fix

lib/content-services/src/lib/aspect-list/aspect-list.service.ts

@@ -29,8 +29,10 @@ import { AspectEntry, AspectPaging, AspectsApi } from '@alfresco/js-api';
 })
 export class AspectListService {
 
+    _aspectsApi: AspectsApi;
     get aspectsApi(): AspectsApi {
-        return new AspectsApi(this.alfrescoApiService.getInstance());
+        this._aspectsApi = this._aspectsApi ?? new AspectsApi(this.alfrescoApiService.getInstance());
+        return this._aspectsApi;
     }
 
     constructor(private alfrescoApiService: AlfrescoApiService,

lib/content-services/src/lib/audit/audit.service.ts

@@ -34,8 +34,10 @@ import { catchError } from 'rxjs/operators';
 })
 export class AuditService {
 
+    _auditApi: AuditApi;
     get auditApi(): AuditApi {
-        return new AuditApi(this.apiService.getInstance());
+        this._auditApi = this._auditApi ?? new AuditApi(this.apiService.getInstance());
+        return this._auditApi;
     }
 
     constructor(private apiService: AlfrescoApiService, private logService: LogService) {
@@ -66,7 +68,7 @@ export class AuditService {
     updateAuditApp(auditApplicationId: string, auditAppBodyUpdate: boolean, opts?: any): Observable<AuditApp | {}> {
         const defaultOptions = {};
         const queryOptions = Object.assign({}, defaultOptions, opts);
-        return from(this.auditApi.updateAuditApp(auditApplicationId, new AuditBodyUpdate({ isEnabled: auditAppBodyUpdate}), queryOptions))
+        return from(this.auditApi.updateAuditApp(auditApplicationId, new AuditBodyUpdate({ isEnabled: auditAppBodyUpdate }), queryOptions))
             .pipe(
                 catchError((err: any) => this.handleError(err))
             );

lib/content-services/src/lib/content-metadata/services/property-descriptors.service.spec.ts

@@ -23,7 +23,7 @@ import { PropertyGroup } from '../interfaces/content-metadata.interfaces';
 import { ContentTestingModule } from '../../testing/content.testing.module';
 import { TranslateModule } from '@ngx-translate/core';
 
-describe('PropertyDescriptorLoaderService', () => {
+fdescribe('PropertyDescriptorLoaderService', () => {
 
     let service: PropertyDescriptorsService;
     let classesApi: ClassesApi;

lib/content-services/src/lib/content-metadata/services/property-descriptors.service.ts

@@ -27,8 +27,10 @@ import { ClassesApi } from '@alfresco/js-api';
 })
 export class PropertyDescriptorsService {
 
+    private _classesApi;
     get classesApi(): ClassesApi {
-        return new ClassesApi(this.alfrescoApiService.getInstance());
+        this._classesApi = this._classesApi ?? new ClassesApi(this.alfrescoApiService.getInstance());
+        return this._classesApi;
     }
 
     constructor(private alfrescoApiService: AlfrescoApiService) {

lib/content-services/src/lib/content-node-share/content-node-share.directive.ts

@@ -44,8 +44,10 @@ export class NodeSharedDirective implements OnChanges, OnDestroy {
 
     private onDestroy$ = new Subject<boolean>();
 
+    _nodesApi: NodesApi;
     get nodesApi(): NodesApi {
-        return new NodesApi(this.alfrescoApiService.getInstance());
+        this._nodesApi = this._nodesApi ?? new NodesApi(this.alfrescoApiService.getInstance());
+        return this._nodesApi;
     }
 
     constructor(

lib/content-services/src/lib/content-type/content-type.service.ts

@@ -25,8 +25,10 @@ import { map } from 'rxjs/operators';
 })
 export class ContentTypeService {
 
+    _typesApi: TypesApi;
     get typesApi(): TypesApi {
-        return new TypesApi(this.alfrescoApiService.getInstance());
+        this._typesApi = this._typesApi ?? new TypesApi(this.alfrescoApiService.getInstance());
+        return this._typesApi;
     }
 
     constructor(private alfrescoApiService: AlfrescoApiService) {

lib/content-services/src/lib/dialogs/library/library.dialog.ts

@@ -72,8 +72,10 @@ export class LibraryDialogComponent implements OnInit, OnDestroy {
     ];
     disableCreateButton = false;
 
+    _queriesApi: QueriesApi;
     get queriesApi(): QueriesApi {
-        return new QueriesApi(this.alfrescoApiService.getInstance());
+        this._queriesApi = this._queriesApi ?? new QueriesApi(this.alfrescoApiService.getInstance());
+        return this._queriesApi;
     }
 
     constructor(

lib/content-services/src/lib/dialogs/node-lock.dialog.ts

@@ -35,8 +35,10 @@ export class NodeLockDialogComponent implements OnInit {
     node: Node = null;
     nodeName: string;
 
+    _nodesApi: NodesApi;
     get nodesApi(): NodesApi {
-        return new NodesApi(this.alfrescoApi.getInstance());
+        this._nodesApi = this._nodesApi ?? new NodesApi(this.apiService.getInstance());
+        return this._nodesApi;
     }
 
     constructor(

lib/content-services/src/lib/document-list/components/document-list.component.ts

@@ -343,8 +343,10 @@ export class DocumentListComponent implements OnInit, OnChanges, OnDestroy, Afte
     private loadingTimeout;
     private onDestroy$ = new Subject<boolean>();
 
+    _nodesApi: NodesApi;
     get nodesApi(): NodesApi {
-        return new NodesApi(this.alfrescoApiService.getInstance());
+        this._nodesApi = this._nodesApi ?? new NodesApi(this.alfrescoApiService.getInstance());
+        return this._nodesApi;
     }
 
     constructor(private documentListService: DocumentListService,

lib/content-services/src/lib/document-list/services/custom-resources.service.ts

@@ -30,7 +30,7 @@ import {
     FavoritesApi,
     SharedlinksApi,
     TrashcanApi,
-    NodesApi
+    NodesApi, TypesApi
 } from '@alfresco/js-api';
 import { Injectable } from '@angular/core';
 import { Observable, from, of, throwError } from 'rxjs';
@@ -41,32 +41,46 @@ export class CustomResourcesService {
 
     private CREATE_PERMISSION = 'create';
 
+    _peopleApi: PeopleApi;
     get peopleApi(): PeopleApi {
-        return new PeopleApi(this.apiService.getInstance());
+        this._peopleApi = this._peopleApi ?? new PeopleApi(this.apiService.getInstance());
+        return this._peopleApi;
     }
 
