io.pivotal.pde.demo.tracker.gemfire.TrackerUI.java Source code

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Here is the source code for io.pivotal.pde.demo.tracker.gemfire.TrackerUI.java

Source

package io.pivotal.pde.demo.tracker.gemfire;

import java.util.List;

import org.springframework.context.ApplicationContext;
import org.springframework.util.StringUtils;

import com.vaadin.annotations.Push;
import com.vaadin.annotations.Theme;
import com.vaadin.data.sort.SortOrder;
import com.vaadin.data.util.BeanItemContainer;
import com.vaadin.server.FontAwesome;
import com.vaadin.server.VaadinRequest;
import com.vaadin.server.VaadinServlet;
import com.vaadin.shared.data.sort.SortDirection;
import com.vaadin.ui.Button;
import com.vaadin.ui.Grid;
import com.vaadin.ui.HorizontalLayout;
import com.vaadin.ui.TextField;
import com.vaadin.ui.UI;
import com.vaadin.ui.VerticalLayout;

@Theme("valo")
@Push
public class TrackerUI extends UI implements CheckInCacheListener.ChangeHandler {

    private CheckInRepository repo;

    private CheckInEditor editor;

    private Grid grid;

    private TextField filter;

    private Button addNewBtn;

    public TrackerUI() {
    }

    @Override
    protected void init(VaadinRequest request) {
        this.grid = new Grid();
        this.filter = new TextField();
        this.addNewBtn = new Button("Check In", FontAwesome.PLUS);

        ApplicationContext ctx = (ApplicationContext) VaadinServlet.getCurrent().getServletContext()
                .getAttribute("spring-context");
        this.repo = ctx.getBean(CheckInRepository.class);
        this.editor = ctx.getBean(CheckInEditor.class);

        // build layout
        HorizontalLayout actions = new HorizontalLayout(filter, addNewBtn);
        VerticalLayout mainLayout = new VerticalLayout(actions, grid, editor);
        setContent(mainLayout);

        // Configure layouts and components
        actions.setSpacing(true);
        mainLayout.setMargin(true);
        mainLayout.setSpacing(true);

        grid.setHeight(300, Unit.PIXELS);
        grid.setWidth(550, Unit.PIXELS);
        grid.setColumns("plate", "city", "timestamp");
        grid.setContainerDataSource(new BeanItemContainer<CheckIn>(CheckIn.class));

        filter.setInputPrompt("Filter by License Plate");

        // Hook logic to components

        // Replace listing with filtered content when user changes filter
        filter.addTextChangeListener(e -> refillGrid(e.getText()));

        // Show the form when new button is clicked
        addNewBtn.addClickListener(e -> editor.newCheckIn());

        // Listen changes made by the editor, refresh data from backend
        editor.setChangeHandler(new CheckInEditor.ChangeHandler() {

            @Override
            public void onChange() {
                editor.setVisible(false);
                refillGrid(filter.getValue());
            }

        });

        CheckInCacheListener changeListener = ctx.getBean(CheckInCacheListener.class);
        changeListener.setHandler(this);

        // this.setPollInterval(5000);

        // Initialize listing
        refillGrid(null);
    }

    // public void itemAdded(CheckIn newItem) {
    // access(() -> {
    // BeanItemContainer<CheckIn> bic = (BeanItemContainer<CheckIn>)
    // grid.getContainerDataSource();
    // String filterVal = filter.getValue();
    //
    // if (StringUtils.isEmpty(filterVal)) {
    // if (!newItem.getPlate().toLowerCase().startsWith(filterVal)) {
    // return;
    // }
    // }
    //
    // bic.addBean(newItem);
    //
    // });
    // }

    public void itemAdded(CheckIn newItem) {
        access(() -> {
            refillGrid(filter.getValue());
        });
    }

    private void refillGrid(String text) {
        BeanItemContainer<CheckIn> bic = (BeanItemContainer<CheckIn>) grid.getContainerDataSource();
        bic.removeAllItems();

        if (StringUtils.isEmpty(text)) {
            for (CheckIn c : repo.findAll()) {
                bic.addBean(c);
            }
        } else {
            for (CheckIn c : repo.findByPlateStartsWithIgnoreCase(text)) {
                bic.addBean(c);
            }
        }

        grid.sort("timestamp", SortDirection.DESCENDING);
    }

}