This is a part of an online Codename One course published around 2017 see it all for free at https://debugagent.com/series/cn1

1. Finishing the App - Part I

2. The Server
✦The server code is attached to this course but I’m not
discussing it
✦I want to avoid that complexity in this course and I’m
keeping it for the app builder course
© Codename One 2017 all rights reserved

3. Finishing the App
✦ Finishing an app is the hardest thing for most
developers
✦ We procrastinate and find other things that need
doing and can’t make it “past the finish line”
✦ The trick is to decide on a very restricted list of
features and work thru them until the beta
✦ Don’t add to that list!
It needs to be complete
© Codename One 2017 all rights reserved

4. List of things to fix
✦Bind data to the server
✦Add support for delivery address collection
✦Add some validation such as minimum order
✦Fix styling of components for pressed states
✦Implement search in the client
✦Implement selection based on dish category
✦Store dish image data in the server/database and fetch/
cache dynamically
© Codename One 2017 all rights reserved

5. public class DishService {
public static boolean hasCachedDishList() {
return Storage.getInstance().exists("DishListCache");
}
public static void loadDishesFromCache() {
JSONParser p = new JSONParser();
try {
Map<String, Object> m = p.parseJSON(new InputStreamReader(
Storage.getInstance().createInputStream("DishListCache"), "UTF-8"));
List<Object> l = (List<Object>)m.get("dishes");
Restaurant.getInstance().menu.get().dishes.clear();
for(Object o : l) {
Dish d = new Dish();
d.getPropertyIndex().populateFromMap((Map)o);
Restaurant.getInstance().menu.get().dishes.add(d);
}
List<String> cats = (List<String>)m.get("categories");
Restaurant.getInstance().menu.get().categories.clear();
for(String str : cats) {
Restaurant.getInstance().menu.get().categories.add(str);
}
if(!Restaurant.getInstance().menu.get().dishDownloadFinished.get()) {
Restaurant.getInstance().menu.get().dishDownloadFinished.set(Boolean.TRUE);
}
} catch(IOException err) {
Log.e(err);
ToastBar.showErrorMessage("Error loading list of dishes: " + err);
Log.sendLog();
DishService (Client)

6. public class DishService {
public static boolean hasCachedDishList() {
return Storage.getInstance().exists("DishListCache");
}
public static void loadDishesFromCache() {
JSONParser p = new JSONParser();
try {
Map<String, Object> m = p.parseJSON(new InputStreamReader(
Storage.getInstance().createInputStream("DishListCache"), "UTF-8"));
List<Object> l = (List<Object>)m.get("dishes");
Restaurant.getInstance().menu.get().dishes.clear();
for(Object o : l) {
Dish d = new Dish();
d.getPropertyIndex().populateFromMap((Map)o);
Restaurant.getInstance().menu.get().dishes.add(d);
}
List<String> cats = (List<String>)m.get("categories");
Restaurant.getInstance().menu.get().categories.clear();
for(String str : cats) {
Restaurant.getInstance().menu.get().categories.add(str);
}
if(!Restaurant.getInstance().menu.get().dishDownloadFinished.get()) {
Restaurant.getInstance().menu.get().dishDownloadFinished.set(Boolean.TRUE);
}
} catch(IOException err) {
Log.e(err);
ToastBar.showErrorMessage("Error loading list of dishes: " + err);
Log.sendLog();
DishService (Client)

7. public class DishService {
public static boolean hasCachedDishList() {
return Storage.getInstance().exists("DishListCache");
}
public static void loadDishesFromCache() {
JSONParser p = new JSONParser();
try {
Map<String, Object> m = p.parseJSON(new InputStreamReader(
Storage.getInstance().createInputStream("DishListCache"), "UTF-8"));
List<Object> l = (List<Object>)m.get("dishes");
Restaurant.getInstance().menu.get().dishes.clear();
for(Object o : l) {
Dish d = new Dish();
d.getPropertyIndex().populateFromMap((Map)o);
Restaurant.getInstance().menu.get().dishes.add(d);
}
List<String> cats = (List<String>)m.get("categories");
Restaurant.getInstance().menu.get().categories.clear();
for(String str : cats) {
Restaurant.getInstance().menu.get().categories.add(str);
}
if(!Restaurant.getInstance().menu.get().dishDownloadFinished.get()) {
Restaurant.getInstance().menu.get().dishDownloadFinished.set(Boolean.TRUE);
}
} catch(IOException err) {
Log.e(err);
ToastBar.showErrorMessage("Error loading list of dishes: " + err);
Log.sendLog();
DishService (Client)