+    _sitesApi: SitesApi;
     get sitesApi(): SitesApi {
-        return new SitesApi(this.apiService.getInstance());
+        this._sitesApi = this._sitesApi ?? new SitesApi(this.apiService.getInstance());
+        return this._sitesApi;
     }
 
+    _trashcanApi: TrashcanApi;
     get trashcanApi(): TrashcanApi {
-        return new TrashcanApi(this.apiService.getInstance());
+        this._trashcanApi = this._trashcanApi ?? new TrashcanApi(this.apiService.getInstance());
+        return this._trashcanApi;
     }
 
+    _searchApi: SearchApi;
     get searchApi(): SearchApi {
-        return new SearchApi(this.apiService.getInstance());
+        this._searchApi = this._searchApi ?? new SearchApi(this.apiService.getInstance());
+        return this._searchApi;
     }
 
+    _sharedLinksApi: SharedlinksApi;
     get sharedLinksApi(): SharedlinksApi {
-        return new SharedlinksApi(this.apiService.getInstance());
+        this._sharedLinksApi = this._sharedLinksApi ?? new SharedlinksApi(this.apiService.getInstance());
+        return this._sharedLinksApi;
     }
 
+    _favoritesApi: FavoritesApi;
     get favoritesApi(): FavoritesApi {
-        return new FavoritesApi(this.apiService.getInstance());
+        this._favoritesApi = this._favoritesApi ?? new FavoritesApi(this.apiService.getInstance());
+        return this._favoritesApi;
     }
 
+    _nodesApi: NodesApi;
     get nodesApi(): NodesApi {
-        return new NodesApi(this.apiService.getInstance());
+        this._nodesApi = this._nodesApi ?? new NodesApi(this.apiService.getInstance());
+        return this._nodesApi;
     }
 
     constructor(private apiService: AlfrescoApiService, private logService: LogService) {

lib/content-services/src/lib/document-list/services/document-list.service.ts

@@ -34,8 +34,10 @@ export class DocumentListService implements DocumentListLoader {
 
     static ROOT_ID = '-root-';
 
-    get nodes(): NodesApi {
+    _nodesApi: NodesApi;
-        return new NodesApi(this.apiService.getInstance());
+    get nodesApi(): NodesApi {
+        this._nodesApi = this._nodesApi ?? new NodesApi(this.apiService.getInstance());
+        return this._nodesApi;
     }
 
     constructor(private contentService: ContentService,

lib/content-services/src/lib/group/services/group.service.ts

@@ -24,8 +24,10 @@ import { AlfrescoApiService } from '@alfresco/adf-core';
 })
 export class GroupService {
 
+    _groupsApi: GroupsApi;
     get groupsApi(): GroupsApi {
-        return new GroupsApi(this.alfrescoApiService.getInstance());
+        this._groupsApi = this._groupsApi ?? new GroupsApi(this.alfrescoApiService.getInstance());
+        return this._groupsApi;
     }
 
     constructor(

lib/content-services/src/lib/permission-manager/services/node-permission.service.ts

@@ -42,8 +42,10 @@ import { RoleModel } from '../models/role.model';
 })
 export class NodePermissionService {
 
+    _groupsApi: GroupsApi;
     get groupsApi(): GroupsApi {
-        return new GroupsApi(this.apiService.getInstance());
+        this._groupsApi = this._groupsApi ?? new GroupsApi(this.alfrescoApiService.getInstance());
+        return this._groupsApi;
     }
 
     constructor(private apiService: AlfrescoApiService,

lib/content-services/src/lib/search/services/base-query-builder.service.ts

@@ -43,8 +43,10 @@ import { SearchForm } from '../models/search-form.interface';
 })
 export abstract class BaseQueryBuilderService {
 
+    _searchApi: SearchApi;
     get searchApi(): SearchApi {
-        return new SearchApi(this.alfrescoApiService.getInstance());
+        this._searchApi = this._searchApi ?? new SearchApi(this.alfrescoApiService.getInstance());
+        return this._searchApi;
     }
 
     /*  Stream that emits the search configuration whenever the user change the search forms */

lib/content-services/src/lib/social/services/rating.service.ts

@@ -26,8 +26,10 @@ import { catchError } from 'rxjs/operators';
 })
 export class RatingService {
 
+    _ratingsApi: RatingsApi;
     get ratingsApi(): RatingsApi {
-        return new RatingsApi(this.apiService.getInstance());
+        this._ratingsApi = this._ratingsApi ?? new RatingsApi(this.apiService.getInstance());
+        return this._ratingsApi;
     }
 
     constructor(private apiService: AlfrescoApiService, private logService: LogService) {

lib/content-services/src/lib/tag/services/tag.service.ts

@@ -27,8 +27,10 @@ import { TagBody, TagPaging, TagEntry, TagsApi } from '@alfresco/js-api';
 // tslint:disable-next-line: directive-class-suffix
 export class TagService {
 
+    _tagsApi: TagsApi;
     get tagsApi(): TagsApi {
-        return new TagsApi(this.apiService.getInstance());
+        this._tagsApi = this._tagsApi ?? new TagsApi(this.apiService.getInstance());
+        return this._tagsApi;
     }
 
     /** Emitted when tag information is updated. */

lib/content-services/src/lib/version-manager/version-list.component.ts

@@ -32,16 +32,22 @@ import { ConfirmDialogComponent } from '../dialogs/confirm.dialog';
 })
 export class VersionListComponent implements OnChanges {
 
+    _contentApi: ContentApi;
     get contentApi(): ContentApi {
-        return new ContentApi(this.alfrescoApi.getInstance());
+        this._contentApi = this._contentApi ?? new ContentApi(this.apiService.getInstance());
+        return this._contentApi;
     }
 
+    _versionsApi: VersionsApi;
     get versionsApi(): VersionsApi {
-        return new VersionsApi(this.alfrescoApi.getInstance());
+        this._versionsApi = this._versionsApi ?? new VersionsApi(this.apiService.getInstance());
+        return this._versionsApi;
     }
 
+    _nodesApi: NodesApi;
     get nodesApi(): NodesApi {
-        return new NodesApi(this.alfrescoApi.getInstance());
+        this._nodesApi = this._nodesApi ?? new NodesApi(this.apiService.getInstance());
+        return this._nodesApi;
     }
 
     versions: VersionEntry[] = [];

lib/content-services/src/lib/webscript/webscript.component.ts

@@ -45,8 +45,10 @@ import { WebscriptApi } from '@alfresco/js-api';
 })
 export class WebscriptComponent implements OnChanges {
 
