Prepare for Fabric native (#2050)

* Implement fabric native path

* Fix default values to work with current fabric clients

* Fix Fabric native mode

* Fix unit test

* export Fabric context

* Dynamically close Home tab for Mirrored databases in Fabric rather than conditional init (which doesn't work for Native)

* For Fabric native, don't show "Delete Database" in context menu and reading databases should return the database from the context.

* Update to V3 messaging

* For data plane operations, skip ARM for Fabric native. Refine the tests for fabric to make the distinction between mirrored key, mirrored AAD and native. Fix FabricUtil to strict compile.

* Add support for refreshing access tokens

* Buf fix: don't wait for refresh is async

* Fix format

* Fix strict compile issue

---------

Co-authored-by: Laurent Nguyen <languye@microsoft.com>

src/Common/CosmosClient.ts

@@ -1,13 +1,14 @@
 import * as Cosmos from "@azure/cosmos";
 import { getAuthorizationTokenUsingResourceTokens } from "Common/getAuthorizationTokenUsingResourceTokens";
+import { CosmosDbArtifactType } from "Contracts/FabricMessagesContract";
 import { AuthorizationToken } from "Contracts/FabricMessageTypes";
-import { checkDatabaseResourceTokensValidity } from "Platform/Fabric/FabricUtil";
+import { checkDatabaseResourceTokensValidity, isFabricMirroredKey } from "Platform/Fabric/FabricUtil";
 import { LocalStorageUtility, StorageKey } from "Shared/StorageUtility";
 import { AuthType } from "../AuthType";
 import { PriorityLevel } from "../Common/Constants";
 import * as Logger from "../Common/Logger";
 import { Platform, configContext } from "../ConfigContext";
-import { updateUserContext, userContext } from "../UserContext";
+import { FabricArtifactInfo, updateUserContext, userContext } from "../UserContext";
 import { isDataplaneRbacSupported } from "../Utils/APITypeUtils";
 import { logConsoleError } from "../Utils/NotificationConsoleUtils";
 import * as PriorityBasedExecutionUtils from "../Utils/PriorityBasedExecutionUtils";
@@ -42,7 +43,7 @@ export const tokenProvider = async (requestInfo: Cosmos.RequestInfo) => {
     return decodeURIComponent(headers.authorization);
   }
 
-  if (configContext.platform === Platform.Fabric) {
+  if (isFabricMirroredKey()) {
     switch (requestInfo.resourceType) {
       case Cosmos.ResourceType.conflicts:
       case Cosmos.ResourceType.container:
@@ -54,8 +55,13 @@ export const tokenProvider = async (requestInfo: Cosmos.RequestInfo) => {
         // User resource tokens
         // TODO userContext.fabricContext.databaseConnectionInfo can be undefined
         headers[HttpHeaders.msDate] = new Date().toUTCString();
-        const resourceTokens = userContext.fabricContext.databaseConnectionInfo.resourceTokens;
+        const resourceTokens = (
-        checkDatabaseResourceTokensValidity(userContext.fabricContext.databaseConnectionInfo.resourceTokensTimestamp);
+          userContext.fabricContext.artifactInfo as FabricArtifactInfo[CosmosDbArtifactType.MIRRORED_KEY]
+        ).resourceTokenInfo.resourceTokens;
+        checkDatabaseResourceTokensValidity(
+          (userContext.fabricContext.artifactInfo as FabricArtifactInfo[CosmosDbArtifactType.MIRRORED_KEY])
+            .resourceTokenInfo.resourceTokensTimestamp,
+        );
         return getAuthorizationTokenUsingResourceTokens(resourceTokens, requestInfo.path, requestInfo.resourceId);
 
       case Cosmos.ResourceType.none:
@@ -66,7 +72,9 @@ export const tokenProvider = async (requestInfo: Cosmos.RequestInfo) => {
         // For now, these operations aren't used, so fetching the authorization token is commented out.
         // This provider must return a real token to pass validation by the client, so we return the cached resource token
         // (which is a valid token, but won't work for these operations).
-        const resourceTokens2 = userContext.fabricContext.databaseConnectionInfo.resourceTokens;
+        const resourceTokens2 = (
+          userContext.fabricContext.artifactInfo as FabricArtifactInfo[CosmosDbArtifactType.MIRRORED_KEY]
+        ).resourceTokenInfo.resourceTokens;
         return getAuthorizationTokenUsingResourceTokens(resourceTokens2, requestInfo.path, requestInfo.resourceId);
 
       /* ************** TODO: Uncomment this code if we need to support these operations **************

src/Common/StyleConstants.ts

@@ -1,10 +1,10 @@
-import { Platform, configContext } from "../ConfigContext";
+import { isFabric } from "Platform/Fabric/FabricUtil";
 
 // eslint-disable-next-line @typescript-eslint/no-var-requires
 export const StyleConstants = require("less-vars-loader!../../less/Common/Constants.less");
 
 export function updateStyles(): void {
-  if (configContext.platform === Platform.Fabric) {
+  if (isFabric()) {
     StyleConstants.AccentMediumHigh = StyleConstants.FabricAccentMediumHigh;
     StyleConstants.AccentMedium = StyleConstants.FabricAccentMedium;
     StyleConstants.AccentLight = StyleConstants.FabricAccentLight;

src/Common/dataAccess/readCollections.ts

@@ -1,9 +1,10 @@
 import { ContainerResponse } from "@azure/cosmos";
 import { Queries } from "Common/Constants";
-import { Platform, configContext } from "ConfigContext";
+import { CosmosDbArtifactType } from "Contracts/FabricMessagesContract";
+import { isFabric, isFabricMirroredKey } from "Platform/Fabric/FabricUtil";
 import { AuthType } from "../../AuthType";
 import * as DataModels from "../../Contracts/DataModels";
-import { userContext } from "../../UserContext";
+import { FabricArtifactInfo, userContext } from "../../UserContext";
 import { logConsoleProgress } from "../../Utils/NotificationConsoleUtils";
 import { listCassandraTables } from "../../Utils/arm/generatedClients/cosmos/cassandraResources";
 import { listGremlinGraphs } from "../../Utils/arm/generatedClients/cosmos/gremlinResources";
@@ -16,15 +17,13 @@ import { handleError } from "../ErrorHandlingUtils";
 export async function readCollections(databaseId: string): Promise<DataModels.Collection[]> {
   const clearMessage = logConsoleProgress(`Querying containers for database ${databaseId}`);
 
-  if (
+  if (isFabricMirroredKey() && userContext.fabricContext?.databaseName === databaseId) {
-    configContext.platform === Platform.Fabric &&
-    userContext.fabricContext &&
-    userContext.fabricContext.databaseConnectionInfo.databaseId === databaseId
-  ) {
     const collections: DataModels.Collection[] = [];
     const promises: Promise<ContainerResponse>[] = [];
 
-    for (const collectionResourceId in userContext.fabricContext.databaseConnectionInfo.resourceTokens) {
+    for (const collectionResourceId in (
+      userContext.fabricContext.artifactInfo as FabricArtifactInfo[CosmosDbArtifactType.MIRRORED_KEY]
+    ).resourceTokenInfo.resourceTokens) {
       // Dictionary key looks like this: dbs/SampleDB/colls/Container
       const resourceIdObj = collectionResourceId.split("/");
       const tokenDatabaseId = resourceIdObj[1];
@@ -56,7 +55,8 @@ export async function readCollections(databaseId: string): Promise<DataModels.Co
     if (
       userContext.authType === AuthType.AAD &&
       !userContext.features.enableSDKoperations &&
-      userContext.apiType !== "Tables"
+      userContext.apiType !== "Tables" &&
+      !isFabric()
     ) {
       return await readCollectionsWithARM(databaseId);
     }

src/Common/dataAccess/readDatabaseOffer.ts

@@ -1,4 +1,4 @@
-import { Platform, configContext } from "ConfigContext";
+import { isFabric, isFabricMirroredKey } from "Platform/Fabric/FabricUtil";
 import { AuthType } from "../../AuthType";
 import { Offer, ReadDatabaseOfferParams } from "../../Contracts/DataModels";
 import { userContext } from "../../UserContext";
@@ -11,7 +11,7 @@ import { handleError } from "../ErrorHandlingUtils";
 import { readOfferWithSDK } from "./readOfferWithSDK";
 
 export const readDatabaseOffer = async (params: ReadDatabaseOfferParams): Promise<Offer> => {
-  if (configContext.platform === Platform.Fabric) {
+  if (isFabricMirroredKey()) {
     // TODO This works, but is very slow, because it requests the token, so we skip for now
     console.error("Skiping readDatabaseOffer for Fabric");
     return undefined;
@@ -23,7 +23,8 @@ export const readDatabaseOffer = async (params: ReadDatabaseOfferParams): Promis
     if (
       userContext.authType === AuthType.AAD &&
       !userContext.features.enableSDKoperations &&
-      userContext.apiType !== "Tables"
+      userContext.apiType !== "Tables" &&
+      !isFabric()
     ) {
       return await readDatabaseOfferWithARM(params.databaseId);
     }

src/Common/dataAccess/readDatabases.ts

@@ -1,7 +1,8 @@
-import { Platform, configContext } from "ConfigContext";
+import { CosmosDbArtifactType } from "Contracts/FabricMessagesContract";
+import { isFabric, isFabricMirroredKey, isFabricNative } from "Platform/Fabric/FabricUtil";
 import { AuthType } from "../../AuthType";
 import * as DataModels from "../../Contracts/DataModels";
-import { userContext } from "../../UserContext";
+import { FabricArtifactInfo, userContext } from "../../UserContext";
 import { logConsoleProgress } from "../../Utils/NotificationConsoleUtils";
 import { listCassandraKeyspaces } from "../../Utils/arm/generatedClients/cosmos/cassandraResources";
 import { listGremlinDatabases } from "../../Utils/arm/generatedClients/cosmos/gremlinResources";
@@ -14,8 +15,13 @@ export async function readDatabases(): Promise<DataModels.Database[]> {
   let databases: DataModels.Database[];
   const clearMessage = logConsoleProgress(`Querying databases`);
 
