Hastic datasource #120 (#198)

build/webpack.base.conf.js

@@ -11,7 +11,8 @@ module.exports = {
   context: resolve('src'),
   entry: {
     './module': './module.ts',
-    './panel/graph_panel/module': './panel/graph_panel/graph_ctrl.ts'
+    './panel/graph_panel/module': './panel/graph_panel/graph_ctrl.ts',
+    './datasource/module': './datasource/module.ts'
   },
   output: {
     filename: '[name].js',
@@ -35,7 +36,8 @@ module.exports = {
       { from: 'plugin.json' },
       { from: 'img/*' },
       { from: 'panel/graph_panel/plugin.json', to: 'panel/graph_panel/plugin.json' },
-      { from: 'panel/graph_panel/partials/*' }
+      { from: 'panel/graph_panel/partials/*' },
+      { from: 'datasource/plugin.json', to: 'datasource/plugin.json' },
     ])
   ],
   resolve: {

src/config/config_ctrl.ts

@@ -1,36 +1,13 @@
 import template from './template.html';
-import { normalizeUrl } from '../utlis';
 
 class ConfigCtrl {
   static template = template;
   appModel: any;
-  appEditCtrl: any;
 
   constructor() {
     if(this.appModel.jsonData === undefined) {
       this.appModel.jsonData = {};
     }
-
-    this.appEditCtrl.setPreUpdateHook(this.preUpdate.bind(this));
-    this.appEditCtrl.setPostUpdateHook(this.postUpdate.bind(this));
-  }
-
-  preUpdate() {
-    this.normalizeUrl();
-    return Promise.resolve();
-  }
-
-  postUpdate() {
-    // TODO: check whether hasticServerUrl is accessible
-    if(!this.appModel.enabled) {
-      return Promise.resolve();
-    }
-
-    return { message: 'Hastic app installed!' };
-  }
-
-  normalizeUrl() {
-    this.appModel.jsonData.hasticServerUrl = normalizeUrl(this.appModel.jsonData.hasticServerUrl);
   }
 }
 

src/config/template.html

@@ -1,12 +1 @@
-<h3 class="page-heading">Enter your Hastic config</h3>
-<div class="gf-form-group">
-  <div class="gf-form">
-    <label class="gf-form-label width-10">Hastic server url</label>
-    <input 
-      type="text" 
-      class="gf-form-input max-width-20" 
-      ng-model="ctrl.appModel.jsonData.hasticServerUrl"
-      ng-blur="ctrl.normalizeUrl"
-    />
-  </div>
-</div>
+

src/datasource/config_ctrl.ts

@@ -0,0 +1,33 @@
+import { normalizeUrl } from '../utlis';
+import configTemplate from './partials/config.html';
+
+
+export class HasticConfigCtrl {
+  public static template = configTemplate;
+  public ACCESS_OPTIONS = [
+    { key: 'proxy', value: 'Server (Default)' },
+    { key: 'direct', value: 'Browser' }
+  ];
+
+  public showAccessHelp = false;
+
+  constructor(private $scope: any) {
+    if(this.$scope.current === undefined) {
+      this.$scope.current = {
+        url: '',
+        access: 'proxy'
+      };
+    }
+  }
+
+  normalizeUrl() {
+    if(this.$scope.current.url === '') {
+      return;
+    }
+    this.$scope.current.url = normalizeUrl(this.$scope.current.url);
+  }
+
+  toggleAccessHelp() {
+    this.showAccessHelp = !this.showAccessHelp;
+  }
+}

src/datasource/datasource.ts

@@ -0,0 +1,37 @@
+import HasticAPI from './hastic_api';
+
+import { BackendSrv } from 'grafana/app/core/services/backend_srv';
+
+export class HasticDatasource {
+  private hastic: HasticAPI;
+
+  /** @ngInject */
+  constructor(instanceSettings: any, backendSrv: BackendSrv) {
+    this.hastic = new HasticAPI(instanceSettings, backendSrv);
+  }
+
+  async query(options: any) {
+    console.log(options);
+  }
+
+  async testDatasource() {
+    try {
+      await this.hastic.get('/');
+      // TODO: check if it is hastic
+      return {
+        status: 'success', title: 'Success',
+        message: 'Datasource is working'
+      };
+    } catch(err) {
+      console.error(err);
+      return {
+        status: 'error', title: 'Error',
+        message: 'Hastic connection error'
+      };
+    }
+  }
+
+  metricFindQuery(options: any) {
+    return [];
+  }
+}

src/datasource/hastic_api.ts

@@ -0,0 +1,29 @@
+import { BackendSrv } from 'grafana/app/core/services/backend_srv';
+
+export default class HasticAPI {
+  private url: string;
+
+  constructor(instanceSettings: any, private backendSrv: BackendSrv) {
+    this.url = instanceSettings.url;
+  }
+
+  get(url: string, params?: any) {
+    return this._query('GET', url, params);
+  }
+
+  private async _query(method: string, url: string, data?: any) {
+    method = method.toUpperCase();
+    let options: any = {
+      method,
+      url: this.url + url
+    };
+    if(method === 'GET' || method === 'DELETE') {
+      options.params = data;
+    } else {
+      options.data = data;
+    }
+
+    const response = await this.backendSrv.datasourceRequest(options);
+    return response.data;
+  }
+}

