[ZEPPELIN-6366] Separate WebSocket max message size into a dedicated REST API

zeppelin-integration/src/test/java/org/apache/zeppelin/integration/ZeppelinIT.java

@@ -334,6 +334,7 @@ void testAngularRunParagraph() throws Exception {
 
       // Click on 1 paragraph to trigger z.runParagraph() function
 
+      ZeppelinITUtils.sleep(1000, false);
       clickAndWait(By.xpath(getParagraphXPath(1) + "//div[@id=\"angularRunParagraph\"]"));
 
       waitForParagraph(2, "FINISHED");

zeppelin-server/src/main/java/org/apache/zeppelin/rest/ConfigurationsRestApi.java

@@ -32,7 +32,7 @@
 import org.apache.zeppelin.service.AuthenticationService;
 
 /** Configurations Rest API Endpoint. */
-@Path("/configurations")
+@Path("/")
 @Produces("application/json")
 @Singleton
 public class ConfigurationsRestApi extends AbstractRestApi {
@@ -47,7 +47,19 @@ public ConfigurationsRestApi(
   }
 
   @GET
-  @Path("all")
+  @Path("wsMaxMessageSize")
+  @ZeppelinApi
+  public Response getWsMaxMessageSize() {
+    try {
+        int maxMessageSize = configurationService.getWsMaxMessageSize();
+        return new JsonResponse<>(Status.OK, "", maxMessageSize).build();
+        } catch (Exception e) {
+        return new JsonResponse<>(Status.INTERNAL_SERVER_ERROR, "Fail to get max message size", e).build();
+    }
+  }
+
+  @GET
+  @Path("configurations/all")
   @ZeppelinApi
   public Response getAll() {
     try {
@@ -60,7 +72,7 @@ public Response getAll() {
   }
 
   @GET
-  @Path("prefix/{prefix}")
+  @Path("configurations/prefix/{prefix}")
   @ZeppelinApi
   public Response getByPrefix(@PathParam("prefix") final String prefix) {
     try {

zeppelin-server/src/main/java/org/apache/zeppelin/service/ConfigurationService.java

@@ -43,6 +43,10 @@ public Map<String, String> getAllProperties(ServiceContext context,
     return properties;
   }
 
+  public int getWsMaxMessageSize() {
+    return Integer.parseInt(zConf.getWebsocketMaxTextMessageSize());
+  }
+
   public Map<String, String> getPropertiesWithPrefix(String prefix,
                                                      ServiceContext context,
                                                      ServiceCallback<Map<String, String>> callback)

zeppelin-web-angular/src/app/pages/workspace/notebook/action-bar/action-bar.component.ts

@@ -29,7 +29,14 @@ import { NzModalService } from 'ng-zorro-antd/modal';
 import { MessageListener, MessageListenersManager } from '@zeppelin/core';
 import { TRASH_FOLDER_ID_TOKEN } from '@zeppelin/interfaces';
 import { MessageReceiveDataTypeMap, Note, OP, RevisionListItem } from '@zeppelin/sdk';
-import { MessageService, NotebookService, NoteStatusService, SaveAsService, TicketService } from '@zeppelin/services';
+import {
+  ConfigurationService,
+  MessageService,
+  NotebookService,
+  NoteStatusService,
+  SaveAsService,
+  TicketService
+} from '@zeppelin/services';
 import { NoteCreateComponent, ShortcutComponent } from '@zeppelin/share';
 
 @Component({
@@ -191,11 +198,12 @@ export class NotebookActionBarComponent extends MessageListenersManager implemen
     });
   }
 