-  if (configContext.platform === Platform.Fabric && userContext.fabricContext?.databaseConnectionInfo.resourceTokens) {
+  if (
-    const tokensData = userContext.fabricContext.databaseConnectionInfo;
+    isFabricMirroredKey() &&
+    (userContext.fabricContext?.artifactInfo as FabricArtifactInfo[CosmosDbArtifactType.MIRRORED_KEY]).resourceTokenInfo
+      .resourceTokens
+  ) {
+    const tokensData = (userContext.fabricContext.artifactInfo as FabricArtifactInfo[CosmosDbArtifactType.MIRRORED_KEY])
+      .resourceTokenInfo;
 
     const databaseIdsSet = new Set<string>(); // databaseId
 
@@ -46,13 +52,28 @@ export async function readDatabases(): Promise<DataModels.Database[]> {
       }));
     clearMessage();
     return databases;
+  } else if (isFabricNative() && userContext.fabricContext?.databaseName) {
+    const databaseId = userContext.fabricContext.databaseName;
+    databases = [
+      {
+        _rid: "",
+        _self: "",
+        _etag: "",
+        _ts: 0,
+        id: databaseId,
+        collections: [],
+      },
+    ];
+    clearMessage();
+    return databases;
   }
 
   try {
     if (
       userContext.authType === AuthType.AAD &&
       !userContext.features.enableSDKoperations &&
-      userContext.apiType !== "Tables"
+      userContext.apiType !== "Tables" &&
+      !isFabric()
     ) {
       databases = await readDatabasesWithARM();
     } else {

src/Contracts/FabricMessageTypes.ts

@@ -4,6 +4,7 @@
 export enum FabricMessageTypes {
   GetAuthorizationToken = "GetAuthorizationToken",
   GetAllResourceTokens = "GetAllResourceTokens",
+  GetAccessToken = "GetAccessToken",
   Ready = "Ready",
 }
 

src/Contracts/FabricMessagesContract.ts

@@ -1,47 +1,9 @@
-import { AuthorizationToken } from "Contracts/FabricMessageTypes";
+import { AuthorizationToken } from "./FabricMessageTypes";
 
 // This is the version of these messages
-export const FABRIC_RPC_VERSION = "2";
+export const FABRIC_RPC_VERSION = "FabricMessageV3";
 
 // Fabric to Data Explorer
-
-// TODO Deprecated. Remove this section once DE is updated
-export type FabricMessageV1 =
-  | {
-      type: "newContainer";
-      databaseName: string;
-    }
-  | {
-      type: "initialize";
-      message: {
-        endpoint: string | undefined;
-        databaseId: string | undefined;
-        resourceTokens: unknown | undefined;
-        resourceTokensTimestamp: number | undefined;
-        error: string | undefined;
-      };
-    }
-  | {
-      type: "authorizationToken";
-      message: {
-        id: string;
-        error: string | undefined;
-        data: AuthorizationToken | undefined;
-      };
-    }
-  | {
-      type: "allResourceTokens";
-      message: {
-        id: string;
-        error: string | undefined;
-        endpoint: string | undefined;
-        databaseId: string | undefined;
-        resourceTokens: unknown | undefined;
-        resourceTokensTimestamp: number | undefined;
-      };
-    };
-// -----------------------------
-
 export type FabricMessageV2 =
   | {
       type: "newContainer";
@@ -69,7 +31,7 @@ export type FabricMessageV2 =
       message: {
         id: string;
         error: string | undefined;
-        data: FabricDatabaseConnectionInfo | undefined;
+        data: ResourceTokenInfo | undefined;
       };
     }
   | {
@@ -79,17 +41,81 @@ export type FabricMessageV2 =
       };
     };
 
-export type CosmosDBTokenResponse = {
+export type FabricMessageV3 =
-  token: string;
+  | {
-  date: string;
+      type: "newContainer";
-};
+      databaseName: string;
+    }
+  | {
+      type: "initialize";
+      version: string;
+      id: string;
+      message: InitializeMessageV3<CosmosDbArtifactType>;
+    }
+  | {
+      type: "authorizationToken";
+      message: {
+        id: string;
+        error: string | undefined;
+        data: AuthorizationToken | undefined;
+      };
+    }
+  | {
+      type: "allResourceTokens_v2";
+      message: {
+        id: string;
+        error: string | undefined;
+        data: ResourceTokenInfo | undefined;
+      };
+    }
+  | {
+      type: "explorerVisible";
+      message: {
+        visible: boolean;
+      };
+    }
+  | {
+      type: "accessToken";
+      message: {
+        id: string;
+        error: string | undefined;
+        data: { accessToken: string };
+      };
+    };
 
-export type CosmosDBConnectionInfoResponse = {
+export enum CosmosDbArtifactType {
+  MIRRORED_KEY = "MIRRORED_KEY",
+  MIRRORED_AAD = "MIRRORED_AAD",
+  NATIVE = "NATIVE",
+}
+export interface ArtifactConnectionInfo {
+  [CosmosDbArtifactType.MIRRORED_KEY]: { connectionId: string };
+  [CosmosDbArtifactType.MIRRORED_AAD]: AccessTokenConnectionInfo;
+  [CosmosDbArtifactType.NATIVE]: AccessTokenConnectionInfo;
+}
+
+export interface AccessTokenConnectionInfo {
+  accessToken: string;
+  databaseName: string;
+  accountEndpoint: string;
+}
+
+export interface InitializeMessageV3<T extends CosmosDbArtifactType> {
+  connectionId: string;
+  isVisible: boolean;
+  isReadOnly: boolean;
+  artifactType: T;
+  artifactConnectionInfo: ArtifactConnectionInfo[T];
+}
+export interface CosmosDBConnectionInfoResponse {
   endpoint: string;
   databaseId: string;
-  resourceTokens: { [resourceId: string]: string };
+  resourceTokens: Record<string, string> | undefined;
-};
+  accessToken: string | undefined;
+  isReadOnly: boolean;
+  credentialType: "Key" | "OAuth2" | undefined;
+}
 
-export interface FabricDatabaseConnectionInfo extends CosmosDBConnectionInfoResponse {
+export interface ResourceTokenInfo extends CosmosDBConnectionInfoResponse {
   resourceTokensTimestamp: number;
 }

src/Explorer/ContextMenuButtonFactory.tsx

@@ -1,5 +1,7 @@
+import { configContext, Platform } from "ConfigContext";
 import { TreeNodeMenuItem } from "Explorer/Controls/TreeComponent/TreeNodeComponent";
 import { useDatabases } from "Explorer/useDatabases";
+import { isFabric, isFabricNative } from "Platform/Fabric/FabricUtil";
 import { Action } from "Shared/Telemetry/TelemetryConstants";
 import { traceOpen } from "Shared/Telemetry/TelemetryProcessor";
 import { ReactTabKind, useTabs } from "hooks/useTabs";
@@ -19,7 +21,6 @@ import * as ViewModels from "../Contracts/ViewModels";
 import { userContext } from "../UserContext";
 import { getCollectionName, getDatabaseName } from "../Utils/APITypeUtils";
 import { useSidePanel } from "../hooks/useSidePanel";
-import { Platform, configContext } from "./../ConfigContext";
 import Explorer from "./Explorer";
 import { useNotebook } from "./Notebook/useNotebook";
 import { DeleteCollectionConfirmationPane } from "./Panes/DeleteCollectionConfirmationPane/DeleteCollectionConfirmationPane";
@@ -41,7 +42,7 @@ export interface DatabaseContextMenuButtonParams {
  * New resource tree (in ReactJS)
  */
 export const createDatabaseContextMenu = (container: Explorer, databaseId: string): TreeNodeMenuItem[] => {
-  if (configContext.platform === Platform.Fabric && userContext.fabricContext?.isReadOnly) {
+  if (isFabric() && userContext.fabricContext?.isReadOnly) {
     return undefined;
   }
 
@@ -53,7 +54,7 @@ export const createDatabaseContextMenu = (container: Explorer, databaseId: strin
     },
   ];
 
-  if (userContext.apiType !== "Tables" || userContext.features.enableSDKoperations) {
+  if (!isFabricNative() && (userContext.apiType !== "Tables" || userContext.features.enableSDKoperations)) {
     items.push({
       iconSrc: DeleteDatabaseIcon,
       onClick: (lastFocusedElement?: React.RefObject<HTMLElement>) => {

src/Explorer/Explorer.tsx

@@ -8,7 +8,7 @@ import { MessageTypes } from "Contracts/ExplorerContracts";
 import { useDataPlaneRbac } from "Explorer/Panes/SettingsPane/SettingsPane";
 import { getCopilotEnabled, isCopilotFeatureRegistered } from "Explorer/QueryCopilot/Shared/QueryCopilotClient";
 import { IGalleryItem } from "Juno/JunoClient";
-import { scheduleRefreshDatabaseResourceToken } from "Platform/Fabric/FabricUtil";
+import { isFabricMirrored, isFabricMirroredKey, scheduleRefreshFabricToken } from "Platform/Fabric/FabricUtil";
 import { LocalStorageUtility, StorageKey } from "Shared/StorageUtility";
 import { acquireMsalTokenForAccount } from "Utils/AuthorizationUtils";
 import { allowedNotebookServerUrls, validateEndpoint } from "Utils/EndpointUtils";
@@ -43,7 +43,7 @@ import { fromContentUri, toRawContentUri } from "../Utils/GitHubUtils";
 import * as NotificationConsoleUtils from "../Utils/NotificationConsoleUtils";
 import { logConsoleError, logConsoleInfo, logConsoleProgress } from "../Utils/NotificationConsoleUtils";
 import { useSidePanel } from "../hooks/useSidePanel";
-import { useTabs } from "../hooks/useTabs";
+import { ReactTabKind, useTabs } from "../hooks/useTabs";
 import "./ComponentRegisterer";
 import { DialogProps, useDialog } from "./Controls/Dialog";
 import { GalleryTab as GalleryTabKind } from "./Controls/NotebookGallery/GalleryViewerComponent";
@@ -187,6 +187,10 @@ export default class Explorer {
       useNotebook.getState().setNotebookBasePath(userContext.features.notebookBasePath);
     }
 
+    if (isFabricMirrored()) {
+      useTabs.getState().closeReactTab(ReactTabKind.Home);
+    }
+
     this.refreshExplorer();
   }
 