src/datasource/module.ts

@@ -0,0 +1,10 @@
+import { HasticDatasource } from './datasource';
+import { HasticQueryCtrl } from './query_ctrl';
+import { HasticConfigCtrl } from './config_ctrl';
+
+
+export {
+  HasticDatasource as Datasource,
+  HasticConfigCtrl as ConfigCtrl,
+  HasticQueryCtrl as QueryCtrl
+};

src/datasource/partials/config.html

@@ -0,0 +1,87 @@
+<div class="gf-form-group">
+  <h3 class="page-heading">HTTP</h3>
+  <div class="gf-form-group">
+    <div class="gf-form-inline">
+      <div class="gf-form max-width-30">
+        <span class="gf-form-label width-10">Hastic Server URL</span>
+        <input
+          class="gf-form-input" type="text"
+          placeholder="http://localhost:8000"
+          ng-model='ctrl.current.url'
+          min-length="0"
+          ng-pattern="/^(ftp|http|https):\/\/(\w+:{0,1}\w*@)?(\S+)(:[0-9]+)?(\/|\/([\w#!:.?+=&%@!\-\/]))?$/"
+          required
+          ng-blur="ctrl.normalizeUrl()"
+        />
+        <info-popover mode="right-absolute">
+          <p>Specify a complete Hastic Server HTTP URL (for example http://your_hastic_server:8000)</p>
+          <span ng-show="ctrl.current.access === 'direct'">
+            Your access method is <em>Browser</em>, this means the URL
+            needs to be accessible from the browser.
+          </span>
+          <span ng-show="ctrl.current.access === 'proxy'">
+            Your access method is <em>Server</em>, this means the URL
+            needs to be accessible from the grafana backend/server.
+          </span>
+        </info-popover>
+      </div>
+    </div>
+
+    <div class="gf-form-inline">
+      <div class="gf-form max-width-30">
+        <span class="gf-form-label width-10">Access</span>
+        <div class="gf-form-select-wrapper max-width-24">
+          <select
+            class="gf-form-input"
+            ng-model="ctrl.current.access"
+            ng-options="f.key as f.value for f in ctrl.ACCESS_OPTIONS"
+          />
+        </div>
+      </div>
+      <div class="gf-form">
+        <label class="gf-form-label query-keyword pointer" ng-click="ctrl.toggleAccessHelp()">
+          Help&nbsp;
+          <i class="fa fa-caret-down" ng-show="ctrl.showAccessHelp"></i>
+          <i class="fa fa-caret-right" ng-hide="ctrl.showAccessHelp">&nbsp;</i>
+        </label>
+      </div>
+    </div>
+
+    <div class="grafana-info-box m-t-2" ng-show="ctrl.showAccessHelp">
+      <p>
+        Access mode controls how requests to the data source will be handled.
+        <strong><i>Server</i></strong> access mode should be the preferred way if nothing else stated.
+      </p>
+      <div class="alert-title">Server access mode (Default):</div>
+      <p>
+        All requests will be made from the browser to Grafana backend/server which in turn will
+        forward the requests to the data source and by that circumvent possible 
+        Cross-Origin Resource Sharing (CORS) requirements.
+        The URL needs to be accessible from the grafana backend/server if you select this access mode.
+      </p>
+      <div class="alert-title">Browser access mode:</div>
+      <p>
+        All requests will be made from the browser directly to the data source and may be subject to
+        Cross-Origin Resource Sharing (CORS) requirements. The URL needs to be accessible from the browser
+        if you select this access mode.
+      </p>
+    </div>
+
+    <div class="gf-form-inline" ng-if="ctrl.current.access=='proxy'">
+      <div class="gf-form">
+        <span class="gf-form-label width-10">Whitelisted Cookies</span>
+        <bootstrap-tagsinput 
+          ng-model="ctrl.current.jsonData.keepCookies"
+          width-class="width-20" tagclass="label label-tag"
+          placeholder="Add Name"
+        />
+        <info-popover mode="right-absolute">
+          Grafana Proxy deletes forwarded cookies by default. Specify cookies by name
+          that should be forwarded to the data source.
+        </info-popover>
+      </div>
+    </div>
+  </div>
+</div>
+
+

src/datasource/plugin.json

@@ -0,0 +1,12 @@
+{
+  "type": "datasource",
+  "name": "Hastic Datasource",
+  "id": "corpglory-hastic-datasource",
+  "metrics": true,
+  "info": {
+    "logos": {
+      "small": "../corpglory-hastic-app/img/icn-graph-panel.png",
+      "large": "../corpglory-hastic-app/img/icn-graph-panel.png"
+    }
+  }
+}

src/datasource/query_ctrl.ts

@@ -0,0 +1,12 @@
+import template from './partials/query_ctrl.html';
+
+import { QueryCtrl } from 'grafana/app/plugins/sdk';
+
+export class HasticQueryCtrl extends QueryCtrl {
+  static template = template;
+
+  /** @ngInject */
+  constructor($scope, $injector) {
+    super($scope, $injector);
+  }
+}

src/panel/graph_panel/controllers/analytic_controller.ts

@@ -430,6 +430,9 @@ export class AnalyticController {
     );
 
     for await (const data of statusGenerator) {
+      if(data === undefined) {
+        break;
+      }
       let status = data.status;
       let error = data.errorMessage;
       if(analyticUnit.status !== status) {

src/panel/graph_panel/graph_ctrl.ts

@@ -29,7 +29,6 @@ class GraphCtrl extends MetricsPanelCtrl {
   seriesList: any = [];
   dataList: any = [];
 
