What do you mean by event handling?
Event Handling is the mechanism that controls the event and decides what should happen if an event occurs. This mechanism have the code which is known as event handler that is executed when an event occurs. Java Uses the Delegation Event Model to handle the events.
What is the use of Eventhandler?
In programming, an event handler is a callback routine that operates asynchronously once an event takes place. It dictates the action that follows the event. The programmer writes a code for this action to take place. An event is an action that takes place when a user interacts with a program.
What is event handling in Java with example?
Events are generated as result of user interaction with the graphical user interface components. For example, clicking on a button, moving the mouse, entering a character through keyboard,selecting an item from list, scrolling the page are the activities that causes an event to happen.
What is event handler in AEM?
JCR Observer is the lowest-level event handling in AEM. As its name indicates, it is at the JCR level and allows to listen to JCR-level events, gathered in sets (corresponding to persistence transactions).
How does event based programming work?
What is event-driven programming? Event-driven programming is a paradigm where entities (objects, services, and so on) communicate indirectly by sending messages to one another through an intermediary. The messages are typically stored in a queue before being handled by the consumers.
What is event in OOP?
An event occurs when an object sends a signal that an action has taken place. The action can be caused by user interaction, such as a button being clicked, or triggered by program logic, such as a timer.
What is dispatcher in AEM?
The Dispatcher stores the cached files on the web server as if they were part of a static website. If a user requests a cacheable document the Dispatcher checks whether that document exists in the web server’s file system: if the document is cached, Dispatcher returns the file.
What is sling in AEM?
Sling Models are annotation driven Java “POJO’s” (Plain Old Java Objects) that facilitate the mapping of data from the JCR to Java variables, and provide a number of other niceties when developing in the context of AEM.