@@ -347,8 +351,8 @@ export default class Explorer {
   };
 
   public onRefreshResourcesClick = async (): Promise<void> => {
-    if (configContext.platform === Platform.Fabric) {
+    if (isFabricMirroredKey()) {
-      scheduleRefreshDatabaseResourceToken(true).then(() => this.refreshAllDatabases());
+      scheduleRefreshFabricToken(true).then(() => this.refreshAllDatabases());
       return;
     }
 

src/Explorer/Menus/CommandBar/CommandBarComponentAdapter.tsx

@@ -6,12 +6,12 @@
 import { CommandBar as FluentCommandBar, ICommandBarItemProps } from "@fluentui/react";
 import { useNotebook } from "Explorer/Notebook/useNotebook";
 import { KeyboardActionGroup, useKeyboardActionGroup } from "KeyboardShortcuts";
+import { isFabric } from "Platform/Fabric/FabricUtil";
 import { userContext } from "UserContext";
 import * as React from "react";
 import create, { UseStore } from "zustand";
 import { ConnectionStatusType, PoolIdType } from "../../../Common/Constants";
 import { StyleConstants } from "../../../Common/StyleConstants";
-import { Platform, configContext } from "../../../ConfigContext";
 import { CommandButtonComponentProps } from "../../Controls/CommandButton/CommandButtonComponent";
 import Explorer from "../../Explorer";
 import { useSelectedNode } from "../../useSelectedNode";
@@ -93,19 +93,18 @@ export const CommandBar: React.FC<Props> = ({ container }: Props) => {
     );
   }
 
-  const rootStyle =
+  const rootStyle = isFabric()
-    configContext.platform === Platform.Fabric
+    ? {
-      ? {
+        root: {
-          root: {
+          backgroundColor: "transparent",
-            backgroundColor: "transparent",
+          padding: "2px 8px 0px 8px",
-            padding: "2px 8px 0px 8px",
+        },
-          },
+      }
-        }
+    : {
-      : {
+        root: {
-          root: {
+          backgroundColor: backgroundColor,
-            backgroundColor: backgroundColor,
+        },
-          },
+      };
-        };
 
   const allButtons = staticButtons.concat(contextButtons).concat(controlButtons);
   const keyboardHandlers = CommandBarUtil.createKeyboardHandlers(allButtons);

src/Explorer/OpenActions/OpenActions.tsx

@@ -1,6 +1,6 @@
 // TODO convert this file to an action registry in order to have actions and their handlers be more tightly coupled.
-import { configContext, Platform } from "ConfigContext";
 import { useDatabases } from "Explorer/useDatabases";
+import { isFabricMirrored } from "Platform/Fabric/FabricUtil";
 import React from "react";
 import { ActionContracts } from "../../Contracts/ExplorerContracts";
 import * as ViewModels from "../../Contracts/ViewModels";
@@ -58,9 +58,9 @@ function openCollectionTab(
       }
 
       if (
-        configContext.platform === Platform.Fabric &&
+        isFabricMirrored() &&
         !(
-          // whitelist the tab kinds that are allowed to be opened in Fabric
+          // whitelist the tab kinds that are allowed to be opened in Fabric mirrored
           (
             action.tabKind === ActionContracts.TabKind.SQLDocuments ||
             action.tabKind === ActionContracts.TabKind.SQLQuery

src/Explorer/Panes/AddCollectionPanel.tsx

@@ -28,6 +28,7 @@ import {
 import { VectorEmbeddingPoliciesComponent } from "Explorer/Controls/VectorSearch/VectorEmbeddingPoliciesComponent";
 import { useSidePanel } from "hooks/useSidePanel";
 import { useTeachingBubble } from "hooks/useTeachingBubble";
+import { isFabricNative } from "Platform/Fabric/FabricUtil";
 import React from "react";
 import { CollectionCreation } from "Shared/Constants";
 import { Action } from "Shared/Telemetry/TelemetryConstants";
@@ -284,150 +285,152 @@ export class AddCollectionPanel extends React.Component<AddCollectionPanelProps,
         )}
 
         <div className="panelMainContent">
-          <Stack hidden={userContext.apiType === "Tables"}>
+          {!(isFabricNative() && this.props.databaseId !== undefined) && (
-            <Stack horizontal>
+            <Stack hidden={userContext.apiType === "Tables"}>
-              <span className="mandatoryStar">*&nbsp;</span>
+              <Stack horizontal>
-              <Text className="panelTextBold" variant="small">
+                <span className="mandatoryStar">*&nbsp;</span>
-                Database {userContext.apiType === "Mongo" ? "name" : "id"}
+                <Text className="panelTextBold" variant="small">
-              </Text>
+                  Database {userContext.apiType === "Mongo" ? "name" : "id"}
-              <TooltipHost
+                </Text>
-                directionalHint={DirectionalHint.bottomLeftEdge}
+                <TooltipHost
-                content={`A database is analogous to a namespace. It is the unit of management for a set of ${getCollectionName(
+                  directionalHint={DirectionalHint.bottomLeftEdge}
-                  true,
+                  content={`A database is analogous to a namespace. It is the unit of management for a set of ${getCollectionName(
-                ).toLocaleLowerCase()}.`}
-              >
-                <Icon
-                  iconName="Info"
-                  className="panelInfoIcon"
-                  tabIndex={0}
-                  ariaLabel={`A database is analogous to a namespace. It is the unit of management for a set of ${getCollectionName(
                     true,
                   ).toLocaleLowerCase()}.`}
-                />
+                >
-              </TooltipHost>
+                  <Icon
-            </Stack>
+                    iconName="Info"
-
+                    className="panelInfoIcon"
-            {configContext.platform !== Platform.Fabric && (
-              <Stack horizontal verticalAlign="center">
-                <div role="radiogroup">
-                  <input
-                    className="panelRadioBtn"
-                    checked={this.state.createNewDatabase}
-                    aria-label="Create new database"
-                    aria-checked={this.state.createNewDatabase}
-                    name="databaseType"
-                    type="radio"
-                    role="radio"
-                    id="databaseCreateNew"
                     tabIndex={0}
-                    onChange={this.onCreateNewDatabaseRadioBtnChange.bind(this)}
+                    ariaLabel={`A database is analogous to a namespace. It is the unit of management for a set of ${getCollectionName(
+                      true,
+                    ).toLocaleLowerCase()}.`}
                   />
-                  <span className="panelRadioBtnLabel">Create new</span>
+                </TooltipHost>
-
-                  <input
-                    className="panelRadioBtn"
-                    checked={!this.state.createNewDatabase}
-                    aria-label="Use existing database"
-                    aria-checked={!this.state.createNewDatabase}
-                    name="databaseType"
-                    type="radio"
-                    role="radio"
-                    tabIndex={0}
-                    onChange={this.onUseExistingDatabaseRadioBtnChange.bind(this)}
-                  />
-                  <span className="panelRadioBtnLabel">Use existing</span>
-                </div>
               </Stack>
-            )}
 
-            {this.state.createNewDatabase && (
+              {configContext.platform !== Platform.Fabric && (
-              <Stack className="panelGroupSpacing">
+                <Stack horizontal verticalAlign="center">
-                <input
+                  <div role="radiogroup">
-                  name="newDatabaseId"
+                    <input
-                  id="newDatabaseId"
+                      className="panelRadioBtn"
-                  aria-required
+                      checked={this.state.createNewDatabase}
-                  required
+                      aria-label="Create new database"
-                  type="text"
+                      aria-checked={this.state.createNewDatabase}
-                  autoComplete="off"
+                      name="databaseType"
-                  pattern="[^/?#\\]*[^/?# \\]"
+                      type="radio"
-                  title="May not end with space nor contain characters '\' '/' '#' '?'"
+                      role="radio"
-                  placeholder="Type a new database id"
+                      id="databaseCreateNew"
-                  size={40}
+                      tabIndex={0}
-                  className="panelTextField"
+                      onChange={this.onCreateNewDatabaseRadioBtnChange.bind(this)}
-                  aria-label="New database id, Type a new database id"
-                  autoFocus
-                  tabIndex={0}
-                  value={this.state.newDatabaseId}
-                  onChange={(event: React.ChangeEvent<HTMLInputElement>) =>
-                    this.setState({ newDatabaseId: event.target.value })
-                  }
-                />
-
-                {!isServerlessAccount() && (
-                  <Stack horizontal>
-                    <Checkbox
-                      label={`Share throughput across ${getCollectionName(true).toLocaleLowerCase()}`}
-                      checked={this.state.isSharedThroughputChecked}
-                      styles={{
-                        text: { fontSize: 12 },
-                        checkbox: { width: 12, height: 12 },
-                        label: { padding: 0, alignItems: "center" },
-                      }}
-                      onChange={(ev: React.FormEvent<HTMLElement>, isChecked: boolean) =>
-                        this.setState({ isSharedThroughputChecked: isChecked })
-                      }
                     />
-                    <TooltipHost
+                    <span className="panelRadioBtnLabel">Create new</span>
-                      directionalHint={DirectionalHint.bottomLeftEdge}
+
-                      content={`Throughput configured at the database level will be shared across all ${getCollectionName(
+                    <input
-                        true,
+                      className="panelRadioBtn"
-                      ).toLocaleLowerCase()} within the database.`}
+                      checked={!this.state.createNewDatabase}
-                    >
+                      aria-label="Use existing database"
-                      <Icon
+                      aria-checked={!this.state.createNewDatabase}
-                        iconName="Info"
+                      name="databaseType"
-                        className="panelInfoIcon"
+                      type="radio"
-                        tabIndex={0}
+                      role="radio"
-                        ariaLabel={`Throughput configured at the database level will be shared across all ${getCollectionName(
+                      tabIndex={0}
+                      onChange={this.onUseExistingDatabaseRadioBtnChange.bind(this)}
+                    />
+                    <span className="panelRadioBtnLabel">Use existing</span>
+                  </div>
+                </Stack>
+              )}
+
+              {this.state.createNewDatabase && (
+                <Stack className="panelGroupSpacing">
+                  <input
+                    name="newDatabaseId"
+                    id="newDatabaseId"
+                    aria-required
+                    required
+                    type="text"
+                    autoComplete="off"
+                    pattern="[^/?#\\]*[^/?# \\]"
+                    title="May not end with space nor contain characters '\' '/' '#' '?'"
+                    placeholder="Type a new database id"
+                    size={40}
+                    className="panelTextField"
+                    aria-label="New database id, Type a new database id"
+                    autoFocus
+                    tabIndex={0}
+                    value={this.state.newDatabaseId}
+                    onChange={(event: React.ChangeEvent<HTMLInputElement>) =>
+                      this.setState({ newDatabaseId: event.target.value })
+                    }
+                  />
+
+                  {!isServerlessAccount() && (
+                    <Stack horizontal>
+                      <Checkbox
+                        label={`Share throughput across ${getCollectionName(true).toLocaleLowerCase()}`}
+                        checked={this.state.isSharedThroughputChecked}
+                        styles={{
+                          text: { fontSize: 12 },
+                          checkbox: { width: 12, height: 12 },
+                          label: { padding: 0, alignItems: "center" },
+                        }}
+                        onChange={(ev: React.FormEvent<HTMLElement>, isChecked: boolean) =>
+                          this.setState({ isSharedThroughputChecked: isChecked })
+                        }
+                      />
+                      <TooltipHost
+                        directionalHint={DirectionalHint.bottomLeftEdge}
+                        content={`Throughput configured at the database level will be shared across all ${getCollectionName(
                           true,
                         ).toLocaleLowerCase()} within the database.`}
-                      />
+                      >
-                    </TooltipHost>
+                        <Icon
-                  </Stack>
+                          iconName="Info"
-                )}
+                          className="panelInfoIcon"
+                          tabIndex={0}
+                          ariaLabel={`Throughput configured at the database level will be shared across all ${getCollectionName(
+                            true,
+                          ).toLocaleLowerCase()} within the database.`}
+                        />
+                      </TooltipHost>
+                    </Stack>
+                  )}
 