-  _backendUrl: string = undefined;
   // annotations: any = [];
 
   private _datasourceRequest: DatasourceRequest;
@@ -51,10 +50,15 @@ class GraphCtrl extends MetricsPanelCtrl {
   _panelInfo: PanelInfo;
 
   private _analyticUnitTypes: any;
+  private _hasticDatasources: any[];
+
+  private $graphElem: any;
+  private $legendElem: any;
 
   panelDefaults = {
     // datasource name, null = default datasource
     datasource: null,
+    hasticDatasource: null,
     // sets client side (flot) or native graphite png renderer (png)
     renderer: 'flot',
     yaxes: [
@@ -180,20 +184,16 @@ class GraphCtrl extends MetricsPanelCtrl {
     this.rebindKeys();
   }
 
-  async getBackendURL(): Promise<string> {
-    if(this._backendUrl !== undefined) {
-      return this._backendUrl;
-    }
-    var data = await this.backendSrv.get('api/plugins/corpglory-hastic-app/settings');
-    if(data.jsonData === undefined || data.jsonData === null) {
-      return undefined;
-    }
-    let val = data.jsonData.hasticServerUrl;
-    if(val === undefined || val === null) {
-      return undefined;
+  getBackendURL(): string {
+    const datasourceId = this.panel.hasticDatasource;
+    if(datasourceId !== undefined && datasourceId !== null) {
+      const datasource = _.find(this._hasticDatasources, { id: datasourceId });
+      if(datasource.access === 'proxy') {
+        return `/api/datasources/proxy/${datasource.id}`;
+      }
+      return datasource.url;
     }
-    val = val.replace(/\/+$/, "");
-    return val;
+    return undefined;
   }
 
   async updateAnalyticUnitTypes() {
@@ -210,53 +210,34 @@ class GraphCtrl extends MetricsPanelCtrl {
     return _.keys(this._analyticUnitTypes);
   }
 
-  private _checkBackendUrlOk(backendURL: string): boolean {
-    if(backendURL === null || backendURL === undefined || backendURL === '') {
-      appEvents.emit(
-        'alert-warning',
-        [
-          `hasticServerUrl is missing`,
-          `Please set it in config. More info: https://github.com/hastic/hastic-grafana-app/wiki/Getting-started`
-        ]
-      );
-      return false;
-    }
-    return true;
-  }
-
   async runBackendConnectivityCheck() {
-    let backendURL = await this.getBackendURL();
-    if(!this._checkBackendUrlOk(backendURL)) {
-      return;
+    const backendURL = this.getBackendURL();
+
+    try {
+      const connected = await this.analyticService.isBackendOk();
+      if(connected) {
+        this.updateAnalyticUnitTypes();
+        appEvents.emit(
+          'alert-success',
+          [
+            'Connected to Hastic server',
+            `Hastic server: "${backendURL}"`
+          ]
+        );
+      }
     }
-    let connected = await this.analyticService.isBackendOk();
-    if(connected) {
-      this.updateAnalyticUnitTypes();
-      appEvents.emit(
-        'alert-success',
-        [
-          'Connected to Hastic server',
-          `Hastic server: "${backendURL}"`
-        ]
-      );
+    catch(err) {
+      console.error(err);
     }
   }
 
   async link(scope, elem, attrs, ctrl) {
+    this._datasources = {};
 
-    this.processor = new DataProcessor(this.panel);
-
-    let backendURL = await this.getBackendURL();
-    if(!this._checkBackendUrlOk(backendURL)) {
-      return;
-    }
-
-    this.analyticService = new AnalyticService(backendURL, this.$http);
-
-    this.runBackendConnectivityCheck();
-
-    this.analyticsController = new AnalyticController(this.panel, this.analyticService, this.events);
+    this.$graphElem = $(elem[0]).find('#graphPanel');
+    this.$legendElem = $(elem[0]).find('#graphLegend');
 
+    this.onHasticDatasourceChange();
 
     this.events.on('render', this.onRender.bind(this));
     this.events.on('data-received', this.onDataReceived.bind(this));
@@ -281,8 +262,6 @@ class GraphCtrl extends MetricsPanelCtrl {
       this.$scope.$digest();
     });
 
-    this._datasources = {};
-
     appEvents.on('ds-request-response', data => {
       let requestConfig = data.config;
 
@@ -294,19 +273,6 @@ class GraphCtrl extends MetricsPanelCtrl {
         type: undefined
       };
     });
-
-    this.analyticsController.fetchAnalyticUnitsStatuses();
-
-
-    var $graphElem = $(elem[0]).find('#graphPanel');
-    var $legendElem = $(elem[0]).find('#graphLegend');
-    this._graphRenderer = new GraphRenderer(
-      $graphElem, this.timeSrv, this.contextSrv, this.$scope
-    );
-    this._graphLegend = new GraphLegend($legendElem, this.popoverSrv, this.$scope);
-
-    this._updatePanelInfo();
-    this.analyticsController.updateServerInfo();
   }
 
   onInitEditMode() {
@@ -329,6 +295,27 @@ class GraphCtrl extends MetricsPanelCtrl {
     actions.push({ text: 'Toggle legend', click: 'ctrl.toggleLegend()' });
   }
 
