https://www.youtube.com/watch?v=9grEmpRfK0Y @Controller Vs @RestController How a spring boot application bootstraps? REST API Best practices Microservices interview questions Monolithic Architecture Vs Microservices Architecture How to manage IPs and servers in a microservices architecture How Service Discovery and Registration works? (A problem Scenario) How Client-side load balancing is different from Server-side load balancing? Is server-side load balancing […]
https://www.youtube.com/watch?v=yX2w-Sof95s Q1. @component vs @service vs @repository Q2. What will happen if you will use @service over a DAO? Q3. Explain spring Bean Lifecycle Q4. How you will call the @PreDestroy marked methods in the standalone application. Q5. Explain the helper class that initializes and destroys the web application context. Q6. What are the RestClients […]
Classloader What is ClassLoader? Bootstrap ClassLoader in Java Extension ClassLoader in Java Application/System ClassLoader Collection Fail-Safe and Fail-Fast in Java Solid Principles SOLID Principles Garbage Collector G1 Garbage Collector Garbage Collector Heap vs Stack Memory in Java What is HashMap Java Versions Java 8 Java 9 to 22 Java Versions List What is New in […]
What is NKD? The NDK, or Native Development Kit, is a set of tools provided by Android for developers to write and implement performance-critical parts of their applications using native code languages like C and C++. This is particularly useful for tasks that require high performance, such as graphics-intensive applications, games, or algorithms that benefit […]
In Dart, futures and streams are fundamental concepts used for asynchronous programming. They provide a way to handle operations that may not immediately return a result, such as network requests, file I/O, or computations that take time to complete. Futures: Definition: A future represents a potential value or error that will be available at some […]
Machine learning (ML) can solve a wide variety of problems, including: Classification: This is the task of assigning a category to an input. For example, a machine learning model could be trained to classify images of animals into different categories, such as cats, dogs, and horses. Regression: This is the task of predicting a continuous […]
Object LiteralDebounceDesign PatternGuard StatementTuple Coupling Tight coupling : In general, Tight coupling means the two classes often change together. In other words, if A knows more than it should about the way in which B was implemented, then A and B are tightly coupled. Loose coupling : In simple words, loose coupling means they are […]
DOM, Shadow Dom, Virtual DOM State and props What is StyleSheet.create()? StyleSheet.create() is a function that takes a plain JavaScript object and returns a StyleSheet object. Instead of creating a new style object every time, StyleSheet helps to create style objects with an ID which is further used to reference instead rendering it again. How […]
What is MVC? The MVC framework is an architectural pattern that separates an applications into three main logical components Model, View, and Controller. Hence the abbreviation MVC. The full form MVC is Model View Controller. In this architecture, a component is built to handle specific development aspects of an application. MVC separates the business logic […]
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import Firebase import UserNotifications class AppDelegate: UIResponder, UIApplicationDelegate, MessagingDelegate { func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool { .... // Use Firebase library to configure APIs FirebaseApp.configure() if #available(iOS 10.0, *) { // For iOS 10 display notification (sent via APNS) UNUserNotificationCenter.current().delegate = self let authOptions: UNAuthorizationOptions = [.alert, .badge, .sound] UNUserNotificationCenter.current().requestAuthorization( options: authOptions, completionHandler: {_, _ in }) } else { let settings: UIUserNotificationSettings = UIUserNotificationSettings(types: [.alert, .badge, .sound], categories: nil) application.registerUserNotificationSettings(settings) } application.registerForRemoteNotifications() InstanceID.instanceID().instanceID { (result, error) in if let error = error { print("Error fetching remote instance ID: \(error)") } else if let result = result { // FCMToken.saveFCMToken(token: result.token) LoginUserModel.shared.fCMToken = result.token print("Remote instance ID token: \(result.token)") } } Messaging.messaging().delegate = self if let pushnotificationInfo = launchOptions?[UIApplication.LaunchOptionsKey.remoteNotification] { if let pushnotificationInfoDictionary = pushnotificationInfo as? Dictionary<AnyHashable, Any>{ // NSLog("App has been launch through push notifications. \(pushnotificationInfoDictionary)") // UserDefaults.standard.set(pushnotificationInfoDictionary, forKey: "NotificationData") DispatchQueue.main.asyncAfter(deadline: .now() + 2.0) { self.handleRemoteNotification(notificationInfo: pushnotificationInfoDictionary, shouldInvokeUI: true) } //self.handleRemoteNotification(notificationInfo: pushnotificationInfoDictionary) } } return true } } |