-                {!isServerlessAccount() && this.state.isSharedThroughputChecked && (
+                  {!isServerlessAccount() && this.state.isSharedThroughputChecked && (
-                  <ThroughputInput
+                    <ThroughputInput
-                    showFreeTierExceedThroughputTooltip={this.isFreeTierAccount() && !isFirstResourceCreated}
+                      showFreeTierExceedThroughputTooltip={this.isFreeTierAccount() && !isFirstResourceCreated}
-                    isDatabase={true}
+                      isDatabase={true}
-                    isSharded={this.state.isSharded}
+                      isSharded={this.state.isSharded}
-                    isFreeTier={this.isFreeTierAccount()}
+                      isFreeTier={this.isFreeTierAccount()}
-                    isQuickstart={this.props.isQuickstart}
+                      isQuickstart={this.props.isQuickstart}
-                    setThroughputValue={(throughput: number) => (this.newDatabaseThroughput = throughput)}
+                      setThroughputValue={(throughput: number) => (this.newDatabaseThroughput = throughput)}
-                    setIsAutoscale={(isAutoscale: boolean) => (this.isNewDatabaseAutoscale = isAutoscale)}
+                      setIsAutoscale={(isAutoscale: boolean) => (this.isNewDatabaseAutoscale = isAutoscale)}
-                    setIsThroughputCapExceeded={(isThroughputCapExceeded: boolean) =>
+                      setIsThroughputCapExceeded={(isThroughputCapExceeded: boolean) =>
-                      this.setState({ isThroughputCapExceeded })
+                        this.setState({ isThroughputCapExceeded })
-                    }
+                      }
-                    onCostAcknowledgeChange={(isAcknowledge: boolean) => (this.isCostAcknowledged = isAcknowledge)}
+                      onCostAcknowledgeChange={(isAcknowledge: boolean) => (this.isCostAcknowledged = isAcknowledge)}
-                  />
+                    />
-                )}
+                  )}
-              </Stack>
+                </Stack>
-            )}
+              )}
-            {!this.state.createNewDatabase && (
+              {!this.state.createNewDatabase && (
-              <Dropdown
+                <Dropdown
-                ariaLabel="Choose an existing database"
+                  ariaLabel="Choose an existing database"
-                styles={{ title: { height: 27, lineHeight: 27 }, dropdownItem: { fontSize: 12 } }}
+                  styles={{ title: { height: 27, lineHeight: 27 }, dropdownItem: { fontSize: 12 } }}
-                style={{ width: 300, fontSize: 12 }}
+                  style={{ width: 300, fontSize: 12 }}
-                placeholder="Choose an existing database"
+                  placeholder="Choose an existing database"
-                options={this.getDatabaseOptions()}
+                  options={this.getDatabaseOptions()}
-                onChange={(event: React.FormEvent<HTMLDivElement>, database: IDropdownOption) =>
+                  onChange={(event: React.FormEvent<HTMLDivElement>, database: IDropdownOption) =>
-                  this.setState({ selectedDatabaseId: database.key as string })
+                    this.setState({ selectedDatabaseId: database.key as string })
-                }
+                  }
-                defaultSelectedKey={this.props.databaseId}
+                  defaultSelectedKey={this.props.databaseId}
-                responsiveMode={999}
+                  responsiveMode={999}
-              />
+                />
-            )}
+              )}
-            <Separator className="panelSeparator" />
+              <Separator className="panelSeparator" />
-          </Stack>
+            </Stack>
+          )}
 
           <Stack>
             <Stack horizontal>
@@ -666,7 +669,7 @@ export class AddCollectionPanel extends React.Component<AddCollectionPanelProps,
                     </Stack>
                   );
                 })}
-              {userContext.apiType === "SQL" && (
+              {!isFabricNative() && userContext.apiType === "SQL" && (
                 <Stack className="panelGroupSpacing">
                   <DefaultButton
                     styles={{ root: { padding: 0, width: 200, height: 30 }, label: { fontSize: 12 } }}
@@ -747,7 +750,7 @@ export class AddCollectionPanel extends React.Component<AddCollectionPanelProps,
             />
           )}
 
-          {userContext.apiType === "SQL" && (
+          {!isFabricNative() && userContext.apiType === "SQL" && (
             <Stack>
               <Stack horizontal>
                 <Text className="panelTextBold" variant="small">
@@ -937,7 +940,7 @@ export class AddCollectionPanel extends React.Component<AddCollectionPanelProps,
               </CollapsibleSectionComponent>
             </Stack>
           )}
-          {userContext.apiType !== "Tables" && (
+          {!isFabricNative() && userContext.apiType !== "Tables" && (
             <CollapsibleSectionComponent
               title="Advanced"
               isExpandedByDefault={false}
@@ -1260,7 +1263,7 @@ export class AddCollectionPanel extends React.Component<AddCollectionPanelProps,
   // }
 
   private shouldShowCollectionThroughputInput(): boolean {
-    if (isServerlessAccount()) {
+    if (isFabricNative() || isServerlessAccount()) {
       return false;
     }
 
@@ -1286,7 +1289,7 @@ export class AddCollectionPanel extends React.Component<AddCollectionPanelProps,
   }
 
   private shouldShowAnalyticalStoreOptions(): boolean {
-    if (configContext.platform === Platform.Emulator) {
+    if (isFabricNative() || configContext.platform === Platform.Emulator) {
       return false;
     }
 

src/Explorer/Sidebar.tsx

@@ -1,5 +1,6 @@
 import {
   Button,
+  makeStyles,
   Menu,
   MenuButton,
   MenuButtonProps,
@@ -7,13 +8,12 @@ import {
   MenuList,
   MenuPopover,
   MenuTrigger,
-  SplitButton,
-  makeStyles,
   mergeClasses,
   shorthands,
+  SplitButton,
 } from "@fluentui/react-components";
 import { Add16Regular, ArrowSync12Regular, ChevronLeft12Regular, ChevronRight12Regular } from "@fluentui/react-icons";
-import { Platform, configContext } from "ConfigContext";
+import { configContext, Platform } from "ConfigContext";
 import Explorer from "Explorer/Explorer";
 import { AddDatabasePanel } from "Explorer/Panes/AddDatabasePanel/AddDatabasePanel";
 import { Tabs } from "Explorer/Tabs/Tabs";
@@ -21,6 +21,7 @@ import { CosmosFluentProvider, cosmosShorthands, tokens } from "Explorer/Theme/T
 import { ResourceTree } from "Explorer/Tree/ResourceTree";
 import { useDatabases } from "Explorer/useDatabases";
 import { KeyboardAction, KeyboardActionGroup, KeyboardActionHandler, useKeyboardActionGroup } from "KeyboardShortcuts";
+import { isFabric, isFabricMirrored, isFabricNative } from "Platform/Fabric/FabricUtil";
 import { userContext } from "UserContext";
 import { getCollectionName, getDatabaseName } from "Utils/APITypeUtils";
 import { Allotment, AllotmentHandle } from "allotment";
@@ -123,7 +124,7 @@ const GlobalCommands: React.FC<GlobalCommandsProps> = ({ explorer }) => {
 
   const actions = useMemo<GlobalCommand[]>(() => {
     if (
-      configContext.platform === Platform.Fabric ||
+      (isFabric() && userContext.fabricContext?.isReadOnly) ||
       userContext.apiType === "Postgres" ||
       userContext.apiType === "VCoreMongo"
     ) {
@@ -137,12 +138,15 @@ const GlobalCommands: React.FC<GlobalCommandsProps> = ({ explorer }) => {
         id: "new_collection",
         label: `New ${getCollectionName()}`,
         icon: <Add16Regular />,
-        onClick: () => explorer.onNewCollectionClicked(),
+        onClick: () => {
+          const databaseId = isFabricNative() ? userContext.fabricContext?.databaseName : undefined;
+          explorer.onNewCollectionClicked({ databaseId });
+        },
         keyboardAction: KeyboardAction.NEW_COLLECTION,
       },
     ];
 