-  exportNote() {
+  async exportNote() {
     if (!this.ticketService.configuration) {
       throw new Error('Configuration is not loaded');
     }
-    const sizeLimit = +this.ticketService.configuration['zeppelin.websocket.max.text.message.size'];
+
+    const sizeLimit = await this.configurationService.fetchWsMaxMessageSize();
     const jsonContent = JSON.stringify(this.note);
     if (jsonContent.length > sizeLimit) {
       this.nzModalService.confirm({
@@ -326,6 +334,7 @@ export class NotebookActionBarComponent extends MessageListenersManager implemen
     @Inject(TRASH_FOLDER_ID_TOKEN) public TRASH_FOLDER_ID: string,
     private nzModalService: NzModalService,
     private ticketService: TicketService,
+    private configurationService: ConfigurationService,
     private nzMessageService: NzMessageService,
     private router: Router,
     private cdr: ChangeDetectorRef,

zeppelin-web-angular/src/app/services/configuration.service.ts

@@ -13,6 +13,7 @@
 import { HttpClient } from '@angular/common/http';
 import { Injectable } from '@angular/core';
 
+import { Observable } from 'rxjs';
 import { BaseRest } from './base-rest';
 import { BaseUrlService } from './base-url.service';
 
@@ -24,7 +25,11 @@ export class ConfigurationService extends BaseRest {
     super(baseUrlService);
   }
 
-  getAll() {
+  fetchWsMaxMessageSize(): Promise<number> {
+    return this.http.get<number>(this.restUrl`/wsMaxMessageSize`).toPromise();
+  }
+
+  getAll(): Observable<{ [p: string]: string }> {
     return this.http.get<{ [key: string]: string }>(this.restUrl`/configurations/all`);
   }
 }

zeppelin-web-angular/src/app/share/note-import/note-import.component.html

@@ -28,7 +28,7 @@
       <p class="ant-upload-text">Click or drag JSON file to this area to upload</p>
       <p class="ant-upload-hint">
         JSON file size cannot exceed
-        <strong class="tips warning">{{ maxLimit | humanizeBytes }}</strong>
+        <strong class="tips warning">{{ wsMaxLimit | humanizeBytes }}</strong>
       </p>
     </nz-upload>
   </nz-tab>

zeppelin-web-angular/src/app/share/note-import/note-import.component.ts

@@ -12,9 +12,8 @@
 
 import { HttpClient } from '@angular/common/http';
 import { ChangeDetectionStrategy, ChangeDetectorRef, Component, OnInit } from '@angular/core';
-import { MessageService, TicketService } from '@zeppelin/services';
+import { ConfigurationService, MessageService, TicketService } from '@zeppelin/services';
 
-import { get } from 'lodash';
 import { NzModalRef } from 'ng-zorro-antd/modal';
 import { NzUploadFile } from 'ng-zorro-antd/upload';
 
@@ -32,7 +31,7 @@ export class NoteImportComponent extends MessageListenersManager implements OnIn
   importUrl?: string;
   errorText?: string;
   importLoading = false;
-  maxLimit = get(this.ticketService.configuration, ['zeppelin.websocket.max.text.message.size'], null);
+  wsMaxLimit?: number;
 
   @MessageListener(OP.IMPORT_NOTE)
   noteImported(_: MessageReceiveDataTypeMap[OP.IMPORT_NOTE]) {
@@ -59,7 +58,7 @@ export class NoteImportComponent extends MessageListenersManager implements OnIn
 
   beforeUpload = (file: NzUploadFile): boolean => {
     this.errorText = '';
-    if (file.size !== undefined && this.maxLimit && file.size > Number.parseInt(this.maxLimit, 10)) {
+    if (file.size !== undefined && this.wsMaxLimit && file.size > this.wsMaxLimit) {
       this.errorText = 'File size limit Exceeded!';
     } else {
       const reader = new FileReader();
@@ -102,12 +101,15 @@ export class NoteImportComponent extends MessageListenersManager implements OnIn
   constructor(
     public messageService: MessageService,
     private ticketService: TicketService,
+    private configurationService: ConfigurationService,
     private cdr: ChangeDetectorRef,
     private nzModalRef: NzModalRef,
     private httpClient: HttpClient
   ) {
     super(messageService);
   }
 
-  ngOnInit() {}
+  async ngOnInit() {
+    this.wsMaxLimit = await this.configurationService.fetchWsMaxMessageSize();
+  }
 }

zeppelin-web/src/app/notebook/notebook.controller.js

@@ -267,30 +267,29 @@ function NotebookCtrl($scope, $route, $routeParams, $location, $rootScope,
     return note && note.path ? note.path.split('/')[1] === TRASH_FOLDER_ID : false;
   };
 
