dev: migrate DatabaseFSEntryFetcher to puterfs module

src/backend/src/filesystem/FilesystemService.js

@@ -18,7 +18,6 @@
  */
 // TODO: database access can be a service
 const { RESOURCE_STATUS_PENDING_CREATE } = require('../modules/puterfs/ResourceService.js');
-const DatabaseFSEntryFetcher = require("./storage/DatabaseFSEntryFetcher");
 const { TraceService } = require('../services/TraceService.js');
 const FSAccessContext = require('./FSAccessContext.js');
 const PerformanceMonitor = require('../monitor/PerformanceMonitor.js');
@@ -49,11 +48,6 @@ class FilesystemService extends BaseService {
 
         services.registerService('traceService', TraceService);
 
-        // TODO: [fs:remove-separate-updater-and-fetcher]
-        services.set('fsEntryFetcher', new DatabaseFSEntryFetcher({
-            services: services,
-        }));
-
         // The new fs entry service
         this.log = services.get('log-service').create('filesystem-service');
 

src/backend/src/modules/puterfs/DatabaseFSEntryFetcher.js

@@ -17,16 +17,11 @@
  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  */
 const { DB_READ } = require("../../services/database/consts");
-const { abtest } = require("../../util/otelutil");
-const { NodePathSelector, NodeUIDSelector, NodeInternalIDSelector, NodeChildSelector, RootNodeSelector } = require("../node/selectors");
-
-module.exports = class DatabaseFSEntryFetcher {
-    constructor ({ services }) {
-        this.services = services;
-        this.log = services.get('log-service').create('DatabaseFSEntryFetcher');
-
-        this.db = services.get('database').get(DB_READ, 'filesystem');
+const { NodePathSelector, NodeUIDSelector, NodeInternalIDSelector, NodeChildSelector, RootNodeSelector } = require("../../filesystem/node/selectors");
+const BaseService = require("../../services/BaseService");
 
+module.exports = class DatabaseFSEntryFetcher extends BaseService {
+    _construct () {
         this.defaultProperties = [
             'id',
             'associated_app_id',
@@ -57,6 +52,10 @@ module.exports = class DatabaseFSEntryFetcher {
         ]
     }
 
+    _init () {
+        this.db = this.services.get('database').get(DB_READ, 'filesystem');
+    }
+
     async find (selector, fetch_entry_options) {
         if ( selector instanceof RootNodeSelector ) {
             return selector.entry;

src/backend/src/modules/puterfs/PuterFSModule.js

@@ -15,6 +15,9 @@ class PuterFSModule extends AdvancedBase {
         
         const { MountpointService } = require('./MountpointService');
         services.registerService('mountpoint', MountpointService);
+        
+        const DatabaseFSEntryFetcher = require("./DatabaseFSEntryFetcher");
+        services.registerService('fsEntryFetcher', DatabaseFSEntryFetcher);
     }
 }