eml.studio.client.ui.menu.DatasetDownloadMenu.java Source code

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Here is the source code for eml.studio.client.ui.menu.DatasetDownloadMenu.java

Source

/**
 * Copyright 2017 Institute of Computing Technology, Chinese Academy of Sciences.
 * Licensed under the terms of the Apache 2.0 license.
 * Please see LICENSE file in the project root for terms
 */
package eml.studio.client.ui.menu;

import java.util.logging.Logger;

import eml.studio.client.rpc.DatasetService;
import eml.studio.client.rpc.DatasetServiceAsync;
import eml.studio.client.ui.tree.DatasetLeaf;
import com.google.gwt.core.client.GWT;
import com.google.gwt.user.client.Command;
import com.google.gwt.user.client.Window;
import com.google.gwt.user.client.rpc.AsyncCallback;
import com.google.gwt.user.client.ui.MenuItem;

/**
 * Create a menu for program downloading
 */
public class DatasetDownloadMenu {
    private static final double MAX_DOWNLOAD_SIZE = 1000000; //Maximum file size (in kb)
    protected static Logger logger = Logger.getLogger(DatasetDownloadMenu.class.getName());

    public static MenuItem create(final DatasetLeaf node) {
        Command command = new MenuItemCommand(node) {

            @Override
            public void execute() {
                String id = node.getModule().getId();
                final DatasetServiceAsync svc = GWT.create(DatasetService.class);
                svc.download(id, new AsyncCallback<String>() {

                    @Override
                    public void onFailure(Throwable caught) {
                        Window.alert(caught.getMessage());
                    }

                    @Override
                    public void onSuccess(final String result) {
                        Window.alert("Start calculating the file size");
                        svc.getFileSize(result, new AsyncCallback<Double>() {

                            @Override
                            public void onFailure(Throwable caught) {
                                // TODO Auto-generated method stub
                                logger.info("Failed to get download file size!");
                            }

                            @Override
                            public void onSuccess(Double size) {
                                // TODO Auto-generated method stub
                                if (size < MAX_DOWNLOAD_SIZE) {
                                    Window.alert("Start downloading the file");
                                    String url = GWT.getModuleBaseURL().split("EML")[0]
                                            + "EMLStudioMonitor/filedownload?filename=" + result;
                                    Window.open(url, "_blank", "status=0,toolbar=0,menubar=0,location=0");
                                } else
                                    Window.alert(
                                            "The download file exceeds the limit size (1g) and can not download the file?");
                            }

                        });

                    }

                });
                this.component.getContextMenu().hide();
            }
        };

        MenuItem item = new MenuItem("Download", command);
        return item;
    }
}