-    if (userContext.apiType !== "Tables") {
+    if (configContext.platform !== Platform.Fabric && userContext.apiType !== "Tables") {
       actions.push({
         id: "new_database",
         label: `New ${getDatabaseName()}`,
@@ -288,7 +292,7 @@ export const SidebarContainer: React.FC<SidebarProps> = ({ explorer }) => {
   }, [setLoading]);
 
   const hasGlobalCommands = !(
-    configContext.platform === Platform.Fabric ||
+    isFabricMirrored() ||
     userContext.apiType === "Postgres" ||
     userContext.apiType === "VCoreMongo"
   );

src/Explorer/SplashScreen/FabricHome.tsx

@@ -0,0 +1,173 @@
+/**
+ * Accordion top class
+ */
+import { Link, makeStyles, tokens } from "@fluentui/react-components";
+import { DocumentAddRegular, LinkMultipleRegular } from "@fluentui/react-icons";
+import { isFabricNative } from "Platform/Fabric/FabricUtil";
+import * as React from "react";
+import { userContext } from "UserContext";
+import CosmosDbBlackIcon from "../../../images/CosmosDB_black.svg";
+import LinkIcon from "../../../images/Link_blue.svg";
+import Explorer from "../Explorer";
+
+export interface SplashScreenProps {
+  explorer: Explorer;
+}
+
+const useStyles = makeStyles({
+  homeContainer: {
+    width: "100%",
+    alignContent: "center",
+  },
+  title: {
+    textAlign: "center",
+    fontSize: "20px",
+    fontWeight: "bold",
+  },
+  buttonsContainer: {
+    width: "584px",
+    margin: "auto",
+    display: "grid",
+    padding: "16px",
+    gridTemplateColumns: "repeat(3, 1fr)",
+    gap: "10px",
+    gridAutoRows: "minmax(184px, auto)",
+  },
+  one: {
+    gridColumn: "1 / 3",
+    gridRow: "1 / 3",
+    "& svg": {
+      width: "48px",
+      height: "48px",
+      margin: "auto",
+    },
+  },
+  two: {
+    gridColumn: "3",
+    gridRow: "1",
+    "& img": {
+      width: "32px",
+      height: "32px",
+      margin: "auto",
+    },
+  },
+  three: {
+    gridColumn: "3",
+    gridRow: "2",
+    "& svg": {
+      width: "32px",
+      height: "32px",
+      margin: "auto",
+    },
+  },
+  buttonContainer: {
+    height: "100%",
+    display: "flex",
+    flexDirection: "column",
+    border: "1px solid #e0e0e0",
+    cursor: "pointer",
+    "&:hover": {
+      backgroundColor: tokens.colorNeutralBackground1Hover,
+      "border-color": tokens.colorNeutralStroke1Hover,
+    },
+  },
+  buttonUpperPart: {
+    textAlign: "center",
+    flexGrow: 1,
+    display: "flex",
+    backgroundColor: "#e3f7ef",
+  },
+  buttonLowerPart: {
+    borderTop: "1px solid #e0e0e0",
+    height: "76px",
+    padding: "8px",
+    "> div:nth-child(1)": {
+      fontWeight: "bold",
+    },
+    display: "flex",
+    flexDirection: "column",
+    justifyContent: "center",
+  },
+  footer: {
+    textAlign: "center",
+  },
+});
+
+interface FabricHomeScreenButtonProps {
+  title: string;
+  description: string;
+  icon: JSX.Element;
+  onClick?: () => void;
+}
+
+const FabricHomeScreenButton: React.FC<FabricHomeScreenButtonProps & { className: string }> = ({
+  title,
+  description,
+  icon,
+  className,
+  onClick,
+}) => {
+  const styles = useStyles();
+
+  // TODO Make this a11y copmliant: aria-label for icon
+  return (
+    <div role="button" className={`${styles.buttonContainer} ${className}`} onClick={onClick}>
+      <div className={styles.buttonUpperPart}>{icon}</div>
+      <div className={styles.buttonLowerPart}>
+        <div>{title}</div>
+        <div>{description}</div>
+      </div>
+    </div>
+  );
+};
+
+export const FabricHomeScreen: React.FC<SplashScreenProps> = (props: SplashScreenProps) => {
+  const styles = useStyles();
+  const getSplashScreenButtons = (): JSX.Element => {
+    const buttons: FabricHomeScreenButtonProps[] = [
+      {
+        title: "New container",
+        description: "Create a destination container to store your data",
+        icon: <DocumentAddRegular />,
+        onClick: () => {
+          const databaseId = isFabricNative() ? userContext.fabricContext?.databaseName : undefined;
+          props.explorer.onNewCollectionClicked({ databaseId });
+        },
+      },
+      {
+        title: "Sample data",
+        description: "Automatically load sample data in your database",
+        icon: <img src={CosmosDbBlackIcon} />,
+      },
+      {
+        title: "App development",
+        description: "Start here to use an SDK to build your apps",
+        icon: <LinkMultipleRegular />,
+      },
+    ];
+
+    return (
+      <div className={styles.buttonsContainer}>
+        <FabricHomeScreenButton className={styles.one} {...buttons[0]} />
+        <FabricHomeScreenButton className={styles.two} {...buttons[1]} />
+        <FabricHomeScreenButton className={styles.three} {...buttons[2]} />
+      </div>
+    );
+  };
+
+  const title = "Build your database";
+  return (
+    <div className={styles.homeContainer}>
+      <div className={styles.title} role="heading" aria-label={title}>
+        {title}
+      </div>
+      {getSplashScreenButtons()}
+      <div className={styles.footer}>
+        Need help?{" "}
+        <Link href="https://cosmos.azure.com/docs" target="_blank">
+          Learn more <img src={LinkIcon} alt="Learn more" />
+        </Link>
+      </div>
+    </div>
+  );
+};

src/Explorer/Tabs/DocumentsTabV2/DocumentsTabV2.test.tsx

@@ -2,6 +2,7 @@ import { FeedResponse, ItemDefinition, Resource } from "@azure/cosmos";
 import { waitFor } from "@testing-library/react";
 import { deleteDocuments } from "Common/dataAccess/deleteDocument";
 import { Platform, updateConfigContext } from "ConfigContext";
+import { CosmosDbArtifactType } from "Contracts/FabricMessagesContract";
 import { useDialog } from "Explorer/Controls/Dialog";
 import { EditorReactProps } from "Explorer/Controls/Editor/EditorReact";
 import { ProgressModalDialog } from "Explorer/Controls/ProgressModalDialog";
@@ -341,10 +342,15 @@ describe("Documents tab (noSql API)", () => {
     updateConfigContext({ platform: Platform.Fabric });
     updateUserContext({
       fabricContext: {
-        connectionId: "test",
+        databaseName: "database",
-        databaseConnectionInfo: undefined,
+        artifactInfo: {
+          connectionId: "test",
+          resourceTokenInfo: undefined,
+        },
+        artifactType: CosmosDbArtifactType.MIRRORED_KEY,
         isReadOnly: true,
         isVisible: true,
+        fabricClientRpcVersion: "rpcVersion",
       },
     });
 

src/Explorer/Tabs/DocumentsTabV2/DocumentsTabV2.tsx

@@ -20,7 +20,6 @@ import {
 import { queryDocuments } from "Common/dataAccess/queryDocuments";
 import { readDocument } from "Common/dataAccess/readDocument";
 import { updateDocument } from "Common/dataAccess/updateDocument";
-import { Platform, configContext } from "ConfigContext";
 import { ActionType, OpenCollectionTab, TabKind } from "Contracts/ActionContracts";
 import { CommandButtonComponentProps } from "Explorer/Controls/CommandButton/CommandButtonComponent";
 import { useDialog } from "Explorer/Controls/Dialog";
@@ -43,6 +42,7 @@ import { usePrevious } from "Explorer/Tabs/DocumentsTabV2/SelectionHelper";
 import { CosmosFluentProvider, LayoutConstants, cosmosShorthands, tokens } from "Explorer/Theme/ThemeUtil";
 import { useSelectedNode } from "Explorer/useSelectedNode";
 import { KeyboardAction, KeyboardActionGroup, useKeyboardActionGroup } from "KeyboardShortcuts";
+import { isFabric } from "Platform/Fabric/FabricUtil";
 import { QueryConstants } from "Shared/Constants";
 import { LocalStorageUtility, StorageKey } from "Shared/StorageUtility";
 import { Action } from "Shared/Telemetry/TelemetryConstants";
@@ -344,7 +344,7 @@ export const getTabsButtons = ({
   onRevertExistingDocumentClick,
   onDeleteExistingDocumentsClick,
 }: ButtonsDependencies): CommandButtonComponentProps[] => {
-  if (configContext.platform === Platform.Fabric && userContext.fabricContext?.isReadOnly) {
+  if (isFabric() && userContext.fabricContext?.isReadOnly) {
     // All the following buttons require write access
     return [];
   }
@@ -2136,8 +2136,7 @@ export const DocumentsTabComponent: React.FunctionComponent<IDocumentsTabCompone
                     selectedColumnIds={selectedColumnIds}
                     columnDefinitions={columnDefinitions}
                     isRowSelectionDisabled={
-                      isBulkDeleteDisabled ||
+                      isBulkDeleteDisabled || (isFabric() && userContext.fabricContext?.isReadOnly)
-                      (configContext.platform === Platform.Fabric && userContext.fabricContext?.isReadOnly)
                     }
                     onColumnSelectionChange={onColumnSelectionChange}
                     defaultColumnSelection={getInitialColumnSelection()}

src/Explorer/Tabs/Tabs.tsx

@@ -2,6 +2,7 @@ import { CollectionTabKind } from "Contracts/ViewModels";
 import Explorer from "Explorer/Explorer";
 import { useCommandBar } from "Explorer/Menus/CommandBar/CommandBarComponentAdapter";
 import { QueryCopilotTab } from "Explorer/QueryCopilot/QueryCopilotTab";
+import { FabricHomeScreen } from "Explorer/SplashScreen/FabricHome";
 import { SplashScreen } from "Explorer/SplashScreen/SplashScreen";
 import { ConnectTab } from "Explorer/Tabs/ConnectTab";
 import { PostgresConnectTab } from "Explorer/Tabs/PostgresConnectTab";
@@ -9,6 +10,7 @@ import { QuickstartTab } from "Explorer/Tabs/QuickstartTab";
 import { VcoreMongoConnectTab } from "Explorer/Tabs/VCoreMongoConnectTab";
 import { VcoreMongoQuickstartTab } from "Explorer/Tabs/VCoreMongoQuickstartTab";
 import { KeyboardAction, KeyboardActionGroup, useKeyboardActionGroup } from "KeyboardShortcuts";
+import { isFabricNative } from "Platform/Fabric/FabricUtil";
 import { userContext } from "UserContext";
 import { useTeachingBubble } from "hooks/useTeachingBubble";
 import ko from "knockout";
@@ -271,7 +273,11 @@ const getReactTabContent = (activeReactTab: ReactTabKind, explorer: Explorer): J
         <ConnectTab />
       );
     case ReactTabKind.Home:
-      return <SplashScreen explorer={explorer} />;
+      if (isFabricNative()) {
+        return <FabricHomeScreen explorer={explorer} />;
+      } else {
+        return <SplashScreen explorer={explorer} />;
+      }
     case ReactTabKind.Quickstart:
       return userContext.apiType === "VCoreMongo" ? (
         <VcoreMongoQuickstartTab explorer={explorer} />