+  async onHasticDatasourceChange() {
+    this.processor = new DataProcessor(this.panel);
+
+    await this._fetchHasticDatasources();
+    const backendURL = this.getBackendURL();
+
+    this.analyticService = new AnalyticService(backendURL, this.$http);
+    this.runBackendConnectivityCheck();
+    this.analyticsController = new AnalyticController(this.panel, this.analyticService, this.events);
+
+    this.analyticsController.fetchAnalyticUnitsStatuses();
+
+    this._graphRenderer = new GraphRenderer(
+      this.$graphElem, this.timeSrv, this.contextSrv, this.$scope
+    );
+    this._graphLegend = new GraphLegend(this.$legendElem, this.popoverSrv, this.$scope);
+
+    this._updatePanelInfo();
+    this.analyticsController.updateServerInfo();
+  }
+
   issueQueries(datasource) {
     // this.annotationsPromise = this.annotationsSrv.getAnnotations({
     //   dashboard: this.dashboard,
@@ -385,15 +372,17 @@ class GraphCtrl extends MetricsPanelCtrl {
       }
     }
 
-    var loadTasks = [
-      // this.annotationsPromise,
-      this.analyticsController.fetchAnalyticUnitsSegments(+this.range.from, +this.range.to)
-    ];
+    if(this.analyticsController !== undefined) {
+      var loadTasks = [
+        // this.annotationsPromise,
+        this.analyticsController.fetchAnalyticUnitsSegments(+this.range.from, +this.range.to)
+      ];
 
-    var results =  await Promise.all(loadTasks);
-    this.loading = false;
-    // this.annotations = results[0].annotations;
-    this.render(this.seriesList);
+      await Promise.all(loadTasks);
+      this.loading = false;
+      // this.annotations = results[0].annotations;
+      this.render(this.seriesList);
+    }
 
   }
 
@@ -657,7 +646,7 @@ class GraphCtrl extends MetricsPanelCtrl {
 
   private async _updatePanelInfo() {
     const datasource = await this._getDatasourceByName(this.panel.datasource);
-    const backendUrl = await this.getBackendURL();
+    const backendUrl = this.getBackendURL();
 
     let grafanaVersion = 'unknown';
     if(_.has(window, 'grafanaBootData.settings.buildInfo.version')) {
@@ -691,6 +680,16 @@ class GraphCtrl extends MetricsPanelCtrl {
     }
   }
 
+  private async _fetchHasticDatasources() {
+    this._hasticDatasources = await this.backendSrv.get('/api/datasources');
+    this._hasticDatasources = this._hasticDatasources.filter(ds => ds.type === 'corpglory-hastic-datasource');
+    this.$scope.$digest();
+  }
+
+  get hasticDatasources() {
+    return this._hasticDatasources;
+  }
+
   get panelInfo() {
     return this._panelInfo;
   }

src/panel/graph_panel/models/info.ts

@@ -2,9 +2,9 @@ export type ServerInfo = {
   nodeVersion: string,
   packageVersion: string,
   npmUserAgent: string,
-  docker: boolean,
+  docker: string | boolean,
   zmqConectionString: string,
-  serverPort: number,
+  serverPort: string | number,
   gitBranch: string,
   gitCommitHash: string
 }

src/panel/graph_panel/partials/tab_analytics.html

@@ -1,210 +1,224 @@
-<div class="gf-form-button-row" ng-if="ctrl.analyticsController.serverStatus === false">
-  <h5>Hastic server at "{{ctrl.backendURL}}" is not available</h5>
-  <button class="btn btn-inverse" ng-click="ctrl.runBackendConnectivityCheck()">
-    <i class="fa fa-plug"></i>
-    Reconnect to Hastic server
-  </button>
+<div class="gf-form-group">
+  <div class="gf-form">
+    <label class="gf-form-label">Select Hastic datasource</label>
+    <select class="gf-form-input max-width-15"
+      ng-model="ctrl.panel.hasticDatasource"
+      ng-options="ds.id as ds.name for ds in ctrl.hasticDatasources"
+      ng-change="ctrl.onHasticDatasourceChange()"
+    />
+  </div>
 </div>
 