+    _webscriptApi: WebscriptApi;
     get webscriptApi(): WebscriptApi {
-        return new WebscriptApi(this.apiService.getInstance());
+        this._webscriptApi = this._webscriptApi ?? new WebscriptApi(this.apiService.getInstance());
+        return this._webscriptApi;
     }
 
     /** (required) Path to the webscript (as defined by webscript). */

lib/core/directives/library-favorite.directive.ts

@@ -39,8 +39,10 @@ export class LibraryFavoriteDirective implements OnChanges {
 
     private targetLibrary = null;
 
+    _favoritesApi: FavoritesApi;
     get favoritesApi(): FavoritesApi {
-        return new FavoritesApi(this.alfrescoApiService.getInstance());
+        this._favoritesApi = this._favoritesApi ?? new FavoritesApi(this.alfrescoApiService.getInstance());
+        return this._favoritesApi;
     }
 
     @HostListener('click')

lib/core/directives/library-membership.directive.ts

@@ -48,8 +48,10 @@ export class LibraryMembershipDirective implements OnChanges {
 
     isJoinRequested: BehaviorSubject<boolean> = new BehaviorSubject<boolean>(false);
 
+    _sitesApi: SitesApi;
     get sitesApi(): SitesApi {
-        return new SitesApi(this.alfrescoApiService.getInstance());
+        this._sitesApi = this._sitesApi ?? new SitesApi(this.alfrescoApiService.getInstance());
+        return this._sitesApi;
     }
 
     /** Site for which to toggle the membership request. */

lib/core/directives/node-delete.directive.ts

@@ -62,12 +62,16 @@ export class NodeDeleteDirective implements OnChanges {
     @Output()
     delete: EventEmitter<any> = new EventEmitter();
 
+    _trashcanApi: TrashcanApi;
     get trashcanApi(): TrashcanApi {
-        return new TrashcanApi(this.alfrescoApiService.getInstance());
+        this._trashcanApi = this._trashcanApi ?? new TrashcanApi(this.apiService.getInstance());
+        return this._trashcanApi;
     }
 
+    _nodesApi: NodesApi;
     get nodesApi(): NodesApi {
-        return new NodesApi(this.alfrescoApiService.getInstance());
+        this._nodesApi = this._nodesApi ?? new NodesApi(this.apiService.getInstance());
+        return this._nodesApi;
     }
 
     @HostListener('click')

lib/core/directives/node-download.directive.ts

@@ -31,8 +31,10 @@ import { DownloadService } from '../services/download.service';
 })
 export class NodeDownloadDirective {
 
+    _contentApi: ContentApi;
     get contentApi(): ContentApi {
-        return new ContentApi(this.apiService.getInstance());
+        this._contentApi = this._contentApi ?? new ContentApi(this.apiService.getInstance());
+        return this._contentApi;
     }
 
     /** Nodes to download. */

lib/core/directives/node-favorite.directive.ts

@@ -30,8 +30,10 @@ import { catchError, map } from 'rxjs/operators';
 export class NodeFavoriteDirective implements OnChanges {
     favorites: any[] = [];
 
+    _favoritesApi: FavoritesApi;
     get favoritesApi(): FavoritesApi {
-        return new FavoritesApi(this.alfrescoApiService.getInstance());
+        this._favoritesApi = this._favoritesApi ?? new FavoritesApi(this.alfrescoApiService.getInstance());
+        return this._favoritesApi;
     }
 
     /** Array of nodes to toggle as favorites. */

lib/core/directives/node-restore.directive.ts

@@ -36,8 +36,10 @@ export class RestoreMessageModel {
 export class NodeRestoreDirective {
     private readonly restoreProcessStatus;
 
+    _trashcanApi: TrashcanApi;
     get trashcanApi(): TrashcanApi {
-        return new TrashcanApi(this.alfrescoApiService.getInstance());
+        this._trashcanApi = this._trashcanApi ?? new TrashcanApi(this.apiService.getInstance());
+        return this._trashcanApi;
     }
 
     /** Array of deleted nodes to restore. */

lib/core/form/services/activiti-alfresco.service.ts

@@ -23,7 +23,7 @@ import {
     IntegrationAlfrescoOnPremiseApi,
     MinimalNode,
     RelatedContentRepresentation,
-    ActivitiContentApi
+    ActivitiContentApi, UserProfileApi
 } from '@alfresco/js-api';
 import { Observable, from, throwError } from 'rxjs';
 import { ExternalContent } from '../components/widgets/core/external-content';
@@ -35,11 +35,16 @@ import { map, catchError } from 'rxjs/operators';
 })
 export class ActivitiContentService {
 
+    _integrationAlfrescoOnPremiseApi: IntegrationAlfrescoOnPremiseApi;
     get integrationAlfrescoOnPremiseApi(): IntegrationAlfrescoOnPremiseApi {
-        return new IntegrationAlfrescoOnPremiseApi(this.apiService.getInstance());
+        this._integrationAlfrescoOnPremiseApi= this._integrationAlfrescoOnPremiseApi ?? new IntegrationAlfrescoOnPremiseApi(this.apiService.getInstance());
+        return this._integrationAlfrescoOnPremiseApi;
     }
+
+    _contentApi: ActivitiContentApi;
     get contentApi(): ActivitiContentApi {
-        return new ActivitiContentApi(this.apiService.getInstance());
+        this._contentApi = this._contentApi ?? new ActivitiContentApi(this.apiService.getInstance());
+        return this._contentApi;
     }
 
     static UNKNOWN_ERROR_MESSAGE: string = 'Unknown error';

lib/core/form/services/ecm-model.service.ts

@@ -32,8 +32,10 @@ export class EcmModelService {
     public static MODEL_NAME: string = 'activitiFormsModel';
     public static TYPE_MODEL: string = 'cm:folder';
 
+    _customModelApi: CustomModelApi;
     get customModelApi(): CustomModelApi {
-        return new CustomModelApi(this.apiService.getInstance());
+        this._customModelApi = this._customModelApi ?? new CustomModelApi(this.apiService.getInstance());
+        return this._customModelApi;
     }
 
     constructor(private apiService: AlfrescoApiService,

lib/core/form/services/form.service.ts

@@ -52,40 +52,58 @@ export class FormService {
     static UNKNOWN_ERROR_MESSAGE: string = 'Unknown error';
     static GENERIC_ERROR_MESSAGE: string = 'Server error';
 
