
     }
 
     async function installDotnetDependencies(context: IFunctionWizardContext): Promise<void> {
-        const packageNames: string[] = [];
+        const packages: { name: string; prerelease?: boolean }[] = [];
         const isDotnetIsolated: boolean = /Isolated/i.test(context.functionTemplate?.id ?? '');
 
         switch (context.newDurableStorageType) {
             case DurableBackend.Netherite:
                 isDotnetIsolated ?
-                    packageNames.push(dotnetIsolatedDfNetheritePackage) :
-                    packageNames.push(dotnetInProcDfNetheritePackage);
+                    packages.push({ name: dotnetIsolatedDfNetheritePackage }) :
+                    packages.push({ name: dotnetInProcDfNetheritePackage });
+                break;
+            case DurableBackend.DTS:
+                // Todo: Remove prerelease flag once this functionality is out of preview
+                isDotnetIsolated ?
+                    packages.push({ name: dotnetIsolatedDTSPackage, prerelease: true }) :
+                    packages.push({ name: dotnetInProcDTSPackage, prerelease: true });
                 break;
             case DurableBackend.SQL:
                 isDotnetIsolated ?
-                    packageNames.push(dotnetIsolatedDfSqlPackage) :
-                    packageNames.push(dotnetInProcDfSqlPackage);
+                    packages.push({ name: dotnetIsolatedDfSqlPackage }) :
+                    packages.push({ name: dotnetInProcDfSqlPackage });
                 break;
             case DurableBackend.Storage:
             default:
         }
 
-        /*
-         * https://github.com/microsoft/vscode-azurefunctions/issues/3599
-         * Seems that the package arrives out-dated and needs to be updated to at least 2.9.1;
-         * otherwise, error appears when running with sql backend
-         */
+        // Although the templates should incorporate this package already, it is often included with an out-dated version
+        // which can lead to errors on first run.  To improve this experience for our users, ensure that the latest version is used.
         if (!isDotnetIsolated) {
-            packageNames.push(dotnetInProcDfBasePackage);
+            packages.push({ name: dotnetInProcDfBasePackage });
         }
 
         const failedPackages: string[] = [];
-        for (const packageName of packageNames) {
+        for (const p of packages) {
             try {
-                await cpUtils.executeCommand(ext.outputChannel, context.projectPath, 'dotnet', 'add', 'package', packageName);
+                const packageArgs: string[] = [p.name];
+                if (p.prerelease) {
+                    packageArgs.push('--prerelease');
+                }
+                await cpUtils.executeCommand(ext.outputChannel, context.projectPath, 'dotnet', 'add', 'package', ...packageArgs);
             } catch {
-                failedPackages.push(packageName);
+                failedPackages.push(p.name);
             }
         }
 
@@ -215,9 +226,9 @@ export namespace durableUtils {
         };
     }
 
-    export function getDefaultNetheriteTaskConfig(hubName?: string): INetheriteTaskJson {
+    export function getDefaultNetheriteTaskConfig(hubName: string = ''): INetheriteTaskJson {
         return {
-            hubName: hubName || '',
+            hubName,
             useGracefulShutdown: true,
             storageProvider: {
                 type: DurableBackend.Netherite,
@@ -228,6 +239,16 @@ export namespace durableUtils {
         };
     }
 
+    export function getDefaultDTSTaskConfig(): IDTSTaskJson {
+        return {
+            hubName: '%TASKHUB_NAME%',
+            storageProvider: {
+                type: DurableBackend.DTS,
+                connectionStringName: ConnectionKey.DTS,
+            }
+        };
+    }
+
     export function getDefaultSqlTaskConfig(): ISqlTaskJson {
         return {
             storageProvider: {