-<div ng-if="ctrl.analyticsController.serverStatus === true">
-  <h5> Analytic Units </h5>
-  <div class="editor-row">
-    <div class="gf-form" ng-repeat="analyticUnit in ctrl.analyticsController.analyticUnits">
-
-      <label class="gf-form-label width-5">
-        <i class="fa fa-info" bs-tooltip="'Analytic unit id: ' + analyticUnit.id"></i>
-        &nbsp; Name
-      </label>
-      <input
-        type="text" class="gf-form-input max-width-15"
-        ng-model="analyticUnit.name"
-        ng-change="ctrl.onAnalyticUnitNameChange(analyticUnit)"
-      >
-
-      <label class="gf-form-label width-4"> Type </label>
-      <div class="gf-form-select-wrapper">
-        <select class="gf-form-input width-10"
-          ng-model="analyticUnit.type"
-          ng-options="type.value as type.name for type in ctrl.analyticUnitTypes[analyticUnit.detectorType]"
-          ng-disabled="true"
-        />
-      </div>
-
-      <!--
-      <label class="gf-form-label width-6"> Confidence </label>
-      <input
-        type="number" class="gf-form-input width-5 ng-valid ng-scope ng-empty ng-dirty ng-valid-number ng-touched"
-        placeholder="auto" bs-tooltip="'Override automatic decimal precision for legend and tooltips'"
-        data-placement="right" ng-model="ctrl.panel.decimals" ng-change="ctrl.render()" ng-model-onblur="" data-original-title="" title=""
-      />
-      -->
-
-      <label class="gf-form-label width-8"> Positive Color </label>
-      <span class="gf-form-label">
-        <color-picker
-          color="analyticUnit.labeledColor"
-          onChange="ctrl.onColorChange.bind(ctrl, analyticUnit.id, false)"
-        />
-      </span>
-
-      <!-- Hack to avoid Grafana's .gf-form-label + .gf-form-label css. Fix for https://github.com/hastic/hastic-grafana-app/issues/192 -->
-      <div ng-if="analyticUnit.detectorType === 'pattern'"></div>
-
-      <label ng-if="analyticUnit.detectorType === 'pattern'" class="gf-form-label width-8"> Negative Color </label>
-      <span ng-if="analyticUnit.detectorType === 'pattern'"  class="gf-form-label">
-        <color-picker
-          color="analyticUnit.deletedColor"
-          onChange="ctrl.onColorChange.bind(ctrl, analyticUnit.id, true)"
-        />
-      </span>
-
-      <label
-        class="gf-form-label"
-        ng-if="analyticUnit.detectorType === 'pattern'"
-        ng-style="analyticUnit.status === 'LEARNING' && { 'cursor': 'not-allowed' }"
-      >
-        <a class="pointer" tabindex="1"
-          ng-click="ctrl.onToggleLabelingMode(analyticUnit.id)"
-          ng-disabled="analyticUnit.status === 'LEARNING'"
-        >
-          <i class="fa fa-bar-chart" ng-if="!analyticUnit.saving"></i>
-          <i class="fa fa-spinner fa-spin" ng-if="analyticUnit.saving"></i>
-          <b ng-if="analyticUnit.saving" ng-disabled="true"> saving... </b>
-        </a>
-      </label>
-
-      <select class="gf-form-input width-10"
-        ng-model="ctrl.analyticsController.labelingMode"
-        ng-options="type.value as type.name for type in [
-          { name:'Label Positive', value: 'LABELING' }, 
-          { name:'Label Negative', value: 'DELETING' },
-          { name:'Unlabel', value: 'UNLABELING' }
-        ]"
-        ng-if="analyticUnit.selected && !analyticUnit.saving"
-        ng-disabled="analyticUnit.status === 'LEARNING'"
-      />
-
-      <select class="gf-form-input width-7"
-        ng-model="ctrl.analyticsController.getThreshold(analyticUnit.id).condition"
-        ng-options="type for type in ctrl.analyticsController.conditions"
-        ng-if="analyticUnit.detectorType === 'threshold'"
-      />
-      <input
-        class="gf-form-input width-5"
-        type="number"
-        ng-model="ctrl.analyticsController.getThreshold(analyticUnit.id).value"
-        ng-if="
-          analyticUnit.detectorType === 'threshold' &&
-          ctrl.analyticsController.getThreshold(analyticUnit.id).condition != 'NO_DATA'
-        "
-      />
-      <!-- TODO set .saving flag to thresholds, when learning is in progress -->
-      <button
-        class="btn btn-inverse"
-        ng-if="analyticUnit.detectorType === 'threshold'"
-        ng-click="ctrl.analyticsController.sendThresholdParamsToServer(analyticUnit.id)"
-        ng-disabled="analyticUnit.status === 'PENDING' || analyticUnit.status === 'LEARNING'"
-        >
-        Apply
-      </button>
+<div class="gf-form">
+  <div class="gf-form-button-row" ng-if="ctrl.analyticsController.serverStatus === false">
+    <h5>Hastic server at "{{ctrl.backendURL}}" is not available</h5>
+    <button class="btn btn-inverse" ng-click="ctrl.runBackendConnectivityCheck()">
+      <i class="fa fa-plug"></i>
+      Reconnect to Hastic server
+    </button>
+  </div>
 
-      <label class="gf-form-label" ng-hide="analyticUnit.selected">
-        <a
-          ng-if="analyticUnit.visible"
-          bs-tooltip="'Hide. It`s visible now.'"
-          ng-click="ctrl.onToggleVisibility(analyticUnit.id)"
-          class="pointer"
-        >
-          <i class="fa fa-eye"></i>
-        </a>
-
-        <a
-          ng-if="!analyticUnit.visible"
-          bs-tooltip="'Show. It`s hidden now.'"
-          ng-click="ctrl.onToggleVisibility(analyticUnit.id)"
-          class="pointer"
+  <div ng-if="ctrl.analyticsController.serverStatus === true">
+    <h5> Analytic Units </h5>
+    <div class="editor-row">
+      <div class="gf-form" ng-repeat="analyticUnit in ctrl.analyticsController.analyticUnits">
+
+        <label class="gf-form-label width-5">
+          <i class="fa fa-info" bs-tooltip="'Analytic unit id: ' + analyticUnit.id"></i>
+          &nbsp; Name
+        </label>
+        <input
+          type="text" class="gf-form-input max-width-15"
+          ng-model="analyticUnit.name"
+          ng-change="ctrl.onAnalyticUnitNameChange(analyticUnit)"
         >
-          <i class="fa fa-eye-slash"></i>
-        </a>
-      </label>
-
-      <label class="gf-form-label">
-        <a
-          ng-if="!analyticUnit.selected"
-          ng-click="ctrl.onRemove(analyticUnit.id)"
-          class="pointer"
-        >
-          <i class="fa fa-trash"></i>
-        </a>
 
