What is a event handler?
What is a event handler?
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.
How are event handlers processed?
Each key node has a handler that receives key events when the key has focus. The handler responds to the key-pressed and key-released events for the Enter key by changing the color of the key on the screen. The event is then consumed so that the keyboard node, which is the parent node, does not receive the event.
What is an event handler in OIM?
Event Handlers are tied to specific entities in OIM like ‘Users’ and ‘Groups’. They are also tied to specific transactions, like ‘CREATE’, ‘MODIFY’ or ‘DELETE’, and they can also be tied to any transaction. In OIM 11g, the Event Handlers are implemented through the plugin framework.
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).
What is the difference between event handler and event listener?
Note: Event handlers are sometimes called event listeners — they are pretty much interchangeable for our purposes, although strictly speaking, they work together. The listener listens out for the event happening, and the handler is the code that is run in response to it happening.
What is Adapter in OIM?
Pre-Populate Adapter – specific type of rule generator attached to a user-created form field that can automatically generate data to the form but does not save that data to the OIM database but does send that information to appropriate directory user object.
Which of the following is considered as the central element of an event driven application?
The central element of an event-driven application is a scheduler that receives a stream of events and passes each event to the relevant event-handler.
What is dispatcher in AEM?
Dispatcher is basically used to perform Caching, Load Balancing and filter incoming request from client to AEM publish instances. It also protects our AEM publish servers from attacks by restricting access from unknown sources using filters.
What are handler functions?
A handler is a routine/function/method which is specialized in a certain type of data or focused on certain special tasks. Examples: Event handler – Receives and digests events and signals from the surrounding system (e.g. OS or GUI). Memory handler – Performs certain special tasks on memory.
What is the difference between event and event handler?
The event is the thing that RAISES an event, to which something will subscribe. The EventHandler is the thing that HANDLES an event – i.e. it specifies the method that is used to subscribe to the event.