-    get taskApi(): TasksApi {
+    _taskFormsApi: TaskFormsApi;
-        return new TasksApi(this.apiService.getInstance());
-    }
-
     get taskFormsApi(): TaskFormsApi {
-        return new TaskFormsApi(this.apiService.getInstance());
+        this._taskFormsApi = this._taskFormsApi ?? new TaskFormsApi(this.apiService.getInstance());
+        return this._taskFormsApi;
     }
 
+    _taskApi: TasksApi;
+    get taskApi(): TasksApi {
+        this._taskApi = this._taskApi ?? new TasksApi(this.apiService.getInstance());
+        return this._taskApi;
+    }
+
+    _modelsApi: ModelsApi;
     get modelsApi(): ModelsApi {
-        return new ModelsApi(this.apiService.getInstance());
+        this._modelsApi = this._modelsApi ?? new ModelsApi(this.apiService.getInstance());
+        return this._modelsApi;
     }
 
+    _editorApi: FormModelsApi;
     get editorApi(): FormModelsApi {
-        return new FormModelsApi(this.apiService.getInstance());
+        this._editorApi = this._editorApi ?? new FormModelsApi(this.apiService.getInstance());
+        return this._editorApi;
     }
 
+    _processDefinitionsApi: ProcessDefinitionsApi;
     get processDefinitionsApi(): ProcessDefinitionsApi {
-        return new ProcessDefinitionsApi(this.apiService.getInstance());
+        this._processDefinitionsApi = this._processDefinitionsApi ?? new ProcessDefinitionsApi(this.apiService.getInstance());
+        return this._processDefinitionsApi;
     }
 
+    _processInstanceVariablesApi: ProcessInstanceVariablesApi;
     get processInstanceVariablesApi(): ProcessInstanceVariablesApi {
-        return new ProcessInstanceVariablesApi(this.apiService.getInstance());
+        this._processInstanceVariablesApi = this._processInstanceVariablesApi ?? new ProcessInstanceVariablesApi(this.apiService.getInstance());
+        return this._processInstanceVariablesApi;
     }
 
+    _processInstancesApi: ProcessInstancesApi;
     get processInstancesApi(): ProcessInstancesApi {
-        return new ProcessInstancesApi(this.apiService.getInstance());
+        this._processInstancesApi= this._processInstancesApi ?? new ProcessInstancesApi(this.apiService.getInstance());
+        return this._processInstancesApi;
     }
 
+    _groupsApi: ActivitiGroupsApi;
     get groupsApi(): ActivitiGroupsApi {
-        return new ActivitiGroupsApi(this.apiService.getInstance());
+        this._groupsApi = this._groupsApi ?? new ActivitiGroupsApi(this.apiService.getInstance());
+        return this._groupsApi;
     }
 
+    _usersApi: UsersApi;
     get usersApi(): UsersApi {
-        return new UsersApi(this.apiService.getInstance());
+        this._usersApi = this._usersApi ?? new UsersApi(this.apiService.getInstance());
+        return this._usersApi;
     }
 
     formLoaded = new Subject<FormEvent>();

lib/core/form/services/process-content.service.ts

@@ -18,7 +18,7 @@
 import { AlfrescoApiService } from '../../services/alfresco-api.service';
 import { LogService } from '../../services/log.service';
 import { Injectable } from '@angular/core';
-import { ActivitiContentApi, RelatedContentRepresentation } from '@alfresco/js-api';
+import { ActivitiContentApi, ContentApi, RelatedContentRepresentation } from '@alfresco/js-api';
 import { Observable, from, throwError } from 'rxjs';
 import { catchError } from 'rxjs/operators';
 
@@ -30,8 +30,10 @@ export class ProcessContentService {
     static UNKNOWN_ERROR_MESSAGE: string = 'Unknown error';
     static GENERIC_ERROR_MESSAGE: string = 'Server error';
 
-    get contentApi(): ActivitiContentApi {
+    _contentApi: ContentApi;
-        return new ActivitiContentApi(this.apiService.getInstance());
+    get contentApi(): ContentApi {
+        this._contentApi = this._contentApi ?? new ContentApi(this.apiService.getInstance());
+        return this._contentApi;
     }
 
     constructor(private apiService: AlfrescoApiService,

lib/core/form/services/widget-visibility.service.ts

@@ -30,15 +30,17 @@ import {
 import { TaskProcessVariableModel } from '../models/task-process-variable.model';
 import { WidgetVisibilityModel, WidgetTypeEnum } from '../models/widget-visibility.model';
 import { map, catchError } from 'rxjs/operators';
-import { TaskFormsApi } from '@alfresco/js-api';
+import { RuntimeAppDefinitionsApi, TaskFormsApi } from '@alfresco/js-api';
 
 @Injectable({
     providedIn: 'root'
 })
 export class WidgetVisibilityService {
 
+    _taskFormsApi: TaskFormsApi;
     get taskFormsApi(): TaskFormsApi {
-        return new TaskFormsApi(this.apiService.getInstance());
+        this._taskFormsApi = this._taskFormsApi ?? new TaskFormsApi(this.apiService.getInstance());
+        return this._taskFormsApi;
     }
 
     private processVarList: TaskProcessVariableModel[];

lib/core/services/apps-process.service.ts

@@ -27,8 +27,10 @@ import { map, catchError } from 'rxjs/operators';
 })
 export class AppsProcessService {
 
+    _appsApi: RuntimeAppDefinitionsApi;
     get appsApi(): RuntimeAppDefinitionsApi {
-        return new RuntimeAppDefinitionsApi(this.apiService.getInstance());
+        this._appsApi = this._appsApi ?? new RuntimeAppDefinitionsApi(this.apiService.getInstance());
+        return this._appsApi;
     }
 
     constructor(private apiService: AlfrescoApiService,

lib/core/services/authentication.service.ts

@@ -48,8 +48,10 @@ export class AuthenticationService {
      */
     onLogout: ReplaySubject<any> = new ReplaySubject<any>(1);
 
+    _profileApi: UserProfileApi;
     get profileApi(): UserProfileApi {
-        return new UserProfileApi(this.alfrescoApi.getInstance());
+        this._profileApi = this._profileApi ?? new UserProfileApi(this.alfrescoApi.getInstance());
+        return this._profileApi;
     }
 
     constructor(

lib/core/services/bpm-user.service.ts

@@ -33,8 +33,10 @@ import { UserProfileApi, UserRepresentation } from '@alfresco/js-api';
 })
 export class BpmUserService {
 