src/Explorer/Tree/Collection.ts

@@ -1,6 +1,7 @@
 import { Resource, StoredProcedureDefinition, TriggerDefinition, UserDefinedFunctionDefinition } from "@azure/cosmos";
 import { useNotebook } from "Explorer/Notebook/useNotebook";
 import { DocumentsTabV2 } from "Explorer/Tabs/DocumentsTabV2/DocumentsTabV2";
+import { isFabricMirrored } from "Platform/Fabric/FabricUtil";
 import * as ko from "knockout";
 import * as _ from "underscore";
 import * as Constants from "../../Common/Constants";
@@ -34,7 +35,6 @@ import QueryTablesTab from "../Tabs/QueryTablesTab";
 import { CollectionSettingsTabV2 } from "../Tabs/SettingsTabV2";
 import { useDatabases } from "../useDatabases";
 import { useSelectedNode } from "../useSelectedNode";
-import { Platform, configContext } from "./../../ConfigContext";
 import ConflictId from "./ConflictId";
 import DocumentId from "./DocumentId";
 import StoredProcedure from "./StoredProcedure";
@@ -210,7 +210,7 @@ export default class Collection implements ViewModels.Collection {
     });
 
     const showScriptsMenus: boolean =
-      configContext.platform != Platform.Fabric && (userContext.apiType === "SQL" || userContext.apiType === "Gremlin");
+      !isFabricMirrored() && (userContext.apiType === "SQL" || userContext.apiType === "Gremlin");
     this.showStoredProcedures = ko.observable<boolean>(showScriptsMenus);
     this.showTriggers = ko.observable<boolean>(showScriptsMenus);
     this.showUserDefinedFunctions = ko.observable<boolean>(showScriptsMenus);

src/Explorer/Tree/ResourceTree.tsx

@@ -1,7 +1,6 @@
 import { Tree, TreeItemValue, TreeOpenChangeData, TreeOpenChangeEvent } from "@fluentui/react-components";
 import { Home16Regular } from "@fluentui/react-icons";
 import { AuthType } from "AuthType";
-import { Platform, configContext } from "ConfigContext";
 import { useTreeStyles } from "Explorer/Controls/TreeComponent/Styles";
 import { TreeNode, TreeNodeComponent } from "Explorer/Controls/TreeComponent/TreeNodeComponent";
 import {
@@ -11,6 +10,7 @@ import {
 } from "Explorer/Tree/treeNodeUtil";
 import { useDatabases } from "Explorer/useDatabases";
 import { useSelectedNode } from "Explorer/useSelectedNode";
+import { isFabricMirrored } from "Platform/Fabric/FabricUtil";
 import { userContext } from "UserContext";
 import { useQueryCopilot } from "hooks/useQueryCopilot";
 import { ReactTabKind, useTabs } from "hooks/useTabs";
@@ -76,23 +76,22 @@ export const ResourceTree: React.FC<ResourceTreeProps> = ({ explorer }: Resource
       : [];
   }, [isSampleDataEnabled, sampleDataResourceTokenCollection]);
 
-  const headerNodes: TreeNode[] =
+  const headerNodes: TreeNode[] = isFabricMirrored()
-    configContext.platform === Platform.Fabric
+    ? []
-      ? []
+    : [
-      : [
+        {
-          {
+          id: "home",
-            id: "home",
+          iconSrc: <Home16Regular />,
-            iconSrc: <Home16Regular />,
+          label: "Home",
-            label: "Home",
+          isSelected: () =>
-            isSelected: () =>
+            useSelectedNode.getState().selectedNode === undefined &&
-              useSelectedNode.getState().selectedNode === undefined &&
+            useTabs.getState().activeReactTab === ReactTabKind.Home,
-              useTabs.getState().activeReactTab === ReactTabKind.Home,
+          onClick: () => {
-            onClick: () => {
+            useSelectedNode.getState().setSelectedNode(undefined);
-              useSelectedNode.getState().setSelectedNode(undefined);
+            useTabs.getState().openAndActivateReactTab(ReactTabKind.Home);
-              useTabs.getState().openAndActivateReactTab(ReactTabKind.Home);
-            },
           },
-        ];
+        },
+      ];
 
   const rootNodes: TreeNode[] = useMemo(() => {
     if (sampleDataNodes.length > 0) {

src/Explorer/Tree/treeNodeUtil.test.ts

@@ -1,5 +1,6 @@
 import { CapabilityNames } from "Common/Constants";
 import { Platform, updateConfigContext } from "ConfigContext";
+import { CosmosDbArtifactType } from "Contracts/FabricMessagesContract";
 import { TreeNode } from "Explorer/Controls/TreeComponent/TreeNodeComponent";
 import Explorer from "Explorer/Explorer";
 import { useCommandBar } from "Explorer/Menus/CommandBar/CommandBarComponentAdapter";
@@ -16,7 +17,7 @@ import {
 } from "Explorer/Tree/treeNodeUtil";
 import { useDatabases } from "Explorer/useDatabases";
 import { useSelectedNode } from "Explorer/useSelectedNode";
-import { updateUserContext } from "UserContext";
+import { FabricContext, updateUserContext } from "UserContext";
 import PromiseSource from "Utils/PromiseSource";
 import { useSidePanel } from "hooks/useSidePanel";
 import { useTabs } from "hooks/useTabs";
@@ -551,7 +552,17 @@ describe("createDatabaseTreeNodes", () => {
       });
 
       it.each([
-        ["in Fabric", () => updateConfigContext({ platform: Platform.Fabric })],
+        [
+          "in Fabric",
+          () => {
+            updateConfigContext({ platform: Platform.Fabric });
+            updateUserContext({
+              fabricContext: {
+                artifactType: CosmosDbArtifactType.MIRRORED_KEY,
+              } as FabricContext<CosmosDbArtifactType>,
+            });
+          },
+        ],
         [
           "for Cassandra API",
           () =>

src/Explorer/Tree/treeNodeUtil.tsx

@@ -6,6 +6,7 @@ import StoredProcedure from "Explorer/Tree/StoredProcedure";
 import Trigger from "Explorer/Tree/Trigger";
 import UserDefinedFunction from "Explorer/Tree/UserDefinedFunction";
 import { useDatabases } from "Explorer/useDatabases";
+import { isFabricMirrored } from "Platform/Fabric/FabricUtil";
 import { getItemName } from "Utils/APITypeUtils";
 import { isServerlessAccount } from "Utils/CapabilityUtils";
 import { useTabs } from "hooks/useTabs";
@@ -22,9 +23,7 @@ import { useNotebook } from "../Notebook/useNotebook";
 import { useSelectedNode } from "../useSelectedNode";
 
 export const shouldShowScriptNodes = (): boolean => {
-  return (
+  return !isFabricMirrored() && (userContext.apiType === "SQL" || userContext.apiType === "Gremlin");
-    configContext.platform !== Platform.Fabric && (userContext.apiType === "SQL" || userContext.apiType === "Gremlin")
-  );
 };
 
 const TreeDatabaseIcon = <DatabaseRegular fontSize={16} />;

src/Platform/Fabric/FabricUtil.ts

@@ -1,56 +1,112 @@
 import { sendCachedDataMessage } from "Common/MessageHandler";
+import { configContext, Platform } from "ConfigContext";
 import { FabricMessageTypes } from "Contracts/FabricMessageTypes";
-import { FabricDatabaseConnectionInfo } from "Contracts/FabricMessagesContract";
+import { CosmosDbArtifactType, ResourceTokenInfo } from "Contracts/FabricMessagesContract";
-import { updateUserContext, userContext } from "UserContext";
+import { FabricArtifactInfo, updateUserContext, userContext } from "UserContext";
 import { logConsoleError } from "Utils/NotificationConsoleUtils";
 
 const TOKEN_VALIDITY_MS = (3600 - 600) * 1000; // 1 hour minus 10 minutes to be safe
 const DEBOUNCE_DELAY_MS = 1000 * 20; // 20 second
-let timeoutId: NodeJS.Timeout;
+let timeoutId: NodeJS.Timeout | undefined;
 
 // Prevents multiple parallel requests during DEBOUNCE_DELAY_MS
-let lastRequestTimestamp: number = undefined;
+let lastRequestTimestamp: number | undefined = undefined;
 
-const requestDatabaseResourceTokens = async (): Promise<void> => {
+/**
+ * Request fabric token:
+ * - Mirrored key and AAD: Database Resource Tokens
+ * - Native: AAD token
+ * @returns
+ */
+const requestFabricToken = async (): Promise<void> => {
   if (lastRequestTimestamp !== undefined && lastRequestTimestamp + DEBOUNCE_DELAY_MS > Date.now()) {
     return;
   }
 
   lastRequestTimestamp = Date.now();
   try {
-    const fabricDatabaseConnectionInfo = await sendCachedDataMessage<FabricDatabaseConnectionInfo>(
+    if (isFabricMirrored()) {
-      FabricMessageTypes.GetAllResourceTokens,
+      await requestAndStoreDatabaseResourceTokens();
-      [],
+    } else if (isFabricNative()) {
-      userContext.fabricContext.connectionId,
+      await requestAndStoreAccessToken();
-    );
-
-    if (!userContext.databaseAccount.properties.documentEndpoint) {
-      userContext.databaseAccount.properties.documentEndpoint = fabricDatabaseConnectionInfo.endpoint;
     }
 
-    updateUserContext({
+    scheduleRefreshFabricToken();
-      fabricContext: {
-        ...userContext.fabricContext,
-        databaseConnectionInfo: fabricDatabaseConnectionInfo,
-        isReadOnly: true,
-      },
-      databaseAccount: { ...userContext.databaseAccount },
-    });
-    scheduleRefreshDatabaseResourceToken();
   } catch (error) {
-    logConsoleError(error);
+    logConsoleError(error as string);
     throw error;
   } finally {
     lastRequestTimestamp = undefined;
   }
 };
 
