listener – Page 2

Android10 LocationListener’s onStatusChanged is abandoned

OnStatusChanged of LocationListener is deprecated in Android10, this callback is never called on Android Q and above, the provider can be considered to be always in LocationProvider#AVAILABLE state. LocationListener | Android Developers There are following solutions: ① Use LocationListenerCompat (the device must be equipped with GMS) ② Use Amap SDK, Baidu SDK or third party […]

Spring | Event listener applications and best practices

Introduction In a complex software development environment, communication and information exchange between components are particularly important. The Spring framework, as one of the most popular development frameworks in the Java world, provides a powerful event listener model that makes communication between components more flexible and decoupled. This article mainly discusses the principles, usage methods and […]

ZooKeeper, CuratorFramework, Watcher, ConnectionStateListener

ZooKeeper The role of Zookeeper is to provide a distributed coordination service, which allows communication and coordination between various nodes in the distributed system, thereby ensuring the consistency and reliability of the entire system. The core of Zookeeper is a distributed file system, which can store and manage various information in distributed systems, such as […]

[Vue3 source code analysis] watch listener

export function watch<T = any, Immediate extends Readonly<boolean> = false>( source: T | WatchSource<T>, cb: any, options?: WatchOptions<Immediate> ): WatchStopHandle {<!– –> // In development environment, if the callback function is not a function, issue a warning if (__DEV__ & amp; & amp; !isFunction(cb)) {<!– –> warn( `\`watch(fn, options?)\` signature has been moved to a […]

Tomcat memory horse (1) Listener type

1. Introduction to Tomcat The main functions of Tomcat As a web server, tomcat implements two very core functions: Http server function: Perform Socket communication (based on TCP/IP) and parse HTTP messages Servlet container function: Load and manage Servlet, and the Servlet is specifically responsible for processing Request requests. The above two functions correspond to […]

springboot listener

Using listeners in springboot Article directory Using listeners in springboot 1. Overview of listeners 2. Listen to the Servlet context object 3. Monitor the Http session Session object Listen for client requests Servlet Request object 4. Custom listening events in Springboot 4.1 Custom events 4.2 Custom listener 1. Overview of listeners What is a web […]

Four ways of SpringBoot event listener

Java event listening The concept of event monitoring: Event monitoring is to allow the computer to obtain some data through your operations and react to the data, feeding back corresponding actions or instructions. Participants in the event mechanism in Java have three roles; event object: event status object, inherited from java.util.EventObject, used as a number […]

Android development dragShadowBuilder and OnDragListener usage explanation

Foreword To implement View dragging in Android, you do not need to rewrite OnTouchListener yourself. Android has provided DragShadowBuilder and OnDragListener to easily realize such needs. The principle of DragShadowBuilder actually copies an image independent of the current app process for dragging. DragShadowBuilder can normally implement the drag and drop function within the App or […]