+    _profileApi: UserProfileApi;
     get profileApi(): UserProfileApi {
-        return new UserProfileApi(this.apiService.getInstance());
+        this._profileApi = this._profileApi ?? new UserProfileApi(this.apiService.getInstance());
+        return this._profileApi;
     }
 
     constructor(private apiService: AlfrescoApiService,

lib/core/services/comment-content.service.ts

@@ -28,8 +28,10 @@ import { CommentEntry, CommentsApi } from '@alfresco/js-api';
 })
 export class CommentContentService {
 
+    _commentsApi: CommentsApi;
     get commentsApi(): CommentsApi {
-        return new CommentsApi(this.apiService.getInstance());
+        this._commentsApi = this._commentsApi ?? new CommentsApi(this.apiService.getInstance());
+        return this._commentsApi;
     }
 
     constructor(private apiService: AlfrescoApiService,

lib/core/services/comment-process.service.ts

@@ -29,8 +29,10 @@ import { ActivitiCommentsApi } from '@alfresco/js-api';
 })
 export class CommentProcessService {
 
+    _commentsApi: ActivitiCommentsApi;
     get commentsApi(): ActivitiCommentsApi {
-        return new ActivitiCommentsApi(this.apiService.getInstance());
+        this._commentsApi = this._commentsApi ?? new ActivitiCommentsApi(this.apiService.getInstance());
+        return this._commentsApi;
     }
 
     constructor(private apiService: AlfrescoApiService,

lib/core/services/content.service.ts

@@ -38,12 +38,16 @@ export class ContentService {
     folderCreate: Subject<MinimalNode> = new Subject<MinimalNode>();
     folderEdit: Subject<MinimalNode> = new Subject<MinimalNode>();
 
+    _contentApi: ContentApi;
     get contentApi(): ContentApi {
-        return new ContentApi(this.apiService.getInstance());
+        this._contentApi = this._contentApi ?? new ContentApi(this.apiService.getInstance());
+        return this._contentApi;
     }
 
+    _nodesApi: NodesApi;
     get nodesApi(): NodesApi {
-        return new NodesApi(this.apiService.getInstance());
+        this._nodesApi = this._nodesApi ?? new NodesApi(this.apiService.getInstance());
+        return this._nodesApi;
     }
 
     constructor(public authService: AuthenticationService,

lib/core/services/deleted-nodes-api.service.ts

@@ -28,12 +28,16 @@ import { catchError } from 'rxjs/operators';
 })
 export class DeletedNodesApiService {
 
+    _nodesApi: NodesApi;
     get nodesApi(): NodesApi {
-        return new NodesApi(this.apiService.getInstance());
+        this._nodesApi = this._nodesApi ?? new NodesApi(this.apiService.getInstance());
+        return this._nodesApi;
     }
 
+    _trashcanApi: TrashcanApi;
     get trashcanApi(): TrashcanApi {
-        return new TrashcanApi(this.apiService.getInstance());
+        this._trashcanApi = this._trashcanApi ?? new TrashcanApi(this.apiService.getInstance());
+        return this._trashcanApi;
     }
 
     constructor(

lib/core/services/download-zip.service.ts

@@ -27,8 +27,10 @@ import { catchError } from 'rxjs/operators';
 })
 export class DownloadZipService {
 
+    _downloadsApi: DownloadsApi;
     get downloadsApi(): DownloadsApi {
-        return new DownloadsApi(this.apiService.getInstance());
+        this._downloadsApi = this._downloadsApi ?? new DownloadsApi(this.apiService.getInstance());
+        return this._downloadsApi;
     }
 
     constructor(private apiService: AlfrescoApiService,

lib/core/services/ecm-user.service.ts

@@ -28,16 +28,16 @@ import { PeopleApi } from '@alfresco/js-api';
 })
 export class EcmUserService {
 
-    private _peopleApi: PeopleApi;
+    _peopleApi: PeopleApi;
+    get peopleApi(): PeopleApi {
+        this._peopleApi = this._peopleApi ?? new PeopleApi(this.apiService.getInstance());
+        return this._peopleApi;
+    }
 
     constructor(private apiService: AlfrescoApiService,
                 private contentService: ContentService) {
     }
 
-    get peopleApi(): PeopleApi {
-        return this._peopleApi || (this._peopleApi = new PeopleApi(this.apiService.getInstance()));
-    }
-
     /**
      * Gets information about a user identified by their username.
      * @param userName Target username

lib/core/services/external-alfresco-api.service.ts

@@ -20,7 +20,7 @@ import {
     AlfrescoApiCompatibility,
     ContentApi,
     Core,
-    Node
+    Node, NodesApi
 } from '@alfresco/js-api';
 import { ReplaySubject, Subject } from 'rxjs';
 
@@ -46,8 +46,10 @@ export class ExternalAlfrescoApiService {
         return this.getInstance().content;
     }
 
-    get nodesApi(): Core.NodesApi {
+    _nodesApi: NodesApi;
-        return this.getInstance().nodes;
+    get nodesApi(): NodesApi {
+        this._nodesApi = this._nodesApi ?? new NodesApi(this.apiService.getInstance());
+        return this._nodesApi;
     }
 
     init(ecmHost: string, contextRoot: string) {

lib/core/services/favorites-api.service.ts

@@ -27,8 +27,10 @@ import { catchError } from 'rxjs/operators';
 })
 export class FavoritesApiService {
 
+    _favoritesApi: FavoritesApi;
     get favoritesApi(): FavoritesApi {
-        return new FavoritesApi(this.apiService.getInstance());
+        this._favoritesApi = this._favoritesApi ?? new FavoritesApi(this.apiService.getInstance());
+        return this._favoritesApi;
     }
 
     static remapEntry({ entry }: any): any {

lib/core/services/nodes-api.service.ts

@@ -28,12 +28,16 @@ import { NodeMetadata } from '../models/node-metadata.model';
 })
 export class NodesApiService {
 
+    _trashcanApi: TrashcanApi;
     get trashcanApi(): TrashcanApi {
-        return new TrashcanApi(this.apiService.getInstance());
+        this._trashcanApi = this._trashcanApi ?? new TrashcanApi(this.apiService.getInstance());
+        return this._trashcanApi;
     }
 
+    _nodesApi: NodesApi;
     get nodesApi(): NodesApi {
-        return new NodesApi(this.apiService.getInstance());
+        this._nodesApi = this._nodesApi ?? new NodesApi(this.apiService.getInstance());
+        return this._nodesApi;
     }
 
     constructor(private apiService: AlfrescoApiService,

lib/core/services/people-content.service.ts

@@ -50,8 +50,10 @@ export class PeopleContentService {
     private hasContentAdminRole: boolean = false;
     hasCheckedIsContentAdmin: boolean = false;
 