+const requestAndStoreDatabaseResourceTokens = async (): Promise<void> => {
+  if (!userContext.fabricContext || !userContext.databaseAccount) {
+    // This should not happen
+    logConsoleError("Fabric context or database account is missing: cannot request tokens");
+    return;
+  }
+
+  const resourceTokenInfo = await sendCachedDataMessage<ResourceTokenInfo>(
+    FabricMessageTypes.GetAllResourceTokens,
+    [],
+    userContext.fabricContext.artifactInfo?.connectionId,
+  );
+
+  if (!userContext.databaseAccount.properties.documentEndpoint) {
+    userContext.databaseAccount.properties.documentEndpoint = resourceTokenInfo.endpoint;
+  }
+
+  if (resourceTokenInfo.credentialType === "OAuth2") {
+    // Mirrored AAD
+    updateUserContext({
+      fabricContext: {
+        ...userContext.fabricContext,
+        databaseName: resourceTokenInfo.databaseId,
+        artifactInfo: undefined,
+        isReadOnly: resourceTokenInfo.isReadOnly ?? userContext.fabricContext.isReadOnly,
+      },
+      databaseAccount: { ...userContext.databaseAccount },
+      aadToken: resourceTokenInfo.accessToken,
+    });
+  } else {
+    // TODO: In Fabric contract V2, credentialType is undefined. For V3, it is "Key". Check for "Key" when V3 is supported for Fabric Mirroring Key
+    // Mirrored key
+    updateUserContext({
+      fabricContext: {
+        ...userContext.fabricContext,
+        databaseName: resourceTokenInfo.databaseId,
+        artifactInfo: {
+          ...(userContext.fabricContext.artifactInfo as FabricArtifactInfo[CosmosDbArtifactType.MIRRORED_KEY]),
+          resourceTokenInfo,
+        },
+        isReadOnly: resourceTokenInfo.isReadOnly ?? userContext.fabricContext.isReadOnly,
+      },
+      databaseAccount: { ...userContext.databaseAccount },
+    });
+  }
+};
+
+const requestAndStoreAccessToken = async (): Promise<void> => {
+  if (!userContext.fabricContext || !userContext.databaseAccount) {
+    // This should not happen
+    logConsoleError("Fabric context or database account is missing: cannot request tokens");
+    return;
+  }
+
+  const accessTokenInfo = await sendCachedDataMessage<{ accessToken: string }>(FabricMessageTypes.GetAccessToken, []);
+
+  updateUserContext({
+    aadToken: accessTokenInfo.accessToken,
+  });
+};
+
 /**
  * Check token validity and schedule a refresh if necessary
  * @param tokenTimestamp
  * @returns
  */
-export const scheduleRefreshDatabaseResourceToken = (refreshNow?: boolean): Promise<void> => {
+export const scheduleRefreshFabricToken = (refreshNow?: boolean): Promise<void> => {
   return new Promise((resolve) => {
     if (timeoutId !== undefined) {
       clearTimeout(timeoutId);
@@ -59,7 +115,7 @@ export const scheduleRefreshDatabaseResourceToken = (refreshNow?: boolean): Prom
 
     timeoutId = setTimeout(
       () => {
-        requestDatabaseResourceTokens().then(resolve);
+        requestFabricToken().then(resolve);
       },
       refreshNow ? 0 : TOKEN_VALIDITY_MS,
     );
@@ -68,6 +124,15 @@ export const scheduleRefreshDatabaseResourceToken = (refreshNow?: boolean): Prom
 
 export const checkDatabaseResourceTokensValidity = (tokenTimestamp: number): void => {
   if (tokenTimestamp + TOKEN_VALIDITY_MS < Date.now()) {
-    scheduleRefreshDatabaseResourceToken(true);
+    scheduleRefreshFabricToken(true);
   }
 };
+
+export const isFabric = (): boolean => configContext.platform === Platform.Fabric;
+export const isFabricMirroredKey = (): boolean =>
+  isFabric() && userContext.fabricContext?.artifactType === CosmosDbArtifactType.MIRRORED_KEY;
+export const isFabricMirroredAAD = (): boolean =>
+  isFabric() && userContext.fabricContext?.artifactType === CosmosDbArtifactType.MIRRORED_AAD;
+export const isFabricMirrored = (): boolean => isFabricMirroredKey() || isFabricMirroredAAD();
+export const isFabricNative = (): boolean =>
+  isFabric() && userContext.fabricContext?.artifactType === CosmosDbArtifactType.NATIVE;

src/UserContext.ts

@@ -1,4 +1,4 @@
-import { FabricDatabaseConnectionInfo } from "Contracts/FabricMessagesContract";
+import { CosmosDbArtifactType, ResourceTokenInfo } from "Contracts/FabricMessagesContract";
 import { ParsedResourceTokenConnectionString } from "Platform/Hosted/Helpers/ResourceTokenUtils";
 import { Action } from "Shared/Telemetry/TelemetryConstants";
 import { traceOpen } from "Shared/Telemetry/TelemetryProcessor";
@@ -47,11 +47,21 @@ export interface VCoreMongoConnectionParams {
   connectionString: string;
 }
 
-interface FabricContext {
+export interface FabricArtifactInfo {
-  connectionId: string;
+  [CosmosDbArtifactType.MIRRORED_KEY]: {
-  databaseConnectionInfo: FabricDatabaseConnectionInfo | undefined;
+    connectionId: string;
+    resourceTokenInfo: ResourceTokenInfo | undefined;
+  };
+  [CosmosDbArtifactType.MIRRORED_AAD]: undefined;
+  [CosmosDbArtifactType.NATIVE]: undefined;
+}
+export interface FabricContext<T extends CosmosDbArtifactType> {
+  fabricClientRpcVersion: string;
   isReadOnly: boolean;
   isVisible: boolean;
+  databaseName: string;
+  artifactType: CosmosDbArtifactType;
+  artifactInfo: FabricArtifactInfo[T];
 }
 
 export type AdminFeedbackControlPolicy =
@@ -70,7 +80,7 @@ export type AdminFeedbackPolicySettings = {
 };
 
 export interface UserContext {
-  readonly fabricContext?: FabricContext;
+  readonly fabricContext?: FabricContext<CosmosDbArtifactType>;
   readonly authType?: AuthType;
   readonly masterKey?: string;
   readonly subscriptionId?: string;

src/Utils/WindowUtils.ts

@@ -1,3 +1,4 @@
+import { isFabric } from "Platform/Fabric/FabricUtil";
 import { Platform, configContext } from "./../ConfigContext";
 
 export const getDataExplorerWindow = (currentWindow: Window): Window | undefined => {
@@ -7,7 +8,7 @@ export const getDataExplorerWindow = (currentWindow: Window): Window | undefined
       if (currentWindow.parent === currentWindow) {
         return undefined;
       }
-      if (configContext.platform === Platform.Fabric && currentWindow.parent.parent === currentWindow.top) {
+      if (isFabric() && currentWindow.parent.parent === currentWindow.top) {
         // in Fabric data explorer is inside an extension iframe, so we have two parent iframes
         return currentWindow;
       }

src/hooks/useKnockoutExplorer.ts

@@ -2,11 +2,19 @@ import * as Constants from "Common/Constants";
 import { createUri } from "Common/UrlUtility";
 import { DATA_EXPLORER_RPC_VERSION } from "Contracts/DataExplorerMessagesContract";
 import { FabricMessageTypes } from "Contracts/FabricMessageTypes";
-import { FABRIC_RPC_VERSION, FabricMessageV2 } from "Contracts/FabricMessagesContract";
+import {
+  ArtifactConnectionInfo,
+  CosmosDbArtifactType,
+  FABRIC_RPC_VERSION,
+  FabricMessageV2,
+  FabricMessageV3,
+  InitializeMessageV3,
+} from "Contracts/FabricMessagesContract";
+import { useDialog } from "Explorer/Controls/Dialog";
 import Explorer from "Explorer/Explorer";
 import { useDataPlaneRbac } from "Explorer/Panes/SettingsPane/SettingsPane";
 import { useSelectedNode } from "Explorer/useSelectedNode";
-import { scheduleRefreshDatabaseResourceToken } from "Platform/Fabric/FabricUtil";
+import { isFabricMirroredKey, scheduleRefreshFabricToken } from "Platform/Fabric/FabricUtil";
 import {
   AppStateComponentNames,
   OPEN_TABS_SUBCOMPONENT_NAME,
@@ -23,7 +31,7 @@ import { AccountKind, Flights } from "../Common/Constants";
 import { normalizeArmEndpoint } from "../Common/EnvironmentUtility";
 import * as Logger from "../Common/Logger";
 import { handleCachedDataMessage, sendMessage, sendReadyMessage } from "../Common/MessageHandler";
-import { Platform, configContext, updateConfigContext } from "../ConfigContext";
+import { configContext, Platform, updateConfigContext } from "../ConfigContext";
 import { ActionType, DataExplorerAction, TabKind } from "../Contracts/ActionContracts";
 import { MessageTypes } from "../Contracts/ExplorerContracts";
 import { DataExplorerInputsFrame } from "../Contracts/ViewModels";
@@ -44,7 +52,7 @@ import {
 } from "../Platform/Hosted/HostedUtils";
 import { extractFeatures } from "../Platform/Hosted/extractFeatures";
 import { DefaultExperienceUtility } from "../Shared/DefaultExperienceUtility";
-import { Node, PortalEnv, updateUserContext, userContext } from "../UserContext";
+import { FabricArtifactInfo, Node, PortalEnv, updateUserContext, userContext } from "../UserContext";
 import {
   acquireMsalTokenForAccount,
   acquireTokenWithMsal,
@@ -104,7 +112,7 @@ export function useKnockoutExplorer(platform: Platform): Explorer {
 
 async function configureFabric(): Promise<Explorer> {
   // These are the versions of Fabric that Data Explorer supports.
-  const SUPPORTED_FABRIC_VERSIONS = [FABRIC_RPC_VERSION];
+  const SUPPORTED_FABRIC_VERSIONS = ["2", FABRIC_RPC_VERSION];
 
   let firstContainerOpened = false;
   let explorer: Explorer;
@@ -120,7 +128,7 @@ async function configureFabric(): Promise<Explorer> {
           return;
         }
 
-        const data: FabricMessageV2 = event.data?.data;
+        const data: FabricMessageV2 | FabricMessageV3 = event.data?.data;
         if (!data) {
           return;
         }
@@ -129,38 +137,77 @@ async function configureFabric(): Promise<Explorer> {
           case "initialize": {
             const fabricVersion = data.version;
             if (!SUPPORTED_FABRIC_VERSIONS.includes(fabricVersion)) {
-              // TODO Surface error to user
+              // TODO Surface error to user and log to telemetry
+              useDialog
+                .getState()
+                .showOkModalDialog("Unsupported Fabric version", `Unsupported Fabric version: ${fabricVersion}`);
+              Logger.logError(`Unsupported Fabric version: ${fabricVersion}`, "Explorer/configureFabric");
               console.error(`Unsupported Fabric version: ${fabricVersion}`);
               return;
             }
 