-        <a
-          ng-if="analyticUnit.selected"
-          ng-click="ctrl.onCancelLabeling(analyticUnit.id)"
-          class="pointer"
+        <label class="gf-form-label width-4"> Type </label>
+        <div class="gf-form-select-wrapper">
+          <select class="gf-form-input width-10"
+            ng-model="analyticUnit.type"
+            ng-options="type.value as type.name for type in ctrl.analyticUnitTypes[analyticUnit.detectorType]"
+            ng-disabled="true"
+          />
+        </div>
+
+        <!--
+        <label class="gf-form-label width-6"> Confidence </label>
+        <input
+          type="number" class="gf-form-input width-5 ng-valid ng-scope ng-empty ng-dirty ng-valid-number ng-touched"
+          placeholder="auto" bs-tooltip="'Override automatic decimal precision for legend and tooltips'"
+          data-placement="right" ng-model="ctrl.panel.decimals" ng-change="ctrl.render()" ng-model-onblur="" data-original-title="" title=""
+        />
+        -->
+
+        <label class="gf-form-label width-8"> Positive Color </label>
+        <span class="gf-form-label">
+          <color-picker
+            color="analyticUnit.labeledColor"
+            onChange="ctrl.onColorChange.bind(ctrl, analyticUnit.id, false)"
+          />
+        </span>
+
+        <!-- Hack to avoid Grafana's .gf-form-label + .gf-form-label css. Fix for https://github.com/hastic/hastic-grafana-app/issues/192 -->
+        <div ng-if="analyticUnit.detectorType === 'pattern'"></div>
+
+        <label ng-if="analyticUnit.detectorType === 'pattern'" class="gf-form-label width-8"> Negative Color </label>
+        <span ng-if="analyticUnit.detectorType === 'pattern'"  class="gf-form-label">
+          <color-picker
+            color="analyticUnit.deletedColor"
+            onChange="ctrl.onColorChange.bind(ctrl, analyticUnit.id, true)"
+          />
+        </span>
+
+        <label
+          class="gf-form-label"
+          ng-if="analyticUnit.detectorType === 'pattern'"
+          ng-style="analyticUnit.status === 'LEARNING' && { 'cursor': 'not-allowed' }"
         >
-          <i class="fa fa-ban"></i>
-        </a>
-      </label>
-
-      <label>
-        <i ng-if="analyticUnit.status === 'LEARNING'" class="grafana-tip fa fa-leanpub ng-scope" bs-tooltip="'Learning'"></i>
-        <i ng-if="analyticUnit.status === 'PENDING'" class="grafana-tip fa fa-list-ul ng-scope" bs-tooltip="'Pending'"></i>
-        <i ng-if="analyticUnit.status === 'FAILED'" class="grafana-tip fa fa-exclamation-circle ng-scope" bs-tooltip="'Error: ' + analyticUnit.error"></i>
-      </label>
+          <a class="pointer" tabindex="1"
+            ng-click="ctrl.onToggleLabelingMode(analyticUnit.id)"
+            ng-disabled="analyticUnit.status === 'LEARNING'"
+          >
+            <i class="fa fa-bar-chart" ng-if="!analyticUnit.saving"></i>
+            <i class="fa fa-spinner fa-spin" ng-if="analyticUnit.saving"></i>
+            <b ng-if="analyticUnit.saving" ng-disabled="true"> saving... </b>
+          </a>
+        </label>
 
-    </div>
-  </div>
-
-  <div class="editor-row" ng-if="ctrl.analyticsController.creatingNew">
-    <div class="gf-form">
-      <label class="gf-form-label width-4"> Name </label>
-      <input
-        type="text" class="gf-form-input max-width-15"
-        ng-model="ctrl.analyticsController.newAnalyticUnit.name"
-      >
-
-      <label class="gf-form-label width-8"> Detector Type </label>
-      <div class="gf-form-select-wrapper">
         <select class="gf-form-input width-10"
-          ng-model="ctrl.analyticsController.newAnalyticUnit.detectorType"
-          ng-options="analyticUnitDetectorType for analyticUnitDetectorType in ctrl.analyticUnitDetectorTypes"
-          ng-change="ctrl.analyticsController.onAnalyticUnitDetectorChange(ctrl.analyticUnitTypes);"
+          ng-model="ctrl.analyticsController.labelingMode"
+          ng-options="type.value as type.name for type in [
+            { name:'Label Positive', value: 'LABELING' }, 
+            { name:'Label Negative', value: 'DELETING' },
+            { name:'Unlabel', value: 'UNLABELING' }
+          ]"
+          ng-if="analyticUnit.selected && !analyticUnit.saving"
+          ng-disabled="analyticUnit.status === 'LEARNING'"
         />
-      </div>
 