+    _peopleApi: PeopleApi;
     get peopleApi(): PeopleApi {
-        return new PeopleApi(this.apiService.getInstance());
+        this._peopleApi = this._peopleApi ?? new PeopleApi(this.apiService.getInstance());
+        return this._peopleApi;
     }
 
     constructor(private apiService: AlfrescoApiService, private logService: LogService) {

lib/core/services/people-process.service.ts

@@ -24,7 +24,7 @@ import { catchError, map } from 'rxjs/operators';
 import {
     TaskActionsApi,
     UsersApi,
-    ResultListDataRepresentationLightUserRepresentation
+    ResultListDataRepresentationLightUserRepresentation, DownloadsApi
 } from '@alfresco/js-api';
 
 @Injectable({
@@ -32,12 +32,16 @@ import {
 })
 export class PeopleProcessService {
 
+    _taskActionsApi: TaskActionsApi;
     get taskActionsApi(): TaskActionsApi {
-        return new TaskActionsApi(this.apiService.getInstance());
+        this._taskActionsApi = this._taskActionsApi ?? new TaskActionsApi(this.apiService.getInstance());
+        return this._taskActionsApi;
     }
 
+    _userApi: UsersApi;
     get userApi(): UsersApi {
-        return new UsersApi(this.apiService.getInstance());
+        this._userApi = this._userApi ?? new UsersApi(this.apiService.getInstance());
+        return this._userApi;
     }
 
     constructor(private apiService: AlfrescoApiService,

lib/core/services/renditions.service.ts

@@ -26,12 +26,16 @@ import { concatMap, switchMap, takeWhile, map } from 'rxjs/operators';
 })
 export class RenditionsService {
 
+    _renditionsApi: RenditionsApi;
     get renditionsApi(): RenditionsApi {
-        return new RenditionsApi(this.apiService.getInstance());
+        this._renditionsApi = this._renditionsApi ?? new RenditionsApi(this.apiService.getInstance());
+        return this._renditionsApi;
     }
 
+    _contentApi: ContentApi;
     get contentApi(): ContentApi {
-        return new ContentApi(this.apiService.getInstance());
+        this._contentApi = this._contentApi ?? new ContentApi(this.apiService.getInstance());
+        return this._contentApi;
     }
 
     constructor(private apiService: AlfrescoApiService) {

lib/core/services/search.service.ts

@@ -28,12 +28,16 @@ export class SearchService {
 
     dataLoaded: Subject<ResultSetPaging> = new Subject();
 
+    _queriesApi: QueriesApi;
     get queriesApi(): QueriesApi {
-        return new QueriesApi(this.apiService.getInstance());
+        this._queriesApi = this._queriesApi ?? new QueriesApi(this.apiService.getInstance());
+        return this._queriesApi;
     }
 
+    _searchApi: SearchApi;
     get searchApi(): SearchApi {
-        return new SearchApi(this.apiService.getInstance());
+        this._searchApi = this._searchApi ?? new SearchApi(this.apiService.getInstance());
+        return this._searchApi;
     }
 
     constructor(private apiService: AlfrescoApiService,

lib/core/services/shared-links-api.service.ts

@@ -29,8 +29,10 @@ export class SharedLinksApiService {
 
     error = new Subject<{ statusCode: number, message: string }>();
 
+    _sharedLinksApi: SharedlinksApi;
     get sharedLinksApi(): SharedlinksApi {
-        return new SharedlinksApi(this.apiService.getInstance());
+        this._sharedLinksApi = this._sharedLinksApi ?? new SharedlinksApi(this.apiService.getInstance());
+        return this._sharedLinksApi;
     }
 
     constructor(private apiService: AlfrescoApiService,

lib/core/services/sites.service.ts

@@ -40,8 +40,10 @@ import { LogService } from './log.service';
 })
 export class SitesService {
 
+    _sitesApi: SitesApi;
     get sitesApi(): SitesApi {
-        return new SitesApi(this.apiService.getInstance());
+        this._sitesApi = this._sitesApi ?? new SitesApi(this.apiService.getInstance());
+        return this._sitesApi;
     }
 
     constructor(private apiService: AlfrescoApiService, private logService: LogService) {

lib/core/services/thumbnail.service.ts

@@ -164,8 +164,10 @@ export class ThumbnailService {
         'task': './assets/images/task.svg'
     };
 
+    _contentApi: ContentApi;
     get contentApi(): ContentApi {
-        return new ContentApi(this.apiService.getInstance());
+        this._contentApi = this._contentApi ?? new ContentApi(this.apiService.getInstance());
+        return this._contentApi;
     }
 
     constructor(protected apiService: AlfrescoApiService, matIconRegistry: MatIconRegistry, sanitizer: DomSanitizer) {

lib/core/services/upload.service.ts

@@ -63,16 +63,22 @@ export class UploadService {
     fileUploadDeleted: Subject<FileUploadDeleteEvent> = new Subject<FileUploadDeleteEvent>();
     fileDeleted: Subject<string> = new Subject<string>();
 
+    _uploadApi: UploadApi;
     get uploadApi(): UploadApi {
-        return new UploadApi(this.apiService.getInstance());
+        this._uploadApi = this._uploadApi ?? new UploadApi(this.apiService.getInstance());
+        return this._uploadApi;
     }
 
+    _nodesApi: NodesApi;
     get nodesApi(): NodesApi {
-        return new NodesApi(this.apiService.getInstance());
+        this._nodesApi = this._nodesApi ?? new NodesApi(this.apiService.getInstance());
+        return this._nodesApi;
     }
 
+    _versionsApi: VersionsApi;
     get versionsApi(): VersionsApi {
-        return new VersionsApi(this.apiService.getInstance());
+        this._versionsApi = this._versionsApi ?? new VersionsApi(this.apiService.getInstance());
+        return this._versionsApi;
     }
 
     constructor(

lib/core/viewer/components/viewer.component.ts

@@ -257,20 +257,28 @@ export class ViewerComponent implements OnChanges, OnInit, OnDestroy {
     private shouldCloseViewer = true;
     private keyDown$ = fromEvent<KeyboardEvent>(document, 'keydown');
 
+    _sharedLinksApi: SharedlinksApi;
     get sharedLinksApi(): SharedlinksApi {
-        return new SharedlinksApi(this.apiService.getInstance());
+        this._sharedLinksApi = this._sharedLinksApi ?? new SharedlinksApi(this.apiService.getInstance());
+        return this._sharedLinksApi;
     }
 