8. public class DishService {
public static boolean hasCachedDishList() {
return Storage.getInstance().exists("DishListCache");
}
public static void loadDishesFromCache() {
JSONParser p = new JSONParser();
try {
Map<String, Object> m = p.parseJSON(new InputStreamReader(
Storage.getInstance().createInputStream("DishListCache"), "UTF-8"));
List<Object> l = (List<Object>)m.get("dishes");
Restaurant.getInstance().menu.get().dishes.clear();
for(Object o : l) {
Dish d = new Dish();
d.getPropertyIndex().populateFromMap((Map)o);
Restaurant.getInstance().menu.get().dishes.add(d);
}
List<String> cats = (List<String>)m.get("categories");
Restaurant.getInstance().menu.get().categories.clear();
for(String str : cats) {
Restaurant.getInstance().menu.get().categories.add(str);
}
if(!Restaurant.getInstance().menu.get().dishDownloadFinished.get()) {
Restaurant.getInstance().menu.get().dishDownloadFinished.set(Boolean.TRUE);
}
} catch(IOException err) {
Log.e(err);
ToastBar.showErrorMessage("Error loading list of dishes: " + err);
Log.sendLog();
DishService (Client)

9. public class DishService {
public static boolean hasCachedDishList() {
return Storage.getInstance().exists("DishListCache");
}
public static void loadDishesFromCache() {
JSONParser p = new JSONParser();
try {
Map<String, Object> m = p.parseJSON(new InputStreamReader(
Storage.getInstance().createInputStream("DishListCache"), "UTF-8"));
List<Object> l = (List<Object>)m.get("dishes");
Restaurant.getInstance().menu.get().dishes.clear();
for(Object o : l) {
Dish d = new Dish();
d.getPropertyIndex().populateFromMap((Map)o);
Restaurant.getInstance().menu.get().dishes.add(d);
}
List<String> cats = (List<String>)m.get("categories");
Restaurant.getInstance().menu.get().categories.clear();
for(String str : cats) {
Restaurant.getInstance().menu.get().categories.add(str);
}
if(!Restaurant.getInstance().menu.get().dishDownloadFinished.get()) {
Restaurant.getInstance().menu.get().dishDownloadFinished.set(Boolean.TRUE);
}
} catch(IOException err) {
Log.e(err);
ToastBar.showErrorMessage("Error loading list of dishes: " + err);
Log.sendLog();
DishService (Client)

10. public static void updateDishesFromServerSync() {
NetworkManager.getInstance().addToQueueAndWait(updateDishesFromServer());
}
public static void updateDishesFromServerAsync() {
NetworkManager.getInstance().addToQueue(updateDishesFromServer());
}
private static ConnectionRequest updateDishesFromServer() {
ConnectionRequest cr = new ConnectionRequest(MyRestaurant.SERVER_URL + "dish", false) {
private boolean autoLoad;
protected void readResponse(InputStream input) throws IOException {
JSONParser p = new JSONParser();
Map<String, Object> m = p.parseJSON(new InputStreamReader(input, "UTF-8"));
String stamp = (String)m.get("stamp");
if(stamp != null) {
Preferences.set("lastTimeStamp", stamp);
OutputStream o = Storage.getInstance().createOutputStream("DishListCache");
o.write(Result.fromContent(m).toString().getBytes());
o.close();
autoLoad = true;
}
}
protected void postResponse() {
if(autoLoad) {
loadDishesFromCache();
}
}
};
cr.addArgument("stamp", Preferences.get("lastTimeStamp", "0"));
cr.addArgument("appId", MyRestaurant.APP_AUTH);
return cr;
DishService (Client)

11. public static void updateDishesFromServerSync() {
NetworkManager.getInstance().addToQueueAndWait(updateDishesFromServer());
}
public static void updateDishesFromServerAsync() {
NetworkManager.getInstance().addToQueue(updateDishesFromServer());
}
private static ConnectionRequest updateDishesFromServer() {
ConnectionRequest cr = new ConnectionRequest(MyRestaurant.SERVER_URL + "dish", false) {
private boolean autoLoad;
protected void readResponse(InputStream input) throws IOException {
JSONParser p = new JSONParser();
Map<String, Object> m = p.parseJSON(new InputStreamReader(input, "UTF-8"));
String stamp = (String)m.get("stamp");
if(stamp != null) {
Preferences.set("lastTimeStamp", stamp);
OutputStream o = Storage.getInstance().createOutputStream("DishListCache");
o.write(Result.fromContent(m).toString().getBytes());
o.close();
autoLoad = true;
}
}
protected void postResponse() {
if(autoLoad) {
loadDishesFromCache();
}
}
};
cr.addArgument("stamp", Preferences.get("lastTimeStamp", "0"));
cr.addArgument("appId", MyRestaurant.APP_AUTH);
return cr;
DishService (Client)