-      <label class="gf-form-label width-8"> Type </label>
-      <div class="gf-form-select-wrapper">
-        <select class="gf-form-input width-10"
-          ng-model="ctrl.analyticsController.newAnalyticUnit.type"
-          ng-options="
-            type.value as type.name
-            for type in ctrl.analyticUnitTypes[ctrl.analyticsController.newAnalyticUnit.detectorType]
+        <select class="gf-form-input width-7"
+          ng-model="ctrl.analyticsController.getThreshold(analyticUnit.id).condition"
+          ng-options="type for type in ctrl.analyticsController.conditions"
+          ng-if="analyticUnit.detectorType === 'threshold'"
+        />
+        <input
+          class="gf-form-input width-5"
+          type="number"
+          ng-model="ctrl.analyticsController.getThreshold(analyticUnit.id).value"
+          ng-if="
+            analyticUnit.detectorType === 'threshold' &&
+            ctrl.analyticsController.getThreshold(analyticUnit.id).condition != 'NO_DATA'
           "
         />
+        <!-- TODO set .saving flag to thresholds, when learning is in progress -->
+        <button
+          class="btn btn-inverse"
+          ng-if="analyticUnit.detectorType === 'threshold'"
+          ng-click="ctrl.analyticsController.sendThresholdParamsToServer(analyticUnit.id)"
+          ng-disabled="analyticUnit.status === 'PENDING' || analyticUnit.status === 'LEARNING'"
+          >
+          Apply
+        </button>
+
+        <label class="gf-form-label" ng-hide="analyticUnit.selected">
+          <a
+            ng-if="analyticUnit.visible"
+            bs-tooltip="'Hide. It`s visible now.'"
+            ng-click="ctrl.onToggleVisibility(analyticUnit.id)"
+            class="pointer"
+          >
+            <i class="fa fa-eye"></i>
+          </a>
+
+          <a
+            ng-if="!analyticUnit.visible"
+            bs-tooltip="'Show. It`s hidden now.'"
+            ng-click="ctrl.onToggleVisibility(analyticUnit.id)"
+            class="pointer"
+          >
+            <i class="fa fa-eye-slash"></i>
+          </a>
+        </label>
+
+        <label class="gf-form-label">
+          <a
+            ng-if="!analyticUnit.selected"
+            ng-click="ctrl.onRemove(analyticUnit.id)"
+            class="pointer"
+          >
+            <i class="fa fa-trash"></i>
+          </a>
+
+          <a
+            ng-if="analyticUnit.selected"
+            ng-click="ctrl.onCancelLabeling(analyticUnit.id)"
+            class="pointer"
+          >
+            <i class="fa fa-ban"></i>
+          </a>
+        </label>
+
+        <label>
+          <i ng-if="analyticUnit.status === 'LEARNING'" class="grafana-tip fa fa-leanpub ng-scope" bs-tooltip="'Learning'"></i>
+          <i ng-if="analyticUnit.status === 'PENDING'" class="grafana-tip fa fa-list-ul ng-scope" bs-tooltip="'Pending'"></i>
+          <i ng-if="analyticUnit.status === 'FAILED'" class="grafana-tip fa fa-exclamation-circle ng-scope" bs-tooltip="'Error: ' + analyticUnit.error"></i>
+        </label>
+
       </div>
+    </div>
+
+    <div class="editor-row" ng-if="ctrl.analyticsController.creatingNew">
+      <div class="gf-form">
+        <label class="gf-form-label width-4"> Name </label>
+        <input
+          type="text" class="gf-form-input max-width-15"
+          ng-model="ctrl.analyticsController.newAnalyticUnit.name"
+        >
 
-      <label class="gf-form-label">
-        <a class="pointer" tabindex="1" ng-click="ctrl.saveNew()">
-          <b ng-if="!ctrl.analyticsController.saving"> create </b>
-          <b ng-if="ctrl.analyticsController.saving" ng-disabled="true"> saving... </b>
-        </a>
-      </label>
+        <label class="gf-form-label width-8"> Detector Type </label>
+        <div class="gf-form-select-wrapper">
+          <select class="gf-form-input width-10"
+            ng-model="ctrl.analyticsController.newAnalyticUnit.detectorType"
+            ng-options="analyticUnitDetectorType for analyticUnitDetectorType in ctrl.analyticUnitDetectorTypes"
+            ng-change="ctrl.analyticsController.onAnalyticUnitDetectorChange(ctrl.analyticUnitTypes);"
+          />
+        </div>
+
+        <label class="gf-form-label width-8"> Type </label>
+        <div class="gf-form-select-wrapper">
+          <select class="gf-form-input width-10"
+            ng-model="ctrl.analyticsController.newAnalyticUnit.type"
+            ng-options="
+              type.value as type.name
+              for type in ctrl.analyticUnitTypes[ctrl.analyticsController.newAnalyticUnit.detectorType]
+            "
+          />
+        </div>
+
+        <label class="gf-form-label">
+          <a class="pointer" tabindex="1" ng-click="ctrl.saveNew()">
+            <b ng-if="!ctrl.analyticsController.saving"> create </b>
+            <b ng-if="ctrl.analyticsController.saving" ng-disabled="true"> saving... </b>
+          </a>
+        </label>
+      </div>
     </div>
-  </div>
 