+    _versionsApi: VersionsApi;
     get versionsApi(): VersionsApi {
-        return new VersionsApi(this.apiService.getInstance());
+        this._versionsApi = this._versionsApi ?? new VersionsApi(this.apiService.getInstance());
+        return this._versionsApi;
     }
 
+    _nodesApi: NodesApi;
     get nodesApi(): NodesApi {
-        return new NodesApi(this.apiService.getInstance());
+        this._nodesApi = this._nodesApi ?? new NodesApi(this.apiService.getInstance());
+        return this._nodesApi;
     }
 
+    _contentApi: ContentApi;
     get contentApi(): ContentApi {
-        return new ContentApi(this.apiService.getInstance());
+        this._contentApi = this._contentApi ?? new ContentApi(this.apiService.getInstance());
+        return this._contentApi;
     }
 
     constructor(private apiService: AlfrescoApiService,

lib/core/viewer/services/view-util.service.ts

@@ -74,16 +74,22 @@ export class ViewUtilService {
     viewerTypeChange: Subject<string> = new Subject<string>();
     urlFileContentChange: Subject<string> = new Subject<string>();
 
+    _renditionsApi: RenditionsApi;
     get renditionsApi(): RenditionsApi {
-        return new RenditionsApi(this.apiService.getInstance());
+        this._renditionsApi = this._renditionsApi ?? new RenditionsApi(this.apiService.getInstance());
+        return this._renditionsApi;
     }
 
+    _contentApi: ContentApi;
     get contentApi(): ContentApi {
-        return new ContentApi(this.apiService.getInstance());
+        this._contentApi = this._contentApi ?? new ContentApi(this.apiService.getInstance());
+        return this._contentApi;
     }
 
+    _versionsApi: VersionsApi;
     get versionsApi(): VersionsApi {
-        return new VersionsApi(this.apiService.getInstance());
+        this._versionsApi = this._versionsApi ?? new VersionsApi(this.apiService.getInstance());
+        return this._versionsApi;
     }
 
     constructor(private apiService: AlfrescoApiService,

lib/insights/src/lib/analytics-process/services/analytics.service.ts

@@ -33,12 +33,16 @@ import { ProcessDefinitionsApi, ReportApi } from '@alfresco/js-api';
 @Injectable({ providedIn: 'root' })
 export class AnalyticsService {
 
+    _reportApi: ReportApi;
     get reportApi(): ReportApi {
-        return new ReportApi(this.apiService.getInstance());
+        this._reportApi = this._reportApi ?? new ReportApi(this.apiService.getInstance());
+        return this._reportApi;
     }
 
+    _processDefinitionsApi: ProcessDefinitionsApi;
     get processDefinitionsApi(): ProcessDefinitionsApi {
-        return new ProcessDefinitionsApi(this.apiService.getInstance());
+        this._processDefinitionsApi = this._processDefinitionsApi ?? new ProcessDefinitionsApi(this.apiService.getInstance());
+        return this._processDefinitionsApi;
     }
 
     constructor(private apiService: AlfrescoApiService,

lib/insights/src/lib/diagram/services/diagrams.service.ts

@@ -24,8 +24,10 @@ import { ModelJsonBpmnApi } from '@alfresco/js-api';
 @Injectable({ providedIn: 'root' })
 export class DiagramsService {
 
+    _modelJsonBpmnApi: ModelJsonBpmnApi;
     get modelJsonBpmnApi(): ModelJsonBpmnApi {
-        return new ModelJsonBpmnApi(this.apiService.getInstance());
+        this._modelJsonBpmnApi = this._modelJsonBpmnApi ?? new ModelJsonBpmnApi(this.apiService.getInstance());
+        return this._modelJsonBpmnApi;
     }
 
     constructor(private apiService: AlfrescoApiService,

lib/process-services-cloud/src/lib/form/components/widgets/attach-file/attach-file-cloud-widget.component.ts

@@ -67,8 +67,10 @@ export class AttachFileCloudWidgetComponent extends UploadCloudWidgetComponent i
     rootNodeId = AttachFileCloudWidgetComponent.ALIAS_USER_FOLDER;
     selectedNode: Node;
 
+    _nodesApi: NodesApi;
     get nodesApi(): NodesApi {
-        return new NodesApi(this.apiService.getInstance());
+        this._nodesApi = this._nodesApi ?? new NodesApi(this.apiService.getInstance());
+        return this._nodesApi;
     }
 
     constructor(

lib/process-services-cloud/src/lib/form/services/content-cloud-node-selector.service.ts

@@ -31,8 +31,10 @@ import { Observable, Subject, throwError } from 'rxjs';
 })
 export class ContentCloudNodeSelectorService {
 
+    _nodesApi: NodesApi;
     get nodesApi(): NodesApi {
-        return new NodesApi(this.apiService.getInstance());
+        this._nodesApi = this._nodesApi ?? new NodesApi(this.apiService.getInstance());
+        return this._nodesApi;
     }
 
     sourceNodeNotFound = false;

lib/process-services-cloud/src/lib/form/services/form-cloud.service.ts

@@ -36,8 +36,10 @@ import { FormContent } from '../../services/form-fields.interfaces';
 })
 export class FormCloudService extends BaseCloudService {
 
+    private _uploadApi;
     get uploadApi(): UploadApi {
-        return new UploadApi(this.apiService.getInstance());
+        this._uploadApi = this._uploadApi ?? new UploadApi(this.apiService.getInstance());
+        return this._uploadApi;
     }
 
     constructor(

lib/process-services-cloud/src/lib/form/services/process-cloud-content.service.ts

@@ -31,12 +31,16 @@ import { AuthenticationApi, Node, UploadApi } from '@alfresco/js-api';
 })
 export class ProcessCloudContentService {
 
+    private _uploadApi;
     get uploadApi(): UploadApi {
-        return new UploadApi(this.apiService.getInstance());
+        this._uploadApi = this._uploadApi ?? new UploadApi(this.apiService.getInstance());
+        return this._uploadApi;
     }
 
