Generate geodatabase replica from feature service

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/*
 * 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.generate_geodatabase_replica_from_feature_service;

import java.io.File;
import java.io.IOException;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.atomic.AtomicInteger;

import javafx.application.Application;
import javafx.application.Platform;
import javafx.beans.binding.Bindings;
import javafx.geometry.Insets;
import javafx.geometry.Pos;
import javafx.scene.Scene;
import javafx.scene.control.Alert;
import javafx.scene.control.Button;
import javafx.scene.control.ProgressBar;
import javafx.scene.layout.StackPane;
import javafx.stage.Stage;

import com.esri.arcgisruntime.concurrent.Job;
import com.esri.arcgisruntime.concurrent.ListenableFuture;
import com.esri.arcgisruntime.data.Geodatabase;
import com.esri.arcgisruntime.data.TileCache;
import com.esri.arcgisruntime.geometry.Envelope;
import com.esri.arcgisruntime.layers.ArcGISTiledLayer;
import com.esri.arcgisruntime.layers.FeatureLayer;
import com.esri.arcgisruntime.loadable.LoadStatus;
import com.esri.arcgisruntime.mapping.ArcGISMap;
import com.esri.arcgisruntime.mapping.Basemap;
import com.esri.arcgisruntime.mapping.view.Graphic;
import com.esri.arcgisruntime.mapping.view.GraphicsOverlay;
import com.esri.arcgisruntime.mapping.view.MapView;
import com.esri.arcgisruntime.symbology.SimpleLineSymbol;
import com.esri.arcgisruntime.tasks.geodatabase.GenerateGeodatabaseJob;
import com.esri.arcgisruntime.tasks.geodatabase.GenerateGeodatabaseParameters;
import com.esri.arcgisruntime.tasks.geodatabase.GeodatabaseSyncTask;

public class GenerateGeodatabaseReplicaFromFeatureServiceSample extends Application {

  private MapView mapView;
  // keep loadables in scope to avoid garbage collection
  private GeodatabaseSyncTask syncTask;
  private Geodatabase geodatabase;

  private final AtomicInteger replica = new AtomicInteger();

  @Override
  public void start(Stage stage) {

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

      // size the stage, add a title, and set scene to stage
      stage.setTitle("Generate Geodatabase Replica from Feature Service Sample");
      stage.setWidth(800);
      stage.setHeight(700);
      stage.setScene(scene);
      stage.show();

      // use a local tile package for the basemap
      File tpkFile = new File(System.getProperty("data.dir"), "./samples-data/sanfrancisco/SanFrancisco.tpk");
      TileCache tileCache = new TileCache(tpkFile.getAbsolutePath());
      ArcGISTiledLayer tiledLayer = new ArcGISTiledLayer(tileCache);

      // create a map view and add a map
      mapView = new MapView();
      ArcGISMap map = new ArcGISMap(new Basemap(tiledLayer));
      mapView.setMap(map);

      // create a graphics overlay and symbol to mark the extent
      GraphicsOverlay graphicsOverlay = new GraphicsOverlay();
      mapView.getGraphicsOverlays().add(graphicsOverlay);
      SimpleLineSymbol boundarySymbol = new SimpleLineSymbol(SimpleLineSymbol.Style.SOLID, 0xFFFF0000, 5);

      // add a button to generate the geodatabase and a progress bar
      Button generateButton = new Button("Generate Geodatabase");
      generateButton.setDisable(true); //wait until sync task loaded
      ProgressBar progressBar = new ProgressBar();
      progressBar.visibleProperty().bind(Bindings.createBooleanBinding(() -> progressBar.getProgress() > 0,
          progressBar.progressProperty()));
      progressBar.setProgress(0.0);

      // create a geodatabase sync task
      String featureServiceURL =
          "https://sampleserver6.arcgisonline.com/arcgis/rest/services/Sync/WildfireSync/FeatureServer";
      syncTask = new GeodatabaseSyncTask(featureServiceURL);
      syncTask.loadAsync();
      syncTask.addDoneLoadingListener(() -> generateButton.setDisable(false));

      // generate the geodatabase on button click
      generateButton.setOnMouseClicked(event -> {
        // clear any previous operational layers and graphics if button clicked more than once
        map.getOperationalLayers().clear();
        graphicsOverlay.getGraphics().clear();

        // show the extent used as a graphic
        Envelope extent = mapView.getVisibleArea().getExtent();
        Graphic boundary = new Graphic(extent, boundarySymbol);
        graphicsOverlay.getGraphics().add(boundary);

        // create generate geodatabase parameters for the current extent
        ListenableFuture<GenerateGeodatabaseParameters> defaultParameters = syncTask
            .createDefaultGenerateGeodatabaseParametersAsync(extent);
        defaultParameters.addDoneListener(() -> {
          try {
            // set parameters
            GenerateGeodatabaseParameters parameters = defaultParameters.get();
            parameters.setReturnAttachments(false);

            // temporary file for geodatabase
            File tempFile = File.createTempFile("gdb" + replica.getAndIncrement(), ".geodatabase");
            tempFile.deleteOnExit();

            // create and start the job
            GenerateGeodatabaseJob job = syncTask.generateGeodatabase(parameters, tempFile.getAbsolutePath());
            job.start();

            // show progress
            job.addProgressChangedListener(() -> {
              int progress = job.getProgress();
              progressBar.setProgress((double) progress / 100.0);
            });

            // get geodatabase when done
            job.addJobDoneListener(() -> {
              if (job.getStatus() == Job.Status.SUCCEEDED) {
                geodatabase = job.getResult();
                displayMessage("Geodatabase successfully generated", "Unregistering geodatabase since we're not " +
                    "syncing it here");
                geodatabase.loadAsync();
                geodatabase.addDoneLoadingListener(() -> {
                  if (geodatabase.getLoadStatus() == LoadStatus.LOADED) {
                    geodatabase.getGeodatabaseFeatureTables().forEach(ft -> {
                      ft.loadAsync();
                      map.getOperationalLayers().add(new FeatureLayer(ft));
                    });
                  } else {
                    displayMessage("Error loading geodatabase", geodatabase.getLoadError().getMessage());
                  }
                });
                // unregister since we're not syncing
                syncTask.unregisterGeodatabaseAsync(geodatabase);
              } else if (job.getError() != null) {
                displayMessage("Error generating geodatabase", job.getError().getMessage());
              } else {
                displayMessage("Unknown Error generating geodatabase", null);
              }
            });
          } catch (InterruptedException | ExecutionException e) {
            displayMessage("Error generating geodatabase parameters", e.getMessage());
          } catch (IOException e) {
            displayMessage("Could not create file for geodatabase", e.getMessage());
          }
        });
      });

      // add the map view and controls to stack pane
      stackPane.getChildren().addAll(mapView, generateButton, progressBar);
      StackPane.setAlignment(generateButton, Pos.TOP_LEFT);
      StackPane.setMargin(generateButton, new Insets(10, 0, 0, 10));
      StackPane.setAlignment(progressBar, Pos.TOP_RIGHT);
      StackPane.setMargin(progressBar, new Insets(10, 10, 0, 0));

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

  /**
   * Shows a message in an alert dialog.
   *
   * @param title title of alert
   * @param message message to display
   */
  private void displayMessage(String title, String message) {

    Platform.runLater(() -> {
      Alert dialog = new Alert(Alert.AlertType.INFORMATION);
      dialog.setHeaderText(title);
      dialog.setContentText(message);
      dialog.showAndWait();
    });
  }

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

    // release resources when the application closes
    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);
  }
}