ArcGIS Runtime SDK for Java

Service Feature Table No Cache

Demonstrates how to use a feature service in an on-interaction-no-cache mode.

On-interaction-no-cache mode will always fetch Features from the server and doesn't cache any Features on the client's side. This meaning that Features will be fetched whenever the ArcGISMap pans, zooms, selects, or queries

How it works

How to set FeatureRequestMode.ON_INTERACTION_NO_CAHCE mode:

  1. Create a ServiceFeatureTable from a URL.
  2. Set request mode of table, ServiceFeatureTable.setFeatureRequestMode(FeatureRequestMode.ON_INTERACTION_NO_CAHCE).
.

Code

/*
 * Copyright 2017 Esri.
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */

package com.esri.samples.featurelayers.service_feature_table_no_cache;

import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.layout.StackPane;
import javafx.stage.Stage;

import com.esri.arcgisruntime.data.ServiceFeatureTable;
import com.esri.arcgisruntime.geometry.Envelope;
import com.esri.arcgisruntime.geometry.Point;
import com.esri.arcgisruntime.geometry.SpatialReference;
import com.esri.arcgisruntime.geometry.SpatialReferences;
import com.esri.arcgisruntime.layers.FeatureLayer;
import com.esri.arcgisruntime.mapping.ArcGISMap;
import com.esri.arcgisruntime.mapping.Basemap;
import com.esri.arcgisruntime.mapping.Viewpoint;
import com.esri.arcgisruntime.mapping.view.MapView;

public class ServiceFeatureTableNoCacheSample extends Application {

  private MapView mapView;

  @Override
  public void start(Stage stage) {

    try {
      // create stack pane and application scene
      StackPane stackPane = new StackPane();
      Scene scene = new Scene(stackPane);

      // set title, size, and add scene to stage
      stage.setTitle("Service Feature Table No Cache Sample");
      stage.setWidth(800);
      stage.setHeight(700);
      stage.setScene(scene);
      stage.show();

      ArcGISMap map = new ArcGISMap(Basemap.createTopographic());

      // create starting viewpoint for ArcGISMap
      SpatialReference spatialReference = SpatialReferences.getWebMercator();
      Point leftPoint = new Point(-1.30758164047166E7, 4014771.46954516, spatialReference);
      Point rightPoint = new Point(-1.30730056797177E7, 4016869.78617381, spatialReference);
      Envelope envelope = new Envelope(leftPoint, rightPoint);
      Viewpoint viewpoint = new Viewpoint(envelope);

      // set starting viewpoint for ArcGISMap
      map.setInitialViewpoint(viewpoint);

      // create service feature table from URL
      final String serviceFeatureUrl = "http://sampleserver6.arcgisonline.com/arcgis/rest/services/PoolPermits/FeatureServer/0";
      ServiceFeatureTable featureTable = new ServiceFeatureTable(serviceFeatureUrl);

      // set cache mode for table to no caching
      featureTable.setFeatureRequestMode(ServiceFeatureTable.FeatureRequestMode.ON_INTERACTION_NO_CACHE);
      FeatureLayer featureLayer = new FeatureLayer(featureTable);

      // add feature layer to ArcGISMap
      map.getOperationalLayers().add(featureLayer);

      // create a view for this ArcGISMap and set ArcGISMap to it
      mapView = new MapView();
      mapView.setMap(map);

      // add the map view to stack pane
      stackPane.getChildren().addAll(mapView);

    } catch (Exception e) {
      // on any error, display the stack trace
      e.printStackTrace();
    }
  }

  /**
   * Stops and releases all resources used in application.
   */
  @Override
  public void stop() {

    if (mapView != null) {
      mapView.dispose();
    }
  }

  /**
   * Opens and runs application.
   *
   * @param args arguments passed to this application
   */
  public static void main(String[] args) {

    Application.launch(args);
  }
}


In this topic
  1. How it works
  2. Code