-    get authenticationApi(): AuthenticationApi {
+    private _authenticationApi
-        return new AuthenticationApi(this.apiService.getInstance());
+    get authenticationApi(): UploadApi {
+        this._authenticationApi = this._authenticationApi ?? new AuthenticationApi(this.apiService.getInstance());
+        return this._authenticationApi;
     }
 
     constructor(

lib/process-services/src/lib/process-list/services/process-filter.service.ts

@@ -30,8 +30,10 @@ import {
 })
 export class ProcessFilterService {
 
+    private _userFiltersApi;
     get userFiltersApi(): UserFiltersApi {
-        return new UserFiltersApi(this.alfrescoApiService.getInstance());
+        this._userFiltersApi = this._userFiltersApi ?? new UserFiltersApi(this.alfrescoApiService.getInstance());
+        return this._userFiltersApi;
     }
 
     constructor(private alfrescoApiService: AlfrescoApiService) {

lib/process-services/src/lib/process-list/services/process.service.ts

@@ -23,7 +23,7 @@ import {
     ProcessInstancesApi,
     RestVariable,
     ProcessInstanceRepresentation,
-    ProcessInstanceVariablesApi
+    ProcessInstanceVariablesApi, ActivitiContentApi
 } from '@alfresco/js-api';
 import { Observable, from, throwError, of } from 'rxjs';
 import { TaskDetailsModel } from '../../task-list';
@@ -42,20 +42,28 @@ declare let moment: any;
 })
 export class ProcessService {
 
-    get processInstanceVariablesApi(): ProcessInstanceVariablesApi {
+    private _tasksApi;
-        return new ProcessInstanceVariablesApi(this.alfrescoApiService.getInstance());
-    }
-
-    get processInstancesApi(): ProcessInstancesApi {
-        return new ProcessInstancesApi(this.alfrescoApiService.getInstance());
-    }
-
-    get processDefinitionsApi(): ProcessDefinitionsApi {
-        return new ProcessDefinitionsApi(this.alfrescoApiService.getInstance());
-    }
-
     get tasksApi(): TasksApi {
-        return new TasksApi(this.alfrescoApiService.getInstance());
+        this._tasksApi = this._tasksApi ?? new TasksApi(this.alfrescoApiService.getInstance());
+        return this._tasksApi;
+    }
+
+    private _processDefinitionsApi;
+    get processDefinitionsApi(): ProcessDefinitionsApi {
+        this._processDefinitionsApi = this._processDefinitionsApi ?? new ProcessDefinitionsApi(this.alfrescoApiService.getInstance());
+        return this._processDefinitionsApi;
+    }
+
+    private _processInstancesApi;
+    get processInstancesApi(): ProcessInstancesApi {
+        this._processInstancesApi = this._processInstancesApi ?? new ProcessInstancesApi(this.alfrescoApiService.getInstance());
+        return this._processInstancesApi;
+    }
+
+    private _processInstanceVariablesApi;
+    get processInstanceVariablesApi(): ProcessInstanceVariablesApi {
+        this._processInstanceVariablesApi = this._processInstanceVariablesApi ?? new ProcessInstanceVariablesApi(this.alfrescoApiService.getInstance());
+        return this._processInstanceVariablesApi;
     }
 
     constructor(private alfrescoApiService: AlfrescoApiService) {

lib/process-services/src/lib/task-list/services/process-upload.service.ts

@@ -25,8 +25,10 @@ import { throwError } from 'rxjs';
 })
 export class ProcessUploadService extends UploadService {
 
+    private _contentApi;
     get contentApi(): ActivitiContentApi {
-        return new ActivitiContentApi(this.apiService.getInstance());
+        this._contentApi = this._contentApi ?? new ActivitiContentApi(this.apiService.getInstance());
+        return this._contentApi;
     }
 
     constructor(protected apiService: AlfrescoApiService, appConfigService: AppConfigService, discoveryApiService: DiscoveryApiService) {

lib/process-services/src/lib/task-list/services/task-filter.service.ts

@@ -20,15 +20,17 @@ import { Injectable } from '@angular/core';
 import { Observable, forkJoin, from, throwError } from 'rxjs';
 import { FilterRepresentationModel } from '../models/filter.model';
 import { map, catchError } from 'rxjs/operators';
-import { UserFiltersApi } from '@alfresco/js-api';
+import { ActivitiContentApi, UserFiltersApi } from '@alfresco/js-api';
 
 @Injectable({
     providedIn: 'root'
 })
 export class TaskFilterService {
 
-    get userFiltersApi(): UserFiltersApi {
+    private _userFiltersApi;
-        return new UserFiltersApi(this.apiService.getInstance());
+    get userFiltersApi(): ActivitiContentApi {
+        this._userFiltersApi = this._userFiltersApi ?? new UserFiltersApi(this.apiService.getInstance());
+        return this._userFiltersApi;
     }
 
     constructor(private apiService: AlfrescoApiService,

lib/process-services/src/lib/task-list/services/task-upload.service.ts

@@ -25,8 +25,10 @@ import { ActivitiContentApi } from '@alfresco/js-api';
 })
 export class TaskUploadService extends UploadService {
 
+    private _contentApi;
     get contentApi(): ActivitiContentApi {
-        return new ActivitiContentApi(this.apiService.getInstance());
+        this._contentApi = this._contentApi ?? new ActivitiContentApi(this.apiService.getInstance());
+        return this._contentApi;
     }
 
     constructor(protected apiService: AlfrescoApiService, appConfigService: AppConfigService, discoveryApiService: DiscoveryApiService) {

lib/process-services/src/lib/task-list/services/tasklist.service.ts

@@ -34,20 +34,28 @@ import {
 })
 export class TaskListService {
 
-    get modelsApi(): ModelsApi {
+    private _modelsApi;
-        return new ModelsApi(this.apiService.getInstance());
+    get modelsApi(): TasksApi {
+        this._modelsApi = this._modelsApi ?? new ModelsApi(this.apiService.getInstance());
+        return this._modelsApi;
     }
 
+    private _tasksApi;
     get tasksApi(): TasksApi {
-        return new TasksApi(this.apiService.getInstance());
+        this._tasksApi = this._tasksApi ?? new TasksApi(this.apiService.getInstance());
+        return this._tasksApi;
     }
 
+    private _taskActionsApi;
     get taskActionsApi(): TaskActionsApi {
-        return new TaskActionsApi(this.apiService.getInstance());
+        this._taskActionsApi = this._taskActionsApi ?? new TaskActionsApi(this.apiService.getInstance());
+        return this._taskActionsApi;
     }
 
+    private _checklistsApi;
     get checklistsApi(): ChecklistsApi {
-        return new ChecklistsApi(this.apiService.getInstance());
+        this._checklistsApi = this._checklistsApi ?? new ChecklistsApi(this.apiService.getInstance());
+        return this._checklistsApi;
     }
 
     constructor(private apiService: AlfrescoApiService,