-  // Export notebook
-  let limit = 0;
+  $scope.exportNote = function() {
+    $http.get(baseUrlSrv.getRestApiBase() + '/wsMaxMessageSize').then(function(response) {
+      const limit = response.data.body;
 
-  websocketMsgSrv.listConfigurations();
-  $scope.$on('configurationsInfo', function(scope, event) {
-    limit = event.configurations['zeppelin.websocket.max.text.message.size'];
-  });
+      let jsonContent = JSON.stringify($scope.note, null, 2);
 
-  $scope.exportNote = function() {
-    let jsonContent = JSON.stringify($scope.note, null, 2);
-    if (jsonContent.length > limit) {
-      BootstrapDialog.confirm({
-        closable: true,
-        title: 'Note size exceeds importable limit (' + limit + ')',
-        message: 'Do you still want to export this note?',
-        callback: function(result) {
-          if (result) {
-            saveAsService.saveAs(jsonContent, $scope.note.name + '_' + $scope.note.id, 'zpln');
-          }
-        },
-      });
-    } else {
-      saveAsService.saveAs(jsonContent, $scope.note.name + '_' + $scope.note.id, 'zpln');
-    }
+      if (jsonContent.length > limit) {
+        BootstrapDialog.confirm({
+          closable: true,
+          title: 'Note size exceeds importable limit (' + limit + ')',
+          message: 'Do you still want to export this note?',
+          callback: function(result) {
+            if (result) {
+              saveAsService.saveAs(jsonContent, $scope.note.name + '_' + $scope.note.id, 'zpln');
+            }
+          },
+        });
+      } else {
+        saveAsService.saveAs(jsonContent, $scope.note.name + '_' + $scope.note.id, 'zpln');
+      }
+    }).catch(function(err) {
+      console.error('Error while fetching max message size', err);
+    });
   };
 
   // Export nbformat

zeppelin-web/src/components/note-import/note-import.controller.js

@@ -16,21 +16,14 @@ import './note-import.css';
 
 angular.module('zeppelinWebApp').controller('NoteImportCtrl', NoteImportCtrl);
 
-function NoteImportCtrl($scope, $timeout, websocketMsgSrv) {
+function NoteImportCtrl($scope, $timeout, websocketMsgSrv, $http, baseUrlSrv) {
   'ngInject';
 
   let vm = this;
   $scope.note = {};
   $scope.note.step1 = true;
   $scope.note.step2 = false;
   $scope.maxLimit = '';
-  let limit = 0;
-
-  websocketMsgSrv.listConfigurations();
-  $scope.$on('configurationsInfo', function(scope, event) {
-    limit = event.configurations['zeppelin.websocket.max.text.message.size'];
-    $scope.maxLimit = Math.round(limit / 1048576);
-  });
 
   vm.resetFlags = function() {
     $scope.note = {};
@@ -53,19 +46,29 @@ function NoteImportCtrl($scope, $timeout, websocketMsgSrv) {
     let file = $scope.note.importFile;
     let reader = new FileReader();
 
-    if (file.size > limit) {
-      $scope.note.errorText = 'File size limit Exceeded!';
-      $scope.$apply();
-      return;
-    }
-
-    reader.onloadend = function() {
-      vm.processImportJson(reader.result);
-    };
+    $http.get(baseUrlSrv.getRestApiBase() + '/wsMaxMessageSize')
+      .then(function(response) {
+        const limit = response.data.body;
 
-    if (file) {
-      reader.readAsText(file);
-    }
+        if (file.size > limit) {
+          $scope.note.errorText = 'File size limit Exceeded!';
+          $scope.$apply();
+          return;
+        }
+
+        reader.onloadend = function() {
+          vm.processImportJson(reader.result);
+        };
+
+        if (file) {
+          reader.readAsText(file);
+        }
+      })
+      .catch(function(err) {
+        console.error('Error while fetching max message size', err);
+        $scope.note.errorText = 'Unable to get upload limit.';
+        $scope.$apply();
+      });
   };
 
   $scope.uploadURL = function() {