I dont understand what is wrong

Question about the task

Restaurant (part 14)

Java Multithreading, Level 9, Lesson 15

Under discussion

if anyone could help me with these two conditions, I would really appreciate it. Thank you.

1. Create a void put(EventDataRow data) method in StatisticsStorage.

2. To allow the put(EventDataRow data) method to add the data object to the map, we need the event type (EventType).
It would make sense for the event to store its type. Therefore,
2.1. Add an EventType getType() method to the EventDataRow interface
2.2. Implement this method in each event class: OrderReadyEventDataRow, NoVideosAvailableEventDataRow, VideosSelectedEventDataRow

3. Make it so that the void put(EventDataRow data) method cannot be accessed outside the StatisticsManager class.
Take advantage of the features of nested classes.

Now it remains to arrange StatisticsManager calls in places that generate events.

4. Record an event for the cook when the food is prepared.
Add a getter for the dishes field to the Order class, and use it when creating the event.

5. Record a "videos selected" event before displaying ads to the customer.

6. The record method with one EventDataRow parameter should record the event in statisticsStorage.

Requirements:

The EventDataRow interface should declare an EventType getType() method.
Classes that support the EventDataRow interface must correctly implement the getType() method.
When the food is prepared, the cook must generate an appropriate event.
Before a video is displayed, a "videos selected" event must be recorded.
The StatisticsStorage class's put method must be implemented in accordance with the task conditions.
The StatisticsManager class's record method with one EventDataRow parameter should record the passed event in statisticsStorage.

package com.codegym.task.task27.task2712; import com.codegym.task.task27.task2712.kitchen.Cook; import com.codegym.task.task27.task2712.kitchen.Order; import com.codegym.task.task27.task2712.kitchen.Waiter; public class Restaurant { public static void main(String[] args) { Tablet tablet=new Tablet(1); Cook cook =new Cook("Justin"); Order order= tablet.createOrder(); if(!order.isEmpty()){ tablet.addObserver(cook); cook.update(tablet,order); Waiter waiter=new Waiter(); cook.addObserver(waiter); waiter.update(cook,order); } } }

Comments (3)

Popular
New
Old

You must be signed in to leave a comment

Armand Karabou

Level 41 , Dakar, France

11 October 2020, 14:09

long amount=0; int duration=0; for(Advertisement a:playList)amount+=a.getAmountPerImpression(); for(Advertisement a:playList)duration+=a.getDuration(); StatisticsManager.getInstance().record(new VideosSelectedEventDataRow(playList,amount,duration)); for (Advertisement ad : playList) { ConsoleHelper.writeMessage(ad.getName() + " is displaying... " + ad.getAmountPerImpression() + ", " + 1000 * ad.getAmountPerImpression() / ad.getDuration()); ad.revalidate(); }

Armand Karabou

Level 41 , Dakar, France

11 October 2020, 14:05

Have you resolved it? i still cannot record "videos selected" event

Guadalupe Gagnon

Level 37 , Tampa, United States

29 September 2020, 15:28

#1 remove line 95 of the StatisticsManager class #2 fix the main method in Restaurant. it should look like this:

public static void main(String[] args) {
   Tablet tablet = new Tablet(1);
   Cook cook = new Cook("Justin");
   Waiter waiter = new Waiter();
   tablet.addObserver(cook);
   cook.addObserver(waiter);
   tablet.createOrder();
}

#3 generate the appropriate event in the Cook class. Looking at OrderReadyEventDataRow class, the args for the constructor are: (String tabletName, String cookName, int cookingTimeSeconds, List<Dish> dishesInOrder) The first arg in the Cook class at line 28 is tablet name, in this code it looks like you are passing in the tablet number from the order. Going to the tablet class there is a toString() method with a more detailed "name". Aslo, while you can access the Tablet from the Order class, the Observable o in the Cooks update args is going to be the tablet. I would use that instead (((Tablet) o).toString()) The cookName looks good. The cookingTimeSeconds looks good The dishesInOrder looks good #4 try moving the recording of the VideosSelectedEventDataRow (line 40 of the AdvertisementManager class) to after the advertisements have been revalidated (so after line 41)