-            explorer = createExplorerFabric(data.message);
+            if (fabricVersion === "2") {
-            await scheduleRefreshDatabaseResourceToken(true);
+              // ----------------- TODO: Remove this when FabricMessageV2 is deprecated -----------------
-            resolve(explorer);
+              const initializationMessage = data.message as {
-            await explorer.refreshAllDatabases();
+                connectionId: string;
-            if (userContext.fabricContext.isVisible) {
+                isVisible: boolean;
-              firstContainerOpened = true;
+              };
-              openFirstContainer(explorer, userContext.fabricContext.databaseConnectionInfo.databaseId);
+
+              explorer = createExplorerFabricLegacy(initializationMessage, data.version);
+              await scheduleRefreshFabricToken(true);
+              resolve(explorer);
+              await explorer.refreshAllDatabases();
+              if (userContext.fabricContext.isVisible) {
+                firstContainerOpened = true;
+                openFirstContainer(explorer, userContext.fabricContext.databaseName);
+              }
+              // -----------------------------------------------------------------------------------------
+            } else if (fabricVersion === FABRIC_RPC_VERSION) {
+              const initializationMessage = data.message as InitializeMessageV3<CosmosDbArtifactType>;
+              explorer = createExplorerFabric(initializationMessage, data.version);
+
+              if (initializationMessage.artifactType === CosmosDbArtifactType.MIRRORED_KEY) {
+                // Do not show Home tab for Mirrored
+                useTabs.getState().closeReactTab(ReactTabKind.Home);
+              }
+
+              // All tokens used in fabric expire, so schedule a refresh
+              // For Mirrored key, we need the token right away to get the database and containers list.
+              if (isFabricMirroredKey()) {
+                await scheduleRefreshFabricToken(true);
+              } else {
+                scheduleRefreshFabricToken(false);
+              }
+
+              resolve(explorer);
+              await explorer.refreshAllDatabases();
+
+              const { databaseName } = userContext.fabricContext;
+              if (userContext.fabricContext.isVisible && databaseName) {
+                firstContainerOpened = true;
+                openFirstContainer(explorer, databaseName);
+              }
             }
+
             break;
           }
           case "newContainer":
             explorer.onNewCollectionClicked();
             break;
           case "authorizationToken":
-          case "allResourceTokens_v2": {
+          case "allResourceTokens_v2":
+          case "accessToken": {
             handleCachedDataMessage(data);
             break;
           }
           case "explorerVisible": {
             userContext.fabricContext.isVisible = data.message.visible;
-            if (
+            if (userContext.fabricContext.isVisible && !firstContainerOpened) {
-              userContext.fabricContext.isVisible &&
+              const { databaseName } = userContext.fabricContext;
-              !firstContainerOpened &&
+              if (databaseName !== undefined) {
-              userContext?.fabricContext?.databaseConnectionInfo?.databaseId !== undefined
+                firstContainerOpened = true;
-            ) {
+                openFirstContainer(explorer, databaseName);
-              firstContainerOpened = true;
+              }
-              openFirstContainer(explorer, userContext.fabricContext.databaseConnectionInfo.databaseId);
             }
             break;
           }
@@ -420,13 +467,29 @@ function configureHostedWithResourceToken(config: ResourceToken): Explorer {
   return explorer;
 }
 
-function createExplorerFabric(params: { connectionId: string; isVisible: boolean }): Explorer {
+/**
+ * Initialization for FabricMessageV2
+ * TODO: delete when FabricMessageV2 is deprecated
+ * @param params
+ * @returns
+ */
+function createExplorerFabricLegacy(
+  params: { connectionId: string; isVisible: boolean },
+  fabricClientRpcVersion: string,
+): Explorer {
+  const artifactInfo: FabricArtifactInfo[CosmosDbArtifactType.MIRRORED_KEY] = {
+    connectionId: params.connectionId,
+    resourceTokenInfo: undefined,
+  };
+
   updateUserContext({
     fabricContext: {
-      connectionId: params.connectionId,
+      fabricClientRpcVersion,
-      databaseConnectionInfo: undefined,
       isReadOnly: true,
       isVisible: params.isVisible ?? true,
+      databaseName: undefined,
+      artifactType: CosmosDbArtifactType.MIRRORED_KEY,
+      artifactInfo,
     },
     authType: AuthType.ConnectionString,
     databaseAccount: {
@@ -440,11 +503,102 @@ function createExplorerFabric(params: { connectionId: string; isVisible: boolean
       },
     },
   });
-  useTabs.getState().closeAllTabs();
   const explorer = new Explorer();
   return explorer;
 }
 
+/**
+ * Initialization for FabricMessageV3 and above
+ * @param params
+ * @returns
+ */
+const createExplorerFabric = (
+  params: InitializeMessageV3<CosmosDbArtifactType>,
+  fabricClientRpcVersion: string,
+): Explorer => {
+  updateUserContext({
+    fabricContext: {
+      fabricClientRpcVersion,
+      databaseName: undefined,
+      isVisible: params.isVisible,
+      isReadOnly: params.isReadOnly,
+      artifactType: params.artifactType,
+      artifactInfo: undefined,
+    },
+  });
+
+  if (params.artifactType === CosmosDbArtifactType.MIRRORED_KEY) {
+    updateUserContext({
+      authType: AuthType.ConnectionString, // TODO: will need its own type
+      databaseAccount: {
+        id: "",
+        location: "",
+        type: "",
+        name: "Mounted", // TODO: not used?
+        kind: AccountKind.Default,
+        properties: {
+          documentEndpoint: undefined,
+        },
+      },
+      fabricContext: {
+        ...userContext.fabricContext,
+        artifactInfo: {
+          connectionId: (params.artifactConnectionInfo as ArtifactConnectionInfo[CosmosDbArtifactType.MIRRORED_KEY])
+            .connectionId,
+          resourceTokenInfo: undefined,
+        },
+      },
+    });
+  } else if (params.artifactType === CosmosDbArtifactType.MIRRORED_AAD) {
+    updateUserContext({
+      databaseAccount: {
+        id: "",
+        location: "",
+        type: "",
+        name: "Mounted", // TODO: not used?
+        kind: AccountKind.Default,
+        properties: {
+          documentEndpoint: undefined,
+        },
+      },
+      authType: AuthType.AAD,
+      dataPlaneRbacEnabled: true,
+      aadToken: undefined,
+      masterKey: undefined,
+      fabricContext: {
+        ...userContext.fabricContext,
+        artifactInfo: undefined,
+      },
+    });
+  } else if (params.artifactType === CosmosDbArtifactType.NATIVE) {
+    const nativeParams = params as InitializeMessageV3<CosmosDbArtifactType.NATIVE>;
+    // Make it behave like Hosted/AAD/RBAC
+    updateUserContext({
+      databaseAccount: {
+        id: "",
+        location: "",
+        type: "",
+        name: "Native", // TODO: not used?
+        kind: AccountKind.Default,
+        properties: {
+          documentEndpoint: nativeParams.artifactConnectionInfo.accountEndpoint,
+        },
+      },
+      authType: AuthType.AAD,
+      dataPlaneRbacEnabled: true,
+      aadToken: nativeParams.artifactConnectionInfo.accessToken,
+      masterKey: undefined,
+      fabricContext: {
+        ...userContext.fabricContext,
+        databaseName: nativeParams.artifactConnectionInfo.databaseName,
+      },
+    });
+  }
+
+  const explorer = new Explorer();
+  return explorer;
+};
+
 function configureWithEncryptedToken(config: EncryptedToken): Explorer {
   const apiExperience = DefaultExperienceUtility.getDefaultExperienceFromApiKind(config.encryptedTokenMetadata.apiKind);
   updateUserContext({

src/hooks/useTabs.ts

@@ -1,6 +1,7 @@
 import { clamp } from "@fluentui/react";
 import { OpenTab } from "Contracts/ActionContracts";
 import { useSelectedNode } from "Explorer/useSelectedNode";
+import { isFabricMirrored } from "Platform/Fabric/FabricUtil";
 import {
   AppStateComponentNames,
   OPEN_TABS_SUBCOMPONENT_NAME,
@@ -11,7 +12,6 @@ import * as ViewModels from "../Contracts/ViewModels";
 import { CollectionTabKind } from "../Contracts/ViewModels";
 import NotebookTabV2 from "../Explorer/Tabs/NotebookV2Tab";
 import TabsBase from "../Explorer/Tabs/TabsBase";
-import { Platform, configContext } from "./../ConfigContext";
 
 export interface TabsState {
   openedTabs: TabsBase[];
@@ -51,22 +51,11 @@ export enum ReactTabKind {
   QueryCopilot,
 }
 
-// HACK: using this const when the configuration context is not initialized yet.
-// Since Fabric is always setting the url param, use that instead of the regular config.
-const isPlatformFabric = (() => {
-  const params = new URLSearchParams(window.location.search);
-  if (params.has("platform")) {
-    const platform = params.get("platform");
-    return platform === Platform.Fabric;
-  }
-  return false;
-})();
-
 export const useTabs: UseStore<TabsState> = create((set, get) => ({
-  openedTabs: [],
+  openedTabs: [] as TabsBase[],
-  openedReactTabs: !isPlatformFabric ? [ReactTabKind.Home] : [],
+  openedReactTabs: [ReactTabKind.Home],
-  activeTab: undefined,
+  activeTab: undefined as TabsBase,
-  activeReactTab: !isPlatformFabric ? ReactTabKind.Home : undefined,
+  activeReactTab: ReactTabKind.Home,
   queryCopilotTabInitialInput: "",
   isTabExecuting: false,
   isQueryErrorThrown: false,
@@ -122,7 +111,7 @@ export const useTabs: UseStore<TabsState> = create((set, get) => ({
       }
       return true;
     });
-    if (updatedTabs.length === 0 && configContext.platform !== Platform.Fabric) {
+    if (updatedTabs.length === 0 && !isFabricMirrored()) {
       set({ activeTab: undefined, activeReactTab: undefined });
     }
 
@@ -162,7 +151,7 @@ export const useTabs: UseStore<TabsState> = create((set, get) => ({
         }
       });
 
-      if (get().openedTabs.length === 0 && configContext.platform !== Platform.Fabric) {
+      if (get().openedTabs.length === 0 && !isFabricMirrored()) {
         set({ activeTab: undefined, activeReactTab: undefined });
       }
     }