org.hbrs.nosql.mongoweb.gui.views.UseCase6.java Source code

Introduction

Here is the source code for org.hbrs.nosql.mongoweb.gui.views.UseCase6.java

Source

/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package org.hbrs.nosql.mongoweb.gui.views;

import com.mongodb.AggregationOutput;
import com.mongodb.DBObject;
import com.vaadin.ui.Button;
import com.vaadin.ui.Label;
import com.vaadin.ui.VerticalLayout;

import java.time.Duration;
import java.time.LocalTime;
import java.util.List;

import org.hbrs.nosql.mongoweb.db.MongoDBConnector;
import org.hbrs.nosql.mongoweb.model.UseCase;

/**
 * @author Franz
 */
public class UseCase6 extends AbstractUseCase {
    @Override
    protected void setUp() {
        //Add your Vaadin Coding here ;)
        //MongoDB Connector
        MongoDBConnector mongo = new MongoDBConnector();

        VerticalLayout uc6 = new VerticalLayout();

        Button button = new Button("Welcher Professor hat die meisten Arbeiten untersttzt?");

        button.addClickListener(e -> {
            uc6.removeAllComponents();

            LocalTime t1 = LocalTime.now();

            // load list with values
            AggregationOutput uc6answer = mongo.getQuery6();

            LocalTime t2 = LocalTime.now();
            Duration elapsed = Duration.between(t1, t2);

            // query over list
            for (DBObject place : uc6answer.results()) {
                if (!place.get("_id").equals("")) {
                    uc6.addComponent(new Label(place.get("_id") + ": " + place.get("Anzahl")));
                }
            }

            uc6.addComponent(new Label("Time: " + elapsed));

            addComponent(uc6);
        });

        addComponents(button);
        setMargin(true);
        setSpacing(true);
    }

    @Override
    protected UseCase getUseCase() {
        return (UseCase.UC6);
    }
}