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//MARK:- Push Notification Handle extension AppDelegate { func application(_ application: UIApplication, didRegisterForRemoteNotificationsWithDeviceToken deviceToken: Data) { print("DEVICE TOKEN = \(deviceToken)") Messaging.messaging().apnsToken = deviceToken } func application(_ application: UIApplication, didFailToRegisterForRemoteNotificationsWithError error: Error) { print(error) } func application(_ application: UIApplication, didReceiveRemoteNotification userInfo: [AnyHashable : Any], fetchCompletionHandler completionHandler: @escaping (UIBackgroundFetchResult) -> Void) { // Print full message. print("didReceiveRemoteNotification : \(userInfo)") completionHandler(UIBackgroundFetchResult.newData) } // The callback to handle data message received via FCM for devices running iOS 10 or above. func applicationReceivedRemoteMessage(_ remoteMessage: MessagingRemoteMessage) { print(remoteMessage.appData) } func messaging(_ messaging: Messaging, didReceiveRegistrationToken fcmToken: String) { print("Firebase registration token: \(fcmToken)") LoginUserModel.shared.fCMToken = fcmToken } } //MARK: - //@available(iOS 10, *) extension AppDelegate : UNUserNotificationCenterDelegate { //MARK:- calls when application is forground mode func userNotificationCenter(_ center: UNUserNotificationCenter, willPresent notification: UNNotification, withCompletionHandler completionHandler: @escaping (UNNotificationPresentationOptions) -> Void) { let userInfo = notification.request.content.userInfo // Print full message. print(userInfo) //Handle if app receive notification in foreground mode //self.handleRemoteNotification(notificationInfo: userInfo, shouldInvokeUI: true) // Change this to your preferred presentation option completionHandler(.sound) } //MARK:- calls when application is background mode func userNotificationCenter(_ center: UNUserNotificationCenter, didReceive response: UNNotificationResponse, withCompletionHandler completionHandler: @escaping () -> Void) { let userInfo = response.notification.request.content.userInfo //Handle if the app receives notification in background mode and we click on notification. self.handleRemoteNotification(notificationInfo: userInfo, shouldInvokeUI: true) completionHandler() } func handleRemoteNotification(notificationInfo: Dictionary<AnyHashable, Any>, shouldInvokeUI:Bool = false) { NotificationCenter.default.post(name: NSNotification.Name.RecevedPushNotification, object: nil, userInfo: notificationInfo) clearNotifications() } func clearNotifications(){ UIApplication.shared.applicationIconBadgeNumber = 0 // UIApplication.shared.cancelAllLocalNotifications() let center = UNUserNotificationCenter.current() center.removeAllDeliveredNotifications() // To remove all delivered notifications center.removeAllPendingNotificationRequests() // To remove all pending notifications which are not delivered yet but scheduled. } } |
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enum NotificationType: String { case admin = "administrator" case comment = "comment" case requestReview = "request_review" case review = "review" case requestViewProfile = "request_view_profile" case sharePost = "sharepost" case shareProfile = "shareprofile" case unIdentify = "" } class NotificationHandler { static let NOTIFICATION_TYPE_KEY = "type" static func categoryForRemoteNotification(notificationInfo:Dictionary<AnyHashable, Any>) -> NotificationType { var categoryType:String = "" if let apsData = notificationInfo["aps"] as? Dictionary<String, Any>, let notificationType = apsData[NOTIFICATION_TYPE_KEY] as? String{ categoryType = notificationType } else if let notificationType = notificationInfo[NOTIFICATION_TYPE_KEY] as? String{ categoryType = notificationType } return NotificationType(rawValue: categoryType) ?? .unIdentify } static func extract<T>(value: String, from notificationInfo: Dictionary<AnyHashable, Any>, type: T.Type) -> T? { var categoryType: T? = nil if let apsData = notificationInfo["aps"] as? Dictionary<String, Any>, let notificationType = apsData[value] as? T { categoryType = notificationType } else if let notificationType = notificationInfo[value] as? T { categoryType = notificationType } return categoryType } static func extractPayload(from notificationInfo: Dictionary<AnyHashable, Any>) -> [String: Any]? { guard let payload = NotificationHandler.extract(value: "payload", from: notificationInfo, type: String.self) else { return nil } print("User Id:: \(payload)") return JsonOperation.toDictionaryFrom(string: payload) } } |
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//Make "RecevedPushNotification" key extension NSNotification.Name { static let RecevedPushNotification:NSNotification.Name = NSNotification.Name.init("RecevedPushNotification") } //Register Observer where you wants to use eg. ViewController NotificationCenter.default.addObserver(self, selector: #selector(pushNotification), name: NSNotification.Name.RecevedPushNotification, object: nil) // Do operation when you recive notification @objc func pushNotificationx(notification: Notification) -> Void { print(notification.userInfo) if let notificationInfo: Dictionary<AnyHashable, Any> = notification.userInfo { let receivedNotificationCategory = NotificationHandler.categoryForRemoteNotification(notificationInfo: notificationInfo) switch receivedNotificationCategory { case .admin: print("Notification:: Admin") if let payload: [String : Any] = NotificationHandler.extractPayload(from: notificationInfo ) { print(payload) } break } } } |