-  <div class="gf-form-button-row" ng-if="!ctrl.analyticsController.creatingAnalyticUnit">
-    <button class="btn btn-inverse" ng-click="ctrl.createNew()">
-      <i class="fa fa-plus"></i>
-      Add Analytic Unit
-    </button>
-  </div>
-  <div class="gf-form-button-row">
-    <button class="gf-form-label width-10 pointer" ng-click="ctrl.showHelp = !ctrl.showHelp">
-      Show Help
-      <i class="fa fa-caret-down" ng-show="ctrl.showHelp"></i>
-      <i class="fa fa-caret-right" ng-hide="ctrl.showHelp"></i>
-    </button>
+    <div class="gf-form-button-row" ng-if="!ctrl.analyticsController.creatingAnalyticUnit">
+      <button class="btn btn-inverse" ng-click="ctrl.createNew()">
+        <i class="fa fa-plus"></i>
+        Add Analytic Unit
+      </button>
+    </div>
+    <div class="gf-form-button-row">
+      <button class="gf-form-label width-10 pointer" ng-click="ctrl.showHelp = !ctrl.showHelp">
+        Show Help
+        <i class="fa fa-caret-down" ng-show="ctrl.showHelp"></i>
+        <i class="fa fa-caret-right" ng-hide="ctrl.showHelp"></i>
+      </button>
+    </div>
   </div>
+</div>
 
 <div class="gf-form" ng-show="ctrl.showHelp" ng-bind-html="ctrl.analyticsController.helpSectionText"></div>
 

src/panel/graph_panel/services/analytic_service.ts

@@ -14,9 +14,7 @@ export class AnalyticService {
   constructor(
     private _backendURL: string,
     private $http
-  ) {
-    this.isBackendOk();
-  }
+  ) { }
 
   async getAnalyticUnitTypes() {
     return await this.get('/analyticUnits/types');
@@ -24,6 +22,9 @@ export class AnalyticService {
 
   async getThresholds(ids: AnalyticUnitId[]) {
     const resp = await this.get('/threshold', { ids: ids.join(',') });
+    if(resp === undefined) {
+      return [];
+    }
     return resp.thresholds.filter(t => t !== null);
   }
 
@@ -61,6 +62,10 @@ export class AnalyticService {
   }
 
   async isBackendOk(): Promise<boolean> {
+    if(!this._checkBackendUrl()) {
+      this._isUp = false;
+      return false;
+    }
     await this.get('/');
     return this._isUp;
   }
@@ -135,7 +140,19 @@ export class AnalyticService {
   }
 
   async getServerInfo(): Promise<ServerInfo> {
-    let data = await this.get('/');
+    const data = await this.get('/');
+    if(data === undefined) {
+      return {
+        nodeVersion: 'unknown',
+        packageVersion: 'unknown',
+        npmUserAgent: 'unknown',
+        docker: 'unknown',
+        zmqConectionString: 'unknown',
+        serverPort: 'unknown',
+        gitBranch: 'unknown',
+        gitCommitHash: 'unknown'
+      };
+    }
     return {
       nodeVersion: data.nodeVersion,
       packageVersion: data.packageVersion,
@@ -184,8 +201,23 @@ export class AnalyticService {
       } else {
         this._isUp = true;
       }
-      throw error;
+      // throw error;
+    }
+  }
+
+  
+  private _checkBackendUrl(): boolean {
+    if(this._backendURL === null || this._backendURL === undefined || this._backendURL === '') {
+      appEvents.emit(
+        'alert-warning',
+        [
+          `Datasource (or URL in datasource) is missing`,
+          `Please set it in datasource config. More info: https://github.com/hastic/hastic-grafana-app/wiki/Getting-started`
+        ]
+      );
+      return false;
     }
+    return true;
   }
 
   private async get(url, params?) {

src/plugin.json

@@ -14,7 +14,8 @@
     "version": "0.3.0"
   },
   "includes": [
-    { "type": "panel", "name": "Hastic Graph Panel" }
+    { "type": "panel", "name": "Hastic Graph Panel" },
+    { "type": "datasource", "name": "Hastic Datasource" }
   ],
   "dependencies": {
     "grafanaVersion": "5.4.x"

src/utlis.ts

@@ -1,14 +1,15 @@
 import url from 'url-parse';
 
-export function normalizeUrl(grafanaUrl: string) {
-  if(!grafanaUrl) {
-    return grafanaUrl;
+
+export function normalizeUrl(inputUrl: string) {
+  if(!inputUrl) {
+    return inputUrl;
   }
-  let urlObj = new url(grafanaUrl, {});
+  let urlObj = new url(inputUrl, {});
   if(urlObj.protocol !== 'http:' && urlObj.protocol !== 'https:') {
-    grafanaUrl = `http://${grafanaUrl}`;
-    urlObj = new url(grafanaUrl, {});
-    console.log('No protocol provided in GRAFANA_URL -> inserting "http://"');
+    inputUrl = `http://${inputUrl}`;
+    urlObj = new url(inputUrl, {});
+    console.log('No protocol provided in inputUrl -> inserting "http://"');
   }
   if(urlObj.slashes === false) {
     urlObj = new url(`${urlObj.protocol}//${urlObj.pathname}`, {});
@@ -16,7 +17,7 @@ export function normalizeUrl(grafanaUrl: string) {
   } 
   if(urlObj.pathname.slice(-1) === '/') {
     urlObj.pathname = urlObj.pathname.slice(0, -1);
-    console.log('Removing the slash at the end of GRAFANA_URL');
+    console.log('Removing the slash at the end of inputUrl');
   }
   let finalUrl = `${urlObj.protocol}//${urlObj.hostname}`;
   if(urlObj.port !== '') {