12. public static void updateDishesFromServerSync() {
NetworkManager.getInstance().addToQueueAndWait(updateDishesFromServer());
}
public static void updateDishesFromServerAsync() {
NetworkManager.getInstance().addToQueue(updateDishesFromServer());
}
private static ConnectionRequest updateDishesFromServer() {
ConnectionRequest cr = new ConnectionRequest(MyRestaurant.SERVER_URL + "dish", false) {
private boolean autoLoad;
protected void readResponse(InputStream input) throws IOException {
JSONParser p = new JSONParser();
Map<String, Object> m = p.parseJSON(new InputStreamReader(input, "UTF-8"));
String stamp = (String)m.get("stamp");
if(stamp != null) {
Preferences.set("lastTimeStamp", stamp);
OutputStream o = Storage.getInstance().createOutputStream("DishListCache");
o.write(Result.fromContent(m).toString().getBytes());
o.close();
autoLoad = true;
}
}
protected void postResponse() {
if(autoLoad) {
loadDishesFromCache();
}
}
};
cr.addArgument("stamp", Preferences.get("lastTimeStamp", "0"));
cr.addArgument("appId", MyRestaurant.APP_AUTH);
return cr;
DishService (Client)

13. public static void updateDishesFromServerSync() {
NetworkManager.getInstance().addToQueueAndWait(updateDishesFromServer());
}
public static void updateDishesFromServerAsync() {
NetworkManager.getInstance().addToQueue(updateDishesFromServer());
}
private static ConnectionRequest updateDishesFromServer() {
ConnectionRequest cr = new ConnectionRequest(MyRestaurant.SERVER_URL + "dish", false) {
private boolean autoLoad;
protected void readResponse(InputStream input) throws IOException {
JSONParser p = new JSONParser();
Map<String, Object> m = p.parseJSON(new InputStreamReader(input, "UTF-8"));
String stamp = (String)m.get("stamp");
if(stamp != null) {
Preferences.set("lastTimeStamp", stamp);
OutputStream o = Storage.getInstance().createOutputStream("DishListCache");
o.write(Result.fromContent(m).toString().getBytes());
o.close();
autoLoad = true;
}
}
protected void postResponse() {
if(autoLoad) {
loadDishesFromCache();
}
}
};
cr.addArgument("stamp", Preferences.get("lastTimeStamp", "0"));
cr.addArgument("appId", MyRestaurant.APP_AUTH);
return cr;
DishService (Client)

14. public static void updateDishesFromServerSync() {
NetworkManager.getInstance().addToQueueAndWait(updateDishesFromServer());
}
public static void updateDishesFromServerAsync() {
NetworkManager.getInstance().addToQueue(updateDishesFromServer());
}
private static ConnectionRequest updateDishesFromServer() {
ConnectionRequest cr = new ConnectionRequest(MyRestaurant.SERVER_URL + "dish", false) {
private boolean autoLoad;
protected void readResponse(InputStream input) throws IOException {
JSONParser p = new JSONParser();
Map<String, Object> m = p.parseJSON(new InputStreamReader(input, "UTF-8"));
String stamp = (String)m.get("stamp");
if(stamp != null) {
Preferences.set("lastTimeStamp", stamp);
OutputStream o = Storage.getInstance().createOutputStream("DishListCache");
o.write(Result.fromContent(m).toString().getBytes());
o.close();
autoLoad = true;
}
}
protected void postResponse() {
if(autoLoad) {
loadDishesFromCache();
}
}
};
cr.addArgument("stamp", Preferences.get("lastTimeStamp", "0"));
cr.addArgument("appId", MyRestaurant.APP_AUTH);
return cr;
DishService (Client)

15. @Override
protected Container createContent() {
Container c = new Container(BoxLayout.y());
final Menu m = Restaurant.getInstance().menu.get();
if(m.dishes.size() == 0) {
if(DishService.hasCachedDishList()) {
DishService.loadDishesFromCache();
}
}
if(m.dishes.size() > 0) {
for(Dish currentDish : m.dishes) {
c.add(createDishContainer(currentDish));
}
c.addPullToRefresh(() -> {
DishService.updateDishesFromServerSync();
c.removeAll();
for(Dish currentDish : m.dishes) {
c.add(createDishContainer(currentDish));
}
c.revalidate();
});
} else {
MainMenuForm

16. @Override
protected Container createContent() {
Container c = new Container(BoxLayout.y());
final Menu m = Restaurant.getInstance().menu.get();
if(m.dishes.size() == 0) {
if(DishService.hasCachedDishList()) {
DishService.loadDishesFromCache();
}
}
if(m.dishes.size() > 0) {
for(Dish currentDish : m.dishes) {
c.add(createDishContainer(currentDish));
}
c.addPullToRefresh(() -> {
DishService.updateDishesFromServerSync();
c.removeAll();
for(Dish currentDish : m.dishes) {
c.add(createDishContainer(currentDish));
}
c.revalidate();
});
} else {
MainMenuForm

17. } else {
final Container infi = FlowLayout.encloseCenter(new InfiniteProgress());
c.add(infi);
m.dishDownloadFinished.addChangeListener(p -> {
c.removeAll();
for(Dish currentDish : m.dishes) {
c.add(createDishContainer(currentDish));
}
categoryModel.removeAll();
for(String s : m.categories) {
categoryModel.addItem(s);
}
c.revalidate();
});
}
c.setScrollableY(true);
c.setScrollVisible(false);
dishesContainer = c;
return c;
}
MainMenuForm